Related Manuals for Sony SRF-M73
Summary of Contents for Sony SRF-M73
- Page 1 SRF-M73 SERVICE MANUAL US Model Panama Model Ver 1.0 1999. 03 SPECIFICATIONS FM STEREO/AM PLL SYNTHESIZED RADIO MICROFILM...
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Page 2: Table Of Contents
SECTION 1 SERVICING NOTES TABLE OF CONTENTS Forced Reset The system microprocessor can be reset in the following proce- dure. SERVICING NOTES ..........2 Use these procedure when the unit cannot be worked normally due to the overrunning of the microprocessor, etc. GENERAL .............. -
Page 3: General
SECTION 2 This section is extracted from instruction manual. GENERAL – 3 –... -
Page 4: Disassembly
SECTION 3 DISASSEMBLY · This set can be disassembled in the order shown below. Cabinet (Front) Assy Key Board Main Board Knob (A) Cabinet (Rear) Assy Note: Follow the disassembly procedure in the numerical order given. CABINET (FRONT)/(REAR) ASSY 2 three screws (B1.7 ×... - Page 5 MAIN BOARD Note: Check that two switch (S1, S2) is latched with two adaptors when carrying out installation. 3 knob (vol) 5 main board 4 two claws 2 screw (B1.7 × 8) 1 Remove two solders. KNOB (A) 2 two knobs (A) 1 claw 1 claw 3 two adaptors...
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Page 6: Electrical Adjustments
SECTION 4 ELECTRICAL ADJUSTMENTS 0 dB = 1 µV AM IF ADJUSTMENT [AM] Adjust for a maximum reading on level meter Setting: 450 kHz Band switch: AM AM VCO VOLTAGE ADJUSTMENT Put the lead-wire AM RF signal antenna close to Adjustment Part Frequency Display Reading on Digital Voltmeter... -
Page 7: Diagrams
SRF-M73 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM Adjustment Location: – MAIN BOARD (Component Side) – – MAIN BOARD (Conductor Side) – VREF 10.7MHz BASS BOOST AMP HEADPHONE AMP FM/AM FRONT-END, FM/AM DET, MPX L-CH REGULATOR CF3: US FM SENS FM/AM... -
Page 9: Schematic Diagram
5-3. SCHEMATIC DIAGRAM • See page 17 for IC Block Diagrams. SRF-M73 • Waveforms – KEY Board – 1 IC101 @¢ XOUT 200 mV/DIV, 10 µs/DIV 208 m Vp-p 13.3 µ s 2 Q103 Base-1, Collector-2 (RADIO ON mode) 200 mV/DIV, 100 ns/DIV... - Page 14 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R134 1-216-097-00 RES, CHIP 100K 1/10W 1-164-004-11 CERAMIC CHIP 0.1uF R135 1-216-097-00 RES, CHIP 100K 1/10W 1-164-227-11 CERAMIC CHIP 0.022uF R136 1-216-089-00 RES, CHIP 1/10W 1-164-227-11 CERAMIC CHIP 0.022uF R137 1-216-017-00 RES, CHIP...
- Page 15 SRF-M73 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-713-100-11 DIODE 1T362 1-216-833-11 RES, CHIP 1/16W 8-713-100-11 DIODE 1T362 1-216-821-11 METAL CHIP 1/16W < IC > 1-216-821-11 METAL CHIP 1/16W 1-216-073-00 METAL CHIP 1/10W 8-752-062-48 IC CXA1238M-T6...