TC-S90D - Sony Audio Service Manual (repair manual). Page 2

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2
TC-S90D
TABLE  OF  CONTENTS
1.
SERVICING NOTES
................................................
3
2.
GENERAL
Location of Controls .......................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
5
3-2. Case .................................................................................
5
3-3. MAIN Board ...................................................................
6
3-4. Front Panel Section .........................................................
6
3-5. Tape Mechanism Deck
(TCM-230AWR41, TCM-230MWR41) .........................
7
3-6. LEAF SW Board, HEAD (A) Board and
HEAD (B) Board ............................................................
7
4.
TEST  MODE
..............................................................
8
5.
MECHANICAL  ADJUSTMENTS
.......................
9
6.
ELECTRICAL  ADJUSTMENTS
.........................
9
7.
DIAGRAMS
7-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 12
7-2. Schematic Diagram  – MAIN Section (1/2) – ................ 14
7-3. Schematic Diagram  – MAIN Section (2/2) – ................ 15
7-4. Printed Wirings Boards  – MAIN Section – ................... 16
7-5. Schematic Diagram  – LEAF SW Section  – ................. 17
7-6. Printed Wiring Board  – LEAF SW Section – ............... 17
7-7. Schematic Diagram  – PANEL Section – ....................... 18
7-8. Printed Wiring Boards  – PANEL Section – .................. 18
7-9. IC Pin Function Description ........................................... 19
8.
EXPLODED  VIEWS
8-1. General Section ............................................................... 21
8-2. Front Panel Section ......................................................... 22
8-3. Tape Mechanism Deck Section
(TCM-230AWR41) .......................................................... 23
8-4. Tape Mechanism Deck Section
(TCM-230MWR41) ........................................................ 24
8-5. Sub Chassis Assy Section
(TCM-230MWR41) ........................................................ 25
9.
ELECTRICAL  PARTS  LIST
............................... 26
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  0  OR  DOTTED
LINE  WITH  MARK  
0  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.
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