Riso HC5500

Procedure for responding to printing problems

1. Check that the SE mode settings, mechanical settings and printer driver settings match with the media which causes the error.
2. Check whether the operating condition is within the specification.
3. Activate SE mode, select the test pattern and printing mode necessary to examine the problem, and output the test pattern.
4. If necessary, output the user data and other test charts brought with you.
5. Take corrective measures by referring to the following troubleshooting chart.
6. Refer to the contents of the technical manual for troubleshooting the misfire (MF).

The color is too light or uneven.

Cause	Corrective measure
•The paper being used is unsuitable	•Use the appropriate media/print mode.
•The conditions of the operating environment are unsuitable.	•Confirm that room temperature and humidity are within the permissible ranges. 10 to 30 degrees Celsius 40% to 70% RH
•Paper (such as coated paper) with a high ink absorption rate is used in a print mode that produces a small number of drops.	•Set the print mode suitable for the type of paper in use.
•The print density setting is too low.	•Increase print density.
•Ink problems	•Replace the ink if it appears defective. •Since degraded ink remaining in the ink passages may cause problems, replace the main ink passage components, if necessary.

Vertical lines are not straight.

Cause	Corrective measure
•Incorrect adjustment	Perform image adjustment.
•Transfer belt skew	•Adjust the belt tension. •Replace the transfer belt. •Replace the transfer unit.
•Machine alignment is slightly distorted due to an uneven installation surface.	•Adjust the adjustment screw on the front side. •Set up the machine on a flat surface, and perform image adjustment if necessary.

Horizontal lines are not straight.

Cause	Corrective measure
•Incorrect adjustment	•Perform image adjustment. •(For more information, refer to section 2 in this chapter.)
•Defective belt encoder (located inside the transfer belt unit)	•Correct installation conditions for the belt encoder. •Replace the belt encoder.

Printing irregularities

Cause	Corrective measure
•Incorrect adjustment	•Perform image adjustment. •(For more information, refer to section 2 in this chapter.)
•Analog ink remains in the ink passage.	•Perform a thorough cleaning. •Replace the reservoirs. •Replace the ID units.
•Ink problems	•Replace the ink if it appears defective. •Since degraded ink remaining in the ink passages may cause problems, replace the main ink passage components, if necessary.

Color mismatching/abnormalities

Cause	Corrective measure
•Printing results differ from the colors displayed on the monitor.	•Due to differences between the RGB and CMYK color systems, printed colors may not be identical to the colors displayed on the monitor. Adjust the application and RIP settings to achieve optimum color matching.
•Analog ink remains in the ink passage.	•Perform a thorough cleaning. •Replace the reservoirs. •Replace the ID units.
•Ink problems	•Replace the ink if it appears defective. •Since degraded ink remaining in the ink passages may cause problems, replace the main ink passage components, if necessary.

Contaminated printed surfaces (in single-side printing)

Cause	Corrective measure
•Contaminated paper transport path for single-side printing.	•Contaminated registration rollers Clean •Contaminated cleaning roller (periodic replacement after 250,000 prints)