Re: My sound issue: not a sound board issue?

On 3 Jul, 13:53, "Steve McDevitt" <makt...@xxxxxxxxxxx> wrote:
At the instance that I left it on longer than I EVER left it on before...
and it did all this, yes, the other things were starting to get weak, too. I
didn't play it much longer to want to find out what was going on, but there
have been times when the sound started cutting out that the ball would get
stuck in weird spots (wouldn't/couldn't pop out of a trough, for instance).

I turned the machine on just this morning after being "cooled off" for about
7 hours. Fired right up. No "interface error", all sound.... no weakness to
any solenoid. Works good.... for now.

Here's a fact that may be useful: This is not grounded. Does this have any
effect? My home is older and the plug I'm using isn't grounded. So, If you
put one hand on the metal railings, you will get a slight shock, so to
speak. You can feel it, in otherwords. Does this have anything to do with
it?

"CornCob" <ping.cro...@xxxxxxxxxxxx> wrote in message

news:1f7229bd-7581-455e-998c-34b4fcc0dc6e@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

On 3 Jul, 06:47, "Steve McDevitt" <makt...@xxxxxxxxxxx> wrote:
Okay, the on going events of my stupid pinball, Who Dunnit.

I am looking into fixing/trading this sound board.... I just got done
playing this, and the stupidest thing happened: I played for about half
an
hour. The music started to cut out (as usually it will after being played
for about half an hour)... so I turned it off and called it a night. Then
I
remembered I needed to change the batteries, so I turned it back on about
3
mintues later. The test came up and said "soundboard interface error". I
thought to myself "man, I got to replace this sound board". I replaced
the
batteries and tested it out.

Here's the fun part: The power of the machine seemed very weak. Holding
down
both flippers was a chore for the game to do. The flippers would both
sort
of stutter while in the hold position. I thought it was odd, so I turned
the
machien off, unplugged all the cables to the sound board, then turned her
back on. Still gave me that interface error even tho no sound board was
even
plugged in. It bothered me about the stupid power weakness, so I played a
game without the board.... about a minute in, the power started to sort
of
give out on the flippers (they were super weak and couldn't even hit the
ball to the back of the game, then started to stutter again when held).

WTF is this? I don't want to pay a lot of money to fix my sound board
when
something else may be wrong with this machine? Anyone here anything like
this before? Could the power be weak, and that's why my sound starts to
go?
Never played it so long after the sound went to see what else happens,
but
now I see this, too? WTF?

Check the 50volt supply rail for the flippers, have your DMD hooked up
showing the reading while you play a ball (F102, F101). I doubt it's
the amplifer section of the audio board as the bus interface logic
where the error indicates is actually powered off the 5volt rail so
that to should be monitored (J502 on the sound board).

Do you know the history of the machine? i.e. if and when the bridge
and caps were replaced on any of the supplys? often power related
issues stem a bad bridge and/or cap.

Do you notice any other solenoids going weak? as some of them are on
the high power (50volt) circuits, like the flippers?

Ping

Certainly it's in your own interest to have a proper earth to your
games for safety's sake but that isn't likely to be the cause of your
weak solenoids.

Go over the various test points on the driver board looking at the
different power rails on your DMM. What you don't want is sudden
drops on your meter as this is where resets occur when it's on the
5volt rail. Some people go right away and replace the bridges and
caps but I do prefer a bit of checking before spending the $. Also
check your mains, it's not unheard of to have under voltage in, so you
get undervoltage out of your games transformer (we had a phase drop
out in our area last year and we only had 130volts at every outlet,
supposed to be nominally 230). FYI: The ball trough solenoid on your
game is powered by the same 50volt supply as the flippers.

Like 'orbaddict' says, check the transform input connections/links if
you've always had this problem with your game.

Checkout marvin's repair guide ( http://tinyurl.com/52pv5u )

Ping
.

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