Shading For Service - Oce 3121 Technical & Service Manual

6 Shading for service

There are two types of automatic correction of shading: for service and for
R&D. ( ' * 4 * ', 3rd screen and 12th screen).
For the automatic correction of shading, various data is monitored and stored
in RAM on the image processor PBA. The stored data is used as a target value
for the correction of shading carried out prior to the copying cycle.
Auto shading for service
This mode should be used in the following situations:
When replacing the image processor PBA
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After executing ( ' * 4 * ' ), ' RAM INIT '.
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Before executing ( ' * 4 * ' ), ' COPY AUTO DENSITY CORRECTION '.
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After replacing the power supply PBA
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After replacing the laser unit.
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After replacing the CCD unit.
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After replacing the analogue processor PBA.
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Open the front door, and insert the brush in the fuser release.
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Separation static eliminator cleaning brush
Separ at i on st at i c el i m i nat or cl eani ng br ush
Insert the switch actuator in the door switch.
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Using a thin pin, press the service switch.
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A ' $ ' will be displayed in the upper corner of the screen.
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22 TSM Océ 3121
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Image quality