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Sony ICF-C121 Service Manual

Fm/am clock radio
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ICF-C121
SERVICE MANUAL
US Model
Canadian Model
Ver 1.2 1999. 11
E Model
With SUPPLEMENT-1
(9-925-799-81)
With SUPPLEMENT-2
(9-925-799-82)
SPECIFICATIONS
FEATURES
FM/AM CLOCK RADIO
MICROFILM

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  Summary of Contents for Sony ICF-C121

  • Page 1 ICF-C121 SERVICE MANUAL US Model Canadian Model Ver 1.2 1999. 11 E Model With SUPPLEMENT-1 (9-925-799-81) With SUPPLEMENT-2 (9-925-799-82) SPECIFICATIONS FEATURES FM/AM CLOCK RADIO MICROFILM...
  • Page 2: Section 1 Servicing Notes

    DE FONCTIONNEMENT. NE REMPLACER CES COM- SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- POSANTS QUE PAR DES PIÈCES SONY DONT LES LISHED BY SONY. NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
  • Page 3: Section 2 General

    SECTION 2 This section is extracted from instruction manual. GENERAL – 3 –...
  • Page 4: Section 3 Dial Pointer Setting

    SECTION 3 DIAL POINTER SETTING Note: Follow the assembly procedure in the numerical order given. 7 Turn CV1 and RV1 shaft in the arrow direction fully. 8 RADIO board 2 Set the pointer to the guide line. RADIO board (Conductor Side) 3 chassis screw (P3 ×...
  • Page 5: Section 4 Electrical Adjustments

    SECTION 4 ELECTRICAL ADJUSTMENTS [FM] • Adjusting Location: RADIO board (Component Side) Setting: L1: AM TRACKING CT3:FM TRACKING BAND switch: FM ADJUSTMENT ADJUSTMENT FM RF SSG level meter T1:AM IF CT1:AM TRACKING ADJUSTMENT ADJUSTMENT 0.01 µ F – ± 22.5 kHz frequency speaker terminal deviation by 400 Hz signal...
  • Page 6 ICF-C121 SECTION 5 DIAGRAMS 5-1. PRINTED WIRING BOARDS • Semiconductor Location Ref. No. Location D101 D201 D202 D203 D204 D205 IC101 LED101 Q201 Q202 Note on Printed Wiring Boards: • X : parts extracted from the component side. • Y : parts extracted from the conductor side.
  • Page 7 ICF-C121 5-2. SCHEMATIC DIAGRAM • IC Block Diagram IC1 CXA1019S Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF • U : B+ Line. 50 WV or less are not indicated except for electrolytics •...
  • Page 8: Section 6 Exploded View

    SECTION 7 SECTION 6 RADIO EXPLODED VIEW ELECTRICAL PARTS LIST NOTE: NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by • Due to standardization, replacements in the •...
  • Page 9: Metal Chip

    RADIO Ref. No. Part No. Description Remark 1-216-057-00 METAL CHIP 2.2K 1/10W R101 1-216-105-00 METAL GLAZE 220K 1/10W R102 1-216-097-00 METAL GLAZE 100K 1/10W R103 1-216-097-00 METAL GLAZE 100K 1/10W R104 1-216-089-00 METAL GLAZE 1/10W R105 1-216-081-00 METAL CHIP 1/10W R204 1-216-009-00 METAL CHIP 1/10W...
  • Page 10 ICF-C121 Sony Corporation 98B0531-1 9-925-799-11 Personal & Mobile Communication Company Printed in Japan © 1998. 2 – 14 – Published by Quality Assurance Dept.
  • Page 11 ICF-C121 US Model Canadian Model SERVICE MANUAL E Model 1999. 06 SUPPLEMENT-1 File this supplement with the service manual. Subject: 1. Addition of Black Model (Canadian Model) 2. Correction (ENG-99004) 1. ADDITION OF BLACK MODEL (Canadian Model) Page Before change After change Ref.
  • Page 12: Electrical Parts List

    ! are critical for safety. sécurité. Replace only with part number Ne les remplacer que par une pièce specified. portant le numéro spécifié. Sony Corporation 99F05042-1D 9-925-799-81 Personal Audio Company Printed in Japan © 1999. 6 – 2 –...
  • Page 13 ICF-C121 US Model Canadian Model SERVICE MANUAL E Model 1999. 11 SUPPLEMENT-2 File this supplement with the service manual. Subject: Addition of Parts (US model only) (Serial No. 1,544,651 and later) (ECN-801622) • DISCRIMINATION – Specification Label – Former Type...
  • Page 14 • PRINTED WIRING BOARD : Changed portion. Page Former Type New Type Location C-G, 1-3 View A • View A Bond SHIELD CASE SOLDER – 2 –...
  • Page 15 • SCHEMATIC DIAGRAM : Changed portion. Page Former Type New Type Location C-G, 5-8 – 3 –...
  • Page 16 ICF-C121 • EXPLODED VIEW Page Before Change After Change Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3679-957-A RADIO BOARD, COMPLETE A-3679-957-A RADIO BOARD, COMPLETE (EXCEPT US) A-3683-137-A RADIO BOARD, COMPLETE (US) • ELECTRICAL PARTS LIST...