229 2039 1_1403_Service__May64 1 1403 Service May64
229-2039-1_1403_Service__May64 229-2039-1_1403_Service__May64
User Manual: 229-2039-1_1403_Service__May64
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IBM Field Engineering -. -t' ~ ~ ' . :: t. ,· t ,. • . .. . " ..: . ..... ~_ FOREWORD IBM 1403 SERVICE INDEX The IBM Service Index was developed to pravide the field with a reference to aid in troubleshaoting. Diagnastic charts have been developed to aid the Customer Engineer in diagnosing machine problems. Service hints have been written along with the diagnostic charts so that as much information as possible was included. Logic flow charts are included as a quick refresher to proper operation of specific circuits. Information was analyzed from IR's for a three months period. Additional information was secured with the cooperation of Endicott Department of Education, Product Engineering Department, and Customer Engineering Department. HOW TO USE SERVICE INDEX I. A. Determine symptom. (Observe machine in operation. Obtain as much information as possible from the operator.) B. Review correct and incorrect printed reports. C. Run diagnostics. 2. Locate symptom in Table of Contents. 3. Follow the Diagnostic Chart to determine probable cause. 4. Check the Service Hints to aid in troubleshooting. 5. Information in the Service Index can be used by the C.E. as a quick refresher to proper operation of specific circuits. The following symbols are used throughout the index:B GENERAL INFORMATION Customer personnel most familiar with machine and programming. Customer Engineer most familiar with machine. Machine Serial # _ _ _ _ _ _ __ Special features or unusual application. _ _ _ _ _ _ _ _ _ _ _ __ TABLE OF CONTENTS PAGE TITLE SERVICE HINT REFERENCE ••••••••••••••••••••••••••••••••••• 2 1403 CARRIAGE LOGIC DIAGRAM •••••••••••••••••••••••••••• 3 CARRIAGE FAILURES WAVY PRINTING .................................... 4 SPACE FAILURES ..................................... 6 SKIP FAILURES ••••••••••••••••••••••••••••••••••••••• 8 CARRIAGE RUNNING AWAY ••••••••••••••••••••••••••10 CARRIAGE SPACE CONTROL TIMING ••••••••••••••••••••••••• 11 SKIP TIMING •••••••••••••••••••••••••••••••••••••••••••••• 11 FORM CONTROL OP ........................................ 12 CARRIAGE FAILURE SERVICE HINTS ........... n 14 .............. TERMINAL BlOCK lOCATION CHART ................ o • • • • • • • 23 SPACE KEY ••••••••••••••••••.•••••••••••••••••••••••••••••• 26 RESTORE KEY ............................................... 26 PRINT QUALITY SERVICE HINTS ...............................27 RIBBON' DRIVE TROUBLE ••••••••.••.••• ·0 • • • • • • • • • • • • • 0 ••••••••• 29 FORMS STACKING TROUBLE ................................ 31 1401 OR. PRINTER STOPS. ••••.••.•..•.••.•.•. 0" ... o. u .................. 32 SYNC CHECKS ·.. W*.H· ••· . . . . . . . . . . . . . .· ••••••• oo . . . . . . . . . . . . . . . 34 SYNC CHECK SERVICE HINTS ••••• n ......................... 36 PRINTER TIMING CONTROL •••••••••••••••••••••••••••••••••36 PSS COUNTER •••••••••••••••••••••••••••••••••••••••••••••• 3B PRINT CHECKS •••••••••••••••••••••••••••••••••••••••••••• 42 PRIN·T DATA FLOW ......................................... 44 PRINT OP - BUFFER ••••••••••••••••••••••••••••••••••••••••• 45 PRINT OP TIMING:" BUFFER •••••••••••••••••••••••••••••••• .47 PRINT OP- NON-BUFFER ............. ~ •••••••••••••••••••••• 50 PRINT OP TIMING - NON-BUFFER ••••••••••••••••••••••••••• 52 PRINT CHECK SERVICE HINTS •••••••••••••••••••••••••••••••• 55 HAMMER RESET AND RESET TIMING •••••••••••••••••••••••••• 56 PRINT CHECK LOGIC ••••••••••••••••••••••••••••••••••••••• 57 RESET CHECK LOGIC ••••••••••••••••••••••••••••••••••••••• 58 PRINTABLE CHARACTER TABLE ••••••••••••••••••••••••••••••• 60 UNITS & TENS DRIVER OUTPUT .............................. 61 STORAGE PRINTOUT .................... : ...... : ........... ~1 SERVICE HINT REFERENCE PG. S.H. 14. .. TITLE I. Forms Tractor PG. S.H. TITLE 30 ... 37. Ribbon Stalling 2. Hydraulic Belt 38. Reverse Drag Friction Rings 3. Emitter Brush 39. Ribbon Skew Fai lures 4. Hydraulic Carriage Waveform (on P.M.) 40. Ribbon Reverse Failures 5. Valve Block Assembly (Magnet Assembly) 31 ... 41. Stacker Tension Springs 6. Erratic Carriage Failures 33 •.. 42. Intermittent 1403 Stopping 15 ... 7. 1403 Hydraulic Unit Reassembly 8. Carriage Failing to Move (Broken Valve Stem) 9. Belt-Yoke 10. Carriage Sync Points II. Check Valves 16 ... 12. Carriage Adjustment-Dash Method 18 ... 13. Carriage Adjustment-Tach-Generator Method 22 ... 14. Special Skip Cases 23 ... 15. Valve Body 16. Special tool (Valve Body Removal) 17. Form Control Diagnostics 18. Procedure to Check Slow Brushes 24 ... 19. Scoping Carriage Controls 25 ... 20. Magnetic Emitter Adju~tment 21. Broken Valve Stem 22. Valve stem lock nuts 27 ... 23. 43. Forms Tractor Adjustments 34 •.. 44. Sync and Print Checks 45. Chain Oiler Adjustment 36 ... 46. Binding Chain 47. Method of Checking Drum Pulse 37 ... 48. MethodofCheckingP.S.S. Pulse Variation 49. Chain Motor Bevel Gears 38 ... 50. Check Buffer Clock 51. 41 ... 52. Checking Advance of P.S.S. Counter (Buffer) Intermittent False Sync Checks 53. Sync Checks Caused By Noise 54. Thermal lights 55 ... 55. Intermittent Print Checks (Blown Fuses) 56. 57-61. 62. Checking Counters and Rings Troubleshooting Print Check Techniques Fails to Print With No Print Checks Density Variation (light Printing) A-P 63. Print Magnet Coil Resistance light tops or bottoms 64. Troubleshooting Print Check Technique Heavy Stroke Width 65. Intermittent Print Checks (Missing Voltage) 26. light Stroke Width-All Characters 66. Checking Hammer Flight Time 27. 67. Pri nt Magnet 24. 28 ... 25. light Stroke Width-Individual Hammers 28. Phantom Printing 68. Check Hammer Driver Fuse For Correct Size 29. 69. Slur 30. Wavy Printing Isolate Errors (Print Reset Checks) 70. Sync Points (Print Checks) 31. Smudge Printing 56 ... 71. Blowing Hammer Driver Fuses 32. Cartridge Mounting 57 ... 72. Print Checks 33. Paper Guards Removal 58 ... 73. Reset Checks 34. Shimming Nose Cone (For Card Stock Forms) 59 ... 74. Print Checks Caused By Noise 35. Chain Cleanl iness 36. Identification of Hammer Assemblies 75. Display Print Buffer-1401 60 ... 76. Scope Operating Procedures 77. Printable Character Table Explanation 2 1403 CARRIAGE LOGIC DIAGRAM CARR OP REG A REG CHANNEL REG SKIP AFTER SKIP BEFORE d CHAR SPACE BEFORE 12 SLOW LATCHES 8 SKIP EI 4 SET SET 2 SPACE SPACE AFTER 36.43.11.1 36.45.11.2 SPACE SKIP REG 8 EI SPACE CONTROL RESET ' - - -_ _--1 [B~ EI BRUSH SPACE LAT AFTER PRINT SPACE REST CNTRL TRG ~----------++;-----------------vr~ >-+----1 80 US t-t-.--I 4. 5 START MS . SS SS CARR. TAPE BRUSHES DOWN SPACE START -60 V ON (CAR INTLK) ' - - - - - - - - 1 CARR 1-----1 START RESET NOTE I INLK LATCH 1--_--1 STOP LATCH NOT CARR. TAPE -60 V SPACE STOP RESET OP. REG. AND SP.-SK. REG. NOTE I: PREVENTS NOISE PULSES FROM IMPULSING STOP SS DURING SET UP OF CARRIAGE OP REG15TER AND SPACE SKIP REGISTER. FORMS CHK OR CAR STOP KEY RUN TRIG CAR. STOP LATCH CHECK RESET START RESET 3 CARRIAGE FAI LURES WAVY PRINTING WAVY PRINTING CAN ALSO BE REFERRED TO AS UNEVEN PRINTING RUN 2000 SERIES FORMS CONTROL DIAGNOSTICS REFER TO S. H. 17 FOR LISTING REFER TO CARRIAGE LOGIC DIAGRAM PAGE 3 FOR REFERENCE CHECK FOR PAPER BLOUSE AND BELT TENSION REFER TO S.H. I PROPER LEVEL SHOULD BE TO BOTTOM OF COILS (APP. I GAL.) IF lOW, FILL AND CHECK FOR LEAKS CHECK SINGLE SPACE TIMINGS REFER TO S.H. 12C & 12F OR 13B SCOPE TIMING SHOULD BE 1.7 MS LESS THAN THE 16 MS REFER TO S.H. 12F ,.13B REFER TO S.H. 20 TO CHECK ADJUSTMENT I. SPACE NEEDLE VALVE 2. BYPASS NEEDLE VALVE REFER TO S.H. 12 OR 13 3. SPACE MAG. ARM. CLEARANCE. REFER TO SH .5 SCOPE EI IMPULSE REFER TO S. H. 3 YES 2 4 WAVY PRINTING 3 2 CHECK STOP BRUSH RELATION TO EI REFER TO S.H. 12 YES ~--l2. CHECK: SLOW BRUSHES SLOW LATCHES REFER TO S.H. 18 NO CHECK THE ADJUSTMENT OF I. EI TIMING 2. SKIP NEEDLE VALVE 3. BYPASS NEEDLE VALVE REFER TO S.H. 12 OR 13 4. SKIP MAGNET ARMATURE CLEARANCE REFER TO S.H. 5 REFER TO S.H. 2 REFER TO S.H. 6 5 SPACE FAILURES SPACE KEY FAILURES ONLY, SEE "SPACE KEY FLOW CHART PAGE 26 FOR REFERENCE ERRATIC SPACING CARRIAGE SPACING INCORRECT NUMBER OF SPACES NO SCOPE RESTORE CONTROL TRIGGER CIRCUITRY CHECK 4.5 MS. SINGLE SHOT TIMING REFER TO S.H. 12C OR 13B 10 MS. 5.5, SHOULD BE 1.7 LESS THAN THE FI NAL SETTING OF THE 16 MS. SINGLE SHOT RUN 2005 DIAGNOSTIC TEST YES REFER TO CARRIAGE SPACE CONTROL TIMING CHART PAGE II CARRIAGE LOGIC DIAGRAM PAGE 3 FORM CONTROL OP CHART PAGES 12,13 SCOPE CIRCUITS REFER TO SH. 10 FOR SYN INPUTS ARE THE A REG. D CHARACTER OR THE SPACE RESTORE CONTROL TRIGGER 6 NO SPACE FAILURES SCOPE INPUT AND OUTPUT THIS CIRCUITRY COMPARES ">-_ _ _ _ _ _ _ _ _ _ _- ( THE OUTPUT OF TI, T2 TO THE SPACE SKIP KEGISTER. &EFER TO S.H. 10 FOR SYNC. SCOPE CIRCUITRY. TI AND T2 COUNT THE NUMBER OF SPACES THE CARRIAGE HAS TAKEN REFER TO S. H. 10 FOR SYNC 80 USEC. START SINGLE SHOT 10 USEC. SINGLE YES CARRIAGE INTERLOCK LATCH SCOPE SPACE- SKIP REGISTER CIRCUITRY REFER TO S.H. 10 FOR SYNC SPACE/SKIP REGISTER POSITIONS I AND 2 ARE USED WHEN SPACING CHECK ADJUSTMENTS OF: I. BYPASS NEEDLE VALVE 2. SPACE NEEDLE VALVE REFER TO S.H. 12 OR 13 3. SPACE MAGNET ARMATURE CLEARANCE REFER TO S. H. 5 A REG. D CHARACTER (NUMERIC PORTION) CHECK ADJUSTMENT OF I. EI TIMING REFER TO S.H. 12 NOTE I: REMOVED ON 1401 28281 AND ABOVE. ALSO ON 1401's WITH MAGNETIC EMITTER FOR INTERM ITTENT ELECTRONIC TROUBLE CHECK VOLTAGES AND BIAS OR VIBRATE ACCORDING TO ACCEPTED METHOD 7 SKIP FAILURES ERRATIC FAILURES (SKIPPING TOO FAR, TOO SHORT, AND STOPING AT WRONG HOLE) ESTORE FAILURE ONL REFER TO "RESTORE KEY FLOW CHART" PAGE 26 CHECK: I) SLOW BRUSH INTEGATOR CARDS LATCHES REFER TO S.H. 18 2) STOP BRUSH, ENCODER & BRUSH INTEGRATOR CARDS REFER TO SH. 12E 3) SKIP TRI GGER 4) 10 USEC. CHANNEL RESET SINGLE SHOT NOTE: IF ONE CHANNEL IS FAILING CHECK CIRCUITS THAT PERTAINS TO THAT CHANNEL. REFER .:r0 S. H. 20 TO CHECK ADJUSTMENT YES SCOPE EI IMPULSE REFER TO S.H. 3 CHECK BRUSH TIMING RElATION TO EI REFER TO S.H. 12 REFER TO: I) SKIP TIMING CHART PAGE " 2) CARRIAGE LOGIC DIAGRAM PAGE 3 3) FORM CONTROL OP FLOW CHART PAGES 12,13 SCOPE CIRCUITS REFER TO S. H. 10 FOR SYNC. POINTS A REGISTER D CHARACTER OR REST. CTRL. TRIG. CAN SET THE CARRIAGE OP. REGISTER(AlPHA PORTION) 8 NO SKIP FAILURES SCOPE CIRCUITRY. REFER TO S.H. 10 FOR SYNC. OUTPUT OF THE SP/ SK REGISTER IS COMPARED TO CHANNEL REGISTER. WHEN COMPARISON IS EQUAL, RESULT IS COMBINED WITH SKIP OPERATION TO ACTIVATE COMPARE SKIP EQUAL THE FOLLOWING CIRCUITS CAN BE SCOPED USING SPACE KEY OR RESTORE KEY REFER TO S.H. 19 STOP BRUSHES SCOPE CHANNEL REGISTER CIRCUITRY REFER TO S.H. 10 FOR SYNC POINT 10 USEC. STOP SINGLE SHOT 10 USEC. RESET SINGLE SHOT YES CARRIAGE INTERLOCK LATCH E2 TRIGGER SCOPE SPACE SKIP REGISTER CIRCUITRY REFER TO S.H. 10 SYNC POINT A REG. D CHARACTER (NUMERIC PORTION) EI IMSEC. DELAY NOTE I CHECK THE ADJUSTMENTS OF: I. EI TIMING 2. BYPASS N EEDLE VALVE 3. SPACE NEEDLE VALVE 4. SKIP NEEDLE VALVE (IF HIGH SPEED SKIP FAILURE) REFER TO S.H. 12,13 SPACE/SKIP MAG. ARM. CLEARANCE REFER TO S. H. 5 YES NOTE I: EI IMSEC. DELAY WAS REMOVED ON 1401 28281 AND ABOVE. ALSO ON 1401 WITH MAGNETIC EMITTER. 9 CARRIAGE RUNNING AWAY CARRIAGE RUNS AWAY ON CARRIAGE OPERATION OR RESTORE NO CHECK FORMS CART GROUNDING STRAPS ON BOTH CARTS. 1401 EC CEM 541 PROVIDES NEW STYLE GROUNDING STRAPS. CHECK EI AS PER S.H. 3 AND S.H. 12D OR 13C REFER TO S.H. 35 IF CARRIAGE STOP OR START RESET SWITCHES DO NOT STOP CARRIAGE. IT IS A GOOD INDICATION OF A BROKEN VALVE STEM CHECK LOCKNUTS ON VALVE STEM REFER TO S.H. 36 CHECK MAGNET DRIVER CIRCUITS START DE-ENERGIZED STOP ENERGIZED CHECK BOTH HIGH SPEED AND LOW SPEED MAGNETS ~o CARRIAGE SPACE CONTROL TIMING SINGLE SPACE -JL_ti_r_·i~_e;..~;..s_1:co...£....;c;..0;.;~;.;.:t;..~;..ng:;.s_-=j_.... ~ "-- E2 Trigger Space Counter Moved I Line =I DOUBLE SPACE 1 Driven 10 MS ------;~~I"'.--II MS \ Cal, t_in..;g;"-'_--J E2 Trigger / , Space Counter "'- =1 -1 ~ Moved 2 Lines +oS EI Brush and E2 Trigger on Space Counter = 2 TRIPLE SPACE Driven 16 MS ~ Maved II MS Coasting 3 Lines S E2 Trigger" Space Counter = EI Bruih and E2 Trigger on Space Counter = 2 I \ EI Brush and E2 Trigger on Space Caunter = 3 Note: All timings are approximate. SKIP TIMING NOTE: On a skip operation the tope will stop with the hole I space past the ? CHANNEL BRUSHES brushe~::~~~~~~~~~~~~~~~__ STOP CHANNEL BRUSH START EI EI ~ EI ~ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Coasting When skipping more than one line,signal to stop must come I space before same as double or triple space. II FORM CONTROL OP FORM CONTROL OP CODE I EXECUTE ELIMINATE 1 SET CARRIAGE SPACE SKIP REGISTER I SET CARR OP REG I I...-----{\ NO SPACE YES AFTER OPERATION\-:..::..::.--------------. I~ SKIP YES {'HER OPERATIONJ NO SKIP YES ...----( BEFORE OPERATlO~ TURN ON SPACE BEFORE LATCH TURN ON SKIP BEFORE LATCH TURN ON SKIP AFTER LATCH TURN ON SPACE AFTER LATCH r----=====::;--ll N I O} \ YES PRINT SCAN 48 _____ ..JJ CONTINUE TO EXECUTE INSTRUCTIONS I CARRIAGE rAPE IN PLACE? NO YES NO J I 1...----------"""\ RINTS WITHOUT _-1._--'---, BLOCK CARRIAGE OR )------1 OPERATION ~SPACING SKIPPING, BRUSHES IN PLACE? I \ 'I START S.S. I TURN ON CARRIAGE INTLK. ALSO. INTERLOCKS 1------1 THE PRINTER I ENERGIZE SPACE START MAGNETS 12 YES . 1 - - - - 1 CARRIAGE MOVES FORM CONTROL OP r JUST AFTER E2 BRUSH SIGNAL I - - - - { CARRIAGE STARTS ...-____---.:N..:..o~1 SKIP OPERATION-A.:~Y...;..;;.;ES~_ _ _ _---. I TURN ON SPACE CONTROL I .--_....;.N...;.;O~/SI NGLE \ SPACE OP? -tjQjSINGLE LINE ~ SKIP \r-:Y~E.;..S- - - . . . , I CONDITIONS STOP FOR SPACING OF 2 OR MORE LINES TURN ON E2 TRIGGER TURN OFF SPACE CONTROL I CONDITIONS STOP FOR SKIPS OF 2 OR MORE LINES TURN ON E2 TRIGGER N~CHANNEL \ YES 1 I REG. rES EQUAL CARR S K-SP REG? CONTINUE SKIPPING TURN ON SPACE CONTROL 2 NO /DOUBLE SPACE OPERATION r------{\ \ YES I TURN ON L/SPACE CONTROL SPACE CONTROL I & 2 ON (3 LINES) I\! I COMPARE SPACE EQUAL COMPARE SKIP EQUAL STOP S.S. CARRIAGE INTERLOCK OFF ENERGIZE SPACE STOP MAGNETS "SPACE OFF MD 13 CARRIAGE FAILURE SERVICE HINTS S.H. I FORMS TRACTOR Forms tractor drive belt should have proper tension. Upper tractor pins should touch top edge of poper hole, while bottom troctor pins should touch bottom edge of paper hole. No elongation should occur when moving paper manually with paper advance knob. Slight amount of elongation is permissable under power. Refer to 1403 reference manual for adjustment precedures of belt tension and tractor shaft positioning. Be sure no binds exist when manually turning the advance knob in neutral. S.H.2 HYDRAULIC DRIVE Hydraulic drive belt should have 1/8" to 5/32" deflection half way between the drive motor and eject pump, use force of I lb. or 450 grams. Check for broken strands. S.H. 3 EMITTER BRUSH A. Emitter Brush Short strands on EI brush will allow the EI impulse to lengthen out as shown and cause a critical timing condition between EI and the respective stop brushes. VALVE BLOCK ASSEMBLY S.H.5 The hydraulic unit is reliable. Do not attempt to dismantle the hydraulic unit unless the trouble is positively traced there. If dismantled, use extreme care and cleanliness when reassembling. To alter magnet armature cleorances and spool valve adjustments, the valve block assembly has to be removed from the hydraulic unit. Armature clearances may be checked without removing assembly. Check magnet assemblies for worn or binding pivots. A fast method to remove the assembly is explained in S.H. 15 and 16. The method in the 1403 Reference Manual can also be used, which removes the reservoir. S.H.6 ERRATIC CARRIAGE FAILURES Carriage response can be checked by using the tach-generator. Tractor shaft should start moving 3-4 m .s. after the start impulse and begin to slow down 3-4 m.s. after the stop impulse. If failures still exist and carriage waveforms can not be corrected by adjustment, the following should be checked: f-- COMMUTATOR PIN 474050 ~STSP /- I ,.) 3-:1m .s.,\. ~~ 3-4 EI WAVEFORM IMPULSE TOO LONG; SHORT STRANDS EI WAVEFORM GOOD IMPULSE C.s·1 A. Check - 60V for low voltage and loose terminals. B. Check space and skip magnet coils. Each has two coils in parallel. If one is open or has incorrect resistance, poor carriage response can result. Check magnet assemblies for worn or binding pivots. C. Hydraulic Carriage Speed To check the speed of the hydraulic carriage perform the following: I) Punch one holes in carriage tape, I inch apart. 2) Program F B bit 2 444 in location 444. (This allows the carriage torun continually in low speed.) 3) Run program. Scope the "-T stop brush I" output. Sync internal, negative. Test point is located on the point of printer. The output should be 28.6 m.s. to 30.3 m.s. per in. (33-35 in. per sec.) This is measured from leading edge to leading edge. 4) The following can be the cause of slow carriage movement~ B. Scope EI at test hub. I) Put IBM card under carriage brushes. 2) Depress the restore key. This puts the carriage in a continual low speed sk ip. C. EI impulse should be fairly clean of noise. Dirty or worn brush or dirty emitter roll will cause distorted waveform. Crocus cloth can be used to cI eon roll. The emitter roll should always be cleaned when replacing the EI brush or common brush. Clean roll with tape cleaner after cleaning with crocus cloth. D. Check brushes for proper tension. Set EI brushes for 23/32":!: 1/64 projection beyond the brush holder. EI brush timing should be checked whenever the brush is replaced. Refer to S.H. 12D or 13C D. E. F. G. H. S.H.4 HYDRAULIC CARRIAGE The hydraulic carriage waveforms should be checked during PM (Refer to S.H. 12,13.) This will enable the CE to become familiar with the adjustment procedures. 14 a. Hydraulic filter clogged. NOTE: The filter should only be changed when trouble is suspected not on a P.M. basis. b. Check valve. See S.H. II. c. Hydraulic fluid leakage within the unit. d. Spool valve adjustments. e. Bind in hydraulic unit. Bent shaft on the hydraulic unit Can cause erractic spacing. Loose AC cable to 1403 can be the source of erractic carri age behavior. Erractic carriage movement can also be caused by 1403 fuse #9 being blown. This causes an open circuit to the high speed stop magnet. An interruption of the -20V can cause unexplained carriage failures. Check HD-3 points in the 1402 for bounce or burned points. Forms cart not grounded can also cause unexplained carriage failures. Incarrect start and stop magnet armature to core clearance may cause the carriage to escape when power is turned off. This is due to the start magnet overriding the stop magnet momentarily. Refer to 1403 Reference Manual for adjustment procedure. J. The following are B/M's available that correct certain machine problems: I. Prevent premature turn off of the high speed skip trigger. 1401 25,000 Series EC CEM 569 2. Improve single line skip and no line skip. 1401 25,000 Series EC CEM 568 1401 20,000 Series ECCEM 461 3. Desensitize 70 usec. single shot. 1401 25,000 Series EC CEM 567 1401 10,000 Series EC CEM 514 4. Eliminate carriage restore failure. 1401 25,000 Series EC CEM 498 1401 20,000 Seri es EC CEM 382 1401 10,000 Series ECCEM 460 5. Prevent erroneous carriage movement when power is turned off. The ground return wire on the terminal block (TB2 in the Hydraulic unit)is split. 1403 CEM 489 6. Eliminate sync checks and failure to space after print when stop key is depressed. 1401 25,000 Series EC CEM 480 1401 10,000 Series EC CEM 488 7. Prevent reset of space skip register when changing forms. 1401 20,000 Series EC CEM 251 S.H.7 1403 HYDRAULIC UNIT REASSEMBLY Any time the Hydraulic Unit is dis-assembled and the Channel Plate Assembly is separated from the Reservoir Mounting Plate, it will be necessary to readjust the input shaft of each pump and the output shaft of the Hydraulic Motor, upon reassembly. Aligning Tool, PiN 450980, is required for re-alignment of the Hydraulic Motor Output Shaft. This tool is available on a loan basis from any Parts Center. Place the Aligning Tool, PiN 450980, around the output shaft of the motor and over the base on the Reservoir Mounting Plate as shown. MOUNTING PLATE \ ---- MOTOR SHAFT\ ,<; /,\"'v -~ ..., (~~\ [~\ \)1 /')1)~, .. /:-... )1/ "\ /' //~- ,/ \P/N 450980 ALIGNING TOOL CARRIAGE FAILING TO MOVE Carriage fail ing to move can be caused by a broken valve stem. The stem falls out of the cylinderwhichcauses the fluid to bypass the hydrau Ii c motor. BELT - YOKE The forms tractor belt yoke assembly can be replaced without replacing the complete belt assembly. This method can be used when the yokesare broken and the belt is not w~rn. SoH. 10 CARRIAGE SYNC POINTS Reference can be made to d Character Chart when programi ng from control op. d Immediate skip to I 2 3 4 5 6 7 8 9 I Channel Channel Channel Channel Channel Channel Channel Channel Channel 0 Channel # Channel @ Channel c 3 4 5 6 7 8 9 . 10 II 12 I space 2 spaces 3 spaces Skip after print to A B C D E F G H I + 0 2 d Immediate space J K L d tl d / S T Channel Channel Channel Channel Channel Channel Channel Channel Channel I 2 3 4 5 6 7 8 9 Channel Channel Channel 10 II 12 After print-space I space 2 spoces 3 spaces S - Space Suppress d- CHARACTER FOR FORMS CONTROL a) The output of the carriage op. register can be used as a sync point to check skip befare or space beforE print operations. After space control can be used as a sync point to check space and skip after printing. b) Sync on +u space skip gate to check setup of the space skip register and the carriage op. register on any programed space or skip operation. c) Sync on-T not start single shot going positive to check the space counter. d) Sync on any of the - T stop brush signal s to check the channel brush encoder and the setup of the channel register. e) The following is a list of sync points and PLD pages: Stage I Stage II & I FC After Space Control 36.47.11.1 36.47.11.2 Carriage OP. Register 36.46.11.1 36.46.11.2 Space/Skip Register 36.42.11.1 36.44.11.2 36.44.11.1 36.47.11 .2 Not Start Single Shot Space Counter 36.44.11.1 36.46.21.2 36.45.11.1 36.42.21. 2 Stop Brush 36.45.21.1 36.42.11.2 Brush Encoder Carriage Channel Register 36.45.31.1 36.43.11. 2 Carri age Channel Reg i ster 36.46.11.1 36.43.31.2 36.42.11.1 36.46: 11.2 Space/Skip Gate S.H. II CHECK VALVES Refer to 11 OI,L FLOW SCHEMATIC;' Page 16. I)a. The purpose of the lower cneck valve is to prevent fluid from the space pump escaping into the skip pump return circuit when the skip stop magnet is energized. b. A defective lower check valve (mounted horizontally in hydraulic unit) will cause slow carriage operation and poor waveform response when checking the hydrou Ii c un i t wi th a tach generator. 2)a. The upper check valve (mounted vertical in hydraulic unit) stops nipping when the carriage transfers from high to low speed. b. A defective upper check valve will cause the detent arm spring to break. Print alignment is nat usually affected by a faulty upper check valve. 15 S.H. II CHECK VALVES (continued) 3) The upper and lower check valves are interchangeable. The valves can be interchanged to aid in trouble shooting when trouble is suspected in this area and none are available. 5 BYDass Valve ets Check Space Pump L"Ir;"'J::~ Drive Shaft OIL FLOW SCHEMATIC S.H. 12 CARRIAGE ADJUSTMENT - DASH METHOD The dash method can be used as a quick way to check the 4.5 M.S. single shot, the EI emitter and bypass needle valve. For a more accurate method in checking and adjusting the hydraul ic unit, the use of the tach generator is recommended. The space and skip needle valves should be checked last. Checking these valves involves removing the cover and actually making adjustment. If an adjustment is made to the hydraulic unit, all other adjustments should be checked. Before proceeding with the following adjustments, the hydraulic unit must be hot. Block the blower input with an IBM Card and put the hydraulic unit in a continuous low speed skip to accelerate the heating of the unit. (Min. 15 minutes) The C.E. will have to feel the unit to determine when it is hot. All adjustments must be made in 6 line drive. A. SPACE NEEDLE VALVE ADJUSTMENT Before making any adjustments, mark the screwdriver slots with a pencil so that you will know where the needle valves were, before adjustments <:lre made. Loosen the locking screw just enough so that the adjusting screw turns hard when making the adjustment. I. Remove the top cover from the hydraulic unit. 2. Remove the forms and insert an IBM card in the tractor to operate the form stop switch. 3. Back the Bypass (BP) needle valve out several turns (loosen locking screws). 4. Put the carriage in a continuous low speed skip. To do this, put a blank IBM card under the carriage brushes and depress the carriage 16 restore key. 5. Loosen the locking screw on the space needle valve. Hold fingers lightly against the detent arm and turn the space needle valve out several turns. Now turn the space needle valve clockwise until detent nipping is no longer felt and the detent is up against the backstop. Watch the tail of the detent for nipping, then to a floating condition, and finally just up against the backstop. Note the difference between machine vibration and nipping. The tail of the detent should have a movement of .040" to .050" if the backstop is adjusted properly. NOTE: After tightening any needle valve locking screw, check that the adjusting screw does not turn. 6) Put the carriage in a high speed skip by programing F l . Adjust the skip, needle valve for the same no nip condition as was done for the space needle valve. Tighten the skip needle valve locking screw. If no nipping is detected after turning out a maximum of five turns, stop the carriage motor by turning off the mainline switch on the back of the printer so that the hydraul ic pumps are not moving. Turn down on the skip needle valve until it is closed. Then back off five full turns on this screw. Tighten the locking screw. B. BYPASS NEEDLE VALVE ADJUSTMENT Insert forms into the mochine and program for a triple space before print, 6 lines to the inch, with dashes in the print area (B bits) F L 2444 at location 444. Put the card on an extender that is indicated in the chart in section C of this service hint to allow printing in flight. By printing dashes the printer will draw an accurate graph of carriage movement. Start the program running and hold down on the detent arm to hold it out of the detent wheel. Adjust the bypass valve for hydraulic stop without bounce. With the BP valve backed out, there should be no hydraulic stop as in Fig. I. Turn the BP valve in until hydroulic bounce occurs as in Fig. 2. Back out on the volve to the point of no bounce as in Fig. 3. When properly adjusted, the triple spaced line will look like Fig. 3. FIGURE I BP VALVE OUT TOO FAR - NO HYDRAULIC STOP To allow printing in flight, the 16 millisecond single shot ond the -T not carriage interlock lines need to be fI oate d . To accompliS I· h t h·IS use teo h ~ II OWIn! . c har t : 1401 Card to be extended Pin to be removed Logic pg. 10,000 series 0lA6 002 P 36.31.21.1 20, OOOseri es 0lA6 B08 G 36.31. 31.2 25,000 series 0lA6 B08 G 36.31. 31. 2 These pOints are the extender Input to the And arcult that feeds the reset gate on the print ready trigger. Adjust the 4.5 millisecond single shot so that the corriage settles down as soon as possible. Least number of dashes before line le{els off. Refer to figures 4,5, and 6. The purpose of this odjustment is to time the electrical stop of the carriage so that when it stops, the detent is in the tooth of the detent wheel. This will allow the carriage to settle as soon as possible, with no motion resulting from the detent. FIGURE 4 4.5 MS SS TOO SHORT - NOTE DETENT PULL IN ------------------------------._---------------------------------- --_ ... --------------~-----~ --J----- - -- --------- ------------------------- -------------€: ----------------~-----~------~-- -------------- -------- ---------------------- --- FIGURE 2 BP VALVE IN TOO FAR- NOTE HEAVY OVERSHOOT -----------------~s:;--=--~- ------- ------------------- ------------------------- ------------------------------- ---------- --- ------------------------------------FIGURE 5 4.5 MS SS TOO LONG- NOTE OVERSHOOT ----------= w ________________• ----- .- ----------------- - - - - - - ---------- ------- ------------- --- ------ ----- ---------------------------------------- ---------------------------------------------- --------------------- --------- ----------- ----------------------------------------- -===-======-====-======~----==~::=------------ =======================~===::=::;--=========--~== -- - -----------------------:=- --=----------------- - FIGURE 3 PROPER BP VALVE- NOTE LEVEL PRINTING BEFORE DRIFT ------------- - ------ ------------------==-------- ----------------= ---------== ------------- ---------- -------- --~~;S:- -==-:;---- FIGURE 6 4.5 MS S5 CORRECT - NOTE SLIGHT OVERSHOOT -------------------------------------------------- ----------------------------------------------------------------C. A QUICK CARRIAGE ADJUSTMENT CHECK FOR SINGLE SPACE. Program a single space print loop (2444 at location 444), 6 lines to the inch, with daSlies rB bits) throughout the prinf area. --------- ------ -f .-- ~== -- ----- ============:~--=~===~==-=:~~~~~=-=-=-===-==== --------------------------------------------------------------------------- -------------------------------------------------------------------------17 D. EMITTER ADJUSTMENT When double or triple spacing or skipping the emitter controls the stopping of the carriage. Therefore the emitter must be timed to the detent, as the 4.5 millisecond single shot was. Program a triple space before print, six lines to the inch, and print all dashes (FL2444). The 16 millisecond single shot and - T not carriage interlock lines need to be floated as per the chart in section C of this servi ce hint. Check for proper brush tension and short strands before adjusting the brush type emitter. Refer to S.H. 3. Adjust timing of the emitter brush so carriage motion stops as soon as possibl e. Least number of dashes before line levels off. See figures 7, B, and 9. The final setting of the emitter adjusting arm should be a compromise between slight pull in at 8 lines per inch double space and slight overshoot at 6 lines per inch tripl e space. Better scope pictures are available in the 1401 after the integrator card than from the two test hubs on the 1403. FIGURE 7 EMITTER BRUSH EARLY- NOTE DETENT PULL IN -----------------------~-----::;----------------------- FIGURE 8 EMITTER BRUSH LATE- NOTE OVER SHOOT -------------------------------------- - ---- -----(---=-,-------- FIGURE 9 EMITTER BRUSH TIMED CORRECTLY ___ u _ ( __ -- , - - - - -=._------------------------------------------18 E. CARRIAGE TAPE SPROCKET ADJUSTMENT Before timing the sprocket, check the carriage tape transport mechanisms. The brush separator should be .050" ~ .010" from the contact rolls. Contact rolls must turn free. Be sure that no binds exist when you manually turn the forms advance knob with the 6-8 knob in neutral. Drive sprocket must be in I ine with contact rolls to prevent carriage tape skew. A collar is provided to maintain alignment of sprocket. Rapid wear of the carriage tape sprocket holes indicates the tape transport is out of adjustment or the sprocket is cracked. 1403's prior to A2 suffix have a narrow tape drive sprocket. If difficulty is experienced in feeding carriage tapes, installation of the wider sprocket, Part /1474019, will assist in increasing the life of carriage tapes. Carriage brush timing should be adjusted with a new carriage tape as follows: Tape should be punched on customer's carriage tape punch. NOTE: In low speed, the carriage stop brush should make I mill isecond -: 1/4 before the em i tter brush. If machine has a magnetic emitter, the carriage stop brush should make 1..5 milliseconds +1/4, -0 before the emitter pulse. Note all 12 channels stop brushes must meet this timing relationship to EI. Break of EI should not overlap the stop brush break. Refer to S.H. 3 for brush type EI. I. Insert a carriage tape with a channel one punched on every third line. Remove forms and insert IBM cards to actuate the forms check switches. Engage the clutch in 6 line drive. Program a space to zero (no numeric bits) before print. F B bit 2 444 at 444. Clear the print area to C bits. This wirr put the carriage into a low speed skip. 2. Sync the scope on" - T Stop Brush I" and look at "-T Emitter brush". These test points are located on the front of the printer. Loosen the shaft expansion screw and rotate the tape drive sprocket with respect to its shaft to obtain the proper timing. To increose expansion of shaft for any given screw torque, apply a small amount of IBM 70 Lubricant to taper surface of the screw. Tighten the shaft expansion screw with the 10" screwdriver. Be certain the screw does not bottom. Whenever tape drive sprocket is changed for brush timing, check alignment of tape to contact roll shoulders. The tape guide bracket must not project above drive sprocket at any point or it will lift tape up on pins, causing accelerated tape wear and skipping problems. F. 16 MILLISECOND INTERLOCK SINGLE SHOT TIMING Re-install card previously put on an extender to restore machine to proper operation. Subtract the timing of the 4.5 m.s. single shot from 21.4, which is the maximum time allowed for spacing (actually it is 21 .6 but use 21 A fo'r safety). Sync on start and set 16 m.s. ss. to time out 21.4 m.s. from start of sweep. Measure single shot timing at midpoint of waveform. Since the 4.5 m .s. s.s. may be over 5 m.s. for proper operation the 16 m.s. s,.s. moy be less than 16 m.s. The sum of the two must add to 21.4 m.s. The 10m .s. single shot should be adjusted,to 1.7 m.s less than the 16 m.s. single shot. Sync on start and set 10 m.s. s.s. to time out 19.7 m.s. from start of sweep. S.H. 13 CARRIAGE SERVICE INFORMATION AND USE OF TACH-GENERATOR- IBM 1403 Service Aid: The Hydraulic Unit should not be dismantled unless trouble is positively traced to this area. If disassembly is necessary, extreme cleanliness must be observed when reassembling components. Never wipe the fluid filter with cloth of any type. The filter pores will clog, reducing fluid pressure and cause carriage failures. A spare Reservoir Gasket Assembly, PiN 444337, should be available prior to disassembly of this unit. The Tach-Generator is used to convert the mechanical motion of the carriage into an electrical output for scoping purposes and is the most accurate method of checking the Hydraulic Unit. Before using the Tach-Generator, check adjustments of space and skip needle valves as outlined in S.H. 12. TACH-GENERATOR AND SCOPE CONNECTIONS I. Connect 1.0 MFD, 200 volt capacitor, PiN 253826, across Tach-Generator output terminals. 2. Remove Paper Advance Knob, from upper Tractor Drive Shaft. Install Tach-Generator and coupl ing on shaft as shown, and tighten set screw. atively square corner follawed by carriage drift verifies correct bypass adjustment. Important: As little as 1/4 turn from correct setting for bypass needle valve can produce incorrect scope and pencil trace, as shown in Figure 10 and Figure 12. The pencil trace is the most accurate method of checking the bypass needle valve adjustment. It should be used alang with the tach-generator method. FIG 10 BY-PASS ADJUSTED TOO LOOSE (1/4 TURN) If' UPPER TRACTOR DRIVE SHAFT ASM. '~ «~ HYDRAULIC COUPLING PiN 451290 TACH-GENERATOR PiN 450976 --- ~ ~ I:":\. I " IL- ' '-f-' ~ ~ 1- ~ NO HYDRAULIC STOP ~ ('~ 3. Ground the scope and connect vertical input and scope ground to Tach-Generator terminals. 4. Sync scope on impulse to space start. magnet, terminal 2, Resistor 4, Logic Page 02.01.1 Resistor 4 is mounted on heat sink behind hydraulic unit. R4 is the fourth res1stor down and Terminal 2 is on the right side of resistor facing rear of machine. If a dual input scope is available, use impulse to space stop magnet Terminal 2, Resistor 3, as second input to scope. On single input scopes, two signals may be examined separately in relation to start magnet impulse. NOTE: A defective capacitor or one of incorrect rating, will alter Tach-Generator output trace on scope. Capocitor should remove high frequency oscillation from scope trace without affecting pulse timing. Check by noting pulse timing with capacitor in and out of circuit. A. ADJUST THE BY-PASS NEEDLE VALVE Before proceeding with the following adjsutments, Hydraulic Unit must be hot. Block the blower input with an IBM cord and put the hydraulic unit in a continuous low speed skip to accelerate the heating of the unit. (Min. 15 minutes) The C.E. will have to feel the unit to determine when it is hot. All adjustments must be made in 6 line drive. Nate: Carriage response time should be 3-4 m.s. when starting and stopping. I. Set up program for triple space loop with C bits in the print area. Example: 2 F444T at location 444. -2. Engage manual clutch in six lines-per-inch position. 3. Loosen Bypass Needle Valve Lock Screw just enough to permit odjusting needle valve. 4. Disengage detent arm by pressing down in the notch, with a large screwdriver. 5. Block Forms Switches and run printer program, observing the scope. (No paper required). 6. Adjust bypass needle valve for scope trace down in Fig. II. Back bypass valve screw off 1/12 turn. Tighten bypass lock screw. Double check adjustment by making pencil trace, shown in Fig. II. Combination scope trace indicating light hydraulic bounce and pencil trace of rel- BY-PASS ADJUSTED CORRECTLY FIG II / II I~ r-~ 1\ I~ ~ I- t-I POWER TRIPLE SPACE rHYDRAULIC STOP I CARRIAGE DRIFT FIG 12 BY-PASS ADJUSTED TOO TIGHT (1/4 TURN) L ~ C\. I 12 ~ ,... ~ "·-1 .... I~ ..r:7 f II [I (2V1CM)(5MS/CM) rHEAVY HYDRAULIC BOUNCE 19 ADJUST SINGLE SPACE SINGLE SHOT I. Set up program for singl e space loop at six Iines per inch with dashes throughout print area. Example: 2 444 in Location 444. 2. InitiaTI y set 16 millisecond single shot to 16 milliseconds. 3. Adjust 4.5 millisecond single shot for minimum time from start of trace (carriage space start impulse) until scope pattern indicptes tractor shaft movement has sett Ied down. (Fi gu re 13) 4. Sync on start and set 16 m .s. s.s. to time out 21.4m . s. from start of sweep. 5. Sync on start and set 10 m .s. S.s. to time out 19.7 m . s. from start 0 f sweep. NOTE; The end of 16 millisecond single shot trace should be measured at the midpoint of the negative going pulse. Now check fhe 01 ignment with dashes, (single s;->ace, 2 444 ). Sight along line of print to observe alignment. Record settings of each singl e shot on the logics for future reference. Single Shot Timing for 600 Lines Per Minut" NOTE: The 14'03 must be capable of printing 600 lines per minute using a print ond branch instruction. It must print, move paper, and be ready to print again in 100 milliseconds. The carriage start magnet is impulsed at beginning of 48th print scan. 21.6 milliseconds is the maximum allowable time from beginning of scan 48 (paper movement) until scan of the next Iine is initiated. B. SINGLE SPACE TIMING SEQUENCE I. Start of scan 48 impulses the carriage start magnet and "4.5 millisecond" single shot simultaneously. 2. When "4.5 Millisecond" single shot times out the space stop magnet and the 16 MS singl e shot are impulsed simultaneously. 3. A PSS pulse coincident with PSS Ring 3 after the 16 MS single shot times out signals start of next line of print. The Sum of the"4. 5 mill isceond" single shot and the "16 millisecond" single shot settings must not exceed 21.6 to insure 600 Iines of print per minute. To be safe, use 21.'4 milliseconds. r- f SCAN 48 PSS PULSE - IMPULSE TO SPACE STARTSTART 4.5 MS SINGLE SHOT 4.5 SINGLE SHOT TIMES OUT- SPACE STOP IMPULSEDSTART 16 MS SINGLE SHOT 16.0 MS SI NGLE SHO T TIMES OUT - NEXT PSS PULSE 2IAMS-i STARTS PRI NT SCA N I OF NEXT LINE ~, ± .. h I~ --- .... I --- ,--- ,---- I """ ~ +: 1 1---- f--- - - - f--- 7 1\ d-~ FIG. 13 1""'-"" SINGLE SHOT SET AT 6.0 1-' r' SINGLE SHOT SET AT 6.8 HEAVY OVERSHOOT; 30MS TOTAL TIME FROM SPACE START SIGNAL UNTIL TRACTOR SHAFT MOVEMENT IS STOPPED \. ,\ T HEAVY PULL-IN; 24 MS TOTAL TIME FROM SPACE START SIGNAL UNTIL TRACTOR SHAFT MOVEMENT IS STOPPED NEARLY SQUARE CORNER \ 17 MS TOTAL TIME FROM SPACE START SIGNAL UNTIL TRACTOR SHAFT MOVEMENT IS STOPPED v~ ~ 1 SINGLE SHOT SET AT 4.6 (2V/CM) (5MS/CM) SINGLE SPACE - 6 LINES PER INCH ADJUSTMENTS OF THE 4.5 MS SINGLE SHOT Co ADJUST THE EMITTER (EI BRUSH OR MAGNETIC EMITTER) I. Set emitter brushes for projection beyond brush holder of 23/32" plus or minus 1/64". 2. Set up program for triple space loop at six lines per inch with dashes throughout print area. Sight along line of print to observe alignment. Example 2 F 444 T in location 444, 3. Run program and observe scope trace. 4. Shift emitter adjustment arm to abtain least time to settle tractor shaft movement shown in Fig. 14 20 NOTE: A penci I trace may indicate overshoot, pull-in, or square, but best print alignment occurs with adjustment 4. The em i tter may 01 so be rotated wi th respect to the shaft to obtain EI adjustment. 5. Change program to double space laop at eight Iines per inch with dashes throughout print area. Example: 2 F 444S in Location 444. 6. Run program and abserve scope trace. 7. Shift emitter adjustment arm to obtain least time to settle traclor shaft movement shawn in Fig.15 r- f SPACE START IMPULSE SPACE STOP IMPULSE - E I BRUSH CONTROLLED - STARTS TIMING OUT "16MS" SI NGLE SHOT -"16 MS" SINGL E SHOT TIMES OUT - PRINTING MAY BEGIN WIT H NEXT PSS PULSE .! -'"'I ~ ,- r-- '- v- .- V EI SET CORRECTLY 8 MS FROM STOP IMPULSE UNTIL TRACTOR SHAFT IS SETTLED 1\ ~ ~ r r....-, / V TRACE SHOWS PULL-IN 19M5 FROM STOP IMPULSE UNTI L TRACTOR SHAFT IS SETTLED \ ... " I~~ E I SET EARLY 1\ ,~ ~ .... ~ V 1\ -- 1\ hJl ~ FIG. 14 "~ F EI SET LATE TRACE SHOWS OVERSHOOT 23 MS FROM STOP IMPULS~ UNTIL TRACTOR SHAFT IS SETTLED """" (2V/CM) (5MS/CM) E I BRUSH ADJUSTMENTS FOR TRIPLE SPACE 6 LINES PER INCH r- SPACE START IMPULSE [SPACE STOP IMPULSE - E I 8 RUSH CONTROLLED-STARTS TIMING OUT" 16 MS" SINGLE SHOT r "16 MS 1\ SINGLE SHOT TIMES OUT - PRINTING MAY BEGIN WITH NEXT PSS PULSE ~ I~ E I SET TO BEST CONDITION n 12 MS FROM STOP IMPULSE UNTIL TRACTOR SHAFT IS SETTLED \ K 1/ I:.)~ .... FIG.15 ~ .- EI SET EARLY 19 MS FROM STOP IMPULSE UNTI L TRACTOR SHAFT IS SETTLED 1\ ~ ~ ia. (2V/CM) (5MS/CM) EI BRUSH ADJUSTMENTS FOR DOUBLE SPACE 8 LINES PER INCH 21 as shown in S. H. 12 and 13, investigation should be made further by the C.E. Incorrect waveforms are a definite indication of trouble and these symptoms should not be overlooked. Refer to S. H. 6 for erratic carriage behavior. Refer to Figure 16 for expected scope trace in skip operation. NOTE: Final setting of emitter adjustment orm should be for the least time from the stop impulse until the tractor shaft movement is settled, compromised between triple space six lines per inch and double space eight lines per inch. D. Adjust carriage tape sprocket as per S. H 12E. If when checking hydraulic carriage adjustments using the Tach-generator, the expected wave forms are not 0 SPACE r B SKIP START IMPULSED SKIP STOP IMPULSED BY SLOW BRUSHES (E I CONTROL) [ rv. I .{ q r SPACE STOP I MPULSED BY STOP BRUSHES (E I CO N TROll "16 MS" SINGLE SHOT STARTS TIMING OUT , " . ,\. , - 16 LIN E SKI P c, (2V/CM) (10 MS I CM) \ ..... ... ,. I 1\ •• , L&WdLt. ... 33 LINE SKIP (2V/CM) ~ ....... h . (20MS/CM) k- "-...... l1li I I\. l'n' i - dt.tt, ,u 1m l- +- += , ,-1-, , .. 66 LINE SKIP (2V/CM) .. (20MS/CM) ~ \ FIG. 16 TACH -GENERATOR TRACES ON SKIPPING OPERATIONS SoH. 14 SPECIAL SKIP CASES I. SINGLE LINE SKIP FAILURES: Check EI, 4.5 m.s. and 10 m.s. single shot timings. Refer to S. Ho 12 or 13. The 10 m .s.s.s. should be 1.7 m.s. less than the final setting of the 16 m .s. single shot. The 2005 diagnostic checks single line skip. The following is a brief description of special skip operations. II.SINGLE LINE SKIP A. If a 5 hole is under the channel brush and a skip to 5 instruction occurs, a skip of I line will take 22 ~ place. NOTE: 5 hole is used as an example. I. Because the channel register does nc;>t set up until the carriage is signalled to move, the carriage can start at slow speed. 2. EI Emitter and carriage interlock on is needed to read into channel register. 3. Skip instruction will turn on carriage interlock and EI emitter will read 5 into channel register. 4. Camp skip equal will be signalled but carri a~e has al ready started. 5. After 4.5 MS, the E2 brush line is activated and turns on Stop S.S. SoHo 16 SPECIAL TOOL The following is a method to make a 3/16" allen head tip to fit the ratchet screwdriver handle when the special tip is not available. Grind down a 1" piece of a 1/4" allen wrench to fit a 3/16" allen heed. The shank should be 1/4" so that it will fit the ratchet screwdriver handle. This special tip will be used to remove the four/alve block holding screws. III. NO LINE SKIP A. If a skip is signalled and the carriage is already at that point. I. Skip 5 and there is already a 5 in the channel, register. 2. As scon as skip code comes up, the comp skip equal will prevent turning on Start SS. 3. Also comp skip equal will turn on Stop S5 to reset carriage op reg. and space skip reg. on Skip Before Op. 4. On a Skip After operation the line Gate Sp Sk Reg prevents Comp Skip Equal from firing the Stop SS a. Sp Sk Gate resets the Channel Reg and this drops Compo Skip Equal. b. This leaves the Carriage Op Reg latch and the Space Skip latches on so that on scan 48 a sk ip operation can start. C. This also allows form to form ejection. S.H. 17 FORM CONTROL DIAGNOSTICS Run carriage diagnostics. This usually is a fast method in determining exact type of cardage failure you are experiencing. The following is a list of the 2,000 series Forms Control Diagnosti cS. A. 2000 FORM SPACING I. Test all types of spacing singly and in combination. B. 2005A SINGLE LINE SKIP TEST I. Test single line skip operation to all channels. 2. Test the interlocking of the branch on 9 or 12. NOTE: Run 2020C diagnostic before 2005 diagnostic. C. 2,010 FORMS SKIPPING (high and low speed) I) Tests skips to all channels using 6,14, and 22 spaces. 2) Tests no line skip. 3) Tests single item eject. Do 2012 HIGH SPEED SKIP AND SINGLE ITEM EJECT I) The carriage skips at high speed to a given channel (all channel s are tested). 2) The carriage does not skip when it is sitting at the channel called for and a skip before print is given (all channels are tested). 3) The carriage does skip when it is sitting at a channel called for and a skip after print is given. (A skip to 2 is used to check this circuitry). E. 2020C CHANNEL 9 AND 12 LATCH TEST F. 2030C CHECK SPACE SUPPRESSION 0 SoHo 15 VALVE BODY REMOVAL Refer to 1403 Reference Manual for standard removal procedure. The following is a quick method of removing the valve body assembly, to replace broken valve stems or making valve stem adjustments. This method is a time saver and is recomended when working on the hydraulic unit, part # 444325. This style has the reservoir holding screws on the inside of the 1403. This method is also feasible with hydraulic reservoir, part # 475102. It saves replacing the gasket. Estimated time for removing the valve block assembly is 25 minutes. Special tool needed is a 3/16" allen head tip to be used with the ratchet screwdriver handle. I. Drain oil out of the hydraul ic unit. 2. a. Remove reservoir top cover. b. Remove leads to magnet coi I. 3. Remove the two top screws that hold the exhaust baffle. Gently pivot the baffle to attain access to the valve block holding screws. 4. Use ratchet screwdriver handle with 3/16" allen head tip. Remove the two bottom screws and then the two top screws. The block is now free to be removed from the hydraulic unit. A standard 3/16" allen wrench can be used to loosen the screws, if the screws are found too tight to start. CAUTION: Extreme care should be exercised when working on the reservoir unit. The access hole may have sharp edges. S.Ho 18 PROCEDURE TO SCOPE SLOW BRUSHES A. Punch a tape using all channels. B. Clear print area to C bits. Program F B bit 2 444 location 444. C. Remove carriage block cover to scope brushes. D. See 1403 reference manual for "Static Adjustment of Carriage Tape Brushes." E. Check to see that corresponding latches turn on with make of slow brush and off with the make of the stop brush. TERMINAL BLOCK LOCATION CHART TB NO/ NO TER. W.D. LOC. DESCRIPTION PHYSICAL LOCATION TB NO/ NO TER. W.D. LOC. DESCRIPTION PHYSICAL LOCATION Machine Pan- Rear Near Fuse Panel 7 6 01.09.1 Chain Motor Left end of "T" casting -inside Carriage Magnets Under Hydraulic Reservoir Cover 8 2 01.07.1 Chain Motor Thermal Left end of "T" casting -inside 01.07.1 Forms Switches & Hammer Unit Thermal On left side frameInside at top 9 4 01.09.1 Hydraulic Unit Blower (50cy. only) On manifold assembly left side of machine 4 01.09.1 Hammer Unit Blower On Motor Frame, upper right rear of machine 10 5 01.07.1 Upper Forms Switches On translatar framebehind upper tractors 5 2 01.09.1 Ribbon Motor Right side of ribbon drive assembly II 5 01.07.1 Lower Forms Switches On translator framebehind lower tractors 6 4 01.08.1 Ribbon Clutch Coils Right side of ribbon drive assembly I 10 01.05.1 DC 2 8 02.01.1 3 4 4 Input Vol tages 23 S.Ho 19 CARRIAGE CONTROLS - (SCOPING) A. Depressing the carriage space key enables scoping of the following: Sync internal to see output of the single shots. Refer to the figure below. I. 80 us. start singl e shot. 2. 4.5 m .s. single shot. The timing of this single shot is variable (4-9 m.s.) The sum of the 16 m .s. and the 4.5 m .s. single shots should not exceed 21.4 m .5. for 600 line per minute printing. 3. 10 m.s. carriage interlock single shot timing should be 1.7 m.s. less than the final setting of the 16m.s. single shot. 4. 10 us. stop single shot. B. Depressing the restore key enables checking of the following: Refer to Restore Key Chart, Page 26. I. Channel Register reset (10 us.) 36.43.21 2. Channel Register 9 and 12 reset (10 us.) 36.43.21 C. Depressing the carriage stop key enables the checking of the 9 m.s. single shot. SPACE KEY OPERATION SPACE KEY .J L SPACE LATCH ..J L I START S. S. (80 us ss ~ss STOP S.S. (10 US) * 4.5 MS. S.S. EMITTER BR #1 :rt;;.!ous ;::1"1:: IOU S I .J ,, , L I I , , I I START a STOP s,s. ' ( IMPULSED AT SAME , TIME - CARR. INTLK. DOES NOT COME ON I UNTIL STOP 5.5. TIMES OUT. I I E2 TRIGGER SPACE CTRL. , COMPo SPACE EQUAL , CARR. INT LK. LATCH .J, RESTORE OP. REG. 6 SP. SKP. REG. n I , I .J L- SPACE AFTER LATCH .J SPACE MAGNET (START) ...J LI L- TIMINGS MAY NOT BE 4.5 MoSo PROCEDURES ( I SPACE SK. I LATCH * 24 I --1"'L-.-.. , I .::J"1:;; IOU S ~ II L : SPACE MAG. OFF I --1"'L-.-.. I 4.5 MS. DRIVEN + CARRIAGE~ENTS II MS. - COASTING \ REFER TO S.Ho 12 and 13 FOR ADJUSTMENT --"- " III. EMITTER OUTPUT a. Disconnect black and white leads from transducer to terminal 8 and 9 of cmp ifier card. Connect the white lead from transducer to the scope probe, and connect the bl ack Iead to the scope ground. With the Emitter wheel operating continuously at low speed, the wave form must appear as shown in figure 2, with an output of 2 to 4.5 vo Its peak to peak. S.H.20 MAGNETIC EMITTER ADJUSTMENT The following procedure is provided to assist in adjustment and trouble analysis: I. EMITTER WHEEL LOCATION a. The emitter wheel should be located .010" to .020" from the nylon bushing as shown in fig~ c-re I. / SHARP CHANGE ./' SHOULD BE HERE 2V MIN. . 010" - .020"~ 475928 4.5 MAX • NYLON \\ FIGURE 2. EMITTER WHEEL 804629 I I 804624 I _/ -- ---- t ----~ TRANSDUCER ASM. 804618 804625 EMITTER ARM SPRING SCREW 438564 ADJUSTING BLOCK 473946 FIGURE I. II. TRANSDUCER AIR GAP ADJUSTMENT a. Loosen transducer clamp screw and adjust transducer for .008" clearance to the Emitter wheel. Refer to figure I. NOTE: This adjustment may be varied to a minimum oJ .002" to meet the specified transducer output of 2 to 4.5 volts peak to peak. For example: An increase in air gap will reduce the amplitude of the transducer output and the duration of the EI pulse. NOTE: To operate continuously at low speed place an IBM card under stop brushes and depress Restore Key. b. Reconnect the white lead to terminal 8 and black lead to terminal 9. If the wave has a rapid rise to the positive pulse and a slow drop to the negative pulse, reverse the leads when reconnected to the terminal block to obtain the correct wave form. c. With all Ieads connected and the Em i tter wheel operating continuously at low speed, check the amplified output at EI sync point or terminal I on the amplifier card for the following: I. -8 volts minimum (normally -12 volts). 2. 1.1 to 1.5 milli-seconds duration. 3. 2 to 30 micro-seconds rise time. 4. I to 30 micro-seconds fall ti:ne. d. Timing of the Emitter with the tachometer generator is recommended. See S.H, 12D & 13C. NOTE: Timing of the Magnetic Emitter is altered by adjusting the Emitter adjusting arm )P/N 804625) in the same manner as for the brush type Emitter. (See figure I). Timing should be adjusted to obtain the least time to settle tractor shaft movement, compromise between triple space, six lines per inch, and double space, eight lines per inch. e. Adjust the carriage tape sprocket so the tape brushes make I .5+ .25 -0 mill i -seconds before the E,citter pulse. The adjusting procedure is the same as with the brush Em itter. Refer to S.H. 12E. NOTE: All 12 channel stop brushes must meet the above tim ing relationship to EI Magnetic Emitter. S.H,21 BROKEN VALVE STEM The 1st indication of a broken valve stem is continuous spacing with the machine not in operation or program running. If a broken valve stem is suspected, the top cover of the hydraulic unit should not be removed unless the hydraulic drive motor is turf.1ed off and valve stems checked. A broken valve stem can cause hydraulic fluid to spirt out the top of the valve assembly. Refer to S.H. 15 for removal procedure. S,H,22 VALVE STEM LOCK NUTS The lock nuts on the top of the valve stem can be checked without removing the valve block assembly. The valve block assembi y must be removed to check the lower val ve stem lock nuts. Refer to S. H. 15 for removal. 25 RESTORE KEY SPACE KEY SPACE KEY I TURN ON SPACE LATCH TURN ON SPACE REST CONTROL TRIGGER BY SPACE LATCH ) BY RESTORE LATCH I TURN ON START SINGLE SHOT 80 US TURN ON START SINGLE SHOT 80 US I TURN ON STOP SS - 10 US BY SPACE RESTORE CONTROL TRIGGER TURN STOP SS 10 US SET SPACE SKIP REG TO I BY SPACE RESTORE CONTROL TRIGGER RESET BY STOP 55 ~--I RESET BY STOP SS I SET CARR OP REG TO SP AFTER ~ESET TO BY STOP 55 RESET BY STOP SS I AFTER STOP 55 TIMES OUT TURN ON CARRIAGE INTERLOCK LATCH TURN ON CARR INTLK LATCH AFTER STOP SS TIMES OUT I ENERGIZE CARR START MAG ENERGIZE CARRIAGE START MAGNET I TURN ON 4.5 MS 55 TURN OFF SP REST CONTROL TRIGGER BY START 55 WHEN START 55 TIMES OUT I WHEN START 55 TIMES OUT TURN OFF SP RESTORE CONTROL TRIGGER AFTER 4.5 55 TIMES OUT I READ I HOLE IN CARR TAPE 4.5 MS SS TIMES OUT I CARR SHOULD HAVE MOVED 1/2 LINE BY THIS TIME E2 BRUSH SIGNAL I TURN ON SPACE CONTROL TRIGGER I RESETS SP/SKIP REG AND CARR OP REG COMP SP EQUAL I TURN ON STOP SS I TURN OFF CARRIAGE INTERLOCK LATCH I ENERGIZE SPACE STOP MAGNET 26 I * TURN ON BY SP REST CNTL LATCH PRINT QUALITY SERVICE HINTS S.H.23 DENSITY VARIATION (LIGHT PRINTING) This can appear in many different ways: A. When irregular sections or spots appear more dense (Figure 17), look for excessive oil in the ribbon. Wipe off all excess oil, ink, etc. from the carriage, Tcasting, and ribbon shield. Ublb~u12345- 06789012345- I. -54321098760 -54321098760 J. 122?~?A~~~'"-2·---~?-23DD32-2029ZH27?62~242122~lOlO FI G. 17 Density Variation (Irregular) Observe the quantity of oil imparted to the ribbon from the chain-lubrication system. A nominal amount of oil does not greatly affect the print quality. Excessive amounts, however, couse a definite problem because of the growth in stroke width and fuzzy edges of the printed characters. If excessive oil is present in the ribbon or around the print area in general, observe the following: I. Use care when fill ing the chain reservoir or when oil ing the ribbon-drive motor. Oil can drip because of a pressure buildup in the motor (see figure I, 1403 Reference Manual) 2. I f the chain throws an excessive amount of oil, form the wiper (P/N 474083) so that it just touches the back of the chain. Refer to S. H. 45. B. Sometimes when changing from short-line printing to a longer I ine, the characters at the beginning and end portions of the I ine of print are more dense than those, at the center of the document (Figure 18). This can be caused by the unused (more heavi Iy inked) portions of the ribbon. 1222324252627? 8292 0 z-? [II! 2-? 02 'J 28 27262') 24 ?l22 217184 12223242576272829202-20n2-20292827/625242322217184 1222 32 42 5262 72 8292 02-2 [In?- 2 02928272625242322217184 12223242526272829202-2002-202928272625242322217184 12223242526272829202-2002-202928272625242322217184 12223242526272829202-2 00 2-202928272625242322217184 12223242526272829202-70 0 2-202928272625242322217184 FI G. 18 Density Variation C. The ribbon shield may be damaged or out of adjustment. Refer to Ribbon Shield and Print-Line Indicator Adjustment in 1403 Reference Manual. Check for sharp edges on the ribbon shield. D. If density variations exist in groups of 22, check the corresponding impression-control pads. Refer to 1403 Parts Catalog Fig. 23 Ref. 65. E. Worn magnet-armature pivots can cause difficulty in timing and density. This requires replacement of the magnet-and yoke assembly. F. The hammer-magnet coils can come unglued from the yoke. This can cause light density and late timing. Check magnet coil for low resistence. (Alpha-numeric 8. J;: .4 ohmsXNumeric 4.0 ± .2 ohms) measured with coil disconnected from circuits. When measured from output pin of hammer driver card to pin P (-60 volt return) the reading will be II and 6 ohms (app.) G. A broken or damaged strip residual or fastening band can cause density variation. A worn residual on a machine without the strip residual requires installation of field B/M 485145 or B/M 485348. H. When replacing an armature an a machine that has strip residuals, beware of old-style armatures with the individual residual. K. Loose platen bond. This can cause light printing at either or both ends. To check: I. Remove the chain cartridge. 2. Remove the cartridge bottom guide plate. 3. Press on the platen. If oil oozes from between the platen and its bond, replace the cartridge. (When pinned cartridge are used, replace only the cartridge center-bar assembly) . Check for sticky oil and dirt on the hammer rebound damper bar and the armature tail where they meet. This can cause highly intermittent late timing or light density the first time a hammer is used after a period of no use. The damper bar is easily removed from the rear of the machine for cleaning. Refer to 1403 Parts Catalog Fig. Ref. A4. Improper chain tension. I. Hold the cartridge with the printing side up. 2. Move the chain about two passes in the normal running direction to be sure that the chain assumes a natural sag from the center plate. 3. The slugs in the center of the cartridge should hang out 1/16" + .020" - .000" to assure proper chain tension (see Figure 5 1403 Reference Manual). 4. Adjust the cartridge on current machines by loosening the jam nut and turning the idler adjusting screw. Refer to Lower Plate to Cartridge Assembly. 1403 Reference Manual. L. Check for proper setting of the density Iever and the timing dial. Check for proper forms insertion. M. I. A fading across the print line indicates that the hammer unit is not parallel to the chain cartridge. 2. T-Casting latch (1403 Fig. 15 Ref. A2 Part # 474062) gradually cracking and gradual yielding can cause the loss .083 dimension between hammer and type faces. The latch shou Id be inspected to determine if it is bent or cracked and replaced. Refer to CEM 573. Refer to Horizontal T-Casting Positioning (Chain to Hammer). 1403 Reference Manual. N. HAMMER SPLAY (change in clearance from hammer to hammer). Replace the individual hammer assembl ies to correct a splayed condition. Do this before timing ond densityadjustments. (See Adjusting Individual HammerMagnet Assemblies for Timing and Density). 14(3 Reference Manual. O. ERRATIC-PRINT DENSITY On difficult-to-analyze erractic-print-timing problems, inspect for worn chain-drive gears (excessive backlash) or a worn chaindrive sprocket or drive key. If certain hammers or groups of hammers exhibit timing problems only on certain characters; inspect for a damaged or defective timing disk. P. Bent nose cone can cause density variation. The nose cone is of soft material and can be straighted. S.H. 24 LIGHT TOPS OR BOTTOMS If all characters that are printed have light tops or bottoms, look for tilting of the hammer unit while you tighten the locking bolts. Check the hammer mounting bar. Inspect the surface that seats against the hammer unit for burrs or foreign matter that would prevent proper seating. If one position is printing I ight tops or or bottoms, check for a broken hammer. 27 S.H. 29 SLUR Refer to the area marked B in the enlargement (Figure 22) This is caused by hammer-chain speed relationship and the weight of the document used. This condition is accentuated when card stock or other heavy stock is used. Adjust the paper guides for minimum slur. S.H. 25 HEAVY STROKE WIDTH Figure 19 shows an example of heavy stroke width and extraneous particles. This condition is most prevalent in early ribbon life. You can compensate by using a lighter impression during early stages of ribbon life. This causes lighter printing on carbon copies of multiple documents. 16263646566676869606-6-6006-6-606 S.H. 30 WAVY PRINTING (HORIZONTAL MISAlIGN MENT) To correct faulty spacing, skipping, or horizontal alignment, refer to service hints and charts. 16263646566676869606-6-6006-6-606 16263646566676869606-6-6006-6-606 FI G. 19 Heavy Stroke Width S.H.31 Smudge printing can be caused by a broken ribbon shield wire. Refer to Ribbon Shield and Print Line Indicator Adjustment (1403 Reference Manual) S. H. 26 LIGHT STROKE WIDTH- ALL CHARACTERS Figure 20 shows an exampl e of Iight or narrow stroke width. This occurs at the end of ribbon life. CARTRIDGE MOUNTING S.H.32 Use care when installing cartridges that are mounted with four cap screws (standard cartridge). Move the cartridge toward the front of the machine while tightening the screws. This prevents possible change of the hammer-to-cartridge relationship if the cartridge loosens for any reason. The interchangeable cartridge is self-aligning. 111111111111111111111111111111111 1111 1 1 1 1 1 II 1 1 11 1 1 11 1 1 1 1 11 11 1 1 1 1 1 1 112131~151~171~1~lr1-1nr1-1nl11~1 1121311.15161 !l3 1'1101 - ll1n 1 - F) 1 'J I P 1 FI G. 20 Light Stroke Width S. H. 33 Paper guards (Part No.473719 & 473720 ) can be removed if stapled forms are not used. S.H.27 LIGHT STROKE WIDTH-INDIVIDUAL HAMMERS Figure 21 is an example of light or narrow stroke width at the left edge of individual characters, column 2 of each line. Correcting this condition requires individual hammer timing adjustment. Refer to Adjusting individual Hammer-Magnet Assemblies for Timing and Density. 1403 Ref. Manual. S.H.34 The nase cone can be shimed .015 to prevent card stock forms catching on the hammer. NOTE: This puts form closer to the ribbon and may cause smudge on heavy multiple forms. -05555555555555555555555555555555 -05555555555555555555555555555555 CHAIN CLEANLINESS S.H.35 The type chain must be clean and free of loading in the lakes of characters such as 8 or O. Check for pits or breaks in type faces. Clean the chains that are dirty or loaded with oil by printing all characters against type cleaner (see On-Cartridge Cleaning). If the chain is extremely dirty, perform OffCartridge Cleaning. -015253545556575859505-5005-50595 -015253545556575859505-5005-50595 -015253545556575859505-5005-50595 FI G . 21 Light Stroke Width, Individual S.H.28 PHANTOM PRINTING (Printing unwanted character that is the next in sequence on the chain .150 away from the desired character). Refer to the area marked A in the enlargement (Figure 22) This occurs because of the stiffness of the document. It is encountered when printing on card stock or other heavy forms. Adjust the paper guides and use a lighter-inked ribbon to minimize phantom printing. S.H. 36 A. IDENTIFICATION OF HAMMER ASSEMBLIES 1403 An improved Hammer Assembly with a base material of Kralastic is now on production 1403 Printers. These hammers are readily identifiable from the previous type nylon by the color of the base material. Identity is particularly important between alpha-numeric and numeric assembl ies. 11213141516171819101-1001-101918171915141312110036 11213141516171819101-1001-101918171915141312110036 11213141516171819101-1001-101918111915141312110036 ~ 11213141516171819101-1001-101918171915141312110036 11213141516171819101-100 1-101918111915141312110036 11213141516171819101-1001-101918111915141312110036 11213141516171819101-1001-101918171915141312110036 12233242526272829202-2002-20292821262524232221 ~'".-:"~ . 81""""" "\,.' . :' FI G. 22 28 . . -,' Phantom Printing and Slur BREAK -I NSERT o The following will assist in replacing correct assemblies: I. Nylon Alpha Numeric White PiN 474805 2. Kralastic Alpha Numeric Gray P!N 474805 3. Nylon Numeric Black PiN 475469 4. Kralastic Numeric Blue PiN 475469 In addition, one order of numeric hammer ossemblies was made with a blue shade which approaches the color of the gray alpha hammer. When the color is questionable, the numeric hammers may also be defined by the break on the insert or the radius on the armature end of the hammers as shown. Although nylon and kralastic hammers are completely interchangeable replacement of kralastic with nylon is not recommended except in case of emergency. B. NYLON BUTTON HAMMER ASSEMBLY New nylon button type Hammer Assemblies 804642 (olpha-numeric) and 804672 (numeric) became effective an machines built starting January 28, 1963. They will maintain proper spacing between hammers and are expected to reduce hammer spring breakage. NYLON BUTTONS The button hammer assemblies must not be intermixed with non-button Hammer Assemblies 474805 (alpha-numeric) or 475486 (numeric), or increased hammer spring breakage may occur. Field changeover to the new assembl ies is not necessary. 1403 Machines at approximately the C 3 suffix will have the nylon button hammer bar assembly; however, a few machines were shipped at the A 3 and B 3 suffix level also. The hammer as~emblies may be identified by two nylon buttons molded on one side of each hammer. RIBBON DRIVE TROUBLE NO YES CHECK VOLTAGE TO MOTOR CHECK MOTOR FOR BINDS AND LUBRICATION. I. CHECK RIBBON DRIVE CLUTCH. SEE S.H. 37 2. CHECK REVERSE DRAG FRICTION CLUTCHES. SEE S.H. 38 I. CHECK THAT REVERSE NO BAR IS HITTING REVERSE LEVER. 2. CHECK MICRO SWITCH WITH METER OR SCOPE SEE S. H. 40 I. CHECK FOR EXCESSIVE YES DRAG ON THE LOWER REVERSE DRAG FRICTION RINGS. S.H. 38 2. CHECK SKEW ROLLER. REFER TO S.H. 39 29 S.H. 37 RIBBON STALLING Ribbon stalling can result from excessive clearance between friction clutch armature plate and rotor surface. The armature will cock on its spline and fail to mate with the rotor surface when the clutch is energized. To obtain this clearance, one or more of the following shims must be inserted between the retaining ring and the armature as shown. or debris and cleaned. Refer to Fig below ~--96 SPRING TENSION RING ASM. REFER TO 1403 PARTS CATALOG (FORM NO. 124-0026-2) REF.16 EXCESSIVE CLEARANCE -.H.-HERE MAY CAUSE "1 r ARMATURE COCKING OF shim thickness .010 .016 . 025 PiN 233154 204431 204432 S.H. 39 RIBBON SKEW FAILURES Ribbon skew failures can be caused by the adjustment of the skew roll or the roll becoming soaked with ink and swelling. The skew roll should be replaced if it becomes soaked with ink. If no roll is available, the old one could be shaved down with a knife. Ribbon skew can be caused by the ribbon becoming stretched on one side due to the printing all being done on that side. This will cause the ribbon to wind like a cone and. cause skew. By periodically reversing the ribbon under these conditions, longer ribbon life will result. A defective spider spring, Part # 474159, or dirty friction disc, Part # 473651, can cause skew trouble. Refer to the 1403 Reference Manual for ribbon skew adjustments. S.H. 40 RIBBON REVERSE FAILURE Failure of the ribbon to reverse can result if the toggle plate spring, PiN 473795, and the ribbon reverse lever spring, PiN 473796, are interchanged. The springs are easily identified, as PiN 473795 is black, while PiN 473796 is cad.m.ium plated. Refer to Fig below . PIN 473796 RIBBON REVERSE LEVER SPRING PIN 473795 ~~~~~E SPRING Clutch faces must be cleaned with crocus cloth. If old style toothed ribbon feed clutches are in the machine, they should be replaced with the new style friction drive clutches. 1401 EC CEM 326 BIM 485406. Some machines have been shipped which contain ribbon feed clutch armatures (PiN 475678) which were inadvertently polished. Machines containing such armatures may fail to transmit su ffj c i ent torque to overcome the brake drag, resu Iti ng in stalled ribbons and eventual ribbon damage. If this condition is noted, the armature PiN 475678 should be replaced. S.H. 38 REVERSE DRAG FRICTION RING Excessive drag on lower ribbon reverse drag friction rings can cause failure to correct ribbon skew or ribbon stall ing. Ribbon skew is corrected only when the upper ribbon spool is winding. Under these conditions, ribbon ten~ion can increase to a point where the skew roll cannot grip the ribbon. If this condition is evident, frictions rings should be inspected for oil, grease, 30 o FORMS STACKING TROUBLE YES STACKER ROLL SHAFT TURNING NO f-- BROKEN DRIVE BELT OR IDLER FEED ROLL SPRINGS BENT OR OUT OF ADJUSTMENT REFER TO S. H. 41 i- I- WORN OR BINDING FEED ROLL CHECK FOR WORN FRICTION DRIVE ROLL. (ON VARIABLE SPEED STYLE ONLY) "- '-- S.H. 41 STACKER TENSION SPRINGS Stacker tension springs are to be adjusted to feed rolls to a point of tangency without compressing the springs. CHECK FOR LOOSE DRIVE PULLEY ASSEMBLY PART # 474906 This adjustment is made with the stacker spring lift bar in the drive position. 31 1401 OR PRINTER STOPS YES END OF FORMS MICRO SWITCH FAULTY OR OUT OF ADJUSTMENT REFER TO S.H. 43 FOR TRACTOR DOOR ADJUSTMENT CARRIAGE BRUSH INTLK. SWITCH FAULTY OR OUT OF ADJUSTMENT 6 & 8 LINE SEL. INTlK. SW. REFER TO S.H. 42 DEFECTIVE CARRIAGE TAPE YES YES DEFECTIVE STOP KEYS I/E CHANGE CIRCUITRY CARRIAGE STOP KEY NO FORMS CHECK MICRO SWITCHES FAULTY OR OUT OF ADJUSTMENT REFER TO S.H. 43 GATE INTERLOCK SWITCH FAULTY OR OUT OF ADJUSTMENT. REFER TO 1403 REFERENCE MANUAL FOR T-CASTING LATCH ADJUSTMENT NOTE: ALL OF THE ABOVE INDICATIONS OCCURED WITH PRINT AND BRANCH LOOP. 32 S.H. 42 INTERMITTENT 1403 STOPPING Intennittent stopping of the 1403 can be caused by play in the selection knob or faulty 6-8 line micro-switch. The detents are held by four collars that slip if they are not properly tightened. Tighten the two end detent pivot shaft collars snug against the casting to prevent axial movement of the shaft. Set to 6 line drive and position the detents with their two collars to center the 6-8 line shaft rock over the switch actuati ng rod. Check in 8 line drive. 1401 EC CEM 314 provides larger collars containing two set screws. S.H. 43 FORM TRACTOR ADJUSTMENTS The following is the procedure to use when adjusting the form tractor door and the jam detection device. Forms Tractor Adjustments- IBM 1403 Current production machines incorporate a jam detection micro-switch assembly mounted on each of the four forms tractors. Adjust the tractor doors and individual jam detection device as follows: Refer to Fig. 23 2. Adjust the jam detection nyloc set screw for break of the jam detection switch with an additional door opening of •. 047"to .062". This will result in a door opening of .095" to .118" when the switch breaks. Refer to Fig. 24 NYLOC ej I ~0~~:' ~' ~I I ADDITIONAL PLATE MTG. SC RS. ~'" :.Jl .047"-.062" DOOR OPENI NG FIG. 24 3. Adjust the slide support to limit tractor door open position to obtain 3/32:: 1/32 clearance between the tractor door and straight edge held perpendicular to the tractor guide plate. The straight edge must be butted against the bel t guide step as shown. Refer to Fig. 25 SLIDE SUPPORT PLATE BELT I\,..~--"---- GU I DE STEP STOP SET SCR. ADJUST FOR A CLEARANCE OF .048" TO .056" FIG. 23 /COVER ~ /GUIDE I. To position the tractor door for a clearance of .048" to .056" to the paper gu ide . a. Loosen the pivot plate mounting screws. b. Turn the cover stop set screw in below the correct door setting. c. Insert the necessary feeler gages. d. Holding the door against the feeler gages, and tighten the pivot plate mounting screws. e. Readjust the cover stop set screw to hold the door at the correct clearance. STRAIGHTEDGE ~ ~ ~3/32":1/32 IICLEARANC FIG. 25 Refer to 1403 Reference Manual (Tractor Jam Detection Devi ce adj.) if the 1403 has the Jam Bar Bail styl e. 33 SYNC CHECKS DO NOT RESET ERROR TO CHECK THE CONDITION OF THE ELECTRONIC CIRCUITS CHECK FORMS CART GROUNDING STRAPS ON BOTH CARTS REFER TO 1401 EC CEM 541 FOR NEW STYLE GROUNDING STRAPS NO ROTATE CHAIN BY HAND (IN NORMAL DIRECTION) TO DETERMINE IF ANY TIGHT SPOTS. CLEAN CHAIN WITH TYPE CLEANER PAPER PART # 451529 AND VACUUM. REFER TO S.H. 45 AND 46 YES CHECK DRUM HEAD AREA FOR DIRT CHECK HEAD TO DISK CLEARANCE FOR MINIMUM OF .003. REFER TO S.H. 47 & 49 YES CHECK CHAIN DRIVE GEARS FOR WEAR OR MISALIGNMENT. LUBRICATE GEAR HOUSING WITH IBM # 22. REFER TO S.H. 49. YES CHE<;:K -ELECTRONIC CIRCUITS CENTER BAR ASM. STRAIGHT EDGE SoH. 44 SYNC AND PRINT CHECKS If getting print and sync checks together, try trouble shooting the sync checks fi rst. PIN 474083 LUBRICATOR CHAMOIS TO JUST TOUCH STRAIGHT EDGE OR WITH STRAIGHT EDGE REMOVED MUST NOT PROTRUDE ABOVE CENTER BAR ASM. MORE THAN 1/64" So H. 45 CHAIN OILER ADJUSTMENT Adjust lubricator chamois to just touch a straight edge laid along the back side of the center bar, or with straight edge removed, chamois must not protrude above center bar assembly more than 1/64" . UPPER PLATE PLATEN 34 SYNC CHECKS NO CHECK TO SEE THAT ALL BUFFER CLOCK TRIGGERS ARE OFF. REFER TO S.H. 50 CHECK BUFFER DRIVE LINES. ONLY TENS 13 AND UNITS 2 SHOULD BE ON. ALL OTHERS OFF. REFER TO S.H. 56 COMPARE COUNTER USED ONLY IN UNBUFFERED MACHINES AND IN THE BUFFERED MACHINES PRIOR TO SERIAL 20000 SYNC ON HOME TRIGGER SCOPE PSS COUNTER AT THE TIME OF HOME SAMPLE ONLY PSS TRIGGER I SHOULD BE ONALL OTHERS OFF. SYNC ON HOME TRIGGER SCOPE PSS COUNTER AT THE TIME OF HOME SAMPLE. ONLY PSS TRIG. I SHOULD ON. ALL OTHERS OFF. REFER TO S.H. 51 SYNC ON HOME TRIGGER, SCOPE COMPARE COUNTER AT HOME SAMPLE TIME ALL TRIGGERS SHOULD BE OFF YES FALSE SYNC CHECK ERROR REFER TO S.H. 52 & 53 SYNC ON HOME TRIGGER. SCOPE THE STATUS OF THE PSS RING. PSS RING THREE SHOULD BE ON AT HOME ERROR SAMPLE TIME. IF THE COMPARE OR PSS COUNTER IS WRONG, RESET THE MACHINE CHECK THESE COUNTERS ~ THE PSS RINGS WHEN NOT PRINTING. IF THE FAILURE IS IN THIS AREA IT IS NOT NECESSARY TO PRINT WHILE TROUBLE SHOOTING 35 SYNC CHECK SERVICE HINTS S.H. 46 BINDING CHAIN If chain is suspected of binding and cannot be felt by rotating by hand, remove the chain and cartridge and try printing a few lines. If the chain is extremely dirty and cannot be cleaned with type cleaner, it should be cleaned by the off cartridge method (Refer to 1403 Reference Manual for proced ure). S.H. 47-A. METHOD Of CHECKING DRUM PULSE Read head to disk clearance should be checked with a piece of paper, not with the feeler gages (carriage tape is good). The drum pulse should be checked for amplitude (50 to 150 millivolts, peak to peak, one side of read head to ground. Any variation in timing or amplitude is an Indication of mechanical wear. PSS pulse should not vary more than 530-580 microseconds between pulses. Check for worn timing disc key or loose drum mounting screw. Worn or broken sprocket teeth will give you sync checks. The lower chain drive motor bearing can cause variations in the P. S. S. pulse. Refer to Print Timing Control Chart. PRINTER TIMING CONTROL W HERE INTERMITTENT SYNC CHECKS, PRINT CKS., WRAP AROUND FAILURES AND HAMMER DRIVER FUSE BLOWING INDIVIDUALLY OR COLLECTIVELY OCCUR THIS IS A PROBABLE AREA FOR FAILURE PSS COUNTER SAME AS THE COMPARE COUNTER IN UNBUFFERED CHECK PRINTER SEQ CHARTS FOR PSS RING OUTPUT SSI SENSE AMPLIFIER 1-2 DIFFERENT AMPLIFIER PSS RING SS2 SCAN COUNTER ~ SS3 VARIATION IN TIMING AND AMPLITUDE IS AN INDICATION THAT MECHANICAL WEAR IS PRESENT IN THE DRUM, DRUM BEARING OR DRIVE AREA 400 MICRO SECOND S.S. HOME CIRCUITS INITIAL THE CD DRUM PULSE INTERNAL SYNC. ONE LEG TO GROUND 50 TO 150 MILLIVOLTS PEAK TO PEAK _ iii SENSE AMPLIFIER OUTPUT INTERNAL SYNC. ~~~~ER ONE LEG TO GROUND .5V TO IVOLT PEAl< TO PEAl< HOME TRIGGER PSS TRIGGER . HOME TRIGGER PSS TRIGGER 36 @ .: SYNC ON HOME _: SYNC. ON HOME @ _ ERROR CHECK FOR SYNC CK TURN ON FOR RUN TRIGGER SYNC ON HOME PRINTING SYNC ON SCA N 48 DIFFERENTIAL AMPLIFIER HOME TRIG. HOME TRIGGER 400 MICRO SECOND SINGLE SHOT .1: SYNC POINTS AS INDICATED ALL TIME 200MICRO SECOND PER DIVISION 10-1 ATTENUATOR .5 VOLTS PER DIVISION ON SCOPE FOR ALL ITEMS EXCEPT I AND 2 S.H.48 B. METHOD OF CHECKING 1403 TIMING DISK MAGNETsM The following procedure can be used when magnetizing the 1403 timing disk to determine if the timing disk is biased to give the best possible rise time to the PSS pulse at the PSS trigger. Refer to-Magnetize Timing Disk, in the IBM 1403 CE Reference Manual for the magnetizing procedure. To perform steps 5 or 7, do the following: I. Use 10 to I voltage probe. 2. Trigger scope on external sync plus. 3. Sync on the PSS pulse at pin A of 0lA6A23 {36.31.01.2} 4. Set sweep speed to 100 us per dividion. 5. Probe the PSS pulse and align the rise of the pulse on the center line. Adjust the horizontal control so the rise of the PSS pulse is on the center Iine of the scope face as shown in Figure a. The wave shape shown in Figure b. a picture of the magnetic impulses directly from the timing-disk read head. The sharpest change in wave form at the center line gives the best rise time to the PSS pulse at the PSS trigger. I. 2. 3. 4. 5. A METHOD OF CHECKING PSS PULSE VARIATION BY SCOPING PRINT READY. Sync on Print Ready going on. Scope Pin N (Print Ready Trigger going off). Refer A. L. D. 's for location. Program 2444 in location 444. Set scope to 10 microseconds per division and 2 volts per division. Start program and observe. Print ready being turned off by the PSS pulse, should not vary more than 50 microseconds. NON-BUFFER BUFFER 2V per div IOu sec. per div. 10-1 voltage probe (a) SYNC PULSE 0.5 Volts/Division 100 sec ./Division Sweep 10 to I Voltage Probe At Disk Speed of 750 RPM I. 2. 3. 4. 50 - 150 MV from each leg. 100 - 300 MV peak to peak across both legs. 530- 580 sec. between PSS pulses. Rise time.5 sec. maximum. (Measurements taken at output of D; fferential Amplifier) 5. PSS pulse #144 is 230 - 330 sec. from home pulse. (b) CORRECT BIAS 0.01 Volts/Division 100 sec ./Division Sweep 10 to I Voltage Prabe Sync same as set up in Figure a. Probe 1403 SA I pinBorD. Wave shape shown in Figure b is a picture of the magnetic impulses directly from the timing disk read head. The sharpest change in wave form at the center Iine will give the best rise time to the PSS Pu Ise at the PSS Trigger. On non-buffered machines, this is approximately 15-65 usee. after Print Ready is turned on. On Buffered machines, it is approximately 25-75 usec. after Print Ready is turned on. If excessive variation is observed, the PSS pulse should be scoped. Refer to S. H. 47. S.H.49 CHAIN MOTOR BEVEL GEARS Intermittent sync checks and/or wrap around errors can occur from worn or misaligned bevel gears in the drive motor gear housing. B/M 485965 provi des parts and instructions to replace component parts of the gear housing assembly (1401 CEM 412). IBM Lubricant #22 is now recommended for use in the Chain Drive Motor bevel gear housing. The following procedure is recommended to simplify relubrication of the bevel gear chain unit. The unit must be lubricoted ot three month intervals with IBM #22 grease. I. Remove the read head cover over the chain drive gears. 2. Remove the screw from the chain motor gear housing as indicated. ~ REMOVE I I (c) CORRECT BIAS Same set up as in Figure b Wave shape being the inverse of Figure b means only that the Read Head wires are reversed. ~ // /~1 I - ./ J \.-:::- ~ I (d) INCORRECT BIAS Same set up as in Figure b The sharpest change in wave form is not on the center line of the Scope Face. (e) INCORRECT BIAS Same set up as in Figure b Wave shape being the inverse of Figure d means only that the Read Head wires are reversed. 3. Add ff22 grease through this tapped hole' with a small diameter nozzled grease gun extension {PiN 450566}. Depress the plunger on the grease gun a sufficient number of times to force the grease out of the tapped hoi e or around the pinion gear. 4. Replace screw and wipe off excess grease from the housing. 5. Run The motor approximately five minutes so thot excess grease will be forced out around the pinion gear. Stop the motor and wipe off any excess. 6. Replace the Read Head Cover. 37 CHECK BUFFER CLOCK S.H.50 Tie pin E of the clock control trigger to ground. This will make the buffer clock triggers ruh continually. 36.34.11. BUFFER CLOCK TIMING S.H.51 CHECKING ADVANCE PULSES AND ADJUSTMENT CYCLES OF PSS COUNTER ON PRINT BUFFER MACHINES. Wire in the home pulse to allow printing to begin at home time only. Clear the print area to blanks. 2444 at location 444. I. Enter a I in print position I (2011 andCi C in print position 130(330), Execut.e a print op. and check that the 1 and D print",d O. K. This checks the advance by 2. 2. Enter a 2 in print position 2 (202) and a D in print position 131 (331). Execute a print op. and check that the 2 and D printed O. K. This checks the +11 correction of the PSS Counter at the end of Sub scan I. Enter a 3 in print position 3(203) and an E in print position 132(332). Execute a print op. and check that the 3 and E printed O. K. This checks the + 11 correction of the PSS Counter at· the end of Sub scan 2. 3. Enter a 4 in print position 4 (204). Execute a print op. and check that the 4 printed O. K. This checks the +9 correction of the PSS Counter at the end of Sub scan 3. If all 7 characters are printing correctly, the PSS Counter is operating properly. Refer to the following charts. (A,B/C/D) Without Print Buffer refer to Chart E. PSS COUNTER CHART A PSS COUNTER ADVANCED BY I (NOT PRINTING) CHARTS ARE FOR SYSTEMS ABOVE SERIAL #20000 WITH PRINT BUFFER STUVWXYZ+ %J TR-l TR-2 TR-4 ~_-....JnL-_......I TR-8 '--_----'n. . ._~r I'"-"-___~ TR-A ~~--------------~ TR-B ~~----------------~ I Home Trigger r---'-1 1 I 1. __________________________________________________________________ _ I I ~ I I : - - 270 uSEe. I I. DO NOT PRINT: SYNC ON HOME TRIGGER GOING POSITIVE. COUNTER SHOULD ADVANCE BY I EVERY THIRD PSS PULSE (PSS PULSE ASSOCIATED WITH A SUB SCAN I. PATTERN SHOULD BE AS SHOWN EACH DIVISION REPRESENTS 3 SUB-SCANS (1.65 MILLISECONDS). 38 PSS COUNTER CHART B PSS COUNTER ADVANCED BY 2 (EVEN) SCAN 48 SYNC STARTS HERE TR-l "I I 2 4 6 8 %@ S U W Y + % K M 0 Q - * B D F H & 1:1 ~~---------------------------------I I TR-2 TR-4 TR-8 L-- TR-A L~ TR-B I I I SCAN 48 ----' ADVANCE by 2 ---~)o~ ETC. (44 totol per sub-scon) I. JUMPER TO ALLOW PRINTING TO BEGIN ONLY WIlH THE PSS PULSE FOLLOWING THE HOME PULSE. SYNC. ON +U SCAN 48 GOING POSITIVE AND PRINT. TRIGGER I SHOULD TURN "OFF" WITH THE FIRST PSS PULSE AND THE PATTERN SHOULD BE AS SHOWN ABOVE. EACH DIVISION IS A CLOCK CYCLE. )11.1 MICROSECONDS) PSS COUNTER ADVANCED BY 2 (ODD) SCAN I CHART C SYNC. STARTS HERE ~: TR-l TR-2 TR-4 TR-8 I. JUMPER (REFER TO S. H. 58) TO ALLOW PRINTING TO BEGIN ONLY WITH THE PSS PULSE FOLLOWING THE HOME PULSE. SYNC. ON +U SCAN I GOING POSITIVE AND PRINT. TRIGGER I SHOULD TURN "ON" WITH THE FIRST PSS PULSE AN D THE PATTERN SHOULD BE AS SHOWN ABOVE. EACH DIVISION IS A CLOCK CYCLE. (11.1 MICSECONDS) 1 3 5 7 9 # / T V X Z , J L N P R $ ACE G I • ----1 ,i ,: I I I !l !l 11 11 r I II II 11 II TR-A TR-B +U SCAN-=-.J I - - - - - <..~ ETC. (44 total per sub-scan) 39 PSS COUNTER CHART D LAST ADDRESS OF ANY ~O I;~;~~~'~ 1 st EXTRA CYCLE 2nd EXTRA CYCLE I PRINT READY I I PRINT SCAN I PSS COUNTER CONTROLS I to I t6 TURN CLOCK CONTROL TR "ON" t6 CLOCK CONTROL TR, 1 rl ____________________________________-,t6 I 1..1_ _ _ _ _ _ __ to...-_______________....,tO TR-1 1'... 1__ - - - - SYNC STARTS HERE to I I TR-2 ROTIME 000- 030 to t3 ~~~ ADVANCE +0 by 2 AUX. ADV. by 2 +3 to t3 to t3 __~r_l~______~r-l~____________ +9 +105 +3 +4.5 Il~~~rl~~rl~---~rl~---~rl~! ---[l~------ONLY IF IN SUB-SCAN 1 or 2 _ _ _ _----'T r: n I......_~--' I n L..._~ n ~_~ n ~_~ n ~_~ 1-_ _ _ __ PSSTR-2 (EXAMPLE) L 1. 40 SYNC. ON CLOCK CONTROL TRIGGER GOING POSITIVE AND PRINT. PATTERN SHOULD BE AS SHOWN ABOVE. PSS COUNTER CHART E TR-l 2 I 2 3 3 4 4 5 7 B 9 B B 7 6 6 7 6 5 5 4 3 9 9 o 0 o !f: @ / jj: ~ @ @ / s / s S T u T u T U w V V V W X y y z y X x W Z Z + TR-2 TR-4 _nJ TR-8 _ _nJ Ul,---- UlL.---__ru TR-A l'---_ _ _ru TR-B l~____________~ru NOTE: TRIGGER B NOT DRAWN IN STEP BECAUSE OF THE DURATION OF THE PULSE. WITHOUT PRINT BUFFER SoHo 52 INTERMITTENT FALSE SYNC CHECK ERRORS I. Scope drum pulses and home trigger circuitry. Refer to "Printer Timing Control Chart" page 36 2. Check drum bias, refer to S.H. 47. See 1403 Reference Manual, for drum biasing procedure. 3. A defective 400 usec. single shot pot in the home pulse circuitry will cause sync checks. 4. Sync checks when hitting the stop key on the printer have been traced, in some cases, to noise on a wire from the stop key. This noise, couples to tre twisted pair of wires leading to the sense amplifiers, results in improper pulses to the PSS counter. A solution to this has been to switch the stop key wire with a spore wire in the cable. 5. Noise from the gate interlock switch or the ribbon reverse switch will cause intermittent sync checks. 6. The right side cover shorting to SA I & 2 pins will cause sync checks. 7. When intermittent sync checks are experienced, put the machine in a print and branch operation. Scope all the CW triggers in gates 01A6. All triggers should come on within 1.5 usec. with overshoot and remain at a down or up Ievel until they are reset. 8. The Print Scan Counter can be checked by wiring a timing pulse to the binary input of Trigger I. Each trigger will fI ip back and forth with the exception of trigger 32 which is not binary coupled. The following BM's are available to correct certain machine problems. 9. Eliminate sync checks and failure to space after print when stop key is depressed. 1401 25,000 Series CEM 480 1401 10,000 Series CEM 488 SoH. 53 SYNC CHECKS CAUSED BY NOISE Ii sync checks seem to be caused by noise, a GJ--card, Part # 371501 should be installed in the gate in question to reduce noise. The card must be installed in an empty position where the voltage buss is connected. More than one card may be installed in the same gate, if one doesn't reduce the noise sufficiently. THERMAL LIGHTS S.H. 54 Thermal Interlock light indicates either chain motor terminal or hammer unit thermal has operated because of an over tem perature condition. When this occurs, Fuse 14 or 15 in 1403 blows. Outside temperature of chain motor should be under 14
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