Multitone FLA 872 Technical Manual
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Multitone FLA 872 Technical Manual

Radio paging receivers
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TECHNICAL MANUAL
for
RADIO PAGING RECEIVERS
MODEL TLA 852
and
MODEL FLA 872
>
Printed and Published in England
TM1205 Issue 2
Page (i)

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Summary of Contents for Multitone FLA 872

  • Page 1 TECHNICAL MANUAL RADIO PAGING RECEIVERS MODEL TLA 852 MODEL FLA 872 > Printed and Published in England TM1205 Issue 2 Page (i)

  • Page 2: Company Liability

    The information in this manual has been carefully compiled and checked for technical accuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line with the company policy of technical advancement, the information within this document may be changed.
  • Page 3 CONTENTS Page (i) Title Page Page (ii) Company Liability Page (iii) Contents Page (iv) Effective Page List Page (v) Safety Summary Warning Page (vi) Caution Section 1 Introduction and Specification Section 2 Operating Instructions Section 3 Technical Description Section 4 Installation &...
  • Page 4 TLA 852/FLA 872 EFFECTIVE PAGE LIST Page No. Issue Page No. Issue Page No. Issue Page No. Issue 5-25 5-26 (ii) 2-10 (iii) 2-11 (iv) 2-12 2-13 (vi) 2-14 2-15 2-16 5-10 5-11 5-12 5-13 7-3/4 5-14 7-5/6 5-15 7-7/8...

  • Page 5: Safety Summary

    SAFETY SUMMARY The following information applies to both operating and servicing personnel. General Warnings and Cautions will be found throughout the manual, where they apply, which refer to the applicable part of this summary. WARNING statements identify conditions or practices that could result in personal injury or loss of life.
  • Page 6 TLA 852/FLA 872 INTENTIONALLY BLANK Page (vi) TM1205 Issue 2...

  • Page 7: Table Of Contents

    TLA 852/FLA 872 SECTION 1 INTRODUCTION & SPECIFICATION CONTENTS: Page INTRODUCTION 1 - 2 FEATURES 1 - 3 SPECIFICATIONS 1 - 3 1.3.1 Receiver Performance 1 - 3 1.3.2 Power Supply 1 - 4 1.3.3 Code Format 1 - 4 1.3.4...

  • Page 8: Introduction

    The LCD of the TLA 852 can show a maximum of two lines of 20 alphanumeric characters; the FLA 872 has the option of showing a maximum of four lines of 20 characters, or two lines of double height characters. The displays can also show a maximum of seven symbols in a line.

  • Page 9: Features

    TLA 852/FLA 872 FEATURES The 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...

  • Page 10: Power Supply

    TLA 852/FLA 872 Sensitivity: The sensitivity figures quoted in Table 1 assume an ambient temperature in the range 18EC through 25EC. The battery voltage should be above the low battery trigger point of approximately 1.15 volts. At temperatures between the ambient and maximum / minimum, performance is at an intermediate value.

  • Page 11: Memory

    1.3.5 Displays, Controls and Alerts Liquid Crystal Display: TLA 852: Two lines of text. FLA 872: Four lines of text. Control Buttons: Three push-buttons (Select, Left and Right) on the front panel of the unit, control all the functions of the pager.

  • Page 12: Operational Environment

    TLA 852/FLA 872 1.3.6 Operational Environment The unit will operate to specification within these limits: Operating Temperature: -10EC through +55EC Storage Temperature: -20EC through +60EC NOTE: There may be some degradation of display performance below 0EC. 1.3.7 Physical Characteristics Dimensions:...
  • Page 13 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 - 11 2.2.13 Switching the Unit OFF...
  • Page 14 TLA 852/FLA 872 FIGURES: Page Controls and Display 2 - 3 Standby Screen 2 - 4 Option Screen Symbols 2 - 5 Opening the Battery Door 2 - 15 Lanyard Assembly 2 - 16 Page 2 - 2 TM1205 Issue 2...

  • Page 15: Controls And Indicators

    STRONG SUNLIGHT. CONTROLS AND INDICATORS Refer to Figure 2.1 for the identification and location of the controls and display associated with the TLA 852 and FLA 872. Note: In Germany, Style A (aerofoil) case is only for T Mobile use.

  • Page 16: Display

    The Liquid Crystal Display (LCD) in the TLA 852 shows two lines of characters. The FLA 872 shows four lines of characters (or two lines of double height characters) . Each line can have a maximum of 20 characters. Both units can also show a maximum of seven symbols in a line.

  • Page 17: Setting The Options

    ARCHIVE ALARM ALERT DISPLAY SET TIME MESSAGES TAG11264-1 FLA 872 Option Screen Figure 2.3: Option Screen Symbols Í Ì Push the or the button to choose the required symbol (the symbol flashes as it is chosen) then push the O> button to select the function.

  • Page 18: Archive

    TLA 852/FLA 872 2.2.4 Archive General The operator can use this option to archive received messages and also to view messages in the archive store. Archiving Messages Select the required message and view the complete message by pressing the Í...

  • Page 19: Alert

    TLA 852/FLA 872 When the alarm is set to ON and the alarm time is reached, the standby screen will show a flashing alarm symbol and the alert will operate for eight seconds. To stop the alert within the eight second period, push any button.

  • Page 20: Display Backlight (Tla 852)

    2.2.8 Display Options (FLA 872) Choose this option to show the display options screen. This shows two options : To change the height of the message characters ABC (refer to paragraph 2.2.9)

  • Page 21: Display Backlight (Fla 872)

    TLA 852/FLA 872 2.2.10 Display Backlight (FLA 872) O> Select the display option screen, then push the button to choose the backlight function. ¬ Use the buttons to select the backlight ON or OFF O> To return to the standby screen, push and hold the button for one second or wait for the unit to time-out.
  • Page 22 TLA 852/FLA 872 O> Push the button again and the tens of minutes number flashes. Set the ¬ required figure with the buttons. O> Push the button to make the minutes number flash. Set the required figure ¬ with the buttons.

  • Page 23: 2.2.12 Deleting Messages

    TLA 852/FLA 872 11:15pm 6:45am ¬ Push the buttons to select the required hour. O> iii) Push the button to select the next number (tens of minutes) then push ¬ buttons to select the required number. O> Push the button again to select the next number (minutes) then push ¬...

  • Page 24: 2.2.13 Switching The Unit Off

    TLA 852/FLA 872 Deleting All Stored Messages All the messages in the store memory (but not those in the archive memory) can be deleted in one operation. O> Push the button to show the seven option symbols. ¬ Use the buttons to choose the symbol.

  • Page 25: Receiving And Storing Messages

    TLA 852/FLA 872 RECEIVING AND STORING MESSAGES 2.3.1 Receiving a Message When the pager receives a new message the first part of the message shows on the display and the alert operates for eight seconds. Push any button to acknowledge receipt of the message and to stop the alert.

  • Page 26: Archiving Messages

    TLA 852/FLA 872 The unit memory can hold a maximum of 20 messages. When this number is reached the standby screen shows the memory full symbol. If a new message is received when the memory is full, the oldest message is deleted.

  • Page 27: Low Battery

    TLA 852/FLA 872 LOW BATTERY 2.4.1 Low Battery Warning When the battery needs replacing, the pager sounds an alert and the low battery symbol shows on the standby screen. 2.4.2 Replacing the Battery Refer to Figure 2.4. Use a thumbnail to press down on the battery door lock on the back of the unit.

  • Page 28: Lanyard Assembly

    TLA 852/FLA 872 LANYARD ASSEMBLY Figure 2.5 shows the method of assembling the lanyard to the unit. STAGE 2 STAGE 1 PULL THE LOOP THROUGH THE SLOT SQUEEZE THE LOOP TOGETHER AS FAR AS POSSIBLE AND PUSH IT INTO THE SLOT...
  • Page 29 3 - 9 3.3.8 Alerts 3 - 9 POWER SUPPLIES 3 - 9 FIGURES: TLA 852/FLA 872 Block Diagram 3 - 2 Receiver Block Diagram 3 - 4 Decoder Block Diagram 3 - 7 TM1205 Issue 2 Page 3 - 1...

  • Page 30: Circuit Summary

    TLA 852/FLA 872 CIRCUIT SUMMARY The TLA 852 and FLA 872 radio paging receivers each consist of two Printed Circuit Board (PCB) assemblies contained in a plastic case. The case is constructed in two main parts, the case front and the case back. A cover on the back of the unit provides access to the battery compartment.
  • Page 31 TLA 852/FLA 872 The RF signal enters the aerial and is fed to the dual conversion superheterodyne receiver. The signal is demodulated from RF to audio frequency digital form and is then fed to the decoder. This results in the received data activating the memory, display and the selected audible alert or vibrate alert.

  • Page 32: Dual Conversion Receiver

    TLA 852/FLA 872 DUAL CONVERSION RECEIVER TR404 TP403 AGC CONTROL (OPTIONAL) AE401 AE402 FL401 TR401, TR402 TR403 IMAGE RF AMPLIFIER FILTER MIXER CV404 21.4 MHz CV406 CV407 TR410 XL402 CV405 1st OSC. IC401 RSSI MIXER, IF AMP & DET. QUICK...
  • Page 33 TLA 852/FLA 872 The output from the RF amplifier passes through an image filter which provides these functions: Attenuation of signals outside the required band. Attenuation of the first image frequency. Matches the output impedance of the RF amplifier to the input impedance of the mixer stage.
  • Page 34 TLA 852/FLA 872 Due to the characteristics of filters FL401, FL402 and FL403, the signal at the input to the IF amplifier has amplitude modulation (AM). The AM must be removed before the signal reaches the detector stage. This is performed by the IF amplifier in IC401 which has very high gain and is designed to limit the amplitude of the signal to remove the AM component and give a ‘square’...

  • Page 35: Decoder

    TLA 852/FLA 872 DECODER SRAM EEPROM ADDRESS LIQUID RESET CRYSTAL DATA BUS DISPLAY RESET XL403 MODULE CONTROL LINES POCSAG MICRO- DECODER PROCESSOR PL401 IC402 RESET DATA FROM RECEIVER SK1 PL401 TP401 DRIVER TR415 AUDIBLE TR416 ALERT DRIVER !> BUTTON TR2 OR...

  • Page 36: Microprocessor

    TLA 852/FLA 872 Pin 9 (CLK0) provides clock pulses to operate the microprocessor while it is in standby 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.

  • Page 37: Display Illumination

    ON or OFF using the buttons on the front panel. The ‘Lamp ON/OFF’ signal, which comes from pin 8 of the microprocessor, controls transistor TR2 in the lamp circuit of the TLA852, or TR7/IC2 for the EL display in the FLA 872. 3.3.8...
  • Page 38 TLA 852/FLA 872 IC5 monitors the voltage of V and resets the decoder circuits if the voltage drops to a level that would cause data corruption. Transistor TR1, connected to pins 6 and 15 of IC3, detects the battery voltage. If BAT1 is removed, the drop in B+ causes transistor TR1 to switch OFF which sets the microprocessor to low-current mode.
  • Page 39 TLA 852/FLA 872 SECTION 4 INSTALLATION AND COMMISSIONING There are no installation and commissioning procedures for the Radio Paging Receiver Models TLA 852 and FLA 872. TM1205 Issue 2 Page 4 - 1...
  • Page 40 TLA 852/FLA 872 INTENTIONALLY BLANK Page 4 - 2 TM1205 Issue 2...
  • Page 41 TLA 852/FLA 872 SECTION 5 SERVICING CONTENTS: Page SERVICE POLICY 5 - 3 ROUTINE MAINTENANCE 5 - 3 WORKSHOP PROVISIONS 5 - 3 TEST EQUIPMENT, TOOLS AND ANCILLARIES 5 - 3 5.4.1 Test Equipment 5 - 3 5.4.2 Tools and Ancillaries...
  • Page 42 TLA 852/FLA 872 TABLES Page Radio Board DC Voltage Levels 5 - 14 Radio Board Test Points 5 - 14 Decoder Board DC Levels 5 - 15 Decoder Board Test Sequence 5 - 15 IC3 Microprocessor Pin Connections 5 - 19...

  • Page 43: Service Policy

    TLA 852/FLA 872 SERVICE POLICY Except for Routine Maintenance, repairs are only to be performed by qualified personnel in authorised workshops. The unit can be repaired to component level. The display module is a disposable item. If any screening cans are removed for access to components, they must be refitted flush to the printed circuit board.

  • Page 44: Tools And Ancillaries

    TLA 852/FLA 872 5.4.2 Tools and Ancillaries The following tools and ancillaries are required: DC Power Supply, 1-1.5 volts. Cross-point Screwdriver Surface Mount Handling Tools Anti-static Workstation DISASSEMBLY 5.5.1 Case Removal Refer to Figure 5.1. Use a thumbnail to press down on the battery door lock on the back of the unit.

  • Page 45: Board Assembly Removal

    TLA 852/FLA 872 APPLY PRESSURE WITH FINGERS TO SIDES OF CASE > LIFT FRONT EDGE OF CASE FRONT UNTIL REAR CATCHES DISENGAGE TAG11213-1 Figure 5.2: Case Front Removal Remove the Case Back by applying pressure to the sides of the case, as shown in Figure 5.2, and lifting the front edge of the Case Front until the rear catches...

  • Page 46: Lcd Module Removal

    TLA 852/FLA 872 5.5.4 LCD Module Removal 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)). Release the two module pins from the holes in the Decoder Board and carefully fold the module away from the board to get access to the flexible cable.

  • Page 47: Assembly

    TLA 852/FLA 872 ASSEMBLY TAG11214-1 Case Front Assembly Battery Door LED Display Case Fixing Screw Decoder Board Assembly Battery Negative Contact Radio Board Assembly Rubber Mat Case Back Assembly Moulding Bezel LCD Battery Positive Contact Display Gasket Case Fixing Screw Figure 5.3: Exploded View of Unit...

  • Page 48: Lcd Module Installation

    TLA 852/FLA 872 5.6.3 LCD Module Installation Use the Anti-static Workstation and the correct soldering tools to connect the flexible cable to the Decoder Board. Carefully fold the flexible cable and install the two pins on the rear of the module in the holes on the Decoder Board.

  • Page 49: Fault Finding

    TLA 852/FLA 872 FAULT FINDING 5.7.1 General Refer to the Fault Finding Guide (Figures 5.5 through 5.7) and the information given in Tables 5.1 through 5.8 and Figures 5.8 through 5.10 to help resolve problems. Alignment information is in paragraph 5.8. Programming information is given in paragraph 5.9.

  • Page 50: Battery Low Circuit Test

    TLA 852/FLA 872 PL401 38.4kHz RESET AREA ATTN LOWBAT BEEP TAG11336-1 Figure 5.4: Connections between Radio Board and Decoder Board 5.7.4 Battery-Low Circuit Test To check the Battery-Low circuit: Connect the variable DC power supply to the unit and set the output to 0.9 volts.
  • Page 51 TLA 852/FLA 872 PAGER SUSPECT FIT A NEW BATTERY AND SWITCH ON. IS THE ‘SWITCH ON’ MESSAGE SEQUENCE? BLANK CORRUPTED IS DISPLAY BLANK OR CORRUPTED? CORRUPTED EEPROM. RE-PROGRAM. RE-TEST. IS BEEP AUDIBLE AT SWITCH-ON? DE-CASE AND CHECK DISPLAY MODULE, V INTERCONNECTIONS.
  • Page 52 TLA 852/FLA 872 ‘B’ PLACE THE UNIT IN THE P671. SEND A CALL. IS THE CALL RECEIVED? >3dBm ‘B’ CHECK O.K. SENSITIVITY. DE-CASE. PLACE IN P671. CHECK 1V LINE. IS LEVEL 1V ±50mV? REALIGN AND RECEIVER RE-TEST O.K. SEND PRE-AMBLE.
  • Page 53 TLA 852/FLA 872 ‘C’ IS 455kHz PRESENT ON TP405? FL402 OR C444 FAULTY. IS 2nd LOCAL OSC. O/P (IC401, PINS 1 AND 2) >200mV? CHECK XL401 SHORT JUNCTION OF C407/R446 TO 0V. IS IC401, PIN 24 >3mV? CHECK IC401 IS TR403 (1st MIXER O/P) >3mV?
  • Page 54 TLA 852/FLA 872 Table 5.1: Radio Board DC Voltage Levels COMPONENT COLLECTOR BASE EMITTER COMMENTS TR401 0.29 0.73 RF Amplifier TR402 0.87 1.02 0.29 RF Amplifier TR403 0.845 0.678 First Mixer TR404 0.733 0.015 AGC Switch TR406 1.018 0.791 1V Series Regulator TR410 0.95...
  • Page 55 TLA 852/FLA 872 Table 5.3: Decoder Board DC Levels DEVICE COLLECTOR BASE EMITTER REMARKS 3.00 3.00 Battery Disconnect Monitor 3.00 Backlight Driver Vibrate Enable Vibrate Motor Drive 0.19dc 2.2 V p-p 4ms wide 4.19MHz R1/C4 3.00 1.49dc 3.0V p-p CLKO 38.4kHz IC402 pin9 1.49dc...
  • Page 56 TLA 852/FLA 872 VOLTS 2.2V 0.19V TIME WAVEFORM AT C5 VOLTS 4.19MHz WITHIN THE ENVELOPE TIME WAVEFORM AT R1/C4 WAVEFORM AT R1/C4 3V p-p 38kHz VOLTS 1.49V TIME WAVEFORM AT R35 AND IC402, PIN9 TAG11333-1 Figure 5.8: Decoder Board Waveforms...
  • Page 57 TLA 852/FLA 872 VOLTS VOLTS 3V p-p 3V p-p TIME TIME 1.6ms 1.6ms WAVEFORM AT PIN 38 WAVEFORM AT PIN 39 VOLTS VOLTS 6V p-p 6V p-p TIME TIME 1.6ms 1.6ms WAVEFORM AT PIN 40 WAVEFORM AT PIN 41 VOLTS TIME 1.6ms...
  • Page 58 TLA 852/FLA 872 µP TR2, 4 TR401, 402, 403, 406 407, 410, 414 3 (C) 1 (B) 2 (E) TR1, 3, 415 (28) SONY (Rear of (NEC CONFIGURATION ) Module) (IS SHOWN IN PARENTHESIS) (14) (15) ATTN TEST SIGNAL IC402...
  • Page 59 TLA 852/FLA 872 Table 5.5: IC3 Microprocessor Pin Connections Pin Number Pin Name Description PGM - programming input BEEP - output signal ROM-CE - CGROM (IC2) chip enable RAM-CE - SRAM (IC4) chip enable LCD-CS - Display chip select µP (IC3) low current mode switch...
  • Page 60 TLA 852/FLA 872 Table 5.6: IC4 RAM Pin Connections Pin Number Pin Name Description Address line AD14 Address line AD12 Address line AD07 Address line AD06 Address line AD05 Address line AD04 Address line AD03 Address line AD02 Address line AD01...
  • Page 61 TLA 852/FLA 872 Table 5.7: LCD Display Pin Connections Pin Number Pin Name Description Not Connected V5-V1 LCD driver supply voltages RESET Reset - input signal LCD-CS - chip select Ground AD16 - display address input signal WR - LCD write enable input signal...

  • Page 62: Radio Alignment Procedure

    TLA 852/FLA 872 RADIO ALIGNMENT PROCEDURE 5.8.1 Preparation Remove the Board Assembly from the Case (see paragraph 5.5.2). Install a 0 ohm resistor or a shorting link in the position for R456, to disable the BEC. Disable the AGC circuit by connecting TP403 to 0 volts. Alternatively, lift R409.
  • Page 63 TLA 852/FLA 872 Put a known good battery in the unit (but leave the battery door off). Put the unit in the P671A jig, fold the jig arm over the unit and lock the arm in position. Connect the SINAD meter to the alignment pins on the P671A (refer to Figure 5.12)

  • Page 64: Pager Sensitivity Measurement (Coarse)

    TLA 852/FLA 872 5.8.3 Pager Sensitivity Measurement (Coarse) To determine the pager sensitivity, configure the test equipment as shown in Figure 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 unit under test being in a noise free environment.
  • Page 65 TLA 852/FLA 872 20mm 60mm 20mm 52mm 14mm 80mm ø 20mm TAG11124-1 Figure 5.14: Polystyrene Block for TEM Cell Test - Dimensions TM1205 Issue 2 Page 5 - 25...

  • Page 66: Programming

    TLA 852/FLA 872 PROGRAMMING 5.9.1 General The pager contains an EEPROM which holds unique data. The data may be altered as shown in the following paragraphs. 5.9.2 Equipment The following equipment is required: P671A Alignment Jig P669H Programming Software Programming Cable IBM PC or equivalent 5.9.3...
  • Page 67 TLA 852/FLA 872 SECTION 6 SPARE PARTS LIST CONTENTS: Page ASSEMBLIES 6 - 1 6.1.1 Modules 6 - 1 6.1.2 Case Parts 6 - 1 6.1.3 Batteries 6 - 2 6.1.4 Battery Packs 6 - 2 RADIO BOARD COMPONENTS 6 - 3 6.2.1...
  • Page 68 0961-5828 WINDOW, FLAIR 0961-5639 WINDOW, OMPT MOROCCO 0961-5529 WINDOW, SYSTEL 0961-5764 WINDOW, ENERGONET, TLA 852 0961-5611 WINDOW, ENERGONET, FLA 872 0961-5794 CASE BACK MOULDING, BLACK 0801-0150 CASE BACK MOULDING, BLUE 0801-0145 BATTERY DOOR MOULDING, BLACK 0801-0160 BATTERY DOOR MOULDING, BLUE...
  • Page 69 TLA 852/FLA 872 ITEM/CIRCUIT DESCRIPTION PART No. REFERENCE 6.2.3 Miscellaneous BATTERY CONTACT +VE 7361-4862 BATTERY CONTACT -VE SPRING 7361-4861 LANYARD (ELASTICATED) 7961-5055 GASKET, DISPLAY SEAL 2561-5007 SPACER MOULDING RUBBER VHF 0861-5209 SCREW 2.2mm x 6mm PAN HEAD, S/TAP 8216-2296 RADIO BOARD COMPONENTS 6.3.1...
  • Page 70 TLA 852/FLA 872 DESCRIPTION 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...
  • Page 71 TLA 852/FLA 872 DESCRIPTION PART No. REFERENCE 6.3.5 Resistors R5, 8, 472-478 CHIP 0S 62m5W 3115-0001 R401,403,439,470 CHIP 100S ±5% 62m5W 3115-0050 R402,405 CHIP 18k ±5% 62m5w 3115-0104 R404,438 CHIP 680S ±5% 62m5W 3115-0070 R406 CHIP 1k ±5% 62m5W 3115-0074 R408 CHIP 330S ±5% 62m5W...
  • Page 72 TLA 852/FLA 872 DECODER BOARD COMPONENTS 6.4.1 Capacitors C3,6,8,10,14,19,20-25 CHIP 100n ±10% 16V 3332-0014 C4,5 CHIP 27p ±5% 50v 3326-0020 C9,11 CHIP 1n ±10% 50V 3327-0013 C12,15 CHIP 47µ ±20% 6V3 3412-0110 CHIP 100p ±5% 50v 3326-0027 C17,18,26 CHIP 1µ -20/+80% 16V...
  • Page 73 TLA 852/FLA 872 6.4.4 Banded Component: IC3 TLA 852 FLA 872 STANDARD (LATIN) 0501-0224 0501-0211 (OTP) 3835-0017 (MASKED) STANDARD (CYRILLIC) 3835-0012 0501-0212 (OTP) 3835-0018 (MASKED) "ZAP!" (MASKED) 3835-0020 Z-PAGE 0501-0228 MOROCCO 0501-0198 (OTP) 3835-0010 (MASKED) ITEM/CIRCUIT DESCRIPTION PART No. REFERENCE 6.4.5...
  • Page 74 TLA 852/FLA 872 INTENTIONALLY BLANK Page 6 - 8 TM1205 Issue 2...
  • Page 75 TLA 852/FLA 872 SECTION 7 DIAGRAMS CONTENTS Source Drawing Page 7.1 Radio Board (PCB 3061-5374 Iss. 1) 2961-5375 Iss. 5 7-3/4 Circuit Diagram (Sheet 1 of 2) (Sheet 2) 7.2 Radio Board (PCB 3061-5374 Iss. 1) 2961-5375 Iss. 5 7-5/6...
  • Page 76 TLA 852/FLA 872 INTENTIONALLY BLANK Page 7 - 2 TM 1205 Issue 2...

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