White Print (Refer To Figure 6-2C.); White Print Over Entire Page - Toshiba e-STUDIO477S Service Manual

6.5.5.(3) White print (Refer to Figure 6-2C.)

(3-1) White print over entire page

Check item
(3-1-1) Toner condition
Remaining amount Confirm that sufficient amount of toner remains
of toner inside the toner cartridge.
(3-1-2) Exposure condition to light
LED head Confirm that the LED head is positioned in the
normal position where the LED head opposes
again the drum when the cover is closed. Check
that no obstacle exists in front of the LED head,
that hampers light emission from the illuminating
surface of the LED head.
Connecting condition Check that the LED head is normally connected.
of the LED head
Drum shaft Check that the drum shaft keeps contacting with
the right and left side plates normally.
F8,F9 fuse on the Measure resistance of F8,F9.
PU board
1 ohm or less: Normal
Higher than 1 ohm: NG
45387101TH Rev.1
Action to be taken
Check work
at NG
Replace the
toner cartridge.
Correct the
installation
condition of the
LED head.
Replace the
LED head.
Replace the ID
unit.
If any attempt
of using new ID
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
Replace the PU
board
Check item
(3-1-3) High voltage terminal
ID unit terminal Check that the high voltage terminal of the ID
unit is contacting with the Contact Assembly
normally by visual inspection. (Refer to Figure
6-3.)
6. Troubleshooting and repair procedure
Action to be taken
Check work
at NG
Replace the ID
unit or correct
the high voltage
terminal.
If any attempt
of using new ID
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
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