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Repaired for a friend a Commodore CBM 8296 Motherboard

Repaired for a friend a Commodore CBM 8296 Motherboard.

Defect:

  • Black screen of death without startup beep.

Replaced parts:

  • Replaced PLA [UE6] with a OTP EPROM 27C512R 70ns + Adapter.
  • Replaced PLA [UE5] with a original one MOS 324744-01
  • Replaced [UC8] 3-State Driver Bus MOS 65245 (74LS245)

  1. dr. b
    March 13th, 2014 at 11:44 | #1

    bought a ‘DEAD’ SX64 from ebay <>. the video
    screen lit up but no data whatsoever. i use to do repairs on all commodore products back in
    the 80′s <>. i did not have lots of time to do TRIAL & ERROR by swapping out
    IC’s so i just popped in the primary chips to get a quick idea of what was ‘gone’. when i was
    at Rockwell i had access to all kinds of amazing equipment which allowed me to read all kinds
    of computer chips. so i made copies of the C64 PLA chip for my self. well i plugged in a PLA as
    well as the 6567 video chip and a 6510 cpu. wala. i now have a mint condition working SX64.
    take care & thanks for the opportunity allowing ‘us’ to “EXPRESS OURSELVES” .

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