T
echnical
B
ulletin
PAGE: 1/2
Model: Shepherd-Lt
Date: 6-Sep-19
No.: RM0D4010
subject: Troubleshooting “Color Misalignment”.
Prepared by:
D.Kobayashi
From:
Regional Sales Department, Global IP Sales Center
Classification:
Troubleshooting
Mechanical
Paper path
Part information
Electrical
Transmit/receive
Action required
Service manual revision
Retrofit information
Product Safety
Other (
)
Tier 2
Tier 0.5
Troubleshooting information is added
Please apply the correction of this RTB to your Pro TF6250 field service manual, in
following section:
6. Trouble shooting>Image Quality>Color Misalignment
Additional information is in
Red.
Symptom
The ink drop position is misaligned between color nozzles.
Cause
The print head gap is not correct (0.8 to 1.5mm)
Vertical calibration misalignment
The print head is inclined.
Print head front and back misalignment
The ink drop position of the first/second/third row of the print heads are misaligned.
Color offset misalignment
The ink drop position is misaligned among the color nozzles in the Y direction.
Adhesive material on X-axis and Y-axis encoder sheet
Action
Perform the following adjustment
Carriage Original Height Position Adjustment
Print Head Slant Adjustment
Print Head Front and Back Position Adjustment
Color Offset Adjustment
Wipe the dirty encoder sheet with a dry cloth
