Paper Presser Mechanism - Brother DX-2000 Service Manual

(5) As soon as the printer requests for stop, the motor
stops and goes into a standby state.
• • Paper Feed Timing Chart
(when only one piece of A4 paper is reversed and printing speed is 12 ppm)
Solenoid
Reversible
motor
Reverse
sensor
Duplex
sensor
Duplex drive request from the printer
* The paper feed timing varys in the printing speed.
For 16 ppm, 12/16 times the above values.
For 20 ppm, 12/20 times the above values.
4. PAPER PRESSURE MECHANISM
Upon a request from the printer, the paper pressure unit built in the Duplex tray is moved
up or down by the paper pressure motor connected to the I/F PCB.
The paper pressure unit is moved up only when the first tray is selected on the printer to
supply paper, or down when paper is fed from another tray.
The cassette sensor detects the position of the paper pressure unit, and whether the
Duplex tray is loaded into the Duplex unit.
Paper pressure unit
4.84 sec*
0.1 sec
C.W
1.3 sec* 4.21 sec*
Figure 2.3
Paper pressure motor
Cassette sensor
Figure 2.4
II-3
C.C.W
3.2 sec*
I/F PCB