B140 SERIES AND G126 SERVICE MODE
SM 4-45 B064 Series/B140 Series/G126
Trouble-
shooting
SC No. Symptom Possible Cause
ID sensor error 2 351 C
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.
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• IOB defective
• ID sensor pattern not written correctly
• Incorrect image density
• Charge power pack defective
• ID sensor dirty
C ID sensor error 3 352
For 2 s during the ID sensor pattern
check, the ID sensor pattern edge
voltage is not 2.5V or the pattern
edge is not detected within 800 ms.
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• IOB defective
• ID sensor pattern not written correctly
• Incorrect image density
• Charge power pack defective
• ID sensor dirty
ID sensor error 4 353 C
One of the following ID sensor
output voltages is detected at ID
sensor initialization.
• Vsg < 4.0V when the maximum
PWM input (255) is applied to the
ID sensor.
• Vsg ≥ 4.0V when the minimum
PWM input (0) is applied to the
ID sensor.
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• IOB defective
• ID sensor pattern not written correctly
• Incorrect image density
• Charge power pack defective
• ID sensor dirty
ID sensor error 5 354 C
Vsg falls out of the adjustment
target (4.0 ± 0.2V) during Vsg
checking.
• ID sensor defective
• ID sensor harness disconnected
• ID sensor connector defective
• IOB defective
• ID sensor pattern not written correctly
• Incorrect image density
• Charge power pack defective
• ID sensor dirty
ID sensor error 6 355 C
The Vp value, which measures the
reflectivity of the ID sensor pattern,
was not in the range of –70V to –
400V.
• Potential sensor defective
• Potential sensor harness defective
• Potential sensor disconnected
• IOB defective
• OPC unit connector defective
• Charge corona power pack defective
• Charge corona wire dirty, broken
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