====== 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 =====


^Code^Check These^Code^Check These^
|  A  |6502|  E  |LM311|
|  B  |6522|  F  |582|
|  C  |32530201|  G  |9602|
|  D  |90122905|  H  |32557202|

^  CHECK THESE  ^^^^^^^^  SYMPTOM  ^ 
^6502^6522^32530201^90122905^LM311^582^9602^32557202|   |
^  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