Multitone Electronics PLC TLA-FLA Alphanumeric VHF Radio Paging Receiver User Manual TM1205pr

Multitone Electronics PLC Alphanumeric VHF Radio Paging Receiver TM1205pr

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1. Technical Manual
2. Users Guide

Technical Manual

>TM1205 Issue 1 Page (i)TECHNICAL MANUALforRADIO PAGING RECEIVERSMODEL TLA 852andMODEL FLA 872Printed and Published in England

TLA 852/FLA 872TM1205 Issue 2Page (ii)COMPANY LIABILITYThe information in this manual has been carefully compiled and checked for technicalaccuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line withthe company policy of technical advancement, the information within this document may bechanged. The user should ensure that the correct issue of the document is used. Commentsor correspondence regarding this manual should be addressed to:Multitone Electronics plcMultitone HouseBeggarwood LaneKempshott HillBasingstokeHampshire RG23 7LLEnglandISSUE DATE2 November 2002© 2002 Multitone Electronics plc

TM1205 Issue 2 Page (iii)CONTENTSPage (i) Title PagePage (ii) Company LiabilityPage (iii) ContentsPage (iv) Effective Page ListPage (v) Safety SummaryWarningPage (vi) CautionSection 1 Introduction and SpecificationSection 2 Operating InstructionsSection 3 Technical DescriptionSection 4 Installation & CommissioningSection 5 ServicingSection 6 Spare Parts ListSection 7 Diagrams

TLA 852/FLA 872TM1205 Issue 2Page (iv)EFFECTIVE PAGE LISTPage No. Issue Page No. Issue Page No. Issue(i) 12-9 15-3 1(ii) 12-10 15-4 1(iii) 12-11 15-5 1(iv) 12-12 15-6 1(v) 12-13 15-7 1(vi) 12-14 15-8 11-1 12-15 15-9 11-2 12-16 15-10 11-3 13-1 15-11 11-4 13-2 15-12 11-5 13-3 15-13 11-6 13-4 15-14 12-1 13-5 15-15 12-2 13-6 15-16 12-3 13-7 15-17 12-4 13-8 15-18 12-5 13-9 15-19 12-6 13-10 15-20 12-7 14-1 12-8 14-2 15-1 15-2 1 5-21 15-22 15-23 15-24 1Page No. Issue5-25 15-26 16-1 16-2 16-3 16-4 16-5 16-6 16-7 16-8 17-1 17-2 17-3/4 17-5/6 17-7/8 17-9/10 17-11/12 17-13/14 17-15/16 17-17/18 17-19/20 17-21/22 1

TM1205 Issue 1 Page (v)THE RECEIVER SHOULD NOT BE CARRIED INTO AREAS WHERE EXPLOSIVEGASES, OR DUST MAY BE PRESENT.FCC & IC Statement Of ComplianceThis device complies with FCC Part 15 & Industry Canada RSS210 regulations. Operation issubject to the following two conditions:- (1) this device may not cause harmful interference and(2) this device must accept any interference received, including interference that may causeundesired operation.Unauthorised modification to this equipment, will void the user’s authority to operate the deviceunder the terms of the above regulations.SAFETY SUMMARYThe following information applies to both operating and servicing personnel. General Warningsand Cautions will be found throughout the manual, where they apply, which refer to the applicablepart of this summary.WARNING statements identify conditions or practices that could result in personal injury or lossof life.CAUTION statements identify conditions or practices that could result in equipment damage. WARNINGCAUTIONSTATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. CARE MUST BEUSED TO ENSURE DAMAGE TO THESE DEVICES IS NOT CAUSED BY HIGH LEVELS OFSTATIC ELECTRICITY. SPARE BOARDS OR COMPONENTS SHOULD BE STORED INANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT.PROTECT THE RECEIVER FROM LIQUIDS, STRONG MAGNETIC FIELDS AND EXTREMETEMPERATURES. DO NOT LEAVE THE RECEIVER EXPOSED TO STRONG SUNLIGHT.AREAS SUCH AS WINDOW LEDGES ARE TO BE AVOIDED.

TLA 852/FLA 872TM1205 Issue 2Page (vi)INTENTIONALLY BLANK

TLA 852/FLA 872TM1205 Issue 2 Page 1 - 1SECTION 1INTRODUCTION & SPECIFICATIONCONTENTS: Page1.1 INTRODUCTION 1 - 21.2 FEATURES 1 - 31.3 SPECIFICATIONS 1 - 31.3.1 Receiver Performance 1 - 31.3.2 Power Supply 1 - 41.3.3 Code Format 1 - 41.3.4 Memory 1 - 51.3.5 Displays, Controls and Alerts 1 - 51.3.6 Operational Environment 1 - 61.3.7 Physical Characteristics 1 - 6TABLES:1.1 Sensitivity Figures 1 - 4

TLA 852/FLA 872TM1205 Issue 2Page 1 - 21.1 INTRODUCTIONThe MultitoneTLA 852 and FLA 872 Radio Paging Receivers are VHF receiverswhich receive messages sent in CCIR Radiopaging Code No.1 (RPC1).The front panel of the unit has a Liquid Crystal Display (LCD) to display messagesand other information. The three buttons on the front panel are used to control thefunctions of the unit.The LCD of the TLA 852 can show a maximum of two lines of 20 alphanumericcharacters; the FLA 872 has the option of showing a maximum of four lines of 20characters, or two lines of double height characters. The displays can also show amaximum of seven symbols in a line.If the TLA 852 receives a message that is longer than 40 characters, it displays thefirst 40 and stores the excess. The front panel buttons are used to transfer thestored part of the message to the screen as required. Similarly, if the FLA 872receives a message which has more than 80 characters (40 characters in doubleheight mode) the excess characters are stored.Message alert is provided by an audible beep tone or by the unit vibrating. Thebuttons are used to select the preferred alert.Power for the unit is supplied by a single AAA battery. A door on the rear of the unitgives access to the battery. A back-up supply for the unit is available when the battery is changed. The back-upsupply is provided by a large-value capacitor mounted on the decoder board in theunit. The capacitor, when fully charged, can maintain data in the unit for more than5 minutes.The unit case is a two-piece plastic moulding secured by two cross-head screws. Alanyard is supplied with the unit which can be fastened to the case and the attachedclip used to secure the unit to a suitable object.

TLA 852/FLA 872TM1205 Issue 2 Page 1 - 31.2 FEATURESThe unit has these features:!Displays two lines of 20 characters - TLA 852 (four lines - FLA 872)!Message Store!Information Service Messages (Optional)!Display Backlight!Date/Time Display!Selectable Alert - Audible Beep or Vibration!Alarm!Out of Range Indication (Optional)!Timed-off Mode!Low Battery Warning!Battery Economy1.3 SPECIFICATIONS1.3.1 Receiver PerformanceFrequency Range: 138MHz through 174.1MHzFrequency Bands: Band 1: 138.000MHz - 143.499MHzBand 2: 143.500MHz - 148.999MHzBand 3: 149.000MHz - 154.999MHzBand 4: 155.000MHz - 160.999MHzBand 5: 161.000MHz - 167.499MHzBand 6: 167.500MHz - 174.100MHzChannel Spacing: 10/12.5/25kHzIntermediate Frequencies: 21.4MHz and 455kHzCrystal Frequencies:Local Oscillator: Carrier Frequency minus 21.4MHz2nd Oscillator: 20.945MHz

TLA 852/FLA 872TM1205 Issue 2Page 1 - 4Sensitivity:The sensitivity figures quoted in Table 1 assume an ambient temperature in therange 18EC through 25EC. The battery voltage should be above the low batterytrigger point of approximately 1.15 volts. At temperatures between the ambient andmaximum / minimum, performance is at an intermediate value. At temperatureextremes degradation of sensitivity shall not exceed 6dB.Table 1.1: Sensitivity FiguresMEASUREMENTMODEBEST TEM CELLPOSITION, (dBm),TYPICAL TYPICALBAUDRATEOn Pole 14dBµVm -104dBm 120012dBµVm -106dBm 512-1-120dBµVm -101dBm 2400-1NOTE: The following performance figures are typical for an ambient temperaturerange of 15EC through 35EC.Adjacent Channel Selectivity: >78dBImage Response: >70dBSpurious Response: >70dBIntermodulation Response: >62dBCo-channel Rejection: >-6dB1.3.2 Power SupplyBattery Type: Alkaline AAA (1.5 Volts Nominal)Typical Battery Life: 800hrs1.3.3 Code FormatThe Code Type is CCIR Radio Paging Code No.1 POCSAG

TLA 852/FLA 872TM1205 Issue 2 Page 1 - 51.3.4 MemoryCapacity: The units can accept messages to amaximum of 1024 characters. Theycan store a maximum of 32 read orunread messages and six archivemessages.Recall: Stored messages can be retrieved inany order.1.3.5 Displays, Controls and AlertsLiquid Crystal Display: TLA 852: Two lines of text.FLA 872: Four lines of text.Control Buttons: Three push-buttons (Select, Left andRight) on the front panel of the unit,control all the functions of the pager.Display Illumination: The display illumination is selectedON or OFF from the Display OptionsScreen, by using the front panelcontrol buttons.Audible Alert: Various tone patterns can be selectedor muted from the Alert OptionsScreen, by using the front panelcontrol buttons.Vibration: The vibration alert can be set to ONor OFF by using the front panelcontrols.

TLA 852/FLA 872TM1205 Issue 2Page 1 - 61.3.6 Operational EnvironmentThe unit will operate to specification within these limits:Operating Temperature: -10EC through +55ECStorage Temperature: -20EC through +60ECNOTE: There may be some degradation of display performance below 0EC.1.3.7 Physical CharacteristicsDimensions: Width: 75mmHeight: 48mmDepth: 17mmWeight: 60g (with battery)

TLA 852/FLA 872TM1205 Issue 2 Page 2 - 1SECTION 2OPERATING INSTRUCTIONSCONTENTS: Page2.1 CONTROLS AND INDICATORS 2 - 3 2.1.1 Display 2 - 4 2.1.2 Controls 2 - 4 2.2 OPERATING INSTRUCTIONS 2 - 4 2.2.1 General 2 - 4 2.2.2 Switching the Unit ON 2 - 4 2.2.3 Setting the Options 2 - 5 2.2.4 Archive 2 - 6 2.2.5 Alarm 2 - 6 2.2.6 Alert 2 - 7 2.2.7 Display Backlight (TLA 852) 2 - 8 2.2.8 Display Options (FLA 872) 2 - 8 2.2.9 Changing the Height of the Characters 2 - 8 2.2.10 Display Backlight (FLA 872) 2 - 9 2.2.11 Setting the Time and Date and Timed-off Time 2 - 9 2.2.12 Deleting Messages 2 - 112.2.13 Switching the Unit OFF 2 - 122.3 RECEIVING AND STORING MESSAGES 2 - 132.3.1 Receiving a Message 2 - 132.3.2 Reviewing Stored Messages 2 - 132.3.3 Archiving Messages 2 - 142.3.4 Reviewing Information Service Messages 2 - 142.3.5 No Service 2 - 142.4 LOW BATTERY 2 - 152.4.1 Low Battery Warning 2 - 152.4.2 Replacing the Battery 2 - 152.5 LANYARD ASSEMBLY 2 - 16

TLA 852/FLA 872TM1205 Issue 2Page 2 - 2FIGURES: Page2.1 Controls and Display 2 - 3 2.2 Standby Screen 2 - 4 2.3 Option Screen Symbols 2 - 5 2.4 Opening the Battery Door 2 - 152.5 Lanyard Assembly 2 - 16

DISPLAYCONTROL BUTTONSTAG11268>DISPLAYCONTROL BUTTONSSTYLE A STYLE BTLA 852/FLA 872TM1205 Issue 2 Page 2 - 3DO NOT TAKE THE PAGER INTO AREAS WHERE EXPLOSIVE GASES, ORDUST MAY BE PRESENT.Figure 2.1: Controls and Display WARNING CAUTIONPROTECT THE PAGER FROM LIQUIDS, STRONG MAGNETIC FIELDS ANDEXTREME TEMPERATURES. DO NOT LEAVE THE PAGER EXPOSED TOSTRONG SUNLIGHT.2.1 CONTROLS AND INDICATORSRefer to Figure 2.1 for the identification and location of the controls and displayassociated with the TLA 852 and FLA 872. Note: In Germany, Style A (aerofoil) case is only for T Mobile use. In the United Kingdom, Style B (oval) case is only for use by Vodafone Paging.

5:27 pm 25 .12 .98TLA 852/FLA 872TM1205 Issue 2Page 2 - 4Figure 2.2: Standby Screen2.1.1 DisplayThe Liquid Crystal Display (LCD) in the TLA 852 shows two lines of characters. TheFLA 872 shows four lines of characters (or two lines of double height characters) . Eachline can have a maximum of 20 characters. Both units can also show a maximum ofseven symbols in a line. Lamps (Electro-luminescent (EL) option also available - FLASeries only) are incorporated in the unit, to illuminate the display when required.2.1.2 ControlsThe three push-buttons have these functions: O> Selects the unit functionsMoves the cursor to the leftMoves the cursor to the right2.2 OPERATING INSTRUCTIONS2.2.1 GeneralThe operation of most functions of the TLA 852 and the FLA 872 is identical. Wheredifferences occur, both operations are described.2.2.2 Switching the Unit ONWhen the battery is installed in the unit, the display shows the time and date on thebottom line and the status symbols on the top line. The display stays on until thebattery is removed or the ‘OFF’ mode is selected.If the unit is in the ‘OFF’ mode, push and hold the O> button until the Audio andVibrate Alerts operate. The display then shows a message for a short time beforethe time and date show. This is the ‘standby’ screen.

ARCHIVE ALERT BACKLIGHT SET TIME DELETEMESSAGES OFFALARMTAG11216-1ZZZARCHIVE ALERT DISPLAY SET TIME DELETEMESSAGES OFFALARMTAG11264-1ZZZTLA 852/FLA 872TM1205 Issue 2 Page 2 - 5TLA 852 Option ScreenFLA 872 Option ScreenFigure 2.3: Option Screen Symbols2.2.3 Setting the OptionsMake sure that the unit is ON and that the display shows the standby screen.Push and release the O> button. The display will show seven symbols. These are:Push the Í or theÌ button to choose the required symbol (the symbol flashes as itis chosen) then push the O> button to select the function.Paragraphs 2.2.4 through 2.2.12 give the function and operation of each symbol.

TLA 852/FLA 872TM1205 Issue 2Page 2 - 62.2.4 Archivea) GeneralThe operator can use this option to archive received messages and also to viewmessages in the archive store.b) Archiving MessagesSelect the required message and view the complete message by pressing theO> button. After the last screen of the message is displayed, push the Í ortheÌ button to choose the archive symbol.When the archive symbol flashes, push the O> button. The display shows thearchive symbol plus a flashing ?. Push the O> button again to transfer themessage to the archive memory.If the archive is full, the ‘memory full’ symbol will flash. A message mustbe deleted from the archive memory before the new message can be saved.c) Viewing Archived MessagesTo view the messages in the archive memory select the archive symbol on theoptions screen and push the O> button. Push theÌ button to select the mostrecent message. Push the Í or theÌ button to scroll through the messages.If the message is more than one screen long push the O> button to display thenext screen.NOTE: If there are no information services available in the unit, push theÌbutton to select the archive directly from the standby screen.To return to the standby screen, push and hold the O> button for one secondor wait for the unit to time-out and show the standby screen.2.2.5 AlarmThe alarm can be set to operate once at any time in a twenty four hour period. Toset the alarm, first select the alarm function on the option screen as shown inparagraph 2.2.3.Use the ¬ or - buttons to choose the alarm ON or alarm OFF symbol.When the alarm is set to OFF, the symbol shows and the alarm time is notshown.

TLA 852/FLA 872TM1205 Issue 2 Page 2 - 7When the alarm is set to ON and the alarm time is reached, the standby screen willshow a flashing alarm symbol and the alert will operate for eight seconds. To stopthe alert within the eight second period, push any button.To set the alarm time, set the alarm to ON. The display shows the alarm symbol andalso shows the time the alarm is set to sound. To change the time:a) Push the O> button and the hour numbers flash. Use the ¬ or - buttons toset the required hour. b) Push the O> button again and the tens of minutes number flashes. Set therequired figure with the ¬ or - buttons, then push the O> button to make theminutes number flash. Set the required figure with the ¬ or - buttons. c) To return to the standby screen, push and hold the O> button for one secondor wait for the unit to time-out. The screen now shows the alarm symbol toindicate that the alarm is set. 2.2.6 AlertThe alert can be set to one of nine options; seven audible, vibrate or ‘no alert’. To set the alert, first select the alert function on the option screen as shown inparagraph 2.2.3a) When the alert screen shows, use the ¬ or - buttons to select an alert (aseach alert is selected, the associated tone sounds or the vibrate operates. Tostop the alert, push any button). b) When the required alert is selected, push the O> button for one second or waitfor the unit to timeout. c) The display returns to the standby screen and shows the alert symbol.If the vibrate alert is selected, the display shows When the audible alert is selected, the display showsWhen ‘no alert’ is selected, the display shows The alert can be quickly set ON or OFF from the standby screen by pushing andholding the O> button for three seconds.

TLA 852/FLA 872TM1205 Issue 2Page 2 - 82.2.7 Display Backlight (TLA 852) The unit display has a backlight which allows the display to be read in low-lightconditions.To operate the backlight, first select the backlight function on the option screen asshown in paragraph 2.2.3When the backlight screen shows, use the ¬ or - buttons to select the backlightON or OFF.To return to the standby screen, push and hold the O> button for one second or waitfor the unit to time-out.2.2.8 Display Options (FLA 872)Choose this option to show the display options screen. This shows two options :a) To change the height of the message characters ABC (refer to paragraph 2.2.9)b) To operate the backlight (refer to paragraph2.2.10)2.2.9 Changing the Height of the CharactersWhen the display option screen is selected, the screen shows the two symbols withthe ABC symbol flashing. There are two heights of character available; single height, which allows four linesof a message to show on the screen, and double height, which shows two lines ofa message in large characters.To change the character height, push the ¬ or - buttons until the required heightshows on the screen. To return to the standby screen, push and hold the O> button for one second or waitfor the unit to time-out.

5:27pm1225.12.98ZZTLA 852/FLA 872TM1205 Issue 2 Page 2 - 92.2.10 Display Backlight (FLA 872)Select the display option screen, then push the O> button to choose the backlightfunction.Use the ¬ or - buttons to select the backlight ON or OFF .To return to the standby screen, push and hold the O> button for one second or waitfor the unit to time-out.2.2.11 Setting the Time and Date and Timed-off Time To set the time and date or the timed-off time, first select the set time function on theoption screen, as shown in paragraph 2.2.3 The set time screen then shows twooptions:a) Setting Time and Date (Refer to paragraph A).b) Setting Timed-off Time (Refer to paragraph B).A) Setting Time and Datea) Use the ¬ or - buttons to choose the Setting Time and Date symbol thenpush the O> button.b) The screen shows the time and date with the hour numbers flashing. If theclock is set to the 12 hour mode, the ‘am/pm’ characters also flash.c) Use the ¬ or - buttons to set the required hour.

ZZTLA 852/FLA 872TM1205 Issue 2Page 2 - 10d) Push the O> button again and the tens of minutes number flashes. Set therequired figure with the ¬ or - buttons.e) Push the O> button to make the minutes number flash. Set the required figurewith the ¬ or - buttons. f) Push the O> button again and the date ‘day’ numbers flash. Use the ¬ or -buttons to set the required figures. g) Push the O> button again and the ‘months’ numbers flash. Set the requiredfigure with the ¬ or - buttons.h) Push the O> button again to make the ‘year’ numbers flash. Set the requiredfigure with the ¬ or - buttons.i) Push the O> button to select the 12 or 24 hour mode. Use the ¬ or - buttonsto set the required mode.j) When the display shows the required time and date, push the O> button forone second to return to the standby screen, or wait for the unit to time-out.B) Setting Timed-off TimeThis option sets the pager OFF and ON at preset times (e.g. overnight). To selectthis option :k) Select the Set Time screen as shown in paragraph 2.2.11.l) Use the ¬ or - buttons to choose the symbol then push the O> button.The display shows the Timed-off edit screen.m) To set the Timed-off option to OFF, push the ¬ or - buttons until the startand stop times do not show.n) To set the Timed-off option to ON, push the ¬ or - buttons until the start andstop times show on the display.o) To change the START and STOP times:i) Set the Timed-off option to ON, then push the O> button. The firstnumbers (Start Time hours) flash. If the clock is set to the 12 hour mode,the ‘am/pm’ characters also flash.

Z11:15pm 6:45amZTLA 852/FLA 872TM1205 Issue 2 Page 2 - 11ii) Push the ¬ or - buttons to select the required hour.iii) Push the O> button to select the next number (tens of minutes) then pushthe ¬ or - buttons to select the required number.iv) Push the O> button again to select the next number (minutes) then pushthe ¬ or - buttons to select the required number.v) Push the O> button again to select the next number (Stop Time hours).vi) Repeat operation ii) through iv) to set the required Stop Time hours andminutes.vii) To return to the standby screen, push and hold the O> button for onesecond or wait for the unit to time-out.2.2.12 Deleting Messagesa) Deleting Stored or Archived MessagesTo delete any message in the store or archive memories of the pager. Select the message with the ¬ or - buttons. Use the O> button to read thecomplete message. When the last screen is displayed, push the O> button then use the ¬ or -buttons to select the delete symbol.Push the O> button. The display shows the delete symbol plus a flashing ? Push the O> button to delete the message.

ZZZZZZTLA 852/FLA 872TM1205 Issue 2Page 2 - 12b) Deleting All Stored MessagesAll the messages in the store memory (but not those in the archive memory) canbe deleted in one operation.Push the O> button to show the seven option symbols.Use the ¬ or - buttons to choose the symbol.Push the O> button to select the function.The display shows the symbol plus a flashing ? symbol.Push the O> button to delete all the messages.2.2.13 Switching the Unit OFFThe pager can be switched OFF (sleep mode) but the pager cannot receivemessages while it is set to this state.To switch the pager OFF, select the OFF function on the option screen as shown inparagraph 2.3.3The display shows the symbol plus a flashing ? symbol.Push the O> button to set the pager to OFF.The screen goes blank.

TLA 852/FLA 872TM1205 Issue 2 Page 2 - 132.3 RECEIVING AND STORING MESSAGES2.3.1 Receiving a MessageWhen the pager receives a new message the first part of the message shows on thedisplay and the alert operates for eight seconds. Push any button to acknowledge receipt of the message and to stop the alert. If the call is not acknowledged the pager will give a short alert every five minutes fora maximum period of one hour.To display the message, push the - button. If the message is longer than thescreen can show, push the O> button to show the next part of the message.To return to the standby screen, push and hold the O> button for one second or waitfor the unit to time-out. If the message has not been read, the standby screen willshow the ‘message’ symbol.2.3.2 Reviewing Stored MessagesTo display the received messages, starting with the newest message, push the- button. To scroll through the messages, use the ¬ or - buttons. If themessage is longer than the screen can show, push the O> button to show the nextpart of the message.When the last part of the message is shown, push the O> button. The display showsthree symbols:To read the message again, use the ¬ or - buttons to select the first symbol thenpush the O> button.To delete the message, use the ¬ or - buttons to select the second symbol thenpush the O> button. The display shows the delete symbol plus a flashing ? symbol.Push the O> button again to delete the message.To put the message in the Archive Store, use the ¬ or - buttons to select the thirdsymbol then push the O> button. The display shows the archive symbol plus aflashing ?. Push the O> button again to transfer the message to the Archive Store.To return to the standby screen at any time, push and hold the O> button for onesecond or wait for the unit to time-out.

TLA 852/FLA 872TM1205 Issue 2Page 2 - 14The unit memory can hold a maximum of 20 messages. When this number isreached the standby screen shows the memory full symbol. If a new message is received when the memory is full, the oldest message isdeleted. 2.3.3 Archiving MessagesMessages can be protected by transferring them to the Archive Store. Refer toparagraph 2.3.4 or paragraph 2.4.2. for the procedure.2.3.4 Reviewing Information Service Messages (Optional Feature)When this feature is available, the standby screen shows the symbol when thepager receives an Information Service message.To select the Information Service menu, push the ¬ button when the screen showsthe standby display.The information menu screen shows a maximum of eight number symbols, eachenclosed within a circle. Numbers which have unread Information Service messageshave a thicker circle.Use the ¬ or - buttons to choose the required service number then push theO> button to show the message.To review other messages on the same service, push the ¬ or - buttons until therequired message shows.To return to the Information Services menu push the O> button repeatedly until themenu shows.To put an information service message into the Archive Store, use the proceduregiven in paragraph 2.3.4.2.3.5 No Service (Optional Feature)When this feature is available, the standby screen shows the No Service symbol ifthe pager cannot receive signals from the paging network.

ABPUSH THE LONG EDGE OF THEBATTERY DOOR UPWARDS TO OPEN ITPUSH THE DOOR LOCK TORELEASE THE BATTERY DOORSLIDE THE BATTERY DOORFORWARDTAG11126-1TLA 852/FLA 872TM1205 Issue 2 Page 2 - 15Figure 2.4: Opening the Battery Door2.4 LOW BATTERY2.4.1 Low Battery WarningWhen the battery needs replacing, the pager sounds an alert and the low batterysymbol shows on the standby screen. 2.4.2 Replacing the Batterya) Refer to Figure 2.4. Use a thumbnail to press down on the battery door lock onthe back of the unit. Hold the door lock down and push the battery door in thedirection shown. Rotate the door as shown in Figure 2.4 to gain access to thebattery.b) Remove the old battery.c) Refer to the diagram in the battery compartment and install the new battery.

STAGE 1SQUEEZE THE LOOP TOGETHERAND PUSH IT INTO THE SLOTSTAGE 2PULL THE LOOP THROUGH THE SLOTAS FAR AS POSSIBLESTAGE 3FEED THE CLIP THROUGH THE LOOP AND PULL TIGHTTAG11261-1TLA 852/FLA 872TM1205 Issue 2Page 2 - 16Figure 2.5: Lanyard Assembly2.5 LANYARD ASSEMBLYFigure 2.5 shows the method of assembling the lanyard to the unit.

TLA 852/FLA 872TM1205 Issue 2 Page 3 - 1SECTION 3TECHNICAL DESCRIPTIONCONTENTS: Page3.1 CIRCUIT SUMMARY 3 - 2 3.2 DUAL CONVERSION RECEIVER 3 - 4 3.3 DECODER 3 - 7 3.3.1 General 3 - 7 3.3.2 POCSAG Decoder 3 - 7 3.3.3 Microprocessor 3 - 8 3.3.4 EEPROM 3 - 8 3.3.5 SRAM 3 - 8 3.3.6 LCD Module 3 - 8 3.3.7 Display Illumination 3 - 9 3.3.8 Alerts 3 - 9 3.4 POWER SUPPLIES 3 - 9 FIGURES:3.1 TLA 852/FLA 872 Block Diagram 3 - 2 3.2 Receiver Block Diagram 3 - 4 3.3 Decoder Block Diagram 3 - 7

RADIO BOARD DECODER BOARDAUDIBLEGNDBATTERYCONVERSIONRECEIVERDUALDECODERPOCSAGCONVERTERSUPPLYVOLTAGEBACK-UPDISPLAYILLUMI-LIQUIDEEPROMCRYSTALDISPLAYMODULESRAMMVIBRATEMOTORMICRO-PROCESSORB+VDDPL401 SK1DATATAG11262-1DATAADDRCONTROLB+VDDVDDB+PROG ALERTGNDRXENCHGLOBATNATIONTLA 852/FLA 872TM1205 Issue 2Page 3 - 2Figure 3.1: TLA 852/FLA 872 Block Diagram 3.1 CIRCUIT SUMMARYThe TLA 852 and FLA 872 radio paging receivers each consist of two Printed CircuitBoard (PCB) assemblies contained in a plastic case.The case is constructed in two main parts, the case front and the case back. A coveron the back of the unit provides access to the battery compartment. The two boards in the case are:a) The Radio Board which has the Dual Conversion Receiver, the POCSAGDecoder, the 1 volt regulator and the audio alert output circuit and transducer.b) The Decoder Board which has the microprocessor, the EPROM, the SRAM, theLiquid Crystal Display Module, the LCD illumination, the vibrate motor and theprimary and backup power supplies.The block diagram of the functional areas of the units is shown in Figure 3.1. Referto Section 7 for the circuit diagrams and board layout information.

TLA 852/FLA 872TM1205 Issue 2 Page 3 - 3The RF signal enters the aerial and is fed to the dual conversion superheterodynereceiver. The signal is demodulated from RF to audio frequency digital form and isthen fed to the decoder. This results in the received data activating the memory,display and the selected audible alert or vibrate alert.To prolong the life of the battery, the receiver operates in battery economy mode.When the unit is in standby mode, the receiver is powered up at regular intervals(equivalent to once per batch) to allow the POCSAG decoder to search forpre-amble. While the unit is receiving preamble on its allocated channel, thereceiver remains powered up. This allows the POCSAG decoder to search for aSYNC word. When the SYNC word is found, ‘batch lock’ is achieved. In batch lockthe receiver is only powered up during the allocated frame to allow the POCSAGdecoder to search for its address. If the address is found, the receiver stays ON forthe duration of the message.

TAG11263-1RF AMPLIFIERTR403MIXERAE401AE4022nd OSC.MIXER455kHzTR401, TR40221.4 MHzCERFL402IC401MIXER, IF AMP & DET.TR4101st OSC.FL401IF AMPXL402XL401455kHzCERFL403CV404(OPTIONAL)TR404 TP403IMAGEFILTERGND GNDCV407 CV406CV405TP405RSSIDETDELAYFL404DECODERTP401SINADFSKCOMP.FILTER QUICK CHARGEAMPPHASE1VREGTR406 1VSUPPLY1VTP402INT.REF. RXEN LOWB AGC CONTROLTLA 852/FLA 872TM1205 Issue 2Page 3 - 4Figure 3.2: Receiver Block Diagram3.2 DUAL CONVERSION RECEIVERThe incoming RF signal is received by the aerial AE401/AE402 which is tuned byCV404. Capacitors C401, C405 and inductor L416 provide matching to RF amplifierTR401, TR402. The amplifier, typically, yields a voltage gain of 20 dB. R401 andR402 provide DC bias.

TLA 852/FLA 872TM1205 Issue 2 Page 3 - 5The output from the RF amplifier passes through an image filter which provides thesefunctions:a) Attenuation of signals outside the required band.b) Attenuation of the first image frequency.c) Matches the output impedance of the RF amplifier to the input impedance of themixer stage.L401 and CV407 form a parallel tuned circuit with the resonant frequency set to thecarrier frequency.L407 forms a series resonant circuit which provides a notch filter at the imagefrequency.The local oscillator comprises transistor TR410, crystal XL402 and associatedcomponents. Frequency adjustment is by CV405. The local oscillator frequency iscalculated as follows:fx = carrier frequency minus 21.4MHzwhere fx is the crystal frequency in MHz.C452, C453, C494 and R439 provide decoupling of the supply rail to give goodadjacent channel performance. The local oscillator signal is coupled to the mixercircuit by C465.The mixer circuit, TR403 and associated components, receives the RF output of theimage filter. The RF signal is mixed with the local oscillator output to produce a21.4MHz product. This is matched to the filter, FL401, by L406, C495 and R412.FL401 has a bandwidth of ±7.5kHz at the 3dB points.The output from FL401 is matched by C485, R444 and L410 to IC401 pin 24. IC401is a combined IF mixer / local oscillator / detector.The second oscillator runs at 20.945MHz and, with the exception of XL401 and itstuning capacitors C407, C408, is built into the IC. As the second oscillator is nottrimmed, small frequency errors are absorbed when tuning the first local oscillator.The input at pin 24 is applied to the internal second mixer, and is mixed with thesecond oscillator output to produce a 455kHz 2nd IF signal at pin 3. The IF signalthen passes through two ceramic filters FL403 and FL402 which remove unwantedmixer products and provide further selectivity.The output from FL403 is split: one output connects through C444 to pin 6 of IC401and the IF amplifier; the other optionally connects to the Received Signal StrengthIndicator (RSSI) circuit in IC401 through C454, R426 and pin 5.

TLA 852/FLA 872TM1205 Issue 2Page 3 - 6Due to the characteristics of filters FL401, FL402 and FL403, the signal at the inputto the IF amplifier has amplitude modulation (AM). The AM must be removed beforethe signal reaches the detector stage. This is performed by the IF amplifier in IC401which has very high gain and is designed to limit the amplitude of the signal toremove the AM component and give a ‘square’ output. C479 and C480 providede-coupling for the IF amplifier.The output from the IF amplifier passes to the detector in IC401. This circuit is aQuadrature Demodulator which has two inputs. One input connects directly to theIF amplifier, the other receives the signal from the IF amplifier through a phase delaycircuit connected to pins 9 and 10 of the IC. The phase delay depends on thefrequency of the IF signal and is 90 degrees at the centre frequency of the unit’sallocated channel. The phase shift is provided by ceramic discriminator FL404,capacitor C426 and resistor R416. C425 is a de-coupling capacitor.The RSSI circuit in IC401 provides an optional Automatic Gain Control (AGC) signalfor the receiver. The circuit detects the received signal strength and gives a DCcurrent out. R426 sets the level at which the circuit starts to operate. The value of68 kilohms sets it to approximately 16 dB above the noise floor. The DC output frompin 22 of the IC connects to the AGC control circuit. When there is no RSSI output,transistor TR404 is biased off and keeps the RF amplifier at full gain. At strongsignal levels the output from the RSSI causes TR404 to gradually start conducting,thus reducing the gain of the RF amplifier. C451 determines the rise and fall timesof the AGC.The output from the detector stage, pin 11, gives an audio output to TP401. This testpoint is used in the final stages of production to align the receiver circuits. TP 401is also used to program the decoder section of the unit. Pin 11 of IC401 alsoconnects through R425, R429 and R428 to pin 12. These resistors together withcapacitors C448, C483, C484 and the internal filter amplifier of IC401 form the datafilter; a unity-gain, low-pass filter which reduces high frequency noise.The output of the data filter connects internally to the FSK Comparator. The dataoutput of the comparator, from pin 18, connects to the POCSAG Decoder, IC402,pin 4. A logic signal from IC402, pin 2 to IC401, pin 16 controls the Fast/Slow chargeof the FSK Comparator. At switch-on the logic level is high and the circuit is set toFast Charge to allow the voltage on capacitor C492 to be set to the voltage level onC486. The logic level at pin 16 is then set low which sets the comparator to normaloperation.

DISPLAYMVIBRATEMOTORLIQUIDEEPROMCRYSTALDISPLAYMODULESRAMAUDIBLEALERTMICRO-PROCESSORSK1TAG11122-1DATA BUSADDRESSCONTROL LINESDECODERPOCSAGPL401PGMDATAXL403SW2SW3SW1!>BUTTON BUTTON BUTTONFROMRECEIVERBUSRESETIC5VDDIC1IC3IC402RESETDRIVERDRIVERTR415TR3; TR4TP401DRIVERTR2 ORTR416SK1 PL401IC4RESETILLUMI-NATIONTLA 852/FLA 872TM1205 Issue 2 Page 3 - 7Figure 3.3: Decoder Block Diagram3.3 DECODER3.3.1 GeneralThe Decoder comprises the POCSAG decoder, Microprocessor, EEPROM, SRAMmessage memory and switches, plus support components and a separate LCDmodule. The signal from the receiver is processed by IC402, the POCSAG decoder,and the decoded data passed to the microprocessor. The microprocessor stores theinformation in the SRAM, IC4, before activating the selected alert and sending themessage data to the LCD module for display. The EEPROM holds informationapplicable to the unit.3.3.2 POCSAG DecoderThe POCSAG decoder, IC402, is located on the Radio Board of the unit andconnects to the microprocessor, IC3, through PL40I / SK1. Pin 4 of IC402 receivesthe data signal from IC401. IC402 decodes the information and sends it, four bytesat a time, to the microprocessor, IC3. IC402 uses the SCK clock pulses from IC3,pin 59, to transfer the data on the SDO line, IC402, pin 13. When no signals are received by the unit, the system goes into a standby mode toreduce power consumption. In this mode, a pulse from IC402 pin 1 (BS1), sets thereceiver circuits ON for a brief period every 0.5s - 1s, depending upon Baud rate, tocheck for a preamble signal. If such a signal is received, followed by a valid addressand message, a signal is sent from IC402, pin 15 (ATTN) to alert the microprocessor.

TLA 852/FLA 872TM1205 Issue 2Page 3 - 8Pin 9 (CLK0) provides clock pulses to operate the microprocessor while it is instandby mode. Pin 11 (AREA) goes high when a valid signal is received.Pin 14 (SDI) receives program information from the microprocessor. Pin 2 (BS2) controls the ‘fast charge’ operation of the FSK comparator in IC401.3.3.3 MicroprocessorThe microprocessor controls the functions of the unit. A 4.19MHz clock, controlledby XL2, provides the basic timing for the system.Data received from IC402 is processed by the microprocessor and stored in theSRAM chip, IC4. The microprocessor then causes the selected Alert to operate andsends the message to the LCD module for display. Outputs from pin 5 (LCD-CS),pin 39 (AD17), pin 38 (AD16) and pin 60 (WR) control the transfer of data to the LCDmodule on the databus. Outputs from pins 2 and 7 control the operation of the audioalert and the vibrate motor.IC3 also controls the internal functions of the system, displaying the symbols andchanging the modes when selected by the three buttons on the front of the unit.3.3.4 EEPROMThe EEPROM (IC1) holds information applicable to the unit, such as: Serial Number;RIC codes; Radio parameters. The information is sent to the microprocessor throughthe serial data link, pins 62, 63 and 64.3.3.5 SRAMThe SRAM (IC4) is a 256k device which can store up to 32k of 8-bit information.Address lines AD00 through AD14 and control lines RAM-CE and WR from themicroprocessor, control the flow of data in and out of the device on the databus.3.3.6 LCD ModuleThe LCD Module produces the required characters and the symbols for the integraldisplay. Address lines AD16 and AD17 and control lines LCD-CS and WR from themicroprocessor, control the flow of data to the device on the databus.

TLA 852/FLA 872TM1205 Issue 2 Page 3 - 9C20 and C21 are part of the internal DC/DC converter of the module’s negative biassupply.R11, R12, R13, C17 and C22 through C25 are part of the circuit which controls thevoltage to the LCD driver.3.3.7 Display IlluminationTwo miniature lamps are used to illuminate the LCD display. The lamps are selectedON or OFF using the buttons on the front panel. The ‘Lamp ON/OFF’ signal, whichcomes from pin 8 of the microprocessor, controls transistor TR2 in the lamp circuitof the TLA852, or TR7/IC2 for the EL display in the FLA 872. 3.3.8 Alertsa) Audible Alert (Beep)The transducer, SP401, and the driver circuits TR415 and TR416, are locatedon the radio board. The audible alert signal from IC3, pin 2 connects to TR415through SK1/PL401 pin14. The alert can be selected ON or OFF using thebuttons on the front panel.b) Vibrate AlertThe vibrate motor is operated by transistors TR3 and TR4 on the decoderboard. The vibrate alert signal from IC3, pin 7 connects to pin 1 of TR3. Thealert can be selected ON or OFF using the buttons on the front panel.3.4 POWER SUPPLIESThe primary power supply for the unit is a single 1.5 volt, AAA battery (BAT1). Thesupply from the battery (B+) connects directly to the display illumination and vibratemotor circuits, that require relatively high currents. B+ also connects to the radioboard through SK1/PL401, pin 9 and to the voltage converter, IC6, on the decoderboard. IC6 and its associated components supply the +3.1 volts (VDD) for the unit. TR5, T1,C9, C11, C26, R10 and D1 form an oscillator giving a frequency between 5kHz and20kHz. The output is rectified by D1 and smoothed by C12. IC6 samples the voltageand if it exceeds 3.1 volts, IC6 causes TR6 to switch off and stop the oscillator.When the pager circuits take current, the voltage drops and the oscillator is turnedon again. This produces a sawtooth voltage on the 3 volt rail which gives less RFnoise than other converter circuits. In addition to supplying the 3.1 volts, the circuit charges the backup supply (BAT2)through resistor R6. Double diode D2 provides isolation for the two circuits.

TLA 852/FLA 872TM1205 Issue 2Page 3 - 10IC5 monitors the voltage of VDD and resets the decoder circuits if the voltage dropsto a level that would cause data corruption.Transistor TR1, connected to pins 6 and 15 of IC3, detects the battery voltage. IfBAT1 is removed, the drop in B+ causes transistor TR1 to switch OFF which sets themicroprocessor to low-current mode. In this mode BAT2 supplies sufficient powerto keep the microprocessor and the SRAM operational for up to 60 minutes. The 1 volt supply for the receiver circuits is provided by transistor TR406 and itsassociated components. The circuit is a series regulator and is maintained withinspecification by a control circuit in IC401.

TLA 852/FLA 872TM1205 Issue 1 Page 4 - 2SECTION 4INSTALLATION AND COMMISSIONINGThere are no installation and commissioning procedures for the Radio Paging ReceiverModels TLA 852 and FLA 872.

TLA 852/FLA 872TM1205 Issue 2Page 4 - 2INTENTIONALLY BLANK

TLA 852/FLA 872TM1205 Issue 1 Page 5 - 2SECTION 5SERVICINGCONTENTS: Page5.1 SERVICE POLICY 5 - 35.2 ROUTINE MAINTENANCE 5 - 35.3 WORKSHOP PROVISIONS 5 - 35.4 TEST EQUIPMENT, TOOLS AND ANCILLARIES 5 - 35.4.1 Test Equipment 5 - 35.4.2 Tools and Ancillaries 5 - 45.5 DISASSEMBLY 5 - 45.5.1 Case Removal 5 - 45.5.2 Board Assembly Removal 5 - 55.5.3 Board Separation 5 - 55.5.4 LCD Module Removal 5 - 65.5.5 Vibrate Motor Removal 5 - 65.5.6 Battery Contacts Removal 5 - 65.6 ASSEMBLY 5 - 75.6.1 Battery Terminal Installation 5 - 75.6.2 Vibrate Motor Installation 5 - 75.6.3 LCD Module Installation 5 - 85.6.4 Board Assembly 5 - 85.6.5 Board Assembly Installation 5 - 85.6.6 Case Assembly 5 - 85.7 FAULT FINDING 5 - 95.7.1 General 5 - 95.7.2 Fault Diagnosis 5 - 95.7.3 Power Supply Voltage Adjustment 5 - 95.7.4 Battery Low Circuit Test 5 - 105.8 RADIO ALIGNMENT PROCEDURE 5 - 225.8.1 Preparation 5 - 225.8.2 Alignment Procedure 5 - 225.8.3 Pager Sensitivity Measurement (Coarse) 5 - 245.8.4 Pager Sensitivity Measurement (Fine) 5 - 255.9 PROGRAMMING 5 - 255.9.1 General 5 - 255.9.2 Equipment 5 - 255.9.3 Procedure 5 - 25

TLA 852/FLA 872TM1205 Issue 2Page 5 - 2TABLES Page 5.1 Radio Board DC Voltage Levels 5 - 145.2 Radio Board Test Points 5 - 145.3 Decoder Board DC Levels 5 - 155.4 Decoder Board Test Sequence 5 - 155.5 IC3 Microprocessor Pin Connections 5 - 195.6 IC4 RAM Pin Connections 5 - 205.7 LCD Display Pin Connections 5 - 21FIGURES:5.1 Battery Door 5 - 45.2 Case Front Removal 5 - 55.3 Exploded View of Unit 5 - 75.4 Connections between Radio Board and Decoder Board 5 - 105.5 Fault Finding Guide (Sheet 1 of 3) 5 - 115.6 Fault Finding Guide (Sheet 2 of 3) 5 - 125.7 Fault Finding Guide (Sheet 3 of 3) 5 - 135.8 Decoder Board Waveforms 5 - 165.9 Display Module Waveforms 5 - 175.10 Semiconductor Connection Details 5 - 185.11 Radio Alignment Test Equipment 5 - 225.12 P671A Showing the Tuning Points 5 - 235.13 Configuration for Coarse Sensitivity Measurement 5 - 245.14 Polystyrene Block for TEM Cell Test - Dimensions 5 - 26CAUTIONSTATIC SENSITIVE DEVICES ARE USED IN THIS EQUIPMENT. TAKE CARE DAMAGEIS NOT CAUSED TO THESE DEVICES BY HIGH LEVELS OF STATIC ELECTRICITY.

TLA 852/FLA 872TM1205 Issue 2 Page 5 - 35.1 SERVICE POLICYExcept for Routine Maintenance, repairs are only to be performed by qualifiedpersonnel in authorised workshops.The unit can be repaired to component level. The display module is a disposableitem. If any screening cans are removed for access to components, they must berefitted flush to the printed circuit board.5.2 ROUTINE MAINTENANCEThis is limited to battery replacement and surface cleaning of the outer case. Cleanthe case with a lint free cloth moistened with soapy water. Do not use spirit or othersolvents as they can damage the case.5.3 WORKSHOP PROVISIONSRepair workshops must be free from hostile radio interference or otherwise equippedwith Faraday cages. Suitable equipment must be available to remove and install thesurface mounted components which are used in this unit.5.4 TEST EQUIPMENT, TOOLS AND ANCILLARIES5.4.1 Test EquipmentThe following test equipment is required:!IBM PC or compatible personal computer!Programming Software P669H!P645 Test Encoder!P645A POCSAG Test Encoder Software!RF Signal Generator!Oscilloscope!Millivoltmeter with high impedance, low capacitance probe!Alignment and Fault-Finding Jig P671, P671A, P671B!SINAD Meter!AC Millivoltmeter!Digital Multimeter

ABPUSH THE LONG EDGE OF THEBATTERY DOOR UPWARDS TO OPEN ITPUSH THE DOOR LOCK TORELEASE THE BATTERY DOORSLIDE THE BATTERY DOORFORWARDTAG11126-1TLA 852/FLA 872TM1205 Issue 2Page 5 - 4Figure 5.1: Battery Door5.4.2 Tools and AncillariesThe following tools and ancillaries are required:!DC Power Supply, 1-1.5 volts.!Cross-point Screwdriver!Surface Mount Handling Tools!Anti-static Workstation5.5 DISASSEMBLY5.5.1 Case Removala) Refer to Figure 5.1. Use a thumbnail to press down on the battery door lock onthe back of the unit. Hold the door lock down and push the battery door in thedirection shown. Rotate the door as shown in Figure 5.1 to get access to thebattery.b) Remove the battery.c) Remove the two, 2.2mm x 6mm cross-head screws from the Case Back.

APPLY PRESSUREWITH FINGERSTO SIDES OF CASELIFT FRONT EDGE OF CASE FRONTUNTIL REAR CATCHES DISENGAGETAG11213-1>TLA 852/FLA 872TM1205 Issue 2 Page 5 - 5Figure 5.2: Case Front Removald) Remove the Case Back by applying pressure to the sides of the case, as shownin Figure 5.2, and lifting the front edge of the Case Front until the rear catchesdisengage.5.5.2 Board Assembly Removala) Remove the Case Back (see paragraph 5.5.1).b) Carefully lift the Board Assembly at the long edge next to the LCD Module.When the edge of the Board Assembly is clear of the case, pull the assemblyaway from the case.5.5.3 Board Separationa) Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2).b) Carefully pull the front edge of the boards apart to disconnect the connectorbetween the boards.c) Pull the Decoder Board forward to release the LCD Module from under theaerial.d) To get access to the Radio Board components, remove the rubber mat.

TLA 852/FLA 872TM1205 Issue 2Page 5 - 65.5.4 LCD Module Removala) Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2)and separate the Decoder Board from the Radio Board (see paragraphs 5.5.3.,a) through c)).b) Release the two module pins from the holes in the Decoder Board and carefullyfold the module away from the board to get access to the flexible cable.c) Use the Anti-static Workstation and the correct soldering tools to disconnect theflexible cable from the board.5.5.5 Vibrate Motor Removala) Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2)and separate the Decoder Board from the Radio Board (see paragraphs 5.5.3.,a) through c)).b) Use the Anti-static Workstation and the correct soldering tools to disconnect thetwo wires from the board.c) Use a screwdriver to lever the Vibrate Motor carefully from the clip.5.5.6 Battery Contacts Removala) Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2).b) Pull the contacts out of their slots in the Case Back.

31TAG11214-1245671113109812TLA 852/FLA 872TM1205 Issue 2 Page 5 - 7 1. Case Front Assembly 2. LED Display 3. Decoder Board Assembly 4. Radio Board Assembly 5. Case Back Assembly 6. Battery Positive Contact 7. Case Fixing Screw 8. Battery Door 9. Case Fixing Screw10. Battery Negative Contact11. Rubber Mat12. Moulding Bezel LCD13. Display GasketFigure 5.3: Exploded View of Unit5.6 ASSEMBLY5.6.1 Battery Terminal Installationa) Refer to Figure 5.3 for the correct orientation of the terminal.b) Push the terminal into the slot in the Case Back.5.6.2 Vibrate Motor Installationa) Install the Vibrate Motor in the clip.b) Use the Anti-static Workstation and the correct soldering tools to connect thetwo wires to the Decoder Board.

TLA 852/FLA 872TM1205 Issue 2Page 5 - 85.6.3 LCD Module Installationa) Use the Anti-static Workstation and the correct soldering tools to connect theflexible cable to the Decoder Board.b) Carefully fold the flexible cable and install the two pins on the rear of themodule in the holes on the Decoder Board.5.6.4 Board Assemblya) Make sure that the Rubber Mat is correctly installed on the Radio Board.b) Put the Decoder Board on the Rubber Mat. Make sure that the four smallextensions at the rear of the LED Module are located under the aerial.c) Align SKT1 with PL401 and carefully press the two boards together until theconnectors are fully connected.5.6.5 Board Assembly Installationa) Slide the Board Assembly into the Case Back.b) Make sure that the Battery Connector ‘fingers’ are in the correct positionunder the Decoder Board.c) Push down on the front edge of the board and slide the board under thesmall extensions on the Case Back.d) Push the rear edge of the Board Assembly into the Case Back.5.6.6 Case Assemblya) Install the Case Front on the Case Back by applying pressure to the sides ofthe case and pushing the rear edges of the case together until the catchessnap in place.b) Install the two 2.2mm x 6mm screws in the Case Back.c) Open the Battery Door and install the battery.d) Close the Battery Door and push it towards the top of the unit until it locks.

TLA 852/FLA 872TM1205 Issue 2 Page 5 - 95.7 FAULT FINDING5.7.1 GeneralRefer to the Fault Finding Guide (Figures 5.5 through 5.7) and the informationgiven in Tables 5.1 through 5.8 and Figures 5.8 through 5.10 to help resolveproblems. Alignment information is in paragraph 5.8. Programming information isgiven in paragraph 5.9.Faults can be caused by user negligence. Always check the unit for these faults:a) Damage to the Case or LCDb) Water damagec) Corrosion damage or leaking batteryAny metal parts which are corroded must be removed. Clean the affected area ofthe Board assembly with a non-corrosive contact cleaner. Dry the area with alow-pressure flow of warm air (40 EC through 50 EC). Install new parts.5.7.2 Fault DiagnosisPut a known good battery in the unit and switch ON the unit. Refer to the Fault-Finding Guide (Figures 5.5 through 5.7). If it is suspected that the Decoder Boardis faulty, proceed as follows:a) Remove the Board Assembly from the case (see paragraphs 5.5.1 and5.5.2).b) Separate the Decoder Board from the Radio Board (see paragraph 5.5.3).c) Disable the Battery Economy function by fitting a 0 ohm resistor in theposition for R456 (side 2 of the radio board near IC402).d) Use the 14-way lead (supplied with the P671B) to connect the two boards(refer to Figure 5.4)e) Put the boards on an anti-static mat and connect a 1.5 volt supply to theDecoder Board. Switch ON the power supply.f) Connect a ’10-times’ probe to the oscilloscope and measure the points givenin Table 5.4. Compare the waveforms on the oscilloscope with those shownin Figure 5.9.5.7.3 Power Supply Voltage AdjustmentThere is no adjustment for the 1 volt, 1.5 volts or 3 volts power supplies.

14 1PL401 SK1LOWBATSCKSDORESETBEC7 7TAG11336-138.4kHzSDIBEEPPGMATTNVDDGNDB+AREA18148TLA 852/FLA 872TM1205 Issue 2Page 5 - 10Figure 5.4: Connections between Radio Board and Decoder Board5.7.4 Battery-Low Circuit TestTo check the Battery-Low circuit:a) Connect the variable DC power supply to the unit and set the output to0.9 volts.b) Switch ON the unit. The unit should go through the normal ‘start-up’procedure (beep and vibrate for one second and show the programmableswitch-on message for three seconds). After approximately two minutes thelow battery symbol will appear.c) Switch OFF the unit but do not switch OFF or disconnect the variable DCpower supply. Set the output of the variable DC power supply to 1.2 volts.d) Switch ON the unit. Make sure that the unit goes through the normal ‘start-up’ procedure.

PAGERSUSPECTFIT A NEW BATTERY AND SWITCH ON.IS THE ‘SWITCH ON’ MESSAGEIS DISPLAY BLANKOR CORRUPTED?CORRUPTED EEPROM.RE-PROGRAM. RE-TEST.CORRUPTEDBLANKNO YESSEQUENCE?IS BEEP AUDIBLEAT SWITCH-ON?IS BEEP AUDIBLEAT SWITCH-ON?DE-CASE AND CHECKDISPLAY MODULE, VDD ANDYESNODE-CASE AND CHECKSP401, TR416, TR415.YESNOINTERCONNECTIONS.DE-CASE AND CHECKDISPLAY, VDD, IC1, IC3, IC4, AND POWER SUPPLIES. 'A''A''B''A'TAG11127-1TLA 852/FLA 872TM1205 Issue 2 Page 5 - 11Figure 5.5: Fault Finding Guide (Sheet 1 of 3)

IS THE CALL RECEIVED?CHECKREALIGN ANDDE-CASE. PLACE IN P671.CHECK 1V LINE.IS LEVEL 1V ±50mV?CHECK TP416, TR406,IC401.SEND PRE-AMBLE.AT 50dBm WITH±4.5kHz DEVIATION.IS DATA PRESENT ONIC401 PIN 18?IS DATA PRESENT ONIC401 PIN 12?CHECK IC402,PINS 4, 9, 12, 13 AND 14CHECK IC401IS DATA PRESENT ONIC401 PIN 11?IS 455kHz PRESENT ONIC401 PIN 10?IS VOLTAGE ONIC401 PIN 17 >1.3V?CHECK FL404 AND IC401 FAULTY.CHECK IC402AND R457.CHECK R425, R429IC401.IS 455kHz PRESENT ONIC401 PIN 6?SENSITIVITY.RECEIVERRE-TEST O.K.NOLOW>3dBmO.K.YESNOYESYESNOYESNOYESNOYESNOYESNO YESNO‘B’‘C’PLACE THE UNIT IN THEP671. SEND A CALL.TAG11134-1‘B’TLA 852/FLA 872TM1205 Issue 2Page 5 - 12Figure 5.6: Fault Finding Guide (Sheet 2 of 3)

(IC401, PINS 1 AND 2)>200mV?REMOVE SHORT FROMC407/R446 TO 0V.CHECK XL401CHECK IC401IS TR403 (1st MIXERO/P) >3mV?CHECK TR410, L408AND XL402.CONNECT TR410 BASECHECK TR403IS 455kHz PRESENT ONTP405?FL402 OR C444 FAULTY.CHECK FL401, L410 ANDR444 (172MHz board).TO 0V. IS RF LEVEL ATNOYESYESNOYESNO YESYESYESNO‘C’SHORT JUNCTION OFC407/R446 TO 0V.IS IC401, PIN 24 >3mV?(TR410 COLLECTOR)>25mV?TR403 BASE >3mV?AND L406.IS RF AT TR402NOCOLLECTOR >3mV?CHECK TR401,TR 402, L401, L416.YESNOYESNOCHECK FL405TAG11339-1‘B’IS 2nd LOCAL OSC. O/PIS 1st LOCAL OSC. O/PR479 (280MHz board).TLA 852/FLA 872TM1205 Issue 2 Page 5 - 13Figure 5.7: Fault Finding Guide (Sheet 3 of 3)

TLA 852/FLA 872TM1205 Issue 2Page 5 - 14COMPONENT COLLECTOR BASE EMITTER COMMENTSTR401 0.29 0.73 0RF AmplifierTR402 0.87 1.02 0.29 RF AmplifierTR403 0.845 0.678 0First MixerTR404 0.733 0.015 0AGC SwitchTR406 1.018 0.791 1.4 1V Series RegulatorTR410 0.95 0.937 0.264 First Local OscillatorTR415 1.4 -0Beep EnableTR416 1.4 -0Transducer DriverTable 5.1: Radio Board DC Voltage LevelsTEST POINT DESCRIPTION VOLTAGE / SIGNAL401 SINAD Output 0.56Volts402 Radio Supply 1Volt403 RSSI (AGC) 0.060Volts404 Radio Ground 0Volts405 Second IF 455kHz406 Radio Ground 0Volts414 Radio Ground 0Volts416 Battery + 1.4Volts418 Radio Ground 0VoltsTable 5.2: Radio Board Test PointsNOTE: All radio board measurements were taken with the receiver turned on. The batteryterminal voltage was 1.4 volts, the 1 volt line was 1.019 volts and battery economy wasdisabled. Voltages may vary by ±20mV.

TLA 852/FLA 872TM1205 Issue 2 Page 5 - 15DEVICE COLLECTOR BASE EMITTER REMARKSTR1 3.00 3.00 1.4 Battery Disconnect MonitorTR2 -3.00 1.4 Backlight DriverTR3 1.4 - - Vibrate EnableTR4 1.4 - - Vibrate Motor DriveC5 0.19dc 2.2 V p-p 4ms wide XL2 4.19MHzR1/C4 3.00R35 1.49dc 3.0V p-p CLKO 38.4kHzIC402 pin9 1.49dc 3.0V p-p XL403 38.4kHz (Radio Board)IC5 3.00 (pin 1) 3.00 (pin 2) 0 (pin 3) ResetIC6 1.4 (pin 1) 3.00 (pin 2) 1.4 (pin 5) VDD SupplyTable 5.3: Decoder Board DC LevelsSTEP TEST POINT REMARKS1R23 VDD2R35 38.4kHz POCSAG Clock3R1 4.19MHz Microprocessor Clock (every 500ms)Table 5.4: Decoder Board Test Sequence

VOLTSTIME2.2V0.19V4.19MHz WITHIN THE ENVELOPE4msWAVEFORM AT R1/C4VOLTSTIME4msTAG11333-1WAVEFORM AT C50V3VVOLTS0V1.49V3V p-p 38kHzWAVEFORM AT R1/C4WAVEFORM AT R35 AND IC402, PIN9TIMETLA 852/FLA 872TM1205 Issue 2Page 5 - 16Figure 5.8: Decoder Board Waveforms

1.6ms TIME0VWAVEFORM AT PIN 393V p-pVOLTS1.6ms TIME0VWAVEFORM AT PIN 45 3VVOLTS1.6ms TIMEWAVEFORM AT PIN 400V6V p-pVOLTSTIME1.6msWAVEFORM AT PIN 410V6V p-pVOLTS1.6ms TIME0VWAVEFORM AT PIN 383V p-pVOLTSTAG11132-1TLA 852/FLA 872TM1205 Issue 2 Page 5 - 17Figure 5.9: Display Module Waveforms

CBETR2, 4 112 1324IF INOSC BASEIF DE-COUPLEQUAD INRF INGROUNDREG INBATTERY ALARMFSK OUTPOWER SAVESHAPING CAPPRI SHAPING CAPQUICK CHARGEFILTER OUTDET OUTFILTER INOSC EMITTIF DE-COUPLEIF OUTIC401TAG11264-1 14 58VCCTESTSDAA2 IC1VSSA0EXCEPT FOR THE LCD MODULE,ALL DEVICES ARE VIEWED FROM ABOVE.IC374964481716µP3233 1 16IC402IC4 13NCOUT 54IC5MIXER OUTVcc REG OUTRSSI OUTRSSI IN98BS1BS2BS3SIGNALXVSSXTXTNVSSVDDATTNSDISDOSCKAREARSTNCLKO1288122 21Module) (Rear of A1SCLVddNCVss511LCM407, 410, 414TR401, 402, 403, 4063 (C)1 (B) 2 (E)TR1, 3, 415NOT TO SCALE.SONY(NEC CONFIGURATION )(1)(14) (15)(28)( )( )(IS SHOWN IN PARENTHESIS)IC6TLA 852/FLA 872TM1205 Issue 2Page 5 - 18 Figure 5.10: Semiconductor Connection Details

TLA 852/FLA 872TM1205 Issue 2 Page 5 - 19Pin Number Pin Name Description1P30 PGM - programming input2P31 BEEP - output signal3P32 ROM-CE - CGROM (IC2) chip enable4P33 RAM-CE - SRAM (IC4) chip enable5P34 LCD-CS - Display chip select6P35 µP (IC3) low current mode switch7P36 Vibrate Motor - output signal8P37 Lamp - output signal 9VSS Ground10-12 P40-P42 SW1-SW3 - input signal13,14,16,17 NC Not Used15 P45 µP (IC3) low current mode switch18-23,25-34,38,39 P50-P57,P60-P67,P02,P03 Address lines AD00-AD1724 VSS Ground35 RESET µP reset - input signal36 P00 AREA (No valid data) - input signal37 P01 ATTN (Valid data) - input signal40 VDD VDD41 X2 Xtal oscillator42 X1 Xtal oscillator43,46 VPP/IC,AVSS Ground44 NC Not Used45 P04/XT1 POCSAG clock - input signal47-54 D00-D07 Data lines55 AVDD VDD56 AVR Ground57 P20 SDO - Data input signal58 P21 SDI - µP info. to POCSAG decoder59 P22 SCK - Data transfer clock60 WR Display and RAM - Read/write control61 P24 LOWBAT - output signal62,63,64 P25,P26,P27 Serial Data input from EEPROM (IC1)Table 5.5: IC3 Microprocessor Pin Connections

TLA 852/FLA 872TM1205 Issue 2Page 5 - 20Pin Number Pin Name Description1A14 Address line AD142A12 Address line AD123A7 Address line AD074A6 Address line AD065A5 Address line AD056A4 Address line AD047A3 Address line AD038A2 Address line AD029A1 Address line AD0110 A0 Address line AD0011 D0 Data line D0012 D1 Data line D0113 D2 Data line D0214 VSS Ground 15 D3 Data line D0316 D4 Data line D0417 D5 Data line D0518 D6 Data line D0619 D7 Data line D0720 CE RAM-CE - chip enable input21 A10 Address line AD1022 OE Ground23 A11 Address line AD1124 A9 Address line AD0925 A8 Address line AD0826 A13 Address line AD1327 WE WR - RAM read/write control28 VDD VDDTable 5.6: IC4 RAM Pin Connections

TLA 852/FLA 872TM1205 Issue 2 Page 5 - 21Pin Number Pin Name Description 1 NC Not Connected 2-6 V5-V1 LCD driver supply voltages 7 VDD VDD 8 M/S VDD 9 RESET Reset - input signal10 SCL VDD11 SI VDD12 P/S VDD13 CS1 LCD-CS - chip select 14 CS2 VDD15 C86 Ground16 A0 AD16 - display address input signal17 WR WR - LCD write enable input signal18 RD AD17 - read enable input signal19 VSS Ground20-27 D0-D7 D00-D07 - Data lines28-31 DYO, CLO, SYN, FR Not Used32 CL Ground33 OSC1 LCD Oscillator34 OSC2 LCD Oscillator35-37 T2, T1, VSS Ground38 CAP1+ DC/DC voltage converter capacitor 139 CAP1- DC/DC voltage converter capacitor 140 CAP2+ DC/DC voltage converter capacitor 241 CAP2- DC/DC voltage converter capacitor 242 VOUT DC/DC voltage converter output43 V5 LCD driver supply voltage44 VR Voltage adjustment terminal45 VDD VDD46-50 V1-V5 LCD driver supply voltages51 NC Not ConnectedTable 5.7: LCD Display Pin Connections

SIGNAL COUNTERHFGENERATORSINADP671A OSCILLO-SCOPEMETERAUDIO OUT1kHz MODULATIONINPUT455kHzRF IN10dBATTENUATORTLA 852/FLA 872TM1205 Issue 2Page 5 - 22Figure 5.11: Radio Alignment Test Equipment5.8 RADIO ALIGNMENT PROCEDURE5.8.1 Preparationa) Remove the Board Assembly from the Case (see paragraph 5.5.2).b) Install a 0 ohm resistor or a shorting link in the position for R456, to disablethe BEC.c) Disable the AGC circuit by connecting TP403 to 0 volts. Alternatively, liftR409.5.8.2 Alignment Procedurea) Configure the test equipment as shown in Figure 5.11. Set the signalgenerator to the channel frequency with an output of -10dBm.b) Put the Board Assembly in the tray of the P671A Alignment Jig and connectthe frequency counter probe to TP405. Adjust CV405 to give a reading of455kHz ±50Hz at the frequency counter.c) Adjust CV406 for maximum amplitude of the 455kHz signal on theoscilloscope. A minimum of 500 millivolts should be achieved.d) Remove the AGC disable and assemble the Board Assembly in the case. Remove the right hand label from the case back to expose the aerial trimmer.

ARMARM LOCKCV404CV406CV407ALIGNMENT PINS PROGRAMMING PINSCV405TLA 852/FLA 872TM1205 Issue 2 Page 5 - 23Figure 5.12: P671A Showing the Tuning Pointse) Put a known good battery in the unit (but leave the battery door off). Put theunit in the P671A jig, fold the jig arm over the unit and lock the arm inposition. f) Connect the SINAD meter to the alignment pins on the P671A (refer toFigure 5.12)g) Set the modulation of 1kHz to a deviation of 3 kHz and switch it ON. AdjustCV404 to give 12dB sinad with minimum RF input. A reading of -98dBshould be achieved.NOTE: Do not disturb the aerial during the next operation.h) Carefully remove the Board Assembly from the case. Remove the BECdisable 0 ohm resistor or the shorting link from R456 position. Carefullyassemble the Board Assembly in the case and put a new label on the caseback to cover the aerial trimmer access hole.

GENERATORSIGNALPCRF IN10dBATTENUATORP645TAG11331-1DATANOTE: THE DISTANCE BETWEEN THEPC AND THE P671A MUST BEGREATER THAN TWO METRESTLA 852/FLA 872TM1205 Issue 2Page 5 - 24Figure 5.13: Configuration for Coarse Sensitivity Measurement5.8.3 Pager Sensitivity Measurement (Coarse)To determine the pager sensitivity, configure the test equipment as shown inFigure 5.13 and do the procedure given in sub-paragraphs a) through e).NOTE: This is only an indication of sensitivity,which is dependent on the unitunder test being in a noise free environment.a) Set the signal generator to the channel frequency, at a deviation of 4.5kHzand an output level of -85dBm.b) Install a known good battery in the pager and switch it ON.c) Put the pager in the P671A and send a sensitivity call from the P645. Increase the signal generator output level, if necessary, to obtain a correctlyreceived call.d) Reduce the RF level in 1dB steps until the pager receives less than threecalls in five.e) Increase the RF level in 1dB steps until five consecutive calls are received. An output level of -98dBm should be acheived.5.8.4 Pager Sensitivity Measurement (Fine)Configure the equipment as described in paragraph 5.8.3 but connect a P800 TEMcell instead of the P671A. Follow the steps given in the TEM Cell Instructions forthe IEC method. Place the pager in the polystyrene block (refer to Figure 5.14)positioned centrally in the TEM Cell, with the display facing the input end. A levelof -103dBm or better should be achieved.

TAG11124-1+++60mm14mm 52mm20mm20mm+20mmø 5mm80mmTLA 852/FLA 872TM1205 Issue 2 Page 5 - 25Figure 5.14: Polystyrene Block for TEM Cell Test - Dimensions

CONNECT THE BLUE WIRE TO THIS PINCONNECT THE BROWN WIRE TO THIS PINP671ATLA 852/FLA 872TM1205 Issue 2Page 5 - 26Figure 5.15: Programming Lead Connections5.9 PROGRAMMING5.9.1 GeneralThe pager contains an EEPROM which holds unique data. The data may bealtered as shown in the following paragraphs.5.9.2 EquipmentThe following equipment is required:!P671A Alignment Jig!P669H Programming Software!Programming Cable!IBM PC or equivalent5.9.3 ProcedureProgram the receiver as follows:a) Remove the Battery Door from the Case Back.b) Put the unit face down in the tray of the P671A, lower the arm over the unitand lock the arm in position.c) Use the Progamming Cable to connect the programming pins of the P671Ato the PC serial port. Refer to Figure 5.15 and connect the correct colouredwire to each programming pin.d) Read the ‘Readme’ file contained in the relevant programming software. The‘readme’ file describes how to use the programming facility.

TLA 852/FLA 872TM1205 Issue 2 Page 6 - 1SECTION 6SPARE PARTS LISTCONTENTS: Page6.1 ASSEMBLIES 6 - 16.1.1 Modules 6 - 16.1.2 Case Parts 6 - 16.1.3 Batteries 6 - 26.1.4 Battery Packs 6 - 26.2 RADIO BOARD COMPONENTS 6 - 36.2.1 Capacitors 6 - 36.2.2 Banded Capacitors 6 - 36.2.3 Crystal and Filters 6 - 46.2.4 Inductors 6 - 46.2.5 Resistors 6 - 46.2.6 Semiconductors 6 - 56.2.7 Miscellaneous 6 - 56.3 DECODER BOARD COMPONENTS 6 - 66.3.1 Capacitors 6 - 66.3.2 Resistors 6 - 66.3.3 Semiconductors 6 - 66.3.4 Miscellaneous 6 - 7CAUTIONSTATIC SENSITIVE DEVICES ARE USED IN THIS EQUIPMENT. CARE MUST BE TAKENWHEN HANDLING THESE DEVICES AS THEY MAY BE DAMAGED BY HIGH LEVELS OFSTATIC ELECTRICITY.

TLA 852/FLA 872TM1205 Issue 2 Page 6 - 3CCT REF Band 1 Band 2 Band 3 Band 4 Band 5 Band 6C401,445 100p 100p 100p 100p 100p 100pC405, 455, 466 12p 12p 10p 10p 6p8 6p8C409 LINK LINK LINK LINK LINK LINKC432 3p9 3p9 3p9 3p9 3p9 3p9C446 1p 1p 1p 1p 1p 1pC465 4p7 4p7 4p7 4p7 4p7 4p7C467 18p 15p 12p 10p 8p2 6p8ITEM/CIRCUITREFERENCE DESCRIPTION PART No.6.2.3 MiscellaneousBATTERY CONTACT +VE 7361-4862BATTERY CONTACT -VE SPRING 7361-4861LANYARD (ELASTICATED) 7961-5055GASKET, DISPLAY SEAL 2561-5007SPACER MOULDING RUBBER VHF 0861-5209SCREW 2.2mm x 6mm PAN HEAD, S/TAP 8216-22966.3 RADIO BOARD COMPONENTS6.3.1 CapacitorsC403,410,412,414,472,473,484 CHIP 10n ±10% 50V 3327-0025C404,406,453,481 CHIP 220p ±5% 50V 3326-0031C407 CHIP 27p ±5% 50V 3326-0020C408,485,495 CHIP 22p ±5% 50V 3326-0019C418,423,425,444,450,452,469, CHIP 100n ±10% 16V 3332-0014C471,474,479,480 CHIP 100n ±10% 16V 3332-0014C426 CHIP 33p ±5% 50V 3326-0021C436,493,494,496 CHIP 22µ ±20% 4V 3412-0005C448 CHIP 3n3 ±10% 50V 3327-0019C449 CHIP 22n +80-20% 50V 3328-0009C470 CHIP 1µ -20/+80% 16V 3301-0277C483 CHIP 560p 3326-0036C486 CHIP 68n 3332-0012C490 CHIP 47µ ±20% 6.3V 3412-0110C492 CHIP 4.7µ 6.3V 3412-0104CV404,405,406,407 TRIMMER 10p, REAR ADJUSTMENT 3502-00186.3.2 Banded Capacitors

TLA 852/FLA 872TM1205 Issue 2Page 6 - 4CCT REF Band 1 Band 2 Band 3 Band 4 Band 5 Band 6L401 82n 82n 68n 68n 68n 56nL406, 410 2µ2 2µ2 2µ2 2µ2 2µ2 2µ2L407 100n 100n 100n 100n 100n 100nL408 330n 330n 270n 270n 270n 270nL409 560n 560n 470n 470n 390n 390nL416 68n 68n 56n 56n 47n 47nL417 47n 47n 39n 39n 33n 33nL418 N/F N/F N/F N/F N/F N/FDESCRIPTION PART No. DESCRIPTION PART No. 1p ±0.25% 50V 3326-0015 12p ±5% 50V 3326-0016 3p9 ±0.25p 50V 3326-0010 15p ±0p5 50V 3326-0017 4p7 ± 0p25 50V 3326-0011 18p ±0p5 50V 3326-0018 6p8 50V 3326-0013 100p ±5% 50V 3326-0027 8p2 50V 3326-001410p ±0p5 50V 3326-0015 LINK (RES CHIP 0S)3115-0001ITEM/CIRCUITREFERENCE DESCRIPTION PART No.6.3.3 Crystal and FiltersFL401 CRYSTAL FILTER 21.4MHz 4001-0025FL402, 403 CERAMIC FILTER, SMD, 10/12.5kHz 4018-0004FL402, 403 CERAMIC FILTER, SMD, 20/25kHz 4018-0002FL404 FILTER CHIP CDBC455CX25-TC 4003-0005XL401 CRYSTAL 20.945MHz 3915-0017 XL402 CRYSTAL, GENERIC SPEC 3948-*XL402 CRYSTAL, GENERIC SPEC 3950-*XL403 MICRO CRYSTAL MX1V-TL 76.8 kHz 3922-0012* QUOTE CHANNEL FREQUENCY TO SIX DECIMAL PLACES6.3.4 InductorsDESCRIPTION PART No. 68n ±10% 4117-0020 2µ2 ±10% 4103-0233 82n ±10% 4117-0021 39n ±10% 4117-0017 47n ±10% 4117-0018 56n ±10% 4117-0019

TLA 852/FLA 872TM1205 Issue 2 Page 6 - 5DESCRIPTION PART No.100n ±5% 4103-0254270n ±5% 4103-0264330n ±5% 4103-0266390n ±5% 4103-0268470n ±5% 4103-0270560n ±5% 4103-0272ITEM/CIRCUITREFERENCE DESCRIPTION PART No.6.3.5 ResistorsR5, 8, 472-478 CHIP 0S 62m5W 3115-0001R401,403,439,470 CHIP 100S ±5% 62m5W 3115-0050R402,405 CHIP 18k ±5% 62m5w 3115-0104R404,438 CHIP 680S ±5% 62m5W 3115-0070R406 CHIP 1k ±5% 62m5W 3115-0074R408 CHIP 330S ±5% 62m5W 3115-0062R410 CHIP 33S ±5% 62m5W 3115-0110R412 CHIP 3k3 ±5% 62m5w 3115-0086R416 CHIP 82k, 10/12.5kHz 3115-0120R416 CHIP 39k ±5% 62m5, 20/25kHz 3115-0112R420,455,457,471 CHIP 100k ±5% 62m5W 3115-0122R425, 428, 429 CHIP 180k ±5% (512 BAUD) 3115-0128R425, 428, 429 CHIP 82k (1200 BAUD) 3115-0120R425, 428, 429 CHIP 39k ±5% (2400 BAUD) 3115-0112R434,446 CHIP 15k ±5% 62m5W 3115-0102R440 CHIP 220S ±5% 62m5W 3115-0058R443 CHIP 5k6 ±5% 62m5W 3115-0092R444 CHIP 2K7 ±5% 62m5W 3115-0084R458,459 CHIP 10S ±5% 62m5W 3115-00266.3.6 SemiconductorsIC401 IC TK14590V 3825-0002IC402 IC POCSAG DECODER 3820-0025TR401,402,403,410 TRANSISTOR NE85619 3601-0013TR406 TRANS PNP. BC808-40W 3602-0058TR415 TRANS RN1305 3611-0002TR416 TRANS 2SD1757KS 3602-00386.3.7 MiscellaneousAE401 AERIAL, TOP, VHF 5561-5254AE402 AERIAL, BOTTOM, VHF 5561-5255PL401 HEADER 14-WAY 4332-0002SP401 TRANSDUCER 5004-0007

TLA 852/FLA 872TM1205 Issue 2Page 6 - 6ITEM/CIRCUITREFERENCE DESCRIPTION PART No.6.4 DECODER BOARD COMPONENTS6.4.1 CapacitorsC3,6,8,10,14,19,20-25 CHIP 100n ±10% 16V 3332-0014C4,5 CHIP 27p ±5% 50v 3326-0020C9,11 CHIP 1n ±10% 50V 3327-0013C12,15 CHIP 47µ ±20% 6V3 3412-0110C13 CHIP 100p ±5% 50v 3326-0027C17,18,26 CHIP 1µ -20/+80% 16V 3301-0277C 28 (FLA) CHIP 100n ±10% 16V 3332-0014C 29 (FLA) CHIP 180p ±5% 50V 3326-00306.4.2 ResistorsR1 CHIP 1k5 ±5% 62m5W 3115-0078R2-5,18,19,29 CHIP 100k ±5% 62m5W 3115-0122R6,7,17,26,27,30,31,34-36 CHIP 10k ±5% 62m5W 3115-0098R8 CHIP 47S ±5% 62m5W 3115-0042R9 CHIP 1k ±5% 62m5W 3115-0074R10 CHIP 18k ±5% 62m5w 3115-0104R11,21,22 CHIP 470k ±2% 62m5W 3118-0138R12,20 CHIP 150k ±2% 3118-0126R13 CHIP 680k ±2% 3118-0142R14,28 CHIP 1M ±2% 0603 3118-0146R15,16 CHIP 220S ±5% 62m5W 3115-0058R23,24,25,99,103 CHIP 100S ±5% 62m5W 3115-00506.4.3 SemiconductorsD1 DIODE, CHIP BAT 74 3710-0002D4 DIODE RB715F 3710-0005D2 (FLA) DIODE, CHIP BAV 99 3703-0001IC1 IC 512X8 EEPROM 3818-0006IC2 (FLA) IC SP4425 EL LAMP DRIVER 3818-0027IC4 IC 32KX8 SRAM 3821-0009IC5,6 IC VOLTAGE DETECTOR 2V0 6003-0011TR1 CHIP TRANS DTC115TUA 3611-0004TR2,6,7 TRANS PNP. BC808-40W 3602-0058TR3 TRANS RN1305 3611-0002TR4,5 TRANS 2SD1757KS 3602-0038TR7 (FLA) TRANS PNP BC808-40W 3601-0058

TLA 852/FLA 872TM1205 Issue 2 Page 6 - 76.4.4 Banded Component: IC3TLA 852 FLA 872STANDARD (LATIN) 0501-0224 0501-0211 (OTP)3835-0017 (MASKED)STANDARD (CYRILLIC) 3835-0012 0501-0212 (OTP)3835-0018 (MASKED)"ZAP!" (MASKED) 3835-0020Z-PAGE 0501-0228MOROCCO 0501-0198 (OTP)3835-0010 (MASKED)ITEM/CIRCUITREFERENCE DESCRIPTION PART No.6.4.5 MiscellaneousBAT2 CAPACITOR, POLYESTER, PAS621L-VL5 3331-0002LP1,2 LAMP HE1-5VXXMA 5202-0007SK1 HEADER DUAL ROW RECEPT14WAYSMD 4449-0002SW1,2,3 SWITCH SMD KSR221G 4202-0026T1 TOROID SERIES 5CT 5301-0001L25 INDUCTOR 680FH 20% 4124-0018XL1 CRYSTAL 4.194304MHz SMD 3915-0019DIFFUSER, DISPLAY 2361-5008DISPLAY LCD EMC-A0861-1(EPSON) 5206-0019LABEL DISPLAY BLANK TLA850 2061-5108MOULDING, LCD BEZEL (EPSON) 0861-4878EL1 ELECTRO-LUMINESCENT PANEL 5261-6071MOTOR VIBRATE (WITH BRACKET) 6502-0007

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TLA 852/FLA 872TM1205 Issue 2 Page 7 - 1SECTION 7DIAGRAMSCONTENTS Source Drawing Page7.1 Radio Board (PCB 3061-5374 Iss. 1) 2961-5375 Iss. 5 7-3/4Circuit Diagram (Sheet 1 of 2) (Sheet 2)7.2 Radio Board (PCB 3061-5374 Iss. 1) 2961-5375 Iss. 5 7-5/6Circuit Diagram (Sheet 2 of 2) (Sheet 1)7.3 Radio Board (PCB 3061-5374 Iss. 1) 0261-5373 Iss. 2 7-7/8Component Layout - Side 1 (Sheet 1)7.4 Radio Board (PCB 3061-5374 Iss. 1) 0261-5373 Iss. 2 7-9/10Component Layout - Side 2 (Sheet 2)7.5 Decoder Board (PCB 3061-5169 Iss. 1) 2961-5167 Iss. 2 7-11/12Circuit Diagram7.6 Decoder Board (PCB 3061-5169 Iss. 1) 0261-5168 Iss. 1 7-13/14Component Layout7.7 Decoder Board (PCB 3061-5169 Iss. 1) 0261-5168 Iss. 1 7-15/16Component Layout7.8 Decoder Board With EL Display (FLA) 2961-5878 Iss. 1 7-17/18Circuit Diagram (PCB 3061-5880 Iss. 1)7.9 Decoder Board With EL Display (FLA) 0261-5879 Iss. 1 7-19/20Component Layout Side 1 Shts. 1 & 3(PCB 3061-5880 Iss. 1)7.10 Decoder Board With EL Display (FLA) 0261-5879 Iss. 1 7-21/22Component Layout Side 2 Sht. 2(PCB 3061-5880 Iss. 1)

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