Sony SRF-M75PM - Walkman AM/FM Stereo Radio Service Manual Download Page 1 | Manualshive

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MICROFILM

SERVICE MANUAL

FM STEREO/AM PLL SYNTHESIZED RADIO

US Model

Canadian Model

AEP Model

E Model

Australian Model

SPECIFICATIONS

SRF-M75PM

US, Canadian, and
E models

AEP,
Australian models

Ver 1.0 1999. 04

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Summary of Contents for SRF-M75PM - Walkman AM/FM Stereo Radio

Page 1: ...CROFILM SERVICE MANUAL FM STEREO AM PLL SYNTHESIZED RADIO US Model Canadian Model AEP Model E Model Australian Model SPECIFICATIONS SRF M75PM US Canadian and E models AEP Australian models Ver 1 0 1999 04 ...

Page 2: ...microprocessor can be reset in the following proce dure Use these procedure when the unit cannot be worked normally due to the overrunning of the microprocessor etc Procedure 1 Set to radio OFF 2 While pressing the SCAN button press two buttons of START STOP and BAND simultaneously for 5 seconds 3 The unit is reset and display blinking AM 12 00 Notes on chip component replacement Never reuse a dis...

Page 3: ... 3 SECTION 2 GENERAL This section is extracted from instruction manual US Canadian and E models AEP Australian models ...

Page 4: ...ard Main Board Knob A Cabinet Rear Assy Cabinet Front Assy 2 three screws B1 7 8 2 two screws B1 7 8 1 Remove the battery case lid of the arrow 3 cabinet front assy 4 cabinet rear assy 1 three claws 2 Open the key board to direction of the arrow 1 four claws Note Follow the disassembly procedure in the numerical order given ...

Page 5: ...OB A Note Check that two switch S1 S2 is latched with two adaptors when carrying out installation 2 screw B1 7 8 1 Remove two solders 3 knob vol 4 two claws S1 S2 5 main board 2 two knobs A 1 claw 1 claw 3 two adaptors ...

Page 6: ...mes and the tracking adjustments should be finally done by the trimmer ca pacitors Adjustment Location Main Board See page 7 FM RF signal generator 22 5 kHz frequency deviation by 400 Hz signal Output level as low as possible level meter 2 jack J1 set MAIN board TP FM IN 32 Ω 0 01 µF digital voltmeter MAIN board TP VT FM Free Run Adjustment Setting Procedure 1 Connect the frequency counter to TP M...

Page 7: ... Adjustment Location MAIN BOARD Conductor Side L4 AM VCO Voltage Adjustment RT1 FM Free Run Adjustment CT1 AM Tracking Adjustment L1 AM Tracking Adjustment T1 AM IF Adjustment FM Tracking Adjustment CT2 L2 TP MPX TP FM IN TP VT J1 ...

Page 8: ...n the KEY board 2 Press the PULSE button S112 to enter pulse monitor mode 3 Adjust RT102 for 0 24 V reading on the digital voltmeter Specification 0 22 to 0 26 V Adjustment Location digital voltmeter KEY board TP LED KEY BOARD Component Side KEY BOARD Conductor Side RT102 Luminance Adjustment TP LED ...

Page 9: ...AY LCD101 VOLTAGE DETECT IC102 B SWITCH Q104 DC DC CONVERTER Q103 T101 B SWITCH Q6 AM IF BUFFER Q4 5 LOW PASS FILTER Q101 SIGNAL PATH FM AM 05 POWER AMP MUTE CONTROL BUFFER Q105 106 LUMINANCE PULSE METER COMPARATOR IC103 RIPPLE FILTER Q2 B SWITCH Q102 REGULATOR IC104 KEY MATRIX S101 116 KS0 KS3 KR0 KR3 X101 75kHz SYSTEM CONTROLLER IC101 EEPROM IC105 B FM AM TUNER IC1 HEADPHONE AMP IC3 B BASS BOOST...

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Page 11: ... terminal Voltages and waveforms are dc with respect to ground under no signal detuned conditions no mark FM AM PULSE Impossible to measure Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled numbers refer to wavefo...

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Page 16: ...CHIP 100K 5 1 16W R159 1 216 825 11 METAL CHIP 2 2K 5 1 16W R160 1 216 825 11 METAL CHIP 2 2K 5 1 16W R161 1 216 837 11 METAL CHIP 22K 5 1 16W R162 1 216 841 11 METAL CHIP 47K 5 1 16W R163 1 216 833 11 RES CHIP 10K 5 1 16W R164 1 216 841 11 METAL CHIP 47K 5 1 16W R165 1 216 841 11 METAL CHIP 47K 5 1 16W R171 1 216 833 11 RES CHIP 10K 5 1 16W R172 1 216 833 11 RES CHIP 10K 5 1 16W R173 1 216 833 11...

Page 17: ... 11 CERAMIC CHIP 0 01uF 10 25V C74 1 163 021 11 CERAMIC CHIP 0 01uF 10 50V C75 1 164 004 11 CERAMIC CHIP 0 1uF 10 25V FILTER CF1 1 760 237 11 FILTER CERAMIC CF2 1 579 638 11 FILTER CERAMIC CF3 1 760 237 11 FILTER CERAMIC EXCEPT Panama CF4 1 760 237 11 FILTER CERAMIC Panama CF5 1 760 233 71 FILTER CERAMIC Panama TRIMMER CT1 1 141 298 11 CAP TRIMMER 10PF CT2 1 141 298 11 CAP TRIMMER 10PF DIODE D1 8 ...

Page 18: ... 817 11 METAL CHIP 470 5 1 16W R40 1 216 805 11 METAL CHIP 47 5 1 16W R41 1 216 809 11 METAL CHIP 100 5 1 16W R43 1 216 797 11 METAL CHIP 10 5 1 16W R44 1 216 097 00 RES CHIP 100K 5 1 10W R45 1 216 095 00 METAL CHIP 82K 5 1 10W R46 1 216 845 11 METAL CHIP 100K 5 1 16W R47 1 216 845 11 METAL CHIP 100K 5 1 16W VARIABLE RESISTOR RT1 1 238 663 11 RES ADJ CARBON 4 7K RV1 1 237 352 21 RES BAR CARBON 20K...

Page 19: ... 26 SRF M75PM Sony Corporation Personal Audio Company 9 927 110 11 99D0577 1 Printed in Japan 1999 4 Published by General Engineering Dept ...

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