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Page Discussion Repairs

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==Repair issues==
==Repair issues==
Many 468s used Mostek MKB36000 masked ROMs that can suffer from "ROM rot". It may be necessary to replace the 160-0459-01 and 160-0759-01 ROMs with 2764 EPROMs through a 2364/2764 adapter.
→ see [[468/Repairs]] page
Another option might be using the [[MCM68766]] EPROM.
 
<gallery>
468_new_rom.jpeg | replaced ROM by 2764 with homemade 2364/2764 adapter
468_fail_rom.jpg | Result of bad ROM by verification-check.
</gallery>
 
A16 STORAGE-DISPLAY Circuit Board Replacement ERROR in SERVICE Manual Schematic and Parts list (See Repairs)


==Links==
==Links==
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/71513"