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3
1 Notes
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
Summary of Contents for SC-UA7GS
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