Ricoh D104 Field Service Manual page 666

6. Troubleshooting
Cause 8: Bk Grainy Image on High Smoothness Paper
The black solid image may become grainy on the high smoothness paper when the black solid area is
printed in the full color printing mode. This is because the transfer current for the full color printing is
excessive for the high smoothness paper. (Basically the transfer current for the monochrome printing is
lower than the transfer current for the full color printing.)
Action Procedure
• Select "CMY+K" with the PCL printer driver. For details, see "Action 1" described below.
Action List
Action 1
With this setting for PCL, all BW images are printed using process black, including text.
Action Procedure
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• Select "CMY+K" with the PCL printer driver. (Print Quality -> Color: Manual -> Gray reproduction ->
CMY+K)
Action 2A
Changing the PTR current for each paper type can solve the grainy image for the 1st side of paper.
Action Procedure
1. Increase the PTR current for the 1st side of paper in steps of 2 A until +6 A from the default value.
• B/W mode/ Normal speed: SP2-403-001
• B/W mode/ Low speed: SP2-403-003
• Full Color mode/ Normal speed: SP2-407-001
• Full Color mode/ Low speed: SP2-407-003
2. If the grainy images get worse, decrease the PTR current in steps of 2 A until -6 A from the default
value.
3. If the grainy images only occur when using a specific type of paper, set the Paper Type setting to one
of the Special Paper settings as follows.
- If the current Paper Type setting is one of the following, change it to Special Paper 1.
• Plain Paper 1, Plain Paper 2, Middle Thick, Thin Paper, Coated Paper: Gloss
Select Special Paper 1, then adjust the settings of the following SP modes:
• B/W mode/ Normal speed: SP2-753-001
• B/W mode/ Low speed: SP2-753-003
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