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Space Invaders L Shape x 2

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RGP View Drop Down
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    Posted: 18 Apr 2017 at 3:58pm
Recently done a couple more Space Invaders PCB repairs for people - both are Midway L Shape boards.

First:


Essentially a dead 8080 CPU

Second:


CPU's INTE line can't be driven which would cause the INT line to toggle - cause: bad 7474 @ 3E

Also explains Fluke 9010 "CTL ERR" message i'd never come across before.

Enjoy and any questions, happy to help.


Edited by RGP - 18 Apr 2017 at 3:59pm
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Judder View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Judder Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2017 at 4:14pm
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First Year of Supporting ukvac.com!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nes4life Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2017 at 4:36pm
Enjoyed the videos! Keep 'em coming James
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WTD: Centipede or Arkanoid upright or cocktail. Owner of ... too many cabs!
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