Re: ALBA T14 - Grey Raster with Retrace Lines
Hi, the fact that you have retrace (flyback) lines on the screen suggests to me something wrong in the video output stage or the biasing of the CRT, does the brightness control have any effect and can any audio even white noise be heard?
My first suggestions would be to ensure that the video output HT supply 95v is present at the cathode of W14 then check the voltages on VT9. It would be a good idea to replace C111 in the 95v supply if you haven't already. A suitable replacement for VT9 if it appears faulty would be a BF336 or BF337.
Good luck.
John.
Last edited by jayceebee; 17th Nov 2017 at 11:50 pm.
Reason: more info
|