bstnguy
Well-known member
Hi Group,
Looking for some input for a Tempest that plays blind. I'm not a EE and don't play one on TV, so bear with me.
The Known:
Game plays blind
Verified monitor is not the issue
Spot Killer On
Big Blue replaced, PS putting out 5.05VDC
Turning up Screen shows one line from the center of the screen straight down, nothing else
VR1 & 2 putting out +15 and -15 and getting good 5V
Input to MC1495 (C12 pin 9) swinging +/-
Outputs of MC1491 (C12 pin 2,14) both steady at 9.8V
So I'm not sure if C12 is bad, or D/E12 (the TL082) is bad and flooding the outputs?
The deeper learning for me is does the MC1495 split the small +/- signal and amplify it into two larger signals, one + and the other -, and then the TL082 amplify them more?
Any info would be helpful.
Thanks!
Looking for some input for a Tempest that plays blind. I'm not a EE and don't play one on TV, so bear with me.
The Known:
Game plays blind
Verified monitor is not the issue
Spot Killer On
Big Blue replaced, PS putting out 5.05VDC
Turning up Screen shows one line from the center of the screen straight down, nothing else
VR1 & 2 putting out +15 and -15 and getting good 5V
Input to MC1495 (C12 pin 9) swinging +/-
Outputs of MC1491 (C12 pin 2,14) both steady at 9.8V
So I'm not sure if C12 is bad, or D/E12 (the TL082) is bad and flooding the outputs?
The deeper learning for me is does the MC1495 split the small +/- signal and amplify it into two larger signals, one + and the other -, and then the TL082 amplify them more?
Any info would be helpful.
Thanks!
Last edited: