Wish I was there. Have fun guys. Report back later.
Repair Party @ Channelmanic's
- Thread starter channelmanic
- Start date
kspiff
Well-known member
You should all chip in and buy my 720 and Paperboy machines, and a few tubs of JAMMA boards. Parties need party favors.
ok, i will threadcrap. How much is the paperboy?
OP
OP
You should've come up and brought the tubs...
We had 5 ppl here and worked on several games. Randolph worked on installing a Galaga Renew Kit, I worked on a few different boards and checked some monitor tubes and chassis for Devin, and Darrick worked on a Galaxian board that was heavily modified.
There were three solder stations going at once and all four workbenches were used.
ekeeb
Member
Had a good time,thanks for having us.Ed
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I'm still the newb on this stuff so I was there to watch and learn really. Lolz
I had brought 3x 25" tubes, one turned out being a waste and only had a good blue color gun. One checked in as ok. The other needed rejuv and balanced out nicely. I also brought in two U5000 chassis, one from my Daytona and the other i bought as a repacement from Nixs. Both of those turned out to have bad HOTs, one was pretty shot. So I gotta rebuild them.....
I also brought in a few boards. One scrambled Double Dragon which at first we diagnosed having a bad custom logic chip, but it turned out to be something more confusing. I left it with Raymond to see if he would like to poke around at it, maybe could fix his completely dead Double Dragon board. Also had a CPS-1 Final Fight with a bad A-Board, bad colors and graphics....possibly CPU issue....we salvaged it's z80 for a 4 slotter MVS and got that running, but Raymond gave me a functioning A-board for my Final Fight from this Street Fighter 2 he had laying around. And last I had a TMNT 2 with a bad mask rom, or a more complicated issue with character dialogue audio always tearing......unfixable as far as we are concerned...still plays well though.
Anyways...
Really thankful the others were willing to help give me input and assistance with my list of bad pcbs, chassis, and CRTs. I mean I have a basic understanding of electronics but not so complicated items such as debugging chips with a Logic Probe, using an Oscillscope, erasing and burning EPROMs. All I can say are those still are a work in progress. I want to balance my electronics work with cabinet work though....
Trip was worth it!
-Devin
I had brought 3x 25" tubes, one turned out being a waste and only had a good blue color gun. One checked in as ok. The other needed rejuv and balanced out nicely. I also brought in two U5000 chassis, one from my Daytona and the other i bought as a repacement from Nixs. Both of those turned out to have bad HOTs, one was pretty shot. So I gotta rebuild them.....
I also brought in a few boards. One scrambled Double Dragon which at first we diagnosed having a bad custom logic chip, but it turned out to be something more confusing. I left it with Raymond to see if he would like to poke around at it, maybe could fix his completely dead Double Dragon board. Also had a CPS-1 Final Fight with a bad A-Board, bad colors and graphics....possibly CPU issue....we salvaged it's z80 for a 4 slotter MVS and got that running, but Raymond gave me a functioning A-board for my Final Fight from this Street Fighter 2 he had laying around. And last I had a TMNT 2 with a bad mask rom, or a more complicated issue with character dialogue audio always tearing......unfixable as far as we are concerned...still plays well though.
Anyways...
Really thankful the others were willing to help give me input and assistance with my list of bad pcbs, chassis, and CRTs. I mean I have a basic understanding of electronics but not so complicated items such as debugging chips with a Logic Probe, using an Oscillscope, erasing and burning EPROMs. All I can say are those still are a work in progress. I want to balance my electronics work with cabinet work though....
Trip was worth it!
-Devin
pseeds
Active member
Sounds like a great time. I definitely have to make it to a repair party.
Man that's really cool of you to host a repair party. 
I've always respected your pcb repair knowledge, Channelmanic and it must be awesome for others to be able to watch and learn.
I've always respected your pcb repair knowledge, Channelmanic and it must be awesome for others to be able to watch and learn.
OP
OP
It was a lot of fun hanging out with y'all and working on things!
Devin - That Raiden II that was kicking my ass is RUNNING now. The Seibu custom chip next to the NEC V30 CPU had some popped pins as well. I reflowed them and the CPU and it came right up.
Now I just need to replace a stripped/missing audio chip and fix the sound section. It appears the Z80 isn't running still, but I'll know more after replacing the missing Yamaha chip.
I was happy to help you get that Final Fight up and running. Those A boards are a PITA to work on and since I had a working one it was a no brainer to hook you up with it. (I thought you were going to take that C board from it too?) The bad A board lives on through that Neo Geo 4 slot board.
We'll go over logic probes next time. We'll do another one sometime this fall and I should have the shop better looking/running by then. I'm slowly building a portable JAMMA test bench and think it'll make a good secondary unit on the Kurz Kasch bench.
RJ
Devin - That Raiden II that was kicking my ass is RUNNING now.
The Seibu custom chip next to the NEC V30 CPU had some popped pins as well. I reflowed them and the CPU and it came right up. Now I just need to replace a stripped/missing audio chip and fix the sound section. It appears the Z80 isn't running still, but I'll know more after replacing the missing Yamaha chip.
I was happy to help you get that Final Fight up and running. Those A boards are a PITA to work on and since I had a working one it was a no brainer to hook you up with it. (I thought you were going to take that C board from it too?) The bad A board lives on through that Neo Geo 4 slot board.
We'll go over logic probes next time. We'll do another one sometime this fall and I should have the shop better looking/running by then. I'm slowly building a portable JAMMA test bench and think it'll make a good secondary unit on the Kurz Kasch bench.
RJ
OP
OP
Devin - That Raiden II that was kicking my ass is RUNNING now.
Now I just need to replace a stripped/missing audio chip and fix the sound section. It appears the Z80 isn't running still, but I'll know more after replacing the missing Yamaha chip.
It was having another issue too. It wouldn't coin up. Worked great with no audio in free play mode but no coin up. There's a small Seibu custom chip that the coin up signal goes into and it made it to there but nowhere else. I reflowed it but no change.
Well, I looked it up in MAWS to see what audio chip it used and it's the same Yamaha chip that's on the silly CPS1 A board. I thought "maybe it won't coin up if it can't make the sounds."
Removed it from the A board and installed it... It works perfect. Sound system booted and worked... and coin ups are working.
Sooooo.... 5 reflowed surface mount ICs, replaced 1 missing Yamaha YM2151 sound chip, and patched three gouged traces.
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It was having another issue too. It wouldn't coin up. Worked great with no audio in free play mode but no coin up. There's a small Seibu custom chip that the coin up signal goes into and it made it to there but nowhere else. I reflowed it but no change.
Well, I looked it up in MAWS to see what audio chip it used and it's the same Yamaha chip that's on the silly CPS1 A board. I thought "maybe it won't coin up if it can't make the sounds."
Removed it from the A board and installed it... It works perfect. Sound system booted and worked... and coin ups are working.
Sooooo.... 5 reflowed surface mount ICs, replaced 1 missing Yamaha YM2151 sound chip, and patched three gouged traces.
Awesome! Told you that board will be worth more repaired then scrapping lol.
OP
OP
VectorJunkie
Well-known member
Thanks for hosting the party RJ. I'm going to try and get those EPROMs stacked and installed this week. Hopefully those will get me most of the way to a working board.
kspiff
Well-known member
Forgot about this. Yeah guess I shoulda brought the tubs. Maybe next time you do this I will threadjack you a bit and post a list.
OP
OP
Thanks for hosting the party RJ. I'm going to try and get those EPROMs stacked and installed this week. Hopefully those will get me most of the way to a working board.
Cool, let me know how that goes. Also, look to see what pins are address pins on those EPROMs. I think you'll want to swap around the ones on the address lines to see if you can correct the scrambling.
Go for it. If I'm hosting the party, I don't mind folks bringing over stuff to sell/swap/repair as long as it's legal stuff. HAHAHAHA
Don't want you getting your nick changed to kspliff.
RJ
kspiff
Well-known member
Don't want you getting your nick changed to kspliff.
That is my email address actually, swear to God lol. XD
sandmanx
Member
That looks like it was a better time than the lame party I ended up at yesterday. Next time you have one hopefully I can make it, and I'd love to bring up a few items and learn a nit into how to properly diagnose problems, rather than throwing darts.
VectorJunkie
Well-known member
I may even just wire them on a breadboard or protoboard with sockets since we are not sure it is wired right. Hopefully I can validate the design on paper though and just do it correct the first time.
OP
OP
You could try to read in the data and separate out the objects to see how they are in memory and how they should be put back together.
But it's easier to just swap wires around -
Sandmanx - you're more than welcome to come up here for the next one!
I didn't get to build the presentations and do the teaching I wanted, but will be working on them while out next week so I can get an early run at it for the next party.
RJ
