gzsfrk
New member
Hello arcade repair gurus!
I'm continuing my efforts to get my OutRun Upright Deluxe fully operational. The primary outstanding issue is the audio, which was completely non-functional when I picked it up. To that end, I received a sound amp (Sega part #: 839-0035) in the mail today, fairly confident that it would be the solution to my sound woes (since the cabinet I bought didn't even have a sound amp in it when I picked it up). Keep in mind that I have already jerry-rigged an ugly little connector from the audio-out on the PCB to some computer speakers and verified that I am indeed getting an audio signal.
Unfortunately, after plugging the sound amp in (with all connectors facing the right direction), I still didn't get any sound coming out of the speakers. It's not that the speakers are bad either, as I hooked my kludgy spliced connector up to the wires going to the cabinet's speakers and still didn't get any audio except for a faint buzzing. So I pulled out the sound amp and started tracing wires. As far as I can tell, the power is coming in to the sound amp through the solid grey and solid light blue wires (in my cabinet, at least) in the 8-pin connector harness which also contains the three wires which go to the volume potentiometer. So when I take a DC voltage read on the grey/light blue wires with my DMM, it's only showing 0.16V, which I'm fairly sure is not what the sound amp is looking for. Thus, I suspect there's a problem somewhere in the power supply chain that's not giving the sound amp all the juice it needs.
If that's the case, then one work-around (short of ponying up the cash to buy a replacement power supply) would be to know what the input voltage is supposed to be and then simply install a DC adapter in the cabinet which can provide the requisite volts/amps and wire them into the sound amp.
So I guess my question is two fold:
1. Am I on the right track with diagnosing the problem so far (e.g. Am I, in fact, looking at the correct wires for input voltage)?
2. And if so, does anyone know what the voltage coming in to the sound amp should be? Or alternately, if no one knows off the top of their head, would someone mind taking a reading in their own OutRun, Afterburner, Hang-on, Thunderblade, etc. cab?
For reference, the parts list in the OutRun Owner's Manual refers to 839-0035 as "PWR AMP DC 12V 10W". So if that's the case, I suspect it's looking for a 12V input. However, I don't want to assume anything and blow up the sound amp. That, and I also can't be sure which wire is supposed to be negative and which positive, as even though I'm able to read 0.16V coming off the wires, I can't be sure that the polarity is correct given that there's obviously some other problems going on there.
Thanks much for any help or advice offered!
- m@
I'm continuing my efforts to get my OutRun Upright Deluxe fully operational. The primary outstanding issue is the audio, which was completely non-functional when I picked it up. To that end, I received a sound amp (Sega part #: 839-0035) in the mail today, fairly confident that it would be the solution to my sound woes (since the cabinet I bought didn't even have a sound amp in it when I picked it up). Keep in mind that I have already jerry-rigged an ugly little connector from the audio-out on the PCB to some computer speakers and verified that I am indeed getting an audio signal.
Unfortunately, after plugging the sound amp in (with all connectors facing the right direction), I still didn't get any sound coming out of the speakers. It's not that the speakers are bad either, as I hooked my kludgy spliced connector up to the wires going to the cabinet's speakers and still didn't get any audio except for a faint buzzing. So I pulled out the sound amp and started tracing wires. As far as I can tell, the power is coming in to the sound amp through the solid grey and solid light blue wires (in my cabinet, at least) in the 8-pin connector harness which also contains the three wires which go to the volume potentiometer. So when I take a DC voltage read on the grey/light blue wires with my DMM, it's only showing 0.16V, which I'm fairly sure is not what the sound amp is looking for. Thus, I suspect there's a problem somewhere in the power supply chain that's not giving the sound amp all the juice it needs.
If that's the case, then one work-around (short of ponying up the cash to buy a replacement power supply) would be to know what the input voltage is supposed to be and then simply install a DC adapter in the cabinet which can provide the requisite volts/amps and wire them into the sound amp.
So I guess my question is two fold:
1. Am I on the right track with diagnosing the problem so far (e.g. Am I, in fact, looking at the correct wires for input voltage)?
2. And if so, does anyone know what the voltage coming in to the sound amp should be? Or alternately, if no one knows off the top of their head, would someone mind taking a reading in their own OutRun, Afterburner, Hang-on, Thunderblade, etc. cab?
For reference, the parts list in the OutRun Owner's Manual refers to 839-0035 as "PWR AMP DC 12V 10W". So if that's the case, I suspect it's looking for a 12V input. However, I don't want to assume anything and blow up the sound amp. That, and I also can't be sure which wire is supposed to be negative and which positive, as even though I'm able to read 0.16V coming off the wires, I can't be sure that the polarity is correct given that there's obviously some other problems going on there.
Thanks much for any help or advice offered!
- m@