Sony ICF-CD820 Service Manual
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Sony ICF-CD820 Service Manual

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SERVICE MANUAL
MICROFILM
ICF-CD820/CD820L
SPECIFICATIONS
Canadian Model
Australian Model
Model Name Using Similar Mechanism
Optical Device Name
Optical Pick-UP Name
CD CLOCK RADIO
US Model
E Model
ICF-CD820
AEP Model
ICF-CD820/CD820L
UK Model
ICF-CD820L
CFD-550
KSM-213BAN
KSS-213B

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Summary of Contents for Sony ICF-CD820

  • Page 1 ICF-CD820/CD820L SERVICE MANUAL US Model Canadian Model E Model Australian Model ICF-CD820 AEP Model ICF-CD820/CD820L UK Model ICF-CD820L Model Name Using Similar Mechanism CFD-550 Optical Device Name KSM-213BAN Optical Pick-UP Name KSS-213B SPECIFICATIONS CD CLOCK RADIO MICROFILM...

  • 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 SAFETY CHECK-OUT NOTES ON HANDLING THE OPTICAL PICK-UP After correcting the original service problem, perform the follow- BLOCK OR BASE UNIT ing safety check before releasing the set to the customer: The laser diode in the optical pick-up block may suffer electro- Check the antenna terminals, metal trim, “metallized”...

  • Page 4: General

    SECTION 2 GENERAL LASER DIODE AND FOCUS SEARCH This section is extracted from OPERATION CHECK instruction manual. 1. Open the CD lid. 2. Turn on S420 as following figure. 3. Confirm that the laser diode emission while observing the ob- jecting lens.
  • Page 5 – 5 –...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. UPPER CABINET CD LID ASS’Y ASS’Y MAIN BOARD AND OPTICAL PICK-UP SECTION DIAL POINTER SETTING Note: Follow the disassembly procedure in the numerical order given. UPPER CABINET ASS’Y 2 Open the CD lid ass’y.
  • Page 7 CD LID ASS’Y 1 Open the CD lid ass’y. 5 CD lid ass’y 3 left hinge plate 2 CD lid spring 4 right hinge plate MAIN BOARD AND OPTICAL PICK-UP SECTION 3 screw 1 switch board (BTP3 × 10) 4 screw (PTP3 ×...
  • Page 8 DIAL POINTER SETTING Note: Follow the assembly procedure in the numerical order given. 3 Turn the shaft CV1 to 4 Set the MAIN board. the arrow direction from the pattern side perfectly (Fig. 3). (Fig. 3) 2 Fit A portion and fit a claw to the hole of axle side and catch in to pointer gear (Fig.

  • Page 9: Electrical Adjustments

    SECTION 4 ELECTRICAL ADJUSTMENTS PRECAUTION AM IF ADJUSTMENT • Adjustment should be performed in the order given. Adjust for a maximum reading on level meter TUNER SECTION 0 dB=1 µV 455 kHz AM (MW) FREQUENCY COVERAGE ADJUSTMENT [FM] (Except CD820L: FR) Setting: Adjust for a maximum reading on level meter Function switch: RADIO...
  • Page 10 FM STEREO Adjustment Connection: Procedure: MAIN Board frequency counter 33 k Ω FM RF SSG IC1 Pin 7 0.01 µ F IC1 Pin 4 – ’ ‘ Carrier frequency: 98 MHz Modulation: no modulation Output level: 0.032 V (90 dB) FM lead wire antenna terminal 1.

  • Page 11: Cd Section

    Focus Bias Adjustment CD SECTION This adjustment is to be done when the optical block is replaced. Note: Connection: Tracking Balance Adjustment and Tracking Gain Adjustment are oscilloscope done automatically in this set. (AC range) TEST MODE MAIN board 1. Set the open switch (S420) to the CLOSE position. TP (RF) 2.
  • Page 12 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.
  • Page 13 Adjustment Location: [MAIN Board] (Conductor Side) IC501 (FE) IC502 (VREF) TP (RF) IC401 TP (TEST) (GND) [MAIN Board] (Component Side) RV502 Focus Gain Adjustment RV501 Focus Bias Adjustment – 13 –...

  • Page 14: Diagrams

    SECTION 5 DIAGRAMS • Circuit Boards Location MOTOR board POWER board SWITCH board KEY board MAIN board JACK board (Except CD820: US, Canadian) – 14 –...
  • Page 17 • Waveforms 6 IC501 $¢ (TET) (PLAY MODE) 1 IC401 %ª (X2) 500 mV/DIV, 1 ms/DIV 500 mV/DIV, 100 ns/DIV Approx. 1.7 Vp-p 138 mVp-p 4.19 MHz 7 IC502 @£ (FOK) (PLAY MODE) 2 IC401 %• (X1) 50 mV/DIV, 2 ms/DIV 2 V/DIV, 100 ns/DIV Approx.
  • Page 18 !¡ IC502 ^¢ (WFCK) (PLAY MODE) 2 V/DIV, 100 µs/DIV 5 Vp-p 136 µ s – 25 –...
  • Page 19 • IC Block Diagrams – MAIN Board – IC1 CXA1238M-T6 – 26 –...
  • Page 20 IC501 CXA1782BQ – 27 –...
  • Page 21 IC502 CXD2508AQ – 28 –...

  • Page 22: 5-3. Ic Pin Function Description

    At normal mode: CD power on/off control signal output (power on when “L” output) Setting terminal for the time display (12/24-hour system) “L”: 12H, “H”: 24H ICF-CD820; US, Canadian, Australian models and ICF-CD820L; UK model: fixed at “L”, 12H/24H ICF-CD820; AEP, Italian, Singapore models and ICF-CD820L; AEP, French models: fixed at “H”...
  • Page 23 Pin No. Pin Name Function KEY IN4 Key input terminal RADIO SLEEP key input (S404) Key input terminal TIME SET/TRACK + + key input (S405) KEY IN5 Key input terminal ALARM A key input (S406) KEY IN6 Key input terminal CD ( P key input (S407) KEY IN7 Key input terminal TIME SET/TRACK –...

  • Page 24: Exploded Views

    SECTION 6 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 25 (2) CHASSIS SECTION AEP, FR, IT, SP US, Canadian T901 Except CD820: US, Canadian The components identified by Les composants identifiés par une mark ! or dotted line with marque ! sont critiques pour la mark ! are critical for safety. sécurité.
  • Page 26 (3) OPTICAL PICK-UP SECTION (KSM-213BAN) not supplied M572 M571 The components identified by Les composants identifiés par une mark ! or dotted line with marque ! sont critiques pour la mark ! are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
  • Page 27 SECTION 7 JACK 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 are seldom required for routine service. parts list may be different from the parts speci- ! are critical for safety.
  • Page 28 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-163-122-00 CERAMIC CHIP 160PF C331 1-126-963-11 ELECT 4.7uF (CD820L: AEP) (EXCEPT CD820: US, Canadian) 1-163-121-00 CERAMIC CHIP 150PF C350 1-163-031-11 CERAMIC CHIP 0.01uF (CD820L: UK) C351 1-126-933-11 ELECT 100uF C352 1-126-964-11 ELECT...
  • Page 29 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C524 1-163-809-11 CERAMIC CHIP 0.047uF C583 1-163-031-11 CERAMIC CHIP 0.01uF C525 1-163-031-11 CERAMIC CHIP 0.01uF C584 1-164-489-11 CERAMIC CHIP 0.22uF C526 1-163-227-11 CERAMIC CHIP 10PF 0.5PF C527 1-164-004-11 CERAMIC CHIP 0.1uF C901...
  • Page 30 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D902 8-719-031-85 DIODE 1N4002L < TRANSISTOR > D903 8-719-031-85 DIODE 1N4002L 8-729-119-78 TRANSISTOR 2SC403SP-51 D904 8-719-031-85 DIODE 1N4002L (CD820L: AEP, UK) D905 8-719-991-33 DIODE 1SS133T-77 8-729-119-78 TRANSISTOR 2SC403SP-51 D906 8-719-991-33 DIODE 1SS133T-77 (CD820L: AEP, UK)
  • Page 31 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R423 1-216-073-00 RES, CHIP 1/10W R152 1-216-081-00 METAL CHIP 1/10W (CD820: AEP, IT, SP/CD820L: AEP, FR) R153 1-216-009-00 METAL CHIP 1/10W R427 1-216-073-00 RES, CHIP 1/10W R154 1-216-298-00 METAL CHIP 1/10W R155...
  • Page 32 MAIN MOTOR POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R528 1-216-113-00 METAL CHIP 470K 1/10W < SWITCH > R529 1-216-097-00 RES, CHIP 100K 1/10W R530 1-216-113-00 METAL CHIP 470K 1/10W 1-692-181-21 SWITCH, SLIDE (BAND) (CD820/CD820L: FR) R531 1-216-095-00 METAL CHIP 1/10W...
  • Page 33 ICF-CD820/CD820L SWITCH Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-668-916-11 SWITCH BOARD (TYPE A) 1-668-916-12 SWITCH BOARD (TYPE B) ************* < SWITCH > S420 1-692-080-11 SWITCH, PUSH (1 KEY) (OPEN/CLOSE) ************************************************************ MISCELLANEOUS *************** 1-452-732-11 MAGNET...

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