Brother 1660e - B/W Laser Printer, Руководство по обслуживанию

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VI
- 9
Possible cause Step Check Result Remedy
Paper failure 1 Is recommended paper used? No Use recommended paper.
Paper soaked 2 Is paper soaked? Yes Store the paper in packing
paper to keep it from soaking.
Dropout I-11
EP-ED cartridge 3 Does printed image improve when the EP-ED
cartridge is replaced? Yes Replace the EP-ED cartridge.
Transfer roller
failure 4 Is there any dirt on the transfer roller or is it
deformed? Yes Clean or replace the transfer
roller assy.
Transfer input
signal error 5 Do the pins 7 and 8 of the connector
P6 on the main PCB have the following value
respectively when a sheet of paper is fed from
the MP tray?
P6-7 pin (HVT2) --- Change in voltage from
15V approx. to 0V about 1 second after a
sheet of paper is fed.
P6-8 pin (HVT3) --- Change in voltage from
9V approx. to 0V when the voltage at the
pin 7 changes from 0V to 15V. No Replace the main PCB assy
or the harness.
Dirt on power
supply terminal 6 No Clean the contact to assure
the continuity.
Failure in the
transfer high-
voltage circuit
Clean the transfer roller right end bearing, the
check continuity between the transfer roller
power supply spring and the terminal of the
high-voltage transfer unit. Is there continuity?
Replace the high-voltage
power supply PCB assy.
Yes
Possible cause Step Check Result Remedy
Toner bias 1 Do white vertical stripes appear like a band? Yes
Rock the cartridge, set it
again in the printer and
check again the print quality.
Drum damage 2 Does print quality improve when the EP-ED
cartridge is replaced? Yes Replace the EP-ED cartridge.
White vertical streaks I-12
Transfer roller
failure 3 Is the transfer roller damaged or deformed? Yes Replace the transfer roller
assy.
Dirt on the
reflecting
mirror 4 Is the problem solved when the scanner unit
is replaced? Yes Clean the reflecting mirror
with a cleaning tip or replace
the scanner unit.