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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
L691
DEGAUSSING
COIL
PS691
Q601
SWITCHING
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4A/125V
HOT
T601
D605 - D608
BRIDGE
6
RECTIFIER
4
2
Q602
LIMITER
1
4
IC601
ERROR
VOLTAGE DET
3
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.
COLD
TP601
9
Q672
10
SWITCHING
11
Q673
SWITCHING
CONTROL
12
14
13
1
2
Q652
FEED
BACK
DG-ON-H
Q696
(FROM PIN74 OF IC333)
SWITCHING
DG-ON-ON
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
+B
Q851
+9V
Q961
+5V
REGULATOR
REGULATOR
Q681
+8V
SWITCHING
Q682
+5V
SWITCHING
Q683
+5V
SWITCHING
Q831
SWITCHING
VR661
P-ON-ON
+B ADJ
Q841
(SWITCHING)
Q191
SWITCHING
Q674
P-ON-ON
SWITCHING
P-ON-ON
Q832
SWITCHING
P-ON-ON
6-10
DEF +B
PROTECT-2
(TO PIN 67 OF IC333)
+B
AL+33V
BACK-UP
Q111
+5V
P-ON+5V
SWITCHING
+5V CTRL2
(FROM PIN 18 OF IC333)
Q321
+9V
AL+9V
SWITCHING
AL+12V
P-ON+5V
P-ON+8V
+8V CTRL
(FROM PIN40 OF IC333)
P-ON+5V
+5V CTRL
(FROM PIN28 OF IC333)
PROTECT-1
(TO PIN68 OF IC333)
P-ON+12V
P-ON-H
(FROM PIN79 OF IC333)
MAIN CBA
L6650BLP
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