Table of Contents
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Section
Step
10
Select "Adjust" and "Printer," change the
value for "Image Density" to a greater one (on
Engine
the + end), and make a copy. Is the image
density higher on the copy than before?
1
Select "Tech. Rep. Mode," "I.R. & EDH
Check," and "Function (I.R.)" and run "Scan-
IR
ning Check." Does the malfunction code
appear at this time?
1155SBT050304A
4) Foggy Background
Section
Step
1
Is sunlight or any other extraneous light
entering the copier?
1
Is the Cleaning Blade dirty with foreign matter
or paper dust?
2
Is the PC Drum dirty with foreign matter?
3
Is the Sleeve Roller seriously contaminated?
4
Is the developing bias contact normal?
Engine
5
Is the Main Erase Lamp dirty?
6
Select "Tech. Rep. Mode," "Tech. Rep.
Choice," and "Printer," change the value for
"VG Adjust" to a smaller one (on the - end),
and make a copy. Does foggy background
occur on the copy?
IR
1
Are the mirrors and lens dirty?
1155SBT050305A
5) Black Streaks or Bands
Section
Step
1
Is the PC Drum surface scratched or dirty?
2
Is the PC Drum properly grounded?
3
Does the Cleaning Blade make a correct lat-
eral motion?
Engine
4
Is the Cleaning Blade warped or deterio-
rated?
5
Is toner uniformly attracted onto the Sleeve
Roller?
6
Is the PC Drum Charge Corona wire cleaner
at the home position?
Check Item
Result
Check Item
Result
Check Item
Result
T-82
Action
YES
This completes the proce-
dure.
NO
Change HV1 or HV2.
YES
Follow the corresponding
troubleshooting procedure.
Action
YES
Protect the copier from
extraneous light.
YES
Clean or change the
Cleaning Blade.
YES
Clean or change the PC
Drum.
YES
Clean the Sleeve Roller.
NO
Clean or change the devel-
oping bias contact.
YES
Clean the Main Erase
Lamp.
NO
This completes the proce-
dure.
YES
Clean the mirrors and lens.
Action
YES
Clean or change the PC
Drum.
NO
Clean or change the PC
Drum ground plate.
NO
Check the Cleaning Blade
lateral movement mecha-
nism.
YES
Change the Cleaning
Blade.
YES
Change the Developing
Unit.
NO
Check the corona wire
cleaning mechanism.
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Table of Contents
Troubleshooting
