Ricoh D104 Field Service Manual page 649

Test pattern check
White image, Abnormal image,
Low density
Normal image, but with color
registration errors
After Executing SP2-111-001
• Result: "1" in SP2-194-007
• Result: "4" (Out of adjustable range) in SP2-194-010, -011, -012
Test pattern check
Low image density on the output
The main scan registrations of M, C, Y
are shifted by more than ±1.4 mm from
the main scan registration of K.
Possible cause/Countermeasure
• Defective image processing unit
• Low density of test pattern
• Defective BCU
1. Replace the high voltage power supply unit.
2. Do the forced process control (SP3-011-001) or supply
some toner (SP3-015-xxx).
3. Replace the BCU.
• Defective ID sensor
• Defective BCU
1. Replace the ID sensor.
2. Replace the BCU.
Possible cause/Countermeasure
• Low pattern density
Do the forced process control (SP3-011-001) or supply some
toner (SP3-015-xxx).
• No defective component
• Defective laser optics housing unit
• Defective BCU
1. Do SP2-111-003 again.
2. Replace the laser unit.
3. Replace the BCU.
Troubleshooting Guide
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