Technical Bulletin  PAGE: 1/2 
Model: Taurus-C1a/C1b (D074/D075) 
 
Subject: Troubleshooting black streaks along feed direction  
on back side 
Prepared by: Yasutaka Yamada 
From: 1st PP Tech Service Sec., PP Tech Service Dept., 
 Mechanical 
 Paper path 
 Product Safety  
 Electrical 
 Transmit/receive 
 Other (          ) 
 Service manual revision 
 Retrofit information 
 Tier 2 
 
SYMPTOM 
Black streaks (along the feed direction) appear on the back side. 
The symptom usually occurs on the 1st and 2nd sheets of a job. 
 
The symptom is observed in the area circled in red.