Sharp MX-5500N / MX-6200N / MX-7000N (serv.man58) Service Manual ▷ View online
MX-7000N TRAY PAPER FEED SECTION F – 5
2. Operational descriptions
A. Tandem paper feed
(1) Paper size of each paper feed tray
The paper feed tray 1 is used exclusively for A4, 11 x 8.5, or B5
paper size.
The paper feed tray 2 is used for A4 (11 x 8.5) paper size.
paper size.
The paper feed tray 2 is used for A4 (11 x 8.5) paper size.
(2) Paper feed operation
1)
When copy/print operation is started, the motors (CPFM) and
the clutch (T1PFC) are turned on to turn on the solenoid
(T1PUS) at the timing of paper pickup. This rotates and falls
the take-up roller to pick up paper.
the clutch (T1PFC) are turned on to turn on the solenoid
(T1PUS) at the timing of paper pickup. This rotates and falls
the take-up roller to pick up paper.
2)
At the same time, the paper feed roller rotates to feed paper to
the transport section. At that time, the separation roller rotates
to prevent against double feed of paper.
the transport section. At that time, the separation roller rotates
to prevent against double feed of paper.
B. Tray paper feed
(1) Preliminary operation before paper feed
• When the paper is set and the paper feed tray is inserted, the
pickup roller moves down and the paper feed tray sensor turns
ON.
ON.
• The lift-up motor operates to lift the rotating plate.
• The paper upper limit sensor turns on to stop the rotating plate at
• The paper upper limit sensor turns on to stop the rotating plate at
the specified position.
(2) Paper feed operation
• When copy/print operation is started, the motor and the clutch
are turned ON and the pickup roller is rotated in the paper pickup
timing to feed paper.
timing to feed paper.
• At the same time, the paper feed roller rotates to feed paper to
the transport section. At that time, the separation roller rotates to
prevent against double feed of paper.
prevent against double feed of paper.
(3) Remaining paper detection
• Remaining paper detection is performed according to four
stages, i.e. three stages with paper and one stage with no paper,
and the result is displayed.
and the result is displayed.
(4) Remaining paper detection method
• The number of remaining sheets is determined according to the
number of times the remaining paper sensor changes from the
time the paper feed tray starts lifting up to the time when the
upper detection sensor comes ON.
time the paper feed tray starts lifting up to the time when the
upper detection sensor comes ON.
Detects remaining paper
by the paper empty sensor
by the paper empty sensor
1/3 Field
Sensor logic: Low
Sensor logic: Low
2/3 Field
Sensor logic: Hi
Sensor logic: Hi
3/3 Field
Sensor logic: Low
Sensor logic: Low
Not detects the paper
Remaining paper 1/3 position
Remaining paper 2/3 position
Remaining paper 3/3 position
Turn plate
CPED
(empty sensor)
(empty sensor)
Remaining paper
detection actuator
detection actuator
CSPD
(remaining paper detection)
(remaining paper detection)
(Figure showing state transition of the remaining paper detection sensor during tray elevation and changes
in status according to the number of remaining sheets)
MX-7000N TRAY PAPER FEED SECTION F – 6
3. Disassembly and assembly
A. Tandem paper feed tray unit
(1) Tandem paper feed tray unit
1)
Remove the right lower door and right lower door cover. (Refer
to the “[A] EXTERNAL OUTFIT“).
to the “[A] EXTERNAL OUTFIT“).
2)
Remove the screws (A), and remove the stopper (B). Remove
the screws (C), and remove the tandem paper feed tray unit
(D).
the screws (C), and remove the tandem paper feed tray unit
(D).
a. Paper pickup roller (Tandem No. 1 / No. 2 paper feed tray),
Paper feed roller (Tandem No. 1 / No. 2 paper feed tray)
1)
Pull out the tandem paper feed tray unit (A).
Unit
Page
A
Tandem paper feed tray unit
F - 6
B
Tray paper feed unit
F -11
C
Others
F -18
Unit
Parts
Mainte
nance
Page
1
Tandem
paper feed
tray unit
paper feed
tray unit
a
Paper pickup roller
(Tandem No. 1 / No. 2
paper feed tray)
(Tandem No. 1 / No. 2
paper feed tray)
✕
{
F - 6
b
Paper feed roller (Tandem
No. 1 / No. 2 paper feed
tray)
No. 1 / No. 2 paper feed
tray)
✕
{
c
Separation roller (Tandem
No. 1 / No. 2 paper feed
tray)
No. 1 / No. 2 paper feed
tray)
✕
{
F - 7
d
Torque limiter
✕
F - 8
e
Lift wire (Rear)
–
F - 8
f
Lift wire (Front)
–
F -10
Unit
1
Tandem paper feed tray unit
1-a
1-b
1-c
1-c
1-d
1-a
1-d
1-f
1-e
1
1-b
1
Unit
Parts
Mainte
nance
1
Tandem paper feed
tray unit
tray unit
a
Paper pickup roller (Tandem
No. 1 / No. 2 paper feed tray)
No. 1 / No. 2 paper feed tray)
✕
{
b
Paper feed roller (Tandem
No. 1 / No. 2 paper feed tray)
No. 1 / No. 2 paper feed tray)
✕
{
1
C
D
C
B
A
1-a
1-b
1-b
1-a
A
MX-7000N TRAY PAPER FEED SECTION F – 7
2)
Disengage the pawls (B), and remove the paper guide (C).
3)
Raise the tandem paper feed PG unit (D). Disengage the pawl
(E), and remove the paper pickup roller (Tandem No. 1 / No. 2
paper feed tray) (F), the paper feed roller (Tandem No. 1 / No.
2 paper feed tray) (G).
(E), and remove the paper pickup roller (Tandem No. 1 / No. 2
paper feed tray) (F), the paper feed roller (Tandem No. 1 / No.
2 paper feed tray) (G).
b. Separation roller (Tandem No. 1 / No. 2 paper feed tray)
1)
Pull out the tandem paper feed tray unit (A).
2)
Remove the screw (B), and remove the paper guide (C).
3)
Disengage the pawl (D), and remove the separation roller (E).
Unit
Parts
Mainte
nance
1
Tandem paper feed
tray unit
tray unit
c
Separation roller (Tandem
No. 1 / No. 2 paper feed tray)
No. 1 / No. 2 paper feed tray)
✕
{
C
B
F
G
E
1-a
1-b
D
1-c
1-c
A
C
B
1-c
E
D
MX-7000N TRAY PAPER FEED SECTION F – 8
c. Torque limiter
1)
Pull out the tandem paper feed tray unit (A).
2)
Remove the screw (B), and remove the paper guide (C).
3)
Remove the screws (D), and remove the separation roller unit
(E).
(E).
4)
Remove the torque limiter (F).
d. Lift wire (Rear)
1)
Remove the right lower door and the right lower door cover.
(Refer to the “[A] EXTERNAL OUTFIT”.)
(Refer to the “[A] EXTERNAL OUTFIT”.)
2)
Remove the tandem paper feed tray unit. (Refer to the "(1)
Tandem paper feed tray unit".)
Tandem paper feed tray unit".)
3)
Remove the screws (A), and remove the cassette positioning
plate (B).
plate (B).
Unit
Parts
Mainte
nance
1
Tandem paper feed
tray unit
tray unit
d
Torque limiter
✕
1-d
1-d
A
C
B
D
E
Unit
Parts
1
Tandem paper feed
tray unit
tray unit
e
Lift wire (Rear)
F
1-d
1-e
A
B
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