Author Topic: Skateball Flipper Issues TECH  (Read 662 times)

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Offline tomdotcom

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Re: Skateball Flipper Issues TECH
« on: September 01, 2009, 09:09:50 AM »
There are "seperate" issues with the rectifier board. Looks like they hacked the wiring a bit to bypass things possibly.

One thing at a time though haha.

Here's some pics of the rectifier board troubles just cause. That'll be my next project after the flippers

http://www.flickr.com/photos/tomdotcom88/sets/72157622199582934/show/

Also here's a great answer I got from another board:
As others have already pointed out, you will need to check (and replace if bad) the following.
I have included additional components in the chain involved with driving the flipper enable relay.
(Signal tracing would be required to pinpoint the exact place where the problem is, as opposed
to replace every component).

Be especially attentive to possible cold solder joints under the J4 headers, and with the pins
in the connectors on both the MPU and Solenoid Driver. Often corrosion cause broken pins
on the connector going to J4 on the MPU, causing issues with solenoids...

Components to check on the Solenoid Driver:
- Q15
- CR15
- R37, R38, R39
- U4 (transistor array)
- J4 pin 8 on the solenoid driver

Components to check on the MPU:
- J4 pin 7
- U11 PIA.
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