Schematic Diagram; Block Diagram - Panasonic SJ-MJ55GH Service Manual

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 —
2 RVCC I
3 RF1 I
4 RF2 I
5 VCC I
6 F1 I
7 F2 I
8 A I
9 B I
10 C I
11 D I
12 GHSW I
13 BWCT I
Function
Not used, open
Power supply input
terminal
RF 1 signal input terminal
RF 2 signal input terminal
Power supply input
terminal
F 1 signal input terminal
F 2 signal input terminal
A signal input terminal
B signal input terminal
C signal input terminal
D signal input terminal
ROM/ RAM gain switching
signal input terminal
Wobble signal band pass
filter switcing input
terminal