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Sony ICF-CD873L Service Manual

Fm/mw/lw cd clock radio
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Download this manual See also: Operating Instructions
SERVICE MANUAL
Ver 1.2 2002.11
Sony Corporation
9-927-129-12
2002K0500-1
Personal Audio Company
C 2002.11
Published by Sony Engineering Corporation
ICF-CD873L
Model Name Using Similar Mechanism
Optical Device Name
Optical Pick-UP Name
SPECIFICATIONS
Supplied accessories:
Instruction manual (1)
FM/MW/LW CD CLOCK RADIO
AEP Model
UK Model
CFD-550
KSM-213BAN
KSS-213B

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Summary of Contents for Sony ICF-CD873L

  • Page 1 Ver 1.2 2002.11 Model Name Using Similar Mechanism CFD-550 Optical Device Name KSM-213BAN Optical Pick-UP Name KSS-213B SPECIFICATIONS Supplied accessories: Instruction manual (1) FM/MW/LW CD CLOCK RADIO Sony Corporation 9-927-129-12 2002K0500-1 Personal Audio Company C 2002.11 Published by Sony Engineering Corporation...

  • Page 2: Table Of Contents

    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.

  • Page 3: Servicing Notes

    SECTION 1 SERVICING NOTES HOW TO CHANGED THE CERAMIC FILTERS NOTES ON HANDLING THE OPTICAL PICK-UP This model is used two ceramic filters of CF2 and CF3. BLOCK OR BASE UNIT You must used same type of color marked ceramic filters in order The laser diode in the optical pick-up block may suffer electro- to meet same specifications.

  • Page 4: General

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

  • Page 5: 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 (CN303, 304) 4 connector...
  • Page 6 MAIN BOARD SECTION 4 Open the CD lid. 3 Pull the button (open). 5 screw (B3 × 10) 1 twelve claws 7 flat wire (CN301) 7 flat wire (CN402) 2 net assy 8 main board section 1 two claws 6 four screws 6 three screws (P3 ×...

  • Page 7: 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 – 7 –...

  • Page 8: Electrical Adjustments

    SECTION 5 ELECTRICAL ADJUSTMENTS AM IF ADJUSTMENT TUNER SECTION 0 dB=1 µV Adjust for a maximum reading on level meter [MW/LW] 450 kHz Setting: Function : RADIO MW FREQUENCY COVERAGE ADJUSTMENT Band switch : MW or LW Adjustment Part Frequency Display Reading on Digital Voltmeter Put the lead-wire AM RF signal 531 kHz...

  • Page 9: 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 10 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 11: Main Clock Section

    MAIN CLOCK SECTION Main Clock Adjustment Connection: adjustment frequency counter MAIN board TP (+5 V) TP401 (X2) 10 : 1 probe – TP GND (SHIELD) Adjustment jig: 100 k Ω 100 k Ω +5 V 1 M Ω 1000 pF 0.5 pF 1 M Ω...
  • Page 12 Adjustment Location and Connecting Points: L3-2 LW Tracking Adjustment RV502 Focus Gain Adjustment RV501 Focus Bias Adjustment – MAIN BOARD (Component Side) – MW Tracking Adjustment L3-1 L4 MW Frequency Coverage Adjustment CT4 LW Frequency Coverage Adjustment FM Tracking Adjustment RV1 FM VCO Adjustment T1 AM IF Adjustment L2 FM Frequency Coverage...

  • Page 13: Diagrams

    ICF-CD873L 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 14: Block Diagram - Tuner Section

    ICF-CD873L 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/AM FM RF L-CH OUT TUNER L-CH 10.7MHz FE OUT B.P.F. IF IN FM IF AMP/ DECODER R-CH OUT...

  • Page 15: Block Diagram - Main Section

    ICF-CD873L 6-3. BLOCK DIAGRAM – MAIN Section – • SIGNAL PATH MAIN BOARD (3/3) VOLUME BOARD POWER BOARD : CD PLAY POWER AMP CD/TUNER SELECT SWITCH (FOR FRONT SPEAKER/HEADPHONE) CN301 CN302 CN302 CN301 CN304 : TUNER (FM/MW/LW) IC350 IC320 (1/2)

  • Page 16: Printed Wiring Boards – Main Section

    ICF-CD873L 6-4. PRINTED WIRING BOARDS – MAIN Section – • Circuit Boards Location • Semiconductor Location Ref. No. Location Ref. No. Location K-12 IC301 VOLUME board I-12 IC320 I-12 IC401 K-12 IC402 I-10 D320 IC501 MOTOR board IC502 D321 HEADPHONE board...

  • Page 17: Schematic Diagram - Main Section

    ICF-CD873L 6-5. SCHEMATIC DIAGRAM – MAIN Section – • • See page 29 for Waveforms. See page 35 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 18: Schematic Diagram - Power Supply Section

    ICF-CD873L 6-6. SCHEMATIC DIAGRAM – POWER SUPPLY Section – • See page 38 for IC Block Diagrams. • Waveforms – MAIN Board – 6 IC501 #¡ (RF O), IC502 #§ (RF) !¡ IC50 1 (XOUT) (RADIO ON mode) 1 IC401 %• (X1) (RADIO ON mode) (CD PLAY mode) 500 mV/DIV, 10 µs/DIV...
  • Page 20 • 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 BLEND INDICATOR MONO/STEREO MUTING...
  • Page 21 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 22 – POWER Board – IC350 LA4601N POP NOISE REFERENCE PREVENTION PROTECTOR CIRCUIT OUTPUT INPUT DRIVE AMP OUTPUT INPUT DRIVE AMP STANDBY RIPPLE SWITCH FILTER IC351 BA5417 T.S.D. – – STANDBY FILTER 3 4 5 11 12 14 15 – 38 –...

  • Page 23: 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 24 Pin No. Pin Name Description — Internal connection terminal (connected to power supply) Main system clock input terminal (4.194 MHz) Main system clock output terminal (4.194 MHz) SHIFT CK Shift clock output of the main system clock (4.194 MHz) “H” active COLOR LCD back light color selection signal output terminal “L”: amber, “H”: green DOOR-IN...

  • Page 25: Exploded Views

    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 ! or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 26 (2) MAIN BOARD SECTION supplied LCD401 LCD401 ANT1 main board KSM-213BAN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-673-804-11 MOTOR BOARD * 60 A-3683-099-A MAIN BOARD, COMPLETE (AEP) 3-921-725-01 SCREW (2.6X10), +PWH * 60 A-3683-100-A MAIN BOARD, COMPLETE (UK) 3-910-095-31 RUBBER, VIBRATION PROOF (GREEN) 1-769-824-11 WIRE (FLAT TYPE) (16 CORE)
  • Page 27 (3) LOWER CABINET SECTION SP301 T901 power board The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 101...
  • Page 28 (4) OPTICAL PICK-UP SECTION (KSM-213BAN) not supplied M571 M570 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ! 151...
  • Page 29 HEADPHONE SECTION 8 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 30 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3683-099-A MAIN BOARD, COMPLETE (AEP) 1-163-251-11 CERAMIC CHIP 100PF A-3683-100-A MAIN BOARD, COMPLETE (UK) 1-163-009-11 CERAMIC CHIP 0.001uF 1-163-251-11 CERAMIC CHIP 100PF ********************* (Including LED/PUSH SWITCH BOARD) C101 1-163-243-11 CERAMIC CHIP 47PF...
  • Page 31 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C470 1-163-251-11 CERAMIC CHIP 100PF C554 1-163-009-11 CERAMIC CHIP 0.001uF C555 1-163-037-11 CERAMIC CHIP 0.022uF C471 1-163-251-11 CERAMIC CHIP 100PF C556 1-163-038-00 CERAMIC CHIP 0.1uF C472 1-163-251-11 CERAMIC CHIP 100PF C557 1-163-038-00 CERAMIC CHIP...
  • Page 32 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < IC > 1-216-121-00 RES, CHIP 1/10W 8-752-062-48 IC CXA1238M-T6 1-216-065-00 RES, CHIP 4.7K 1/10W IC50 8-759-188-85 IC BU2614FS 1-216-121-00 RES, CHIP 1/10W IC301 8-759-909-71 IC BA4558F 1-216-097-00 RES, CHIP 100K 1/10W...
  • Page 33 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R323 1-216-049-11 RES, CHIP 1/10W R324 1-216-073-00 METAL CHIP 1/10W R459 1-216-049-11 RES, CHIP 1/10W R325 1-216-049-11 RES, CHIP 1/10W R460 1-216-049-11 RES, CHIP 1/10W R461 1-216-049-11 RES, CHIP 1/10W R401 1-216-049-11 RES, CHIP...
  • Page 34 MAIN MOTOR POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R537 1-216-089-00 RES, CHIP 1/10W < CAPACITOR > R538 1-216-089-00 RES, CHIP 1/10W R539 1-216-097-00 RES, CHIP 100K 1/10W C150 1-163-019-00 CERAMIC CHIP 0.0068uF 10% C151 1-126-963-11 ELECT 4.7uF...
  • Page 35 POWER PUSH SWITCH VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * CN304 1-580-189-11 SOCKET, CONNECTOR 10P R252 1-216-057-00 METAL CHIP 2.2K 1/10W * CN305 1-568-272-11 SOCKET, CONNECTOR 6P R253 1-216-298-00 METAL CHIP 1/10W * CN306 1-564-720-11 PIN, CONNECTOR (SMALL TYPE) 4P R254 1-216-049-11 RES, CHIP...
  • Page 36 Ver 1.1 VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VARIABLE RESISTOR > RV301 1-240-871-11 RES, VAR, CARBON 20K (VOLUME) RV302 1-240-870-11 RES, VAR, CARBON 20K (MEGA BASS) ************************************************************** MISCELLANEOUS ************** 1-790-755-11 WIRE (FLAT TYPE) (7 CORE) 1-452-732-11 MAGNET 1-790-756-11 WIRE (FLAT TYPE) (10 CORE) 1-769-824-11 WIRE (FLAT TYPE) (16 CORE)
  • Page 37 ICF-CD873L AEP Model UK Model SERVICE MANUAL Ver 1.2 2002.11 SUPPLEMENT-1 Subject: Printed Wiring Boards and Mechanism Parts Modification Accompanying Power Transformer (T901) Modification (ECN-TRA00668) • NEW/FORMER TYPE DISCRIMINATION – POWER BOARD (Component Side) – Former type: 1-673-799-11, -12, -13...
  • Page 38 ICF-CD873L DIAGRAMS 1-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Schematic Diagram: • Signal path. • All capacitors are in µF unless otherwise noted. pF: µµF : FM 50 WV or less are not indicated except for electrolytics : AM and tantalums.
  • Page 39 ICF-CD873L 1-2. PRINTED WIRING BOARDS – MAIN Section – • Semiconductor Location Ref. No. Location L-12 J-12 J-12 K-13 D320 D321 D401 H-11 MAIN BOARD (COMPONENT SIDE) VOLUME BOARD VOLUME BOARD D402 H-11 (COMPONENT SIDE) (CONDUCTOR SIDE) D403 H-12 D404...
  • Page 40 ICF-CD873L 1-3. SCHEMATIC DIAGRAM – MAIN Section (1/2) – (1/2) D422 SLR-342-MCT31 R486 D419 R483 D423 TLYE262A SLR-342-MCT31 R487 D420 R484 D424 LCD401 TLYE262A SLR-342-MCT31 R488 LIQUID CRYSTAL DISPLAY D421 R485 TLYE262A D422-424 (LCD BACK LIGHT) D419-421 R401 (LCD BACK LIGHT)
  • Page 41 ICF-CD873L 1-4. SCHEMATIC DIAGRAM – MAIN Section (2/2) – (2/2) (1/3) 0.01 ANT1 FM WIRE TP53 1000p 100k 100k ANTENNA (VT) MW/LW 470p L3-1 (MW) FERRITE-ROD 0.01 ANTENNA TP12 BPF1 (2/3) (3/3) 390p (FM IN) 120p 270p MW/LW OSC 470p 4.7k...
  • Page 42 ICF-CD873L 1-5. PRINTED WIRING BOARD – POWER SUPPLY Section – POWER BOARD (COMPONENT SIDE) POWER BOARD (CONDUCTOR SIDE) TM902 TM901 HEADPHONE BOARD (COMPONENT SIDE) AC IN LF901 (14) 1-673-801- T901 POWER TRANSFORMER HEADPHONE BOARD F901 (CONDUCTOR SIDE) C380 L380 J301...
  • Page 43 ICF-CD873L 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 44 ICF-CD873L EXPLODED VIEWS NOTE: (2) MAIN BOARD SECTION • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 45 ICF-CD873L (3) LOWER CABINET SECTION SP301 T901 power board The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 46: Electrical Parts List

    ICF-CD873L HEADPHONE MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by parts list may be different from the parts speci- are seldom required for routine service.
  • Page 47 ICF-CD873L MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-126-964-11 ELECT 10uF C432 1-126-935-11 ELECT 470uF 6.3V 1-126-963-11 ELECT 4.7uF C433 1-163-038-00 CERAMIC CHIP 0.1uF 1-163-009-11 CERAMIC CHIP 0.001uF C434 1-107-823-11 CERAMIC CHIP 0.47uF C435...
  • Page 48 ICF-CD873L MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C541 1-163-021-11 CERAMIC CHIP 0.01uF D404 8-719-074-44 DIODE 1SS120RX C542 1-164-489-11 CERAMIC CHIP 0.22uF D412 8-719-988-61 DIODE 1SS355TE-17 (UK) C543 1-163-021-11 CERAMIC CHIP 0.01uF D413 8-719-988-61 DIODE 1SS355TE-17 (AEP)
  • Page 49 ICF-CD873L MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q404 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R207 1-216-073-00 METAL CHIP 1/10W Q405 8-729-120-28 TRANSISTOR 2SC1623-L5L6 R208 1-216-073-00 METAL CHIP 1/10W Q406 8-729-027-31 TRANSISTOR DTA124EKA-T146 R209 1-216-057-00 METAL CHIP 2.2K...
  • Page 50 ICF-CD873L MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R447 1-216-113-00 METAL CHIP 470K 1/10W R521 1-216-081-00 METAL CHIP 1/10W R448 1-216-113-00 METAL CHIP 470K 1/10W R523 1-216-009-91 RES-CHIP 1/10W R524 1-216-089-00 RES-CHIP 1/10W R449...
  • Page 51 ICF-CD873L MOTOR POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-673-804-14 MOTOR BOARD C908 1-107-901-11 ELECT 0.47uF C909 1-107-909-11 ELECT 47uF ************* C910 1-163-021-11 CERAMIC CHIP 0.01uF < SWITCH > C911 1-128-547-11 ELECT 6800uF C912 1-163-021-11 CERAMIC CHIP 0.01uF...
  • Page 52 ICF-CD873L POWER PUSH SWITCH VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q901 8-729-021-82 TRANSISTOR 2SD2396K ************************************************************** Q902 8-729-021-82 TRANSISTOR 2SD2396K Q903 8-729-049-50 TRANSISTOR 2SB1424-T100-R Q904 8-729-027-31 TRANSISTOR DTA124EKA-T146 1-673-802-14 PUSH SWITCH BOARD ******************* < RESISTOR >...
  • Page 53 ICF-CD873L MEMO...
  • Page 54 ICF-CD873L 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 1999.05...

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