21 Feb
2004
21 Feb
'04
5:07 p.m.
Jules mentioned to me by e-mail that the blanking pattern is not stable,
and that there's a lot of ripple on the output of the 48V regulator in
the monitor. These 2 observations must be connected :-) -- it sounds like
excessive power ripple is upsetting the monitor's video circuity.
I would therefore check :
The 2 capactiors -- particularly the 0.1uF one -- on the regulator PCB
(on the back of the heatsink).
The following capacitors on the monitor main PCB :
C11 (47uF)
C10 (10uF)
C2 (1000uF)
C19 (47uF)
C3 (1000uF)
And
C3 (47uF) on the CRT base PCB
-tony