Ricoh M022 Service Manual page 716

6. Troubleshooting
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
6
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.
714
CÓPIA NÃO CONTROLADA
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 SP2-185-001.
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.
CÓPIA NÃO CONTROLADA