User Manual

Table Of Contents
223
2900H EN 20071108 Troubleshooting
DRYSTAR 5500/5503 REFERENCE MANUAL
White dots or lines appear in the transport direction
If fine white dots and one or more fine white lines appear in the transport
direction (mostly due to dust infiltration), try the following remedies:
1 Clean the print head resistor line.
Refer to ‘Print head cleaning’ on page 115.
2 If dust stripes remains visible, clean the dust roller.
Refer to ‘Cleaning the dust rollers’ on page 188.
3 Print a few test sheets using the ‘Print test image’ function.
Refer to ‘Printing test images from the hard disk’ on page 101.
4 If the white lines are still visible, contact your local service organization.
Low frequency banding
If you notice density non uniformity (low frequency banding) in the print
head direction, perform print head profile calibration.
Refer to ‘Print head profile calibration’ on page 118.
Use a lint free cloth, slightly moistened with Isopropyl alcohol or Ethanol.
As the rollers are sticky it’s very important to use a lint free cloth!
Never clean the roller with water or soap.