Nexus13
Member
Hey all,
I've got a baby pacman that had some serious battery leakage. This machine has a few problems I'm currently working with:
1.) Leaky battery and corrosion on MPU
- I've removed the batteries and installed a 5101 NVRAM and got picture!
2.) green wavelength missing
- I had good color for about 5 minutes and now the green color is gone gone
- I've contact cleaned all my pots and tested them with a multimeter and they seem good (including the vidiot board pots)
- I've also reseated and cleaned my chips and connections but I"m thinking the MC6809P might be bad? found some replacements on ebay
- I recapped the monitor and hooked up my Test pattern generator and the monitor shows green color fine
3.) left bumper fires repeatedly when held
- i've replaced the coil and little metal piece next to the coil but it just continually fires (i'll get a video for it with a later post)
- would the corrosion to the MPU have caused a problem like this? Not sure where to start looking for fix this part of my problem
4.) sound
- no sound at all
- i can turn up sound pot and the pot at the front but i just get background hum
Thanks in advance for your suggestions/help. Pics to come soon!
I've got a baby pacman that had some serious battery leakage. This machine has a few problems I'm currently working with:
1.) Leaky battery and corrosion on MPU
- I've removed the batteries and installed a 5101 NVRAM and got picture!
2.) green wavelength missing
- I had good color for about 5 minutes and now the green color is gone gone
- I've contact cleaned all my pots and tested them with a multimeter and they seem good (including the vidiot board pots)
- I've also reseated and cleaned my chips and connections but I"m thinking the MC6809P might be bad? found some replacements on ebay
- I recapped the monitor and hooked up my Test pattern generator and the monitor shows green color fine
3.) left bumper fires repeatedly when held
- i've replaced the coil and little metal piece next to the coil but it just continually fires (i'll get a video for it with a later post)
- would the corrosion to the MPU have caused a problem like this? Not sure where to start looking for fix this part of my problem
4.) sound
- no sound at all
- i can turn up sound pot and the pot at the front but i just get background hum
Thanks in advance for your suggestions/help. Pics to come soon!
