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).

Printing fails, large non-printed area

Cause	Corrective measure
Print head tubes are bent, preventing supply of ink.	Correct the bent tubes.
Head joint (sealing valve) is closed, preventing supply of ink.	Open the ink valve (sealing valve).
There is a problem in the print heads.	Replace the print heads.
Three is a problem in the Head driver PCB or ORIP PCB.	•Check and correct the connections for all connectors of the PCBs indicated to the left. •Replace the PCBs indicated to the left.
Defective vacuum operation due to disconnected suction tube (head maintenance not possible)	Correct the disconnected or bent tube of the suction pump or suction chamber.
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.
Defective Controller(PS7R)	Correct the Controller(PS7R) problem.

White streaks

Cause	Corrective measure
•The print heads do not eject ink correctly. •Infrequently generated white streaks that can be eliminated by head maintenance is regarded as part of normal machine operations. It is not possible to completely eliminate in the inkjet system.	•If the problem is due to misfire/non-perpendicular ejection, perform a normal cleaning. •If the normal cleaning does not correct the problem, select the misfiring color, and perform a thorough cleaning. •Clean the ejection nozzles using a wipe stick. •Replace the print heads.
•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
•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.

The printed color is too dark, or the ink runs.

Cause	Corrective measure
•Paper with low ink absorption is used in a print mode involving a large number of drops.	•Use the appropriate media/print mode.
•Prints are made on the wrong side of the paper, due to incorrectly set paper (especially when using coated paper).	•Set the paper correctly.
•The paper being used is unsuitable	•Use the appropriate media/print mode.
•The print density setting is too high	•Reduce 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.