Commodore CBM 8050 Cleaning and Repair
This gallery shows some stages of cleaning the Commodore CBM 8050 Dual Drive Floppy Disk. Below the defects and replacement parts.
Defect:
- Died – Status LED: RED (5 Flash) Zero page error.
Replacement parts:
- 1 x 6502
- 1 x 6532
- 1 x 6522
- The connectors of write enable sensors are inserted incorrectly.
- Missing +5v on the PCB of the sensor circuit.
- Dirtiness in the write enable sensor drive 0
- Cleaning floppy drive heads.
- Cleaning belt of the floppy drive.
- Removing the filter capacitor.
- The Analog PCB of the Floppy Drive is not fixed properly.
- The Locking screws of the external box are not original.
- Lost the felt which push the Floppy Disk vs the head.
- Disk is present (Switch Motor) dirty.
- General Cleaning.
Test formatting floppy disk:
I have an 8050 dual disk drive for CBM 8032SK. Appears all logic boards are good and passes initial bootup self-test. But when do some DOS command to drives (HEADER command, for example) the motor of R/W head are not move forward. Appears looks like move but don’t rotate properly.
Appears something wrong about steppermotor sequence?
Thanks for advance