🇺🇸 Commodore VIC-20 Refurbish: Part 2 (Case & keyboard cleaning)

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The Clueless Engineer

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Published on March 16, 2024 8:35:31 AM ● Video Link: https://www.youtube.com/watch?v=HVCyvO_3Kks

Duration: 41:13

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Further work on repairing and cleaning up this machine:

[1] The keyboard was disassembled and washed
[2] The three broken keys were fixed (replaced the broken key stems/plungers)
[3] Replaced the original red power LED with a new one - hopefully brighter
[4] Replaced the original power button with a new replacement (Jaycar part SK0975)
[5] Replaced the LM323 linear regulator with a modern switching version (PSU5 No Noise from www.ezsbc.com)
[6] Cleaned the motherboard & case

Close-up of the capacitors for@MrWaalkman at 27:22.

And ... surprise ... when all the chips were re-installed ... it booted! It seemed a little slow (?) so perhaps the 1µF electrolytic capacitor (C13) that determines how long the 555 timer keeps the 6502 in reset is out-of-spec., thus causing the timer to hold the CPU in reset longer ... ?

To be continued ...

Replacement LM323 regulator:
https://www.ezsbc.com/product/psu5-nonoise/

Replacement power switch:
https://www.jaycar.com.au/spst-ultra-mini-rocker-switch/p/SK0975