Brother DPC-8060 Service Manual page 350

[ 3 ] Troubleshooting image defect
Several types of the image defects can be cleared by end users. For those defects, instruct the user
to check the 'User Check' items described in each table. Even if the same image defect appears, the
following procedures should be followed in the event of specific image defects.
See also [4] "Location of ground contacts" in this Chapter
grounding contacts.
CAUTION
When using the machine for a special job, such as printing of name cards, print quality cannot be
guaranteed.
(I-1) Light
Possible cause
Toner sensor
failure
(machine side)
Toner sensor
failure
(toner
cartridge side)
Drum
connection
failure
HVPS / Main
PCB failure
Dirt on the
scanner
window
Laser unit
failure
User Check
(1) Check the machine's environment. Conditions such as humidity, high
temperatures, etc. may cause this situation to occur.
(2) If the whole page is light, toner save mode may be on. Disable toner save
mode within Printer Properties tab of the driver.
(3) Try installing a new toner cartridge or drum unit.
Check
Step
1 Can printing be started
with the drum unit and
toner cartridge removed?
2 Is the problem solved when
4 or 5 pages are printed
after the toner cartridge is
replaced with a full one?
3 Are all the contacts
between the drum unit and
machine body connected
correctly?
4 Is the harness connection
between the HVPS and the
main PCB correct?
5 Is there any dirt on the
scanner window?
6 Is the problem solved after
replacing the laser unit?
for information about the location of the
Result
Yes Check if the toner
sensor is dirty and check
the toner sensor
connection.
Yes The wiper of the toner
cartridge is defective.
Replace the toner
cartridge.
No Clean contact electrodes
both on the drum unit
and in the machine
body.
Yes Replace the HVPS or
the main PCB.
Yes Wipe it off with a soft
clean paper.
Yes Replace the laser unit.
9-28
Ground
Remedy
contacts
(1), (4)
(5), (6)
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