Ericsson M-PD Maintenance Manual Download Page 19 | Manualshive

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SCHEMATIC DIAGRAM

Controller Board

A4WE04023

LBI-31629

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Summary of Contents for M-PD

Page 1: ...LBI 31677 ericssonz Maintenance Manual M PD SYSTEM 136 174 MHz PERSONAL TWO WAY FM RADIO COMBINATION Ericsson Inc Private Radio Systems Mountain View Road Lynchburg Virginia 24502 1 800 528 7711 Outsi...

Page 2: ...imum Attack Time 25 milliseconds PTT Pushed Audio Frequency Response Within 1 and 3 dB of a 6 dB octave pre emphasis from 300 Hz to 3000 Hz RECEIVE Sensitivity 12 dB SINAD 116 dBm Spurious Emissions 5...

Page 3: ...e squelch opening threshold can be programmed for each channel HB UHF 800 MHz GENERAL ELECTRIC GENERAL ELECTRIC GENERAL ELECTRIC OR OR STANDARD MODEL SCAN MODEL SYSTEM MODEL STANDARD CAPACITY HIGH CAP...

Page 4: ...first priority channel takes precedence over the second priority channel and the second priority channel takes precedence over the user selected channel Manual High Low Power Selection If programmed i...

Page 5: ...nnel by simultaneously depressing both the and volume buttons 4 Adjust the audio volume to the desired level by pressing the mark side to turn the volume up or the mark side to turn the volume down of...

Page 6: ...re boards as follows Radio Board carries the transmit receive and fre quency synthesizer circuits Control Board supports logic control and audio processor circuits Display Board carries LCD displays S...

Page 7: ...o Figure 6 RF Amplifier Mixer RF from the an tenna or UDC connector is coupled through transmit low pass filter FN and RF switching diode CR201 to the input of the RF amplifier circuit Low pass filter...

Page 8: ...quency phase and the reference VCTCXO and is applied to the VCO on frequency A lock detect output is developed from Pin 9 output of A102 This output is checked by the micro computer to prevent transmi...

Page 9: ...nal Data Buffer A5 The External Data Buffer is located between the UDC connector and the microcomputer for protection of the inter nal circuits Signaling Board The Signaling Board consists of the foll...

Page 10: ...en head wrench for removing set screws Pencil type soldering iron 25 40 Watts with a fine tip Step 1 To gain access to the radio loosen but do not remove the four captive screws shown at and Carefully...

Page 11: ...Figure 11 Disassembly Figure 12 Disassembly Step 1 Figure 13 Disassembly Step 2 Figure 14 Disassembly Step 3 LBI 31629 10...

Page 12: ...Figure 15 Disassembly Step 4 Figure 16 Disassembly Step 5 Figure 17 Disassembly Step 6 Figure 18 Disassembly Step 7 LBI 31629 11...

Page 13: ...B801508P2 Earpiece kit PDAC1B 19B801508P8 GE STAR Lanyard PDAE1A 19B801508P1 Speaker Microphone PDAE1B 19B801508P4 Speaker Microphone with GE STAR Lanyard PDAE1C 19B801508P6 Speaker Microphone Antenna...

Page 14: ...ds of time 2 A regularly performed duty cycle which allows the battery to expend only a limited portion of its capac ity If the nickel cadmium battery is only sparingly or seldom used and is left on c...

Page 15: ...INTERCONNECTION DIAGRAM LBI 31629 14...

Page 16: ...RADIO BOARD A4WE03739 40 OUTLINE DIAGRAM COMPONENT SIDE SOLDER SIDE LBI 31629 15...

Page 17: ...SCHEMATIC DIAGRAM RADIO SCHEMATIC DIAGRAM WITH TYPICAL VOLTAGE A4WE03739 40 LBI 31629 16...

Page 18: ...Controller Board A4WE04023 OUTLINE DIAGRAM COMPONENT SIDE SOLDER SIDE LBI 31629 17...

Page 19: ...SCHEMATIC DIAGRAM Controller Board A4WE04023 LBI 31629 18...

Page 20: ...Signalling Board A4WE04024 OUTLINE DIAGRAM SCHEMATIC DIAGRAM COMPONENT SIDE SOLDER SIDE M PD Signaling Board A4WE04024 LBI 31629 19...

Page 21: ...LCD Board A4WE03737 OUTLINE DIAGRAM COMPONENT SIDE SOLDER SIDE LBI 31629 20...

Page 22: ...SCHEMATIC DIAGRAM LCD 1 Board A4WE03737 LBI 31629 21...

Page 23: ...SCHEMATIC OUTLINE DIAGRAM Battery Packs LBI 31629 22...

Page 24: ...MECHANICAL PARTS BREAKDOWN M PD EXPLODED VIEW SYSTEM TYPE A1WL09006 LBI 31629 23...

Page 25: ...PARTS LIST LBI 31629 24...

Page 26: ...PARTS LIST LBI 31629 25...

Page 27: ...PARTS LIST LBI 31629 26...

Page 28: ...PARTS LIST LBI 31629 27...

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