PYE OLYMPIC M201 Page 1 Service Manual Download

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Summary of Contents for OLYMPIC M201

Page 1: ...Service Manual Pye Telecommunications Ltd OLYMPIC Mobile Radiotelephone Type M201 Publication Ref No TP169 ...

Page 2: ... or domestic waste This Service Manual is for the maintenance of Pye Telecommunications equipment The performance figures quoted are typical and are subject to normal manufacturing and service tolerances The right is reserved to alter the equipment described in this manual in the light of future technical development OLYMPIC VHF AM MOBILE RADIOTELEPHONE TYPE M201 ISSUE 2 SERVICE MANUAL MAY 1978 PY...

Page 3: ... entry to this effect will be recorded on the amendment list below Each page affected by amendment action will bear the amendment number as a suffix to the manual reference number eg TP123 4 indicates that the page has been corrected by amendment number 4 Should it be necessary to raise the issue of a manual the amendment numbering will recommence with No 1 Amend t No Date Initials Remarks ERRORS ...

Page 4: ...ching 3 3 Receiver RF Unit 1 3 4 Receiver Oscillator 8 3 6 Receiver Multiplier 5 3 6 10 7 MHz Crystal Filter 3 6 IF Amplifier Detector and AGC Module 2 3 7 Noise Limiter High and Low pass Filter 3 3 8 Squelch IF and Delayed AGC Module 6 3 8 AF Amplifier Module 4 3 10 Noise Squelch Module 7 3 10 Low Power Transmitter Audio Module 9 3 11 High Power Transmitter Modulator Module 17 3 12 Transmitter Os...

Page 5: ...ion 5 1 Ordering of Spare Parts 5 1 Abbreviations 5 1 Miscellaneous Items 5 2 Installation Items 5 2 Main Unit 5 3 RF Unit 1 5 4 IF Amplifier Detector and AGC Module 2 5 7 Noise Limiter High and Low pass Filter Module 3 5 8 AF Amplifier Module 4 5 9 Receiver Multiplier Module 5 5 9 Squelch IF and Delayed AGC Module 6 5 10 Noise Squelch Module 7 5 11 Oscillator Module 8 5 11 Low Power Tx Audio Modu...

Page 6: ...ock Diagram Power Supply Block Diagram Main Unit Interior View Diode Probe Circuit Diagram Test Extension Assemblies Kit Audio Test Lead Main Unit Exploded View Front and Rear Views of Equipment Control Module Component Location Diagram Motherboard AT27893 Complete Component Location Diagram Motherboard Receiver Module Locations M201 Receiver Circuit Motherboard Transmitter Module Locations M201 T...

Page 7: ...an operating frequencies 30 C to 60 C ambient Standard 1OPPM over the temperature range 10 C to 55 C Alternative stabilities are available to meet climatic and mandatory requirements 12V nominal DC supply positive or negative ground 24V operation available using separate regulator unit VR200 Receive standby 250mA approx Transmit 3A approx OFF ON Switch SQUELCH VOLUME CHANNEL Selector 1 to 6 and 1 ...

Page 8: ...y noise compensated Threshold sensitivity equal to or less than 0 4uV PD with full 6 db range of adjustment above threshold level Automatic Gain Control The output does not increase by more than 6 db when the input is increased from 0 511V to 0 5V PD Transmitter Output Impedance Power Output Spurious Outputs Modulation Response 50P 6W min A C and M Bands 8W min E Band at 13 8V DC input 25W with se...

Page 9: ... filter The transmitter generates a modulated carrier of between 6 watts and 8 watts depending on frequency into a 50Q load An add on RF amplifier A200 is available which increases the output to 25W The receiver delivers 2 5 watts audio power with less than 10 distortion into a 352 load The power supply is 12V DC nominal but a 24 12V regulator VR200 is available for use with 24V DC systems The equ...

Page 10: ...t will vary according to the role in which it is used The complement of sub assemblies for any particular equipment is indicated by a code number shown on the Equipment Label together with the catalogue and serial numbers attached to the main unit frame assembly A typical equipment number is given below M 201 01 0 0 1 S AO AO 6 00 00 I Catalogue Installation Not Function Tx No of Secondary Number ...

Page 11: ...dard function no options fitted Blank panel fitted M Pyecall module MS1 or TL1 fitted To be ordered separately Channel Spacing S 12 5 kHz channel spacing V 25 kHz channel spacing Transmitter Frequency Band AO 148 174 MHz CO 117 137 MHz EO 68 88 MHz M1 105 108 MHz Receiver Frequency Band AO 148 174 MHz CO 117 137 MHz E0 68 88 MHz M2 138 141 MHz P8 96 106 MHz Number of Channels 1 Single Channel fitt...

Page 12: ...c Receiver Modules 1 RF Unit 5 Receiver Multiplier Module 2 IF Amplifier Detector and AGC module 6 Squelch IF and Delayed AGC module 7 Noise Squelch Module 3 Noise Limiter and High and Low pass Filter Module 4 AF Amplifier Module Transmitter Modules 10 Transmitter Multiplier Module 9 Low Power Transmitter Audio Module 17 High power Transmitter Modulator 11 PA module Shared Modules 13 Antenna Filte...

Page 13: ...Generator Audio Output meter and RF Output meter see Section 4 Test Equipment check equipment serviceability as follows 1 Connect Audio output meter set to 3Q impedance across loudspeaker terminals and connect Signal Generator to antenna socket 2 Adjust Signal Generator to the Receiver operating frequency and inject 1 mV PD modulated 30 at 1 kHz 3 Carry out Operating Instructions TP919 for RECEIVE...

Page 14: ...Description Main Unit M201 Loudspeaker Assembly Fist Mic and lead assembly Microphone Rest assembly Slot pan S T scr st No 10 x 1 2 Slot pan S T scr st No 6 x 3 8 Pan pozi scr S T No 6 x 1 Pan pozi scr S T No 6 x 3 4 Cradle Assembly Terminal Block 2 way Fuseholder Fuse 5A Coaxial plug BNC Module extractor Equipment extractor tool Cable clamp Support Antenna and lead Part No Remarks AT05294 AT10877...

Page 15: ...t the new holes are fitted with rubber grommets Refer to Basic Installation Diagram Fig 2 5 throughout this procedure Procedure 1 Check package against Contents List 2 Determine location of installation see typical installation layout shown When finalising the locations of the above items the length of the following cables should be noted Microphone Lead Assembly a Contracted 86cm 34 in b Extended...

Page 16: ...SOLDER HERE CONNECTOR BODY CENTRE PIN 4 Install Cradle Assembly locating spring to front Loudspeaker Rest and Strain Relief Clamp See Contents List for Fixing Screws 5 Mount Antenna See Antenna Fixing Instructions for fitting details Connect feeder plug as shown For best all round performance of the radiotelephone the antenna should be mounted on the centre of vehicle roof Fig 2 1 Typical Installa...

Page 17: ...nect M201 Power Leads to Connect Block 0 d Plug in Fist Mic or Handset and Loudspeaker 0 e Remove Protection Cover on Antenna Socket and plug in Antenna Feeder 0 Air Check Carry out a test call and check that the equipment is correctly netted in to the base station 24V Supply Regulator VR200 13 required 1 Connect 24V supply to VR200 input fusing both leads at 5A 2 Connect VR200 12V output to termi...

Page 18: ...s contained in a weatherproof diecasting which should if possible be mounted in a clean dry location 1 Site the amplifier on the route of the antenna feeder Fix the mounting plate and secure amplifier to it with SKB N type socket nearest the antenna 2 Cut the antenna feeder to suit the amplifier location Terminate the free end of the coaxial cable still attached to the antenna with the N type plug...

Page 19: ...w permanently connected and the amplifier is switched by the presence of an RF signal Should power switching from the Radiotelephone OFF ON switch be required proceed as follows i Disconnect the battery supply from terminal block Connect the switched negative to terminal block 0 ii Make a connection between this lead and the yellow green core of the A200 cable at terminal block iii Remove the top ...

Page 20: ...ain Unit 7 Microphone and Lead Assy 2 Antenna and Feeder Cable Includes Strain Relief Clamp 3 Loudspeaker Assy 8 Microphone Rest 4 2 Way Connector Block 9 Cradle Assy 5 Fuse Box 10 Cradle Extractor 6 Vehicle Battery 11 Blanking Plate or Facility Module 12 Loudspeaker Lead Fig 2 5 Basic Installation ...

Page 21: ...hich is also supplied can be used as an alternative to discourage the unauthorised removal in areas where vandalism is prevalent IDENTIFICATION Except for the standard fixed parallel rod type GX100 suffix letters are used to identify the items included in the make up of the antennas The suffices are read from the top of the antenna downwards e g GX100TS is a tapered rod with a spring The following...

Page 22: ... using the standard base the antenna can be fitted from the outside of the vehicle First select the optimum location on the vehicle and drill a 16mm 5 8 in diameter hole Pass the end of the feeder cable through the hole NOTE the feeder cable is fitted to the base at the factory Should it prove necessary to change the cable at any time the method of assembly is overleaf Remove the cover nut from th...

Page 23: ...illary Items LEGEND 13 3 way terminal block supplied with M201 14 3 way terminal block supplied with VR2001 15 Fuse box 16 A200 RF Amplifier 17 VR200 24 12V Convertor 18 Three way terminal block supplied with A200 ...

Page 24: ... ground plane is required for optimum efficiency This ground plane should consist of strips of aluminium alloy or similar conducting material fitted to the inside surface at the selected antenna site and should be as near to x 2 diameter as possible Drill a 12 7 mm 0 5 in hole through the structure Remove the locking nut earthing bracket and contact plate from the anchor bush and slide them off th...

Page 25: ...Indicator Lamps There are two indicator lamps as follows a TRANSMIT A red lamp which lights when the press to talk switch on the fist micro phone is operated b ON A lamp which lights when the power supply is connected This lamp illuminates a green lens and also the channel and volume control windows Pyecall Modules Operating Instructions for Pyecall Modules are given in Pye Technical Publication T...

Page 26: ...hone one or two inches from the lips speak clearly across its face in a normal conversational tone d Use correct operating procedure and keep transmissions short Release press to talk switch as soon as the message is finished Note that the red lamp is extinguished Switching Off To switch off the set press the OFF ON switch upwards once and check that the green lamp is extinguished and that the sym...

Page 27: ...l employing FET s Mixed coupling between stages maintains a substantially constant bandwidth and gain The output of the selected oscillator Module 8 is frequency multiplied and amplified in the two stage RX Multiplier 5 before injection into the Mixer sub module to produce the 10 7 MHz IF signal After filtering by the 10 7 MHz Crystal Filter the signal is applied to the IF Amp Module 2 at the inpu...

Page 28: ... fed to the Schmitt trigger TR5 TR6 If the RF signal at the antenna is very weak or non existent the DC signal level will be high and the Schmitt trigger will disable the AF module via 7D3 Under all other circumstances the DC signal level will be too low for 7TR5 part of Schmitt trigger to conduct and the receiver will operate normally TR7 and TR8 provide a high impedance output for an external fa...

Page 29: ...d M Bands or 8W E Band into a 5052 load The output of the High Power Modulator 17 is fed back to operate the compression circuitry in Module 9 The compression level is pre set by 9 RV2 Other pre set controls are 9RV1 mic sensitivity and 9RV3 Output Power To correct any modulation distortion 11 D2 and associated circuitry in the PA final stage samples the output and feeds back any audio correction ...

Page 30: ...C6 couples this received signal to the source of the RF amplifier lATR2 via pin 3 of the 1st RF amplifier sub module AGC is applied to 1ATR2 via the NPN input stage lATR1 and Li The amplified drain output of 1ATR2 at pin 1 is mutually coupled via L2 L3 to pin 2 of the 2nd RF amplifier sub module 1B and hence to gate G1 of the dual gate MOSFET 1BTR1 AGC is applied to gate G2 and the amplified drain...

Page 31: ... RI I5K T 1n 7 7 TRI SPF341 2 GI c2 CI TRI IC4 1n In MSPF341 1 10n GI 4n7 4K7 C2 121 CI In 11 IK2 R2 TRI 1 LI 2N4286 OOI I T In R31 C3 3 0 CO In TR2 T1588A Cl 4K7 R3 R4 C5 1nT 100n 12K IK8 68 R3 R4 10n 7 1 1 10K 20 04 R F UNIT 10 0 30 12 1a COMPONENT SIDE 8 0 60 41R2 I C3 t Cl c5 30 MOD AT 1kHz A OJAI B 0 5 1V C 0 5mV 9 0 10 0 5 3 0 C2 0 0 0 4 2 Q 0 101 110 120 13 0 14 0 01 1 UNDERSIDE L1 C6 L ...

Page 32: ...ing channels according to the module fitted Channel selection is made by the Channel switch not fitted to single channel equipments which selects the appropriate crystal operating in the series mode at the 3rd overtone The exact frequency of operation can be adjusted by the crystal trimmer appropriate to the crystal selected See also Netting Procedure NOTE The Receiver and Transmitter Oscillator M...

Page 33: ... necessary only to change the filter IF Amplifier Detector and AGC Module 2 This vertical plug in module features a sub module two integrated circuits both IF amplifiers IC2 and IC3 together with a crystal filter FL1 The filtered 10 7 MHz signal is connected to the IF input sub module which has a field effect transistor amplifier controlled by the delayed AGC line The amplified output is fed via C...

Page 34: ...d via the volume control to the AF Amplifier Module 4 A low level unfiltered audio signal is made available for use with an optional facility module via the FETTR1 Squelch IF and Delayed AGC Module 6 This vertical plug in module consists of a complex integrated circuit ICI with a discrete quadrature network and a discrete DC amplifier TR1 TR2 The 10 7 MHz signal derived from Module 2 is passed via...

Page 35: ...o reduce the gain of the RF and IF sub modules in Modules 1 and 2 Under conditions of high temperature and low signal level the action of thermistor TH1 tends to increase the AGC voltage thus offsetting loss of gain in the RF Module 1 L2 5 L3 C7 R3 4K7 t 1 4 7 C5 C6 1 VE In 1n7 R8 C11 1K VE TR2 PCB108 Cl RI 0 1H 4n7 100 R2 5 0 11 1 10 11 C l 3 2 4 14 5 15 C 1 C3 74n7 R6 1K TRI 2N5447 RS R7 10K 1K ...

Page 36: ... M2 5 x 6mm Pozidriv screws Noise Squelch Module 7 TPI C3 4n7 YE _T217 C5 VE D2 IOn 106 G R I CIO 4n VE R19 O RIB 100 o t C11 2K2 T33 R22 2K2 YE D3 3 S R8 100 R9 3K3 810 820K R13 O 100 RI4 fl t2K RI5 22K TR6 PBC 0 6E3 R20 CI3 R28 2K2 01 GR TR3 TR4 PBC108 PBC1088 C4 11 10n C7 C8 lOn T 470n 3K3 TR5 PBC1069 3K3 TR7 R24 MPSA13 27K _D5 LIS TRB PBC108 TR2 N5447 TRI PBC108 R4 150K R16 22K R17 470 C1 C2 I...

Page 37: ...at the Control 14 The high potential at TR6 opens the squelch gating diode D3 which in turn is applied to the base of the squelch switch transistor in Module 4 A second path from TR6 collector is via the Darlington transistor TR7 and also TR8 which provides the means of driving a Busy indicator at a facility module Low Power Transmitter Audio Module 9 This is a vertical plug in module featuring th...

Page 38: ...he PA Module 11 to modulate carrier and back to the Low Power Tx AF Module 9 to operate the compressor The emitter follower TR1 is supplied from the 10V regulated supply TR2 and TR3 are connected to the 14V supply Transmitter Oscillator Part of Receiver and Transmitter Oscillator Module The transmitter oscillator can provide one six or twelve channels according to the module fitted Channel selecti...

Page 39: ... C13 TR30 Ch TR29 C4 lin 1 L5 I 4 T C2 C14 TP2 TR1 TP1 oO C15 C7 I 0 j L L L2 j 0I C9 I I C31 0 L 1 Ll rj 011 t L L4 j r L r 7 L3 Llr J C12I 1 rJ L L_ _J This is a vertical plug in module providing one multiplier stage followed by two stages of amplification A harmonic of the oscillator output is selected at the multiplier stage TR1 and after two stages of amplification TR2 and TR3 the signal now ...

Page 40: ...55p7 T I C17 2n2 VE TR3 fi i79 00 L10 7 5 55 p7 C22 C19 2n2 2n7 R8 VE C23 L11 C25 2n2 99 1K 2n2 j C5_1_ C6 100n El 2n2 L3 2117 R2 _L C28 Z C4 2 18p L2 TP1 C6 r e 7c 9 2 K_C8J C70 L4 11 C24 Gj is 8 9 1 C25 C20 0 OC16 C18 4 R5 I 015 PA Module 11 This is a vertical plug in module provided with a heavy duty heatsink which is secured to the main frame by two M4 x M25mm Pozidriv screws Two Class C stage...

Page 41: ...2N3866 C8 L4 Isly 2 18p TP3 010 op L5 913 R4 22 470 C28 2n2 I 5 60p 7 914 1K Z C4 5 60p L2 R11 39 1K R1 TP2 2 18p 22 00 C19 I I R8 2 n 2 2117 T C 20 100n VE C23 47p 014 _L 015 5 55p 1 T 27P TP4 TR3 554BLY 68p C21 5 60 p 72 L11 C 22 5 60p C24 C26 RIO 100p C25 2n2 R9 3K9 D2 11 RI2 g 82K C27 8 2n2 j IF 9 1 I 5 55p Th 10 5 2 P A MODULE TP1 O 14c 61 TP2 O T P4 0028 C14 ONVO Op 05 L7 026 E 5C 75 271 6 1...

Page 42: ... module provides the means of changing the equipment from the receive to the transmit condition The module consists of a changeover relay R LS 2 and associated components In the receive condition the relay is de energised and contact group S1 connects the 10V power supply to the receiver contact group S2 connects the antenna via the antenna filter to the RF Module 1 input stage Operating the press...

Page 43: ...hes off TR1 to protect the module When the short circuit is lifted the module resumes normal operation The select on test resistor R5 varies in value between 39052 and 15052 A table of values required for specific conditions is shown on the overall circuit diagram The module is secured to formed pedestals on the main unit frame wall by two M3 x 25mm Pozidriv screws Receiver and Transmitter Oscilla...

Page 44: ... and the transmitter channel components occupy the rear half the receiver and transmitter oscillator cards are positioned centrally on the appropriate sector of the board to connect the selected components into the oscillator circuit Component Coding See Coding Table Trimming Inductive receiver trimmers L1 to L12 transmitter trimmers L13 to L24 See also Netting Procedure Section 2 Switching In the...

Page 45: ... 8 11 10 9 8 7 6 5 4 CHANNELS 4 6 REPEATED AS ABOVE XL16 18 R16 18 L16 18 C6 7 CHANNELS 4 12 REPEATED AS ABOVE XL16 24 816 24 L16 24 C6 9 6 _ _ 6 7 8 3 c 2 Ve02 RI R4 R4 SW 467 C4 1 4n7T TR1 BF152 470 Ve 4 Ve T 2 SW 46I C4 4n7T v I 100 SWITCHED RX OSC AT27690I R2 XL1 R2 TR1 470 BF152 CI RI 680 CI Ve 1C2 I In In R3 SW 820 R3 SW 820 SB REAR VIEW 05 R5 C3 RE C3 LI Ii 10 Ve II L1 4K7 4n7 4K7 6 o 16 1 ...

Page 46: ...be used When active components mounted on heatsinks are replaced a heatsink compound such as R S Components Ltd Cat No 553 311 must be applied between the component insulating washers and the heatsink surface to ensure a good thermal path Soldering Keep soldering operations to a minimum Ensure that equipment is switched off before soldering Clean printed circuit tracks before applying solder or so...

Page 47: ... to prove the serviceability or otherwise of the IC before replacing it It is essential that these checks are carried out as otherwise the original cause of the failure could be still present and destroy the replacement item Antenna Loading The equipment will operate safely under a wide range of loading conditions However the transmitter should not be operated in the absence of a suitable load suc...

Page 48: ...nd circuitry Where necessary test points are provided on the upper edges of the daughter board concerned To provide maximum heat dissipation the Transmitter P A and the Receiver AF heatsinks are bolted to pedestals formed on the frame walls the High Power Modulator and 10V Regulator modules are bolted to the frame Fig 4 1 Main Unit Interior View EQUIPMENT ACCESS CAUTION Pozidriv screws are used in...

Page 49: ...4 4 ...

Page 50: ...the top cover CAUTION 2 A poor thermal bond between the high current modules and the frame can cause very serious damage Module Replacement When replacing modules or thick film circuits which are bolted to the main frame ensure the mating surfaces of the frame pedestals and the modules are thoroughly clean and are lightly coated with thermal grease Before securing a module to the frame check that ...

Page 51: ...or Kingshill 18V10 RF Output Meter Multimeter Electronic Voltmeter EVM 10 7 MHz Marker Oscillator Audio Output Meter Signal Generator Diode probe Frequency Counter Audio Generator Modulation Meter Oscilloscope Set of Trimming Tools T Attenuator Module Extractor 47E2 Resistor Test Extension Assemblies Kit 5052 50W 68 174 MHz 20 00052 volt 50mV to 3V at 200 MHz Input capacitance 1 5pF 3 30E2 3W FSD ...

Page 52: ...er audio path will be interrupted and in order to restore the path again it is necessary to carry out one of the following operations as appropriate If the equipment is not provided with an external Facility Socket SKD link Mother Board pins 12 and 17 If the equipment is provided with an external Facility Socket SKD insert Blank Module in the internal facility compartment and link SKD pins 7 and 8...

Page 53: ...e given on the layout diagrams of the relevant individual modules Identification of Modules and Components All modules are alloted a prefix number which is used to identify its coded components e g 3TP1 is TP1 of Noise Limiter Module 3 Signal Generator Levels All signal levels are expressed in terms of PD Multinneter Unless otherwise stated the multi meter negative lead should be connected to the ...

Page 54: ...e of Mother board should be 3 mm above the tops of their former those of Modules 2 5 and 6 should be flush with their formers f Set signal generator to the channel frequency modulated at 30 at 1 kHz switch off and connect to antenna socket g Connect AF output meter across loudspeaker Set to 30S2 impedance h Set the equipment OFF ON switch to ON up check that front panel is illuminated j Check that...

Page 55: ...Fig 4 3 Test Extension Assemblies Kit ...

Page 56: ...ation obtain zero beat using 10 7 MHz marker oscillator 2TP1 Adjust sig gen level for reading of 0 5V approx 2 Ti 2TP1 Tune downwards for max 2nd tuning point Adjust sig gen for signal level of 0 4uV PD Obtain zero beat Turn SQUELCH control fully anticlockwise 2 RV1 2TP1 Adjust for 1V Adjust sig gen for signal level for 0 51A PD unmodulated Obtain zero beat 6 L2 7TP1 Tune downwards for min 1st tun...

Page 57: ...ume control for poweter meter reading of 50mW Switch off modulation and check that reading falls by at least 10db Set signal generator level to 50uV PD modulated 30 at 1 kHz Adjust VOLUME control for power meter reading of 100mW Switch off modulation and check that the reading falls by at least 30db Squelch a Threshold Check that the unmodulated signal generator output level at which the SQUELCH c...

Page 58: ...r Multimeter Unless otherwise stated the multimeter negative lead should be connected to the negative supply at TP1 of the Noise Limiter module 3 Connect positive lead to Test Point indicated in the alignment chart Preliminary Checks and Adjustments Transmitter See CAUTION 3 in this section a With the OFF ON switch 14SA in the ON position check that the resistance between positive and ground and n...

Page 59: ... and fit to Mother Board parking pins Module Replacement C22 C24 Power meter 9 9RV3 11TP1 10V 11 C2 C4 Power C8 C10 Meter C12 C14 C22 C24 L1 L2 L3 L4 D Remove test resistor Refit PA Module see E 9 9RV3 11TP1 tF 11 C2 C4 11TP2 C8 C10 11TP3 C12 C14 11TP4 9 9RV3 Power Adjust for reading Meter 6 5W A C M Bands 8 0W E Band 11 11TP1 10V Check reading 5 5V or less Tune one trimmer with respect to the oth...

Page 60: ...RF unmodulated output power is not less than 3W 2 Reduce power supply voltage to 10V and check that the relay R LS 2 still operates 3 Increase power supply voltage to 16V and check RF unmodulated output power is 6W A C and M Bands 8W E Bands Frequency Count Using a frequency counter to monitor the carrier frequency adjust each channel to its correct frequency by trimming appropriate coils on TX os...

Page 61: ...OCKET 3 19 LOW POWER TX AUDIO 4 1 4 2 _J AMP MULTIPLIER MOD DRIVER POWER AMP HIGH POWER MIC AMP COMPRESS GAIN H P FILTER LP FILTER GAIN TX MODULATOR TFI TF2 TF3 DISCRETE OR THICK OSCILLATOR r e POWER AMP E TX MULTIPLIER RX RF MODULE 2 3 4 8TX OSCILLATOR BUFFER AMP MOD DRIVER FILM MODULE r 13 SWITCHING ANTENNA ANTENNA FILTER S2 4 15 ...

Page 62: ...lator Electronic Voltmeter EVM Multimeter Audio Output Meter Test Extension Assemblies Kit 4 5V Battery 10 7 MHz Marker Oscillator N B All readings shown are typical 1 Receiver Oscillator Module 18 Using the EVM check for 0 6V RMS at pin 1 2 Receiver Oscillator Multiplier Module 5 Connect multimeter set to 2 5V range to TP2 At the RE Amplifier Module 1 set L7 flush with Mother Board and tune L8 fo...

Page 63: ...db greater than that at pin 1 5 IF Amplifier Module 2 Noise Limiter and AF Filter 3 Remove 10 7 MHz Crystal Filter by unfastening the two M3 nuts on the underside of Mother Board Remove 4 5V battery and refit Squelch IF Module 6 Set signal generator frequency to 10 7 MHz level to 15pV PD modulated 30 at 1 kHz Connect signal generator to pin 1 live and pin 2 ve of IF Module 2 Underside of Mother Bo...

Page 64: ... Crystal Filter 2 x M3 nuts on underside of Mother Board Inject 25 0 PD at 10 7 MHz 30 modulation at 1 kHz 4 1 Check I F TP1 1V DC 4 2 Check IF output 2 0 DC 4 3 Check Noise Limiter output 100mV RMS 4 4 Check AGC 4 7V DC Replace 10 7 MHz Crystal Filter If IF module satisfactory check 10 7 MHz Filter 5 10 7 MHz Filter Check a Prepare matching network as shown Remove RF module Connect network to Fil...

Page 65: ...OLD A 1 1V D C CLOSED B 0 25V D C OPEN 13 2 B C 100 mV RMS 3 4 TP1 INJECT 25 uV PD AT 10 7MHz 30 MOD AT 1KHz 4 FILTER CHECK SEE TEXT 4 7 V D C 4 4 A 4 7V B 4 7V D C C 3 0V ANTENNA SOCKET 3 3 Ve FILTER CHECK ONLY I 4 4 11 TP1 4 11 NOISE AMPLIFIER LIMITER 3 1 5 4 4 1 3 10 7MHz FILTER 3 4 A F AMPLIFIER VOLUME SQUELCH TP1 NOISE SQUELCH 3 2 2 13 ANT FILTER RX R F AMPLIFIER TX SQUELCH I DELAYED AMR DET ...

Page 66: ...Megohms Ohms x 106 Fractional values are shown thus 2622 2 2 ohms 2k2 2 2 kilohms 22 x 102 2M2 2 2 Megohms 22 x 105 ORDERING OF SPARE PARTS When ordering spares please quote the description and Part No of the item and the part number of the sub assembly on which it is used together with the equipment code number given on the identity plate fixed to the left hand side of the equipment The right is ...

Page 67: ...Plug co axial Extractor tool Extractor tool Extractor tool Scr st pan pozi No 6 x 12 5 mm Scr st 6B x 1 Scr st pan slot st No 6 x 3 8 Part No AT05294 AT85751 01 AT85751 04 AT29692 01 AT29685 01 AT12949 01 BT15618 01 AT12869 01 AT12869 02 AT12402 BT36470 AT85751 01 AT85751 04 AT10877 02 AT12405 AT26285 AT10877 02 BT15372 01 BT11227 BT27020 BT35823 QA00114 QA13002 X QA13464 B FS11525 FT10535 FT10537...

Page 68: ...ule 3 AT27746 Receiver AF Amplifier Module 4 AT27703 Receiver Multiplier Module 5 AT27594 Squelch IF and Delayed AGC Module 6 AT27602 Noise Squelch Module 7 AT27601 Receiver and Transmitter Oscillator Module 8 Single Channel AT27590 6 Channel AT27691 12 Channel AT27896 Lower Power Transmitter Audio Module 9 AT27597 Transmitter Multiplier Module 10 AT27595 Transmitter PA Module 11 AT12401 Switching...

Page 69: ...ket pan Hd at M3 x 25 mm Washer st cad pass M3 Hex nut st M3 Washer crinkle Washer st M3 Scr st pan pozi M3 x 6 mm Scr st pan pozi M4 x 25 mm Part No AT12737 AT12488 BT11116 PN26615 FW05093 K FW05093 R BT17301 AT27893 AT27604 BT047 36 BT26957 QA01103 BT20010 BT25143 BT 18466 BT18910 FG02572 FG02581 FG02576 PN99543 FS43820 AT12449 AT10765 10 QJ11580 X1 QJ11550 X1 QJ11551 X1 QA11607 A FT03706 BT3677...

Page 70: ... PN99719 C4 P8 Band 63V cer plate PN99564 C4 C Band 63V cer plate PN99566 C4 A Band 63V cer plate PN99568 C4 M2 Band 63V cer plate PN99571 C4 E Band C6 7 M2 Band 63V cer plate PN99600 C1 3 All Bands 100V poly PN99602 C2 All Bands 100V poly PQ99501 C8 All Bands 5 5 A Band M2 Band E Band C Band Capacitors 2p7 0p25 4p7 0p25 6p8 0p25 10p 2 18p 2 1n 10 2n2 10 100n 10 RF UNIT AT27605 1 A Band 148 174 MH...

Page 71: ...2 off Sub Modules Thick film module FU00508 TF1 Thick film module FU00509 TF2 Thick film module FU00510 TF3 or alternatively 1st RF Amplifier assembly AT27931 2nd RF Amplifier assembly AT27932 Mixer assembly AT27933 Coil Cores FCO2857 L1 L8 A M2 P8 C Band FCO2899 L1 L8 E Band 1st RF Amplifier Assembly AT27931 1A Resistors S2 100 5 0 125W 1k2 5 0 125W 4k7 5 0 125W metal oxide PL99757 R3 metal oxide...

Page 72: ...tors 1n 10 63V cer plate PN99811 C1 2 10n 20 80 40V cer plate PN99823 C3 4 Semi conductors Transistor SPF341 1 FV08999 TR 1 IF AMPLIFIER DETECTOR and AGC MODULE AT27600 2 Note The input stage of this module will be supplied in one of the following forms 1 Thick film module FU00511 TF1 or 2 IF input stage AT27754 TF1 Discrete version Refer to the appropriate sub heading for spares breakdown Resisto...

Page 73: ...T99005 L1 2 3 Coil Assembly AT32108 01 T1 Miscellaneous Items PWB Assembly AT12385 Washer BT09718 2 off 10 7 MHz Pliter FC03287 FL1 Sub Modules Thick film or alternatively FU00511 TF1 IF Amp input stage AT27754 comprising 18p 2 63V 68p 2 63V 1n 10 100V 4n7 10 100V 100n 20 35V 330n 35V 10 20 15 16V 33 10V Resistors 1k 5 0 125W 2k2 5 0 125W 4k7 5 0 125W metal oxide PL99769 R3 4 metal oxide PL99773 R...

Page 74: ... 10 20 15 16V elect PS99505 C11 22 20 15 16V elect PS99507 C3 8 Semiconductors Transistor BF244B FV05827 TR1 Transistor PBC108B FV05802 TR2 TR3 Transistor MPS A13 FV08935 TR4 Diode BAX16 FV05741 D1 Miscellaneous Items PWB Assembly AT12875 01 Resistors 2 AF AMPLIFIER MODULE AT27703 4 1 10 0 25W c film PM01400 R5 56 5 0 25W c film PM 01421 R3 68 5 0 125W metal oxide PL99756 R1 100 5 0 25W c film PM0...

Page 75: ...l Bands Capacitors Op51 10 cer tub PN00118 C9 A M2 Bands 1p8 PN99560 C13 A M2 C Bands C9 C Band 2p2 PN99561 C9 E P8 Bands 3p9 PN99563 C5 A M2 C Bands 0p25 63V cer plate C13 E P8 Bands 5p6 I PN99565 C7 A M2 Bands C5 A P8 Bands 8p2 PN99567 C7 E P8 C Bands 10p PN99568 C2 A M2 Bands 12p PN99569 C8 A M2 Bands 15p 2 63V cer plate PN99570 C11 A M2 Bands 18p PN99571 C2 8 11 E P8 Bands 22p PN99572 C2 8 C B...

Page 76: ...C11 33 10V elect PS99508 C9 10 Semi conductors Integrated Circuit FU09113 IC1 Transistor 2N5447 FV05828 TR1 Transistor PBC108 FV05800 TR2 Zener diode 5V6 FV05812 D1 Inductors Choke 15pH FT05749 L1 Choke 47pH FT99005 L3 Coil Assembly AT32106 01 L2 Miscellaneous Items Can BT15606 1 L2 NOISE SQUELCH MODULE AT27601 7 Resistors 2 100 5 0 25W c film PM01424 R8 13 19 470 5 0 125W metal oxide PL99765 R17 ...

Page 77: ...d 105 108 MHz AT27590 01 M2 Band 138 141 MHz AT27590 01 C Band 117 137 MHz AT27590 03 E Band 68 88 MHz AT27590 02 P8 Band 96 106 MHz AT27590 02 Resistors PM01424 PM01432 5 0 25W c film PM01434 PM01435 PM01444 R1 R7 All Bands R2 R8 All Bands R6 R12 All Bands R3 R9 All Bands R4 R R10 R11 All Bands 100 470 680 820 4k7 Capacitors 10p 1 PN99568 C3 A M2 C E P8 Bands 2 63V cer plate C8 A M1 C E P8 Bands ...

Page 78: ... No 0 25W c film PM01434 63V cer plate PN99600 63V cer plate PN99604 AT32172 01 AT32172 02 AT32172 03 FCO2977 Remarks Code Band R1 6 All Bands R13 18 C7 All Bands C1 6 All Bands L1 L6 A M1 M2 Bands L13 L18 L1 L6 C Band L13 L18 C E P8 Bands L1 L6 E P8 Bands L1 18 All Bands Mechanical Items P W Assy Pillar M3 x 50 Bracket 1 SW Index Switch Index Pozi Pan M3 x 6 mm Crystal Holder Scr st Pan Pozi Tapt...

Page 79: ...Hz AT27896 03 Resistors Description Part No Remarks Code Band 680 5 0 25W c film PM01434 R1 24 All Bands Capacitors 4n7 10 63V cer plate PN99604 C1 8 All Bands Inductors AT32172 01 AT32172 04 AT32172 05 AT32172 02 L1 24 A M1 Bands L1 2 E Band L1 12 E Band L1 24 C Band Mechanical Items PW Board Assy AT13201 Adaptor BT00016 Hex pillar M3 BT04419 Spindle BT28195 Clip QA01098 Washer st zinc pass M3 QA...

Page 80: ...n7 10 63V cer plate PN99604 C4 5 All Bands Inductors 17 5 uH FT99014 L1 All Bands Transistors B F152 FV05819 TR1 All Bands Mechanical Items Switch FS55860 SB All Bands PW Board Assy AT12399 Resistors 100 150 270 330 390 1k5 2 5 LOW POWER TX AUDIO MODULE 9 AT27597 PM01424 R2 PM01426 R9 PM01429 R7 PM01430 R1 PM01431 R10 250V c film PM01438 R3 18k PM01451 R4 47k PM01456 R5 6 8 68k PM01458 R11 Variabl...

Page 81: ...pacitors 1p8 PN99560 C8 10 A M1 C Bands 2p2 PN99561 C8 10 E Bands 3p3 PN99562 C2 M1 Bands 3p9 PN99563 C2 A Bands 4p7 _ 0p25 63V cer plate PN99564 C5 A M1 C Bands C2 E Bands 6p8 PN99566 C11 A Bands C2 C Band 8p2 PN99567 C3 7 12 A Band C11 M1 E C Bands C5 E Bands 12p PN99569 C13 A C Bands 18p PN99571 C7 12 E Bands 22p 2 63V cer plate PN99572 C3 13 E Bands 27p PN99573 C12 M1 Bands 33p PN99574 C3 7 13...

Page 82: ...or 2N3866 Transistor PT4544 Transistor 2N5641 Transistor MPX085 This item includes a washer Miscellaneous Heatsink Heatsink Scr st pan pozi M2 5 x 8 Label Clip 148 174 MHz 105 108 MHz 68 88 MHz 117 137 MHz FV05810 FV08956 FV07573 AT12902 FV05831 FV41806 BT36642 QA05714 QJ11581 X1 BT18919 10 BT16639 AT12401 01 AT12401 02 AT 12401 03 AT12401 04 TR1 M1 Band TR1 A C Bands TR1 E Band TR2 A M1 C Bands T...

Page 83: ...Band 68p PN99578 C9 M1 Band 100p PN99580 C23 A Band C26 A M1 Bands 2n2 10 100V cer plate PN99602 C6 11 16 19 25 27 A M1 Bands C28 M1 C Bands C29 A Band 100n 10 100V poly PQ99501 C5 20 A M1 Bands Variable Capacitors 2p 18p PV07670 C2 4 8 10 A M1 Bands 5p 55p PV07664 C12 14 22 24 A M1 Bands Semiconductors Diode 1N4001 FV05840 D1 Diode HP5082 2800 FV09541 D2 Inductors Choke 0 22pH FT99000 L9 A M1 C B...

Page 84: ...m PM01443 R9 PM01459 R12 Capacitors 27p 47p 68p 2 63V cer plate 100p 2n2 10 100V cer plate 100n 10 100V poly PN99573 C15 PN99567 C23 PN99578 C21 PN99580 C26 PN99602 C6 11 16 19 25 27 28 PQ99501 C5 20 Variable Capacitors 5 55p PV07664 C2 4 8 10 12 14 22 24 Semiconductors Diode 1N4001 FV05840 D1 Diode HP5082 2800 FV09541 D2 Inductors Choke 0 220 FT99000 L9 Choke 15 2H FT99004 L8 Choke Assembly AT319...

Page 85: ...538 C2 E P8 Band cer plate PN99566 C7 A Band cer tub PN99541 C6 A Band cer tub PN99567 C7 E Band cer tub PN99542 C6 M1 M2 C Bands C4 E Band cer plate PN99569 C1 A Band cer tub PN99543 C4 E P8 Band cer plate PN99570 C7 M1 M2 C Bands cer plate PN99571 C1 M1 M2 C Bands cer tub PN99546 C3 5 A Band cer plate PN99572 C1 E Band cer tub PN99526 C6 E E P8 Bands cer plate PN99574 C1 E P8 Bands cer tub PN995...

Page 86: ...3 47k PM01456 R2 Used for test purposes only Capacitors 10n PN50339 C47 50 12p PN99569 C36 100p PN99580 C31 33 470p PN99599 C59 1n PN99600 C14 40 46 51 54 58 2n2 PN99602 C23 26 28 30 34 35 39 4n7 PN99604 C7 13 15 22 37 55 56 10u PS23180 C57 470u PS99522 C36 680u PS99526 C3 4 1500u PS99527 C5 N B Capacitors 0 C1 0 C2 and 0 C3 are shown under the heading FRAME ASSY COMPLETE AT12745 Inductors AT31220...

Page 87: ...ng pin BT24774 3 off Scr st pozi csk M3 x 8 mm QJ11614 X 1 TR1 Hex nut st M3 QA11605 X 1 TR1 HIGH POWER TX MODULATOR MODULE 17 AT27696 Resistors 12 10 5 0 125W 250V 68 15 0 125W 250V 68 2 0 5W 350V 120 2 0 5W 350V 820 2 0 125W 250V 27k 5 0 125W 250V c film PL99750 R2 c film PL99756 R6 metal oxide PL99291 R5 metal oxide PL99294 R4 c film PL99768 R3 c film PL99785 R1 Capacitors 4n7 10 63V cer plate ...

Page 88: ...2854 01 AT12857 01 AT12860 AT12863 01 AT00007 ET17250 Trimming Tools Hexagonal 4BA Socket FT08001 Hexagonal key double ended FT08002 Hexagonal Wrench FT08004 Hexagonal Wrench FT08008 Hexagonal Wrench FT08014 Trimmer Flush insert AT12797 Trimmer DE 1 s driver insert ET16451 Trimmer DE 2 s driver ET16452 Hexagonal Wrench M2 5 BT29819 Allen Keys NOISE LIMITER AND AF FILTER 3 AT27592 NOTE This module ...

Page 89: ...N99602 C4 C5 10 u PS99513 C1 C2 C3 22µ PS99507 C7 33tt PS99508 C6 Resistors 220 PM01428 R1 560 PM01433 R3 1k PM01436 R2 Inductors 4 7µH FT99003 L1 Transistor PBC108 FV05800 T R1 Integrated Circuit Amp FU10299 I C 1 Mechanical Items PWB Mech Assy AT12388 Guide 2 off BT17558 Heatsink BT36640 Pan Hd Screw Slot M2 x 8 QJ11427 A 2 Heatsink Hex Nut M2 QA11603 A 2 Heatsink Washer BT09720 2 Heatsink Washe...

Page 90: ...C14 40 46 51 54 58 2n2 PN99602 C23 26 28 30 34 35 39 4n7 10 63V cer plate PN99604 C7 13 15 22 37 55 56 10n PN50339 C47 50 10u 25V elect PS23180 C57 470u 63V elect PS99522 C32 680u 16V elect PS99526 C3 4 1500u 16V elect PS99527 C5 N B Capacitors 0 C1 0 C2 and 0 C3 are shown under the heading FRAME ASSY COMPLETE AT12745 Inductors AT31220 01 L2 Bead AT31798 FB1 Miscellaneous Diode FV08961 D1 Connecto...

Page 91: ...Fig 5 1 Exploded View Note The identification numbers shown above appear against the relevant items in the Parts List ...

Page 92: ...02 Resistors 680 5 0 25W c film PM01434 R1 24 All Bands Capacitors 4n7 10 63V cer plate PN99604 C1 8 All Bands Inductors Core 1 Core 2 AT32172 01 L1 24 A M1 M2 Bands AT32172 02 L1 24 C Band AT32172 05 L1 12 E P8 Bands AT32172 04 L13 24 E P8 Bands FCO2977 L1 12 All Bands L13 24 A M1 M2 Bands FC36150 L13 24 E P8 Bands Mechanical Items PW Board Assy AT12398 Adaptor BT00016 Pillar M3 x 50 BT04419 Brac...

Page 93: ...NT FOR OPTIONAL PLUG IN MODULE SQUELCH POWER ON OFF VOLUME CHANNEL SWITCH Front View ANTENNA SOCKET L MICROPHONE OPTIONAL SOCKET FACILITY SOCKET 0 t 1 FUSE BLOCK O LOUDSPEAKER V200 OR A200 SOCKET POWER SWITCHING Rear View FIG 6 1 FRONT AND REAR VIEWS OF EQUIPMENT ...

Page 94: ...RV2 s SQUELCH 1 2 000 3 4 5 6 SB CHANNEL E UNDERSIDE RV1 VOLUME 00000 000 7 8 9 10 11 12 SA COMPONENT SIDE FIG 6 2 CONTROL MODULE COMPONENT LOCATION DIAGRAM ...

Page 95: ...T SIDE L 2 SA 1 RV2 R I 15 6 14 111111111111 1 2 3 4 5 6 7 8 9 10 11 12 C56 2 4 5 6 7 8 9 1 1 I0 7MHz FILTER I 2 211 1 151 i I 11 144 1105 6 11 L 5 1 i 3 44 1 0 5 4 0 3 C28 013 n 6 1 11 21 1 C48 CI4 0 I 16 16 C4711 740 1 68111 6012 572 011 319 N1 04 I PS 2 11 II U 5 7 re 9 10 C 6 5 4 3 2 1 LI 11045 C40 VP C41 7 4 20 1516 1 C44 C46 C43 5 31 hIs C42 0554 21 22 23 24 25 26 27 C9 5 iCIre 0 0 410 111 0...

Page 96: ...3 1920 21 324252627 221111314 1 n n L52 RV1 f I 3 4 II I I II IN E 11 26r sII sflsir a 6 6 ANTENNA SOCKET n SKS C5 TX 10 7MHzFILTER RX COMPONENT SIDE 1 3 SA RV2 14 SB II 11 12 II I I 1 1 ode 654 f 371 UNDERSIDE FIG 6 4 MOTHERBOARD RECEIVER MODULE TP169 LOCATIONS ...

Page 97: ...6 C5 R5 C3 4n7 4K7 820 N 1 R3 R4 56 R5 XLI T CI C2 6 C6 C8 Cl2 T2 5 R5 60 680 680 In to TP1 NOISE LIMITER AF FILTER AT27746 TP3 PIN 2 5KB T C11 71 059 In L470p AF AMPLIFIER AT27703 INJECT 40m 1 PO AT KHz FkV2 E 2 21 1 FULLY C 0 9V CLOCKWISE 0 9VMAX ANTI C OV CLOCKWISE D C PIN 12 5KB 0311 10 0 P SQUELCH Ve 5 L2 05 In C4 _L T 4n7 82p R3 _Lc6 Ve 4_4 9 4K7 8 5 15 5 7 2K7 0 05 30 0 0 25 I F DELAYED A G...

Page 98: ...4 Ve R 16 SKB C5 2 44 4 11 2 3 4 65 11111 II 10 7 6 2 L_ 1 El ANTENNA SOCKET U TX RX 10 7MHz FILTER Li COMPONENT SIDE LI RV2 14 SA 161 LP2 RVI LP1 SB 18 I I I I I L ei on 10 7MHz FILTER 1 1 1St 1 3 153 16 16 55 0 UNDERSIDE FIG 6 6 MOTHERBOARD TRANSMITTER TP169 MODULE LOCATIONS ...

Page 99: ... _L 4n7_T_ Ve TR1 BF152 R7 vor 100 4 C39 4n7 I C18 10 100 L2 1C9 0141 1 C15 in T T 4n7 Ve MP9 2 65V RMS 2n2 L1 iifC2 C3 I T Ve 1 C9 Ve v C8 1 In Ve C7 1 4 11 110 CII R10 4K7 T n7 L10 1 R8 2470 R3 11 C17 2n2 Ve C23 2K7 Ve Ve CI Re TR1 1 65 L11 C25 C24 2 L4 10 C6 Ve C13 F C14 _ 1 1C15 5 55p7 T C16 C2 LI 1 cL 9 A 1 I n 12 18p I 1 C3 C 4 218p C8 2 18p C9 TR2 BF152 1 05 n2 5 55p R9 1n r TR2 BF152 TR3 T...

Page 100: ... I I 1v 2 62 126 100 225 10n G 8 R210 6 C3 017_1_ ve 518 100 C8 61 010 411 Ve R22 C13 262 T20 Ve 15 1 85 0 85 6 0 R20 1 TR6 9 7 13 0113 1 PBC10813 3K3 R24 0 6 276 i 2 1 R 2 025 1 6 R23 c TR2e 711C10 CI4 C12 C4 C6 u R3 I 4 IRS 47K PBC10 8B 1 4 TRI PBC108 TR3 PBC108 2 5 6 6 2 C29 2N 5 447 T 2 I R7 I 8 C2 154 0K le C26 2 C2 04 R27 106 5 016 1 2 TF1 3 4 5 7 8 9 0 6 9 COMPONENT SIDE UNDERSIDE El COMPON...

Page 101: ...3 10 TP1 LI L2 C39 L3 TP2 L4 TP3 L3 C22 TP2 L2 ANTENNA SOCKET RX LB L6 L2 C29 TI 0C30 DC28 C11 RV1 C24 C22 C14 T PC C12 TP3 C10 5 C8 C20 TP2 C59 C4 C2 TP10C21 TP1 TP1 COMPONENT SIDE Amr JL11 1LI rinnn n C SA RV2 15 6 14 049 F a C53 CGD C46 C43 5 22 c50 20 21 22 73 2 4 2 5 2 4 6 16 17 19111 C42 I 16 C41 UNDERSIDE 111111 2 3 C56 5 5 7 8 3 102 5 11r 10 7MHz F LTER I 1 2 01 tot 2 3 C47 4 I C52 1L5 418...

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