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Author Topic: Unico games  (Read 5697 times)
channelmaniac
Surface mount soldering geek
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Few things are better than fixing an old game...


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« on: December 02, 2010, 04:27:40 AM »
Model: Zero Point
Symptom: Corrupt Graphics

Patched a bad trace to fix background graphics. Removed a short between pins of 2 adjacent 74LS161 counters to fix text misplacement issues. Replaced 2 bad SRAMs to fix foreground graphics corruption.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #1 on: December 02, 2010, 04:32:48 AM »
Model: Zero Point
Symptom: Garbled Audio

Board is NOT JAMMA compatible for audio output. It is wired similar to the Neo Geo MVS stereo outputs.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
channelmaniac
Surface mount soldering geek
Global NLG Site Moderator
Sr.Tech NLG Member 1000+ Post
*

Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2126


Few things are better than fixing an old game...


WWW
« Reply #2 on: December 14, 2010, 03:36:07 AM »
Model: Zero Point 2
Symptom: Dead

Replaced 2 bad program EPROMs and one damaged socket. Board would then work but lock up if board was tapped. Resoldered the surface mount 68020 CPU to fix the lockups. Board has graphic corruption on the foreground graphics. Replaced 4 bad SRAM ICs to fix foreground graphic corruption.
Logged
I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
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