Acer P221W Service Manual page 23

Acer
3. No raster
N o ra s te r
L E D G re e n ?
B a c k lig h t c a n
n o t b e tu rn e d o n
Y ES
I
s th e re 1 4 V d c
v o lta g e o n p in 1 3 o f
IC 5 0 1 ?
Y ES
Is th e re h ig h -le v e l
v o lta g e o n p in 8 o f
IC 5 0 1
Y ES
C h e c k C N 5 0 1 , C N 5 0 2 ,
C N 5 0 3 a n d C N 5 0 4 ?
Y ES
Is th e re p u ls e w a v e fo rm o n p in 1 ,
p in 3 , p in 1 5 a n d p in 1 6 o f IC 5 0 1 a t th e
m o m e n t o f re s ta rt?
Y ES
Is o k T 5 0 1 , T 5 0 2 ?
Y ES
C h e c k p ro te c te d
c irc u it Q 5 0 1 , Q 5 0 2 ,
Q 5 0 3 , Q 5 0 4
EN D
Y ES
Y ES
N O
N O
N O
N O
N O
C h e c k p o w e r
s u p p ly
Is R 5 2 6 O k ?
N O
Is O k IC 5 0 1 ?
N O
T 5 0 1 , T 5 0 2 fa il
22
Service Manual
Y ES
C h e c k I/F b o a rd
R 5 2 6 o p e n
C o n n e c tin g th e
o u tp u t c o n n e c to r
a g a in
Y ES
U 5 0 1 , U 5 0 2 fa il
IC 5 0 1 fa il