Scanning System; Procedure After Replacing The Copyboard Glass; Procedure After Replacing The Reader Unit; Fixing System - Canon Color imageCLASS MF9170c Service Manual

12.1 Scanning System

12.1.1 Procedure after Replacing the Copyboard Glass

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After replacing the copyboard glass, enter the correction values (X, Y, Z) of
the standard white plate which are indicated on the back of the new copy-
board glass in the service mode.
Correction value (X):
Service mode> COPIER> ADJUST> CCD> W-PLT-X
Correction value (Y):
Service mode> COPIER> ADJUST> CCD> W-PLT-Y
Correction value (Z):
Service mode> COPIER> ADJUST> CCD> W-PLT-Z
Also, rewrite the values in the service book.
* 8 2 0 6 8 6 6 7 9 3 4 9 *
correction
value (X)
correction
value (Y)

12.1.2 Procedure after Replacing the Reader Unit

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After replacing the reader unit, execute automatic detection of the CCD read-
ing position at ADF stream reading in the following service mode.
COPIER> FUNCTION> INSTALL> STRD-POS
[Operation]
Adjust the reading position by moving the scanner in increments of 0.1
mm.
[Time]
When the lamp is turned on: Adjustment time; 10 seconds
When the lamp is not turned on: Lamp adjustment time; 10 to 30 seconds
+ Adjustment time; 10 seconds

12.2 Fixing System

12.2.1 Checking the Nip Width (fixing pressure roller)

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
When removing a paper, be sure to turn on the power supply and remove it
after checking that jam has occurred in the machine.
Take notice that removing a paper with no jam occurred in the machine may
cause a broken fixing film.
An incorrect nip width may cause the faulty fixing.
Check the nip width by following the procedure below if poor fixing image
defect occurs.
1) Make an all solid black print of A4 or Letter size using an toner cartridge
same as for this machine, and take the print to the customer's site.
2) Place the solid black print, with the printed side facing DOWN, in the cas-
sette of the printer.
3) Press the test print switch.
4) Open the upper cover as soon as the leading edge of the paper appears in
the delivery slot. Leave it for ten seconds.
5) Turn OFF the machine and take fixing unit from the machine. Then take
the paper out from the fixing unit.
6) Measure the width of the glossy band across the paper and check that it
meets the requirements as shown in Figure.
- Center (a): 8 +/- 1.0 mm
- Difference between right/left and center (a-b, a-c): 0 to 1 mm
- Difference between right and left (|b-c|): 1.5 mm or less
correction
value (Z)
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b
a
Center of A4 or Letter sized paper
Replace the fixing unit if the nip width is out of specification, since the nip
width of the fixing unit is not adjustable in this machine.

12.3 Electrical Components

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12.3.1 Procedure after Replacing the DC controller PCB

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After replacing the DC controller PCB, restore the backup data from the
main controller PCB.
1) Using the service mode, restore the backup data of the DC controller
stored in NVRAM of the main controller PCB to NVRAM of the DC con-
troller PCB.
COPIER> FUNCTION> VIFFNC> RSTR-DCN
2) Execute "Initial Setting/Registration > Adjustment/Cleaning > Automatic
Gradation Correction > Full Correction".

12.3.2 Procedure after Replacing the Main Controller PCB

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After replacing the main controller PCB with new one, perform the follow-
ing procedure.
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1. Backup the user data
Import the user data using the remote UI.
The machine does not support "Import/export via USB" (provided in the
following service SW) because it supports network as standard function.
# COPIER->FUNCTION->PARAM->SYS-SW->Bit Switch->SW 02 Bit6
2. Enter the flicker adjustment value of the control panel
1) Using the service mode, check the flicker value of the control panel.
TESTMODE> PANEL> FLICKER CHECK START> FLICKER AD-
JUST
MEMO:
The flicker adjustment value can be also checked in the spec list (FLICKER
ADJ PRM).
How to output the spec list: COPIER> FUNCTION> MISC-P> OUTPUT>
SPEC
2) Replace the main controller PCB.
3) Using the service mode, enter the adjustment value checked in Step 1).
TESTMODE> PANEL> FLICKER CHECK START> FLICKER AD-
JUST
4) Using the user mode, execute automatic gradation correction (full correc-
tion).
Initial Setting/Registration> Adjustment/Cleaning> Automatic Gradation
Correction> Full Correction

12.3.3 Procedure after Clearing RAM Data

imageCLASS MF9170c / imageCLASS MF9150c / imageCLASS MF8450c
After clearing the RAM data (ALL CLEAR) in the main controller PCB, per-
form the following procedure.
Chapter 12
Feed direction
c
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