Emerson EWT19S3 Service Manual page 24

Power Supply Block Diagram
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.
HOT CIRCUIT. BE CAREFUL.
4A/125V
F601 L601
4A/125V
LINE
FILTER
AC601
AC CORD
CN691
DG691
DEGAUSSING
COIL
PS691
Q601
SWITCHING
4A/125V
HOT COLD
D605 - D608 T601
BRIDGE
6
RECTIFIER
4
2
Q602
LIMITER 1
4 1
IC601
ERROR
VOLTAGE DET
3 2
RL601
6-9
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 4 A, 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.
7
10
8
Q671
SWITCHING
12
9
11
VR661
+B
Q662
ADJ
Q676
FEED
SWITCHING
BACK
CONTROL
Q675
SWITCHING
P-ON-ON
Q696
SWITCHING
DG-ON-ON
TP601 TP300
+B GND
+B
AL+33V
DEF +B
BACK-UP
+5V-CTRL2
Q111
(FROM PIN18 OF IC111)
+5V
AL+5V
SWITCHING
Q321
+9V
AL+9V
SWITCHING
Q681
+8V
P-ON+8V
SWITCHING
+8V-CTRL
(FROM PIN40 OF IC111)
PROTECT-2
Q682
(TO PIN67 OF IC111)
+5V
P-ON+5V
SWITCHING
+5V-CTRL
Q683
(FROM PIN28 OF IC111)
+5V
P-ON+5V
SWITCHING
PROTECT-1
(TO PIN68 OF IC111)
P-ON-H
(FROM PIN79 OF IC111)
AL+12V
DG-ON-H
(FROM PIN74 OF IC111)
MAIN CBA
6-10 L6406BLP