Technical Bulletin  PAGE: 1/1 
Model: Taurus-C1/P1 (D074/D075/M044) 
 
Subject: Field Service Manual Correction (SC465) 
From: 1st Tech Service Sect., PP Tech Service Dept. 
 Mechanical 
 Paper path 
 Product Safety  
 Electrical 
 Transmit/receive 
 Other (          ) 
 Service manual revision 
 Retrofit information 
 Tier 2 
Please add the following detail information on the sub codes of SC465 to your FSM in 
section: 
 
Appendices  6. Troubleshooting  SC Tables  SC400: Around the Drum 
 
Details (Symptom, Possible Cause, Troubleshooting Procedures) 
PTR Motor Error: Abnormal Pulses 
One (or both) of the encoder sensors cannot correctly detect the 
pulses. 
  PTR motor harness disconnected or broken 
  Physical obstruction blocking operation of the PTR unit 
  Motor or motor drive board defective 
  TDCU defective 
PTR Motor Error: Motor Defect 
Motor is physically broken or harness is disconnected. 
  Motor harness disconnected or broken 
PTR Motor Error: Abnormal Rotation Speed 
The rotation speed of the motor is not within the target range. 
  PTR motor harness disconnected or broken 
  Physical obstruction blocking operation of the PTR unit and 
ITB cleaning unit 
  TDCU defective 
  PTR motor defective 
PTR Motor Error: Continuous Heavy Load 
The motor is turned off after detecting excess load for more than 
ten seconds. 
  PTR motor harness disconnected or broken 
  Physical obstruction blocking operation of the PTR unit and 
ITB cleaning unit 
  TDCU defective 
  PTR motor defective