My Indy is brain damaged! Any suggestions?

[andrew (nob)]

A few months ago I turned my Indy on for the first time in a while.

It came up with a message "Check Fuses F14 and F15".
The Switch matrix was totally dead.

I put the CPU board from my T2 in, and I no longer get the message.
But,
The Mini PF doesnt work (no motor in test, switches dont show up).
The Idol motor doesnt work (no motor in test, switches dont show up).
Mechanical switches work, but not opto switches.
Random Solonoid firing during attract mode

I put my new Rottendog Power/Driver board in my Demo Man, and the known good Demo Man Power/Driver in Indy - same problems.
I put my Demo Man ribbon cables in Indy - same problems.
I put my Demo Man fliptronics board in Indy - same problems.
I put my Demo Man aux driver board in Indy - same problems.
I disabled the audio board - same problems.
I disabled the DMD board - same problems.

Now, there is a Opto board under the playfield for Indy, but this is different to the one in Demo Man. Can a failed chip exhibit these issues?

Any other thoughts on what I should look at? I know the CPU board has issues, but I cant get to the bottom of what else might be problematic.
A friend suggested swapping transformers, though the symptoms appear more "logic" than "voltage" to me (with my current knowledge and skill set).

Anyone who can offer advice, please do so. I'm going crazy.

andrew

[dj10555]

Hi Andrew,

Couple of things to check. Would look at the switches under the mini PF and check switch is now bent or shorted. Sound like you don't have 12v running to the playfield (optos, motors ,etc). You have ruled out most of the boards. Could possibly be the connector pins to the driver board. Would try measuring 12v at TP3 and at TP1 on the driver board for starters. Could also be a wire under the playfield for the 12v has come off.

regards Derek

[andrew (nob)]

Thanks Derek, I'll pay close attention to the 12V tonight.

andrew

[andrew (nob)]

Hi there,

Thanks to Derek I narrowed down that 12V is indeed the problem.
12V to the flipper board, DMD, coin door etc was working, but not to the playfield.
Looking closer at the machine, reading Clay's pages and going through the manual, I realised J118 wasnt connected so there was no 12V to the playfield.
Looking at the original board Power/Driver board I took out J118 was hacked (ie directly soldered) so when I put the replacement Power/Driver in there was no 12V to the playfield.

Using alligator leads I managed to get 12V back to the playfield & came up with "gnd short" for 3/4/5.
I put the original CPU board in and came up with the same error messages.

So, CPU and Power/Driver are currently ok. I'm guessing 12V is screwed on the original Power/Driver board.
Now to track down the ground short that's throwing the errors.

Any suggestions - please send them my way. The error was occurring with power removed from the Mini Playfield and Idol Motor (though both kicked in with the connectors connected)

andrew

[dj10555]

On J118, do you also have pins 2,3 connected as these go the 10 switch opto board under the playfield.