Ricoh A229 Service Manual page 430

SC350-3: ID sensor error 3
-Definition- [D]
For 2 s during the ID sensor pattern check, the ID sensor pattern edge voltage is
not 2.5V.
- Possible causes -
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• Charge or development power pack defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
SC350-4: ID sensor error 4
-Definition- [D]
One of the following ID sensor output voltages is detected at ID sensor
initialization.
1) Vsg < 4.0V when the maximum PWM input (255) is applied to the ID sensor.
2) Vsg ≥ 4.0V when the minimum PWM input (0) is applied to the ID sensor.
- Possible causes -
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• Charge or development power pack defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
SC350-5: ID sensor error 5
-Definition- [D]
Vsg falls out of the adjustment target (4.0 ± 0.2V) during Vsg checking.
- Possible causes -
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• Charge or development power pack defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
SM
SERVICE CALL CONDITIONS
6-7 A229