Ricoh D104 Field Service Manual page 651

Test pattern check
The main scan registration of K is
shifted.
The main scan length of K is shifted.
After Executing SP2-111-001
• Result: "0" in SP2-194-007
• Result: Color registration errors in SP2-194-010, -011, -012
Test pattern check
Low image density on the output
The main scan registration is shifted, but
only at the central area of the image on
the output.
The main scan registrations of M, C, Y
are shifted.
Possible cause/Countermeasure
• Abnormal SP setting value of main scan: K
Adjust the value with SP2-101-001.
• Abnormal SP setting value of main scan length detection:
K
Adjust the value with SP2-102-001 and -003.
Note:
The setting value of these SPs should be same.
Possible cause/Countermeasure
• Low pattern density
Do the forced process control (SP3-011-001) or supply some
toner (SP3-015-xxx).
• Defective ID sensor at center
• Deformed center area on the image transfer belt
• Defective BCU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BCU.
• Defective laser optics housing unit
• Defective ID sensor
• Defective BCU
• Incorrect SP value
1. Replace the laser optics housing unit.
2. Replace the ID sensor.
3. Replace the BCU.
4. Adjust the value with SP2-182-004 to -021.
Troubleshooting Guide
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