UNITED TVC5044, Service Manual

Page: 31 / 92

1-7-6
P
o
wer Suppl
y Bloc
k Diagram
T6627BLP
6
4
2
1
14
13
11
10
9
8
LINE
FILTER
BRIDGE
RECTIFIER
T601
IC601
ERROR
VOLTAGE DET
W601
F601
T4A/250V L601 D601 - D604
SWITCHING
Q604
VR601
DEGAUSSING
COIL
CN601
Q602
+B ADJ.
FEED
BACK
LIMITER
Q603
PS602
4 1
3 2
HOT COLD
Q608
DG601
MAIN CBA
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage 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.
TIMER+5V
P-DOWN-L
(TO PIN85 OF IC201)
P-ON-ON
AL+9V
P-ON+8V
AL+12V(2)
AL+12V(1)
AL+5V
+5.7V
REG.
IC301
39 55
+B
DEF+B
POWER
SW601
+5V REG.
Q606 Q605
+8V REG.
Q607
AL+5V
P-ON+8V
P-ON-L
P-DOWN-L
12
5
4
6
AL+12V(1) 3
AL+12V(2) 7
AL+9V 8
AL+33V 11
12
5
4
6
3
7
8
11
TO
CRT/H.V.
BLOCK
TP503
+B
TP504
GND
CN602
12
JUNCTION-A
CBA
H.V./POWER SUPPLY CBA
CL603B CN603
P-ON-H
(TO PIN67 OF IC201)
+5V
REG.
+5V
REG.
+5V
REG.
IC681
Q684
Q686
P-ON+5V(1)
P-ON+5V(3)
P-ON+5V(2)
AL+33V
CM+12V
CL603A
12
5
4
6
3
7
8
11
12
5
4
6
3
7
8
11
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T4A/250V FUSE.
Q682
Q206
CL604
TOP
COVER