I can not set my high voltage on my Wells Garner 6100 monitor above 14500 volts.
In my Tempest 2 weeks ago, my WG6100 monitor lost the top half of the display. The video was squished down to a 2-3 mm horizontal line. The bottom half of the the display was fine, the game played fine.
I ordered a Bob Roberts 6100 kit along with the "Extra Parts kit for the 6100" I also ordered an Arcade Shop LV-2K board and a HV protection kit.
I installed the entire Bob Roberts kits, the LV-2K board and HV fuse kit. Powered the monitor on, played game 1 OK, In the middle of game 2, POW, the monitor display lost the top half, while the bottom half was fine (same as the original problem) I measured all the chassis mounted transistors, they all tested fine, neither shorted nor open. I then swapped out Q705 with the old one I had taken out. Now the monitor works fine.
I started adjusting the monitor, I set the size (width and height) I set the height slightly smaller than it was to reduce the stress on the chassis mounted transistors. I adjusted the brightness and focused the monitor fine.
BUT when I tried to adjust the HV, I could not set it greater than 14.5k volts. I used a Fluke HV probe connected under the silicone rubber cup to the top of the image monitor. The voltage would vary by tweeking the HV pot on the HV board, but I could not get it to the 19.5K volts the service manual said it should be. Now the monitor is working fine, and I do not want to kick the sleeping dog. But what can I do to get the HV set correctly? Any ideas? or should I just leave it alone.
PS I did not replace the HV board pot.
Thanks,
Steve
In my Tempest 2 weeks ago, my WG6100 monitor lost the top half of the display. The video was squished down to a 2-3 mm horizontal line. The bottom half of the the display was fine, the game played fine.
I ordered a Bob Roberts 6100 kit along with the "Extra Parts kit for the 6100" I also ordered an Arcade Shop LV-2K board and a HV protection kit.
I installed the entire Bob Roberts kits, the LV-2K board and HV fuse kit. Powered the monitor on, played game 1 OK, In the middle of game 2, POW, the monitor display lost the top half, while the bottom half was fine (same as the original problem) I measured all the chassis mounted transistors, they all tested fine, neither shorted nor open. I then swapped out Q705 with the old one I had taken out. Now the monitor works fine.
I started adjusting the monitor, I set the size (width and height) I set the height slightly smaller than it was to reduce the stress on the chassis mounted transistors. I adjusted the brightness and focused the monitor fine.
BUT when I tried to adjust the HV, I could not set it greater than 14.5k volts. I used a Fluke HV probe connected under the silicone rubber cup to the top of the image monitor. The voltage would vary by tweeking the HV pot on the HV board, but I could not get it to the 19.5K volts the service manual said it should be. Now the monitor is working fine, and I do not want to kick the sleeping dog. But what can I do to get the HV set correctly? Any ideas? or should I just leave it alone.
PS I did not replace the HV board pot.
Thanks,
Steve


