Ricoh A230 Service Manual page 350

SERVICE CALL CONDITIONS
SC350-2: ID sensor error 2
-Definition- [B]
The ID sensor output voltage is 5.0V and the PWM signal input to the ID sensor
is 0 when checking the ID sensor pattern.
- Possible causes -
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
SC350-3: ID sensor error 3
-Definition- [B]
The ID sensor pattern edge voltage is detected to be not 2.5V twice
consecutively during an 800 ms interval.
- Possible causes -
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
SC350-4: ID sensor error 4
-Definition- [B]
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
• High voltage supply board defective
• Dirty ID sensor
• Defect at the ID sensor pattern writing area of the drum
A230/A231/A232
7-6
SM