Id Sensor Error Analysis (Sp2-221) - Ricoh Aficio 220 Service Manual

SERVICE PROGRAM MODE

4.2.17 ID SENSOR ERROR ANALYSIS (SP2-221)

[Serviceman P-Mode]
Vsg-Vsp: 2.98V
Even if the ID sensor is defective, the machine does not generate an SC condition.
If the ID sensor is defective, the image quality becomes worse (e.g., dirty
background on the copy). If these conditions occur, check the ID sensor output
using this SP mode.
1. Vsg
Error Condition: Vsg < 2.5V
Possible causes:
• ID sensor defective
• ID sensor dirty
• Drum does not get charged
2. Vsp
Error Condition: Vsp > 2.5V
Possible causes:
• Toner density is very low
• ID sensor pattern is not created
3. Power: This is the power for the light source in the ID sensor
Error Condition: Vsg < 3.5V when maximum power (254) is applied
Possible causes:
• ID sensor defective
• ID sensor dirty
• Drum does not get charged
4. Vsg-Vsp
Error Condition: (Vsg – Vsp) < 1.00V
Possible causes:
• ID sensor defective
• Drum dirty
5. Vt
Error Condition: Vt > 4.5V or Vt < 0.5V
Possible causes:
• TD sensor defective
A265/A267
Vsg: 4.01V Vsp: 1.09
Vt: 2.3V
Power: 65
A265M510.WMF
4-80
20 September 1999
SM