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iankellogg
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« Reply #91 on: April 19, 2015, 09:48:59 pm » |
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i think thats the one. I can't check atm.
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P-feif
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« Reply #92 on: April 20, 2015, 08:07:31 pm » |
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Anyone ever order from Twisty Wrist Arcade? Looks like they have the same part for less. I can't find any part number even close or that will cross reference on Bob Roberts site, which is a shame because I'd much rather get my parts from him if possible.
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iankellogg
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« Reply #93 on: April 20, 2015, 08:08:53 pm » |
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twisty wrist is good stuff
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P-feif
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« Reply #94 on: May 05, 2015, 02:47:53 pm » |
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Got around to changing that voltage regulator today. With the old regulator I had 8.2 volts. With the new regulator I have 8.18 volts. Hmmmm. Something is wrong here.
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iankellogg
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« Reply #95 on: May 06, 2015, 07:57:15 am » |
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i'm not too sure what to say right now. if you have replaced the voltage regulator IC and the main transistor i dont know anything else off the top of my head.
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P-feif
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« Reply #96 on: May 06, 2015, 09:41:34 am » |
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Is it possible that one of the leg to the regulator or the transistor is grounded/shorted somewhere and I'm just missing it. I really thought that I had fixed it when I replaced those parts too.  Thanks for all the help Ian. I'm sure we're on the right track here..... |
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« Last Edit: May 06, 2015, 09:43:21 am by P-feif »
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iankellogg
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« Reply #97 on: May 06, 2015, 09:49:48 am » |
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Where are you measuring the voltage on the board? are you using an IC or are you using the two big caps in the upper left.
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P-feif
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« Reply #98 on: May 06, 2015, 04:49:52 pm » |
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Two big caps in the upper left.
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« Last Edit: May 06, 2015, 04:52:33 pm by P-feif »
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iankellogg
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« Reply #99 on: May 06, 2015, 05:07:03 pm » |
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those should be above 8V. measure on a chip. or one of the smaller caps in the middle of the board.
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P-feif
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« Reply #100 on: May 06, 2015, 07:19:43 pm » |
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Doh! Well o.k. then. If I get 5 Volts at the chip then I guess that means that I still have a weird sound issue to fix. I was really hoping to fix it with this voltage things. I'll look at it sometime over the next few days. Any particular pin or should I just look at the schematic?
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iankellogg
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« Reply #101 on: May 06, 2015, 07:25:08 pm » |
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If you have replaced all the caps in the audio section i will have to think about what it could be.
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iankellogg
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« Reply #102 on: May 06, 2015, 07:30:23 pm » |
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Okay i went back and watched the video. There is hardly anything wrong with that sound to me. It sounds a bit off but maybe try turning the volume down quite a bit and see if that improves it. Its certainly not like what i normally see when the audio is going bad.
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P-feif
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« Reply #103 on: May 06, 2015, 08:57:54 pm » |
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I have turned it down and it does the same thing. It breaks up, just quieter. I've tried other speakers and I can hear the same issue. I even went to a local arcade shop and listened to theirs and it is WAY better. I could live with it but I'm a perfectionist and I'll chase it until I don't have a way to chase it.  I've noticed a few "things" screwed to the side of the cabinet that I haven't been able to identify (or at least I haven't looked at the wire diagram to see what they are). Any chance that one of them might be a filter of some sort? |
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« Last Edit: May 06, 2015, 09:05:20 pm by P-feif »
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P-feif
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« Reply #104 on: May 27, 2015, 04:30:16 pm » |
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Well with the change in whether I've been working on outdoor projects so the Mrs Pacman has gone on the back burner for now. However it does get turned on and played. This morning I didn't have time to get into my outdoor projects because I had things to do with my son and his preschool class, but i did have a few minutes to fix a few small things that have been sitting on my work bench and while I was there I turned on the Mrs Pacman and played a few games. The last one ended with the PCB flipping out. I was having this trouble awhile back and thought that I had fixed it. I installed and new 4 fuse, fuse block, I installed and new PCB connector on the wire harness, and I also installed a new PCB edge connector repair kit on the PCB and reflowed some stuff on the board along with a new PCB axial cap kit installed. So today when it went nuts I was surprised as it's been playing stable since around Christmas time. Any ideas what else I should be looking for please feel free to comment. Not sure when I'll get to it but I'll keep any ideas in the back of my mind and I can always refer back to this thread too. Thanks....
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