Image Formation System; Primary Charging Wire; Primary Charging Assembly - Canon imageRUNNER ADVANCE 6075 Series Service Manual

5
Adjustment > When replacing parts > Image Formation System > Primary Charging Assembly
■ TPM PCB
<Procedure of parts replacement>
see "Removing Main Controller PCB 1," on p. 4-81.
<Procedure of adjustment>
When TPM setting is "OFF"
Any operation is not necessary at replacement.
When TPM setting is "ON"
It is necessary to restore the TPM key which was backed up after changing the setting to "ON".
1) Removing the network cable
Until the TPM key is restored, information might be leaked due to the inappropriate access
via network, so be sure to perform this operation appropriately.
2) Connecting the USB Memory after turning ON the main power switch
3) Restoring the TPM key
Management Settings > Data Management >TPM Settings> Restore of TPM Key
4) Turning OFF and ON the main power switch
5 Adjustment > When replacing parts > Image Formation System > Primary Charging Assembly

Image Formation System

■ Primary Charging Wire

<Procedure of parts replacement>
see "Replacing the Primary Charging Wire," on p. 4-104.
<Procedure of adjustment>
1) Clear the parts counter. (COPIER>COUNTER>PRDC-1>PRM-WIRE)
2) Clean the Charging Wire. (COPIER>FUNCTION>CLEANING>WIRE-CLN)
3) Init of Primary Charging Wire current VL(COPIER>ADJUST>HV-PRI>PRI-GRID)
4) Execute the potential control (COPIER>FUNCTION>DPC>DPC). Turn OFF and then ON
the main power. (The potential control is executed at startup.)
5) Execute the potential control. (COPIER>FUNCTION>DPC>DPC)

■ Primary Charging Assembly

<Procedure of parts replacement>
see "Removing the Primary Charging Assembly," on p. 4-97.
<Procedure of adjustment>
1) Output a halftone image using the service mode.
• TEST > PG > TYPE : 5
2) Execute the following procedure according to the density difference on the front and rear
sides of the test print image.
• When the front side test print image is dark, execute step 3.
• When the rear side test print image is dark, execute step 4.
• When there is no uneven density, execute step 5 and the following.
When the front side test print image is dark
NOTE:
• When the front side test print image is dark [1], execute step 3 until the density
becomes even. When the density becomes even, execute step 5 and the following.
• When the adjustment screw is turned clockwise, the Charging Wire goes down and
up (gap between grid and Charging Wire becomes narrow and wide). As a result, the
density of output image becomes light.
CAUTION:
Be sure to adjust the dark side (density of the test print image) to be the light side.
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