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June 2005 © TOSHIBA TEC e-STUDIO281c/351c/451c TROUBLESHOOTING
5 - 95
5
5.2 Troubleshooting for the Image
1) Color deviation
<Symptoms>
Original mode Location Phenomena
All modes Color blurred in outline of white text or
illustration on a colored background
Color
deviationÆ
Fig.5-1
Text Mode
Text/Photo Mode
Outline in black text on a colored
background
White voidÆ
Photo Mode
Map Mode
Color blurred in outline of line or text Color
deviationÆ
Cause/Section Step Check Item Measure Remark
1 Test printing (A3/LD) Output the built-in grid pattern For the fol-
lowing
checks
Drum rotation
abnormality
2 Check the main motor operation in
the test mode (03) to see if there is
any rotation abnormality of the drum.
Replace the main motor.
3 Check the main motor operation in
the test mode (03) to see if there is
any rotation abnormality of the drum.
Reconnect the connectors.
Replace the harnesses.
Replace the LGC board.
Inadequate
main motor
rotation speed
4 Check the value set for main motor
rotation speed. (Is the value signifi-
cantly different from the default
value?)
Reset main motor speed to 128.
Drum coupling
and coupling
on the equip-
ment side
5 Loose coupling, damage, deforma-
tion
Check if they are installed prop-
erly or replace the couplings.
Transfer belt 6 Deformation or damage of the trans-
fer belt or stains on the transfer belt.
Clean or replace the transfer belt.
7 Is there any abnormality of the trans-
fer belt home position sensor?
Clean or replace the sensor.
8 The reflection tape is stained or dam-
aged.
Clean or replace the transfer belt.
9 Are the couplings on the transfer belt
side loosen, damaged or deformed?
Tighten the screws if they loosen,
or replace the couplings.
10 Stain or damage of the drive roller Clean or replace the drive roller.
11 Does the rib of the transfer belt over-
lap the collar on both edge of the
drive roller?
Adjust the position of the transfer
belt.
12 Is the belt edge damaged or stained? Clean or replace the transfer belt.
13 Peeling of the cleaning blade
(Large driving load)
Replace the cleaning blade.
14 Is the transfer belt unit installed nor-
mally?
(Is the unit properly grounded?)
Check and correct the installing.