Brother 1660e - B/W Laser Printer, Service Manual

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VI
- 14
Possible cause Step Check Result Remedy
EP-ED cartridge 1 Take the EP-ED cartridge out of the printer
and rock it to distribute the toner evenly.
When the cartridge is returned to the printer,
does the LCD show "00 READY"?
Yes The problem was caused by
toner onesided due to too
little toner remaining.
Prepare to replace the new
cartridge.
High-voltage
electrode 2 Are the developing bias or the toner sensor
electrode of the high-voltage power supply PCB
assy dirty? Yes Clean the electrode.
High-voltage
power supply
PCB 3 Is the voltage of P4-13 in high-voltage power
supply PCB connector higher than that of P4-11,
when the EP-ED cartridge which is full with toner
is installed? Yes Replace the high-voltage
power supply PCB assy.
HV harness 4 Is the voltage of P6-13 in the main PCB
connector higher than that of P6-11? Yes Replace the HV harness.
Replace the main PCB assy. No
Main PCB
M-9 "16 TONER EMPTY " is displayed
Possible cause Step Check Result Remedy
Actuator 1 Does the actuator of the paper delivery sensor
or the registration sensor operate smoothly? No Reassemble or replace the
paper delivery actuator and
regist sensor actuator.
Fuser harness
Feed flat cable 3 Does the voltage of P11-1 in the main PCB
connector rise from 0V to 5V when the eject
sensor is covered, or the voltage of P3-5 in
the main PCB connector rise from 0V to 5V? No Replace the fuser harness
or the feed flat cable.
Replace the main PCB assy. Yes
2 Does the voltage of P2-1 in the fixing PCB
connector rise from 0V to 5V when the eject
sensor is covered, or the voltage of P5-5 in
the paper feeder PCB connector rise from
0V to 5V when the registration sensor is
covered? No Replace the fixing PCB assy
or the paper feed/size-sw PCB
assy. Paper delivery
sensor
Regist sensor
"13 JAM XXXXXX" is not displayed even if a paper jam has occured
(or is displayed even if a paper jam has not occurred) XXXXXX is TRAYS/INSIDE/REAR/DUPLEX. M-10