Cleaning & Repairing a Commodore PET 2001-8C

It Works!

This gallery shows some stages of repairing the Commodore PET 2001-8C

Two months have passed since i have received my Commodore PET 2001-8 Chicklet exchanged for a Sharp MZ-80K, was the day 28/08/2013.

The motherboard was in disastrous conditions, it took two months and a lot of patience to repair it.


  • Garbled characters at boot.
  • Tape Recorder (Datassette) Motor Tired.

Replaced parts and various repairs:

A large number of short circuits visible and not visible (under the ic sockets)

  • 2 x 6540 ROM Basic 1.0
  • 2 x 74LS00
  • 3 x 74LS157
  • 1 x 7805
  • 2 x Electrolytic Capacitor / Tantalum.
  • 1 x Tape Motor
  • 16 x 2114 RAM

I want to dwell on the ram, i noticed that the PET 2001-8 Chicklet does not digest very well all ram.

These ram don’t work properly for my PET 2001-8 Chicklet:

  • TESLA 2114 (2/8)
  • MM2214N
  • SY2114-2
  • HKE2114L-2

I had to buy several stocks of ram in 2114 to find the right ram that work correctly. The ram that work very well are the ELCAP 2114L-3.

I have to thank Andrea Pierdomenico for the ROM test on his PET 2001-8C and Alessandro Polito. for the exchange.

  1. Tim
    April 26th, 2019 at 20:34 | #1

    What did you use for a tape motor replacement?

  2. May 1st, 2019 at 00:04 | #2


    HI, i have used a Commodore Tape Recorder with mechanical problem but with a good motor (used for spare parts) see the photo for the model (the white one)