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Author Topic: Jamma Interchange  (Read 3269 times)
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xcaliber
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« on: March 01, 2015, 03:14:27 pm »

I have been looking for a Mortal Kombat one PCB and found one this weekend. Actually a friend of mine gave me a MK1 pcb (no audio board). He said he didn't think it worked, but I might get lucky if I pull and seat the chips. So I pulled, cleaned, and set the chips. Plugged it in to my Great 1000 Mile Rally cab and the screen is blank. I pulled the pcb and plugged my Time Killers in and got a blank screen. I know my Time Killers worked a couple of weeks ago, but I sold the cab that it was in and the MK1 cab I have is currently empty waiting for me to paint. Did I miss something? Shouldn't my Time Killers at least show a picture? Thanks in advance for any help.
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iankellogg
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« Reply #1 on: March 01, 2015, 03:35:23 pm »

Jamma is interchangable. so if it isn't working then there is something else wrong.

Rule 1: Check power supplies.
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xcaliber
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« Reply #2 on: March 01, 2015, 03:47:13 pm »

Power supply giving 5.1 for +5 and 9.99 for +12
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iankellogg
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« Reply #3 on: March 01, 2015, 03:49:00 pm »

that isn't good. is that with the game pcb plugged in.
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xcaliber
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« Reply #4 on: March 01, 2015, 04:11:42 pm »

No.
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xcaliber
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« Reply #5 on: March 01, 2015, 04:17:03 pm »

Checked while the game is running and 4.99 and 11.96
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iankellogg
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« Reply #6 on: March 01, 2015, 04:45:26 pm »

sounds good to me. does the game play blind at least?
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VertexGuy
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« Reply #7 on: March 02, 2015, 03:43:35 am »

try this.......
Does that Jamma harness/cab  have neg 5 v >?
Mk needs that voltage.
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xcaliber
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« Reply #8 on: March 02, 2015, 05:16:11 pm »

It does on the solder side, but not on the component side. No sound either Ian.
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