The Simpsons Pinball Party
Stern, 2003Hi everyone,
I was changing out IDC connectors on my TSPP and now my sound is completely gone. All wires are seated in the new connectors and they are repinned the same they were before. I don't get it. Any help is greatly appreciated.
Mark,
The IDCs are CN2 and CN4...both deal with the speakers. I used a multimeter on the fuses and they tested alright. Plus none of the fuses in the schematic seemed dedicated to the sound. Everything else on the game works as it should.
I appreciate any help you can pass on,
Rob
I always look at problems as what would I do. If I'd just worked on two connectors that deal with the speakers and the speakers then didn't work, that's where I'd look.
If you did the work with the power off and didn't reinstall the connectors reversed or one pin off I would not suspect you blew anything. Although anything is possible.
I would get the manuals out and check every wire color on those connectors to make sure they're correct. If that was ok I would get my DMM and in diode/continuity mode check each wire from the female connector to the board and make sure I had a good connection through the connector.
Also make sure you didn't yank on any surrounding connectors while working on those two.
Quoted from terryb:I always look at problems as what would I do. If I'd just worked on two connectors that deal with the speakers and the speakers then didn't work, that's where I'd look.
If you did the work with the power off and didn't reinstall the connectors reversed or one pin off I would not suspect you blew anything. Although anything is possible.
I would get the manuals out and check every wire color on those connectors to make sure they're correct. If that was ok I would get my DMM and in diode/continuity mode check each wire from the female connector to the board and make sure I had a good connection through the connector.
Also make sure you didn't yank on any surrounding connectors while working on those two.
Good advise, check all connectors close by you may have unplugged one or broke a wire while working. It happens.
Quoted from terryb:I
If you did the work with the power off and didn't reinstall the connectors reversed or one pin off I would not suspect you blew anything.
Terry,
Thanks for the help. The connector was installed with one pin off, had my kids helping...gotta love 'em! The power was turned on and CN2 connector was off by one pin. The display was not on, and that was when I noticed the connector was installed incorrectly. I pulled it off and put it back on correctly, all the while the machine was on. Do you think that could have blown something on the board? Which board would it be, the I/O Power or CPU/Sound? Everything else works just fine. Is there anyway for me to test the board to make sure it is messed up?
Thanks so much again
Yes I would guess that something got blown. I'm not a Stern expert but got this from Pinwiki regarding testing the voltages on the board:
No sound at all: Check the voltages on the board. On the DC input connector CN2 there should be approx. +12V DC between pin 2 (GND) and pin 6 (+12V) and -12V between pin 2 (GND) and pin 3 (-12V), these voltages come from the Power Supply Board. On the board itself are two voltage regulators to convert the +12V and -12V to +5V and -5V for the pre-amplifiers, check these voltages by measuring between the ground (GND, test point) and U30 pin 8 for +5V, U30 pin 4 for -5V.
Quoted from MAJRob:All fuses test out fine. Still stumped
Did you pull the fuses out when you checked them?
Gents! Happy to say that TSPP is fixed. A transitor was blown on the power board. It looked different from the rest. I replaced it and Simposons is golden. I can't express how much gratitude I have for dug and Terryb. I hope everyone has a happy new year. If you find your way into North jersey, swing by and beers are on me.
Aloha,
Rob
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Bel Air, MD
Lille