Process Control Troubleshooting; Summary Of Process Control Sc Codes - Toshiba e-STUDIO4500c Service Manual

SPECIAL PROCEDURES

4.2.4 PROCESS CONTROL TROUBLESHOOTING

Summary of Process Control SC Codes

This is a list of SC codes that may occur during process control. For more, please
refer to the process control tables on the following pages.
Pre-Processing Check
SC316 to SC319
SC400
SC418
SC436 to SC439
Potential Control
SC410 to SC413
SC414 to SC417
SC420 to SC423
SC424 to SC427
SC432 to SC435
TD Sensor Output Calibration
SC360 to SC367
Process Control Gamma Correction
SC410 to SC413
SC414 to SC417
Vpp is not within the normal range (Vpp: the AC current applied to the
charge roller to compensate for changes in the ambient temperature and
humidity). Insufficient charge causes white spotting and too much charge
causes toner to film on the surface of the drum. Vpp must be > 2.8 kV.
ID sensor could not be calibrated. An abnormal ID sensor condition is
detected when before calibration begins, Vsg < 0.5V or after calibration, Vsg
cannot be adjusted to 4.0 0.2V.
Correct current could not be supplied to the ID sensor.
A problem is detected with a potential sensor during calibration.
The development gamma is out of range (not between 0.3 and 6.0) for a
color.
Vk is out of range (not within 150V) for a color. If the development potential
is less than Vk, toner is not applied to the drum.
Vd cannot be adjusted to the target voltage for a drum.
The potential sensor detects that Vpl is not 10V of the target Vpl after
exposure of the ID sensor patterns.
The residual voltage on a drum is greater than -200V.
An abnormal condition is detected when output of one of the TD sensors
fails to fall within the range of 0.5V to 4.5V.
The development gamma for black, magenta, cyan, or yellow is not within
range (0.3 to 6.0).
The development start voltage (Vk) for black, magenta, cyan, or yellow PCU
is not within range ( 150V)
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April, 2007