Power Supply Block Diagram - Sylvania SRT2227X Service Manual

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
CAUTION:
4A/125V
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 4A, 125V.
HOT
T601
D605 - D608
BRIDGE
6
RECTIFIER
4
2
Q602
LIMITER 1
4
IC601
ERROR
VOLTAGE DET
3
RL601
6-9
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 4 A, 125V FUSE.
COLD
9
Q671
10 SWITCHING
Q676
SWITCHING
11
CONTROL
12
14
13
1
2 Q662
FEED
BACK
DG-ON-H
Q696
(FROM PIN74 OF IC111)
(SWITCHING)
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
TP601
+B
Q111
+5V
SWITCHING
Q321
+9V
SWITCHING
Q681
+8V
SWITCHING
Q682
+5V
SWITCHING
Q683
+5V
SWITCHING
Q831
SWITCHING
VR661
P-ON-ON
+B ADJ
SWITCHING
Q833
P-ON+8V
Q832
SWITCHING
Q675 P-ON-ON
SWITCHING
P-ON-ON
MAIN CBA
6-10
DEF +B
PROTECT-2
(TO PIN 67 OF IC111)
+B
AL+33V
BACK-UP
P-ON+5V
+5V CTRL2
(FROM PIN 18 OF IC111)
AL+9V
AL+12V
P-ON+8V
+8V CTRL
(FROM PIN40 OF IC111)
PROTECT-1
(TO PIN68 OF IC111)
P-ON+5V
+5V CTRL
(FROM PIN28 OF IC111)
P-ON+5V
P-ON+12V
P-ON+8V
P-ON-H
(FROM PIN79 OF IC111)
L6600BLP