It had a security sticker, and an inventory label with a date of March 19th, 1985.
Restauration Works
Restauration was carried out between February and March 2022.
Thorough cleaning of the case. I also removed a security sticker that had been attached by the previous owner. It was very difficult to remove, and unfortunately left a lot of scratchmarks on the bottom shell.
The keyboard membrane connector was broken due to old age, and was replaced.
The faceplate got bent on my attempt to remove it, and was replaced with a new replica one.
Replaced two upper RAM chips that were reported as faulty.
Replaced 7805 with Traco Power TSR-1 DC/DC converter, removed heatsink
Recapping, Composite Mod
Calibrated video output
Known Issues
Output signal has a yellow tint even after calibration. Colors are completely broken. This may be due to the ULA type 5.
Bottom shell of the case has very visible scratchmarks from an old security sticker.
History
2023-03-05:
Replaced LM1889 and recalibrated output. The yellow tint is a bit better now, but the colors are still wrong (e.g. green is looking like blue).
