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Author Topic: What do I need to get backlite to work?  (Read 19058 times)
FORDSBS
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« Reply #25 on: December 21, 2010, 12:12:26 AM »
Thata what I was thinking. I'll get some 47 ohm resisters & try that
Thanks
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« Reply #26 on: December 21, 2010, 12:15:30 AM »
Actually is that buzz on all the time?  That might be something else.  My previous post was referring to the noise occurring during a spin.  But maybe it would work for it being constantly on as well.  If the cable that Bob sent is removed, does the buzz go away?

Thanks
Jason
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« Reply #27 on: December 21, 2010, 12:23:20 AM »
It's on all the time. I'll have to try and unhook tomorrow & see what happens.
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« Reply #28 on: December 21, 2010, 12:26:57 AM »
When I unplug the backlite - noise is gone.
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« Reply #29 on: December 21, 2010, 12:38:41 AM »
I used 10 ohm resistors on mine the other day. Took care of the noise and only required raising the volume level 1 step yes Make sure to do all three speakers on both + and - leads
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FORDSBS
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PET
« Reply #30 on: December 21, 2010, 12:42:04 AM »
2 on each speaker?
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« Reply #31 on: December 21, 2010, 12:49:36 AM »
Quote from: FORDSBS on December 21, 2010, 12:42:04 AM
2 on each speaker?

Radio Shack part number 271-1105 - 47 ohm 1/2W 5% Carbon Film Resistor did the trick for me per Bettor Slot's direction.  I put them on all three speakers (Left, Right, and Tray).  Install one resistor on only the white wire of each speaker.
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« Reply #32 on: December 21, 2010, 12:53:47 AM »
I went with 10 ohms on each the white and green wires. Don't know if it's right, but it worked
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FORDSBS
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« Reply #33 on: December 21, 2010, 12:57:53 AM »
Mine has noise all the time. When I unplug backlite @ controller the noise stops. Is that something like how yous worked?
Time for me to crash, early Dr. tomorrow.
Thank Jason & Cowboy
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cowboygames
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« Reply #34 on: December 21, 2010, 01:16:04 AM »
That's the way mine was, especially on my DD after I added a 42 simm
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« Reply #35 on: December 21, 2010, 01:17:44 AM »
Quote from: FORDSBS on December 21, 2010, 12:57:53 AM
Mine has noise all the time. When I unplug backlite @ controller the noise stops. Is that something like how yous worked?
Time for me to crash, early Dr. tomorrow.
Thank Jason & Cowboy

While I know nothing about these machines, it sounds like some noise is getting fed into the power supply and thus the sound system. If it were me, I would try some filter caps across the power lines going to the reel lamps and/or controller. But then again, I have a scope and would be able to track it down.
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stayouttadabunker
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« Reply #36 on: December 21, 2010, 02:40:57 AM »
It's definitely noise from the back light wires.
Been discussed before on another thread.
Resistor mods on all 3 speaker white wires will help, but not completely cure it.
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poppo
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« Reply #37 on: December 21, 2010, 03:01:38 AM »
Quote from: stayouttadabunker on December 21, 2010, 02:40:57 AM
It's definitely noise from the back light wires.
Been discussed before on another thread.
Resistor mods on all 3 speaker white wires will help, but not completely cure it.

A resistor mod to the speaker sounds like more of a band-aid than a fix. All it's doing is changing the speaker impedance and filtering the noise frequency at the speaker (along with any other wanted sounds in the same frequency range). Sort of like cranking down a frequency range with an equalizer. The real cure would be to filter the noise at the source.
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stayouttadabunker
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« Reply #38 on: December 21, 2010, 03:08:40 AM »
I agree...it's a band-aid...nothing more,  but it does the trick - most of the time.
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« Reply #39 on: December 21, 2010, 03:10:11 AM »
Quote from: stayouttadabunker on December 21, 2010, 02:40:57 AM
Resistor mods on all 3 speaker white wires will help, but not completely cure it.

I dunno, mine's completely silent with the resistors.  I can't hear any feedback at all...just the game sounds.  Not sure how much cleaner it could get.
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stayouttadabunker
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« Reply #40 on: December 21, 2010, 03:14:14 AM »
I 'll betcha your dog hates it.... Tongue Out
I have two dogs...I think one is deaf and sits by me while the other one runs to the other
end of the house when I'm playing my machine... bust gut laughing

* stop it please.png (54.48 KB, 263x233 - viewed 294 times.)
« Last Edit: December 21, 2010, 03:19:38 AM by stayouttadabunker » Logged
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« Reply #41 on: December 21, 2010, 03:22:46 AM »
Quote from: stayouttadabunker on December 21, 2010, 03:14:14 AM
I 'll betcha your dog hates it.... Tongue Out
I have two dogs...I think one is deaf and sits by me while the other one runs to the other
end of the house when I'm playing my machine... bust gut laughing


Bunker  IF this also works on CATS, you should patent it.   applause applause applause applause
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FORDSBS
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PET
« Reply #42 on: December 21, 2010, 09:48:46 PM »
It has a 502A board in. I think I'll  swap it out for a 504B from another machine.
Ford
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FORDSBS
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PET
« Reply #43 on: December 21, 2010, 11:05:55 PM »
Didn't change boards. This is what noise is like all the time.
<a href="http://www.youtube.com/v/-JrIZLLF2k4&rel=0" target="_blank">http://www.youtube.com/v/-JrIZLLF2k4&rel=0</a>
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FORDSBS
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PET
« Reply #44 on: December 22, 2010, 09:15:23 PM »
 Dancing Party
Put a 504-B board in. No more static noise. Thanks for all your help. +1 (Karma, or whatever) to all that helped
Ford
 Merry Christmas
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« Reply #45 on: December 22, 2010, 09:17:56 PM »
Oh man!  Now I'm going to have to order a 504b board...just because!

Good job Ford!

Jason
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« Reply #46 on: December 22, 2010, 09:35:37 PM »
Hey Jason, YOU are the one that mentioned the board. No noise & I did not put resisters in.
Ford
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« Reply #47 on: December 22, 2010, 09:38:31 PM »
Quote from: FORDSBS on December 22, 2010, 09:35:37 PM
Hey Jason, YOU are the one that mentioned the board. No noise & I did not put resisters in.
Ford

Yeah, I've known about the 504b fix for a while, i just haven't updated mine since the resistor trick is working.
J
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« Reply #48 on: December 22, 2010, 10:20:14 PM »
Does someone have schematics for the two boards to see what is different, and find out what the real fix is?
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FORDSBS
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PET
« Reply #49 on: December 22, 2010, 10:31:40 PM »
I don't know difference but I'm someone will chime in and let us know.
Ford
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