Sony Walkman ICF-C121 Service Manual Download | Manualshive

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Summary of Contents for Walkman ICF-C121

Page 1: ...MICROFILM SERVICE MANUAL FM AM CLOCK RADIO US Model Canadian Model E Model SPECIFICATIONS ICF C121 FEATURES Ver 1 2 1999 11 With SUPPLEMENT 1 9 925 799 81 With SUPPLEMENT 2 9 925 799 82 ...

Page 2: ... 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 indica tion is 0 75 V so analog meters must have an accurate low voltage scale The Simpson 250 and Sanwa SH 63Trd are ex amples of a passive VOM that is suitable Nearly all battery operat...

Page 3: ... 3 SECTION 2 GENERAL This section is extracted from instruction manual ...

Page 4: ... 5 As shown in figure marking A of TUNE knob and marking B of VOL knob setting 4 screw P3 10 8 RADIO board 2 Set the pointer to the guide line 3 chassis 7 Turn CV1 and RV1 shaft in the arrow direction fully 6 speaker pointer guide line knob TUNE knob VOL marking A CV1 RV1 RADIO board Conductor Side marking B ...

Page 5: ... a maximum reading on level meter T1 455 kHz FM RF SSG 22 5 kHz frequency deviation by 400 Hz signal FM lead wire antenna terminal speaker terminal 0 01 µF set level meter AM RF SSG Put the lead wire antenna close to the set 30 amplitude modulation by 400 Hz signal Output level as low as possible set speaker terminal level meter Adjusting Location RADIO board Component Side Clock Frequency Check C...

Page 6: ... 6 D202 F 6 D203 C 7 D204 G 4 D205 G 3 IC1 D 4 IC101 G 4 LED101 H 4 Q1 F 2 Q201 D 6 Q202 D 7 Note on Printed Wiring Boards X parts extracted from the component side Y parts extracted from the conductor side W indicates side identified with part number internal component b Pattern from the side which enables seeing ...

Page 7: ...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 U B Line H adjustment for repair Voltages are dc with respect to ground under no signal detuned conditions no mark FM AM Impossible to measure Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted du...

Page 8: ... identifiés par une marque sont critiques pour la sécurité Ne les remplacer que par une pièce portant le neméro spécifié The components identified by mark or dotted line with mark are critical for safety Replace only with part number specified When indicating parts by reference number please include the board A 3679 957 A RADIO BOARD COMPLETE 1 535 804 11 SNAP BATTERY 3 922 610 01 HOLDER ANTENNA C...

Page 9: ...ITCH TACTILE ALARM S6 1 554 303 21 SWITCH TACTILE CLOCK S7 1 554 303 21 SWITCH TACTILE SLEEP S8 1 554 303 21 SWITCH TACTILE SNOOZE SLEEP OFF TRANSFORMER T1 1 404 790 11 TRANSFORMER IF FLAT CABLE W701 1 776 983 11 CORD CONNECTION W702 1 769 137 11 CORD CONNECTION 16 CORE MISCELLANEOUS 11 1 769 339 22 CORD POWER E 11 1 783 817 21 CORD POWER US Canadian SP1 1 504 748 21 SPEAKER 6 6CM T101 1 427 927 1...

Page 10: ... 14 ICF C121 Sony Corporation Personal Mobile Communication Company 9 925 799 11 98B0531 1 Printed in Japan 1998 2 Published by Quality Assurance Dept ...

Page 11: ...FUNCTION for WHITE 3 3 930 827 11 KNOB FUNCTION for BLACK Canadian 12 3 930 824 01 CABINET LOWER WHITE 12 3 930 824 13 CABINET LOWER BLACK Canadian Ref No Part No Description Remark 11 1 3 930 826 01 BUTTON 2 3 930 823 21 CABINET UPPER 3 3 930 827 01 KNOB FUNCTION 12 3 930 824 01 CABINET LOWER 2 CORRECTION EXPLODED VIEW Indicates corrected portion Page INCORRECT CORRECT 11 Ref No Part No Descripti...

Page 12: ...inted in Japan 1999 6 Published by General Engineering Dept Ref No Part No Description Remark Ref No Part No Description Remark 11 1 769 339 22 CORD POWER ELECTRICAL PARTS LIST Indicates corrected portion Page INCORRECT CORRECT Ref No Part No Description Remark Ref No Part No Description Remark 13 MISCELLANEOUS 4 1 535 804 11 SNAP BATTERY 11 1 769 339 22 CORD POWER ACCESSORIES PACKING MATERIALS 3 ...

Page 13: ... File this supplement with the service manual Subject Addition of Parts US model only Serial No 1 544 651 and later ECN 801622 US Model Canadian Model E Model Former Type New Type DISCRIMINATION Specification Label LABEL FCC RADIO 1999 11 ...

Page 14: ... 2 PRINTED WIRING BOARD Changed portion Page Former Type New Type 7 Location C G 1 3 View A SHIELD CASE Bond SOLDER L2 S1 b View A ...

Page 15: ... 3 SCHEMATIC DIAGRAM Changed portion Page Former Type New Type 9 Location C G 5 8 ...

Page 16: ...in Japan C 1999 11 Published by General Engineering Dept ELECTRICAL PARTS LIST A 3679 957 A RADIO BOARD COMPLETE A 3679 957 A RADIO BOARD COMPLETE EXCEPT US A 3683 137 A RADIO BOARD COMPLETE US C30 1 162 282 31 CERAMIC 100PF 10 50V US C31 1 162 600 11 CERAMIC 0 0047uF 20 16V US Page Former Type New Type Ref No Part No Description Remark Ref No Part No Description Remark 12 ICF C121 Items marked ar...

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