Changhong Electric 21NF55, Service Manual, Page: 17 / 83

SERVICE MANUAL
15
2. BLOCK DIAGRAM FOR SUPPLY VOLT-AGE SYSTEM
Regulator
V115
N441
N442
Regulator
V871,
VD882
FBT
T400
VD491
+190V
VD451
+45V
VD461
+16V
VD471
To CRT RGB PCB
To A100,N401
To N401
+8V
+5V-2
To A100
VD891
+115V
To N600
VD881 +15V-H
VD871 +15-S
+5V-1
To H Out
EEPROM
R/C Input
+3.3V
To N100
Keyboard
Switch
Transformer
T804
Power Regulat ion
and Control Circuit
STR-G5653/F6654
Bridge Rectifying
Filter
VD803~VD806
C802,C807
Line Filter
L801,C801,
C802
1 5 0-2 5 0V~,50
/60
Hz
Feedback Circuit
N801
Error Signal
To A100,
N100,
N650
Fig .
6
Block Diagram for EX-1A 1 Supply Voltage System