Back to the Future: The Pinball
Data East, 1990Hey everyone just got a Back to the Future: The Pinball today and it’s in fantastic shape and plays flawless. I have one issue I have no idea where to start. The call outs or voices are much lower than the music. The soundboard looks new and the speakers and sub have been replaced by a pinball pro set. I’m relatively new and looking for any help. Also explain it like I’m 5 please lol. Thanks in advance
763E8F69-77F9-46BC-8188-D5181D99F398 (resized).jpegQuoted from dimthedaylights:Hey everyone just got a Back to the Future: The Pinball today and it’s in fantastic shape and plays flawless. I have one issue I have no idea where to start. The call outs or voices are much lower than the music. The soundboard looks new and the speakers and sub have been replaced by a pinball pro set. I’m relatively new and looking for any help. Also explain it like I’m 5 please lol. Thanks in advance[quoted image]
2 things to check-
1) Make sure all speakers are functioning, not uncommon to have bad connection at uppers and you are only hearing cabinet speaker.
2) Go into audits and adjustments and check the music volume there and adjust as needed.
You could have a bad volume control, they are typically dual units but I'd start with these simple items first.
That sound board is from a Monday night football.
Resistors R17 and R18 are wrong. Look at my pics of the schematics. First pic is from MNF schematic and third pic is back to the Future. BTTF needs 6.2k ohm resistors in those two locations. Pretty easy to check your board with a multimeter.
Almost certain that will be your issue, I had a the same problem trying to use a different board in a Monday night football.
Also, I know your soundboard is a Monday night football because it written on one of the amps in your picture. "MNF"
1585825997454402013510524114954 (resized).jpg15858260449517875601760772106407 (resized).jpgActually, looking closer at the pictures, those two resistors that I posted about look smoked. Definitely look to to be suspect
Quoted from kba78:Actually, looking closer at the pictures, those two resistors that I posted about look smoked. Definitely look to to be suspect
WOW!!! 
kba78 Impressive that you figured that out so fast! Thank you!! So my noob question is.. where do i find the right resistors for that? Or where can i find a replacement sound board as im not overly confident in my ability to replace those lol. Again thank you sooo much for the reply.
Glad to help, I do know a bit about data east, I have own almost every one of them. Lol
Great plains electronics is the place to get them.
Don't buy a sound board for that reason. Sound boards are expensive, but those resistors are pennies. Heck, gotta be a fellow pinsider in Buffalo that can help you out.
AWESOME!!!! You really are the BEST! One last question does the wattage make a difference? I ask as the one you linked here is 1/4 w but sadly greatplains has shut down the site to catch up on orders, so i was looking around at other options but want to ensure i have the correct wattage. Thanks again you are an absolute hero!
Quoted from kba78:Keep us posted on how things go
Wow! Ok so added those 2 resistors and we’re back in business! One question thou it seem the left speaker is slightly quieter than the right. I could just be overthinking it but wondering if you or anyone had any insight.
Thanks again for all the help. This has been incredible.
Glad to here it. As far as the left channel, it could just the caps getting weak. But if it's not drastically different, than I would leave it be
Looks like you have been taken care of. I also need some help, new to PINSIDE and have a Data East Star Trek 25th Anniversary pinball machine. It to is is in excellent condition. I have noticed that my sound seems to be distorted at times, and others it sound like a weird humming sound in the back ground. My volume control works but is not smooth in the increase or decrease in volume. My sound finally cut off the other day, and although I liked not having the sound issue anymore, i miss not having sound at all. Can someone help with advice?
Quoted from jadaigle:Looks like you have been taken care of. I also need some help, new to PINSIDE and have a Data East Star Trek 25th Anniversary pinball machine. It to is is in excellent condition. I have noticed that my sound seems to be distorted at times, and others it sound like a weird humming sound in the back ground. My volume control works but is not smooth in the increase or decrease in volume. My sound finally cut off the other day, and although I liked not having the sound issue anymore, i miss not having sound at all. Can someone help with advice?
The volume control is noted for getting crunchy with age. With the pin off try reseating the sound cables and try rotating the volume control high to low several times. Some background hum noise is fairly normal with DE pins and can vary by individual titles.
Quoted from kba78:That sound board is from a Monday night football.
Resistors R17 and R18 are wrong. Look at my pics of the schematics. First pic is from MNF schematic and third pic is back to the Future. BTTF needs 6.2k ohm resistors in those two locations. Pretty easy to check your board with a multimeter.
Almost certain that will be your issue, I had a the same problem trying to use a different board in a Monday night football.
Also, I know your soundboard is a Monday night football because it written on one of the amps in your picture. "MNF"[quoted image][quoted image]
Does wattage matter for them. If so what is the wattage.
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Depew, NY