Power Board - BenQ Q7T3-FP737S Service Manual

Q7T3-FP737S Dual function LCD Monitor Service Guide

4. Power Board

Y
Check IC 7 5 1
N
Plug CN7 0 1 again or
checking I/F BD
N
Plug CN6 0 1 again or Turn on lev e l ex i sted?
checking P W BD
N
Check CN7 5 2, CN7 5 3
Insert them again
was pluged properly?
Replace IC 7 5 1 , Q 7 5 1
Backlight didn ' t shine
Y
IC 7 5 1 PIN 9 IS 1 4 -
LED shined?
1 6 V ?
N
N
PW M ex i sted?
3 . 3 V ex i sted?
(BLT_A D J )
Y
N
(BLT_ON)
Y
Check IC 7 0 1 OK?
Y
N
Checking F 6 0 1
Check IC 6 0 1 Vcc
N
Replace IC6 0 2 ,
IC7 0 2 , D 7 0 1 or check
Confidential
Y
Y
Replace IC 7 0 1
Y
Replace new fuse
Broke?
N
Y
IC 6 0 1 , Q 6 0 2 , Q 6 0 3
ex i sted?
I/ F BD
Trouble Shooting
IS I/ F board connected?
Y
N
Replace new fuse
Replace new fuse
Replace
R 6 0 2
4