Assy 250469 Rev. 4 #1

This is an Assy no. 250469 Rev. 4 short board. The machine would start up with garbled characters across the middle section of the screen.



I suspected that the character rom was causing the problem. I therefore removed the chip, and soldered in a socket and replaced the old character ship with a known good one.



And the machine was working again.


© 2015

2 comments on “Assy 250469 Rev. 4 #1

  1. What is the specifications of the F1 (fuse) in ASSY-NO.250469 / PCB-NO.252311 / REV.4 model?

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