WPC-95 AV board problems

[GKW 98]

I have a Scared Stiff and when I bought it, everything worked fine.
About a month later, the sound and video started going and then I
smelled something burning and the F501/2 fuses blew. I sent the board
off for repair and it came back "repaired." After re-installing the
board, I heard loud hums coming from all speakers, but no game
sounds. The fuses were not blown, though.
In the interim, I bought an NOS AV board, so I installed this one and
immediately, the game sound worked and no loud hum, but within
minutes, all four of the fuses blew.
Any ideas?

[Chris Hibler]

Hi Greg,

Yup, this is the way to post a problem.
Hmmmm...those fuses all fuse the AC power coming from the transformer
secondary. I would guess that you have a power issue coming from your
transformer.

I didn't do the research to see if this could cause the problem, but
make sure the game is jumpered correctly for 120VAC/60Hz nominal US
voltage supply...assuming you are in the US.

Disconnect everything that the transformer secondary attaches to and
test it's output voltages.

It sounds like you may need a qualified repairman to pay you a visit.
--
Chris Hibler - CARGPB #31
www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm

[lesley]

Did you change any speakers? Any shorts in the speakers? ( Maybe
something sitting on the cabinet speaker) Have you checked the V
coming on to the A/V board at J605? Have you tried disconnecting the
J606 and J604 and replacing the fuses? A few ideas. Don