Nice looking early C64 with brown function keys
I always take the lid off and inspect before power on.. You never know what you might find.
Can you spot whats
Is this a model below the VIC-20.
I used a Commodore Diagnostic cartridge to identify what chip was down. You can never completely believe what these things
diagnose, as something else on the PCB could be causing the problem. And that's why I use a Oscilloscope, Anywho, the
scope didn't look right on U9, so I clipped it out.
Memory chip removed. This sort of PCB is rather like the Sinclair Spectrum PCBs. Not much solder resist to hold the tracks
in place. Thats why I cut the pins off before desoldering.
I installed a socket so I could test different memory chips as I've got a handfull I removed from another machine
For a quick test I plugged in a cartridge.. All good.. Well no..
So thats why I had to remove the other 6526 so I could test it in another system. Gave me a chance to clean up from 1988's
champion of burnt flux. I also changed a 4066 @U28 as that had failed a test and was easy to swap for a new one.
The bad news was it is still popping fuses at this point.
Happy days, my hunch was correct. No more popped fuses, and the diagnosting harness and cartridge no longer reports spurious
Four chips replaced (red dots), the 4066 wasn't faulty but I'm not about to remove it for fun. Added
heatsinks to keep those chips alive for a bit longer! Do this to your SID, before it overheats and dies!
Already played, sorry tested the tape port with R1D1. Now I'm loading Creatures II via my 1530 Sd2IEC conversion..
Worth the hassel? I think so, the owner of this C64 bought it brand spancing new back in 83ish. All
it needed was a 6526 one 4164 a 6510 and a bunch of capacitors and someone mad enouth to fix it!
Any excuse for a quick game of Ghosts and Goblins!