SY27 2314 5_3277_Display_Station_s_1_and_2_Troubleshooting_Guide_Jul75 5 3277 Display Station S 1 And 2 Troubleshooting Guide Jul75
User Manual: Pdf SY27-2314-5_3277_Display_Station_s_1_and_2_Troubleshooting_Guide_Jul75
Open the PDF directly: View PDF 
.
Page Count: 124
| Download | |
| Open PDF In Browser | View PDF |
====- ------ ------ -- ---- .= -- --_.- Maintenance Library Display Station Models 1 and 2 Troubleshooting Guide SY27-2314-5 Preface The IBM 3270 Information Display System consists of control units, display stations, printers, and optional feature devices. This manual contains all the information required to maintain IBM 3277 Display Stations and features such as keyboards, selector-light pen, magnetic card reader, security keylock, and audible alarm. The purpose of this manual is to present maintenance and repair information rather than theory of operation information. This manual is organized in eight sections. Sections 1 and 2 contain introductory and maintenance background material. Sections 3, 4, and 5 contain the Symptom Index, Troubleshooting Diagrams, and repair data. These three sections contain all diagnostic procedures and repair information necessary to correct a display station malfunction. Miscellaneous reference data is included in Section 6. Section 7 contains location diagrams to aid in identifying and locating the display station components referenced in other sections of this manual. Instructions for installing the display station are presented in Section 8. To successfully use this manual and repair IBM 3277 display stations, maintenance personnel should have a level of training equivalent to the 3270 system basic FE course. Because the 3277 attaches to both local and remote control units, an understanding of the control unit to which the display station is attached is also helpful. The titles and form numbers of the two control unit Trou bleshooting Guides are listed below under "Companion Manuals". Both Troubleshooting Guides contain a glossary of terms that are applicable to control units and display stations. Companion Manuals: • • • • 3271 Control Unit Models 1 and 2 Troubleshooting Guide, SY27-2311 3272 Control Unit Models 1 and 2 Troubleshooting Guide, SY27-2312 3275/3277 Display Station Models Catalog, S 126-0006 IDR-M ID Reader-Motorized Theory-Maintenance-Parts Catalog, SY26-4188 The following pUblications may also prove useful: • An Introduction to the 3270 Information Display System, GA27-2739 • IBM 3270 Information Display System Component Description, GA27-2749 Sixth Edition (July, 1975) This is a major revision of, and obsoletes, SY27-2314-4 with Technical Newsletter SN31-0146. The TN L incorporated maintenance information about fuses. This information is included in Chapters 4, 5, and 7. Several corrections are made to the Troubleshooting Diagram in Chapter 4. Other technical and editorial corrections are made throughout the manual. Significant changes or additions to the text and illustrations are indicated by a vertical line to the left of the change. This edition applies to display stations at Board EC level 717946 and earlier. Changes are periodically made to the information herein; any such changes will be reported in subsequent revisions or Technical Newsletters. Text for this manual has been prepared with the IBM SELECTRIC ®Composer. A form is provided at the back of this publication for reader's comments. If the form has been removed, comments may be addressed to: IBM System Communications Division, Product Publications, Dept. 52L, Neighborhood Road, Kingston, N.Y., 12401 ©Copyright International Business Machines Corporation, 1972, 1973, 1974, 1975' ii 1 and 2 Parts Contents Section 1. 1.1 1.1.1 1.1.2 1.1.3 1.2 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 Maintenance Approach Introduction Online/Offline Maintenance Field Replaceable Units (FRU) Troubleshooting Aids Trouble Analysis Obvious Symptoms Isolation to a Display Station Offline Symptoms Formatted Buffer Symptoms Customer-Reported Failures 1-1 1-1 1-1 1-1 1-1 1-1 1-1 1-1 1-2 1-2 1-2 Section 2. 2.1 2.1.1 2.1.2 2.1.3 2.1.3.1 2.1.3.2 2.1.3.3 2.1.3.4 2.1.4 2.1.5 2.2 2.2.1 2.2.2 2.2.2.1 2.2.2.2 2.2.3 Tools and Diagnostic Programs Maintenance Tools Customer Engineer Tool Kit Osci 1I0scope Logic Probes Description Probe Usage Probe Checkout Probe Repair Alignment Mask lOR FE Test Card Diagnostic Programs Test Patterns Requesting RFT Patterns Local Display Stations Remote Display Stations Online Tests (Ol Ts) 2-1 2-1 2-1 2·1 2-1 :2 ~ 2-1 2-1 2-3 2-3 2-3 2-3 2-3 2-4 2-8 2-8 2-9 Section 3. 3.1 3.2 Symptom Index Symptom I ndex Usage Developing Symptoms 3-1 3-1 3-1 Section 4. Trouble!'hooting Diagrams 4-1 Section 5. 5.1 5.1.1 Checks, Adjustments, and Removals Checks Display Station Test Using Test Pattern 1 Display Station Operational Test (without Test Pattern 1) Voltage Checks low-Voltage DC Checks High·Voltage Check Arc-Suppression Check 6.3V AC Check High-Voltage Power Supply Check Keyboard Checks Voltages Key Module and Encoding - Type A Keyboards Only Output Codes Shift Key Modules - Type A Keyboards Only Spacebar Assembly Mechanical Checks Adjustm ents Display I mage Adjustments Brightness Contrast Focus Yoke Magnetic Centering Rings Modell Analog Card Adjustments 5-1 5-1 5.1.2 5.1.3 5.1.3.1 5.1.3.2 5.1.3.3 5.1.3.4 5.1.3.5 5.1.4 5.1.4.1 5.1.4.2 " 5.1.4.3 5.1.4.4 5.1.4.5 5.2 5.2.1 5.2.1.1 5.2.1.2 5.2.1.3 5.2.1.4 5.2.1.5 5.2.1.6 5-1 5-2 5-3 5-3 5-4 5-4 5-4 5·5 5-5 5-5 5-5 5-6 5-6 5-6 5-6 5-6 5·7 5·7 5·7 5-7 5-7 5-7 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 5.4.7 5.4.8 Model 2 Analog Card Adjustments -12V Regulator Card OFF-PUSH Switch (Model 2 Only) Removals Covers Power Components Low-Voltage Power Supply A~mbly -12V Regulator Card AC Capacitor Model 1 Prime Power Box Model 2 Prime Power Box Modell Ferro Transformer (50-Hz) Modell Ferro Transformer (50-Hz) Model 2 Ferro Transformer (50-Hz) Model 2 Ferro Transformer (50-Hz) High· Vo lrage Power Supply Fuses Anaiog Components CRT Yoke and Shields Modell Analog Card Model 2 Analog Card Modell Brightness and Contrast Controls Model 2 Brightness and Contrast Controls Power Control Switch Logic Components Logic Card logic Board Keyboard Components Keyboard from Display Station Keyboard Top Cover Keyboard A~mbly from Bottom Pan Audible Feedback Assembly Keybutton Type A Switch Module Type A Spacebar Assemblies Keybutton Support Modules - Type A Keyboards Only Type B Module Type B Spacebar Circuit Board and Electronics Assembly Type B Keyboards Only Audible Alarm (Optional Feature) Security Keylock (Optional Feature) Selector Light-Pen (Optional Feature) Operator Identification Card Reader (Optional Feature) Type B Keyboard Maintenance Aids Cleaning Liquid Spills Key Modules Contamination Shields Protective Membrane/Shield G rou nd Check Ground Loop Isolation Crooked or loose Key tops Section 6. 6.1 6,1.1 6.1.2 6.2 6.2.1 Reference Data Controls External Controls I ntern:ll Cf'fltrols I ndicatC' " External I nd Icalo. ;, 5.2.1.7 5.2.2 5.2.3 5.3 5.3.1 5.3.2 5.3.2.1 5.3.2.2 5.3.2.3 5.3.2.4 5.3.2.5 5.3.2.6 5.3.2.7 5.3.2.8 5.3.2.9 5.3.2. to 5.3.2.11 ~.3.3 5.3.3.1 5.3.3.2 5.3.3.3 5.3.3.4 5.3.3.5 5.3.3.6 5.3.3.7 5.3.4 5.3.4.1 5.3.4.2 5.3.5 5.3.5.1 5.3.5.2 5.3.5.3 5.3.5.4 5.3.5.5 5.3.5.6 5.3.5.7 5.3.5.8 5.3.5.9 5.3.5.10 5.3.5.11 5.3.6 5.3.7 5.3.8 5.3.9 5-8 5-8 5-8 5-9 5-9 5-10 5-10 5-10 5-10 5-10 5-10 5-10 5-10 5-11 5-11 5-11 5-11 5-11 5-11 5-13 5-13 5-13 5-13 5-13 5-14 5-14 5-14 5-14 5-14 5-14 5-14 5-14 5-14 5-15 5-15 5-17' 5-17 5-18 5-20 5·20 5-20 5-20 5-21 5-21 5-21 5-21 5-21 5-21 5-21 5-22 5-22 5-22 5-22 6-1 6-1 6-1 6-2 6-2 6-2 Contents iii Internal Indicator (SWEEP INDIC) Arc-Suppression Neon Keyboards (Optional Feature) Types of Keyboards EBCDIC Keyboard Codes ASCII Options ASCII Character Generators (Optional Features) ASCII Keyboards (Optional Features) Reference Diagrams 6.2.2 6.2.3 6.3 6.3.1 6.3.2 6.4 6.4.1 6.4.2 6.5 6-3 6-3 6-3 6-3 6-3 6-3 6-3 6-4 64 Section 7. Component Locations 7-1 Section 8. 8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.2.5 I nstallation Instructions General Installation Line Voltage Check Feature Installation Prepowe~-On Checks Power-On Checks Hexadecimal Address Label 8-1 8·1 8·1 8·1 8·1 8·2 8-2 8-2 . X-1 Index Diagrams 5-6 5-7 3277 Maintenance Approach Logic Probes Alignment Mask, Model 1 Alignment Mask, Model 2 Test Pattern 1 (USA EBCDIC) T est Pattern 2 Test Pattern 3 Test Pattern 5 (USA EBCDIC) Character Differences for ASCII and WTC Languages Test Pattern 10 Numbers Test Pattern 1, Model 1 Test Pattern 1, Model 2 Test Pattern 2 Test Pattern 3 Yoke Back Too Far on CRT Neck Yoke Tilted Centering Rings Not Adj usted Properly Character Height Too Small Glow Only on CRT Single Horizontal Line on CRT Model 1 Raster Model 2 Raster Cursor in Every Row Box in Every Character Position No Horizontal Sync No I nterrow Spacing Correct 0 isplay after PO R Out of Focus I mage Yoke Horizontal Return Line Open Open in Yoke Horizontal Winding 1/2 Vertical Yoke Open Horizontal Yoke Open Vertical Yoke Open Display Station Troubleshooting Di&grams (29 Sheets) OFF-PUSH Switch Adjustment Switch Module Removal (Type A) Unsoldering Lead Frame Terminals (Type A) Lead Frame Removal (Type A) Switch Plunger Return Spring Positioning (Type A) Switch Module Orientation (Type A) Torsion Bar Removal (Type A) 5-8 5-9 5-10 Spacebar Guide Module Removal (Tyoe A) Screw Loosening (Type B) Keyboard Assembly Separatio~ (Typ". HI 1·1 2-1 2·2 2-3 24 2-5 2-6 2·7 2-8 2·9 3-1 3·2 3·3 3-4 3-5 3-6 3-7 3-8 3-9 3·10 3-11 3-12 3-13 3-14 3·15 3-16 3·17 3-18 3·19 3-20 3·21 3·22 3-23 4·1 5-1 5·2 5-3 54 5-5 iv 1·2 2·2 2·3 24 2-5 2-6 2-6 2·7 2-8 2-8 3-7 3-7 3·7 3-7 3-7 3-7 3-8 3-8 5·11 5·12 5-13 5·14 6·1 6-2 6-3 6-4 6·5 66 6-7 ' 6=8 • 6·9 6-10 6-11 6·12 6-13 3-8 3-8 3-8 3-8 3-9 3-9 3-9 3-9 3-9 3-9 3-10 3·10 3·10 3·10 3-10 6-14 7-1 7-2 7-3 17-3.1 74 7·5 7·5.1 7-6 7-7 7-8 I 7·9 7-10 7·11 7-12 7-13 7-14 7-15 7-16 7-17 7-18 7-19 4-3 5-9 5·15 5-15 5-15 5-16 5·16 5-17 &17 E-l? 5~R f 8-1 ;,)-1 Module Removal (Type B) Circuit Board and Electronics Assembly (Type B) Base Plate Ground Studs (Type B) Spacebar Pivot Removal (Type B) External Controls and Indicators Typewriter Keyboard Operator Console Keyboard Data Entry Keyboards USA EBCDIC Keyboard Codes (2 Sheets) WTC Language Keyboard Codes ASCII and WTC Language Keyboard Codes Logic Card Data (2 Sheets) Probe Pin Data Keyboard Feature Jumpers Type A Keyboard Encoding Board Layout by Card Function - Without Features (Card Side View) Board Layout by Card Function - With Features (Card Side View) Board Layout Pin Identification Data (Pin Side View) Model 1 Locations, Front View Model 1 Locations, Left·Side View Model 1 Locations, Rear View Location of +5V and +34V Fuses (Model 1) Model 2 Locations, Front View Model 2 Locations, Right-5ide View Location of +5V and +34V Fuses (Model 2) Model 2 Locations, Left-Side View Type A Keyboard Locations Type A Keyboard Pin Assembly and Terminal Location Low-Voltage Printed Circuit Board Low-Voltage Printed Circuit Board Shield Model 2 Voltage Distribution Board Model 1 Prime Power Box Brightness and Contrast Control Terminals High-Voltage Power Supply Model 1 Arc-Suppression Board Analog Card (2 Sheets) Type B Keyboard Locations Type B Keyboard Assembly Type B Keyboard Assembly Pin and Terminal Locations 50-Hz Ferro TB·1 Data F!ow (Foldout; at back of manual) 5-19 5·19 5·19 5-20 6-1 6-5 6-5 6-6 6-7 6-9 6-9 6-10 6-12 6-13 6-13 6-14 6·15 6-16 7-1 7-2 7-3 7-4 7·5 7-6 7·7 7-8 7·9 7·10 7·11 7-12 7-12 7·13 7-13 7·14 7-14 7-15 7-17 7·18 7-19 8-1 FO-1 Abbreviations AID ALD ASCII attention identification automated logic diagram American Standard Code for Information Interchange KB keyboard LV low voltage CE CK CNCL CPU CRT CU CW Customer Engineer check cancel control processing unit cathode-ray tube control unit control word MDT mod ified data tag NL new line PA PC PCBD PF POR PS program access printed circuit printed circuit board program function power on reset power supply DEL DUP delete duplicate EBCDIC EC EOF extended binary-coded-decimal interchange code engineering change end of field SLT SMS SOR solid logic technology standard modu lar system start of record FE Ferro FRU Field Engineering ferro-resonant transformer field replaceable unit TB TCU TEST REO TP terminal board transmission control unit test request test pattern, test point GLP General Logic Probe VOM volt-ohmmeter HV high voltage lOR INS MODE I/O identification reader insert mode input/output Abbreviations y , LEGEND ) Terminal Indicates beginning point of a Troubleshooting Diagram. Action I: Indicates a major action. When more than one action is described, bullet symbols appear to left of each action. Annotation Gives descriptive comment or explanatory note. <> Decision Indicates a point in a Troubleshooting Diagram where a branch to alternate data paths is pOSSible, Probe Indicates a point in a Troubleshooting Diagram where a logic pin should be probed with the loqlc probe. Pin is specified in the symbol. Path to be followed after probing is determilled by probe result. o Car d Chanqe IndlCd(~ v rhat card or cards specified in symbol should be changed and new ones installed. ()+t Paqe Connector ~f)dH,dtes connection point between different sheets of the Troubleshooting Diagrams. Uri /)aqe Connector connection between two parts of the same sheet or diagram. Arrow leaving points to correspondingly-numbered symbol (line-of·sight). Indicates S', '!1t)C)1 t\.1 I" II Data Path Millor Data Path or Control Line Data Bus Nlimber of lines on bus is identified in circle. o 7P Data Transfer Identifies data bits transferred to or from a logic element. Screwdriver Adjustment Switch vi Section 1. Maintenance Approach 1.1 INTRODUCTION Maintenance of IBM 3277 Display Stations (including repair and adjustment of Model 1 and Model 2 units) and of attached features is described in this manual. Features that can be attached to a 3277 include keyboards, a selector light-pen, and an operator identification card reader. The objective of display station maintenance is to return the failing unit to customer service as quickly as possible. This manual guides the Customer Engineer through procedures that enable him to adjust or replace a malfunctioning component. 1.1.1 Online/Offline Maintenance 1.1.3.2 Troubleshooting Diagrams The Customer Engineer is directed to Troubleshooting Diagrams from the Symptom Index. The diagrams detail procedures to isolate a failing F RU or an out-of-tolerance adjustment. The diagrams call out specific checks and observations that shou Id be made during the diagnostic procedure. The logic probe test device is used in many of the diagrammed procedures. 1. 1.3.3 Diagnostic Programs Two types of diagnostic programs may be available to the Customer Engineer. Diagnostic program aids are described in Section 2 of this manual. Display Station maintenance and testing can be performed online and/or offline. It is better, however, to service the unit offline when possible because it eliminates the possibility of interaction with other units of the display system. Unnecessary delays in normal customer information processing are thereby avoided. The maintenance approach described in this manual is structured to perform offline analysis first to resolve reported troubles. Special tools are not required to maintain 3277 Display Stations. The basic Customer Engineer tool kit, the IBM volt-ohmmeter, and the logic probe can successfully isolate most display station problems. An oscilloscope may be required in some instances when the basic tools fail to resolve a problem. 1.1.2 Field Replaceable Units (FRU) 1.2 TROUBLE ANAL VSIS Component replacement is limited to certain fieldreplaceable units (FRU). When the trouble is isolated to an FRU the unit should be replaced immediately rather than repaired. The FRU parts replacement philosophy is practical because functionally packaged logic and densely packed components are used throughout the display station. The sequence in which display station trouble analysis is performed is important in minimizing machine down-time. Diagram 1-1 shows the five-step procedure that should be used to isolate display station failures. The main points of the display station maintenance approach are summarized below. 1.1.3.4 Customer Engineer Tool Kit 1.2.1 Obvious Symptoms 1.1.3 Troubleshooting Aids Several tools are available to the Customer Engineer to simplify trouble analysis. The following paragraphs describe these aids. 1.1.3.1 Symptom Index The Symptom Index (Section 3) lists (by category) malfunctions that may be encountered on display stations. The categories include such areas as display malfunctions, power malfunctions, keyboard malfunctions, etc. In each category, subcategories specify unique trouble areas. The subcategories direct the Customer Engineer to an entry in the Troubleshooting Diagrams (Section 4), which contain step-by-step isolation procedures. In some cases, the Symptom Index points directly to a replaceable unit causing the problem. Obvious symptoms are those that do not require any operator or Customer Engineer action to bep>me evident. Failures that could cause obvious symptoms to occur include display image quality and positioning, mechanical problems, and component breakage. These failures should be remedied by going directly to the Symptom Index or to the appropriate adjustment or removal procedure in Section 5. Use the first entry that matches the failure. 1.2.2 Isolation to a Display Station If an obvious symptom does not exist on a display station, the cause of the failure must be isolated between the control unit and the display station. Sheet 1 of the Troubleshooting Diagrams describes the procedure for isolating the cause of a failure to either the control unit, connecting coaxial cable, or display station. Maintenance Approach 1-1 1.2.3 Offline Symptoms r---.......---or--------...---------.., ,Obvious symptoms include: focus, tilt, centering, physi col damage, etc. I. ' Find failure in ~_.Ylie.s_ _ _ _. .~ Symptom Index. .J' (Use first entry that matches failure.) Once it is determined that the display station is the cause of a failure, an offline symptom should be developed. A quick offline test of the display station is described in paragraph 3.2. That test should expose a repairable symptom. Stop the test as soon as a symptom becomes evident, and match the symptom with one listed in the Symptom Index. Use the first entry that matches the failure. The Symptom Index tells what corrective action should be taken . 1.2.4 Formatted Buffer Symptoms • 2, _ _ _ _ _. .~ Use Troubleshooting Diagram, Sheet 1. ..._ _ _ _ _. .~ Use keyboard check 3. po (Paragraph 3.2). If an offline symptom does not become evident, the entire display station, including features, must be tested with the buffer formatted. The procedure described in paragraph 5.1.1 should be used with Test Pattern 1 to develop a symptom. Stop the test as soon as a symptom becomes evident, and match it in the Symptom Index. Use the first entry that matches the failure. The Symptom Index tells what corrective action should be taken. 1.2.5 Customer-Reported Failures Yes Find failure in Symptom Index. (Use first entry that matches foil ure.) . ._ _ _ _ _. .~Use Test Pattern 1 4. (Paragraph 5. 1• 1). ,.. Find failure in Symptom Index. (Use first entry that matches failure.) Yes f ,-' IL,':,>01- persis ... a>.·.: '·2 • -----.~ Find failure in Symptom Index . (Use first entry that matches failure.) ·n 1·1. 3277 Malfltenance Approach It may be necessary to work with a customer-reported failure if a symptom cannot be developed offline or with Test Pattern 1 using the procedures described in the preceding paragraphs. Try to duplicate the conditions that existed when the customer failure occurred. Match the duplicated symptom in the Symptom Index and perform the corrective action indicated. Use the first entry that matches the failure. If the originally reported failure cannot be duplicated, it must be assumed that it was an operator error or an interm ittent failure that has failed to reappear. Section 2. Tools and Diagnostic Programs This section describes the tools and programmed diagnostic aids used to maintain 3277 Display Stations. A comprehensive description of the logic probe is included because proper use of this tool is essential to successful display station maintenance. 2.1 2.1.1 MAINTENANCE TOO LS Customer Engineer Tool Kit The Customer Engineer tool kit contains all basic tools necessary to maintain IBM 3277 Display Stations. The standard IBM volt-ohmmeter (VOM) is adequate for all voltage measurements. The meter's input impedance of 20,000 ohms per volt causes an erroneous reading when checking the 400V dc power supply. This effect is noted when a check of that power supply is called out. When using the VOM, all dc voltage measurements should be referenced to dc return rather than to frame ground. DC return and frame ground are at different levels when the display station is not connected to a control unit. 2.1.2 Oscilloscope I n some cases of trouble analysis, it may be necessary to use an oscilloscope. The Tektronix * model 453 oscilloscope, or equivalent, should be used when an oscilloscope is required. However, the logic probe is recommended for use, whenever possible, rather than an oscilloscope. 2.1.3 Logic Probes Either of two styles of logic probes can be used to probe signal levels while using the Troubleshooting Diagrams or FE ALDs. The older-style probe (PN453652) is described completely in the following paragraphs and shown in Diagram 2·1 A. The newer General Logic Probe (G LP) is shown in Diagram 2-18. An available GLP Kit (PN 453212) includes the G LP, standard accessories, and the General Logic Probe Manual, SY27-0113. The manual describes the features of the GLP, the functions and limitations of each feature, and a checkout procedure. (That information is not duplicated here, so the user is referred to SY27-0113.) A probe should be obtained from Mechanicsburg by all Customer Engineers who service 3270 units. Normal toolordering procedures should be used to obtain the probe. *Trademark of Tektronix, Inc. 2. 1.3. 1 Description The logic probe (Diagram 2-1 A) is a self-contained device consisting of an anodized aluminum tube with a red and green indicator incorporated near the probe end. A cable containing two wires and SL T-type push-on terminals leads from the sealed top end of the probe. A plastic head with a threaded stud is at the probe end of the device. Red and green indicators tell the state of the net being probed. The three signal states that can be distinguished are: (1) a solid plus level, (2) a solid minus level, and (3) a pulse or the presence of pulses. The two wires with the SL T-type push-on connectors are attached to pins on the back of the logic board being probed. They carry the operating voltage (+5V dc and ground) for the probe. An oscilloscope probe tip screws on the threaded stud at the tip of the probe. This carries the input signals to the indicators. 2.1.3.2 Probe Usage To use the logic probe, a probe tip must be attached to the threaded stud. An SL T probe tip (PN 453163, or equivalent) should be used. The two wires at the top of the probe are attached to the back of the logic board being probed. The leads are clearly labeled: GND and +6V. Connect the GND lead to any D08 pin, and connect the +6V lead to any D03 pin (+5V dc). The leads are connected to the board by pushing the connector at the end of each lead onto the designated pin. When the last wire is connected, the red indicator should light. Connect the oscilloscope probe tip to the pin designated in the Troubleshooting Diagrams or as determined in logic. The following conditions can be observed by the logic probe: 1. Red indication a. Probe not attached to a pin (floating condition), or b. Plus signal on the net being probed. 2. Green indication - Ground (negative) signal on the net being probed. 3. Red and green indication - A pulsing signal (alternately plus and ground) is present on the net being probed. This condition can appear either as the red and the green indicator pulsing on and off, or as both indicators seemingly on at the same time (depending on the frequency of the pulsing signal). Single pulses can also be seen. 2.1.3.3 Probe Checkout Note: This checkout procedure applies to the Older-style logic probe (PN 453652). G LP checkout is described in General Logic Probe Manual, SY27-0113, which accompanies the GLP. Tools and Diagnostic Programs 2-1 Threaded Tip Cable Red Green Connect to any 003 pin Push-Qn Connectors A. Older Style Probe 61 0 I11I1 ~ t=..J N ...J 0 :> Z J: ~ ~ en ~ .- I ~ ~ J: U ..... «...J I 1II1 I Q. :> w Z z 0 Z U ~ 0 0 ~I I IIII I w > « <:J + ..... ~ 0 Z (!) .,> ~ ~@ @ ..... « <:J + w III 0 II: Q. u e,:) 0 ..J ..J W ..... ct w II: Tip Z ~ :> Q. 8 ~ ~ 0) 0) Z W e,:) Z ..... .xl Cable B. IBM General Logic Probe Diagram 2·1. Logic Probes 2-2 Power must be applied to the 3277 during this procedure. 1. Attach probe tip to probe. Use SL T probe tip PN 453163 or similar. 2. Connect probe GN 0 lead wire to any 008 pin. 3. Connect probe +6V lead wire to any 003 pin. Probe's red indicator should light as soon as this wire is attached. 4. Touch probe tip to any 003 pin. Probe's red indicator should remain lighted. 5. Touch probe tip to any 008 pin. Probe's green indicator should light and remain lighted as long as probe is on 008 pin. 6. Remove probe tip from 008 pin. Probe's red indicator should light again. 2.1.3.4 Probe Repair The logic probe is not field-repairable. If trouble is experienced during probe checkout, check for the following conditions: 1. Power is applied to the 3277. 2. Probe leads are on proper source pins. 3. Proper pins are being probed. If the above conditions are met and the probe fails to operate correctly, obtain a new probe before troubleshooting the display station. 2.1.4 Alignment Mask Alignment masks are provided for both display station models. The mask is used during all display image adjustments. Diagram 2-2 illustrates the Model 1 alignment mask (PN 2577899), and Diagram 2-3 illustrates the Model 2 alignment mask (PN 2565170). The mask is constructed of thin, clear plastic. Horizontal and vertical lines printed on the mask serve as boundaries when the display image adjustments described in Section 5 are being performed. Each line is identified by an arrow and a letter designation. The mask is centered against the CRT, and the tabs on each edge are tucked under the CRT bezel to keep the mask ~=== [±] H ===== Diagram 2-2. Alignment Mask. Model 1 in position while adjusting the display image. When the mask is not being used, it should be stored in or near the display station. 2.1.5 lOR FE Test Card This tool (PN 2143816) is a magnetically encoded, plastic test card which conforms to American Banking Association specifications in respect to size, format, and coding. A 37-character test message is encoded on the magnetic stripe on the back of the card. A start-of-record (SOR) character precedes the message, and an end-of-card character and a check character follow the message. The SOR character initiates the read operation but is not transferred to the display station. The card is used to check the performanct~ of the operator identification card reader. Two test cards are shipped with each card reader. 2.2 DIAGNOSTIC PROGRAMS Diagnostic programs provide test patterns and interactive tests to al ign and exercise 3277 Model 1 and Model 2 Display Stations on both local and remote control units. The programs reside in the host CPU program and can be called in by the display station when they are required. The two diagnostic programs that apply to 3277's are Requests for Test (RFT) and Online Tests (OLT). Some systems may not include OL Ts since this is optional to the customer. Most systems will have RFTs. The following paragraphs describe the test patterns and the methods for calling them in to the display station when R FTs or OL Ts are available. 2.2.1 Test Patterns Six test patterns are included in RFTs and OL Ts. Four patterns are used to troubleshoot and align 3277 Display Stations. Model 1 display stations use patterns 1, 2, and 5; Model 2 display stations use patterns 1, 3, and 5. (patterns 4 and 6 are used by printers and are not described here.) EBCDIC, ASCII, and World Trade Corporation display stations use these patterns. EBCDIC test patterns are shown in Diagrams 2-4 through 2-7. Some characters will differ from those shown for patterns 1 and 5 if the display station uses the ASCII code or a WTC language. The differences for those patterns are summarized in Diagram 2-8. 2.2.1. 1 Test Pattern 1 (Diagram 2-4) Test Pattern 1 is a functional test that thoroughly checks the display station. All available characters are displayed. The pattern contains protected data fields, numeric fields, high-intensity fields, nondisplay fields, and selector-pendetectable fields. The field marked "NON DISPLAY" in Diagram 2-4 is not displayed on the screen but is included in the illustration to show that a programmed nondisplay field is in the display buffer. The audible alarm feature is also tested by this pattern. Tools and Diagnostic Programs 2-3 t' 11 B H - -1. r- 0 9 -----. N ......... M J '- -- K 480 CHAR L E G F 1920 CHAR '- 2565170 ./ Diagram 2-3. Alignment Mask, Model 2 Paragraph 5.1.1 describes the comprehensive checkout procedure that uses Test Pattern 1. This pattern is also used during the execution of several Troubleshooting Diagrams. audible alarm (if installed) sounds when this pattern appears on the screen. 2.2.2 Requesting RFT Patterns 2.2.1.2 Test Pattern 2 (Diagram 2-5) Test Pattern 2 is used to align the Modell display image as described in paragraph 5.2.1. All data is protected and displayed in normal intensity. The audible alarm (if installed) sounds when this pattern appears on the screen. 22.1.3 Test Pattern 3 (Diagram 2-6) Test Pattern 3 is used to align the Model 2 image as described in paragraph 5.2.1. All data is protected and displayed in normal intensity. The audible alarm (if installed) sounds when this pattern appears on the screen. 22.1.4 Test Pattern 5 (Diagram 2-7) Test Pattern 5 loads the display station buffer with all available uppercase and lowercase character codes. The 2-4 RFT patterns can be requested for 3277 Display Stations attached to a local control unit (3272) or to a remote control unit (3271). Patterns can be requested from one display station to be displayed on another. To display patterns, the controlling CPU must be operating under as BTAM (Operating System Basic Telecommunications Access Method) or DOS BTAM (Disc Operating System Basic Telecommunications Access Method), and the application program must be set up to accept test requests. The system programmer can verify that the requirements to request RFT patterns are met. The eight test patterns (four EBCDIC and four ASCII) that can be requested by RFTs and their identification numbers are listed in Diagram 2-9. ABCDEFGHIJKLMNOPQRSTUVWXYZ NON DISPLAY COpy ABOVE IN THIS LINE INSERT CK I Q# $ %¢ & ~: ( ) _ + ! ; f t < >? - =I; I / 01 2 3 4 5 6 7 8 9 ~ • - A COpy ABOVE IN THIS LINE ?SEL PEN TEST > SEL PEN TEST ADR-6G48 (Model 1 Patternl (Model 2 Pattern) Notes: 1. AOR - ctppears only when patter') Ie; called "' 2. NON OISPLA Y Irr"n ()L fEP Ie; not displayed 3. Use Olawam 2-8 to determlnP unique chilrilctp.r rr>p!.I(.;elr.~nts wiWIl A~";CII vr lllTe 1.1!)(ludges .lrE' u~ed Diagram 2-4. Test Pattern 1 (USA EBCDIC) ToOls and Diagnostic Programs 2·5 EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE c H H H H H H H H ,H 00 0 H H H DO H TEST PATTERN FOR 3275-1/3277-1 H H ALIGNMENT H H * UNPROTECTED AREA * H H ADR-6040 H EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE 0 Note' AOR appears only when pattern IS called In from OL TEP IS c? : ~ ~ , = ' , . $ * - / , G1 2 34 5 6 7 8 9 ABCDEFGHIJKLMNOPQRSTUVWXYZG123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZ8123456789 &-/ &-/ <;:.«+1 !$*);-, ,% >?:n0'=" <;:.«+1 !$*)j-' ,~t=>?:#Qt=" I"J/L CHECK55555 EOfVl CHECK99 (Model 1 Pattern) Note: I Jse DlagrnJn 28 to deterrninf' unique Lhdrdcter repldU'n1t'nts ,,,,,'twn A:,\:: I l' \", T~ 1,!fHjlJd ciai cabl., betw..n the two di'pl ay stations. Yes No Originol failur. was probably a loose cooxial ccable connection Or on intermittent problem that cannot be resolved at this tim•. No Dia.....m 4-1. Display Station Troubleshooting Diagrams (Sheet 1 of 29) Troublelhooting DWgrams 4-3 1A1 • Pr i mary power cord plugged in. Power switch turned on (Pull). Turn Bri ghtness contra I to maximum (full clockwise). • • Yes • • Turn power off • Open side covers e Check for loose or poor connector ot (5.3.1). A-AIZ3. e Check for loose connector on anaiog card. Yes • • Turn power off . Remove feature card(s). A2, 82, M2. N? • Turn power on. No Sheet 4 • • Turn power off. Replace feature card(s) A2, 82, M2, N2. • • • Turn Brightness control to minimum (fully counterel ockwise). Press and hold INTEN CRT switch. Turn Brightness control toward maximum. • • • Change analog cord • Mod 2, 5.3.3.4). Power on ond adjust (Mod I, 5.3.3.3; Compare display with Diags 3-19 to 3-23. Release INTEN CRT switch. (5.2: I). Yes • Tu"'" pawer off. • Change yoke (5.3.3.2). • Adjust (5.2.1). Yes • • • • • Turn power off • Change analog card (Mod 1, 5.3.3.3; Mod 2, 5.3.3.4). Power on and adjust Turn pawer off. Replace feature card(s) A2, 82, M2, N2. • Chonge analog card (Mod 1, 5.3.3.3 Mod 2, 5.3.3.4). (5.2.1). • Sheet 4 Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 2 of 29) Power on and adjust (5.2. n. • Replace feature card(s) A2, 82, M2, N2. • U~ check procedure (5.1.2) to verify all functions are normal. Sheet 3 Sheet ~ Yes e Remove CRT socket and cone shield (5.3.3.2). Connect CRT socket. Turn power on. e Chonge fUM. e Turn power on. e e No Sheet ~ e Turn power off. e Remove CRT sock.t ond cone shield (5.3.3.2). e Connect CRT socket. No Yes Check cables from PC board to C/TB I ond from PC board to fefTO ~onsformer. e e e Turn power oH. Remove CRT socket. Measure resistance between CRT pins I ond '4. e Tum power aH. e Remove CRT socket. e Measure r.. istance between CRT piN I ond 14. e e e Turn power off. Reploce cone shield. Chonge onalog cord (Mod I, 5.3.3.3; Mod 2, 5.3.3.~). e Power on ond odJust (5.2.1). Yes No e Repoirfoult. e Check out unit for pc-oper operotion. Chonge vol toge distribution board !Diog. 7-6\. Chonge ferro transforMer (Mod I, 5.3.2.6, 5.3.2.7; Mod 2,5.3.2.8, 5.3.2.9). Check cobl .. ond CRT ,ocket for l _ or broken connections. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 3 of 29) Troubleshooting Di8gqms 4-6 Sheet 2 Sheet 2 • Tum power off. • Remove right side cover. • Remove feature cordis) A2, 82, M2, N2. • Turn power on . Meaoure following voltage at HVPS (011/ PS2) ,.~ 10 de return, (Oiag 7-14). Remove push-on connec:tar Ifroln supply pin 3 (IN) and 1 ___ voltage at connector on wi ... • Change analog ecwd. (Mod I, 5.3.3.3 Mod 2, 5.3.3.-4) . • Power on and odj ..t (5.2.1). Yes • Turn po_r off. • Reploce feoture cordh) A2, 82, M2, N2. • Change analog cord (Mod 1,5.3.3.3 Mod 2,5.3.3 .• ) Meaoure following voltages with YOM on 15Y scale. Reference negotive leod to de return. • Power on and odjus t (5.2.1). Measure voltage on voltage distribution board terminol 11. (Oiog 7-11) Me...... e voltage on orc-wppression board terminol E8. (Oiag 7-\5) S..... 3 distribution boord . • Verify repoir. ~m 4-1. Dispbtv Stftion Troubleshooting Diegrems (ShMt 4 of 29) • Remove left cover. • Adjvst Focus using rocus Contro' 0"" H V JX)wer ILlpp',5 2.: 3, Yes • Turn power off . • Change analog cord Mod 1,5.3.3.3 Mod 2, 5.3.3.4 Checlo vol'age at H\ power '''ppl y pic I. CheCk whl .. 0d,u.'ing • Power on and adjust (5.2.1 ). ~ OCuS potent iometer • Diog 7-14) ;, .... f)O ...... eo· oft • C~onge H '. IX>weo r 'juDP! y (~. ) 3 2 10 • Check voltoge at BIAI P3-2 while turning Brightne .. control from maximum to mini .... um. (Oiog 7-12) • Turn power off • • Change control CheCk vo"oge ....,~ile tur~in9 control • Turn power off. Model 1 - Change suppression board. Model 2 - Change distribution boord. Verily repair. (5.3.3.5). • Verify repair. Turn brig clockwise • TUln contrast maxirnufT' • • • Q' B. C k2B ight"'lE!''!t5 ",0)(1"...:,. ...... to mwcin'1um • • f ..o,.... '.;~rj~y fi. • orc(Diog 7-3). VOltage (Dioq 7-61. Turn power off. • Change con'rol 5.3.3.61. • Verd y repair. • Turn power off . • Change analog cord • Mod 2,5.3.3.4) Power On ono odivst (Moo I, 5.3.3.3. (5.2.1). Diagram 4-1. Display Station Troublnhooting Diagrams (Sheet 5 of 29) Troubfnhooting Diagrams 4-7 I • Turn power off. • Open right side cover. • Remove feature cordIs) (A2, 82, M2, N21. • Turn power off. • Remove right side cover. • Remove feature card(s) A2, 82, M2, N2. • Turn power on. • Turn power off. • Change analog card (Mod 1. 5.3.3.3 """d 2. 5. 3 . 3 .4 ) • Power on and adju,t (5.2. I,. • r",n power off . • Change analog card ,Mod 1. 5.3.3.3' Mod 2, 5. 3 . 3 . 4 I • Power on and adjust '5.2. I,. Sheet 8 Diagram 4·1. Display Station Troubleshooting Diagrams (Sheet 6 of 29) • Tum power off • • Remove front cover. • Disconnect signal cable from control unit. • Turn power on. • Remove right side cover. • Remove front cover. • Disconnect control unit cable. Red Green • Tum power off. • Change anolog card (Mood 1, 5.3.3.3 Mod 2, 5.3.3.4). • Power on and adj ust (5.2.1). • Tum power off. • Repair security keylock, or change switch (5.3.7). I • Perform Test Pattern 1 procedure (5.1.1). • Check for parity check after each key. No Sheet 17 Yes * Moodel 2 only. Diagram 4·1. Displav Station Troubleshooting Diagrams (Sheet 7 of 29) Troublelhooting Diagrams 4-9 Sheet 2,4,6,9, 10,26 Yes • Replace keyboard feature cards (A2,821. Displ ay statio" features include keyboard and cord reader with or without .. leclar light-pen. • Turn power on. • Test keyboard operations. • Move keyboard cable from Z4 Ia Zl. • Replace keyboard feature cards (A2, 82). • Tum power on. • Test keyboard operations. Yes • TurI" power off. • Replace cord reader feature card (N21. • Replace light-pen feature card (M2) if previolJsl y removed. • Move keyboard coble No ho'" Zl to Z4. • Turn power off . • Replace light-pen feature card 1M2,. • Turn power on. • Test keyboard operations. • Turn power off. • Replace cord reader feature cord IN2l. • Move keyboard coble frolT' Zl to Z4. -""od.1 2 onl y. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 8 of 29) 4-10 • Turn power off. • Open right side cover. • Remove feature card(s) IA2, 82, M2, N21. • Turn power on. Sheet 8 Sheet 10 Probe while turning power on. Probe while turning power on. I Probe while turning I power on. Yes * Model 2 only. Diagram 4·1. Display Station Troubleshooting Diagrams (Sheet 9 of 29) Troubleshooting Diagrams 4-11 Sheets 9, 28 • • • • Yes Turn power off. Open front cover. Disconnect CU cable. Remove feature cord(s) (A2, 82, M2, N2). • Disconnect signal coble from COr'ltrol unit. • Remove feature card(s) (A2, 82, M2, N2I. • Tur" power on. Yes Green Other Otfter Other Other Other Other Other Other Green I Model 2 Only Diagram 4-1. Display Station Troubleshooting Di.gr.ms (Sheet 10 of 29) 4-12 • Turn power off • • Remove feature cord(s) A2, 82, M2, N2. • Turn power on. • Turn POW" off. • Remove front cove,. • Disconnect lignal cabl. from control lJnil. • Tu,n po_' on. • Display station mUlt be attached 10 an active • Turn po_r off. • Repair cabl. Or change security k.ylock switch (5. J. 7). • V.rl fi". Diagram 4·1. Displav Station Troubleshooting Diagrams (Sheet 11 of 291 Troubleshooting Diagrams 4-13 ··· · Remove right side cover. Disconnect CU cable. Press RE5ET key. Pre.s Space bar. Probe pin. listed in Probe while alternately pressing a character key and RESET key. 2A2-2B2 Code Chart Probe 1 B2505 B2S08 B2509 B2502 B2U05 B2Ml0 B2U09 B2Mll B2513 G G Probe pins R G G G G G G G R G PrObe pi,,~ No Yes I Diagram 4-1_ Display Station Troubleshooting Diagrar'ns (Sheet 12 of 291 4-14 P'ohif' pin,; Probe whil. pr••sing a character key. • Press and re lease CLEAR key. Other Red and Green Sheet 21 Customer program error. All fields defined as protected. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 13 of 29) Troubltllhooti.. 0....... 4-15 2Cl Shee' 18 K Probe while pressin8 a choroc'-r key. Ves Shee' 9 No No Shee'21 Ves Probe while holdirIQ _~,..".&-.,..."...---. key pressed. _ _ _ _ L-_;"';"' _ _ _ _...J Pulsing Green Shee' 21 D~... m 4-1. Display Stlltion Troubleshooting Dill8raml (Sheet 14 of 29) 4-18 No Y.. Probe while holding leey..-d. No Sheet 21 f ---'--...,- - - Other Probe while holdl", keyp--'. --.'---..,;.----~ G ....n No SM: Mod I, Olag 3-1 Mod 2, Olag 3-2 • Connect CU cable. • Load T..t Pattem 1. • Olaoonnect CU cable. e ..... RESET. No e Press • leey to IftOve CUl1Dl' up OM row. e Pr_ ..... leey briefly. Other Probe while holding key",...ed. M Sheet 16 $Met 21 Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 15 of 29) Troubleshooting Diagrams 4-17 Sheet IS Probe while holding ~ key pre,sed. Sheet 17 Probe while holding _ prnsed. key Red ond Gr .... n Sheet 19 Either trouble disappeored, or buffer wos fully protected when trouble reported. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 16 of 29) 4.18 Sheet 7 Sheet 16 No No _--1..---,- - - - -r---------, Probe while holding _ Otner I key pressed. Yes Sheet 21 Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 17 of 29) Troubleshooting Diagrams 4-19 Sheet 11 >heet 14 Probe while ~olding ERASE INPUT key pressed. Probe while holdir>9 ERA Sf EOF key pressed. Probe while holdir>9 ERASE EOF key pressed. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 18 of 29) 4-20 Sheet 16 Probe while pressing RESET key. Probe while holding _ key pressed. Pulsing Green She.t 21 Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 19 of 291 Troubleshooting Diagrams 4-21 Sheet 26 No . r - -........----, - - Other - - - ...--------.., Probe while pressing foiling key, Change defective keybutton (5.3.5.5). No R~d 81'llk IEcK:h (Imp. dlph~'vme' kfl'Y Ie pr ..~st!d dno character Pro hE> whilp CfAR key. ["e~\i"g • Chonge audible feedback assembly if foilure still occurs . • Replace original cord. Sheel9 Pro~)e Nhilp orp,>:.;"o (I fA" "'y Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 20 of 29) 4-22 s•• parograp!. 5. 1.• for descriptian ~ Type A and 8 •• ybaarda. No • Type AChong" keyboard ossembly (5.3.5.3\. e Type 8- Probe while ent... ng Chonge circuit character in ned-to- board (5.3.5.11). lost position. No Other Yes Yes I • ~r:o~~s;:~:=~d I 15.3.5. I\, I • Remove top cover I (5.3.5.2\. I • ::=~~~;!:,rd No I battom pon (5.3.5.3). Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 21 of 29) Troubleshooting Diagqms ~23 Probe while holding tip switch closed. e Chonge selector light-pen (5.3.81. e Verify fix. Other Diagram 4·1. Display Station Trouble.hooting Diagrams (Sheet 22 of 291 4-24 Sheet 2 • Model 1-Remove left side cover. Ves • Model 2-Remove front No cover. • Unplug lin. cord from power source. • Pull OFF -PULL switch. e Set ohmmeter on X 1 range. • Mealure resistance across line cord plug. e Turn power off. • Change analog cord. (Mod 1,5.3.3.3 Mod 2, 5.3.3.4) • Power on and adiust. (5.2.1) e Change, in following order: 1. PC board (5.3.2.1). 2. AC capacitor (5.3.2.3), 3. Ferro transformer (Mod 1,5.3.2.6, 5.3.2.7) Mod 2,5.3.2.8, 5.3.2.9) • Check for repair ofter each unit installed. Ves Ves No • Turn power off. e Remove plugs P2 and P4 from prime pow.r bOl(o e Change fuse F1• • Tum pow.r on. ug 2-wire connector P2 on bock of pri mary pow.r bal(. • Measure resistonce ocross pi ns of pi ug removed. • Ohmmeter on X 1 range. • • • • Turn power off. Reconn.ct plug P2. Change fuse Fl. Turn power on. No Ves • Ch.ck prime power bOl( and connectors. • Change prime powerbox (Mod 1, 5.3.2.4 Mod 2,5.3.2.5) if no shorts or. evident. • Change fuse Fl. • Reconn.ct all conn.ctors. Yes • Turn power off. • Reconnect plug P4. • Remove plug P1 from PC board. • Change fuse Fl. • Ch.ck cord reader and connectors. • Change cord reader if no shorts are evident. • Reconnect all connectors. No Change ferro transformer (Mod 1, 5.3.2.6, 5.3.2.7 Mod 2,5.3.2.8 5.3.2. Change line cord. • Change ferro transformer (Mod 1, 5.3.2.6, 5.3.2.7 Mod 2,5.3.2.8, 5.3.2.9). • Change fuse Fl. • Reconnect all connectors. Sheet 25 Diagram 4-1. DispilY Stltion Troubleshooting Dillll'llmi (Sheet 23 of 29) Troubl.....ooting Diagrams 4-26 Sh •• t 23 No V.s • Remove regulator card. • Change fuse. • Turn power on for 10 sec, then off. • Check F3 again. Change ferro tronsformer (Mod 1, 5.3.2.6, 5.3.2.7) (Iv'tod 2, 5.3.2.8, 5.3.2." __ ---1 • Change fuse. • Disconnect analog power plug. • Turn power on. • Measure + 8V . Ves • Change onalog card (Mod 1,5.3.3.3 Mod 2, 5.3.3.4\ Change ferro transformer (Mod I, 5.3.2.6, 5.3.2.7) (Mod 2,5.3.2.8, 5.3.2.9) • Power on and adjust No (5.2.11. Ves Chonge PC board (5.3.2. 11. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 24 of 29) 4-26 Sheet 23 • • • • • • Turn power off. Reconnect plug PI from PC board. Remove plug P3 from analog card. Change f..... Turn power on for about I minute, then off. Check flMe F1 in primary paw.r box. No • • • • • Replace plug P3 on analog card. Remove lines supplying +5, -+6, +~, and -12 to logic gate. (See FEALD logic page YAOll for connectors.) DO NO T remove plug P2 from low-voltage PC board. Change fuse. Turn power on for about 1 minute, then off. Replace plug P3 on analog cord. Remove push-an connector to pin 5 of HV power IUpply (+~V). e Tum pawer on for about 1 minute, then off. • e Yes • • Use wiring diagram YAO 11 to locate short in wiring 10 logic gote, or ilOlate 10 logic card(s) by removing all cards from gate. If nat in wiring or cards, change logic board. No Change PC board (5.3.2.1) • Change analog card. (Mod 1, • e 5.3.3.3 Change HV pawer suppl y (5.3.2.10) Mad 2, 5.3.3.4) push-an connector to pin 5 HV pawer supply. Power on and adlUlt. R~place (5.2.ll Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 25 of 29) Troubleshooting 0 iagrams 4-27 • Verify all offline functIons are correct • • Swap coaxIal sIgnal cobl. wIth known good devic•. Yes Yes Check cooxial coble from input connector to board. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 26 of 29) No Check that card reader e Press RESET, CLEAR, and RESET keys. • Feed test card into Sheet 28 • Reseat ex>nnector. • Check card reader operations. • Return to customer. Yes No connector. -Pins - -for-next - -check - -are- , - - - - - -- identified by numbers on reoder coble plug assembly. 150Hz) Measure reoder motor resistance between pins A 1 and A2 of reoder cable plug for approx imote Iy 400 ohms. No Measure reoder motor resistance between pins 10 and 24 of reoder cable plug for approximately 400 ohms. Yes Check display station power cabling from card reader ex>nnector to ferro transformer. Refe' to IDR-M 10 Reode-;::MOtorized Theory-MaintenancePar~ Catalog. Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 27 of 29) Troubleshooting Diagrams 4-29 Sheel27 C( No I operotiOr"5 • Relurn 10 cu,tomer. • I No • • • Insert card corrC!ctly • T... sl cord read .. , operations. • Retvf" to customet. • Press RESE T, CL EAR, and RE,ET ~eY'. • Jesl cord reoder • Disconnect reader cable from OIA-N2007, 8(\3, and 008. Set VOM on .5V de Connect minus 1-" l~ac1 on wire formerly attached to N2008. Check Ihe two signal wires for approximateI v .]V ac as lest cord I!xil'! reader. Ye, Retvrq to cvstoMef. Cursor was. in a prolected fiei.:! or under CW'I attrihute character. • Check cord reader cohle signa! co!')nections of 0IA-"<2D07 and B03. • :::heck coble ground 01 01A-N2DOB. Ye, • Connect signal and grl)vr'ld wires .::orredly. • Te,t cad reade' operations. • Returr'" to cudome r . Diagram 4-1. Display Station Troubleshooting Diagrams (Sheet 28 of 29) 4-30 No Refer 10 IDR-M ID ~"ader-Motorized Th';~~ Ports Catalog. Return to customer. CII.... In 10110"'", otdo<' I LVPC Boord (5.3.2.11 2. Ferro transformer (5.3.2.615.3.291 o..ck for repeir after ..chstep. Turn_oil lie....... +34V F..... Mealure , ....tarec:. ~ A/F2-B Mod I 0< 01C1F2-B Mod 2 With ohmme'.' stili connected. remove co,dsiftOIA/A1.nd the keybo.rd connector OIA/Al 21124 one., In • tln\e until Short IS ISOI.ted to c.rd. connector or board No Chock In fol1owl", R........ ohm.....'. ,n_on 10<30 __ _ T.. tu,n _ oil. ChocIl 34VI......'n_ Chongo In 10110wt'" ordlr. 1 An.IOIIcord 2. HV go...., s..pplv a.c:k for f'ePIi" .fte, ooch ' ...........nl. o,do< 1.01A/A1M2cord 2 34 V WIring from tu .. 10 boord. 1000Ie pogo YAOII fo' wire routine. 3 34'0' ont'v on bGo,d s.. It 0IA/A1K8B04 CIIocIIend,_rr 3CV wi"", from L'o'_,suppiV CirCUit boarel to t... hoidet. s.. 1000IcPIfIOVAOII for WIr' routine Troubleshooting Diegrams 4-31 Section 5. Checks, Adjustments, and Removals This section contains all alignment, adjustment, and removal procedures nece~ry to maintain IBM 3277 Display Stations. It also contains service checks and checkout procedures to determine whether adjustments are required and to verify the accuracy of any adjustments made. 5.1 CHECKS 5.1.1 Display Station Test Using Test Pattern 1 A comprehensive test of the display station and all attached features is performed by using diagnostic Test Pattern 1 and the procedures described in the following paragraphs. The step-by-step procedures describe the sequence in which the various operations should be performed and the results expected of each operation. The tests should be performed in the sequence presented, because each test is dependent on data left on the screen from preceding tests. The observations described in paragraph 5.1.1.1 apply to all display stations. Further testing depends on what features are attached to the display station. If a problem is discoverect while performing this operational test, refer to the Symptom I ndex or the Troubleshooting Diagrams to resolve the problem. 5.1.1.1 Initialization and Observations 1. Load Test Pattern 1 on display station being checked. (See paragraph 2.2.1 for instructions for loading Test Pattern 1.) SYSTEM AVAILABLE is the only indicator that should be on after pattern is loaded. 2. Take display station offline by removing control unit signal cable. Jack is located at front of display station, under front cover. Do not turn power off while removing cable or Test Pattern 1 wi" be lost. 3. Compare image on screen with expected image shown in Diagram 2-4. The "NON DISPLAY" field should be blank. Top two rows are displayed in normal intensity, next two rows are displayed in high intensity, and half of last row is displayed in high intensity. 4. Check for only one cursor. Cursor should be in first character position of second row of displayed data. 5. Check quality of displayed image. Image should not be tilted or blurred, and characters should be formed properly with correct inter-row spacing. 6. Vary Brightness control. Set it where high intensity characters have proper brightness. 7. Vary Contrast control. Set it where normal intensity characters contrast with high intensity characters at desired level. 5.1.1.2 Security Keylock Test (Optional Feature) 1. Turn security key off (vertical position). All data should disappear from screen, INPUT INHIBITED indicator should light, and cursor should remain displayed. 2. Turn security key on. Original data should reappear on screen, and INPUT INHIBITED indicator should go out. 5. 1. 1.3 Tests from Keyboard (Optional Feature) Press the RESET key. The display image should appear as shown in Diagram 2-4, with the cursor located under the character C in the second row of displayed data. No indicators should be on. 1. Key in the row of alphabetic characters and the one space exactly as they appear in the row above. All characters should enter correctly, and cursor should move under I after Space bar is pressed. 2. Move cursor under C of CK in second row of displayed data, using ~ (Right) key. 3. Press INS MODE key. INSERT MODE indicator should light. 4. Press A key. Field should now appear A~K. 5. Press FIELD MARK key. (Use B key on Ope.ator Console keyboard.) Field should now appear A; ~K (AB£K). 6. Press C key. The data should not change, but the INPUT INHIBITEQ indicator should come on (in addition to the INSERT MODE indicator, which has remained on.) 7. Press RESET key. Both indicators should go out. 8. Press DEL key. The C should disappear, and the field should now appear A;~ (AB~)' 9. Press +-I key (New Line). Cursor should move under C character in fourth row of displayed data. 10. Enter the special characters as they appear in the row above, shifting where required. Cursor should appear under 0 character after last special character enters. 11. Enter the digits 0 through 9 and the characters, . - and A as they appear in the row above. (On Data Entry keyboards, use the , over * and . over $ keys to enter the , and . characters.) The following results should occur: a. Typewriter and Operator Console keyboards without numeric lock feature - all characters should enter. Checks, Adjustments, and Remova.. 5·1 b. 12. 13. 14. 15. 16. 17. 18. Data Entry keyboard without Ilumeric lock feature - characters, . and - entpr .nnrrnally; the A character enters as < symbol. c. All keyboards with numeric lock feature - characters . and - enter normaHy; keyboard should lock and INPUT INHIBITED should light when, and A keys are pressed. (Use Reset and -+ keys to move cursor from those positions.) Check t (Up), '" (Down), and ~ (Backspace) cursor move keys for proper operation. Check the Typamatic function of the Space bar or any other key with Typamatic.capability. Use the first field in the fourth row of displayed data for this step. Move cursor under first character displayed of test message. Press any alphameric key. INPUT INHIBITED indicator should come on, and character should not enter or display because field is designated as a protected data field. Press RESET key. INPUT INHIBITED indicator should go out. Press ENTER key. INPUT INHIBITED indicator should light, and keyboard should lock. Press RESET key. INPUT INHIBITED indicator should go out, and keyboard should unlock. Note: The following steps check tab, DUP, and new line functions. 19. Press ~ (Tab) key. Cursor should appear under character A in second row of characters. 20. Press DUP key. An asterisk (*) should appear in cursor position, and cursor should move under I of INSERT. (On Operator Console keyboard, use Tab key; cursor should move under I of INSERT, but the asterisk should not appear.) 21. Space one character position. The I should disappear. 22. Press t+- (Backtab) key. Cursor should move back one space to where the I was formerly located. 23. Press Tab key. (Use SKIP key on Data Entry keyboards.) The cursor should appear in the first character position of the fourth row of displayed data. Note: The following steps test the erase and clear functions. 24. Position cursor under character E in second row of displayed data. 25. Press ERASE EOF key. Characters E through Z should disappear, and cursor should not move. 26. Press E RASE I NPUT key. All unprotected data, including keyed-in characters and field that originally appeared as INSERT CK, should disappear from screen. 27. Proceed to paragraph 5.1.1.4 if display station being tested has a selector light-pen attached. If a pen is not attached, press CLEAR key. All characters remaining 5-2 on screen should disappear, and cursor shou'd reappear in first character position in first row. Press RESET key. 28. Proceed to paragraph 5.1.1.5 if display station has an operator identification card reader attached. If a card reader is not attached, test is completed. Turn power off, and reconnect control unit signal cable. 5.1.1.4 Selector Light-Pen Tests (Optional Feature) 1. Fire pen on detectable field that has c:J Question mark (7) as its first character. Question mark should change to a greater-than (» symbol. Remainder of field should not change. 2. Fire pen again on the field. The greater-than symbol should change back to a Question mark. Remainder of field should not change. 3. Fire pen on next detectable field that has a greater-than symbol as its first character. The greater-than symbol should change to a Question mark. Remainder of field should not change. 4. Fire pen again on same field. Ouestion mark should change back to a greater-than symbol. Remainder of field shou Id not change. 5. Press CLEAR key. All characters on screen should disappear, and cursor shou Id move to character location O. Press RESET key. 6. Proceed to paragraph 5.1.1.5 if display station being tested has an operator identification card reader attached. If a card reader is not attached, test is completed. Turn power off, and reconnect control unit signal cable. 5. 1. 1.5 Operator Identification (Optional Feature) Card Reader Tests 1. Key in a few characters on the screen. 2. Return cursor to character position 1. (Do not use CLEAR key.) 3. Read in card reader test card (PN 2143816). The following events should occur: a. Keyed-in data disappears from screen. b. Cursor moves 40 character positions. c. INPUT INHIBITED indicator comes on and stays on. If cursor does not move 40 spaces, read-in operation was u nsuccessfu I. 4. Tests are now completed. Turn power off, and reconnect control unit signal cable. 5.1.2 Display Station Operational Test (without Test Pattern 1) The following test sequence is a Quick checkout procedure that can be used as an offline display station reliability test. This procedure tests display station circuitry extensively, but is not as comprehensive as the procedure described in paragraph 5.1.1. It can be used as a Quick checkout to verify correct operation after maintenance is performed. Perform the steps in sequence for most effective results. 1. Turn power off. 2. Take display station offline by removing coaxial signal cable from display station I/O jack. Jack is located at front of display station. Front cover must be removed for access to it. 3. Turn power on. Within 15 seconds, cursor should appear on screen at character location O. No indicators should be lighted. 4. Press -+ (Right) key, and hold it down. Cursor should move through each character location in the row. After reaching last character location, cursor should appear in first character location in second row. 5. Exercise t (Up), (Down), +-' (New Line), and +(Left) cursor move keys. Observe that each key performs its operation correctly. 6. Press several alphameric keys in succession. The corres· ponding characters should display, and cursor should move one space as each new character appears. 7. Key in a complete row of characters. When last character of row enters, cursor should appear in first character position of next row. 8. Press an alphameric key. Char.acter should appear in cursor location, and cursor should advance one space. 9. Exercise both upper and lower shift of all keys. Observe display screen as each key is pressed, checking that proper characters enter. 10. Exercise Typamatic function of each Typamatic key. 11. Move cursor into last row, and key in several alphameric chararacters. 12. Backspace cursor near middle of group of characters just entered. 13. Press INS MODE key. INSERT MODE indicator should light. 14. Press Space bar enough times to cause characters at right of cursor to move to end of row and wrap around to first row. 15. Press RESET key. INSERT MODE indicator should go out. 16. Delete several characters using DEL key. Character in cursor position should disappear, and characters in same row at right of cursor should move left one character position each time DE L is pressed. 17. Move cursor to middle of a row of characters. 18. Press ERASE EOF key. Characters from cursor position through last position on screen should erase, and cursor should not move. 19. Press ERASE INPUT key~ All characters should erase, and cursor should move to location O. 20. Enter several alphameric characters as in step 6. 21. If display station has the security key lock feature, turn key off. Characters should disappear from screen, INPUT INHIBITED should light, and cursor should remain displayed. 22. Turn security key on. Original data should reappear on screen, and INPUT INHIBITED should go out. + 23. Press CLEAR key, then RESET key. All characters should disappear from· screen, and cursor should reappear in character location· O. 24. Press Backspace key two times. 25. Press any character key. Audible alarm (feature) should sound when key is pressed if feature is installed. 26. If an operator identification card reader is attached, proceed to step 27. Turn power off, and reconnect control unit signal cable if a card reader is not attached. 27. Press CLEAR key, RESET key, then enter several alphameric characters as in step 6. 28. Return cursor to location 0 using +- (Left) key. 29. Read in card reader test card (PN 2143816). 30. Observe that INPUT INHIBITED indicator comes on, cursor moves 40 spaces, and keyed-in data disappears from screen as card passes through reader. 31. If cursor does not move 40 spaces, read-in operation was unsuccessful. 32. Offline tests are completed. Turn power off, and reconnect control unit signal cable. 5.1.3 Voltage Clecks A ferroresonant transformer (ferro) with a 110V ac primary and multiple secondary taps provides all display station voltages. (World Trade Corporation display stations use a ferro with a tapped primary winding.) The ferro is protected by fuse F 1 in series with its primary winding. F 1 is located in the prime power box. Display station voltages consist of low dc voltages, high dc voltages, and 6.3V ac CRT filament voltage. These voltages can be checked at the LV printed circuit (PC) board or at Terminal Board 1 (TB1). Refer to the Symptom Index and Troubleshooting Diagrams if a voltage is incorrect or is missing. 5.1.3.1 Low-Voltage DC Checks Modell: For +8V and -12V, measure the low dc voltages at the capacitor screws on the LV printed circuit board. Diagram 7-9 shows the location and the polarity of the capacitor screws. Remove the left side cover for access to the circuit board. For +5V and +34V, measure the voltages at the fuse holders at A/F 1-B for +5V and A/F2-B for +34V (Diagram 7-3). Model 2: For +8V and -12V, measure the low dc voltages through the access holes in the shield that covers the printed circuit board. A line with arrowheads at each end designates the pairs of terminals associated with each voltage. For +5V and +34V, measure the voltages at the fuse holders at 01C/F 1-8 for +5V and 01C/F2-B for +34V (Diagram 7-E). Diagram 7-10 illustrates the PC board shield. Remove the front cover for access to the circuit board. Observe the polarities of the terminals, and probe with the correct test leads to prevent damage to the meter. The following voltages can be measured at the PC board: Checks, Adjustments, and Removals 5-3 +5V ± 10% (This voltage is protected by fuse at A/F 1 (Modell) Diagram 7-3 and 01C/F 1 (Model 2) Diagram 7-5.) +8V ±12% (This voltage is protected by fuse F2 on PC board.) +34V ±10% (This voltage is protected by fuse at A/F2 (Modell), Diagram 7-3 and 01C/F2 (Model 2), Diagram 7-5.) -18V (This voltage is fuse-protected by fuse F3 on PC board and is the input to the -12V regulator card. If this voltage is missing, the -12V will also be missing.) -12V ±4% arc-suppression circuitry as listed below. Arc-suppression circuitry is located on the arc-suppression board (Zl, Diagram 7-15) on Model 1 display stations and on the voltage distribution board (TB1, Diagram 7-11) on Model 2 display stations. Visual Checks: 1. Check for bent, broken, or missing wires. 2. Check for bent capacitor leads that are too close to other components and could cause arcing. 3. Check for broken capacitors or other components showing obvious damage. Model 1 Resistance Checks: 5.1.3.2 High-Voltage Check The only high voltage that should be checked is the +400V dc (which is derived from the HV power supply). If this voltage is correct, the other high voltages for the CRT should also be corre~t. Because the +400V is a low-current supply, it is impossible to obtain an accurate measurement with the standard voltmeter. Check the arc-suppression circuitry whenever HV troubles occur. 1. Turn power off. 2. Set voltmeter selector switch to a position that will measure up to +400V dc. 3. Connect minus (-) meter lead on any dc return terminal. 4. Connect plus (+) meter lead to HV power supply terminal 2 (Diagram 7-14) by sliding push-on connector back slightly. 5. Turn power on. 6. Check for a meter indication of +400V ±50V dc. (Because this voltage is a low-current supply, it is impossible to measure the +400V dc operating voltage with the IBM meter; therefore, the wide range of ±50V is given.) If voltage is correct, turn power off, remove test leads from term ina Is, and check the arc-suppression circuitry (paragraph 5.1.3.3). If voltage is incorrect, proceed with steps 7 -10. 7. Turn power off. 8. Remove push-on connectors from HV power supply terminals 1 and 2. 9. Turn power on. 10. Check again for +400V ±50V dc on terminal 2. If voltage is correct, turn power off, remove test leads from terminals, reconnect power supply push-on connectors, and check the arc-suppression circuitry (paragraph 5.1.3.3). If voltage is still incorrect, change the HV power supply (paragraph 5.3.2.10). 5.1.3.3 Arc-Suppression Check A defective arc-suppression circuit may appear as a defective HV power supply or analog card. If excessive trouble is experienced with either of the two assemblies, check the 5-4 1. Turn power off. 2. Remove arc-suppression board from its socket. 3. With the CE VOM, check between the following pairs of pins on the arc-suppression board for the resistances specified: E7 and E13 - Infinity E9 and E13 - 1 Megohm E7 and E14 - Infinity El0 and E14 - 1 Megohm 4. Replace the arc-suppression board if the resistances are not correct. Model 2 Resistance Checks: 1. Turn power off. 2. Disconnect wires from voltage distribution board terminals 12, 13, 14, and 15. 3. With the CE YOM, check between the following pairs of pins on the voltage distribution board for the resistances specified: 12 and 13 - 1 Megohm 13 and 16 - Infinity 14 and 16 - Infinity 14 and 15 - 1 Megohm 4. Replace voltage distribution board if the resistances are not correct. If the above checks do not reveal an obvious fault in the arc-suppression circuit and if excessive trouble persists, change the arc-suppression board (Model 1) or the voltage distribution board (Model 2). Return to Diagram 4-1, sheet 4, if the checks were performed as a result of instructions in the troubleshooting diagrams. 5.1.3.4 6.3VAC Check The CRT filament voltage of 6.3V ac (±10%) is the only ac voltage used in the display station. A quick check to determine if 6.3V ac is present is to look for a glowing filament at the back of the CRT ne~k, near the tube socket. The CRT cone shield must be removed to see filament (par. 5.3.3.2, steps 1-3). This voltage is protected by fuse F 1 located on the LV PC board. 1. Turn power off. 2. Set voltmeter selector switch to a position that will measure 6.3V ac. 3. Remove fuse Fl. (Remove shield for access on Mode! 2 display stations.) 4. Connect a meter lead on each end of fuse holder. 5. Tum power on. 6. Check for a meter indication of 6.3V ac. 7. Turn power off, and remove meter leads from fuse holder. 8. Reinstall fuse and shield (if removed). 5.1.3.5 High-Voltage Power Supply Check 1. Turn power off. 2. Remove HV power supply leads 3 (UV) and 4 (DC retu rn). See Diagram 7 -14. 3. Set CE VOM selector switch to RX10 position. 4. Measure resistance between HV power supply pins 3 and 4. 5. Reverse meter leads and measure again. 6. Replace HV power supply (par. 5.3.2.10) if readings in step 4 or 5 indicate a shorted or open condition. 5.1.4 Keyboard Checks Two different style keyboards may be found on IBM 3277 Display Stations. Both are identical in operation and vary only slightly in external appearance. The rows of keys on Type A" keyboards have an even slope downward from top to bottom. The rows of keys on Type "B" keyboards are slightly concave. The two types can be distinguished with the keyboard cover removed by observing the location and type of cable connection and the location of the +5V regulator (large transistor on heat sink). The Type A keyboard cable plugs into the rear edge of the printed circuit board, and the regulator is located in the left corner of the circuit board. The Type B keyboard cable plugs into a 24-pin SL T connector which is mounted in the left corner of the circuit board, and the regulator is located in the right corner of the circu it board. II I I The following paragraphs contain check procedures which can be used to isolate keyboard problems. When the check procedure differs for the different keyboard types (A and B), the differences are noted. Ensure that the correct procedure is used. Keyboard problems can be isolated to one of three possible areas: 1. External to the keyboard. 2. A FRU in the keyboard. 3. The keyboard assembly. (Type A assembly consists of circuit board with key modules; Type B assembly consists of circuit board and electronics assembly with key modules in an all-keys assembly.) Problems external to the keyboard should be diagnosed as outlined in the Troubleshooting Diagrams. Keyboard FRUs include keybuttons, switch modules, spacebar assembly, support modules (Type A only). circuit board and elec- tronics assemblv (Type B only), and the audible response device. Do not attempt to repair any other keyboard units. While performing the following checks, the keyboard assembly' should be visually inspected for shorts or grounds that could cause erratic operation or erroneous results. A faulty keyboard assembly should be replaced with a good one. A faulty Type A assembly should be returned to the factory if it is less than one year old. The date code is marked on Type A keyboard assemblies by week (01-52) and year. 5.1.4.1 Voltages Type A Keyboards (See Diagrams 7-7 and 7-8 for Type A keyboard locations): 1. Check for -12V dc between KB 1 pins Z(-) and X (ground). 2. Check for +8V dc between KB1 pins V(+) and X (ground). 3. Check for +5V dc across keyboard capacitor C1. This voltage is developed (by the voltage regulator on the keyboard assembly) from the display station +8V dc power supply. Replace the keyboard assembly if the +8V dc is correct and the +5V dc is not correct. Type 8 Keyboards (See Diagram 7-19 for Type B keyboard locations) : 1. Check for -12V dc between KB 1 pin 002 (-) and 008 (ground). 2. Check for +8V dc on one of the voltage regulator terminals (under the circuit board and electronics assembly) and +5V dc on the other terminal. Reference the meter negative (-) lead to test pin 008. Input to the regulator is +8V dc, and the output is +5V dc. Replace circuit board and electronics assembly if the +8V dc is correct and the +5V dc is incorrect. Check KB 1 connector and display station power supply if +8V and +5V are incorrect. 5.1.4.2 Key Module and Encoding - Type A Keyboards Only (Diagram 6-11) Correctly functioning key modules present two active (2.5V dc minimum) input lines to the keyboard assembly encoder. With two and only two active inputs present, the encoder generates the strobe signal and the encoded character output. This procedure checks that the strobe s;gnal is generated properly, and the key modules activate only two inputs to the encoder. Replace the key module if it is found to be defective. Replace the keyboard assembly if the encoder or the printed circuit board is defective. Strobe check: 1. Set selector switch on vol t-ohmmeter to a position that will accurately measure 5V dc. 2. Place minus (-) meter lead on KB 1 tab X (ground). 3. Place plus (+) meter lead on KB 1 tab R (strobe signal). Checks, Adjustments. and Removals 5,),) 4. With no keys pressed, the meter should indicate at least 2.5V. If the meter indicates 0.6V or lower, proceed to step 7. 5. Press and hold one alphameric key. The meter should indicate less than 0.6V. If the meter indicates 2.5V or hi~er, replace the keyboard assembly. 6. Press and hold two alphameric keys simultaneously. The meter should indicate at least 2.5V. Proceed to paragraph 5.1.4.3 if the preceding results are correct. O.6V (or lower) with no keys pressed: 7. With meter leads attached as in steps 2 and 3, press two 8. 9. 10. 11. 12. 13. 14. alphameric keys simultaneously. If meter indicates 0.6V or lower, replace keyboard assembly. Probe KB1 pins D, E, F, H, J, K, L, M, and N (bits 0-7 and Parity, Diagram 7-8) with no keys pressed. Note bit configuration of encoded output. With logic probe, a red indication is a 1 bit, and a green indication is a 0 bit. With voltmeter, greater than 2.5V is a 1 bit, and less than 0.6V is a 0 bit. Find code in Diagram 6-5 or 6-6 that corresponds to bit configuration observed in step 9. Check center two lead frame terminals of suspected module for 2.5V or higher. (Keyboard assembly must be removed from bottom pan for this voltage check. See paragraph 5.3.5.3.) Replace defective module if 2.5V or higher is measured on both center terminals in step 11. If only one terminal measures 2.5V or higher and other measures 0.6V or less, recheck steps 8 through 11. If same results are obtained, replace keyboard assembly. Replace keyboard assembly if less than 0.6V is measured in step 11. 5.1.4.3 Output Codes 0 U09 6 7 Parity M11 5-6 Keyboard Bit S05 S08 S09 S02 U05 M10 S13 5.1.4.4 Shift Key Modules - Type A Keyboards Only Two SHIFT keys and the shift LOCK key (NUMERIC and NUM LOCK keys on data entry keyboards) generate an input signal to the keyboard assembly encoder. The encoder generates upshift character codes of the characters appearing on the top half of the keyboard keys. The following procedure isolates a shift module failure. 1. Set volt-ohmmeter selector switch to a position that will accurately measure up to +5V dc. 2. Place minus (-) meter lead on KB 1 tab X (ground). 3. Check all three shift keys individually for 2.5V (minimum) on both center leads of the corresponding key module when each key is pressed and for O.6V (maximum) when key is restored. 4. Replace shift module that fails to generate proper levels on both leads. 5. If shift module generates proper levels, and keyboard generates incorrectly shifted characters (5.1.4.3), replace keyboard assembly. 5. 1.4.5 Spacebar Assembly Mechanical Checks The spacebar assembly and mountings should be checked for easy motion and freedom from binds. The spacebar should depress and return to the restored position without drag or binds. Replace the spacebar assembly if binds, broken mountings, or bent components are discovered. It may not be necessary to replace the spacebar module (actuator) if the problem is mechanical. 5.2 ADJUSTMENTS The unshifted and shifted codes for a" keys on both type keyboards can be checked by the following procedure, which uses the logic probe and Diayram 6-5, 6-6, or 6-7. 1. Press and release desired key. Hold SHIFT (NUMERIC on data entry keyboards) key down while pressing key if desired character is on top half of keybutton. 2. Probe pins listed below with logic probe, and note bit configuration observed. A red (UP} indication is a 1 bit, and a green (DOWN) indication is a 0 bit. Pin (lA 1-B2) 3. Compare bit configuration observed in step 2 with configuration for desired character shown in Diagram 6-5 or 6-6. '} .., oj 4 5 Adjustment procedures for the IBM 3277 Display Station should be performed after it is established that all operating voltages are correct. Paragraph 5.1.3 details the voltage checkout procedure. 5.2.1 Display Image Adjustments A test pattern generated by the diagnostic program provides the display image to be used during image adjustment. Test Pattern 2 is used to adjust the Model 1 display image, and Test Pattern 3 is used to adjust the Model 2 display image. The procedure for displaying the required test pattern is described in paragraph 2.2. If the program-generated test pattern is not used, the test pattern image must be keyed in from the keyboard. Diagrams 2-5 and 2-6 show Test Patterns 2 and 3, respectively. Adjustments should be performed in the sequence listed. However, if only minor touchup adjustment is required, analog card adjustments can be made separately. Use Diagrams 7-1 throu~ 7-6 to locate the adjustments specified in the following procedu res. The following equipment is required. AI ignment mask: Model 1 - PN 2577899 (Diagram 2-2) Model 2 - PN 2565170 (Diagram 2-3) Screwdriver (small blade) SL T backpanel jumper 2. 3. 5.2. 1. 1 Brightness 4. Note: The Brightness control is the outer knob on the OF F-PUSH switch. 5. Adjust as follows: 1. With Brightness control fully counterclockwise, no image should be visible. 2. At full clockwise rotation, raster may become visible. Image may bloom and become excessively bright for comfortable viewing if Contrast control (inner knob) is fully counterclockwise. 3. Set Brightness control at point that produces best display image for comfortable viewing. 5.2.1.2 Contrast Note: Test Pattern 1 or a customer program that contains dual brightness fields must be loaded to properly adjust the Contrast control. The Contrast control is the inner knob on the OFF-PUSH switch. Adjust as follows: 1. With Contrast control fully counterclockwise, contrast between normal and bright fields should be approximatelyequal. 2. At full clockwise rotation, contrast should be maximum. Normal brightness characters may disappear from screen if Brightness control (outer knob) is set at a low level. 3. Set Contrast control for comfortable viewing, with desired amount of contrast between normal and bright fields. stations. The yoke shield must be on the yoke before makin J the following adjustments. Short together the three test pins on analog card. Use a clip or bare wire. (Pins are located between CHAR HEIGHT potentiometer and SWEEP INDIC neon.) This jumper disables vertical deflection and produces a single horizontal trace across approximate middle of screen. Loosen yoke clamp and rotate yoke until horizontal trace is parallel to, or coincides with, horizontal lines on alignment mask. Ensure that yoke is firmly seated against CRT bell while maintaining horizontal alignment obtained in step 3. Tighten yoke clamp loosened in step 3. 5.2.1.5 Magnetic Centering Rings 1. Leave vertical deflection grounding jumper (connected in step 2 of paragraph 5.2.1.4) attached and the alignment mask in place for this adjustment. 2. Loosen cone shield retaining screw, rotate cone counterclockwise until locking tabs disengage, and slide cone back 1 to 1-1/2 inches to expose tabs on centering rings. 3. Using tabs on centering rings, rotate rings until horizontal trace passes through geometric center of screen. (Geometric center is indicated by crossed lines in center of alignment mask. Vertical center is indicated by line B on the Model 1 mask and by line D on the Model 2 mask. Horizontal center is judged by comparing ends of trace to vertical lines at edges of mask.) 4. Reinstall cone shield. 5. Proceed to paragraph 5.2.1.6 (Model 1 analog card adjustments) or to paragraph 5.2.1.7 (Model 2 analog card adjustments). 5.2.1.6 Modell Analog Card Adjustments The procedures described in the following paragraphs apply only to the IBM 3277 Model 1 Display Stations. See paragraph 5.2.1.7 for Model 2 analog card adjustment procedures. These procedures require that the Model 1 alignment mask (PN 2577899) be positioned against the face of the CRT. 5.2.1.3 Focus Adjust the Focus potentiometer to the point that produces the sharpest display image. Observe ~Iosely the characters at the center of the screen and those at the edges of the screen. Set the potentiometer where the best focus over the entire CRT is achieved. The Focus potentiometer is on the HV power supply. 5.2.1.4 Yoke 1. Place proper alignment mask in position against face of CRT. Note: Use mask PN 2577899 to adjust Model 1 display stations and mask PN 2565170 to adjust Model 2 display Model 1 Horizontal Width: The vertical deflection grounding jumper (connected in step 2 of paragraph 5.2.1.4) should remain attached during this adjustment. Proceed as follows: 1. Adjust Horizontal Width potentiometer so that ends of horizontal trace on screen coincide with vertical lines C and E on alignment mask. When adjusted correctly, trace should be 6.4 inches ±1/16 inch. 2. Check to make sure that horizontal trace still passes through geometric center of CRT (Line B). Readjust centering rings as described in paragraph 5.2.1.5 if it is necessary to move trace back through center of CRT. 3. Remove vertical deflection grounding jumper. Checks, Adjustments, and Removals 5-7 that top trace of first character row falls within line A marked on alignment mask. 3. Remove vertical skip disabling jumper. Display image should appear nearly normal, with inter-row spacing. Overall image may be too large or too small. Model 1 Character Height: Adjust Character Height poten- Model 2 Inter-Row Spacing: Adjust Row Spacing poten- tiometer so that bottom trace of characters in last row falls within line 0 of alignment mask. When adjusted correctly, overall height of display image should be 3.9 inches. tiometer so that bottom trace of characters in last row falls within line F on alignment mask. When adjusted correctly, overall height of image should be approximately 8.0 inches from line B to line F. Model 1 Top Margin: Adjust Top Margin potentiometer so Model 1 Linearity: After completing the yoke, centering ring, and analog card adjustments, check that 20th and 21 st characters on sixth and seventh rows fall within rectangle H at center of alignment mask. Test Pattern 2 provides characters in these four locations. Recheck preceding adjustments if this specification is not met. Model 2 Linearity: After completing yoke, centering ring, and analog card adjustments, check that 40th and 41st characters on 12th and 13th rows fall within rectangle M on alignment mask. Test Pattern 3 provides characters in these four locations. Recheck preceding adjustments if this specification is not met. 5.2.1.7 Model 2 Analog Card Adjustments The procedures described in the foil owing paragraphs apply to Model 2 display stations only. (See paragraph 5.2.1.6 for the Model 1 analog card adjustment procedures.) The following procedures require that the Model 2 alignment mask (PN 2565170) be in place at the face of the CRT and Test Pattern 3 be displayed. 2 Horizontal Width: The vertical deflection grounding jumper (connected in step 2 of paragraph 5.2.1.4) should remain attached during this adjustment. Proceed as follows: 1. Adjust Horizontal Width potentiometer so that ends of horizontal trace on screen coincide with lines E and G on alignment mask. When adjusted correctly, trace should be 10.5 inches. 2. Check to make sure that horizontal trace still passes through geometric center of CRT (line 0). Readjust centering rings as described in paragraph 5.2.1.5 if it is necessary to move trace back through center of CRT. 3. Remove vertical deflection grounding jumper. Model Model 2 Top Margin: 1. Connect a jumper between logic board pin A lJ2M03 and ground (any 008 pin). This jumper disables vertical skip circuit, causing i:1ter-row spacing to disappear and display image to gather toward top of screen. 2. Adjust Top Margin potentiometer so that top trace of first character row falls within center of line A (marked on alignment mask). Model 2 Character Height: 1. Leave vertical skip disabling jumper attached for this adjustment. 2. Adjust Character Hei~t potentiometer so that bottom trace of characters in last row coincides with center of line C on alignment mask. When adjusted correctly, overall height of display image should be 3.3 inches from line A to line C. 5-8 5.2.2 -12V Regulator Card This adjustment should be performed when the -12V regulator card is replaced or when a voltage check shows that -12V is not at Its nominal value. Voltage measurements are made on TB 1. TB 1 is located on the right side frame in Model 1 display stations and is under the left side of the CRT in Model 2 display stations. 1. Set volt-ohmmeter selector switch to a position that will accurately measure 12V dc. 2. Attach meter plus (+) lead to a dc return (-) terminal on TB1. 3. Attach meter minus (-) lead to the -12V terminal on TB1. 4. Adjust potentiometer on -12V regulator card. Use a small screwdriver. Set potentiometer so voltmeter shows 12V. 5. Remove meter leads from TB 1. 5.2.3 OFF-PUSH Switch (Model 2 Only) This adjustment should be made after replacing the prime power box or switch actuator mechanism. Ensure that the upper chassis is seated properly on the lower chassis, the chassis clamps are latched, and power is removed before proceeding. Use Diagram 5-1 to locate the components specified in this adjustment. 1. Loosen the following components: a. Front control cable clamp. b. Rear control cable clamp. c. Control wire setscrew. d. Actuator bracket mounting screw. 2. Position control assembly flush with the rear edge of rear control cable clamp. 3. Tighten rear control cable clamp. 4. Adjust actuator mounting bracket (front to rear) to center actuator over power switch plungers. 5. Tighten actuator mounting bracket. 6. Tighten front control cable clamp. Rear Control Cable Clamp (Flush Here) Set Screw (Access Hole For Side) Actuator Actuotor Mounting Bracket Power Switch Plungers (2) Center Diagram 5·1. OFF-PUSH Switch Adjustment 7. Pull OFF-PUSH switch fully forward to the on position. Slider should be against the stop ring. 8. Press down and hold actuator so power switch plungers are fully activated. 9. Tighten control wire setscrew. (Avoid overtightening setscrew. Overtightening will cause control wire to bend and prevent proper operation.) 10. Activate OFF-PUSH switch to check that slider remains forward against stop ring with power switch plungers fully depressed. Repeat steps 8 and 9 if these conditions are not met. 5.3 REMOVALS The following paragraphs describe removal and replacement procedures for IBM 3277 Display Station FRUs. Where the procedure for removing and replacing a unit in the Modell display station differs from the procedure used with the Model 2 display station, a separate paragraph describing the unique procedure is presented. All removal and replacement procedures require that the desired unit has been made accessible by the removal of necessary cOIIers and made safe by the removal of power. The top cover can be left on the display station while performing most maintenance procedures. This provides a degree of safety by keeping the CRT covered. 5.3.1 Covers 5.3. 1. 1 Model 1 Cover Removal 1. Front Cover: Pull out on bottom edge. Note: Security key must be removed from lock before removing right-side cover. 2. Side Covers: Insert a stiff card or badge in slot in grillwork at edge of top cover to unlatch side cover. 3. Top/Rear Center Cover: Release the four quickdisconnect fasteners that hold combination top/rear center cover to frame. Checks, Adjustments, and Removals 5-9 5.3.1.2 Model 2 Cover Removal 5.3.2.3 AC Capacitor 1. Front Cover: Push down on latch (accessible at center underside of cover). The cover falls away from base assembly at top while pivoting on two guide pins at bottom. Lift cover off guide pins. 2. Side Covers: Security key must be removed from lock before removing right-side cover. Pull frontmost stud (under front of side cover) toward front of display. When stud reaches limit of travel, pivot rear edge of cover slightly away from base and top cover simultaneously. Lift cover clear of display station. WTC side covers use a rear retainer spring that blocks travel of the frontmost stud. Release retainer spring by inserting screwdriver in spring and twisting while pulling on stud. 3. Top Cover: Top cover can be removed only after both side covers are removed. Pull out spring-loaded knobs at lower right and lower left of top cover and pivot up. Pull top cover back slightly to disengage it from guides in CRT bezel. Carefully lift cover off display station. 1. Remove rubber boot from top of capacitor, and slide back on wire leads. 2. Holding insulated handle of a screwdriver, short out capacitor terminals with metal shaft of screwdriver to ensure that capacitor is fully discharged. 3. Pull off the two leads from terminals at top of capacitor. 4. Pull capacitor from spring holder. 5. Replace in reverse order. 5.3.2.4 Model 1 Prime Power Box Note: All power component removal and replacement procedures must be performed with power turned off and with the power cord removed from the wall or from the input jack at the display station. 1. Unplug line cord from line cord jack if it was not previously removed. 2. Unplug two cable connectors plugged into prime power box. (Three cable connectors must be removed if an operator identification card reader is attached on 60-Hz units.) 3. Pull Brightness and Contrast knobs from OF F-PUSH switch. 4. Remove the two screws holding prime power box to frame. 5. Replace in reverse order. 6. If a new prime power box is being installed, Brightness and Contrast knobs from the old box must be installed on the new one. 5.3.2. 1 Low- Voltage Power Supply Assembly 5.3.2.5 Model 2 Prime Power Box 1. (This step applies to Model 2 display stations only.) Remove shield covering printed circuit (PC) board by prying through slot along right edge of shield. 2. Disconnect the two cable connectors plugged into board. 3. Disconnect wiring from +5V screw and +5V return screw (Diagram 7-9). 1. Unplug cable connector plugged into rear of box. (Two cable connectors must be removed if an operator identification card reader is attached on 60-Hz units.) 2. Unplug line cord from line cord jack if it was not previously removed. 3. Remove the two screws holding prime power box to frame. 4. Remove assembly from machine. 5. Replace in reverse order. 6. When replacing box, be sure that the on-off switches protruding from top of box are positioned under switch linkage. 7. Adjust position of box so switch plungers depress to within 1/32" of switch body with OFF-PUSH switch pulled out. 5.3.2 Power Components Note: For model 1 the wire attached to the +5V return screw is part of an optional change and mayor may not be installed. 4. Remove screw holding assembly to frame. (The screw is located in center bottom of PC board bracket.) 5. Slide assembly from machine. 6. Replace in reverse order. If a new assembly is being installed, remove -12V regulator card and replace in new assembly per paragraph 5.3.2.2. 5.3.2.2 -12V Regulator Card 1. Lift plastic retainer, and pull -12V regulator card from socket in same manner as an SMS card is removed from a card socket. 2. Replace card by lifting plastic retainer and sliding card into the SMS socket. 3, Perform -12V regulator card adjustment (paragraph 5.2.2), 5-10 5.3.2.6 Model 1 Ferro Transformer (60 Hz) 1. Unplug ferro transformer cable that plugs into LV power supply printed circuit board. 2. Unplug ferro transformer cable that plugs into prime power box. 3. Remove the two wires from ac capacitor. 4. Remove rear screw that holds transformer to base chassis. 5. Remove front holding screw. 6. Lift transformer clear of the machine. 7. Replace in reverse order. 5.3.2.7 Model 1 Ferro Transformer (50 Hz) ,. Unplug ferro transformer cable that plugs into LV power supply printed circuit board. 2. Remove the two wires from ac capacitor. 3. Refer to Diagram 8-1. Disconnect two wires leading from ferro term inal block (TB 1) to prime power box by turning cam screw counterclockwise only. Note where wires were terminated (for later reconnection). 4. If a card reader is attached, disconnect two wires leading from ferro terminal block to card reader I/O connector. Note where wires were terminated (for later reconnection). 5. Remove rear screw that holds transformer to base chassis. 6. Remove front holding screw. 7. Lift transformer clear of mach ine. 8. Replace in reverse order. When connecting wires to terminal block, cam screw must be turned clockwise. 5.3.2.8 Model 2 Ferro Transformer (60 Hz) 1. Disconnect LV cable connector (J2) between the two chassis. 2. Remove all I/O connectors (keyboard, card reader, I/O). 3. If a card reader is attached, unplug cable from rear of prime power box. 4. If a selector-pen is attached, remove cable from clip at lower right rear of frame. 5. Release the two clamps at sides of chassis that hold upper chassis to base chassis. 6. Release spring catches on rear guides, and slide upper chassis slightly to front to disengage the two rear guides. 7. Lift upper chassis off base chassis, and place upper chassis on a flat surface. 8. Remove ac capacitor per paragraph 5.3.2.3. 9. Remove screw holding ferro cover, and remove cover. 10. Disconnect the two cable connectors leading from ferro transformers. 11. Remove the two screws holding ferro to base chassis. 12. Slide transformer out of housing and clear of chassis. 13. Replace in reverse order. 5.3.2.9 Model 2 Ferro Transformer (50 Hz) 1. Disconnect LV cable connector (J2) between the two chassis. 2. Remove all I/O connectors (keyboard, card reader, I/O). 3. If a card reader is attached, unplug cable plugged in ferro transformer cover. 4. If a selector-pen is attached, remove cable from clip in lower right rear of chassis. 5. Release the two clamps at side of chassis holding upper chassis to base chassis. 6. Release spring catches on rear guides, and slide upper chassis slightly to front to disengage the two rear guides. 7. Lift upper chassis off base chassis, and place upper chassis on a flat surface. 8. Remove ac capacitor per paragraph 5.3.2.3. 9. If a card reader is attached, remove access cover on ferro cover over ferro terminal block (Diagram 8-1), and disconnect two wires leading from terminal block to connector on ferro cover by turning cam screw counterclockwise only. Note where leads were terminaled (for later reinstallation). 10. Remove screw holding ferro cover and remove cover. 11. Disconnect the two wires leading from ferro terminal block to prime power box by turning cam screw counterclockwise only. Note where leads are terminated for later reinstallation. 12. Remove the two screws holding ferro to base chassis. 13. Slide transformer out of housing and clear of chassis. 14. Replace in reverse order. When connecting wires to terminal block, cam screw must be turned clockwise. 5.3.2.10 High- Voltage Power Supply 1. Disconnect anode lead from CRT. 2. Unplug input cable at lower edge of HV assembly. Note where leads are terminated (for later reconnection). 3. Remove mounting screw. 4. Lift power supply clear of machine. 5. Replace in reverse order. Ensure that anode lead is firmly seated in CRT bell. 5.3.2.11 1. 2. 3. 4. Fuses Determine which fuse is blown. Replace blown fuse with another fuse of same value. Turn power on. Check that fuse does not blow again. Note: The +8V, -12V, and 6.3V ac fuses are held in fuse clips located on the LV power supply printed-circuit board. Remove plastic shield over the LV power supply board on Model 2 display stations to replace these fuses. The ac line fuse is located in a screw-type fuse holder on the prime power box. The +5V and +34 V fuses are located at: +5V (Model 1): +34V (Model 1): +5V (Model 2): +34 V (Model 2): A/F 1 A/F2 01 elF 1 01 C/F2 I Diagram 7-3.1 Diagram 7-5.1 5.3.3 Analog Components 5.3_3.1 CRT DANGER All persons handling a CRT or who are near an exposed CRT under vacuum must wear safety glasses and long-sleeved garments. I Checks, Adjustments, and Removals 5-11 The yoke and shield assemblies are removd \(T\mA0\mmm ~ ~WWWWUUl!UWWUJ ~ ~ ~ ENTER DEL Q Pf4 r=::-lnm("\f=\mmmmm ~ ~ L::JWWWWWl!UV!JWLJ ( L.::.-J ) ) Data Entry Keyboard 8 c:JGJGJCDCD :~: GOmGGG GG r+\0m" L!U neD" l!Jl!UWWW f=\mmmmGr-=-l r::::lG lQj~ E T PF4 ~ ~ G ~f<\l>\nmAmmmm ~ ~WWWWUUl!UWWUJ PF5 ~ r=::-l(%"\mn~mmmmmo~ Q ~ L:::-JwW W W W l!UV!VWLJ . L.::.-J ( 'BET • J ) Typamatic Keys Diagram 6-4. Data Entry Keyboards ( o Numeric Keys [ENTER) DEL Typewriter and Operator Console Keyboard Codes Graphic L U ERASE INPUT ERASE EOF RESET DUP CLEAR INS MODE DEL TEST REa FIELD MARK ENTER PA1 PA2 t .j. -+ (2 Keys) ~ 14- 1 I •# 2 3 4 5 $ "C 6 7 & 8 9 o + a a w E E R w R T y T y U I U I o o P I A ....,P 5 S o D F G H J K L A F G H J K L z x z x c c V V B B N N M M < > ? PF1 PF2 PF3 PF4 PF5 PF6 PF7 PF8 PF9 PF10 PF11 PF12 Upper Shift 234 5 6 7 P • 000101111 000 1 0 1 100 Space +- o1 o Lower Shift 1 234 5 6 7 P • 000101111 000 1 0 1 100 100 1 1 100 1 001011011 000100011 000100000 001100001 10011 1 100 00111 101 0 o1 0 0 0 0 0 0 0 • 000 1 0 1 0 1 0 • 000 1 100 0 1 • 000 1 100 1 0 • 000110100· 000"0,,,· 000 1 001 1 0 · 000101001 o 1 001 1 1 1 0 01111 1 000 011110111 o 1 0 1 101 1 0 011011001 010010100 o 1 0 1 000 0 1 010111001 010011011 o 1 0 1 1 1 010 011011010· 010011101 110110001 111001100 110001011 110110010 111000110 111010001 111001001 110010011 110101100. 110101111 010110101 1 1 000 0 a 1 0 111000101 110001000 110001101 1 1 000 1 1 1 0 110010000 110100011 110100101 1 101 001 1 0 011110100 o1 1 1 1 1 1 10 111010010 1 1 1 0 0 1 1 1 1 110000111 111001010 110000100 1 101 0 1 010 110101001 o 1 001 1 000 011011100 o1 1 0 1 1 1 1 1 00101 1 000 00101 101 1 000100011 000100000 001 100 0 0 1 001011101 001 1 1 101 0 o 1 0 0 0 0 0 00· 000 1 0 1 0 1 0 • 000110001· 000 1 100 1 0 • 000110100· 000 1 101 1 1 • 000 1 001 1 0 · 000 1 0 1 001 111 1 000 1 0 111 100 1 a 0 111100111 111101000 111101011 111101101 111101110 1 111 1 0 0 0 0 111110011 111100001 011000001· 011111101 100 1 100 0 0 10100 1 101 1 0 0 0 0 1 0 1 0 100110011 101 000 1 1 1 101010000 10100 1 000 1 000 1 001 0 100 1 0 1 101 100 1 011 1 0 010111111 1 0 0 0 000 1 1 101 000 1 0 0 1 a 0 0 0 1 001 100001100 100001111 1 00 0 1 0 0 0 1 100 1 000 1 0 100 1 001 0 0 100100111 010111100 011111011 101010011 1 0 1 001 1 1 0 1 a 0 0 0 0 1 1 0 101001011 100 000 1 0 1 100 1 0 1 011 100 1 0 1 000 o 1 101 0 1 1 0 010010111 011000010 001 001 001 001 001 001 001100010 001 100 1 0 0 001 100 1 1 1 001 101 000 001 101 011 001 101 101 001 101 1 1 0 001 1 1 000 0 001 1 100 1 1 001 1 1 0 101 001 1 101 1 0 001 1 1 100 1 100 0 1 0 100 1 0 0 100 1 1 1 101 000 1 0 1 0 1 1 1 0 1 1 0 1 001 101 1 1 0 001 1 100 0 0 001110011 001 1 101 0 1 001110110 001111001 *Typamat,c Key Notes: 1. Typewriter Keyboard button layout used. Character codes are same on both keyboards. 2. Use Diagram 6-7 to determine the codes for unique ASCII and WTC language characters. Diagram 6-5. USA EBCDIC Keyboard Codes (Sheet 1 of 2) R.....ce Date 6-7 Data Entry Keyboard Codes Upper Shift Gl'lIPhic L U ERASE INPUT ERASE EOF RESET PA1 CLEAR INS MODE DEL TEST REO PA2 ENTER t '" (2 Keys) ..... ~ @II # + $ I a w E R T y 1 2 3 a < > ...., ~ .. 5 6 " ? U I o P A S o F G H J K L Z X C V ( B ) N M 7 8 9 PFl PF2 PF3 PF4 PF5 FIELD MARK 1 234 5 6 7 P • 000 1 0 1 1 1 1 000 1 0 1 100 001011000 00101 1 000 o0 1 0 1 1 0 1 1 000 1 000 1 1 000 1 0 0 0 0 0 001100001 o0 1 0 1 1 1 0 1 o0 1 1 1 1 0 10 o 1 000 0 0 0 0 • 000 1 001 1 0 · 1 0 0 1 1 1 0 0 1 000 1 0 1 0 1 0 • 000110001· 000 1 100 1 0 • 000 1 101 0 0 · 000110111· 000 1 001 1 0 · 000 1 0 1 001 o 0 1 0 1 0 1 1 1 o 1 1 1 1 1 000 o1 1 1 10 1 1 1 o PA3 o 000 1 0 1 1 1 1 000101100 1 0 1 1 0 1 1 000100011 000 1 000 0 0 001100001 o0 1 0 1 1 1 0 1 o0 1 1 1 1 0 1 0 o 1 0 0 0 0 0 00· 000 1 001 1 0 · 1 0 0 1 1 1 0 0 1 000 1 0 1 0 1 0 • 000110001· 000 1 100 1 0 • 000110100· 000110111· 000 1 001 1 0 · 000 1 0 1 001 Spec:e o Lower Shift 1 234 5 6 7 P • o0 SKIP DUP +- o 0 1 0 1 0 1 1 1 o o 1 1 o 1 o1 1 1 o1 o 1 o1 o1 0 0 1 0 1 0 1 0 1 o10 o1 1 1 1 1 0 0 0 0 1 0 0 1 1 1 1 1 000 0 0 0 1 0 1 1 0 1 00 0 1 1 1 1 1 0 1 0 1 1 0 1 1 1 1 1 1 1 000 0 0 1 1 0 0 1 0 0 0 0 1 0 0 0 1 1 1 0 1 0 0 1 0 1 1 1 1 0 0 1 0 0 1 1 1 1 00 1 1 1 010100001 o 1 001 1 000 o 1 1 0 1 1 1 00 o 1 000 0 0 0 0 o o 1 0 0 1 1 1 1 0 1 0 1 1 o 1 001 1 1 1 1 0 1 1 1 1 0 1 1 1 1 0 o1 1 0 1 1 0 1 1 1 1 1 1 1 1 0 0 000 0 1 1 1 0 1 0 0 1 o 1 0 1 1 1 0 0 1 o o 1 0 1 1 0 1 1 0 1 1 000 0 1 0 1 1 0 1 1 000 1 1 1 1 00 1 1 0 0 1 1 000 1 0 1 1 1 1 0 1 1 0 0 1 0 1 1 1 000 1 1 0 1 1 1 0 1 000 1 1 1 1 00 1 0 0 1 1 1 0 0 1 0 0 1 1 1 1 0 1 0 1 1 0 0 1 1 0 1 0 1 1 1 1 1 1 000 001 0 1 1 1 000 1 0 1 1 1 000 1 000 1 1 000 1 1 0 1 1 1 000 1 1 1 0 110010000 1 1 0 1 000 1 1 1 1 0 1 0 0 1 0 1 1 1 1 1 1 0 0 1 1 o 10 0 10 1 1 1 011000001 1 1 0 1 0 0 1 1 0 1 1 0 1 0 0 1 0 1 1 1 0 0 1 1 1 1 1 1 000 0 1 1 1 1 1 1 0 0 1 0 1 0 110000100 1 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 o1 10 10 1 1 0 o1 0 0 1 0 1 1 1 o 1 00 1 0 1 1 1 011000001 001 100 0 1 0 001100100 o0 1 1 0 0 1 1 1 001101000 o 0 1 1 0 1 0 1,1 1 0 0 1 1 1 1 0 0 001 100 0 1 0 001100100 o0 1 1 0 0 1 1 1 001 101 000 o0 1 1 0 1 0 1 1 1 0 0 1 1 1 1 0 0 o o o o o 1 1 0 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 001 0 1 1 1 1 0 1 1 1 1 1 0 0 1 1 1 1 1 0 1 0 0 1 1 1 1 1 0 0 0 0 *Typamatic key Note: Use Diagram 6-6 to determine the codes for unique WTC language characters. Diagrmn 6-5. USA EBCDIC Keyboard Codes (Sheet 2 of 2) Data Entry Keyboard Codes Language USA EBCDIC Austrian! German Belgian! French Danish! Norwegian Finnish! Swedish Italian Portuguese United Kingdom Spanish Keyboard Code 01234567P U U Key Graphic $ $ Key Graphic # # Key Graphic @ @ 0 @ Key Graphic ! ! X5A ! U I Key Graphic .. .. A Key Graphic 4 t 0 .. $ $ "- l l l $ $ ~ Pts Pt f.. f.. 010110110 '0 '0 N :it :# 011110111 N @ @ 01 11 1 1000 @ @ ~ A :# k A :# A # Ii, A :1! 0 @ (2J (2J 0 0 @ X5A X5A ! X5A ! I l l I ~ I ! X7F X4A .. @) .. .. X7F X7F k A .. 4 4 X5A X4A b 4 (2J ¢ A A .. N N X7F '0 X4A 4 A 010110101 4: .. 01 1 1 1 1 1 1 0 $ $ 010010100 Diagram 6-6. WTC Language Keyboard Codes (Data Entry Keyboard) Typewriter Keyboard Codes Language USA EBCDIC USA ASCII·A USA ASCII-B Austrian! German Belgian! French Danish! Norwegian Finnish! Swedish Italian Portuguese SPJOISh United Kingdom Keyboard Code 01234561P Key Graphic $ $ $ $ $ $ U (Shift) U $ $ a (Shift) a A: (Shift) Key Graphic # :# :: 'j,. (Shift) :# :# :::: A :r ::: Key Graphic @ @ @ o(Shift) @ @ (f.u 0 o (Shift) @ @ 0 Key Graphic ! I I I I U U I a I ! Key Graphic .. .. .. A A .. •4 r [ Graphic, f f a Key Graphic I I I I I I I I A ----, Key Key Graphic Key Graphic -., ---, .. ---, ---, .. .. A 0 ----, .. 4: ¢ J I --, --, k l l (Shift) $ ~ s ~ Pts Pt N (Shift) f. £ A (Shift) :;: :: '0 (Shift) 0' o (Shift) (!') A(Sh.tt) to) lll' (n) A ,u: (ftl I ~ ! I I ~ 1 I A 0 R .a a ~ A .. ~ Ii. -- 0 Ql 0 0 t t I I I I I I (Shift) --, --, ---, ---, --, --, X6A (None) '0 "0 A A I I --, ---, N N :;: 01 1 1 1 1 U o 1 01 .- 4 4 $ I 0111 101 1 1 = N I 0101 101 10 o (j () 10101 1 1 1 1 1 1 10 010010100 S () 1 001 1 1 1 () I I ----, ---, ---, ---, 0101 1 1 1 1 1 01 10 10101 Diagram 6-7. ASCII and WTC Language Keyboard Codes (Typewriter Keyboard) Reference Data 6-9 Location and Name Type Logic Page Reference Function or Major Units *A2 Keyboard Controls - 2 9072 KMl11-161 Tests for mod ified characters and protected data. Contains keyboard operation latches, control latches, and MDT latch. , Input Significant I/O Signals Output Keybd Strobe; Keybd Reset; CU Busy; Index; I/O Unlock Keybd; Allow Char Load. KB lock; FF Enable; Ld KB to Fets; Char Rdy Decode; MDT Load Bit 7. *B2 Keyboard Controls - 1 9069 KM011-071 Contains KB decoder, KB Bits 1-7, and P; Alpha Shift; NumeriC Tab controls, Cursor Controls, and Shift; KB Strobe. Insert/Delete Controls. KB Op Decoder outputs; Char Edit; Csr Edit; Op Complete; I nsert Bit 9; Csr Move; Keybd Bits 1-7. C2 I/O Gating and Parity 9066 MG011-061 Contains message buffer register and parity check circuits, late reg ister, attribute register, and gating circuitry for line buffer and message buffer. CR Bits0-9;SR Bits 3-11; KB Bits 1-7; Fets Out Bits 0--9; Load I/O Data; Load Message Buffer. FQ Ser in Bits 0-9; Mesg Bfr Bits 1-9; Attb Reg Bits 2-6; P Chk Bfr. 02 (Modell) 480 Storage and Gate 9057 MB011-061 Modell - Contains 480-character message buffer and gates. FQ Ser in Bits 0-9; Serial Shift Gt; Shift Fets. Fets Out Bits 0-9. 02 (Model 2) 960 Storage and Gate 9065 MB011-061 Model 2 - Contains 960-character message buffer and gates. E2 SE R DES and Special Circuits L514 KA111-121 Contains line driver and line receiver, I/O serializer/ deserializer (SE ROES) and gates, oscillator, and 5V relay switch. Data to Control Unit; Data to Driver Receiver; Mesg Bfr Bits 1-9; Keyb bits 3-7; Data. Data to Control Unit; Data from Driver Receiver; SR Bits 1-12;Osc. F2 960 Storage and Gate 9065 MB111-161 Model 1 - Not used. Model 2 - Contains 960 character message buffer and gates. Third Quarter Serial in Bits 0-9 (from card 02); Shift Fets. Fets Out Bits 0--9. G2 I/O Control 9068 KA011-081 Contains operation decoder, I/O gating controls, status register, SE ROES controls, and cursor positioning controls. Osc, End Screen; Fets Out Bit 7-8; SR Bits 1-12; Data from Driver Receiver; Attention inputs. Stop Clock; Index; Sound Alarm; Write Latch; System Ready Latch; Control Word 1 and 2; Clock; Data; I nput Data; Device Busy; Read Sync; Xmit Check; Read Out Shift; Data to Driver Receiver; CU Busy; Input Inhibited; Load I/O Data; Protected Bfr. *OPtional feature cards Diagram 6-8. Logic Card Data (Sheet 1 of 2) 6-10 TQ Ser in Bits 0-9. Location and Name Type Logic Page Reference Function or Major Units H2 Clock and Step Control 9071 KF01'-07' Contains dot counter, Osc; Read Out Shift; character counter, Set I/O Fast Shift; buffer shifting Load Late Reg; Last controls, and buffer Line. attribute register. Interface Op Step Retrace Ctr; Dot 1-8; Char 0; Next to Last Char; Last Char; Char Ctr All Ones; Fast Shift Latch; Unformatted Display; Normal Gates; High Intensity, Non Disp Blank; Unprotected Char; Numeric Field. J2 Display Control 9067 KFll'-18' Contains retrace Step Retrace Ctr; counter, line Retrace Blank; Lines counter, row counter, 0-9; Csr Line; Input analog controls, Inhibited; System and controls to Ready; Insert Mode. display indicators. Set Blank for Retrace; First 9 Lines; Ld LB Gates; Shift Line Buff; Ld Atb Reg from Fets; Step Row Ctr; Horiz Sync; Blank CRT at Video Output; Row 0; Row 1; Last R 0IIIt; E nd Screen; Unblank; Shift Fets; Vertical Retrace; Bump Display; Serial Shift GT. K2 Line Buffer and Character Generator 9058 (M1) 9070 (M2) MC011-091 Input Significant I/O Signals Output Contains gates to line buffer, ROS register, line buffer, ROS character generator, and data serializer for analog. Fets Out Bits 2-9; Shift Line Buff; Blank CRT at Video Output; Unblank Ind; Lines 0-8. I ! ! : Pre ROS Bits 2, 3, and 7; Bits 4, 5, 6, and 8 from Line Buffer; Non Display or Hi Inten; Video Data Out. I L2 (Not Used) "M2 LP Control 9088 KT011-061 Contains selector light-pen interface and control circuitry. I/O Busy; Bits 4, 5, 6, and 8 from Line Buffer; Pre ROS bits 2, 3, and 7. Bit 7 and LB and MB; LP Busy; LP Aid Bits 3,4, 5, and 6. "N2 Card Reader 2229 KR011-071 Contains magnetic card reader interface and control circuitry. CR Data; Keybd Bits 0-7; Keybd Parity Bit. Strobe; Bits 0-7; Pty; Gate Keyboard. ·Optional feature cards Diagram 6-8. Logic Card Data (Sheet 2 of 2) Reference Data 6-11 Signal Name Card Pin ALO Signal Name Card Pin ALO A-A2 B04 G04 *Ml0 P05 503 *509 512 U04 U06 KM141 KMll1 KM141 KM131 KM141 KM141 KM141 KM141 KM121 + DE Up Shift - Ld KB to Fets - Keybd Strobe - Load Late Reg Gt - Keybd Lock - Keybd Reset + KBTune + FF Enable - I nsert Mode A-H2 G03 G09 Jl0 M03 *M10 *Ml1 P06 *S02 *S05 *S08 *509 *513 *U05 *U09 U13 KM041 KM021 KM041 KM031 KM031 KM031 KM031 KM031 KM031 KM031 KM031 KM021 KM031 KM031 KM011 - Fill Hole - KB Attn Lock KB - Clr Norm Gt Lth + Erase Fld 6 + Keybd Bit 5 + Keybd Bit 7 - Set EAU Lth 7 + Keybd Bit 3 + Keybd Bit 0 + Keybd Bit 1 + Keybd Bit 2 + Keybd Parity Bit + Keybd Bit 4 + Keybd Bit 6 - Insert Csr Bit 9 B03 006 013 G03 Gl1 G13 J02 J09 MOO M13 P06 Pl0 U06 KF071 KF071 KF021 KF071 KF041 KF061 KF051 KF051 KF051 KF031 KF031 KF021 KF021 B04 Bl0 GOa M08 P04 502 505 KF131 KF131 KF161 KF151 KF181 KF151 KF141 P04 *502 503 MG051 MG051 MG041 +POR - POR + P Chk Bfr 509 512 S13 U02 Ul0 KF141 KF171 KF171 KF141 KF141 - Unblank Ind - End Screen + Up Line + Last Row + Blank CRT at Video Output - Force Unblank Line · Bump Display + Vertical Retrace + Dev Check + Horiz Sync P11 S09 MCOal MC091 + V ideo Data Out *004 KT041 KT051 KT051 · LP Strike - Draw Bars - LP Sw Closed A~2 A-C2 *B02 B09 B12 J13 KA111 KAlll KA121 KA121 + Relay Coil + Switched 5V + 2.385 MHz Osc + 4.770 MHz Osc A-F2 M02 MB141 + Fets Out Bit 9 A-G2 B09 *Bl0 *007 G04 G07 G09 J05' J13 M06 P02 504 506 509 510 KA081 KA071 KA061 KA081 KA071 KA061 KA081 KA071 KA061 KA021 KA031 KA031 KA071 KA061 + Insert Null - Clr Insert Csr Latch - Security Key + Delete Csr Bit 9 - Protected Bfr - Device Busy Status Dot - Insert Cursor Norm - Set 1/0 Fast Shift + CU Busy + Index - Delete MDT Bit 7 - Syst Rdy Lth Set - Op in Process - Input Inhibit A-E2 *Input pins Diagram 6-9. Probe Pin Data 6-12 A-J2 A-K2 A-M2 P09 *U06 + Null Bet Cur and End + Numeric Field · Dot 6 + Unprotected Char - Shift Fets + High Intensity + + + - Unformatted Disp Lth Normal Gates Fast Shift Latch Char All Ones Next To Last Char + Blank For First Frame - Late Reg Strobe - Cond Fets Bit 8 + Ld LB Gates + Non Dis Or Hi Inten Feature Name Feature Number Jumper TypewritQr and Operator Console Kevboards 4630, 4632, 4633, 2955 Add wire: • A2B06 to A2008 Data Entry Keybons 4631,2973 Remowwire: A2B06 to A2008 Kevboard Nurruric Lock (USA English, UK English, Finnish, and Swedish) 4690 Add wire: B4B 12 to B4oo8 Remove wire (if installed): B5B03 to B5008 Keyboard Num..ic Lock (Austrian, Belgian, Danish, French, German, 118lian, Norwegian, Portuguese, and Spanish) 4690 Add wires: B4B 12 to 84008 B5B03 to B5008 ·00 not add this wire if display station is at EC.717946 or highel! Diligram 6-10. Keybc8d Future Jump«. To Connector KB 2 (May not be present on all keyboards) o *Key Modules Shift Encoder MOS ""-_ _ _ 7 J"-P--**-S-tr-obe-(-p-in-R-)-II~ } To Connector KB 1 Reset (Pi n C) *Each key module (except RESET and the shift keys) generates two active inputs to the encoder. **The strobe signal is active when two ond only twa active inputs are present at the encoder. Diagram 6-11. Type A Keyboard Encoding Reference Data 6-13 I Hinge (Model 2)-1 1/2 Boord Y2 YI II (Spare) '" ~ t ~ ~ 0- -0 ~ II (Spare) 0 C A ~ (Spare) G ;:n ~ i U I Y3 t ~ ~ I -0 ~ 1 K H ~ r::: ~ t 1 .. u V' I I l! .~ u f--+--+ ---....- .~ ~ § ~ .g'- o " ~ . OJ "" '0 I--- ....._~~.+_+__~._~_~_~_z_ f-- ~ I-- I-- ~-+--.+-.-+-.- ._.- I ~ ~ Z2 ZI Keyboard (Optional Feature) L-_____ Z3 (_s_pa_r_e_I____ ~1 IL-_____A_~'~ ________ ~ See ALD ZZIOI to correlate card type to part number. Unique Card Chart Location 02 02 F2 F2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 K2 Model I 2 I 2 I I I I I I I I I 2 2 2 2 2 2 2 2 2 Language All All All All US English EBCDIC US English ASCII-A US English ASCII-8 UK English German 5wedish/F i nnish Norwegian/Danish Spanish Portuguese US English EBCDIC US Er>glish ASCII-A US English ASCII-B UK English German 5wedish/F i nnish Norwegian/Danish Spanish Portuguese t Name 480 Stor and Gate 960 Stor and Gate Spare - Not Used 960 Stor and Gate Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Li ne Buffer and Char Line Buffer and Char Line Buffer and Char line Buffer and Char Li ne Buffer and Char Li ne Buffer and Char Line Buffer and Char line Buffer and Char Line Buffer and Char Type 9057 9065 . Gen Gen G en Gen Gen Gen Ger> Gen Gen G en Gen Gen Gen G en G en Gen Gen Gen 9065 9058 9103 9104 9102 9101 W068 W06? W070 won 9070 9098 9099 9097 9096 W075 W076 won W079 (Languages not Iisted use USA EBCDIC card types. ) Diagram 6-12. Board Layout by Card Function - Without Features (Card Side View) 6-14 Hinge I (Model 2)--' I 2/3 Boord Y2 Yl II (Spare) A I -0 " ~ ~ II (Spare) D C ~ t=:i Y3 1 ~ u "" VI CD i ~ ) light Pen M K H R ~ ~ II (Spare) G t I Y4 t ~ N iii 00 1 ~ !:::!- ~ u ~" l! ~~ u "0 -'u-&. r-- ~ ~ Ii --....--- "l) - - .- - -- - -,:'E $ ~ I I - "0 .I:: c ec "l) "l) N 8 1- £ ~ t "l) c --.j 8 0 1- :.£ j .£ I -~-- --~.- -' a U a ~o ON ~ --6 ~" ';;"8 ~~ ~ a-(5 ~ -- ~a :S --~ " ~ - - _u_ c I J!. " ~ :.:::; ~ " c U -f-o- f-o- 'i i g ~ 0- 0 ~ " l') ] u c U a _ __ u "l) ~ -c-~- --.;;-a 0-'; >a <":>c :::,. :.£ C eg " 0>:- I :.:::; :;; "l) :'"5 --~ :'5 I co - - '- - ~-- ~ I co ! ZI -,-Hinge (Modelll ~ 'K_e_~ 6 __ t 1 Z2 __ rd___ ~1 ~1___ (s_pa_r_e_)_ _ Z4 Z3 ~1 ~1___ A_n_OI_O_g_ _ ~1 ~1___'_K_e_~ __ ar_d___ ~ See ALD ZZ101 to correlate card type to part number. 'ZI - Keyboard socket without operator identification cord reader feature. Z4 - Keyboard socket with operator identification card reader feature. Unique Card Chart Location D2 D2 F2 F2 K2 K2 K2 K2 K2 K2 K2 l::2 K2 K2 K2 K2 K2 K2 K2 K2 K'2 K2 Model 1 2 1 2 1 1 1 1 1 1 1 I I '2 2 2 2 2 2 2 '2 2 Language All All All All US English EBCDIC US English ASCII-A US English ASCII-B UK English German Swedish/l'innish Norwegian/Danish Spanish Portuguese US English EBCDIC US English ASCII-A US English ASCII-B UK English German Swedish/Finnish Norwegi an/Danish Spanish Portuguese Name 480 Star and Gate 960 Star and Gate Spare - Not Used 960 Star and Gate line Buffer and Char Line Buffer and Char Line Buffer and Char line Buffer and Char line Buffer and Char Line Buffer and Char line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Line Buffer and Char Li ne Buffer and Char Li ne Buffer and Char Line Buffer and Char Line Buffer and Char li ne Buffer and Char Line Buffer and Char Type 9057 9065 9065 Gen Gen Gen Gen Gen Gen Gen Gen Gen Gen Gen Gen G en G en Gen Gen G en Gen 9058 9103 9104 9102 9101 W068 W069 W070 W072 9070 9098 9099 9097 9096 W075 W076 won W079 (Languages not Iisted use USA EBCDIC cord types.) Diagram 6-13. Board Layout by Carel Function - With Features (Card Side View) Ref...nce Data 6-15 G2J04 1 10 II 12 o 0 •••••••••••• 13 o 0 •••••••••••• o 0 Y4 0 E2B03 G2D04 . I< L M N F G E2G03 A ...·---c:..IIc...... E 0 0 0 0 I,! 1 2 oeoeoo. o • 0 • o 0 • oeoo.oeo 0 o • o • o • 0 • 0 eo.ooeoeo oeoeoo. 2 o • o • oeoeooeoeooeo o • 0 o • o • 0 oeo.ooeoeoo o • o • 14 r 2 o. 0 • oeo. o • 0 o • 0 o 0 • • 0 o 0 eooeo. • oeooeo. ooeoeoo o • 0 0.00.0.00.0.00.0.00 ~ • 0 o • 0.0.00.0.00.0.00.0. 0.0.0 0 o o • eoeoo. • 0 eo. eo.ooeoeooeo. o.ooeo.oo. 0 • 0 0 oeooeo. eooeo. • 0 0 • .0.00.0.00.0. • 0 • 0 • 0 • • 0 • a 0 o 13 0 a • 0 • • 0 • 0 • 0 o. • 0 0 • • 0 0 • • 0 • 0 • 0 0 0 • eo.oo.o .o.ooeo • 0 • 0 • • 0 • o • a • 0 • 0 • 0 • 0 • 0 0.0.0 0 • 0 00.0.0 o.o.ooeo. • 0 • 0 • 0 • 0 • 0 0 0 • • 0 • 0 • • 0 • 0.00.0.0080.00.0 0 a • 0 0 • 0 • 0 0 • 0 • 0 o.ooeoeo o • 0 o.oo.oeooeoeo 0.0.00. o • 0 o • 0 o • 0 o • • 0 14 0 o • o • 0.00.0 00.0.0 0.0.00.0.0 0.0.00. oe ooeo.o • 0.0.00.0.0 o.oeoo. 0.0.00.0. 0 0.00.0 0 2 o • 0.0.00.0. 0.00.0.00. o 0 • 0 • 0 a • o • 0 0 o. • 0 • 5 0 ·. 0 _PiN U S o • o • 0 13 14 000000 -I I •••••••••••• 0000 •••• o Z40 2 3 0 o 0 0 0 0 0 0 0 0 •••••••••••• Z2 o 0 a 0 0 0 0 0 o •••••••••••• 0 •••••••••••• 0 0000 •••••••••••• a a 0 ZI 0 0 0 0 +5V Bus (Wl1 0 0 0 ••••••••••• 0 2 3 4 5 0000000000000 Return Bus (W21 G2P09 C8E04 G2S13 Return Bus (W21 +5V Bus (WlI Model 1 only Model 2 only Gate Notes: +5V IS found on all 003. J03. POJ. InC! U03 pins. DC return (ground) is found on III 008. JOB. P08 InC! U08 pins. +8VisfoundonpinE2011. ·12V is found on pins 02006. F2006. E4006. M2D06. and K2D06. +J.4VisfoundonpinM2011. Two high Clrd in E2 and four high c.d in G2 used for illustratIon. 2/3 board (felture boardl used for illustrltion. 112 board (no features 1 is the _ except: I. Card columns L. M, and N are not pre.."t. b. Sock.ts \,,4 Ind Z4 .r. not ~nt. c. +5V bus runs be_n card columns H .nd J. d. Ground bus runs b e _ card columns J and K. Di...... m 6-14. Board Layout Pin Identific8tion D8ta (Pin Side View, ·. _PinI P M 13 14 -I .oo.oeo • 0 o • 0 • o • 0 0 o • 4 o.o.oo.o.ooeo o.oeooeoe oeo.oo.o.o eoo.o.o o • o o o.oo.oeo 13 14 -I 2 0.0.00.0.00. o • 0 G oeoo.o.o 000 • ..... J 0.0.00.0. 0 oo.oeoo.o.ooeo o • 0 o • 00.0.0 o.oo.oeooeo.o 13 0 o • 0 _·. 00.0.00.0.00.0.00. o 0 0 o • • oeoo.o.oo.oeoo. o 5 6-16 0 0.0.00.0.00.0.00.0.00.0.0 o • 8. • o • • 00.0.00.0.00. 0 0 000.000 • 7. 0 3 oeoeooeo • o. o.oeoo.o.ooeo.o o • o • 2. 3. 4. 5. 6. 0 • 9.00.0.00.0.00.0.00.0.00eo.o .00.0.00.0.00.0 I. • • 0.00.0.00.0.00.0.00.0. • 13 14 -I 2 • o • oeoo.oeo • o.oo.o.ooeo.o 5 0 oeooeoeoo. • o.o.oo.o.oo.o.oo.oe o.o.ooeoeo oeo.ooeo.o o • o • 4 • 00000000 oeo.ooeoeo 6 0 0000000 2 2 o.ooeo.oo. 8 0 0 0.00.0.00.0.00.0.00.0. i r o 0.00.0.00.0.00.0.00.0. 14 14 ·. P.- ..... oeoo.oeooeoeoo. o. oeooeoeooeoeooecteooeoe .• • ooeoeoo o • 13 2 oeo.ooeo. oeooeoeooeoeo • a • • oeoo.oeooeoeoo. 0 0 0 • oeo o • o • eoo.oeooeo. oeoeoo. oeooeoeo o 0 o.o.oo.oeoo.o.oo. oeo.oo. o • 0 • 0 o • 0 • 0 oeo.o o • 4 0 o • oeo 3 • oeoeooeo. o • o.ooeo 0 13 0 oeo.oo. o • 0 • 0 oeoeooeo oeoeooeo A1D13 a 0 • a ooeo.o oeooeoeo c.dColumn I Socke. LOUiuon Card Row Pon Column ""Row A A1 M 2 I B 09 1:::::- 6 Section 7. Component Locations Photographs and drawings are provided in this section to aid in locating field-replaceable units, adjustable components, and voltage measurement points. Diagrams 7-1 through 7-6 show Model 1 and Model 2 component locations. Type A keyboard locations are shown in Diagrams 7-7 and 7-8. Voltage component locations and test points are shown in Diagrams 7-9 through 7-15. Diagram 7-16 shows component locations on both the old and new analog 'cards. Type B keyboard locations are shown in Diagrams 7-17 through 7-19. *OFF-PUSH Switch (Power) (Brightness - Outer Knob) (Contrast - Inner Knob) Indicators (3) *Line Fuse (F1) Jack (Feature) Reader Jack Line Cord Retaining Slot Jack Signal Cable Retaining Slot Volume Control *Field Replaceable Unit Diagram 7-1. Modell Locations, Front View Com...... Locations 7·1 Cone Shield Centering Magnets (2) (Under Shields) Yoke Shield (*Yoke under Shield) *CRT CRT Anode *Prime Power Box * -12V Regulator (Behind LowVoltage PC Board) ~==Slj~ *Ferro Focus Potentiometer Diagram 7-2. Model 1 Locations, Left-Side View 7-2 *High-Voltage Power Supply INTEN CRTPb Analog Card Adjustments (4) *Field Replaceable Units *CRT Yoke Shield Cone Shield *+5V Decoupling Capacitor *-12V Regulator * ArcSu ppression Board *Field Replaceable Units Diagram 7-3. Model 1 Locations. Rear View Component Locations 7-3 +5V Fuse AI (Fl) Diagram 7-3.1. Location of +5V and +34V Fuses (Model 1) 74 +34V Fuse AI (F2) TB1 *OFF-PUSH Switch (Power) (Brightness - Outer Knob) (Contrast - Inner Knob) *CRT Indicators (3) 1/0 Jack Cable-_ __ Clamp Low-Voltage Power Supply Shield (*PC Board under Shield) Line Cord Jack *Line Fuse (F1 ) Grounding Wing Screw Keyboard Jack (Feature) Audible * Audible Alarm Alarm Volume (Feature) Control * Low-Voltage Fuses (3) (Under Shield) *Field Replaceable Unit O..,.m 7-4. Model 2 Locations, Front View Component Locations 7·5 CRT Grounding Spring *CRT Centering Magnets (2) (Under Shields) *Logic Board *+5V Switch +5V Fuse 01C/(Fl) Upper Chassis *Security Keylock (Feature) *Field Replaceable Unit Diagram 7-5. Model 2 Locations, Right-Sicle View 7-6 Lower Chassis Chassis Clamp *-12V Regulator +34V Fuse 01C/(F2) Note: This view shows the area to the right and behind the keylock, as shown in Diagram 7-5. Diagram 7-5.1. location of +5V and +34V Fuses (Model 2) Component Locations 7-7 Yoke Shield (*Yoke under Shield) CRT Anode *CRT CRT Socket (Under Cone Shield) *High Voltage Power Supply Upper Chassis Ferro Cover (*Ferro behind Cover) .. AC Capacitor Power Control Actuator *Prime Power Box Chassis Clamp *Field Replaceable Unit Diagram 7-6. Model 2 Locations, Left-5ide View 7-8 Top Cover Original Design Keyboard As.embly I I "- Note: . Either a jumper wIre or a ground strap will be found connecting bottom pan to keyboard assembly. Screw Later Design Audible Feedback Assembly Bottom Pan Cabl. AsHmbly Diagram 7·7. Type A Keyboard Locations Component Locations 7.9 Audible Feedback Cord Pin * * * * 1 2 3 4 Audible Feedback Assembly Cord 5 6 7 8 9 0000000 456 2 8 Fram/fo Function I/O I/O I/O I/O Conn 10 Conn 25 Conn 12 Conn 13 and KBI Z Not Used Not Used Not Used Audible Feedback Assy (White wire) Audible Feedback Assy (Blue wire) * At Disploy Station 9 Blowup of KBI Key Keyboard Signals I/O Conn at Disploy Station KB1 Conn at Keyboard 1 2 3 4 D E F 5 J L M N R 6 7 8 9 10 H 11 -X and Y 12 13 Z - '0 I/O Conn at Disploy Station Signal Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 6 Bit 7 Parity Bit Strobe Audible Feedback Signal Gnd (OV dc) Audible Feedback Return -12V dc "90'' '0'\D \ Volt... 8V d< 5V d< 5""m CO""o« 14 15 16 17 18 19 20 21 22 23 24 25 KBI Conn at Keybaard T U S P K A Not Used Not Used C B V and W - T.~;"o'. (K8 'I I I Alpha DE Up Shift Numeric Flip-Flop Enable Bit 5 Spore Not Used Not Used Reset Spore +8V dc Audible Feedback "8V dc Common Logic Area Address Bus L_-, L_ Top View Diagram 7-8. Type A Keyboard Pin Assembly and Terminal Location 7·10 Signal Input Signal +S\I Return -12V Return -12V +5V +5V Return Prior to EC 717661 J2 0--=========-========00 -12V (3 pi ns) -12V Return (8 pins) +34V Return +34V -18V Return EC 717661 and loter +34V Return Diagram 7·9. Low-Voltage Printed Circuit Board Component Locations 7·1 i1 O+sv ( z ~0C2 ) F1 2ASB w 0 F2 -12V REG SASB ~ 0 o~ +34V ~ F3 2ASB 0(5 I ~ O+8V 0 Diagram 7·10. Low-Voltage Printed Circuit Board Shield Arc-Suppression Neon Diegrem 7·11. Model 2 Voltage Distribution Board 7·12 0 0 ~O-18V Q.. 0 2 &: Q.. ~ 5 6 3 OFF-PUSH Control Shaft Line Fuse (FU Diagram 7-12. Modal 1 Prime Power Box c A R2 (Brightness) D....m 7·13. Brlghtneaand Contrast Control Terminals Component Locations 7-13 o- To CRT Anode r- ~ +400V (Focus) +400V / Enable Input (uv) OC Return Focus Adj Potentiometer Diagram 7-14. High-Voltage Power Supply Arc-Suppression Neon o o o o o r1 I I I I I I E8 Diagram 7-15. Model 1 Arc.suppr. .ion Board 7-14 o Notes: 1. Connector pins on reverse side of board. 2. Component layout may differ from illustration, depending on part number and EC level; however, connector pins are numbered the same on all variations. Old Style PN 2686238 I WIDTH I =n on his eoov it. No .u.mpt should be INde to Tnt Poinu INTEN CRTPb _.thi.voI..... P1 (AI .'" Horiz Drive to Yote (Flyblc:kl-- 8 Horiz R. . . . to Horiz Yoke - - 5 Yoke Up Winding .. t; +IV to Yoke Yoke Down Winding------ 1 2 3 .. 5 DC Gnd to Audlbl. Alerm- 6 7 CRT Cethodt Spere a P2IBt Not Used NIDI +IV to Brithtnftl Pot WI.., . Brithtnftl Pot +60V erightMss Pot CRTGrid 9 10 11 12 13 14 PlICI 16 +34V to HV Supply - - - - - - 9 HV Enible Line a Horiz Ind InL DC Gnd In 7 +34Vln 8 ·12V In 6 +8V In 4 Vert DC Gnd In 3 2 +12V Test Point 'OR Input ( A n I I o g I - - - - - 16 17 18 19 20 21 -Vert Skip (Bumpl In Sper. +Vert RmlCl +5V in (Flit 51 +Unblank CRT DC Gnd from logic BoIrd +Horiz Sync Duel Intensity (+Britht, . Normel' -Audibl. Alarm from LogicWiper of Contrllt Pot Contrllt Pot -Audible Alum to Alarm+6V to Audible AlarmPOR to Logic Note: PN 2586238 will be , . . . , by PN 2586080 .. nIIdId in Cfte of failure. Thil il' directly repflCUbfe FRU. --Future Diagram 7·16. Analog Card (Sheet 1 of 2) N_ Style PN 2565080 TOP MARGIN ~:':n his 600V on it. WIDTH I No attempt should be made to measure this voltage. P4(D) P1 (A) " Horiz Drive to Yoke (Flyback) - - - 6 Horiz Regulator to Horiz Yoke - - - 5 Yoke Up Winding 4 I~ +BV to Yoke Yoke Down Winding - - - - - - 7 P3(e) +34V to HV Supply - - - - - HV Enable Line Horiz and Int. DC Gnd In +34V In -12V In +BV In Vert DC Gnd In +12V Test Point POR Input (Analog. 1 2 3 4 5 6 8 9 8 7 6 5 4 3 2 1 9 10 11 12 13 14 15 16 17 18 19 20 21 +8V to Brightness Potentiometer Wiper· Brightness Potentiometer +60V Brightness Potentiometer CRT Grid DC Gnd to Audible AlarmCRT Cathode Frame Gnd -Vert Skip (Bump) In Spare +Vert Retrace +5V In (Fast 51 +Unblank CRT DC Gnd from Logic Board +Horiz Sync Dual Intensity (+Bright. -Normal) -Audible Alarm from Logic· Wiper of Contrast Potentiometer Contrast Potentiometer -Audible Alarm to Alarm+5V to Audible AlarmPOR to Logic - . Feature Diagram 7-16. Analog Card (Sheet 2 of 2) Top Cover Circuit Board and Electronics Assembly Actuator Mechanism Assembly Connector KBl Audible Feedbock Card Assembly Captive Screw Bottom Pan Cable Assembly Brockel Diagram 7-17. Type B Keyboard Locations Compo.. nt Locations 7-17 Keybutton Group* Protective Shield/ Membrane*f Upstop* Spocebar Stabilizer* End Plate (2)* '~~ Pivot (2)* Key Module* Foam Strip (2)t Top Insulator (2) Circuit Board and Electronics Assembly Base Insulator Bose Plate *Components form all-keys assembly. fMay or may not be present, dependi ng upon EC. Ground Isolation Insert (6)t Holding Screw (6) Diagram 7·18. Type B Keyboard Assembly 7·18 Audible Feedback Card Pin 3 4 5 6 7 8 9 0000000 2 K81 3 Test Points 3 13 • • • • • • • • • • • • 7 I/O Conn I/O Conn I/O Conn I/O Conn Function 10 25 12 13 and KBI Input Signal -SV Return -12V 002 Not Used Not Used Not Used Audible feedback Assy (White wire) Audible Feedback Assy IBlue wire) Return -12V • At Display Station. 9 Keyboard Signals 0 2 6 • • • • 1 2 Audible Feedback Assembly Cord From/To I/O Conn at ~isplay Station • • • • • • 1 2 4 5 6 7 8 9 10 11 14 15 16 17 18 19 20 21 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 6 Bit 7 Parity Bit Strobe Audible Feedback Signal Gnd (OV de) Audible Feedback Return -12V de - 12 13 1'0 Conn at Display Station Signal 805 806 013 808 809 813 812 804 802 010 OOS 3 • • • • • • KBI Conn at Keyboard 002 KBI Conn at Keyboard DOS 004 D06 011 BIO 007 Not Used Not Used 012 B11 003 22 23 24 25 - Signal • AlphCJ Shift •• DE Up Shift • Numeric Shift KB lockout Bit 5 Spore Not Used Not Used Reset Spore 'BV de Audible Feedback· BV dc • Ground on Typewriter Keyboard •• Not used on Typewriter Keyboard Circuit Board and Electronics Assembly System Connect Socket (KB!) TEST POINTS 8 0 2 : E3 E3 Voltage Regulator 8V de to 5V de o ~I = Ii=~ ~~~~--~ D ~------~ c:::J -- -..-----------------......... I I I L __ -, L_ I All-Keys Assembly Key Modules Top View Diagram 7-19. Type B Keyboard Assembly Pin.nd Term;nel Locations Component Locations 7-19 Section 8. Installation Instructions 8.1 GENERAL 8.2.1 Carefully inspect the display station for any obvious damage as soon as it arrives on site. Check that all item~ listed in the bills of material are received. It is extremely important that power-source line voltage is correct and that primary power connections in the display station are correct before power is applied to the unit. Do not tum power on until the following checks are perfonned. Domestic (USA) models use 115V ac (±10%), 60-Hz, single-phase line voltage. No internal adjustments are required for domestic display stations. 8.2 INSTALLATION Check with the customer, and prace display station in the location designated by him. If it is necessary to move a display station, observe good safety procedures. DANGER The 3277 Model 2 Display Station weighs about 90 pounds. Two men should be used to move this unit. Separate the upper chassis from the lower chassis before trying to move the Model 2 display station alone. (See paragraph 5.3.2.8, steps 1-7, to separate the two chasis.) nov COM l00V 110V 123.5V Line Voltage Check Important Note: A grounded power source must be used. World Trade models use 100, 110, 123.5, 220, 235V ac, 50-Hz, single-phase, or 100V ac, 60-Hz single-phase line voltage. Check that the connections on the ferro terminal block, TB1, agree with the line voltage provided. Diagram 8-1 shows the 50-Hz TBL 8.2.2 Feature Installation COnnect all features supplied with the display station. Proceed to paragraph 8.2.3 if no features are to be attached. 8.2.2.1 Keyboard Installation 1. Remove front cover. 2. Plug keyboard cable connector into keyboard jack. Diagrams 7-1 and 7-4 show location of cable jacks for Model 1 and Model 2 display stations, respectively. 3. Secure cable by attaching Model 1 nylon cable clamp or by hooking Model 2 I/O cable retainer. (Model 2 cable 235V 5 o 0 0 Ferro D..,..m 8-1. 5O-Hz F...ro TB-1 Installation Instructions 8-1 3. Open side covers. retainer may have to be repositioned to maintain a snug connector fit.) 4. Connect cable ground strap to the chassis. 4. I nspect for loose cords in logic gate and for loose cable 8.2.2.2 Selector Light-Pen Installation 8.2.4 Power-On Checks 1. Place pen holder next to display station. 2. Insert pen in pen holder. 1. Plug line cord into power source, and pull out OFF- 8.2.2.3 Operator Identification Card Reader Installation 1. Remove front cover. 2. Plug reader cable connector into reader jack. (Diagrams 7-1 and 7-4 show cable socket locations for Modell and Model 2 display stations, respectively.) 3. Secure cable by attaching nylon cable clamp (Modell) or by hooking the cable retainer (Model 2). 4. Connect cable ground strap to chassis. 5. Attach correct WTC language feature label over English language label if applicable. 8.2.3 Prepower-On Checks 1. Remove front cover if it was not previously removed to install feature(s). 2. Plug line cord into display station chassis jack. 8-2 connections. PUSH switch. 2. Perform the display station operational test described in paragraph 5.1.2, beginning at step 3. 3. Refer to Section 3 (Symptom Index) if a malfunctior occurs during power-on check procedure. 4. Refer to paragraph 5.2 if any adjustments are required during power-on check. 5. Connect control unit signal cable. 6. Replace all covers previously removed except front cover. 8.2.5 Hexadecimal Address Label 1. On front cover, locate a point 3 inches up from bottom edge and 1/2 inch in from left edge. 2. Attach label to cover, parallel to bottom edge, with lower-left comer of label on the point located in step 1. 3. Replace front cover. Attrlbut. ·~------~R~ Go.. r-IT r;l---- ~---------------------- ...----~ .. I - - - - - - - , I I I I ..--------------------------~,o~----~ I I L_ Horizonul WIdth Horfzonul Otftectlon AmpUfler CtwlCter Height v"',... Deflettlon Amplif.- AUdibl' A/ann ' ....dv....' Notes· 1. fJ08nddlqMlydabisnownbyherlv line I----------------~ AnllogCard 2. eMCMt,I2only 3. - - - 4.0 6. Oi.,,,,m FO·t. Data Flow T .. Keyboard data path when card reeder feature is installed = Adjustment. -Switch Refe,ence Data FO·' Index AC Capacitor Removal 5-10 Address Label 8-2 Addresses, Control Units and Display Stations Adjustments: Analog Card 5-7 Brightness 5-7 Contrast 5-7 Display I mage 5-6 Focus 5-7 General 5-6 Magnetic Centering Rings 5-7 Power Control Switch 5-8,5-9 (Diag 5-1) Yoke 5-7 -12V Regulator Card 5-8 Alarm (see Audible Alarm) Alignment Mask 2-2 Analog Card: Adjustments 5-7 Removal 5-13 Analog Component Removal 5-11 Arc-5uppression: Board (Modell) 7-14 (Diag 7-15) Check 5-4 Neon 6-3 ASCII: Character Differences 2-8 (Diag 2-8) Character Generators 6-3 Keyboard Codes 6-9 (Diag 6-7) Keyboards 6-4 Audible Alarm 6-2 Audible Alarm Removal 5-20 Audible Feedback Assembly Removal 5-14 Audible Response 6-2 2-9 (Diag 2-10) Box in Every Character Position 3-9 (Diag 3-14) Brightness Adjustment 5-7 Brightness and Contrast Control: Removal 5-13 Terminals 7-13 (Diag 7-13) Card Reader (see Operator Identification Card Reader) Centering Rings (see Magnetic Centering Rings) Character Height 3-8 (Diag 3-8) Character Height Adjustment 5-8 Checks: Keyboard 5-5 Operational 5-1, 5-2 Voltage 5-3,8-1 Circu it Board and Electronics Assembly (Type B) 5-19 (D iag 5-12) Codes, Keyboard 5-6,6-3,6-7 (Diag 6-5) Component Locations: Discussion 7-1 Display Station, Model 1: Front View 7-1 (Diag 7-1) Left-5ide View 7-2 (Diag 7-2) Rear View 7-3 (Diag 7-3) Display Station, Model 2: Front View 7-5 (Diag 7-4) Left-5ide View 7-8 (Diag 7-6) Right-Side View 7-6 (Diag 7-5) Keyboard: Type A 7-9 (Diag 7-71, 7-10 (Diag 7-8) Type B 7-17 (Oia9 7-17), 7-18 (Diag 7-18), 7-19 (Diag 7-19) Component Replacement (See removal entry for desired component. ) Contrast AdJustment 5·7 Control Unit Addresses 2-9 (Diag 2-10) Controls: External 6-1 Internal 6-2 Cover Removal: Displav Station 5-9 Keyboard 5-14 CRT: Glow 3-8 (Diag 3-9) Removal 5-11 Cursor in Every Row 3-9 (Diag 3-13) Data Flow FO-l Date Code, Keyboard 5-5 Diagnostic Programs 1-1, 2-3 Display Image Adjustment 5-6 Display Station Addresses 2-9 (Diag 2-10) Display Station Test: Test Pattern 1 5-1 Without Test Pattern 1 5-2 EBCDIC Keyboard Codes 6-3,6-6 (Diag 6-5) Encoding, Keyboard (Type A) 5-5,6-11 (Diag 6-11) External Controls 6-1 Externallndicators 6-1 (Diag 6-11, 6-2 Failure Isolation 1-1 Feature Installation 8-1 Ferro Transformer: Removal 5-11 50-Hz TB-1 8-1 (Diag 8-1) Field Replaceable Units (FRU) 1-1 Focus Adjustment 5-7 Focus Problem 3-9 (Diag 3-18) Fuse Removal 5-11 General Logic Probe 2-2 (Diag 2-1) Glow on CRT 3-8 (Diag 3-9) Hexadecimal Address Label 8-2 High-Voltage Check 5-4,5-5 High-Voltage Power Supply 7-14 (Diag 7-14) High-Voltage Power Supply Removal 5-11 Horizontal Sync Problem 3-9 (Diag 3-15) Horizontal Width Adjustment 5-7 Image Out of Focus 3-9 (Diag 3-18) Image Size (see Analog Card Adjustments) Indicators: External 6-2 Internal 6-3 Installation: Component (See removal entry for desired component.) Index X-1 F eatu res 8-1 Keyboard 8-1 Operator Identification Card Reader Selector Light-Pen 8-2 Internal Controls 6-2 !nternal Indicator 6-3 Jumper, Keyboard Feature 8-2 6-11 (Diag 6-10) Key Module and Encoding (Type A) 5-5,6-11 (Diag 6-11) Keyboard: Audible Response 6-2 Character Codes: ASCII and WTC Languages 6-9 (Diags 6-6,6-71 Data Entry Keyboards 6-8 Typewriter and Operator Console 6-7 Checks 5-5 Component Locations: Type A 7-9 (Diag 7-7),7-10 (Diag 7-8) Type B 7-17 (Diag 7-17),7-18 (Diag 7-18),7-19 (Diag 7-19)1) Component Removal 5-14 Cover Removal 5-14 D ate Code 5- 5 Descriptions 5-5 Feature Jumpers 6-11 (Diag 6-10) Installation 8-1 Output Codes 5-6 Removal from Display Station 5-14 Return 5-5 Strobe Check (Type A) 5-5 Switch Module Removal (Type A) 5-15 Tests 5-1 Voltage Checks 5-5 Keyboards: ASCII 6-4 Data Entry 6-3,6-6 (Diag 6-4) Operator Console 6-3,6-5 (Diag 6-3) Typewriter 6-3,6-5 (Diag 6-2) Keybutton Removal 5-15 Keybutton Support Module Removal (Type A) 5-17 Light Pen (see Selector Light-Pen) Line on CRT 3-8 (D iag 3-10) Line Voltage Check 8-1 Linearity Adjustment 5-8 Locations (see Component Locations) Logic Board: Layout 6-12 (Diag 6-12),6-13 (Diag 6-13),6-14 (Diag 6-14) Removal 5-14 Logic Card: Data 6-8 (Diag 6-8) Removal 5-14 Logic Probe 2-1 Low-Voltage DC Checks 5-3 Low-Voltage Power Supply Removal 5-10 Low-Voltage Printed Circuit Board 7-11 (Diag 7-9) Low-Voltage Printed Circuit Board Shield 7-12 (Diag 7-10) Magnetic Centering Ring Adjustment 3-8 (Diag 3-7),5-7 Maintenance Approach 1-2 (Diag 1-1) No Horizontal Sync 3-9 (Diag 3-15) No Interrow Spacing 3-9 (Diag 3-16) X-2 Offline Maintenance 1-1 OF F -PUSH Switch Adjustment 5-8, 5-9 (D iag 5-1) OLTs 2-3,2-8 Online Maintenance 1-1 Operator Identification Card Reader: Installation 8-2 Removal 5-20 Test Card 2-3 Tests 5-2 Oscilloscope 2-1 Out of Focus I mage 3-9 (Diag 3-18) Pin and Terminal Locations: Type A Keyboard 7-10 (Diag 7-8) Type B Keyboard 7-19 (Diag 7-19) Pin Identification Data 6-14 (Diag 6-141 Power Component Removal 5-10 Power Control Switch: Adjustment 5-8,5-9 (Diag 5-1) Description 6-1 Removal 5-14 Prime Power Box Removal: Modell 5-10,7-13 (Diag 7-12) Model2 5-10 Probe Pin Data 6-10 (Diag 6-9) Raster: Modell 3-8 (Diag 3-11) Model 2 3-8 (Diag 3-12) Regulator Card Adjustment (see -12V Regulator Card Adjustment) Removal: Analog Components 5-11 Audible Alarm 5-20 Audible Feedback A~mbly 5-14 Brightness and Contrast Controls 5-13 Covers 5-9 CRT 5-11 Keyboard from Display Station 5-14 Keyboard Components 5-14 Keybutton 5-15 Logic Components 5-14 Operator Identification Card Reader 5-20 Power Components 5-10 Power Control Switch 5-14 Security Keylock 5-20 Selector Light-Pen 5-20 Yoke 5-13 Replacement, Component (See removal entry for desired component.) Requesting RFTs 2-4 RFTs 2-3,2-4 Row Spacing Adjustment 5-8 Row Spacing Problem 3-9 (Diag 3-16) Scan Lines 3-9 (Diag 3-17) Security Keylock: General 6-1 Removal 5-20 Tests 5-1 Selector Light-Pen: General 6-1 Installation 8-2 Removal 5-20 Tests 5-2 Shift Key Module Check 5-6 Size, Image (see Analog Card Adjustments) Spacebar A_mbly: Chec:ks 5-6 Removal: Type A 5-17 Type B, 5-19 Strobe Check, Keyboard (Type A) 5-5 Symptom Index 1-1, 3-1, 3-2 Symptoms 1-2 Test Card 2-3 Test Pattern 10 Numbers 2-8 (Oiag 2-9) Test Pattern 1 2-3,2-5 (Oiag 2-4), 3-7 (Oiags 3-1,3-2) Test Pattern 2 2-4,2-6 (Oiag 2-5), 3-1 (O;ag 3-3) Test Pattern 3 2-4,2-6 (Oiag 2-6), 3-7 (Oiag 3-4) Test Pattern 5 2-4, 2-7 (Oiag 2-1) Test Patterns 2-3 Tests: Keyboard 5-1 Operator Identification Card Reader 5-2 Security Keylock 5-1 Selector Light-Pen 5-2 Tools 1-1,2-1 Top Margin Adjustment 5-8 Trouble Analysis 1-1 Troubleshooting Diagram Usage 4-1 Troubleshooting Diagrams 1-1, 4-3 through 4-30 Type A Keyboard: Description 5-5 Locations 7·9 (Oiag 7-7), 7·10 (Oiag 7-8) Ttpe B Keyboa-d: Assembly 1-18 (Oiag 1-18) Description 5-5 locations 7-17 (Oi8g1-17I, 1-18 (Oiag 7-181, 7-19 (Oi89 7-19) Voltage Checks: Arc Suppression 5-4 General 5-3 High Voltage !k. Keyboard 5-5 Low Voltage 5-3 6.3V AC 5-4 Voltage Distribution Board 7·12 (Oiag 7·11) Width Adjustment (see Horizontal Width Adjustment) WTC Languages: Character Differences 2-8 (Oiag 2-8) Keyboard Codes 6-9 (Oiags 6-6, 6-7) Yoke: Adjustment 5-7 Problems 3-7 (Oiags 3-5, 3-6),3-10 (Oi8gs 3-19 through 3-23) Removal 5-13 6.3V AC Check 5-4 -12V Regulator Card: Adjustment 5-8 Removal 5-10 Index X-3 3277 Display Station Models 1 and 2 Troubleshooting Guide READER'S COMMENT FORM Order No. S"~7-2314-5 Your views about this publiClltion may help improve its usefulness; this form will be sent to the author ~ department for appropriate action. Using this form to request system assistance or additional publications will delay response, however. For more direct luznd/ing of such request. please contact your IBM representative or the IBM Branch Office serving your locality. Possible topics for comment are: Clarity Accuracy Completeness Organization Index Figures Examples Legibility .. n c: '"oa: » 0' :1 C r- i What is your occupation? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ Number of latest Technical Newsletter (if any) concerning this publication: _ _ _ _ _ _ _ _ _ _ _ __ Please indicate if you wish a reply. If yes: DYes o No Name Address Thank you for your cooperation. No postage stamp necessary if mailed in the U.S.A. (Elsewhere, an IBM office or representative will be happy to forward your comments.) SY27-2314-5 Your comments, please ... Your comments, together with your answer to the questions on the back of this form will help us produce better publications for your use. Your comments will be carefully reviewed by the persons responsible for writing and publishing this material. All comments and suggestions become the property of IBM. Fold Fold ........................................................................................................................................................... I First Class Permit 40 Armonk New York Business Reply Mail No postage stamp necessary if mailed in the U.S_A. Postage will be paid by: International Business Machines Corporation Department 52 L Neighborhood Road Kingston, New York 12401 , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " .................... Fold International Business Machines Corporation Data Processing Division 1133 Westchester Avenue, White Plains, New York 10604 (U.S.A. only) IBM World Trade Corporation 821 United Nations Plaza, New York, New York 10017 (International) Fold I . 8 c E cca >... ca 8c ~ .... ~ .;; ! I E CD ~ ~ ~ . GI .I: :I u :=E ----------------------------------~ SY27-2314-5 International Buslne.. Machine. Corporation Data Proce..lng Division 1133 Westchester Avenue, White Plains, New York 10604 (U.S.A. only) IBM World Trade Corporation 821 United Nations Plaza, New York, New York 10017 (lntematlonal)
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : No XMP Toolkit : Adobe XMP Core 4.2.1-c041 52.342996, 2008/05/07-21:37:19 Create Date : 2018:10:03 16:11:43-08:00 Modify Date : 2018:10:03 16:16:19-07:00 Metadata Date : 2018:10:03 16:16:19-07:00 Producer : Adobe Acrobat 9.0 Paper Capture Plug-in Format : application/pdf Document ID : uuid:a95277ac-4f04-fa45-a39c-82dc296c6e3d Instance ID : uuid:ad67821c-7220-0e48-a30c-3bc825ddfa9b Page Layout : SinglePage Page Mode : UseOutlines Page Count : 124EXIF Metadata provided by EXIF.tools