Sony ICF-CD873 Service Manual
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Sony ICF-CD873 Service Manual

Sony ICF-CD873 Service Manual

Fm/am cd clock radio
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SERVICE MANUAL
Ver 1.3 2002.11
• Incorporation of Supplement-1
(Page 43, 44, 47, 53, 54)
Sony Corporation
9-927-109-12
2002K0500-1
Personal Audio Company
C 2002.11
Published by Sony Engineering Corporation
ICF-CD873
Model Name Using Similar Mechanism
Optical Device Name
Optical Pick-UP Name
SPECIFICATIONS
FM/AM CD CLOCK RADIO
US Model
Canadian Model
AEP Model
Australian Model
CFD-550
KSM-213BAN
KSS-213B

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  • Page 1 • Incorporation of Supplement-1 (Page 43, 44, 47, 53, 54) Model Name Using Similar Mechanism CFD-550 Optical Device Name KSM-213BAN Optical Pick-UP Name KSS-213B SPECIFICATIONS FM/AM CD CLOCK RADIO Sony Corporation 9-927-109-12 2002K0500-1 Personal Audio Company C 2002.11 Published by Sony Engineering Corporation...

  • Page 2: Table Of Contents

    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.
  • Page 3 MODEL IDENTIFICATION – Rear View – NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT ® MODEL NO. ICF-CD873 The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated MADE IN MALAYSIA by the charged electrostatic load, etc.

  • Page 4: General

    SECTION 2 This section is extracted from instruction manual. GENERAL – 4 –...
  • Page 5 – 5 –...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. Upper cabinet CD lid assy section Main board section Optical pick-up section Note: Follow the disassembly procedure in the numerical order given. UPPER CABINET SECTION 2 upper cabinet section 3 two flat wires (CN201, 202) 4 connector...
  • Page 7 MAIN BOARD SECTION 4 Open the CD lid. 5 screw 3 Pull the button (open). (B3 × 10) 1 twelve claws 8 flat wire (CN101) 8 flat wire (CN402) 2 net assy 7 main board section 1 two claws 6 four screws 6 three screws (P3 ×...

  • Page 8: Power Cord Setting

    SECTION 4 POWER CORD SETTING Set the power cord as illustrated below, then install the lower cabinet section. Power Cord lower cabinet section – 8 –...

  • Page 9: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS AM IF ADJUSTMENT TUNER SECTION 0 dB=1 µV Adjust for a maximum reading on level meter [AM] 450 kHz Setting: Function : RADIO AM FREQUENCY COVERAGE ADJUSTMENT Band switch : AM Adjustment Part Frequency Display Reading on Digital Voltmeter Put the lead-wire AM RF signal 530 kHz...

  • Page 10: Cd Section

    CD SECTION Focus Bias Adjustment This adjustment is to be done when the optical block is replaced. Note: Tracking Balance Adjustment and Tracking Gain Adjustment are Connection: done automatically in this set. oscilloscope (AC range) TEST MODE MAIN board 1. Press the CD LID OPEN/CLOSE DET switch (S424) on the PUSH SWITCH board.
  • Page 11 Focus Gain Adjustment Procedure: A frequency response analyzer is necessary in order to perform 1. Keep the set horizontal. this adjustment exactly. If the set is not horizontal, this adjustment cannot be per- However, this gain has a margin, so even if it is slightly off, there formed due to the gravity against the 2-axis device 2.

  • Page 12: Main Clock Section

    MAIN CLOCK SECTION Main Clock Adjustment Connection: adjustment frequency counter MAIN board TP (+5 V) TP401 (4.194 MHz) 10 : 1 probe – TP GND (SHIELD) Adjustment jig: 100 k Ω 100 k Ω +5 V 1 M Ω 1000 pF 0.5 pF 47 uF 1 M Ω...
  • Page 13 Adjustment Location and Connecting Points: AM Tracking Adjustment RV502 Focus Gain Adjustment RV501 Focus Bias Adjustment – MAIN BOARD (Component Side) – AM Frequency Coverage Adjustment FM Tracking Adjustment RV1 FM VCO Adjustment L2 FM Frequency Coverage Adjustment T1 AM IF Adjustment CT401 Main Clock Adjustment –...

  • Page 14: Diagrams

    ICF-CD873 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – CD Section – MAIN BOARD (1/3) FILTER DIGITAL SIGNAL PROCESSOR, MUTE CLV SERVO, D/A CONVERTER IC502 ERROR CN501 CORRECTOR PD1 I-V AMP LPWM CD L-CH PHD1 NLPWM PCMD PCMDI LOW-PASS FILTER DETECTOR...

  • Page 15: Block Diagram - Tuner Section

    ICF-CD873 6-2. BLOCK DIAGRAM – TUNER Section – MAIN BOARD (2/3) 10.7MHz ANT1 FM/AM FRONT-END, FM WIRE FM/AM DET, MPX ANTENNA FM RF FM/AM L-CH OUT TUNER L-CH 10.7MHz FE OUT IF IN B.P.F. FM IF AMP/ DECODER R-CH OUT...

  • Page 16: Block Diagram - Main Section

    ICF-CD873 6-3. BLOCK DIAGRAM – MAIN Section – VOLUME BOARD POWER BOARD MAIN BOARD (3/3) POWER AMP • SIGNAL PATH CD/TUNER SELECT SWITCH (FOR FRONT SPEAKER/HEADPHONE) CN301 CN301 CN302 CN302 CN304 IC320 IC350 CN306 (1/2) (1/2) (2/2) (2/2) (1/2) : CD PLAY...
  • Page 17 ICF-CD873 • Circuit Boards Location VOLUME board MOTOR board HEADPHONE board PUSH SWITCH board KEY board POWER board MAIN board LED board – 23 –...

  • Page 18: Printed Wiring Board - Main Section

    6-4. PRINTED WIRING BOARD – MAIN Section – • Semiconductor Location Ref. No. Location Ref. No. Location K-12 I-12 I-12 I-12 IC50 J-12 K-12 IC301 D320 IC320 D321 IC401 D401 H-11 IC402 I-10 IC501 D402 H-11 D403 H-12 IC502 D404 H-12 IC503 D405...

  • Page 19: Schematic Diagram - Main Section

    ICF-CD873 6-5. SCHEMATIC DIAGRAM – MAIN Section – • See page 31 for Waveforms. • See page 37 for IC Block Diagrams. 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.

  • Page 20: Schematic Diagram - Power Supply Section

    ICF-CD873 6-6. SCHEMATIC DIAGRAM – POWER SUPPLY Section – • See page 40 for IC Block Diagram. • Waveforms – MAIN Board – 1 IC601 2 (XT) (RADIO ON mode) 6 IC501 @º (XLT), IC502 !§ (XLT0) !¡ IC502 &£ (XTAI) (CD PLAY mode)
  • Page 21 ICF-CD873 6-7. PRINTED WIRING BOARD – POWER SUPPLY Section – • See page 23 for Circuit Boards Location. • Semiconductor Location Ref. No. Location D350 D351 D901 D902 D903 D904 D905 D906 D907 (11) D908 D909 D910 D911 IC350 IC351...
  • Page 22 ICF-CD873 • IC Block Diagrams IC501 CXA1782CQ – MAIN Board – IC1 CXA1238M-T6 27 26 25 FM FRONT-END AM FRONT-END REGULATOR LEVEL S FM IF/ DISCRI REGULATOR AM IF/ COUNTER MIRR SENS RF IV AMP1 DFCT COUNTER AUTO TUNING C.OUT...
  • Page 23 IC502 CXD2508AQ DIGITAL FILTER & 1 BIT D/A CONVERTER WFCK EMPHI EMPH DIGITAL DOUT CLOCK GENERATOR FSTT SCOR MNT0 SUB CODE SBSO MNT1 PROCESSOR EXCK MNT3 SQSO XROF SQCK C2PO MUTE SENS RFCK XRST DATA XPCK ERROR XLAT XUGF CORRECTOR CLOK GTOP BCKI...
  • Page 24 IC601 MSM6654A-542GS-KR1 (US model) AOUT BUSY TIMMING BEEP TONE CONTROLLER GENARATOR MELODY 12 BIT RESET GENARATOR INTERFACE SYNTHSIZER 17 BIT ADDRESS DATA ADPCM COUNTER CONTROLLER SYNTHESIZER 1M BIT ROM 17 BIT EDITING ROM & ADDRESS ROM MULTIPLEXER CONTAINS 22KBIT 16/SD ADDRESS 15/SI &...

  • Page 25: 6-8. Ic Pin Function Description

    6-8. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC401 µPD753012AGC-F17-3B9 (SYSTEM CONTROLLER) Pin No. Pin Name Description 1 to 10 SEG12 to SEG21 Segment drive signal output to the liquid crystal display (LCD401) 11, 12 SEG22, SEG23 Segment drive signal output terminal Not used (open) 13 to 16 KS0 to KS3 Key strobe signal output to the key matrix...
  • Page 26 Pin No. Pin Name Description A MUTE Audio line muting on/off selection signal output terminal “L”: muting on — Power supply terminal (+5V) Sub system clock input terminal (32.768 kHz) Sub system clock output terminal (32.768 kHz) — Internal connection terminal (connected to power supply) Main system clock input terminal (4.194MHz) Main system clock output terminal (4.194MHz) SHIFT CK...

  • Page 27: Exploded Views

    Ver 1.3 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 28 Ver 1.3 (2) MAIN BOARD SECTION supplied LCD401 ANT1 KSM-213BAN main board Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-673-804-11 MOTOR BOARD * 60 A-3683-095-A MAIN BOARD, COMPLETE (CND) 3-921-725-01 SCREW (2.6X10), +PWH * 60 A-3683-097-A MAIN BOARD, COMPLETE (AUS) 3-910-095-31 RUBBER, VIBRATION PROOF (GREEN)
  • Page 29 (3) LOWER CABINET SECTION US, CND SP301 T901 power board The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
  • Page 30 (4) OPTICAL PICK-UP SECTION (KSM-213BAN) not supplied M571 M570 The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.

  • Page 31: Electrical Parts List

    HEADPHONE SECTION 8 ELECTRICAL PARTS LIST Ver 1.3 NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark are seldom required for routine service. parts list may be different from the parts speci- ! are critical for safety.
  • Page 32 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-163-233-11 CERAMIC CHIP 18PF < RESISTOR > 1-163-251-11 CERAMIC CHIP 100PF R483 1-216-041-00 METAL CHIP 1/10W 1-163-251-11 CERAMIC CHIP 100PF R484 1-216-041-00 METAL CHIP 1/10W 1-163-251-11 CERAMIC CHIP 100PF R485 1-216-041-00 METAL CHIP...
  • Page 33 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C433 1-163-038-00 CERAMIC CHIP 0.1uF C541 1-163-021-11 CERAMIC CHIP 0.01uF C542 1-164-489-11 CERAMIC CHIP 0.22uF C434 1-107-823-11 CERAMIC CHIP 0.47uF C543 1-163-021-11 CERAMIC CHIP 0.01uF C435 1-124-584-00 ELECT 100uF C544 1-163-021-11 CERAMIC CHIP...
  • Page 34 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRIMMER > L302 1-216-295-00 SHORT 0 (EXCEPT US) 1-141-601-21 CAP, ADJ L401 1-410-526-11 INDUCTOR 10uH 1-141-601-21 CAP, ADJ L403 1-412-006-31 INDUCTOR 10uH CT401 1-141-601-21 CAP, ADJ L501 1-412-496-51 INDUCTOR 4.7uH...
  • Page 35 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-049-11 RES, CHIP 1/10W R414 1-216-073-00 METAL CHIP 1/10W 1-216-049-11 RES, CHIP 1/10W R415 1-216-049-11 RES, CHIP 1/10W 1-216-049-11 RES, CHIP 1/10W (US) 1-216-073-00 METAL CHIP 1/10W R416 1-216-049-11 RES, CHIP 1/10W...
  • Page 36 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R467 1-216-049-11 RES, CHIP 1/10W R468 1-216-049-11 RES, CHIP 1/10W R543 1-216-061-00 METAL CHIP 3.3K 1/10W R469 1-216-113-00 METAL CHIP 470K 1/10W R544 1-216-073-00 METAL CHIP 1/10W R470 1-216-049-11 RES, CHIP 1/10W...

  • Page 37: Limit) 7

    Ver 1.3 MAIN MOTOR POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark S423 1-571-478-11 SWITCH, SLIDE (BRIGHTNESS) (EXCEPT US) C364 1-110-501-11 CERAMIC CHIP 0.33uF < TRANSFORMER > C365 1-110-501-11 CERAMIC CHIP 0.33uF C366 1-110-501-11 CERAMIC CHIP 0.33uF 1-404-790-11 TRANSFORMER, IF C367...
  • Page 38 Ver 1.3 POWER PUSH SWITCH VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ! F901 1-532-237-00 FUSE (T3.15AL/250V) (IT, AUS) R366 1-216-053-00 METAL CHIP 1.5K 1/10W R369 1-216-073-00 METAL CHIP 1/10W < IC > R370 1-216-049-11 RES, CHIP 1/10W R371...
  • Page 39 Ver 1.2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark PACKING MATERIALS ****************** 3-866-485-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH, GERMAN, DUTCH) (CND, IT, AUS) 3-866-485-23 MANUAL, INSTRUCTION (ENGLISH) (US, AUS) 3-866-485-31 MANUAL, INSTRUCTION (SPANISH, SWEDISH, ITALIAN, PORTUGUESE) (IT) –...
  • Page 40 MEMO – 56 –...
  • Page 41 ICF-CD873 US Model Canadian Model SERVICE MANUAL AEP Model Australian Model 1999. 06 SUPPLEMENT-1 File this supplement with the service manual. Subject: 1. Addition of Parts 2. Correction of Parts (ENG-99008) 1. ADDITION OF PARTS • EXPLODED VIEW : Indicates added portion.
  • Page 42 1-673-800-12 VOLUME BOARD 1-673-800-11 VOLUME BOARD • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. Sony Corporation 99F0565-1 9-927-109-81 Personal Audio Company Printed in Japan © 1999. 6 –...
  • Page 43 ICF-CD873 US Model Canadian Model SERVICE MANUAL Italian Model Australian Model Ver 1.3 2002.11 SUPPLEMENT-2 Subject: Printed Wiring Boards and Mechanism Parts Modification Accompanying Power Transformer (T901) Modification (ECN-TRA00668) • NEW/FORMER TYPE DISCRIMINATION – POWER BOARD (Component Side) – Former : 1-673-799-11, -12, -13...
  • Page 44 ICF-CD873 DIAGRAMS 1-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Schematic Diagram: Note on Printed Wiring Boards: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF •...
  • Page 45 ICF-CD873 1-2. PRINTED WIRING BOARDS – MAIN Section – • Semiconductor Location Ref. No. Location L-12 J-12 J-13 K-13 D320 D321 MAIN BOARD (COMPONENT SIDE) D401 H-11 VOLUME BOARD VOLUME BOARD D402 H-11 (COMPONENT SIDE) (CONDUCTOR SIDE) D403 H-12 D404...
  • Page 46 ICF-CD873 1-3. SCHEMATIC DIAGRAM – MAIN Section (1/2) – (1/2) (EXCEPT US) D422 SLR-342-MCT31 R486 LCD401 D419 D423 LIQUID CRYSTAL DISPLAY TLYE262A SLR-342-MCT31 R415 R483 R487 D422-424 D420 D424 D417 (LCD BACK LIGHT) TLYE262A SLR-342-MCT31 (US) 1SS355-TE-17 R484 R488 D421...
  • Page 47 ICF-CD873 1-4. SCHEMATIC DIAGRAM – MAIN Section (2/2) – ANT1 FM WIRE (2/2) ANTENNA 100p TP53 (VT) AM FERRITE-ROD ANTENNA 0.01 TP12 0.01 AM OSC 470p 100k 100k (FM IN) 0.33 ∗ SVC347S-TL 390p 1000p 1000p 2.2k (US) BPF1 4.7k (EXCEPT US) 2.2k...
  • Page 48 ICF-CD873 1-5. PRINTED WIRING BOARDS – POWER SUPPLY Section – • Semiconductor Location Ref. No. Location POWER BOARD (COMPONENT SIDE) POWER BOARD (CONDUCTOR SIDE) D350 D351 (IT, AUS) (IT, AUS) D901 (US, CND) TM902 TM901 D902 HEADPHONE BOARD D903 (COMPONENT SIDE)
  • Page 49 ICF-CD873 1-6. SCHEMATIC DIAGRAM – POWER SUPPLY Section – R366 R365 C367 1.5k 0.47 VOL IN VOL OUT C369 C368 R364 R CH 0.47 0.47 4.7k L CH Q355 DTA124EKA Q150 2SC2412K Q354,355 R156 (Page 5) BASS ON SPEAKER POWER AMP...
  • Page 50 ICF-CD873 EXPLODED VIEWS NOTE: 2-2. MAIN BOARD SECTION • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 51 2-3. LOWER CABINET SECTION US, CND SP301 T901 power board The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
  • Page 52 ICF-CD873 HEADPHONE MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 53 ICF-CD873 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-126-947-11 ELECT 47uF C412 1-163-021-11 CERAMIC CHIP 0.01uF 1-163-021-11 CERAMIC CHIP 0.01uF C413 1-163-251-11 CERAMIC CHIP 100PF 1-163-021-11 CERAMIC CHIP 0.01uF C420 1-163-235-11 CERAMIC CHIP 22PF...
  • Page 54 ICF-CD873 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < FILTER > C530 1-164-004-11 CERAMIC CHIP 0.1uF C531 1-163-021-11 CERAMIC CHIP 0.01uF * CF1 1-577-319-11 FILTER, CERAMIC C532 1-163-009-11 CERAMIC CHIP 0.001uF 1-760-238-11 FILTER, CERAMIC...
  • Page 55 ICF-CD873 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-073-00 METAL CHIP 1/10W < COIL/SHORT > 1-216-105-00 RES-CHIP 220K 1/10W 1-406-545-11 COIL, AIR-CORE 1-216-057-00 METAL CHIP 2.2K 1/10W 1-406-546-11 COIL, AIR-CORE 1-216-057-00 METAL CHIP 2.2K...
  • Page 56 ICF-CD873 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R403 1-216-049-11 RES-CHIP 1/10W R456 1-216-049-11 RES-CHIP 1/10W R457 1-216-049-11 RES-CHIP 1/10W R404 1-216-049-11 RES-CHIP 1/10W R458 1-216-049-11 RES-CHIP 1/10W R405 1-216-049-11 RES-CHIP 1/10W R406 1-216-049-11 RES-CHIP...
  • Page 57 ICF-CD873 MAIN MOTOR POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R531 1-216-113-00 METAL CHIP 470K 1/10W R616 1-216-049-11 RES-CHIP 1/10W R532 1-216-097-00 RES-CHIP 100K 1/10W (US) R533 1-216-109-00 METAL CHIP 330K 1/10W R617 1-216-049-11 RES-CHIP...
  • Page 58 ICF-CD873 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C255 1-126-926-11 ELECT 1000uF D906 8-719-911-55 DIODE U05G (CND) C351 1-107-686-11 TANTALUM CHIP 4.7uF D906 8-719-979-32 DIODE RL202-M11 (EXCEPT CND) C352 1-126-963-11 ELECT 4.7uF C353 1-126-933-11 ELECT...
  • Page 59 ICF-CD873 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R354 1-216-097-00 RES-CHIP 100K 1/10W R355 1-216-073-00 METAL CHIP 1/10W R356 1-216-089-00 RES-CHIP 1/10W R357 1-216-073-00 METAL CHIP 1/10W R358 1-216-077-00 METAL CHIP 1/10W R359 1-216-033-00 METAL CHIP...
  • Page 60 ICF-CD873 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 1999.04...

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