Emerson Magnavox EWC20D5 Service Manual page 51

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
D1311 Cathode
TP1303
(C-Trap Adjustment)
GND
1-10-23
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.
SCREEN-VR
R1583 FOCUS-VR
(Hf0 Adjustment) (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.
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
MAIN CBA
Ref No. Position Ref No.
ICS TRANSISTORS
IC1001 D-4 Q1616
IC1201 B-3 Q1619
A-2
IC1202 Q1621
IC1452 A-4 Q1622
IC1551 D-1
Q1623
E-3
IC1601 Q1731
IC1602 D-3 Q1736
IC1603 D-3 CONNECTORS
IC1604 D-2 CL501B
CL502B
IC1801 B-1
TRANSISTORS CN001
Q1282 A-2 CN002
Q1285 A-3 CN1571
Q1301 B-2 CN1601
VR1601
Q1303 A-3 CN1801
+B ADJ
Q1304 B-4
CN1802
Q1305 B-1
Q1306 B-1 J1734
Q1307 B-1 J2023
Q1308 B-1 TP1301
A-4
Q1454 TP1303
Q1571 C-1 TP1304
Q1572 C-1
TP1305
Q1591 C-1
TP1401
J2023
Q1601 E-3 TP1402
+B ADJ
Q1602 E-3 TP1403
Q1604 E-3 TP1404
Q1605 C-2 TP1405
TP1501
Q1606 C-2
Q1607 C-2 TP1502
TP1503
Q1608 D-2
Q1610 C-2 TP1731
Q1612 C-2 TP1732
Q1613 C-2 TP1733
Q1614 C-2 VARIABLE RESISTOR
Q1615 D-3 VR1601
1-10-24
Position
C-2
D-2
C-3
C-4
C-3
B-4
B-4
D-1
B-1
C-4
B-4
D-1
D-4
A-1
A-4
TEST POINTS
B-4
E-2
B-1
C-1
C-1
B-1
A-1
A-1
B-1
B-1
B-1
C-1
C-1
C-1
C-1
A-4
A-4
E-2
BTD810F01011