Sony XR-C4120, Service Manual

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TABLE OF CONTENTS
1. GENERAL
Location of Controls ....................................................... 3
Resetting the Unit ........................................................... 4
Detaching the Front Panel ............................................... 4
Setting the Clock ............................................................. 4
Other Functions ............................................................... 4
Installation ....................................................................... 5
Connections ..................................................................... 6
2. DISASSEMBLY
......................................................... 9
3. ASSEMBLY OF MECHANISM DECK
........... 10
4. MECHANICAL ADJUSTMENTS
....................... 13
5. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 13
Tape Deck Section .......................................................... 13
Tuner Section .................................................................. 14
6. DIAGRAMS
6-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 17
6-2. Printed Wiring Board – MAIN Board – ......................... 19
6-3. Schematic Diagram – MAIN Board (1/2) – ................... 21
6-4. Schematic Diagram – MAIN Board (2/2) – ................... 23
6-5. Printed Wiring Board – KEY Board – ........................... 25
6-6. Schematic Diagram – KEY Board – .............................. 27
6-7. IC Pin Function Description ........................................... 31
7. EXPLODED VIEWS
................................................ 34
8. ELECTRICAL PARTS LIST
............................... 37
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.