SERVICE CALL CONDITIONS April 2007

4-42

SC codes Group 4: Image Development - 2
ID sensor error 1: Calibration SC400 D
Before adjustment Vsg_reg<0.5 but
Vsg_reg could not be adjusted to the
target Vsg_reg = 4.0±0.2V during
process control.
• ID sensor harness disconnected,
loose, defective
• ID sensor dirty
• ID sensor defective
• ITB unit drawer connector dirty
Note: Vsg_reg is the voltage reading of the light reflected directly from the bare
surface of the ITB. The color ID sensor is provided with one additional r eceptor
to read diffuse light reflected from the colors of ID sensor patterns. T he
additional receptor on the color sensor is not used to read the bare surf ace of
the belt. For more, see Section "6. Details".
SC410 D
ID sensor error 2: Development γ K
SC411 D
ID sensor error 3: Development γ M
SC412 D
ID sensor error 4: Development γ C
SC413 D
ID sensor error 5: Development γ Y
Development gamma for black,
magenta, cyan, or yellow is not
within range (0.3 to 6.0).
Process control halts when this
SC is issued.
• Toner density not normal: Refer to the
procedure for process control self-check
error codes 55 to 59 to 59, and 61
(section 4.2.4)
• Potential sensor defective
• Laser diode not firing
• ITB separation for CMY abnormal
• Transfer power pack defective
• ID sensor defective
SC414 D
ID sensor error 6: Development start voltage K
SC415 D
ID sensor error 7: Development start voltage M
SC416 D
ID sensor error 8: Development start voltage C
SC417 D
ID sensor error 9: Development start voltage Y
The development start voltage
in the development of the
black, magenta, cyan, or
yellow PCU is not within the
correct range (±150V)
• Toner density not normal: Refer to the
procedure for process control self-check
error codes 55 to 59, and 61 (section
4.2.4)
• Potential sensor defective
• LD not firing correctly
• ITB separation for CMY abnormal
• Transfer power pack defective
• ID sensor defective
LED error during Vsg adjustment SC418 C
PWM value: Ifsg>2000
This means the current to the LED of the
ID sensor is abnormal.
• ID sensor dirty
• ID sensor defective