Commodore Floppy Disk Drive 1541 Repair (#1)

Defect:

• Motor runs continuously.
• Loading a Program or a Directory freeze the computer.
• Misaligned.

Repair:

• Replace 901229-05 (UB4)
• Replace 7414 (UA1)
• Head Alignment.

Gallery of the repair:

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Commodore Floppy Disk Drive 1541 Repair (#2)

Defect:

• Write Protect Problem.

Repair:

• A wire of the infrared LED was broken. The problem is remove the glue and the heat shrink tube around the LED.

Gallery of the repair:

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Commodore Floppy Disk Drive 1541 Not Repaired (#3/#4/#5)

Defect:

• Don’t read anything.

These Floppy Disk Drive have the Read Head interrupted. This seems to be the most common problem in the Mitsumi (Newtronics) drives.

Gallery:

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Commodore Floppy Disk Drive 1541 Repair (#6)

Defect:

• Loading a Program or a Directory freeze the computer.

Repair:

• Replace VIA 6522 (UC3)

Gallery of the repair:

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Commodore Floppy Disk Drive 1541 Repair (#7)

Defect:

• Loading a Program or a Directory freeze the computer.

Repair:

• Replace 7414 (UA1)

Gallery of the repair:

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Commodore Floppy Disk Drive 1541 Repair (#8)

Defect:

• Motor runs continuously.
• Loading a Program or a Directory freeze the computer.

Repair:

• Replace CPU 6502 (UC4)
• Replace 7414 (UA1)

Gallery of the repair: