Re: SONY CPD-E400P overbrightness and visible retrace lines

Just to close this thread I opened: after getting quite deep in understanding the operation of a CRT monitor and checking several parts of it, I found that the monitor hardware-wise is perfectly healthy.

All it needed is a recalibration using the WinDAS software. Even tough I had no colorimeter at hand for a correct calibration, I am still having an amazing image with a very nice deep black and contrast.

I know that CRT itself is a dead technology, but the electronic solutions behind it are...

Re: SONY CPD-E400P overbrightness and visible retrace lines



All right, I will double check the voltages. I roughly checked with my scope and I barely saw any ripple on them. There was like a 2.5V peak-to-peak high frequency spike at 63kHz on all of them, but I guess it was just because of my probing. It is very difficult to access the D board while running the monitor....

Re: SONY CPD-E400P overbrightness and visible retrace lines

Thanks for the response. I will check the 200V there with my scope, but I cannot see how that cap could be related to the retrace lines as that part has something to do with the horizontal deflection.

Hi, I am trying to save my old monitor once I was so proud of. I hope there are still some people around with experience.

Symptoms: overbrightness and visible retrace lines. When full white image is displayed, the monitors shuts off with flashing yellow.

I have read previous threads and posts with similar issue, but none of the solutions can be applied to my monitor. According to them I need to suspect the G2 voltage as the issue.

I attached the page of the A board schematic. In my case the G2 voltage supply coming from the flyback transformer is supposed...

Re: New Members - please post your introductions here

Hi,

I am trying to fix my old monitor and slowly running out of ideas. I have seen other posts with similar issues and it looks that there are a couple of people here with experience so I will give the forum a try...

And one day maybe I can be of help for other people too..