pinballdirec
Member
I have been working on a Atari All Points bulletin with a monitor issue. Monitor is a Wells Gardner 7915. I'm only getting a white screen with lines thru it. (Pictures are attached) I installed a cap kit and it stayed the same.
I went thru a flowchart and it suggested checking the +123 VDC, the voltage was actually +123. It prompted me to turn up the "Screen" control on the flyback and I had the white screen (Raster) with diag. line thru it. It then prompted me to check the sync connected to pin 3 on P2 (It ohmed out ok) Next step was to check Q4 & Q7, I just replaced them. The flow chart stops at this point and I ran out of things to try. Hopefully someone can tell by my pictures what is going on...
http://www.klassicarcade.com/k7915a.JPG
http://www.klassicarcade.com/k7915b.JPG
Thanks Kevin
I went thru a flowchart and it suggested checking the +123 VDC, the voltage was actually +123. It prompted me to turn up the "Screen" control on the flyback and I had the white screen (Raster) with diag. line thru it. It then prompted me to check the sync connected to pin 3 on P2 (It ohmed out ok) Next step was to check Q4 & Q7, I just replaced them. The flow chart stops at this point and I ran out of things to try. Hopefully someone can tell by my pictures what is going on...
http://www.klassicarcade.com/k7915a.JPG
http://www.klassicarcade.com/k7915b.JPG
Thanks Kevin
