Trying to learn to fix monitors... k7600 Med Res issue

Guru-420

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Trying to learn to fix monitors... k7600 Med Res issue

I have a 19k7635 from my APB. For the longest time, the monitor itself had a little bit of waviness to the picture, so I knew I needed a cap kit but it was a very low priority. Well, eventually, the monitor would work for an hour or so and then shut down. Recently, the monitor itself just flat stopped working.

So, last weekend I did a cap kit on it. I figured it needed one anyway, so I would start there. That hasn't fixed the issue. Fuse is not blown, and I can hear the high voltage getting to the monitor, but I do not seem to have any neck glow.

Looking for any pointers. I have off tomorrow, and it sounds like we will be having 50-60 degree weather (warm for WI winter)... I'd like to try to get this puppy running again. Thanks in advance for any pointers.
 
The K7000 thread stickied to this forum is applicable to this chassis. There are many things that this chassis needs in addition to a cap kit.

The most common failures I find are cold solder on the larger resistors as well as failing C36 and/or C38.
 
Thanks, I have this monitor out of the game currently, so I can go check those. I am suprised the K7000 sticky would apply to this as well. Time to REALLY dig into that sticky...
 
The K7600's are the medium res version of the standard K7000 monitors. There are minor differences but I am fairly sure everything in the sticky applies. If something looks different then ask here.
 
yes most things do apply in the sticky.

C36/38 do not fail often.

most of the time another part fails and takes them out but that is not always the case.

if the are good leave them in. there is no reason to replace a good part.

i would start with the caps and replace the fly, it is a ticking time bomb being that old.

do all the re-flow and trace reinforcement that the sticky has in it and you should be good to go.

Peace
Buffett
 
you said you heard high voltage but no picture, possible shutdown as soon as it turns on, check the voltage regulator, might be bad, or desolder one leg of D10 which is part of the shutdown circuit. if the monitor works then its a bad voltage regulator. if it doesnt work cold solder is suspect.
 
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