Hi, i'm italian (sorry for my not good english) and i've a problem
with my
monitor.
This is a post about a problem whit my ADI PD-959 monitor and is EQUAL
to other question posted. I' d0't know if the other freinds had fixed
the fault.
Can anyone help me, please?


The monitor had Q831 shorted. I'd replaced with another BU2508DF but
not run yet. The green LED are lit all rthe time and both degauss and
vertical deflection works. The components around the Q831 (resistencs,
diodes ecc) are good and the B+ is present. The The FET Q563 (IRF740)
is good too (i changed it to test). With the scope i see a signal, 4 V
peak to peak, at the base of the HOT. The measured voltage, respect to
ground, both B, C and E starts initially
with approx 90V slowly raising to approx 220VDC over a period of
2,3 minutes; is correct this?
I've not the schematics or other information about, and i do't
know to do to fix the problem.
Many, many thanks for your attention
Regards
Alberto Malfatti