Build Your Own Arcade Controls Forum
Arcade Collecting => Miscellaneous Arcade Talk => Topic started by: davieboynj on August 30, 2009, 03:50:36 am
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My time pilot (restoration thread here: http://forum.arcadecontrols.com/index.php?topic=56692.0) had been out of commission for a while (wasn't taking coins) so today i decided to fix it. sure enough, there was a ground in the coin switch that had a bad connection. problem solved, right?
nope.
When i started to play, there was no sound. - - come to think of it, time pilot has attract sounds - - It must have been dead for a while, as even when it wasn't being used I still had it powered on from time to time.
Are there any troubleshooting steps i can perform here? can anyone point me in the right direction to replace the sound amps? I'm guessing that's what needs to be done here. I'm a little out of my depth, but, like Paul McCartney, "I'm gonna try with a little help from my friends..."
I'm tempted to take this "opportunity" to justify picking up Gyruss for testing, as it's the only other game I know that uses the same joystick and pcb wiring. Doesn't hurt that it's a personal favorite either... :)
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First, check your voltages. I don't know if Time Pilot requires -5VDC, but a lot of boards require it for sound. That or +12VDC.
Failing that, the amplifier IC may have blown. It happens.
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Just have to ask....
Have you turned the volume up on the pcb?
Attract mode sound can be turned ON or OFF via a dipswitch setting.
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thx for the replies. I have messed with the volume knobs on both the board and underneath the control panel, with no effect. I do get a very quiet scraping sound when moving the one under the control panel, but not as loud as i would expect. I'm doing all this during gameplay, just in case my memory is shot.
I'm going to check the voltages with a probe, is there anything more i need do? I know that sometimes a PC power supply will show voltage, but won't work under load. I'll post my results...
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the voltages seem fine.. -5v is only -4.8 but i'd assume that's ok.
If i have to replace the amps, are there any tutorials for that?
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It's likely a problem with the connection between the 2 boards. Mine will not play sound unless I squeeze the two boards together a bit.
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do you mean the ribbon cable? I'll give it a shot...
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tried it a few times and no luck... any other ideas?
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Is the potentiometer in the cab good ?
Is there sound coming off the board but prior to the cabinets potentiometer ?
Could still very well be a sound amp issue, but might as well plug away at the little stuff first.
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first off, thanks, all for your help. I'm sorry i've not been quicker testing things, but i've just been so busy with "real life"TM lately. anyways, i bypassed the potentiometer and no luck... should i check ac voltage on the speaker output, or is it a foregone conclusion that the audio amp is blown? anyone know how or what parts i need to replace it? or should i just replace the entire board?
As a side note - - this game is so difficult to play without sound. I never would have guessed that...