TheBasement
Well-known member
WG K7000 repair help needed: Neck glow but no one home
I have a medium resolution Wells Gardner K7000 that is giving me tons of headaches. The monitor went out with a nasty smell. After checking I see that the flyback is toast.
1. I order and replace the flyback. After turning the game back on it blows the fuse immediately.
2. Next I replace the HOT (SD1398) and B+ regulator (STR3123) and do a cap kit. Turn on the monitor. It comes on, the games works, I am very happy. Its on for about 15 minutes. I turn the game off, move it back into its spot in the arcade and turn it on. Nothing. However, there is neck glow and the fuse is not blown.
3. Thinking maybe I had a HOT or regulator on the verge of tilting bad, I replace the HOT and B+ regulator again with new parts. Still nothing. I do have neck glow and no blown fuse. Adjusting screen and focus on flyback or brightness pot gives nothing.
4. I check the 5 diodes and big 2.7 ohm resistor that Bob Roberts talks about in the power supply. They appear to test good but I haven't replaced them. I also checked to make sure the hot and B+ regulator were not shorting to the chassis.
5. B+ reading is 112V. Not quite 123V, but I don't think it should give a blank screen now, should it?
I am at a real loss on what to try next or look at. I don't have an oscilloscope to check waveforms or pulses. Since medium resolution monitors are hard to come by in these neck of the woods, I would like to get this one fixed. The picture looks real good when it worked. Can someone help out or point me in the right direction?
I have a medium resolution Wells Gardner K7000 that is giving me tons of headaches. The monitor went out with a nasty smell. After checking I see that the flyback is toast.
1. I order and replace the flyback. After turning the game back on it blows the fuse immediately.
2. Next I replace the HOT (SD1398) and B+ regulator (STR3123) and do a cap kit. Turn on the monitor. It comes on, the games works, I am very happy. Its on for about 15 minutes. I turn the game off, move it back into its spot in the arcade and turn it on. Nothing. However, there is neck glow and the fuse is not blown.
3. Thinking maybe I had a HOT or regulator on the verge of tilting bad, I replace the HOT and B+ regulator again with new parts. Still nothing. I do have neck glow and no blown fuse. Adjusting screen and focus on flyback or brightness pot gives nothing.
4. I check the 5 diodes and big 2.7 ohm resistor that Bob Roberts talks about in the power supply. They appear to test good but I haven't replaced them. I also checked to make sure the hot and B+ regulator were not shorting to the chassis.
5. B+ reading is 112V. Not quite 123V, but I don't think it should give a blank screen now, should it?
I am at a real loss on what to try next or look at. I don't have an oscilloscope to check waveforms or pulses. Since medium resolution monitors are hard to come by in these neck of the woods, I would like to get this one fixed. The picture looks real good when it worked. Can someone help out or point me in the right direction?