2
TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
2
2.
GENERAL
Location of Controls .......................................................
3
Setting the Clock .............................................................
3
Installation .......................................................................
4
Connections .....................................................................
6
3.
DISASSEMBLY
......................................................... 10
4.
ASSEMBLY OF MECHANISM DECK
........... 12
5.
MECHANICAL ADJUSTMENTS
....................... 15
6.
ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 15
Tape Deck Section .......................................................... 16
Tuner Section .................................................................. 16
7.
DIAGRAMS
7-1. Block Diagram – TUNER/TAPE Section – ................... 17
7-2. Block Diagram – MAIN Section – ................................. 18
7-3. Block Diagram
– DISPLAY/KEY CONTROL Section – ........................ 19
7-4. Block Diagram
– BUS CONTROL/POWER SUPPLY Section – ........... 20
7-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 21
7-6. Printed Wiring Board
– Main Board (Component Side) – ................................ 22
7-7. Printed Wiring Board
– Main Board (Conductor Side) – .................................. 23
7-8. Schematic Diagram – Main Board (1/4) – ..................... 24
7-9. Schematic Diagram – Main Board (2/4) – ..................... 25
7-10. Schematic Diagram – Main Board (3/4) – ..................... 26
7-11. Schematic Diagram – Main Board (4/4) – ..................... 27
7-12. Printed Wiring Board – SUB Board – ........................... 28
7-13. Schematic Diagram – SUB Board – ............................... 28
7-14. Printed Wiring Board – KEY Board – ........................... 30
7-15. Schematic Diagram – KEY Board – .............................. 31
7-16. IC Pin Function Description ........................................... 34
................................................ 40
............................... 43
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.
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.
SECTION 1
SERVICING NOTES
MODEL IDENTIFICATION
The XR-C7500R and XR-C7500RX have three types of MAIN
boards respectively.
TUX1
R606
R607
CN201
– MAIN BOARD (Conductor Side) –
TYPE A TYPE B TYPE C
R606
×
a
a
R607
a
×
a
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