THE 1541 FIXER

BY BILL DUN

Note: this information is presented without warantee or gaurantee to it's reliability or effectiveness. Nor does it imply that these methods will work or are the only ones possible.

Reprinted from the Commodore Club of Rockford Newsletter - March 1993

QUICK CHART

CodeCheck TheseCodeCheck These
A 6502 E LM311
B 6522 F 582
C 32530201 G 9602
D 90122905 H 32557202
CHECK THESE SYMPTOM
650265223253020190122905LM311582960232557202
A C D ERROR LED STATUS ON ALL THE TIME
B DRIVE MOTOR RUNS ALL THE TIME AND LED STAYS ON
A D DRIVE MOTOR RUNS ALL THE TIME AND LED STAYS OFF
B AFTER WARM UP, MOTOR RUNS ALL THE TIME
D E DOES NOT LOAD WHEN HOT OR LED FLASHES 3 TIMES
D SEARCHES WITH LED FLASHING CONTINUOUSLY
C SEARCHING WITH NO RED LED
F G H DRIVE FAILS TO READ
B H FAILS TO FORMAT DISK
A B STEPPER MOTOR DOES NOT STEP FORWARD
A WILL NOT SAVE WHEN DRIVE HEATS UP
D LIGHTS STAY ON, MOTOR RUNS CONTINUOUSLY

OTHER SYMPTOMS

NO LED'S ON POWER UP

  • FUSE & POWER SWITCH
  • +5/12 VOLT LINES
  • POWER CORD

FLASHES ON POWER UP

  • ALL RAM & ROM'S

DRIVE MOTOR RUNS WITH NO RED OR GREEN LED'S

  • VR2 POWER TRANSFORMER

LOADS PROGRAMS WITH RED LED FLASHING

  • DRIVE SPEED
  • STEPPER MOTOR

LOADING INTERMITTENT

  • ALL ROM'S
  • DRIVE ALIGNMENT

MESSAGE OF "FILE NOT FOUND"

  • CLEAN DRIVE
  • HEAD-0 STOP
  • ADJ.-ALIGNMENT

DRIVE SPEED IS NOT STABLE

  • DC MOTOR

LOCKS-UP WHEN LOADING

  • 901229-05

FAILS THE PERFORMANCE TEST & DISPLAYS ERROR 21

  • CHECK TEST DISK
  • DRIVE MOTOR

FAILS THE PERFORMANCE TEST & DISPLAYS ERROR 27

  • STOP ADJUSTMENT

PASSES PERFORMANCE TEST TO TRACK 18 DISPLAYS ERROR 21

  • READ/WRITE HEAD

PASSES PERFORMANCE TEST BUT WILL NOT LOAD PROGRAMS

  • STEPPER MOTOR

FLASHING LIGHT ON & OFF DURING LOADING

  • ALIGNMENT
Last modified:: 2020/11/22 09:08
   
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