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Audio thump when powering up Corvette
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roc-noc
Apr 13, 2012, 6:57:39 AM4/13/12
to
I get a loud audio thump when first powering up my Corvette. The audio
is fine except for that. I don't hear this on any other SS pins of the
same era.
Any ideas?
Tom
--
roc-noc
This USENET post sent from http://rgparchive.com
TheKorn
Apr 13, 2012, 7:05:42 AM4/13/12
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roc-noc <t...@roc-noc.com> wrote in news:roc-noc...@rrgparchive.com:
> I get a loud audio thump when first powering up my Corvette. The audio
> is fine except for that. I don't hear this on any other SS pins of the
> same era.
>
> Any ideas?
Normal.
--
Have a home video that's trapped on your camera? Want to share it on the web or on
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> I get a loud audio thump when first powering up my Corvette. The audio
> is fine except for that. I don't hear this on any other SS pins of the
> same era.
>
> Any ideas?
--
Have a home video that's trapped on your camera? Want to share it on the web or on
DVD?
http://www.webwidevideo.com/
toolguy
Apr 13, 2012, 7:07:36 AM4/13/12
to
My Corvette does it too.
It does that and then the typical BING/BEEP upon booting.
--
toolguy
wayout440
Apr 13, 2012, 7:21:08 AM4/13/12
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An audio thump at power up is almost always because the power amp is
being turned on before or same time as the source. Audio gear thatnot
pinball often has a delay circuit built in to alleviate this problem.
Also, on a pinball you have no control of this since there are no
separate circuits to power up and the power amps are "integrated" into
the boards.
I don't have a schematic for Corvette so I can't really comment
specifics, however if the noise does bother you there are plenty of
delay/relay circuits that can be built to insert a relay to the speaker
so that comes on a second or few seconds after everything else does.
It's up to you if you feel the time trouble and expense is worth it.
I'd probably just live with it IMO.
--
wayout440
roc-noc
Apr 13, 2012, 8:22:16 AM4/13/12
to
Thanks for the feedback. I thought something was wrong with mine. I
guess instead it is just bad design. Like wayout said, you turn on the
audio power amp after the other circuits have initialized. I guess they
forgot to do that with Corvette.
Are there other pins that share this bug?
Tom
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roc-noc
seymour.shabow
Apr 13, 2012, 9:31:41 AM4/13/12
to
roc-noc wrote:
> Thanks for the feedback. I thought something was wrong with mine. I
> guess instead it is just bad design. Like wayout said, you turn on the
> audio power amp after the other circuits have initialized. I guess they
> forgot to do that with Corvette.
>
> Are there other pins that share this bug?
>
Pretty much all of them that have amps. The thump is harmless.
> Thanks for the feedback. I thought something was wrong with mine. I
> guess instead it is just bad design. Like wayout said, you turn on the
> audio power amp after the other circuits have initialized. I guess they
> forgot to do that with Corvette.
>
> Are there other pins that share this bug?
>
JonPin
Apr 13, 2012, 9:26:04 AM4/13/12
to
Thumps on start up...maybe you have a bad motor mount?
--
JonPin
flipper
Apr 13, 2012, 9:41:19 AM4/13/12
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On Apr 13, 6:05 am, TheKorn <TheK...@TheKorn.Net> wrote:
> roc-noc <t...@roc-noc.com> wrote innews:roc-noc...@rrgparchive.com:
I've got a funhouse that has become louder and louder on start up then
after a game or 2
I'll loose all sounds ......turn it off and on and sound comes
back ? What' happening there?
> roc-noc <t...@roc-noc.com> wrote innews:roc-noc...@rrgparchive.com:
after a game or 2
I'll loose all sounds ......turn it off and on and sound comes
back ? What' happening there?
TheKorn
Apr 13, 2012, 9:47:19 AM4/13/12
to
flipper <chica...@aol.com> wrote in news:ed47b114-266f-4331-b230-0da7c8819ba2@
2g2000yqk.googlegroups.com:
> I've got a funhouse that has become louder and louder on start up then
> after a game or 2
> I'll loose all sounds ......turn it off and on and sound comes
> back ? What' happening there?
Most likely your digital volume chip (u3) has lost its mind. Could also be the D
flip-flops that feed it going bad.
2g2000yqk.googlegroups.com:
> I've got a funhouse that has become louder and louder on start up then
> after a game or 2
> I'll loose all sounds ......turn it off and on and sound comes
> back ? What' happening there?
flip-flops that feed it going bad.
TheKorn
Apr 13, 2012, 9:49:23 AM4/13/12
to
> Thanks for the feedback. I thought something was wrong with mine. I
> guess instead it is just bad design. Like wayout said, you turn on the
> audio power amp after the other circuits have initialized. I guess they
> forgot to do that with Corvette.
>
> Are there other pins that share this bug?
Every single WPC & WPC-95 machine, and sys11 does this to a lesser degree as well.
> guess instead it is just bad design. Like wayout said, you turn on the
> audio power amp after the other circuits have initialized. I guess they
> forgot to do that with Corvette.
>
> Are there other pins that share this bug?
GTB Sys 3 does also.
pokepin
Apr 14, 2012, 4:10:48 AM4/14/12
to
roc-noc;1922076 Wrote:
> I get a loud audio thump when first powering up my Corvette. The audio
> is fine except for that. I don't hear this on any other SS pins of the
> same era.
>
> Any ideas?
>
> Tom
http://tinyurl.com/7h8bkcf
--
pokepin
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