SERVICE CALL CONDITIONS 19 January, 2001
4-4
Code No. Symptom Possible Cause
ID sensor pattern test error350 C
• One of the following ID sensor output
voltages was detected twice
consecutively when checking the ID
sensor pattern.
1) Vsp ≥ 2.5V
2) Vsg ≤ 2.5V
3) Vsp = 0V
4) Vsg = 0V
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• I/O board (IOB) defective
• High voltage supply board defective
• ID sensor dirty
• Defect at ID sensor pattern writing
area of the drum
ID sensor Vsg test error351 C
When the ID sensor was checked, the
ID sensor output voltage was 5.0V
while the PWM signal input to the ID
sensor was 0.
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connection
• I/O board (IOB) defective
• Scanning system defective
• High voltage supply board defective
• ID sensor dirty
• Defect at the ID sensor pattern
writing area of the drum
ID sensor, pattern edge detect error352 C
The ID sensor pattern edge voltage is
detected to be not 2.5V twice
consecutively during an 800 ms
interval.
• 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
ID sensor, LED current abnormal at
initialization
353 C
• 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.
• ID sensor defective
• ID sensor harness defective
• ID sensor connector defective
• Poor ID sensor connection
• I/O board (IOB) defective
• Exposure system defective
• High voltage supply board defective
• Dirty ID sensor
ID sensor timeout abnormal at
adjustment
354 C
Vsg falls out of the adjustment target
(4.0 ± 0.2V) at the start of Vsg checking
after 20 seconds
• ID sensor defective
• ID sensor harness defective
• ID sensor connector defective
• I/O board (IOB) defective
• Exposure system defective
• Poor ID sensor connector connection
• High voltage supply board defective
• Dirty ID sensor
TD sensor error: Test value abnormal390 C
The TD sensor output voltage is less
than 0.5V or more than 5.0V after 10
consecutive times during copying.
• TD sensor defective
• TD sensor not connected or
connector damaged
• Poor connection between the TD
sensor and the I/O board (IOB)
• I/O board (IOB) defective
• Toner supply defective
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