ViewSonic Q51 series Service Manual page 45

Vref 8
INTERNAL
BIAS
F.B 2
COMP. 1
Is 3
Ct/Rt 4
5V
Vref
1/2 Vref
ERR
AMP
OSCILLATOR
1
Comp
2
F.B.
3
Is
4
Ct/Rt GND
IC901 3842
SET/
RESET
U.V.L.O.
LOGLC
1/3
C.S.
1V COMP
IC901
56A379-12
8
Vref
7
Vcc
2
4
8
3
6
C
O/P
U
5
IC901
UC3842
45
36V
R
PWM
LATCH
S
7 VCC
5 GND
6 O/P