Ricoh MP C6502SP Field Service Manual page 1390

5. Troubleshooting
Cause
Some carrier particles inside newly-installed developer have a relatively high electrical potential.
These particles may be transferred to the OPC in non-image areas as well, and then fall off before
image transfer. As a result, a white spot is developed on the image.
If these carrier particles are transferred to the ITB, toner around the carrier drops off, forming a
black spot.
Solution
Do the following.
D137/D138:
Execute "Adjust Image Density" (0201-01) inside the Skilled Operator Settings.
• This is effective when the development gamma is low (about 0.8 or less) or the OPC electric
potential is high, such as in low-temperature, low-humidity environments.
D135/D136:
Execute "Density Adjustment Process Control" by tapping the following buttons: [User Tools/
Counters] – [Management] – [Auto Color Calibration].
• This is effective when the development gamma is low (about 0.8 or less) or the OPC electric
potential is high, such as in low-temperature, low-humidity environments.
• After you do this, color calibration is optional.
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