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Title: UPL Games Post by: channelmaniac on November 29, 2010, 04:21:28 AM Model: XX Mission
Symptom: Missing text and background is garbled. Replaced a bad 2k SRAM to fix the text issue and a 2k SRAM to fix the backgrounds. Replaced 3 bad 64k DRAM chips to fix a color striping issue. Tested game. Board had heat damage to the +5v pins on the JAMMA edge connector. This was caused by excessive current draw from the 3 shorted 64K DRAM chips. Title: Re: UPL Games Post by: channelmaniac on January 16, 2012, 01:04:34 AM Model: Atomic Robo-Kid
Symptom: Dead. Will sometimes power up. Patched a burnt trace then Reseated CPU module. CPU module was not fully seating due to interference from an empty ROM socket next to it. Removed the ROM socket, cleaned up the RTV sealant used to hold the CPU in place, reinstalled the CPU then reapplied new low-fume RTV to hold it in place. Tested. Title: Re: UPL Games Post by: channelmaniac on January 16, 2012, 02:36:18 AM Model: Strahl
Symptom: Lines in graphics Resoldered 2 filter caps with broken solder joints. Cleaned pins on ROM at IC32 and replaced bad SRAM at IC1. Tested. Title: Re: UPL Games Post by: channelmaniac on July 31, 2012, 09:54:46 PM Model: Black Heart
Symptom: Graphic corruption & sound corruption Board had corruption on the title screen and overlay text (scores, etc...) Repaired one trace in the audio section to fix sound issue. Repaired 1 trace and cleaned the legs on a ROM to fix the graphics issue. Tested. Title: Re: UPL Games Post by: channelmaniac on September 06, 2013, 09:10:45 PM Model: Rad Action / Kid Ninja II
Symptom: Random sound effects play Replaced suicided custom CPU with a Z80B CPU and the sound ROM with one programmed with suicide free code. Tested. |