Ricoh D104 Field Service Manual page 669

2. If the grainy images get worse, decrease the correction value of the PTR current for each paper size
in steps of -10% against the default setting for each SP mode until -30% against the default setting of
each SP mode.
If the special paper setting which is proper for this action procedure has already been used for the other
paper setting, change the following SPs of non-special paper types.
• B/W mode for Special 1, 2 and 3: SP2-761-005 to -020
• Full Color mode for Special 1, 2 and 3: SP2-762-005 to -020
• B/W mode for Special 4, 5 and 6: SP2-791-005 to -020
• Full Color mode for Special 4, 5 and 6: SP2-792-005 to -020
Action 5
Decreasing the target gamma for the developer can solve the grainy image.
Action Procedure
1. Change the setting of SP3-611-009 from "0.90" to "0.85".
2. Execute the SP3-011-001.
Action 6
Decreasing the transfer current values for the ITB roller and PTR can solve the grainy image in the BW
printing mode. However, decreasing the transfer current of the ITB roller affects other settings (paper
type and size) and may cause a light toner image for some paper type and size.
Action Procedure
Change the settings of SP2-351-001 by -2 A or SP2-351-003 by -1 A.
1. Decrease the transfer current of the PTR for each paper type by 1 A until -4 A from the default
setting.
• B/W mode/ Normal or low speed for Plain Paper: SP2-403-001 to -004
• B/W mode/ Normal or low speed for Thin Paper: SP2-453-001 and -003
• B/W mode/ Low speed for Glossy Paper: SP2-482-001
• B/W mode/ Low speed for Thick 1: SP2-502-001
• B/W mode/ Low speed for Thick 2: SP 2-553-001
• B/W mode/ Low speed for OHP: SP 2-603-001
• B/W mode/ Low speed for Thick 3: SP 2-651-001
• B/W mode/ Normal or low speed for Middle Thick Paper: SP2-703-001 to -004
• B/W mode/ Normal or low speed for Special 1 Paper: SP2-753-001 to -004
• B/W mode/ Normal or low speed for Special 2 Paper: SP2-803-001 to -004
Troubleshooting Guide
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