Panasonic SJ-MJ55GH, Service Manual

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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
No.
Mark I/O
Division
Function
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