Brother DX-2000 Service Manual page 37

Problem
Paper is not supplied in Misoperation
the Duplex unit.
Main PCB
Solenoid
Main PCB
Reversible motor
Switching guide
"JAM DUPLEX" error
message appears though
no paper is supplied in the
Main PCB
Duplex unit.
Reverse sensor
The paper supplied in the
Duplex unit stops halfway.
DU detection
(HL-1660/2060)
HL-1660/2060 unit
"JAM TRAY" error
Pickup roller
message appears.
(HL-1660/2060)
The first or second sheet of
Duplex tray
paper is not supplied to the
HL-1260 resist sensor.
Troubleshooting (2)
Cause
Is the Duplex unit set properly in the
printer?
Does the voltage vary from 24V to 0V at
pin 2 of main PCBÕ s connector P2?
Does the solenoid function?
Does the voltage vary from 24V to 0V at
pins 1, 2, 3 and 4 of main PCB's
connector P6?
Does the reversible motor run?
Does the switching guide move smoothly?
Refer to Figure 4.29 (IV-11).
Does the voltage vary from 5V to 0V at pin
3 of main PCB's connector P5 while the
switching guide is moving?
Does the actuator (Parts reference list,
11-20) move smoothly?
Supply paper in Simplex mode.
Is paper correctly supplied?
Check Result
No
No
No
No
No
No
No
Yes
No
No
Yes
Remedy
Set the Duplex unit properly according to the
manual.
Replace the main PCB.
Replace the solenoid.
Replace the main PCB.
Replace the reversible motor.
Reset the switching guide, or replace its parts.
Replace the reverse sensor or reverse sensor
harness.
Replace the main PCB.
Replace the HL-1660/2060 actuator.
Repair the HL-1260 unit.
(Pickup mistake with the first sheet of paper)
1 Set the Duplex tray correctly.
2 Set the HL-1660/2060 pickup roller correctly.
(Pickup mistake with the second sheet of paper)