Canon imagePRESS C800 Series, Troubleshooting Manual

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Chapter 1
1-120
The completed assembly of the DC Controller PCB
Field Remedy
1) Before Replacing
Backup the DC Controller PCB SRAM.
Execute service mode (Level 2) > COPIER > FUNCTION > SYSTEM > DSRAMBUP. "ACTIVE" is displayed when executed and "OK!" is displayed in approx.
2 minutes. Turn OFF the main power when this is completed.
2) After Replacing
Restore the DC Controller PCB SRAM.
Execute service mode (Level 2) > COPIER > FUNCTION > SYSTEM > DSRAMRES. "ACTIVE" is displayed and "OK!" is displayed in approx. 2 minutes to
complete the restore.
[Caution]
When replacing the DC Controller PCB, be sure to use a new one. Do not use the DC Controller PCB which was used with another machine.
1.1.7.1.38 Points to note after replacing Primary Charging Wire
0031-6183
[ Manual-related ]
Description
Please explain the actions to take after replacing the Primary Charging Wire.
Field Remedy
1) Clear the parts counter.
Service Mode > Service Mode > COPIER > Counter > PRDC-1 > PRM-WIRE (Primary Charging Wire parts counter)
2) Execute the Charging Wire cleaning.
Service Mode > COPIER > Function > CLEANING > WIRE-EX (Cleaning of Charge Wire (5-reciprocation))
3) Execute the potential control.
Service Mode > COPIER > Function > DPC > DPC (Execution of potential control: 1/1 speed)
4) Output the pattern generator for adjustment of the wire height.
Service Mode > COPIER > Function > MISC-P > GRID-ADJ (Primary Charge Wire height adjusting PG output)
[Caution]
PG can be output only under the following conditions.
- Paper type: Plain paper 1/2
- Paper size: A3+ 329.0 mm x 483.0 mm (13" x 19")/A3/SRA3/Ledger 279.4 mm x 431.8 mm (11" x 17")*/A3+ 305.0 mm x 457.0 mm (12" x 18")
(* Ledger 279.4 mm x 431.8 mm (11" x 17") is supported with DCON Ver. 4.01 or later.)
- Paper source: Cassette 1
Under conditions other than those mentioned above, "NG" is displayed and a blank paper is output.
- This item must be executed after "READY" is displayed. While "WAIT" is displayed, This item is not executed even if OK key is pressed.
- When outputting PG using paper other than A3 extra-long paper which size is 329.0 mm x 483.0 mm (13" x 19"), soiled back of the paper due to secondary transfer
may occur. When soiled back of paper occurs, execute cleaning of roller from Settings/Registration menu.
5) In the case of density difference between the front and the rear on the test print image with the dark image on the front side of the test print, go to step 6) to make
adjustments. With the dark image on the rear side of the test print, go to step 7) to make adjustments. If there is no density unevenness, execute the work in step 8)
and later.
6) Adjust the Primary Charging Assembly (in the case of dark image at the front side on the test print).