Do you have a defective / non working Commodore 64 breadbin?
I probably want it!
Make me an offer on gert@dabbler.dk and state if you want to sell it or swap it for this working one (you will have to pay my costs in parts and shipping – but not my time) 🙂
Purchased 22th August 2017 on eBay:
- Breadbin: SER.NO.U.K.B1717794
- Motherboard: S/N 938896, assy No. 250407, artwork no. 251137, rev. B. Made in Hong Kong
Chips:
- U1: CIA, MOS 6526, week 25, 1984
- U2: CIA, MOS 6526, week 19, 1984
- U3: BASIC ROM, MOS 901226-01, week 25, 1984
- U4: Kernal ROM, MOS 901227-03, week 24, 1984
- U5: Character ROM, MOS 901225-01 (no week and year)
- U6: Color RAM, MM2114N (no week and year)
- U7: CPU, MOS 6510, week 29, 1984
- U17: PLA, MOS 906114-01, week 22, 1984
- U18: SID, MOS 6581, week 25, 1984
- U19, VIC2, MOS 6569R2, week 25, 1984
- RAM, 8*Mitsubishi Electric M5K4164ANP
Sellers description:
Commodore 64 keyboard.
No other items with this.
I have confirmed the power light lights up when plugging my power pack in.
2 loose buttons, included. Can be glued back on.
Repair log:
- 4 loose buttons (F1, +, C= and Run/Stop). Replaced plundgers
- Plastic screw holes for motherboard damaged. Repaired/recreated/strengthened with hot glue
- Cabinet screw holes damaged. Repaired/recreated with hot glue
- F7/F8 not working – broken trace on keyboard PCB repaired
- U25 (MOS7708, week 23, 1984) defective. Black screen but with video sync. Replaced with HD74LS257P. Board hard do desolder on because of corrosion, so damaged 3 tracks. Those repaired with wires.
Work in progress:
- 1 wobling button (V). Glue half broken plundger if possible – otherwise replace
- Cleaning
- re-capping motherboard/RF-module
- Heatsinking larger MOS chips
- Overvoltage protection on motherboard (P6KE6.8CA)
- Build a PSU
Costs (total DKK 800):
- Breadbin: DKK 400,-
- Plundgers: DKK 75,-
- PSU (transformator, wire, connector): DKK 225,-
- Misc.: DKK 100,-
Let me know if you will buy it for my costs when it is done 🙂