Pole Position Repair Log...

KI4SWY

Well-known member

Donor 5 years: 2013, 2020-2023
Joined
Aug 18, 2009
Messages
2,017
Reaction score
229
Location
Brandon, Florida
Friend picked up a pole position for $50 -

well, no video sync, but if you tweaked the knobs, you could read RAM 0

so, pulled the boards, replaced the ram chip, plugged it back in, same thing RAM 0 , still no sync.

so, pulled out the Logic Probe starting check the Address Pins on the Ram, dead.. hmm.. checked the schematics, see a Custom 04XX drives the address lines, look on the board, MIA.. , PM Riptor, had chip next day! (USPS must be in turbo mode) pluged it in, wahoo no more ram 0... but now ROM 3... so look at the book, poped out rom 3, checked it against romident website, and what ya know, not found, pulled spare off another board, read it to check to make sure, pluged it in, BooM! we got game bootup, still having sync issues.

moved over to 11B/12B the HSYNC/VSYNC signals were present, and was able to get good picture if used my external sync circuit, long store short, someone had done a "repair" on 11B, and some how connected pin 6 to 12B/9 instead of pin 5??? i have no idea how or why it was that way, but after fixing the botch job of a repair, the sync output was fine, and we have a picture..

http://www.youtube.com/watch?v=5287yyaU2zo
 
Last edited:
Damn you are good. When he asked if I would check his board for him I was glad to see you there when I arrived. I knew it was in the right hands. We could make some good money with all the PP boards we have sitting around.
 
Cool. Didn't know Riptor sells Namco customs.
I have a PP in the queue somewhere...
 
Cool. Didn't know Riptor sells Namco customs.
I have a PP in the queue somewhere...

he generally doesn't but sometimes has one or two in stock :)

i was trying to find someone, and he actually helped someone else out.

yeah, im by no means a "pp" expert. this was actually a pretty easy fix in my of "fixes"
 
Back
Top Bottom