Resources

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PET FAQ
oldcomputr.com
Commodore PET History

Documents

Internals

Motherboard

This motherboard had a number of faults: a few broken TTL chips, one RAM chip and UE6 PLA chip. Identification of broken RAM and ROM is very easy using Tynemouth PET RAM/ROM board, which I strongly recommend. Broken UA5 and UA6 PLA chips can be replaced with a 27512 EPROM/EEPROM with an adapter that changes the pinouts.

Analog Board

Power Transformer

Keyboard

CRT

Reassembly