HP CRT Monitor s7500 Service Manual page 24

5-5 Out of Horizontal Synchronization
Out of Horizontal
Synchronization
Horizontal
sync present at
pin 15 of I401
Yes
Check
I401 pin 8 H. output
frequency & pin 29
waveform
Yes
Check Q401,
T401, Q402,
R424, D401
5-6 Out of Vertical Synchronization
Out of Vorizontal
Synchronization
Vorizontal
sync present at
pin 14 of I401
Yes
Check
I401 pin 24 waveform
Yes
Check I401 pin 13 & pin
14.
Page 22
Check or replace
the signal cable or
No
H. sync pin 41
of I701.
Check or replace
No
I401, C406
Check signal
cable & V. sync
No
pin 42
of I701.
Check or replace
No
I401,
HP S7500/MV7500/CV7500