Specifications

2.18 ABNORMAL CONDITION IN TONER DENSITY DETECTION
- Phenomenon -
The Auto ID indicator or the selected manual ID level blinks. (No SC Code is
indicated.)
- Definition -
If the Vsg goes below 2.5 volts or Vsp goes above 7.5 volts 5 times in a row.
- Possible Causes -
• Incorrect Vsg voltage
• Dirty ID sensor
• Low toner density
• ID sensor defect
• Main board defect
- Action -
Check the Vsg voltage displayed in the magnification indicator by SP Mode
#55.
5.00 0.00 (Vsg ≤ 2.5 volts)
Is the copy image too light?
No Yes
Refer to Light Copy section.
Is the ID sensor circuit open?
No Yes
Replace the ID sensor and adjust the Vsg to 4.02 ± 0.2 volts.
Replace the main board and adjust the Vsg to 4.02 ± 0.2 volts.
Is the ID sensor surface dirty with toner?
No Yes
Clean the ID sensor with blower brush and/or damp cloth, then
check and/or adjust the Vsg to 4.0 ± 0.2 volts. If toner scattering
occur, correct it. (Refer to Toner Scattering section.)
1 December 1990
6-51