"thePfef" wrote in message
news
In article ,
"Arfa Daily" wrote:

It shouldn't take someone who is properly qualified in repairing this
type
of equipment, long to give a valid opinion as to what is wrong with it,
so
if you are going to take it to be looked at, pick a place that does do
repairs to AV amps. Pioneer is one of the better makes, and in general,
their equipment is fairly well behaved when it comes to diagnosing and
repairing faults. In my opinion, it would certainly be worth the expense
of
getting a proper quote to repair it.

I am going to make a new post asking for local shop recommendations.
Thanks.

What pinball do you have ? I have a
fully restored Williams Cosmic Gunfight from 1982.

Sweet! I have Bally World Cup Soccer '94. A completely different pinball
era than your CG, but plays fast and furious. I have learned a lot about
electronics repair (as well as plastic repair and overall pinball
maintenance) in my 4 years of ownership.

I love my CG. It uses the old series 7 CPU. Quite a simple straightforward
beast really. I bought it off a dealer who had rebuilt the playfield, but
couldn't get the CPU going. Paid him 50 quid for it. The CPU problem was
dead simple. The backup battery had leaked, and a couple of pcb tracks had
been eaten through. The game ROM sockets were very poor as well, so I put
some new ones in. When the guy had rebuilt the playfield, he had made many
mistakes, such as switch matrixing diodes in backwards, and the pull and
hold coil connections to one of the flipper solenoids that he had replaced,
were backwards. I had a full service manual for it that I got from a little
company in New York, and also the user and programming book, which has full
diagrams with wire colours for the switch and lamp matrices, and also all of
the solenoid channels. That helped considerably. Once all of that was
sorted, there were a couple of problems with blown transistors in the kicker
drive channels, and a couple of mechanical probs with the jet bumpers. The
final problems were all related to intermittent board interconnects, which
is a known problem with these series 7's, apparently. I finished up hard
wiring across between boards using ribbon cable, to overcome this. Since
then, it has been in more or less continuous use for probably 10 years that
I have had it. I just recently moved it into my conservatory, which has
produced a resurgence in interest from all the family and friends.

Arfa