Cleaning & Repairing a Commodore PET 2001-8C
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.
Defect:
- 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.
What did you use for a tape motor replacement?
@Tim
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)
Hi there
how it works this adapter? I saw that has some pad “A15/A14/A13″…but they must be used?
From what I understand they are useless … they just look like test points
I mean that if I mount a 27C512 on this adapter I have to mount all five resistors and then load the 2KB file in the first memory allocation of the Eprom? Should I replace H5 ..
Thank you!
B.R