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SRF-M73 SERVICE MANUAL US Model Panama Model Ver 1.0 1999. 03 SPECIFICATIONS FM STEREO/AM PLL SYNTHESIZED RADIO MICROFILM SECTION 1 SERVICING NOTES TABLE OF CONTENTS 1. SERVICING NOTES ............................................... 2 2. GENERAL ................................................................... 3 3. DISASSEMBLY ......................................................... 4 4. ELECTRICAL ADJUSTMENTS ......................... 6 5. DIAGRAMS 5-1. 5-2. 5-3. 5-4. Block Diagram ................................................................ Printed Wiring Boards ..................................................... Schematic Diagram ......................................................... IC Pin Function Description ........................................... 6. EXPLODED VIEWS ................................................ 19 7. ELECTRICAL PARTS LIST ............................... 20 Forced Reset The system microprocessor can be reset in the following procedure. 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”. 8 10 13 18 –2– SECTION 2 GENERAL –3– This section is extracted from instruction manual. SECTION 3 DISASSEMBLY · This set can be disassembled in the order shown below. Set Cabinet (Front) Assy Key Board Cabinet (Rear) Assy Main Board Knob (A) Note: Follow the disassembly procedure in the numerical order given. CABINET (FRONT)/(REAR) ASSY 2 three screws (B1.7 × 8) 1 Remove the battery case lid of the arrow. 2 two screws (B1.7 × 8) 4 cabinet (rear) assy 3 cabinet (front) assy KEY BOARD 1 three claws 2 Open the key board to direction of the arrow. 1 four claws –4– 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 S2 S1 2 screw (B1.7 × 8) 1 Remove two solders. KNOB (A) 2 two knobs (A) 1 claw 1 claw 3 two adaptors –5– SECTION 4 ELECTRICAL ADJUSTMENTS 0 dB = 1 µV AM IF ADJUSTMENT [AM] Setting: Band switch: AM Adjust for a maximum reading on level meter T1 AM RF signal generator AM VCO VOLTAGE ADJUSTMENT Put the lead-wire antenna close to the set. level meter 32 Ω + – set Adjustment Part Frequency Display L4 530 kHz (531 kHz) Reading on Digital Voltmeter 3 ± 0.1V Confirmation 1710 kHz (1602 kHz) 9 ± 1V (8.5 ± 1V) AM TRACKING ADJUSTMENT 30% amplitude 2 jack (J1) modulation by 400 Hz signal Output level: as low as possible Adjust for a maximum reading on level meter [FM] Setting: Band switch: FM L1 580 kHz (621 kHz) CT1 1,490 kHz (1,395 kHz) FM VCO VOLTAGE CONFIRMATION Frequency Display FM RF signal generator MAIN board TP (FM IN) 0.01 µF level meter 32 Ω + – set 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible Reading on Digital Voltmeter 87.5 MHz 3 ± 0.3V 108 MHz Less than 11 ± 1V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter 2 jack (J1) ( • Repeat the procedures in each adjustment several times, and the tracking adjustments should be finally done by the trimmer capacitors. L2 87.5 MHz CT2 108 MHz ): Panama model FM Free-Run Adjustment Setting: FM RF signal generator digital voltmeter MAIN board TP (VT) 450 kHz 0.01 µF + – MAIN board TP (FM IN) set Carrier frequency : 98 MHz Modulation : no modultion Output level : 0.1 V (100 dB) Adjustment Location: Main Board (See page 7) Procedure: 1. Connect the frequency counter to TP (MPX) as shown the figure below. 2. Tune the set to 98 MHz. 3. Adjust RT1 for 76 kHz reading on the frequency counter. Specification: 75.8 kHz to 76.2 kHz frequency counter MAIN board TP (MPX) 1 µF + + – Adjustment Location: MAIN board (See page 7) –6– SRF-M73 SECTION 5 DIAGRAMS 5-1. Adjustment Location: – MAIN BOARD (Component Side) – BLOCK DIAGRAM – MAIN BOARD (Conductor Side) – CF1 10.7MHz B+ VREF 26 CF2 450kHz 14 CT2 L1 AM FERRITE-ROD ANTENNA 19 AM RF IN CT1 AM TRACKING AM IF BUFFER Q4, 5 FM OSC AM OSC TP (VT) CT1, L1 24 22 15 14 2 IN1 POWER AMP OUT1 IN2 POWER AMP OUT2 REG VCC –1 5 2 IN2 OUT2 13 4 9 7 SWITCH AM IF AMP/ DET BAND SELECT OUT1 –2 AM FRONT-END D1-1 L4 AM VCO Voltage Adjustment AM IF IN R-CH OUT IN1 12 PD1 1/2 COUNTER PD2 1/2 COUNTER 9 3 BASS BOOST CONTROL ST IND VCO 2 1 29 4 LP GAIN MUTE CONTROL S2 6 MEGA BASS MT/SW AM IF CT2, L2 FM TRACKING TUNING INDICATOR T1 D2 (PANAMA) DECODER AMP FM IF AMP/ DISCRI 1 ON DET OFF DET IN FM RF FM IF IN VOL 6 VCO LOCAL 20 13 L-CH OUT PLL LPF1 L2 FM RF 16 HEADPHONE AMP IC3 RV1 REGULATOR PILOT DET LPF1 DX FM FRONT-END BASS BOOST AMP IC2 PLL LPF2 CF3: US CF4, 5: PANAMA 10.7MHz 7 PILOT DET LPF2 18 FM/AM MIX OUT AFC1/AGC B.P.F. BPF1 FM RF IN TUNE IND S1 FM SENS 21 FM DISCRI FM/AM FRONT-END, FM/AM DET, MPX IC1 10 12 27 L4 AM VCO VOLTAGE L.P.F. L3 FM OSC L4 AM OSC FM/AM BAND SELECT SWITCH Q3 D1-2 D3 CT1 AM Tracking Adjustment 5 6 FM VCO BUFFER Q1 COMPARATOR IC4 (2/2) 1 J1 2 (HEADPHONE) 3 VCOH AM IF IN BAND 10 – 13 15 14 16 24 52 COM0 – COM3 SEG0 – SEG14 CE KR0 – KR3 6–9 5 POWER IF ON KS0 – KS3 SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER, KEY CONTROL IC101 53 BEEP 17 XOUT 21 CS 20 CK 19 DATA TP (FM IN) 2 VCOL CT2 FM Tracking Adjustment L2 7 3 EO LOW-PASS FILTER Q101 COMPARATOR IC4 (1/2) XIN L1 AM Tracking Adjustment + RT1 FM FREE-RUN MUTE TP (MPX) B+ CMP IN RT1 FM Free-Run Adjustment 25 31 – 34 35 – 49 2 1 50 X101 75kHz VOLTAGE DETECT IC102 4 2 1 CS KEY MATRIX S101 – 111, 113 – 116 3 SK T1 AM IF Adjustment DO J1 DI LIQUID CRYSTAL DISPLAY LCD101 SYSTEM CONTROLLER (IC101), EEPROM (IC105) B+ DRY BATTERY SIZE “AAA” (IEC DESIGNATION R03) 2PCS. 3V FM/AM TUNER (IC1), HEADPHONE AMP (IC3) B+ EEPROM IC105 RIPPLE FILTER Q2 BASS BOOST AMP (IC2) B+ D105 PLL LOW-PASS FILTER CIRCUIT B+ DC/DC CONVERTER Q103, T101 AM IF AMP CIRCUIT B+ B+ SWITCH Q6 • SIGNAL PATH : FM : AM 05 –7– –8– –9– B+ SWITCH Q104 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 µs 2 Q103 Base-1, Collector-2 (RADIO ON mode) 200 mV/DIV, 100 ns/DIV 616 m Vp-p FM FREE-RUN 243 ns 3 Q103 Collector-1 (RADIO ON mode) 2 V/DIV, 100 ns/DIV 4.9 Vp-p 243 ns Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1/4 W or less unless otherwise specified. ¢ • : internal component. • C : panel designation. • U : B+ Line. • H : adjustment for repair. • Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal. • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM • Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances. • Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. • Circled numbers refer to waveforms. • Signal path. F : FM f : AM – 13 – – 14 – – 15 – – 16 – KEY MAIN Part No. Description Remark Ref. No. Part No. Description R134 R135 R136 R137 1-216-097-00 1-216-097-00 1-216-089-00 1-216-017-00 RES, CHIP RES, CHIP RES, CHIP RES, CHIP 100K 100K 47K 47 5% 5% 5% 5% 1/10W 1/10W 1/10W 1/10W C22 C23 C24 C25 C26 1-164-004-11 1-164-227-11 1-164-227-11 1-164-346-11 1-164-336-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.1uF 0.022uF 0.022uF 1uF 0.33uF R138 R139 R140 R141 R171 1-216-825-11 1-216-845-11 1-216-833-11 1-216-821-11 1-216-833-11 METAL CHIP METAL CHIP RES, CHIP METAL CHIP RES, CHIP 2.2K 100K 10K 1K 10K 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/16W 1/16W C27 C28 C29 C30 C31 1-164-336-11 1-163-021-11 1-164-004-11 1-163-809-11 1-104-912-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP 0.33uF 0.01uF 0.1uF 0.047uF 3.3uF R172 R173 R174 R176 R177 1-216-833-11 1-216-833-11 1-216-833-11 1-216-049-11 1-216-049-11 RES, CHIP RES, CHIP RES, CHIP RES, CHIP RES, CHIP 10K 10K 10K 1K 1K 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/10W 1/10W C32 C33 C34 C35 C36 1-126-162-11 1-126-157-11 1-164-336-11 1-164-336-11 1-163-229-11 ELECT ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 3.3uF 10uF 0.33uF 0.33uF 12PF 5% 50V 16V 25V 25V 50V C37 C38 C39 C40 C41 1-163-009-11 1-111-253-11 1-163-251-11 1-163-251-11 1-127-569-91 CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP 0.001uF 100uF 100PF 100PF 100uF 10% 20% 5% 5% 20% 50V 6.3V 50V 50V 4V C42 C43 C44 C45 C46 1-124-434-00 1-164-004-11 1-164-004-11 1-124-584-00 1-124-584-00 ELECT CERAMIC CHIP CERAMIC CHIP ELECT ELECT 220uF 0.1uF 0.1uF 100uF 100uF 20% 10% 10% 20% 20% 4V 25V 25V 10V 10V C47 C48 C49 C50 C52 1-163-021-11 1-162-970-11 1-163-021-11 1-162-970-11 1-162-970-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.01uF 0.01uF 0.01uF 0.01uF 0.01uF 10% 10% 10% 10% 10% 50V 25V 50V 25V 25V C54 C55 C56 C57 C58 1-135-259-11 1-126-518-11 1-126-518-11 1-163-009-11 1-164-004-11 TANTALUM CHIP ELECT ELECT CERAMIC CHIP CERAMIC CHIP 10uF 470uF 470uF 0.001uF 0.1uF 20% 20% 20% 10% 10% 6.3V 4V 4V 50V 25V C59 C60 C62 C63 C64 1-163-021-11 1-162-927-11 1-162-927-11 1-162-927-11 1-163-251-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.01uF 100PF 100PF 100PF 100PF 10% 5% 5% 5% 5% 50V 50V 50V 50V 50V C65 C73 C74 C75 1-162-927-11 1-162-970-11 1-163-021-11 1-164-004-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 100PF 0.01uF 0.01uF 0.1uF 5% 10% 10% 10% 50V 25V 50V 25V Ref. No. Remark 10% 10% 10% 10% 10% 10% 20% 20% 20% 25V 25V 25V 16V 25V 25V 50V 25V 25V 6.3V < SWITCH > S113 S114 S115 S116 1-572-499-11 1-572-499-11 1-572-499-11 1-572-499-11 SWITCH, TACTIL (POWER) SWITCH, TACTIL (HOLD) SWITCH, TACTIL (STRT/STOP) SWITCH, TACTIL (LAP/RESET) < TRANSFOMER > T101 1-449-138-71 TRANSFORMER, DC-DC CONVERTER < VIBRATOR > X101 1-767-517-11 VIBRATOR, CRYSTAL (75kHz) ************************************************************ A-3663-262-A MAIN BOARD, COMPLETE (US) A-3663-288-A MAIN BOARD, COMPLETE (Panama) ********************* * * 3-033-937-01 HOLDER (BAR ANT) < BAND PASS FILTER > BPF1 1-235-171-00 FILTER, BAND PASS < CAPACITOR > C1 C2 C3 C4 C5 1-163-141-00 1-163-141-00 1-163-092-00 1-162-908-11 1-163-809-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.001uF 0.001uF 9PF 3PF 0.047uF 5% 5% 0.25PF 0.25PF 10% 50V 50V 50V 50V 25V C6 C7 C8 C9 C10 1-163-131-00 1-163-231-11 1-163-251-11 1-163-021-11 1-126-157-11 CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT 390PF 15PF 100PF 0.01uF 10uF 5% 5% 5% 10% 20% 50V 50V 50V 50V 16V C11 C12 C13 C14 C16 1-126-157-11 1-126-162-11 1-113-619-11 1-135-181-21 1-162-970-11 ELECT ELECT CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP 10uF 3.3uF 0.47uF 4.7uF 0.01uF 20% 20% 16V 50V 10V 6.3V 25V C17 C18 C19 C20 C21 1-164-156-11 1-135-259-11 1-164-346-11 1-135-181-21 1-124-584-00 CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP TANTALUM CHIP ELECT 0.1uF 10uF 1uF 4.7uF 100uF 20% 10% 20% 20% 20% 25V 6.3V 16V 6.3V 10V < FILTER > CF1 CF2 CF3 CF4 CF5 1-760-237-11 1-579-638-11 1-760-237-11 1-760-237-11 1-760-233-71 FILTER, CERAMIC FILTER, CERAMIC FILTER, CERAMIC (US) FILTER, CERAMIC (Panama) FILTER, CERAMIC (Panama) < TRIMMER > CT1 CT2 1-141-298-11 CAP, TRIMMER 10PF 1-141-298-11 CAP, TRIMMER 10PF < DIODE > D1 – 21 – 8-719-072-59 DIODE SVC347S-TL SRF-M73 MAIN Ref. No. D2 D3 Part No. Description Remark 8-713-100-11 DIODE 1T362 8-713-100-11 DIODE 1T362 < IC > IC1 IC2 IC3 IC4 8-752-062-48 8-759-380-15 8-759-802-75 8-759-510-73 IC IC IC IC CXA1238M-T6 LA3550MTP-1 LA4533M BA10393F-E2 < SHORT > JC1 1-216-296-00 SHORT 0 (Panama) Ref. No. Part No. Description Remark R26 R27 1-216-833-11 RES, CHIP 1-216-821-11 METAL CHIP 10K 1K 5% 5% 1/16W 1/16W R28 R30 R31 R32 R33 1-216-821-11 1-216-073-00 1-216-073-00 1-216-093-00 1-216-825-11 METAL CHIP METAL CHIP METAL CHIP RES, CHIP METAL CHIP 1K 10K 10K 68K 2.2K 5% 5% 5% 5% 5% 1/16W 1/10W 1/10W 1/10W 1/16W R34 R35 R36 R37 R38 1-216-825-11 1-216-845-11 1-216-825-11 1-216-809-11 1-216-845-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 2.2K 100K 2.2K 100 100K 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/16W 1/16W R39 R40 R41 R43 R44 1-216-817-11 1-216-805-11 1-216-809-11 1-216-797-11 1-216-097-00 METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES, CHIP 470 47 100 10 100K 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/16W 1/10W R45 R46 R47 1-216-095-00 METAL CHIP 1-216-845-11 METAL CHIP 1-216-845-11 METAL CHIP 82K 100K 100K 5% 5% 5% 1/10W 1/16W 1/16W < JACK > J1 1-563-298-11 JACK (SMALL TYPE) (DIA. 3.5) (2) < COIL > L1 L2 L3 L4 L6 1-754-057-11 1-416-444-11 1-414-690-21 1-406-269-11 1-412-947-11 ANTENNA, FERRITE-ROD (AM) COIL, AIR-CORE INDUCTOR 82nH COIL (OSC) INDUCTOR 4.7uH L7 L8 L9 1-412-947-11 INDUCTOR 1-412-947-11 INDUCTOR 1-412-959-11 INDUCTOR < VARIABLE RESISTOR > 4.7uH 4.7uH 47uH RT1 RV1 1-238-663-11 RES, ADJ, CARBON 4.7K 1-237-352-21 RES, BAR, CARBON 20K/20K (VOL) < TRANSISTOR > TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR < SWITCH > Q1 Q2 Q3 Q4 Q5 8-729-102-07 8-729-120-28 8-729-905-35 8-729-905-35 8-729-905-35 2SC2223-F13 2SC1623-L5L6 2SC4081-R 2SC4081-R 2SC4081-R Q6 8-729-141-48 TRANSISTOR 2SB624-BV345 S1 S2 1-570-675-11 SWITCH, SLIDE (FM SENS) 1-570-675-11 SWITCH, SLIDE (MEGA BASS) < TRANSFORMER > T1 1-404-444-31 TRANSFORMER, IF ************************************************************ < RESISTOR > MISCELLANEOUS *************** R1 R2 R3 R4 R5 1-216-097-00 1-216-097-00 1-216-073-00 1-216-057-00 1-216-837-11 RES, CHIP RES, CHIP METAL CHIP METAL CHIP METAL CHIP 100K 100K 10K 2.2K 22K 5% 5% 5% 5% 5% 1/10W 1/10W 1/10W 1/10W 1/16W R6 R7 R8 R10 R11 1-216-121-00 1-216-813-11 1-216-821-11 1-216-832-11 1-216-827-11 RES, CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 1M 220 1K 8.2K 3.3K 5% 5% 5% 5% 5% 1/10W 1/16W 1/16W 1/16W 1/16W R12 R13 R14 R16 R17 1-216-849-11 1-216-825-11 1-216-033-00 1-216-001-00 1-216-827-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 220K 2.2K 220 10 3.3K 5% 5% 5% 5% 5% 1/16W 1/16W 1/10W 1/10W 1/16W R18 R19 R20 R21 R22 1-216-827-11 1-216-849-11 1-216-065-00 1-216-101-00 1-216-101-00 METAL CHIP METAL CHIP RES, CHIP METAL CHIP METAL CHIP 3.3K 220K 4.7K 150K 150K 5% 5% 5% 5% 5% 1/16W 1/16W 1/10W 1/10W 1/10W R23 R24 R25 1-216-845-11 METAL CHIP 1-216-821-11 METAL CHIP 1-216-833-11 RES, CHIP 100K 1K 10K 5% 5% 5% 1/16W 1/16W 1/16W 2 1-771-677-21 SWITCH, RUBBER KEY ************************************************************ ACCESSORIES & PACKING MATERIALS ******************************* 3-035-159-01 STRAP, HAND 3-866-487-11 MANUAL, INSTRUCTION (ENGLISH, SPANISH) (Panama) 3-866-487-21 MANUAL, INSTRUCTION (ENGLISH) (US) 8-953-142-90 HEADPHONE MDR-W14G//K SET Sony Corporation 9-926-979-11 Personal A&V Products Company – 22 – 99C0539-1 Printed in Japan © 1999. 3 Published by Quality Engineering Dept. (Shinagawa)