Some updates.
Game arrived here on Friday. Big thanks to Neil and Craig for delivering it for me. Great chat to. Set up on its legs Friday ready for an inspection later on Saturday after returning from 8 bit flip
After getting back from 8 bit flip started the checking process of a non working game, starting with the rectifier board and checking all voltages. Rectifier tested good on all fronts, though had had some old work done on the bridge rectifiers being substituted for external ones on flying leads. Decided to cut all this out now even though working and properly repair the board as i have a good few bridge rectifiers at the moment form my recent sourcing of wpc rectifier parts. (
http://www.pinballinfo.com/communit...solidated-and-updated-list.32898/#post-156590 ) These are a replacement here to
So installed one of my spare rectifier boards to allow me to continue the power on checks.
Power driver board check out good, though there is some old transistor burn by the looks of it that will need investigating. Also it is a stern version board so will most likely swap out for a proper ball gone later.
On to the cpu, lamp and sound board. Cpu was tested and found to be dead, no surprise really. No led lamp lit, so board was taken out and moved to the bench.
First job was to replace the led so i could see what was really going on. Replaced and led stuck on as expected. Board condition itself was not too bad. Old battery acid damage was low and mainly in centre around led not on the left like normal. The ground planes green solder mask was also flaky.
Board then bareboned and U6 and U11 chips sockets replaced. Both had broken pins. U6 socket was in particularly bad shape. Old game and os roms were binned as burned new ones and board was rejumpered. Status led driver transistor was also changed for peace of mind.
Cpu then retested and booted to second flash. Nice
Both ram sockets then replaced to after inspection as more broken/corroded pins found. Status led resistor also replaced after finding that this was intermittent and confusing test results.
CPU board now booted to 7 flashes and was ready to reinstall into game
End of Saturday
Sunday morning arrived and installed a remote battery holder and lead on the cpu board then reinstalled into the game.
Game woke up and went into attract
Tested lamp driver board and sound board. Lamp driver seemed ok and was working, though some sets of lamps were missing. S&T sound board was missing final flash (dead speech rom) and was producing a serious amount of hum. S&T Board was replaced with one of my new replacements (
http://www.pinballinfo.com/communit...-board-gordons-alive.15923/page-3#post-154724) and that cured that
Crisp and clear '8 ball deluxe, 5 ball' was heard on reboot
He does 3D printed replacements.
