Sharp MX 3501N - Color Laser - Copier, Service Manual

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MX3500N DUPLEX SECTION G – 2
2. Operational descriptions
A. Duplex section
• Paper is transported from the fusing section and sent to the
transport roller 13 driven by the ADU motor upper and to the
paper exit roller 1.
At that time, paper passes under the gate guide.
• After the specified time from detection of paper lead edge by
POD1, the paper exit drive motor is rotated forward, and after the
specified time, it is rotated reversely.
• At that time, paper passes the right side of the ADU gate guide
by its own weight.
• The transport rollers 10 and 11 are driven by the ADU motor
lower, and paper is transported to the duplex paper feed position.
• Paper is stopped at the duplex paper feed position, and trans-
ported to the inside of the machine again.
3. Disassembly and assembly
A. Duplex section
Signal name Name Function/Operation
ADULM ADU motor lower Drives the right door section.
APPD1 ADU transport path detection 1 Detects paper pass in the upstream of the duplex (ADU).
APPD2 ADU transport path detection 2 Detects paper pass in the midstream of the duplex (ADU).
DSW_ADU ADU transport open/close detection Duplex (ADU) cover open/close detection
POD3 Right tray paper exit detection Detects the paper exit into the right tray.
TFD3 Detects the right tray paper exit full. Detects the right tray paper exit full.
ADUGS ADU gate solenoid Controls the ADU gate.
ADUHM ADU motor upper Drive the transport roller 13.
No. Name Function/Operation
1 Transport roller 10 (Drive) Transports the paper transported from the transport roller 13 to the transport roller 11.
2 Transport roller 11 (Drive) Transports the paper transported from the transport roller 10 to the transport roller 12.
3 Paper exit roller 2 (Drive) Used to discharge paper.
4 ADU gate Selects the paper path to transport paper to the duplex (ADU) section or to discharge paper to
the right tray.
5 Transport roller 13 (Drive) Transports paper from the paper exit roller 1 to the paper exit roller 2. Transports paper to the
duplex (ADU) section.
Unit Parts Maintenance
(1) Right door
unit a RD I/F PWB
b Manual paper feed clutch
c Discharge brush
d Detects the right tray paper exit
full.
e Right tray paper exit detection
f ADU transport open/close
detection
g ADU transport path detection 1
h Paper exit roller 2 (Drive) {
i Transport roller 10 (Drive) {
j Transport roller 11 (Drive) {
k ADU transport path detection 2
l Transport roller 13 (Drive) {
m ADU gate
n ADU gate solenoid
(2) Others a ADU motor lower
(1)
(1)-j
(1)-k
(1)-i
(1)-m
(1)-h
(1)-l
(1)-c
(1)-d
(1)-e
(1)-a
(1)-n
(1)-b
(2)-a
(2)-b
(1)-g
(1)-f