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Commodore VIC-20 CR Repair

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Trying to repair a badly broken and incomplete NTSC Commodore VIC-20 board.

TFw8b Penultimate Cartridges (I used the +3 dcr here):

https://www.tfw8b.com/product/penultimate/

VIC-20 Diagnostic Cartidge and Harness from Sven Petersen:

https://github.com/svenpetersen1965/VIC-20_Diagnostics

Tynemouth Software Blog about the Diagnostics:

http://blog.tynemouthsoftware.co.uk/2016/05/vic20-diagnostics-user-guide.html

TIME STAMPS:

0:00 Introduction
1:04 Replacing missing Components
11:42 Smoke Test
12:02 Testing Voltages
13:21 Replacing Q4 Transistor
15:38 Testing Socketed ICs
21:03 Just a broken VIC?
25:27 VIC-20 Diagnostic Cartridge
28:41 ROM Fault?
29:29 Bad Diagnostics?
36:28 Thank you & Good night

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    • #JanBeta #Commodore #VIC20 #VC20 #Repair #Troubleshooting #DeadTest #Diagnostic #VIC #RetroComputing #VintageComputing #NTSC #PenultimateCartridge

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