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 Post subject: PVM retracing lines remain after full recapping
PostPosted: Mon Sep 13, 2021 11:24 pm 



Joined: 15 Feb 2013
Posts: 29
I have a sony PVM-204M
All of the sudden, the retracing lines appeared at the top of the screen.
I replaced C-572 and C-584. No effect. I recapped all the main board (A), the neck board (C) and the power supply board (G), but that didn't change anything. For all the caps, I used nichicon 105deg, long life caps. If I adjust v-blanking, I can bring the image up, but even 255 is not enough.
I ESR checked all the removed caps, they were all fine.

Did anyone have the same problem?


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 Post subject: Re: PVM retracing lines remain after full recapping
PostPosted: Tue Sep 14, 2021 12:56 am 



Joined: 20 Apr 2018
Posts: 321
Location: Washigton DC
Can you post a picture of the problem?


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 Post subject: Re: PVM retracing lines remain after full recapping
PostPosted: Wed Sep 15, 2021 9:43 am 



Joined: 15 Feb 2013
Posts: 29
The same as in this video
https://www.youtube.com/watch?v=gz9GM7v85n4


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 Post subject: Re: PVM retracing lines remain after full recapping
PostPosted: Thu Sep 16, 2021 7:00 am 



Joined: 15 Feb 2013
Posts: 29
I noticed one strange thing. The menu seems to be shifted, but the signal not so much.
See the attached picture.
The top pictures show the monoscope, and the menu, with underscan.
The bottom pictures show the same things, without underscan.

As you can see, the top of the image is replaced by the retracing lines.
https://ibb.co/GvfqHGn


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