Symphonic CSC520DE Service Manual page 47

Main CBA Top View < TV Section >
CAUTION !
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F1601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
4A 125V
1-9-23
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE
MÊME TYPE DE 4A, 125V.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
J2002 SCREEN-VR
FOCUS-VR
+B ADJ (UPPER SIDE) (LOWER SIDE)
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
TP1503
B-OUT
TP1405
GND
MAIN CBA
Ref No. Position Ref No.
ICS TRANSISTORS
IC1001 D-4 Q1615
B-4
IC1201 Q1616
B-3
IC1202 Q1619
IC1551 D-1 CONNECTORS
E-3 CL001
IC1601
IC1602 D-2 CL002
IC1603 D-2 CL501B
IC1604 C-3 CN1571
IC1801 A-2 CN1601
IC1802 A-4 CN1801
TRANSISTORS CN1802
VR1601
Q1285 B-4
+B ADJ
C-3 J2002
Q1301
Q1303 B-4 TP1301
Q1304 B-4
TP1304
Q1305 C-3
TP1305
Q1571 C-1 TP1401
Q1572 C-1
TP1402
Q1591 C-3 TP1403
Q1601 E-3 TP1404
Q1602 E-3 TP1405
R1583
Q1604 E-3 TP1501
(H Adjustment)
TP1502
Q1605 C-2
Q1606 C-2 TP1503
Q1607 C-2 TP1731
Q1608 D-2 TP1732
Q1609 D-2 TP1733
Q1610 C-3 TP1734
VARIABLE RESISTOR
Q1612 C-3
Q1613 C-3 VR1601
Q1614 C-4
1-9-24
Position
D-2
D-4
C-3
B-1
B-1
D-3
D-1
D-4
A-1
A-4
TEST POINTS
D-1
B-4
C-4
C-4
A-4
A-1
B-4
B-4
B-4
C-4
C-4
C-4
D-3
A-1
A-1
A-1
E-2
BT9000F01012