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

Page: 354 / 448

MX3500N MANUAL PAPER FEED SECTION D – 2
2. Operational descriptions
The paper pickup roller moves up and down to press paper and
separates the top paper, which is fed to the paper feed roller.
The paper feed roller feeds paper to the paper transport section,
and the separation roller prevents double feed.. ON/OFF control of
the pickup roller and the paper feed roller is made by the manual
paper feed clutch. Paper is transported to the resist roller by the
manual paper transport roller.
3. Disassembly and assembly
A. Manual paper feed section
Signal name Name Function/Operation
CPFM Paper feed motor Paper feed section drive
MPED Manual feed paper empty detection Manual paper feed tray paper empty detection
MPFD Manual feed paper entry detection Manual paper feed tray paper empty detection
MPDS Paper pickup solenoid Paper pickup solenoid (Manual paper feed)
MPGS Manual paper feed gate solenoid Controls the manual paper feed gate solenoid Open/Close.
MPLD Manual feed paper length detector Manual paper feed tray paper length detection
MPUC Manual paper feed clutch Controls the manual paper feed section paper feed roller ON/OFF.
MPWD Manual paper feed tray paper width detector Manual paper feed tray paper width detection
MTOP1 Manual paper feed tray pull-out position detector 1 Manual paper feed tray paper pull-out position detection (storage position)
MTOP2 Manual paper feed tray pull-out position detector 2 Manual paper feed tray paper pull-out position detection (pulling-out position)
PFM Transport motor Transport drive between the resist roller and the paper feed section. Transport drive
between the resist roller and the right door section.
TH_M/HUD_M Temperature/humidity detection Detects temperature/humidity.
No. Name Function/Operation
1 Paper feed roller (Manual paper feed tray) Feeds paper to the paper transport section.
2 Separation roller (Manual paper feed tray) Separates paper to prevent Double Feed.
3 Paper pickup roller (Manual paper feed tray) Feeds paper to the paper feed roller.
4 Torque limiter A certain level of resistance force is supplied to the rotation of the separation roller to
prevent double feed.
5 Transport roller 12 (Drive) Transports paper transported from the transport roller 11 to the transport roller 8.
Transports paper fed from the manual feed tray to the transport roller 8.
Unit Parts Maintenance
(1) Manual
paper feed
tray unit a Temperature/humidity sensors
b Manual paper feed tray pull-out
position detector 1
c Manual paper feed tray pull-out
position detector 2
d Manual paper feed tray paper
width detector
e Manual feed paper length
detector
(2) Manual
paper feed
unit a Paper pickup roller {
b Paper feed roller {
c Separation roller {
d Manual paper feed gate
solenoid
e Transport roller 12 (Drive)
f Manual feed paper entry
detection
g Torque limiter
h Manual feed paper empty
detection
i Paper pickup solenoid
(1)
(2)-a
(1)-a
(2)-b
(1)-b
(1)-c
(2)-c
(1)-d
(2)-d
(1)-e
(2)-e
(2)-f
(2)-i
(2)
(2)-g
(2)-h