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Secondary trouble can be prevented by taking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put a conductive mat on the work table.
Do not touch the legs of IC or LSI with the fingers directly.
Voltage and signal line
: Positive voltage line
: Playback signal line
11. Schematic Diagram
12. Printed Circuit Board Diagram
13. Block Diagram
14. Terminal Function of IC's
14.1. IC1 (C1BB00000728): RF AMP
Pin
Mark
I/O
No.
Division
1
NC
—
Not used, open
2
RVCC
I
Power supply input
terminal
3
RF1
I
RF 1 signal input terminal
4
RF2
I
RF 2 signal input terminal
5
VCC
I
Power supply input
terminal
6
F1
I
F 1 signal input terminal
7
F2
I
F 2 signal input terminal
8
A
I
A signal input terminal
9
B
I
B signal input terminal
10
C
I
C signal input terminal
11
D
I
D signal input terminal
12
GHSW
I
ROM/ RAM gain switching
signal input terminal
13
BWCT
I
Wobble signal band pass
filter switcing input
terminal
Function
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