Ricoh G188 Service Manual page 381

Test pattern check
Others
After Executing SP2-111-003
Result: "1" in SP2-194-007
Result: "0" in SP2-194-010, -011, -012.
Test pattern check
After Executing SP2-111-001
Result: "1" in SP2-194-007
Result: "2" or "3" (Line pattern detection failure) in SP2-194-010, -011, -012
Test pattern check
White image, Abnormal image,
Low density
Normal image, but with color
registration errors
SM Appendix
Possible cause/Countermeasure
Skew correction upper limit error
Defective BCU
Defective laser optics housing unit
1. Replace the BCU.
2. Replace the laser optics housing unit.
Possible cause/Countermeasure
Do SP2-111-001 or -002.
Possible cause/Countermeasure
Defective laser optics housing unit shutter
Defective image processing unit
Low density of test pattern
Defective BCU
1. Replace the shutter motor.
2. Replace the high voltage power supply unit.
3. Do the forced process control (SP3-011-001) or
supply some toner (SP3-015-xxx).
4. Replace the BCU.
Defective ID sensor shutter
Defective ID sensor
Defective BCU
1. Replace the ID sensor shutter solenoid.
5-5
Troubleshooting Guide
G188/G189