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PLEASE DO NOT UPLOAD COPYRIGHTED EPROMS TO THE SITE!!!
User Accounts Older than 1 day "24 Hours" with a zero “0” post count Will be Deleted and treated as a SpamBot.
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+  Forum
|-+  NLG Members who host their own Repair Logs of Various Games.
| |-+  NLG Users Repair Log's (Moderator: channelmaniac)
| | |-+  Multicade Boards - 48 in 1, 60 in 1, Etc.		 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Multicade Boards - 48 in 1, 60 in 1, Etc.  (Read 2514 times)
arkanoid
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« on: September 09, 2009, 03:11:32 PM »
    Symptom: No video.  Red LED flashes when powered.
    Diagnosis: EPROM not making good contact
    Repair: Remove/reseat 27C4096

    Symptom: No audio.  (User applied -5V on 12V line?)
    Diagnosis: C47 (470uf, 16v) bad, audio amp bad
    Repair: Replaced C47, replaced TDA2003
« Last Edit: September 09, 2009, 06:50:32 PM by channelmaniac » Logged
channelmaniac
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Few things are better than fixing an old game...


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« Reply #1 on: September 09, 2009, 06:51:56 PM »
Thanks for logging that!

The EPROM holds run time code for the FPGA chip on the board. All the games are kept on a surface mount flash chip under the plastic cover.

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

http://www.arcadecomponents.com
StatFreak
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« Reply #2 on: September 09, 2009, 06:59:57 PM »
Welcome to NLG arkanoid wave and K+ for logging a repair tip as your first post!  applause
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