Sony XR-C7350X, Service Manual

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2
TABLE OF CONTENTS
1. SERVICE NOTE
............................................................. 2
2. GENERAL
........................................................................ 3
3. DISASSEMBLY
.............................................................. 8
4. ASSEMBLY OF MECHANISM DECK
................ 9
5. MECHANICAL ADJUSTMENTS
............................ 12
6. ELECTRICAL ADJUSTMENTS
6-1. Test Mode ........................................................................ 12
• Tape Deck Section ........................................................ 12
• Tuner Section ................................................................ 12
7. DIAGRAMS
7-1. Block Diagrams
• TUNER/TAPE/MAIN Section ..................................... 13
• DISPLAY/KEY CONTROL/BUS CONTROL/
POWER SUPPLY Section ........................................... 14
7-2. Schematic Diagram – PRE OUT Board – ...................... 15
7-3. Printed Wiring Board – PRE OUT Board – .................. 15
7-4. Printed Wiring Board – MAIN Board – ......................... 16
7-5. Schematic Diagram – MAIN Board (1/2) – ................... 17
7-6. Schematic Diagram – MAIN Board (2/2) – ................... 18
7-7. Printed Wiring Boards – KEY/SUB Boards – .............. 19
7-8. Schematic Diagrams – KEY/SUB Boards – .................. 20
7-9. IC Block Diagrams ......................................................... 21
7-10. IC Pin Function ............................................................... 22
8. EXPLODED VIEWS
................................................ 25
9. ELECTRICAL PARTS LIST
............................... 28
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SECTION 1
SERVICE NOTE
SUB board
Front panel assembly
Please press on the sub board from above when checking it.
This assures that the connector does not lose contact.
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