Thanks very much! I have a few C64 too, I dismantled and cleaned all. I have 6 now... Can I call it Commodore fewer?! One of the breadbin had a problem (the switch was bad... but i soldered it until i can replace that). After power on the characters appeared in rainbow color, so i checked the color sram, but that was good, so i changed the PLA, and now it's working too. I need a new PLA now, but until that i experiment with an EPROM based solution.
I'm using uno2iec (arduino based drive emulator) to connect my C's to the PC, i want to improve that with an sdcard, and i want to make some custom cartridges to experiment. I will try to make music with the SID, so that will be my next project (analog synth with SID, and so on), so i have a few idea.
You know, i had a very bad feeling when i bought this C128 DCR and it arrived with a non working drive. I was disappointed... I start to collect Commodore stuff this year, and i have some background in electronics (hobby level), but i really like to repair these machines. It's very good when something working again.
I have a few 45ns W27C512 EEPROM now, so i will try to replace the bad PLA in one of my C64, so this will be the next step.