Re: TECH: Aux Power Drive Unit Board Caught On Fire!

PinballPoor <super.pcc@xxxxxxxxxxx> wrote in news:Byzrg.235$bd4.204
@trnddc01:

Decided to try something someone else had success on here with. In
diagnosing a right ball popper that wasn't firing and coil is good, I
ran a long wire from the violet/yellow popper coil connection to point
1P11-5 on the CPU board connector. The schematic said that this point
had a Grey/Yellow wire connection and it does.
I turned on the pin (Space Station) and put it in coil test, let it
auto
test to RT BALL POPPER and pushed the blk manual button so that popper
will continually test when I put the wire onto the 1P11-5 point with a
probe. I did just that and the coil did fire but there was a spark that
left black residue on the plastic connector. Retried the probe on the
same point and FLAMES! Diode D35 burst in 2 pieces on the Aux PWR
DRIVER
BOARD and flamed. I barely dodged the flaming flying piece..The diodes
just above are either singed from the fire or got some collateral
damage.
I don't know what I did wrong here.. Isn't this test a logical way to
test for a broken wire down to the coil from the head?

Man... No offense, but you *really* need to buddy up to a collector in
your area and learn the basics before you do more damage! Where do you
live? Maybe someone is close by and can give you a thirty minute boot
camp?

I'm really hesitating to give you any advice right now, because I'm
really not convinced that you have a solid enough foundation of "how
stuff works" for it to do you any good.

It should be obvious in retrospect (flames and all!), but no, that's not
the right way to *test* a broken wire. The right way to *test* for a
broken wire is to do a continuity test from one end of the wire to the
other with the game off. Doesn't help you much now, but maybe will help
you for next time around.

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