Gestetner B003 Service Manual page 190

SERVICE CALL CONDITIONS
Code No.
350 C ID sensor pattern test error
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
351 C ID sensor Vsg test error
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.
352 C ID sensor, pattern edge detect error
The ID sensor pattern edge voltage is
detected to be not 2.5V twice
consecutively during an 800 ms
interval.
353 C ID sensor, LED current abnormal at
initialization
One of the following ID sensor
output voltages is detected at ID
sensor initialization.
1) Vsg < 4.0V when the maximum
2) Vsg ≥ 4.0V when the minimum
354 C ID sensor timeout abnormal at
adjustment
Vsg falls out of the adjustment target
(4.0 ± 0.2V) at the start of Vsg checking
after 20 seconds
390 C TD sensor error: Test value abnormal
The TD sensor output voltage is less
than 0.5V or more than 5.0V after 10
consecutive times during copying.
B003/B004/B006/B007
Symptom
PWM input (255) is applied to
the ID sensor.
PWM input (0) is applied to the
ID sensor.
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 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 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 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 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 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
4-4
Possible Cause
SM