Emerson EWC1303A, Service Manual

Page: 42 / 67

S1
S2
S3
T1
T2
T3
U1
U2
U3
V1
V2
V3
W1
W2
W3
X1
X2
X3
Main 4/5 Schematic Diagram
1-8-9 1-8-10 T5553SCM4
NOTE :
The voltage for parts in hot circuit is measured
using hot GND as a common terminal.
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.
4A/125V
CAUTION !
Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) 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.
VOLTAGE CHART (Power off mode)
Ref. No.
1 4
IC601 11.0 16.0
Ref. No.
IC602
Ref. No.
Q601
Ref. No.
Q602
Q604
Q605
Q606
Q607
Q608
Q609
Q610
Q611
Q612
Q613
1.4
0
1.9
0
8.2
0.7
0
6.5
B
0
7.8
0
3
0
G
1.8
5.6
3.0
5.1
3.0
8.8
0
3.0
8.2
5.1
0
2
10.0
D
137.0
C
3.2
9.9
7.9
0
5.8
0.9
0.1
6.7
0
8.9
0
S
0
E
0
1 2 3
3.0 0 1.8
MAIN 4/5
Ref No. Position Ref No. Position
IC601
W-2
Q609
T-2
IC602
T-3
Q610
T-2
Q611 T-1
Q601 X-2 Q612 S-2
Q602
W-2
Q613
S-1
Q604
V-2
Q605 U-2 CN601 X-1
Q606 U-3
Q607 U-2 VR601 V-2
Q608 T-2
TRANSISTORS
VARIABLE RESISTOR
CONNECTOR
ICS
TRANSISTORS