Panasonic SC-UA7GS

3
1Notes
This simplified service manual is base on SC-UA7E (Order No. PSG1606004CE).
1) This service manual contains only following information
- Safety Precautions
- Specifications
- Schematic Diagram
- Main (Aux Tuner) Circuit
- Main (MICON) Circuit
- Printed Circuit Board
- Main P.C.B. (Side B)
- Exploded View and Replacement Parts List
- Packaging
2 Safety Precautions
2.1. Before Repair and Adjustment
Disconnect AC power to discharge AC Capacitors (C1001, C1002, C1003, C1004, C1007, C1008, C1409, C1518) through a 10 ,
10 W resistor to ground.
Caution:
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac to avoid overcurrent.
Current consumption at AC 220~240 V, 50/60 Hz in Power ON, FM Tuner at volume minimal mode should be ~ 550 mA.
2.2. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
Safety Ref No. Part No. Part Name & Description Remarks
21 RFKZ0487AB1 REAR PANEL
A2 K2CJ2YY00101 AC CORD
A2 K2CP2YY00061 AC CORD
A2 K2CQ2YY00119 AC CORD
A2 K2CT2YY00097 AC CORD
A3 RQT0B17-G O/I BOOK
PCB7 REP5347A SMPS / AC INLET P.C.B (RTL)
Q1403 B3PBA0000579 PHOTO COUPLER
Q1404 B3PBA0000579 PHOTO COUPLER
Q1405 B3PBA0000579 PHOTO COUPLER
Q1505 B3PBA0000579 PHOTO COUPLER
Q1701 B3PBA0000579 PHOTO COUPLER
DZ1001 D4EAY511A127 VARISTOR
L1001 G0B223J00001 LINE FILTER
L1003 G0B223J00001 LINE FILTER
T1401 G4DYA0000592 TRANSFORMER
T1501 G4DYA0000778 TRANSFORMER
F1001 K5D103BNA005 FUSE
F1401 K5G501YA0081 FUSE
F1501 K5G502Y00006 FUSE
P1001 K2AA2B000011 AC INLET
R1001 D0GF474JA048 470K 1/4W SMPS
R1002 D0GF474JA048 470K 1/4W SMPS
R1003 D0GF474JA048 470K 1/4W SMPS
C1001 F0CAF474A105 0.47uF SMPS
C1002 F0CAF474A105 0.47uF SMPS
C1003 F1BAF471A215 470pF SMPS
C1004 F1BAF471A215 470pF SMPS
C1007 F1BAF471A215 470pF SMPS
C1008 F1BAF471A215 470pF SMPS
C1409 F1BAF471A215 470pF
C1518 F1BAF471A215 470pF