wizard154
New member
Hello,
I am working on a Popeye cocktail table game for a friend. I have experience working on pinball and video game boards, but this is my first attempt at repairing a monitor.
The monitor in question is a Sanyo 18-2AB, and I have used these forums Sanyo 20EZ posts for repair diagnosis and reference.
• Initial Power up:
Monitor displays nothing on screen, B+ voltage is 140 VDC and non-adjustable. Neck heater glows bright and then goes off.
Game play and sound are perfect---I am playing in the blind.
• First Repair attempt:
I replaced bad Current Limiter transistor Q901 with new one from Bob Roberts.
• Second power up:
Same results as first, Monitor displays nothing on screen, B+ voltage is 140 VDC and non-adjustable. Neck heater glows bright and then goes off.
• Second Repair attempt:
New Q901 was blown, so I replaced with another new one.
Also replaced these components:
B+ pot
LA5112N Regulator (from Twisty Wrist arcade)
B+ filter capacitor with a 470uf/200v (from Bob Roberts)
• Third power up:
B+ voltage is @ 108v and adjustable.
There is a Heater glow at neck, but is very dim---had to turn lights off to see it---don't know if this is normal?
Screen is still blank, but I can get a bright white dot in center if I turn up the large Screen pot on flyback all the way up. Backing it off even slightly and bright white dot is gone.
I am getting 15.5v at AB1 on signal control circuit board. (I think this should be 16v)
Game play and sound are still perfect----still playing in the blind.
This is where I am right now and not sure where to look next.
I do want to note, (unfortunately) that I made a rookie mistake from the get go. I plugged the monitor into 120v house current when it was on my work bench but I am assuming that since it was already going into HV Shut down that this hopefully did no damage.
I also have a Deluxe Cap Kit from BR but was waiting till I got something on the screen to re-cap chassis board.
Any help would be greatly appreciated.
Thank you
Gary
I am working on a Popeye cocktail table game for a friend. I have experience working on pinball and video game boards, but this is my first attempt at repairing a monitor.
The monitor in question is a Sanyo 18-2AB, and I have used these forums Sanyo 20EZ posts for repair diagnosis and reference.
• Initial Power up:
Monitor displays nothing on screen, B+ voltage is 140 VDC and non-adjustable. Neck heater glows bright and then goes off.
Game play and sound are perfect---I am playing in the blind.
• First Repair attempt:
I replaced bad Current Limiter transistor Q901 with new one from Bob Roberts.
• Second power up:
Same results as first, Monitor displays nothing on screen, B+ voltage is 140 VDC and non-adjustable. Neck heater glows bright and then goes off.
• Second Repair attempt:
New Q901 was blown, so I replaced with another new one.
Also replaced these components:
B+ pot
LA5112N Regulator (from Twisty Wrist arcade)
B+ filter capacitor with a 470uf/200v (from Bob Roberts)
• Third power up:
B+ voltage is @ 108v and adjustable.
There is a Heater glow at neck, but is very dim---had to turn lights off to see it---don't know if this is normal?
Screen is still blank, but I can get a bright white dot in center if I turn up the large Screen pot on flyback all the way up. Backing it off even slightly and bright white dot is gone.
I am getting 15.5v at AB1 on signal control circuit board. (I think this should be 16v)
Game play and sound are still perfect----still playing in the blind.
This is where I am right now and not sure where to look next.
I do want to note, (unfortunately) that I made a rookie mistake from the get go. I plugged the monitor into 120v house current when it was on my work bench but I am assuming that since it was already going into HV Shut down that this hopefully did no damage.
I also have a Deluxe Cap Kit from BR but was waiting till I got something on the screen to re-cap chassis board.
Any help would be greatly appreciated.
Thank you
Gary