Sony d f 21 service manual

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D-F21/F223T

Flexible Circuit Board Repairing

0 Keep the temperature of the soldering iron around 270°C during
repairing.

- Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

- Be careful not to apply force on the conductor when soldering
or unsoldering.

Notes on Chip Component Replacement

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum capacitor may be
damaged by heat.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE
WITH MARK A 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 PUBLISHED BY SONY.

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TABLE OF CONTENTS
1. SERVICE NOTE ................................................................. 3
2. GENERAL
Getting started ......................................................................... 4

3. DISASSEMBLY
3»1. Lid, Battery Case, Cabinet (Front) Assy
3»2. Lid Assy, Upper .....................................
33. Main Board, MD Assy
34. Optical Pick-up, Motor ..

00mm

4. ELECTRICAL ADJUSTMENTS

Tuner Section
CD Section .

5. DIAG RAMS

51. IC Pin Descriptions ........
52. Block Diagram ~CD Section
53. Block Diagram eTuner Section .
54. Block Diagram ePower Supply Section
55. Printed Win'ng Board ~Main Section~ ..
5»6. Schematic Diagram ~Main Section (1/3)~ .
5»7. Schematic Diagram *Main Section (2/3) .
5»8. Schematic Diagram »Main Section (3/3)- .
59. IC Block Diagrams ................................

6. EXPLODED VIEWS

61. Cabinet (Front) Section
62. Cabinet (Lower) Section
6-3. CD Mechanism Deck Section (CDM»3123EBA)

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7. ELECTRICAL PARTS LIST ......................................... 27