ICF-C793/C793L SERVICE MANUAL FM/AM PLL SYNTHESIZED CLOCK RADIO FM/MW/LW PLL SYNTHESIZED CLOCK RADIO. US Model Canadian Model Australian Model

Transcription

1 ICF-C793/C793L SERVICE MANUAL Ver US Model Canadian Model Australian Model ICF-C793 AEP Model ICF-C793/C793L UK Model ICF-C793L Photo: ICF-C793L SPECIFICATIONS ICF-C793 FM/AM PLL SYNTHESIZED CLOCK RADIO ICF-C793L FM/MW/LW PLL SYNTHESIZED CLOCK RADIO MICROFILM

2 TABLE OF CONTENTS 1. GENERAL DISASSEMBLY ELECTRICAL ADJUSTMENTS DIAGRAMS 4-1. Block Diagram Printed Wiring Boards Schematic Diagram IC Pin Function Description EXPLODED VIEWS ELECTRICAL PARTS LIST SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 ma (500 microampers.). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) To Exposed Metal Parts on Set 0.15 µf 1.5 kω AC voltmeter (0.75 V) Fig. A. Earth Ground Using an AC voltmeter to check AC leakage. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK! OR DOTTED LINE WITH MARK! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. HOW TO CHANGED THE CERAMIC FILTERS This model is used two ceramic filters of CF2 and CF3. You must used same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must changed two pieces together since it s supply two pieces in one package as a spare parts. mark CF2 Mark red blue Center frequency MHz MHz ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. CF3 orange black white MHz MHz MHz 2

3 SECTION 1 GENERAL This section is extracted from instruction manual. LOCATION OF CONTROLS 3

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5 Note: Follow the disassembly procedure in the numerical order given. SECTION 2 DISASSEMBLY CHASSIS ASS Y 3 rear cabinet 4 connector (CN301) 7 chassis assy 1 four screws (P3 14) 5 Break the soldering of speaker lead. 6 button (DST) 2 claw 6 knob (brightness) 2 three claws 1 screw (P3 14) POWER CORD SETTING Set the power cord as illustrated below, then install the cabinet. Put the secondary flat cable between bosses to fix. rear cabinet power cord boss rear cabinet power cord 5

6 SECTION 3 ELECTRICAL ADJUSTMENTS 0 db = 1 µv [FM] Setting: Band switch: FM FM RF signal generator 22.5 khz frequency deviation by 400 Hz signal Output level: as low as possible [AM (MW/LW)*] *AM : ICF-C793 MW/LW : ICF-C793L Setting: Band switch: AM (MW/LW) AM RF signal generator 0.01 µf FM antenna in set Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. Remove FM antenna in FM adjustments. Adjustment Location: Main Board (See page 7) MAIN board TP (SP +) level meter 8 Ω + MAIN board TP (SP GND) 8 Ω set + 30% amplitude modulation by MAIN board TP (SP GND) 400 Hz signal Output level: as low as possible MAIN board TP (VT) Put the lead-wire antenna close to the set. digital voltmeter + MAIN board TP (SP +) level meter FM VCO VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L MHz 3 V ± 0.1V Confirmation 108 MHz Less than 11.8 V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L MHz TC3 108 MHz AM (MW) VCO VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L5 530 khz (531kHz *1) 2.65 V ± 0.1V Confirmation 1,710 khz (1,602 khz *1) AM (MW) TRACKING ADJUSTMENT Less than 10 V (9.5 V *1) Adjust for a maximum reading on level meter. L1 (L1-1 *2) 580 khz (621 khz *1) TC1 1,490 khz (1,404 khz *1) LW VCO VOLTAGE ADJUSTMENT *2 Adjustment Part Frequency Display Reading on Digital Voltmeter TC4 153 khz 2.25 V ± 0.05V Confirmation 279 khz Less than 9.5 V LW TRACKING ADJUSTMENT *2 Adjust for a maximum reading on level meter. L khz TC2 243 khz AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 450 khz *1) Except US, Canadian models *2) -ICF-C793L 6

7 Adjustment Location: MAIN BOARD (Component Side) MAIN BOARD (Conductor Side) TC4 LW VCO Voltage Adjustment * L5 AM (MW) VCO Voltage Adjustment L4 FM VCO Voltage Adjustment TP (VT) TP (SP+) TP (SP GND) TP (FM-IN) T1 AM IF L3 TC3 FM Tracking Adjustment TC2 L1-2 L1 (L1-1*) AM (MW) Tracking Adjustment LW Tracking Adjustment * TC1 AM (MW) Tracking Adjustment *) ICF-C793L 7

8 SECTION 4 DIAGRAMS ICF-C793/C793L 4-1. BLOCK DIAGRAM L3, TC3 FM TRACKING L1-1 (MW) ANT1 FM LEAD ANTENNA L1 AM (MW/LW) FERRITE-ROD ANTENNA (C793) L1, TC1 AM TRACKING B.P.F. BPF1 L1-1, TC1 MW TRACKING L3 FM RF (C793) D2 TC FM RF IN AM RF IN 9 FM RF FM FRONT-END AM FRONT-END + FM/AM CF2 FM FE OUT MHz IF IN 17 T1 AM IF CF1 450kHz CF3 10.7MHz 2 16 FM/AM FRONT-END, FM/AM IF AMP, DET, AGC, AF AMP IC1 FM DISCRI AM IF IN FM IF AMP FM DISCRIMINATOR AM IF AMP, AGC, DET + DET OUT Q5 TONE CONTROL SWITCH AF IN AF POWER AMP AF OUT 27 SIGNAL PATH : FM : AM (MW/LW) SP301 (SPEAKER) L1-2 (LW) TC2 L1-2, TC2 LW TRACKING Q1 MW/LW SWITCH D1-2 TC1 D4-1 D1-1 L5 AM (MW) VCO VOLTAGE L5 AM (MW/LW) OSC TC4 LW VCO VOLTAGE TC4 AM OSC FM OSC 5 7 (C793) D4-2 D1-3 L4 FM VCO VOLTAGE D3 L4 FM OSC FM/AM BAND SELECT 15 TUNING METER METER 19 NF VOL 3 4 MUTING Q4 VR1 VOL Q3 MW/LW SWITCH LOW-PASS FILTER Q50, 51 Q52 MW/LW SWITCH CONTROL D74 D75 A RADIO B BUZZER (LCD BACK LIGHT) S50 BRIGHTNESS D60, 61 B+ X50 75kHz 1 2 XOUT XIN 15 PD1 DATA DA CLK CK CE CE FM/AM PLL IC AM IN FM IN 8 P1 7 P0 B+ SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL IC100 D74 D75 2 ALM A LED DRIVE Q53, ALM B D70 73 (LCD BACK LIGHT) 1 HIGH LOW D BZ-CTRL 36 BUZZER 33 MUTE X1 X2 XT1 XT2 S0 S23 COM0 COM3 KS0 KS4 KR0 KR3 RESET PDET , X MHz X kHz LIQUID CRYSTAL DISPLAY LCD100 S101, (KEY MATRIX) RESET SIGNAL GENERATOR IC101 BACKUP B+ (SYSTEM CONTROLLER IC100 B+) D100 B+ D101 REGULATOR Q57 RECT D T301 POWER TRANSFORMER AC IN VT B+ RECT D

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10 ICF-C793/C793L 4-3. SCHEMATIC DIAGRAM IC Block Diagrams MAIN BOARD IC1 CXA1019M FM/AM IF OUT FE GND FM RF IN NC AM RF IN FM RF REG OUT FM OSC AFC AM OSC VOL NF FM DISCRI GND FM FE FM IF FM DISCRIMINATOR AM FE AF POWER AMP TUNING METER AM IF DET AGC FM/AM BAND SELECT AM IF IN FM IF IN NC METER IF GND AFC AGC AFC AGC DET OUT AF IN RIPPLE FILTER VCC AF OUT GND IC50 BU2614FS VSS PD1 VDD1 VDD2 FM IN AM IN P2 IF-IN Waveforms MAIN BOARD 1 IC50 2 (X IN) 1 V/DIV, 10 µs/div PHASE DETECT XOUT XIN 2 IC100!ª (XT1) 1 V/DIV, 20 µs/div 30.5 µs MAIN CONTROL PRESCALLER I/O CONTROL REGISTER CE CK DA 3 (X1) 1 V/DIV, 500 ms/div CD 10 OUTPUT CONTROL 8 P0 P1 2 Vp-p 9 IF COUNTER 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. Note: The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque! sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié. U : B+ Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW/LW) 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 (MW/LW) Abbreviation AUS : Australian model CND : Canadian model FR : French model 1.9 Vp-p 2 Vp-p 13.3 µs ns Note: Press either [+] or [ ] key when RADIO is being operated, oscillation will be given out for 250 ms. Oscillation will be given out for 250 ms when the power is turned on

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14 SECTION 6 ELECTRICAL PARTS LIST ALARM KEY MAIN NOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. -XX and -X mean standardized parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable Abbreviation AUS : Australian model CND : Canadian model FR : French model Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. SEMICONDUCTORS In each case, u: µ, for example: ua.. : µa.. upa.. : µpa.. upb.. : µpb.. upc.. : µpc.. upd.. : µpd.. CAPACITORS uf: µf COILS uh: µh The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque! sont critiquens pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. When indicating parts by reference number, please include the board. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * ALARM KEY BOARD **************** <SWITCH> S SWITCH, KEYBOARD (-, ALARM TIME) S SWITCH, KEYBOARD (+, ALARM TIME) S SWITCH, KEYBOARD (B, ON/OFF) S SWITCH, KEYBOARD (-, ALARM TIME) S SWITCH, KEYBOARD (+, ALARM TIME) S SWITCH, KEYBOARD (A, ON/OFF) ************************************************************* A A MAIN BOARD, COMPLETE (C793: US, CND) A A MAIN BOARD, COMPLETE (C793: AUS) A A MAIN BOARD, COMPLETE (C793: AEP) A A MAIN BOARD, COMPLETE (C793L: FR) A A MAIN BOARD, COMPLETE (C793L: UK) ********************* HOLDER (LCD) <ANTENNA> ANT ANTENNA, FM WIRE (FM LEAD ANTENNA) <BAND PASS FILTER> BPF FILTER, BAND PASS <CAPACITOR> C ELECT 10uF 20% 50V C CERAMIC CHIP 0.022uF 10% 50V C CERAMIC CHIP 0.1uF 10% 25V C CERAMIC CHIP 0.033uF 10% 25V C ELECT 10uF 20% 50V C CERAMIC CHIP 2PF 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 10PF 0.5PF 50V (C793) C CERAMIC CHIP 12PF 5% 50V C ELECT 1uF 20% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 430PF 5% 50V C CERAMIC CHIP 0.033uF 10% 25V C CERAMIC CHIP 10PF 0.5PF 50V C ELECT 220uF 20% 10V C ELECT 22uF 20% 25V C CERAMIC CHIP 1uF 10% 10V C CERAMIC CHIP 1uF 10% 10V C ELECT 220uF 20% 10V C CERAMIC CHIP 330PF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.1uF 10% 25V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 120PF 5% 50V C CERAMIC CHIP 100PF 5% 50V C CERAMIC CHIP 0.001uF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 7PF 0.25PF 50V C CERAMIC CHIP 0.001uF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 0.01uF 10% 50V C ELECT 4.7uF 20% 50V C CERAMIC CHIP 0.001uF 10% 50V C CERAMIC CHIP 0.33uF 10% 16V C CERAMIC CHIP 220PF 5% 50V C ELECT 47uF 20% 10V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.22uF 10% 16V C CERAMIC CHIP 15PF 5% 50V C CERAMIC CHIP 15PF 5% 50V C ELECT 220uF 20% 10V C CERAMIC CHIP 220PF 5% 50V C CERAMIC CHIP 0.22uF 10% 16V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 0.1uF 10% 25V C DOUBLE LAYER 0.022F 5.5V 19

15 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C CERAMIC CHIP 22PF 5% 50V C CERAMIC CHIP 22PF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 0.001uF 10% 50V C CERAMIC CHIP 0.1uF 25V C ELECT 2200uF 20% 10V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C ELECT 220uF 20% 25V <FILTER> * CF FILTER, CERAMIC (450kHz) (C793) CF FILTER, CRYSTAL (450kHz) CF FILTER, CERAMIC (10.7MHz) CF FILTER, CERAMIC (10.7MHz) IC IC upd753106gc-053-ab8 IC IC S-80820ALUP-EAH-T2 <SHORT> JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 <CONNECTOR> * CN SOCKET, CONNECTOR 5P <DIODE> D DIODE SVC354S-TR D DIODE 1T362 D DIODE 1T362 D DIODE SVC347S-TL (C793) D DIODE 1SS120RX (C793: US, CND) D DIODE 1SS120RX (C793: US, CND) D DIODE DTZ5.1B D DIODE 1SS355TE-17 D DIODE 1SS355TE-17 D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED TLYE262(NP.TPK51) (A RADIO, LCD BACK LIGHT) D LED TLYE262(NP.TPK51) (B BUZZER, LCD BACK LIGHT) D DIODE 1SS120RX D DIODE 1SS355TE-17 D DIODE 1SS355TE-17 D DIODE 1N4002L D DIODE 1N4002L D DIODE 1N4002L D DIODE 1N4002L D DIODE 1SS120RX <IC> JC SHORT 0 JC SHORT 0 (C793: US, CND) JC SHORT 0 (C793: US, CND) JC SHORT 0 JC SHORT 0 JC SHORT 0 (C793: AUS/C793L: FR) JC SHORT 0 (C793: AEP/C793L: FR) JC SHORT 0 (C793L: UK) JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 (C793: US, CND) <COIL> L COIL, AIR-CORE L COIL, AIR-CORE L COIL (OSC) <LIQUID CRYSTAL DISPLAY> IC IC CXA1019M IC IC BU2614FS LCD DISPLAY PANEL, LIQUID CRYSTAL 20

16 MAIN MAIN KEY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark <IC LINK> PS LINK, IC (C793: AEP, AUS/C793L) <TRANSISTOR> R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W Q TRANSISTOR 2SC2223-F13 Q TRANSISTOR 2SC2223-F13 Q TRANSISTOR 2SA1162-G Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SA1162-G Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SD400-E <RESISTOR> R METAL CHIP 3.3M 5% 1/10W R RES, CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 330 5% 1/10W R RES, CHIP 1K 5% 1/10W R METAL CHIP 22K 5% 1/10W R RES, CHIP 100K 5% 1/10W R RES, CHIP 1M 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 47 5% 1/10W R METAL CHIP 3.3K 5% 1/10W (C793: US, CND) R RES, CHIP 4.7K 5% 1/10W (C793: AEP, AUS/C793L) R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 8.2K 5% 1/10W R RES, CHIP 1K 5% 1/8W R METAL CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 220 5% 1/10W R RES, CHIP 1K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 10K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 47 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 47 5% 1/10W R METAL CHIP 150 5% 1/10W R METAL CHIP 150 5% 1/10W R METAL CHIP 150 5% 1/10W R METAL CHIP 150 5% 1/10W R RES, CHIP 220 5% 1/8W R RES, CHIP 220 5% 1/8W R METAL CHIP 470 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 330K 5% 1/10W R RES, CHIP 4.7K 5% 1/8W R RES, CHIP 4.7K 5% 1/8W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 100K 5% 1/8W R METAL CHIP 10 5% 1/10W R METAL CHIP 22K 5% 1/10W R METAL CHIP 10K 5% 1/10W R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 10K 10% 1/8W R RES, CHIP 1K 5% 1/8W <SWITCH> S SWITCH, SLIDE (BRIGHTNESS) S SWITCH, KEY BOARD (D. S. T./SUMMER T. ) <TRANSFORMER> T TRANSFORMER, IF <VARIABLE CAPACITOR> TC CAP, ADJ 10PF TC CAP, ADJ 40PF TC CAP, ADJ 10PF TC CAP, ADJ 40PF <VARIABLE RESISTOR> VR RES, VAR, CARBON 50K (VOL) <VIBRATOR> X VIBRATOR, CRYSTAL (75kHz) X VIBRATOR, CRYSTAL (32.768kHz) X VIBRATOR, CERAMIC (4.19MHz) ************************************************************ * MAIN KEY BOARD *************** <SWITCH> S SWITCH, KEYBOARD (1, WAKE UP STATION) S SWITCH, KEYBOARD (ALARM RESET, RADIO OFF) S SWITCH, KEYBOARD (BAND) S SWITCH, KEYBOARD (5) S SWITCH, KEYBOARD (SLEEP, RADIO ON) S SWITCH, KEYBOARD (CLOCK) S SWITCH, KEYBOARD (+, TUNE/TIME SET) S SWITCH, KEYBOARD (-, TUNE/TIME SET) S SWITCH, KEYBOARD (3) S SWITCH, KEYBOARD (4) 21

17 ICF-C793/C793L MAIN KEY TRANSFORMER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark S SWITCH, KEYBOARD (SNOOZE/DATA/SLEEP OFF) S SWITCH, KEYBOARD (2) ************************************************************* * TRANSFORMER BOARD ******************* * TERMINAL (C793: AEP, AUS/C793L) <CONNECTOR> * CN PIN, CONNECTOR (SMALL TYPE) 4P <TRANSFORMER>!T TRANSFORMER, POWER (C793: US, CND)!T TRANSFORMER, POWER (C793: AEP, AUS/C793L) ************************************************************ MISCELLANEOUS **************! CORD, POWER (C793: AEP/C793L: FR)! CORD, POWER (C793L: UK)! CORD, POWER (C793: US, CND)! CORD, POWER (C793: AUS) SP SPEAKER (6.6cm) L ANTENNA, FERRITE-ROD (AM) (C793) L ANTENNA, FERRITE-ROD (LW/MW) ************************************************************ ACCESSORIES & PACKING MATERIALS ******************************* MANUAL, INSTRUCTION (ENGLISH, FRENCH, GERMAN, DUTCH) (C793: CND, AEP, AUS/C793L) MANUAL, INSTRUCTION (ENGLISH) (C793: US) MANUAL, INSTRUCTION (ENGLISH, ITALIAN, SPANISH, PORTUGUESE) (C793: AEP/C793L: FR) MANUAL, INSTRUCTION (ENGLISH, SWEDISH, DANISH, FINNISH) (C793: AEP) The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié Sony Corporation Personal A&V Products Company 22 99B Printed in Japan Published by Quality Engineering Dept. (Shinagawa)

18 ICF-C793/C793L SERVICE MANUAL Ver US Model Canadian Model E Model Australian Model ICF-C793 AEP Model ICF-C793/C793L UK Model ICF-C793L Photo: ICF-C793L SPECIFICATIONS ICF-C793 FM/AM PLL SYNTHESIZED CLOCK RADIO ICF-C793L FM/MW/LW PLL SYNTHESIZED CLOCK RADIO MICROFILM

19 TABLE OF CONTENTS 1. SERVICING NOTES GENERAL DISASSEMBLY ELECTRICAL ADJUSTMENTS DIAGRAMS 5-1. Block Diagram IC Pin Function Description Schematic Diagram Printed Wiring Boards (SUFFIX-11) Printed Wiring Boards (SUFFIX-12) EXPLODED VIEWS ELECTRICAL PARTS LIST SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 ma (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) To Exposed Metal Parts on Set 0.15 µf 1.5 kω AC voltmeter (0.75 V) Fig. A. Earth Ground Using an AC voltmeter to check AC leakage. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK! OR DOTTED LINE WITH MARK! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. 2

20 SECTION 1 SERVICING NOTES Discrimination of MAIN board MAIN BOARD (Component Side) HOW TO CHANGED THE CERAMIC FILTERS This model is used two ceramic filters of CF2 and CF3. You must used same type of color marked ceramic filters in order to meet same specifications. Therefore, the ceramic filter must changed two pieces together since it s supply two pieces in one package as a spare parts. CF2 Mark red Center frequency MHz mark blue orange MHz MHz CF3 black MHz or white MHz 3

21 SECTION 2 GENERAL This section is extracted from instruction manual. LOCATION OF CONTROLS 4

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23 Note: Follow the disassembly procedure in the numerical order given. SECTION 3 DISASSEMBLY CHASSIS ASSY 3 rear cabinet 4 connector (CN301) 7 chassis assy 1 four screws (P3 14) 5 Break the soldering of speaker lead. 6 button (DST) 2 claw 6 knob (brightness) 2 three claws 1 screw (P3 14) POWER CORD SETTING Set the power cord as illustrated below, then install the cabinet. Put the secondary flat cable between bosses to fix. rear cabinet power cord boss rear cabinet power cord 6

24 SECTION 4 ELECTRICAL ADJUSTMENTS 0 db = 1 µv [FM] Setting: Band switch: FM FM RF signal generator 22.5 khz frequency deviation by 400 Hz signal Output level: as low as possible [AM (MW/LW)*] *AM : ICF-C793 MW/LW : ICF-C793L Setting: Band switch: AM (MW/LW) AM RF signal generator 0.01 µf TP (FM-IN) set Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. Remove FM antenna in FM adjustments. Adjustment Location: Main Board (See page 8) MAIN board TP (SP +) level meter 8 Ω + MAIN board TP (SP GND) 8 Ω set + 30% amplitude modulation by MAIN board TP (SP GND) 400 Hz signal Output level: as low as possible MAIN board TP (VT) Put the lead-wire antenna close to the set. digital voltmeter + MAIN board TP (SP +) level meter FM VCO VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L MHz 3 V ± 0.1V Confirmation 108 MHz Less than 11.8 V FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L MHz TC3 108 MHz AM (MW) VCO VOLTAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter L5 530 khz (531kHz *1) 2.65 V ± 0.1V Confirmation 1,710 khz (1,602 khz *1) AM (MW) TRACKING ADJUSTMENT Less than 10 V (9.5 V *1) Adjust for a maximum reading on level meter. L1 (L1-1 *2) 580 khz (621 khz *1) TC1 1,490 khz (1,404 khz *1) LW VCO VOLTAGE ADJUSTMENT *2 Adjustment Part Frequency Display Reading on Digital Voltmeter TC4 153 khz 2.25 V ± 0.05V Confirmation 279 khz Less than 9.5 V LW TRACKING ADJUSTMENT *2 Adjust for a maximum reading on level meter. L khz TC2 243 khz AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T1 450 khz *1) Except US, Canadian models *2) ICF-C793L 7

25 Adjustment Location: MAIN BOARD (Component Side) MAIN BOARD (Conductor Side) TC4 LW VCO Voltage Adjustment * L5 AM (MW) VCO Voltage Adjustment L4 FM VCO Voltage Adjustment TP (VT) TP (SP+) TP (SP GND) TP (FM-IN) T1 AM IF L3 TC3 FM Tracking Adjustment TC2 L1-2 L1 (L1-1*) AM (MW) Tracking Adjustment LW Tracking Adjustment * TC1 AM (MW) Tracking Adjustment *) ICF-C793L 8

26 SECTION 5 DIAGRAMS ICF-C793/C793L 5-1. BLOCK DIAGRAM L3, TC3 FM TRACKING 5-2. IC PIN FUNCTION DESCRIPTION MAIN BOARD IC100 µpd753106gc-053-ab8 (SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL) L1-1 (MW) ANT1 FM LEAD ANTENNA L1 AM (MW/LW) FERRITE-ROD ANTENNA L1-2 (LW) TC2 (C793) L1-2, TC2 LW TRACKING L1, TC1 AM TRACKING Q1 MW/LW SWITCH D1-2 B.P.F. BPF1 L1-1, TC1 MW TRACKING TC1 L3 FM RF (C793) D4-1 D1-1 D2 L5 AM (MW/LW) OSC TC3 Q3 MW/LW SWITCH FM RF IN AM RF IN L5 AM (MW) VCO VOLTAGE TC4 LW VCO VOLTAGE TC4 9 FM RF FM FRONT-END AM FRONT-END AM OSC FM/AM FRONT-END, FM/AM IF AMP, DET, AGC, AF AMP IC (C793) D4-2 D1-3 FM/AM CF2 FM FE OUT MHz IF IN 17 FM OSC T1 AM IF L4 FM VCO VOLTAGE D3 L4 FM OSC CF1 450kHz 16 AM IF IN FM/AM BAND SELECT 15 FM IF AMP AM IF AMP, AGC, DET CF3 10.7MHz TUNING METER METER 19 2 FM DISCRI FM DISCRIMINATOR + DET OUT Q5 TONE CONTROL SWITCH AF IN AF POWER AMP NF VOL 3 4 AF OUT MUTING Q4 27 VR1 VOL SIGNAL PATH : FM : AM (MW/LW) SP301 (SPEAKER) Pin No. Pin Name I/O Description 1 BIAS O Liquid crystal display drive bias control output terminal 2 to 4 VLC0 to VLC2 Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage 5 NC O Not used (open) 6 ALM A O LED drive signal output of the LCD back light LED (D74) H output at alarm A setting (LED on) 7 ALM B O LED drive signal output of the LCD back light LED (D75) H output at alarm B setting (LED on) 8 KS4 O Key scan signal output of the key matrix (S101, S201 to S218) 9 VSS Ground terminal 10 to 13 KS0 to KS3 O Key scan signal output of the key matrix (S101, S201 to S218) 14 to 17 KR0 to KR3 I Key return signal input of the key matrix (S101, S201 to S218) 18 RESET I System reset signal input from the reset signal generator (IC101) L : reset L is input for several 100 msec after power on, then it changes to H 19 XT1 I Sub system clock input terminal ( khz) 20 XT2 O Sub system clock output terminal ( khz) 21 IC Connected to power supply (+3.8V) 22 X1 I Main system clock input terminal (4.19 MHz) 23 X2 O Main system clock output terminal (4.19 MHz) 24 VDD Power supply terminal (+3.8V) 25 NC I Not used (open) 26 CLK O PLL serial data transfer clock signal output to the FM/AM PLL (IC50) 27 DATA O PLL serial data output to the FM/AM PLL (IC50) X50 75kHz 1 2 XOUT XIN X1 LOW-PASS FILTER Q50, 51 X PD1 XT1 DATA DA CLK CK CE CE XT FM/AM PLL IC AM IN FM IN S0 S23 COM0 COM BIAS 1 8 P1 7 P0 (SUFFIX 12) B+ Q52 MW/LW SWITCH CONTROL SYSTEM CONTROLLER, LCD DRIVER, KEY CONTROL IC100 VLC0 2 VLC1 VLC2 3 D74 D75 A RADIO B BUZZER (LCD BACK LIGHT) S50 BRIGHTNESS D74 D ALM A LED DRIVE Q53, ALM B KS0 KS , 8 D70 73 (LCD BACK LIGHT) 1 KR0 KR D60, 61 HIGH LOW B+ RESET 18 D BZ-CTRL 36 BUZZER 33 MUTE PDET PDET I Power failure detection input terminal L : power failure 29 to 31 PI0 to PI2 I Destination setting terminal *1 32 TEST I Test mode input terminal L : test mode Not used (open) 33 MUTE O Muting on/off control signal output terminal L : muting on 34 CE O PLL serial chip enable signal output to the FM/AM PLL (IC50) 35 BZ-CTRL O Buzzer control signal output terminal H output at alarm B active 36 BUZZER O Beep sound (2 khz) drive signal output to the CXA1019M (IC1) 37 to 60 S23 to S0 O Segment drive signal output to the liquid crystal display (LCD100) 61 to 64 COM0 to COM3 O Common drive signal output to the liquid crystal display (LCD100) *1 ICF-C793 ICF-C793L US, Canadian AEP, Singapore Australian French UK PI0 H H H H L PI1 (pin #º) H L H L H PI2 (pin # ) H H L L H 05 X MHz X kHz LIQUID CRYSTAL DISPLAY LCD100 LCD REFERENCE VOLTAGE GENERATOR IC102 (SUFFIX 11) S101, (KEY MATRIX) RESET SIGNAL GENERATOR IC101 BACKUP B+ (SYSTEM CONTROLLER IC100 B+) D100 B+ D101 REGULATOR Q57 RECT D T301 POWER TRANSFORMER AC IN VT B+ RECT D

27 ICF-C793/C793L 5-3. SCHEMATIC DIAGRAM IC Block Diagrams MAIN board IC1 CXA1019M FM/AM IF OUT FE GND FM RF IN NC AM RF IN FM RF REG OUT FM OSC AFC AM OSC VOL NF FM DISCRI GND Waveforms MAIN board 1 IC50 2 (X IN) 1 V/DIV, 10 µs/div FM FE 1.9 Vp-p FM IF FM DISCRIMINATOR AM FE AF POWER AMP TUNING METER AM IF DET AGC µs 2 IC100!ª (XT1) 1 V/DIV, 20 µs/div FM/AM BAND SELECT IC50 AM IF IN FM IF IN NC BU2614FS METER IF GND AFC AGC AFC AGC DET OUT AF IN RIPPLE FILTER VCC AF OUT GND 2 Vp-p VSS PD1 VDD1 VDD2 FM IN AM IN P2 IF-IN PHASE DETECT MAIN CONTROL PRESCALLER IF COUNTER 30.5 µs I/O CONTROL REGISTER OUTPUT CONTROL *3 (X1) 1 V/DIV, 500 ms/div XOUT XIN CE CK DA CD P0 8 P1 2 Vp-p 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. Note: The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Note: Les composants identifiés par une marque! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. U : B+ Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : AM (MW/LW) 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 (MW/LW) Abbreviation AUS : Australian model CND : Canadian model FR : French model SP : Singapore model -11 : Suffix : Suffix ns *Note: Press either [+] or [ ] key when RADIO is being operated, oscillation will be given out for 250 ms. Oscillation will be given out for 250 ms when the power is turned on

28

29

30 NOTE: -XX and -X mean standardized parts, so they may have some difference from the original one. Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE)... (RED) Abbreviation AUS : Australian model CND : Canadian model FR : French model SP : Singapore model Parts Color Cabinet's Color (1) CABINET SECTION SECTION 6 EXPLODED VIEWS Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. The mechanical parts with no reference number in the exploded views are not supplied. Accessories and packing materials are given in the last of the electrical parts list. The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque! sont critiquens pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. 1 6 T301 5 SP not supplied 9 10 AEP, FR, SP 3 8 US, CND 7 UK AUS 2 1 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark SCREW +P 3X14 TYPE2 NON-SLIT FOOT 3 X CABINET (FRONT) SUB ASSY (C793: AEP, SP, AUS) 3 X CABINET ASSY (C793: US, CND) 3 X CABINET ASSY BUTTON (DST) * TRANSFORMER BOARD CABINET (REAR) BUTTON (ALARM) PANEL (ALARM) KNOB (BRIGHTNESS)! CORD, POWER (C793: AEP, SP/C793L: FR)! CORD, POWER (C793L: UK)! CORD, POWER (C793: US, CND)! CORD, POWER (C793: AUS) SP SPEAKER (6.6cm)! T TRANSFORMER, POWER (C793: US, CND)! T TRANSFORMER, POWER (C793: AEP, SP, AUS/C793L) 19

31 (2) CHASSIS SECTION not supplied LCD not supplied ANT1 59 L1 51 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * ALARM KEY BOARD HOLDER (LCD) 53 A A MAIN BOARD, COMPLETE (C793: US, CND) 53 A A MAIN BOARD, COMPLETE (C793: AUS) 53 A A MAIN BOARD, COMPLETE (C793: AEP, SP) 53 A A MAIN BOARD, COMPLETE (C793L: FR) 53 A A MAIN BOARD, COMPLETE (C793L: UK) SCREW +P 3X14 TYPE2 NON-SLIT BUTTON (MAIN) * MAIN KEY BOARD CHASSIS KNOB (VOL) HOLDER, FERRITE-ROD ANTENNA L ANTENNA, FERRITE-ROD (AM) (C793) L ANTENNA, FERRITE-ROD (LW/MW) LCD DISPLAY PANEL, LIQUID CRYSTAL ANT ANTENNA, FM WIRE (FM LEAD ANTENNA) 20

32 SECTION 7 ELECTRICAL PARTS LIST ALARM KEY MAIN NOTE: Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. -XX and -X mean standardized parts, so they may have some difference from the original one. RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable Abbreviation AUS : Australian model CND : Canadian model FR SP : French model : Singapore model -11 : Suffix : Suffix-12 Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. SEMICONDUCTORS In each case, u: µ, for example: ua.. : µa.. upa.. : µpa.. upb.. : µpb.. upc.. : µpc.. upd.. : µpd.. CAPACITORS uf: µf COILS uh: µh The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque! sont critiquens pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. When indicating parts by reference number, please include the board. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * ALARM KEY BOARD **************** < SWITCH > C ELECT 4.7uF 20% 50V C ELECT 10uF 20% 50V C CERAMIC CHIP 0.022uF 10% 50V C CERAMIC CHIP 0.1uF 10% 25V S SWITCH, KEYBOARD (, ALARM TIME) S SWITCH, KEYBOARD (+, ALARM TIME) S SWITCH, KEYBOARD (B, ON/OFF) S SWITCH, KEYBOARD (, ALARM TIME) S SWITCH, KEYBOARD (+, ALARM TIME) S SWITCH, KEYBOARD (A, ON/OFF) ************************************************************* A A MAIN BOARD, COMPLETE (C793: US, CND) A A MAIN BOARD, COMPLETE (C793: AUS) A A MAIN BOARD, COMPLETE (C793: AEP, SP) A A MAIN BOARD, COMPLETE (C793L: FR) A A MAIN BOARD, COMPLETE (C793L: UK) ********************* HOLDER (LCD) < ANTENNA > ANT ANTENNA, FM WIRE (FM LEAD ANTENNA) < BAND PASS FILTER > BPF FILTER, BAND PASS < CAPACITOR > C CERAMIC CHIP 120PF 5% 50V C CERAMIC CHIP 100PF 5% 50V C CERAMIC CHIP 0.001uF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 7PF 0.25PF 50V C CERAMIC CHIP 0.001uF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 100PF 5% 50V (C793: US, CND) C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.033uF 10% 25V C ELECT 10uF 20% 50V C CERAMIC CHIP 2PF 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 10PF 0.5PF 50V (C793) C CERAMIC CHIP 12PF 5% 50V C ELECT 1uF 20% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 430PF 5% 50V C CERAMIC CHIP 0.033uF 10% 25V C CERAMIC CHIP 10PF 0.5PF 50V C ELECT 220uF 20% 10V C ELECT 22uF 20% 25V C CERAMIC CHIP 1uF 10% 10V C CERAMIC CHIP 1uF 10% 10V C ELECT 220uF 20% 10V C CERAMIC CHIP 330PF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.1uF 10% 25V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.001uF 10% 50V C CERAMIC CHIP 0.33uF 10% 16V C CERAMIC CHIP 220PF 5% 50V C ELECT 470uF 20% 6.3V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.22uF 10% 16V C CERAMIC CHIP 15PF 5% 50V C CERAMIC CHIP 15PF 5% 50V C ELECT 220uF 20% 10V C CERAMIC CHIP 220PF 5% 50V C CERAMIC CHIP 0.22uF 10% 16V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 0.1uF 10% 25V 21

33 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C DOUBLE LAYER 0.022F 5.5V < IC > C CERAMIC CHIP 22PF 5% 50V C CERAMIC CHIP 22PF 5% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 470PF 5% 50V C CERAMIC CHIP 0.001uF 10% 50V C CERAMIC CHIP 0.1uF 25V C ELECT 2200uF 20% 10V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C CERAMIC CHIP 0.01uF 10% 50V C ELECT 220uF 20% 25V < FILTER > * CF FILTER, CERAMIC (450kHz) (C793) CF FILTER, CRYSTAL (450kHz) CF FILTER, CERAMIC (10.7MHz) CF FILTER, CERAMIC (10.7MHz) < CONNECTOR > * CN SOCKET, CONNECTOR 5P < DIODE > D DIODE SVC354S-TR D DIODE 1T362 D DIODE 1T362 D DIODE SVC347S-TL (C793) D DIODE 1SS120RX (C793: US, CND) D DIODE 1SS120RX (C793: US, CND) D DIODE DTZ5.1B D DIODE 1SS355TE-17 D DIODE 1SS355TE-17 D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED GL-3EG43 (LCD BACK LIGHT) D LED TLYE262A (K51.SOY.P) (A RADIO, LCD BACK LIGHT) D LED TLYE262A (K51.SOY.P) (B BUZZER, LCD BACK LIGHT) D DIODE 1SS120RX D DIODE 1SS355TE-17 D DIODE 1SS355TE-17 D DIODE 1N4002L D DIODE 1N4002L D DIODE 1N4002L D DIODE 1N4002L D DIODE 1SS120RX IC IC CXA1019M IC IC BU2614FS IC IC upd753106gc-053-ab8 IC IC S-80820ALUP-EAH-T2 IC IC S-81230AG-RB (-12) < SHORT > JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 (C793: US, CND) JC SHORT 0 (C793: US, CND) JC SHORT 0 JC SHORT 0 JC SHORT 0 (C793: AUS/C793L: FR) JC SHORT 0 (C793: AEP, SP/C793L: FR) JC SHORT 0 (C793L: UK) JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 JC SHORT 0 (C793: US, CND) JC SHORT 0 (-12) < COIL > L COIL, AIR-CORE 22

34 MAIN MAIN KEY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark L COIL, AIR-CORE L COIL (OSC) LCD < LIQUID CRYSTAL DISPLAY > DISPLAY PANEL, LIQUID CRYSTAL < IC LINK > PS LINK, IC (C793: AEP, SP, AUS/C793L) < TRANSISTOR > R METAL CHIP 150 5% 1/10W R METAL CHIP 150 5% 1/10W R METAL CHIP 150 5% 1/10W R RES, CHIP 220 5% 1/8W R RES, CHIP 220 5% 1/8W R METAL CHIP 470 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W Q TRANSISTOR 2SC2223-F13 Q TRANSISTOR 2SC2223-F13 Q TRANSISTOR 2SA1162-G Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SA1162-G Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SC1623-L5L6 Q TRANSISTOR 2SD400-E < RESISTOR > R METAL CHIP 3.3M 5% 1/10W R RES, CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 330 5% 1/10W R RES, CHIP 1K 5% 1/10W R METAL CHIP 22K 5% 1/10W R RES, CHIP 100K 5% 1/10W R RES, CHIP 1M 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 47 5% 1/10W R METAL CHIP 3.3K 5% 1/10W (C793: US, CND) R RES, CHIP 4.7K 5% 1/10W (C793: AEP, SP, AUS/C793L) R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 8.2K 5% 1/10W R RES, CHIP 1K 5% 1/8W R METAL CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 220 5% 1/10W R RES, CHIP 1K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 10K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 47 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 1K 5% 1/8W R RES, CHIP 47 5% 1/10W R METAL CHIP 150 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 100K 5% 1/10W R METAL CHIP 330K 5% 1/10W R RES, CHIP 4.7K 5% 1/8W R RES, CHIP 4.7K 5% 1/8W R RES, CHIP 4.7K 5% 1/10W R RES, CHIP 100K 5% 1/8W R METAL CHIP 10 5% 1/10W R METAL CHIP 22K 5% 1/10W R METAL CHIP 10K 5% 1/10W (-11) R METAL CHIP 2.2K 5% 1/10W R METAL CHIP 10K 5% 1/10W R RES, CHIP 10K 10% 1/8W R RES, CHIP 1K 5% 1/8W < SWITCH > S SWITCH, SLIDE (BRIGHTNESS) S SWITCH, KEY BOARD (D. S. T./SUMMER T. ) < TRANSFORMER > T TRANSFORMER, IF < VARIABLE CAPACITOR > TC CAP, ADJ 10PF TC CAP, ADJ 40PF TC CAP, ADJ 10PF TC CAP, ADJ 40PF < VARIABLE RESISTOR > VR RES, VAR, CARBON 50K (VOL) < VIBRATOR > X VIBRATOR, CRYSTAL (75kHz) X VIBRATOR, CRYSTAL (32.768kHz) X VIBRATOR, CERAMIC (4.19MHz) ************************************************************ * MAIN KEY BOARD *************** < SWITCH > S SWITCH, KEYBOARD (1, WAKE UP STATION) S SWITCH, KEYBOARD (ALARM RESET, RADIO OFF) S SWITCH, KEYBOARD (BAND) S SWITCH, KEYBOARD (5) 23

35 ICF-C793/C793L MAIN KEY TRANSFORMER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark S SWITCH, KEYBOARD (SLEEP, RADIO ON) S SWITCH, KEYBOARD (CLOCK) S SWITCH, KEYBOARD (+, TUNE/TIME SET) S SWITCH, KEYBOARD (, TUNE/TIME SET) S SWITCH, KEYBOARD (3) S SWITCH, KEYBOARD (4) S SWITCH, KEYBOARD (SNOOZE/DATE/SLEEP OFF) S SWITCH, KEYBOARD (2) ************************************************************* * TRANSFORMER BOARD ******************* * TERMINAL (C793: AEP, AUS/C793L) < CONNECTOR > * CN PIN, CONNECTOR (SMALL TYPE) 4P < TRANSFORMER >!T TRANSFORMER, POWER (C793: US, CND)!T TRANSFORMER, POWER (C793: AEP, SP, AUS/C793L) ************************************************************ MISCELLANEOUS **************! CORD, POWER (C793: AEP, SP/C793L: FR)! CORD, POWER (C793L: UK)! CORD, POWER (C793: US, CND)! CORD, POWER (C793: AUS) L ANTENNA, FERRITE-ROD (AM) (C793) L ANTENNA, FERRITE-ROD (LW/MW) SP SPEAKER (6.6cm) ************************************************************ ACCESSORIES & PACKING MATERIALS ******************************* MANUAL, INSTRUCTION (ENGLISH, FRENCH, GERMAN, DUTCH) (C793: CND, AEP, SP, AUS/C793L) MANUAL, INSTRUCTION (ENGLISH) (C793: US) MANUAL, INSTRUCTION (ENGLISH, ITALIAN, SPANISH, PORTUGUESE) (C793: AEP/C793L: FR) MANUAL, INSTRUCTION (ENGLISH, SWEDISH, DANISH, FINNISH) (C793: AEP) The components identified by mark! or dotted line with mark! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque! sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié Sony Corporation Personal Audio Company 24 99F Printed in Japan Published by General Engineering Dept.