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| | |-+  Konami Repairs
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Author Topic: Konami Repairs  (Read 27083 times)
channelmaniac
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« Reply #50 on: September 06, 2013, 08:44:15 PM »

Model: Gyruss
Symptom: No sound. Missing heatsinks. White line on top of screen.

Replaced bad audio amplifier and 4 100uf capacitors. Installed 2 heatsinks. Resoldered pulled cap on IC at A6 and cleaned the legs on the 3 PROMs to fix the video issue. Tested.
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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
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Total Karma Storms: 568
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Gender: Male
Posts: 2127


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


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« Reply #51 on: September 07, 2013, 11:59:51 PM »

Model: Track and Field
Symptom: Corrupt graphics and speech.

Cleaned the speech ROM's legs and replaced the corroded socket. Jumpered a gouged trace on pin 2 of the 2128 SRAM chips. Tested.
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
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Total Karma Storms: 568
Offline Offline

Gender: Male
Posts: 2127


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


WWW
« Reply #52 on: September 12, 2013, 11:35:47 PM »

Model: Track and Field
Symptom: Dead

Cleaned pins on the CPU and replaced bad socket. Cleaned pins on the ROMs at A1/A2. Board booted but had corrupt graphics. Replaced a bad 74LS377 to fix the graphics corruption. Graphics were misplaced horizontally and runner would run off the right side of the screen during the long jump on attract. Replaced 74LS08 @ 2F which had a dead output. Replaced 74LS139 at 14D which had a dead output to fix the graphics misplacement. Replaced bad 74LS273 at 13E to fix a background color problem. Tested.
Logged

I have too many hobbies! Electronics, gunsmithing, Miatas, arcade games, metal detecting, etc...

http://www.arcadecomponents.com
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