Sharp AL-1000 / AL-1010 (serv.man9) Service Manual ▷ View online
Paper feed section and paper transport section
1. Paper transport path and general operations
(1)
Scanner unit
(6)
Main charger
(11) Pickup roller
(2)
Copy lamp
(7)
Heat roller
(12) Manual paper feed tray
(3)
Lens unit
(8)
Pressure roller
(13) Manual paper feed roller
(4)
LSU (Laser unit)
(9)
Drum
(14) PS roller unit
(5)
Paper exit roller
(10) Transfer unit
(15) Paper feed roller
Paper feed is made in two ways; the tray paper feed and the manual paper feed. The tray is of universal-type, and has the capacity
of 250 sheets. The front loading system allow you to install or remove the tray from the front cabinet.
The general descriptions on the tray paper feed and the manual paper feed are given below.
of 250 sheets. The front loading system allow you to install or remove the tray from the front cabinet.
The general descriptions on the tray paper feed and the manual paper feed are given below.
(2)
(4)
(1)
(3)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(13)
(12)
(14)
(15)
A. Cassette paper feed operation
1. The figure below shows the positions of the pick-up roller,
the paper feed clutch sleeve, and the paper feed latch in the
initial state without pressing the COPY button after lighting
the ready lamp.
The paper feed latch is in contact with the projection of the
clutch sleeve.
initial state without pressing the COPY button after lighting
the ready lamp.
The paper feed latch is in contact with the projection of the
clutch sleeve.
2. When the COPY button is pressed, the main drive motor
starts rotating to drive each drive gear.
The pick-up drive gear also is driven at that time. Since,
however, the paper feed latch is in contact with the projec-
tion of the clutch sleeve, rotation of the drive gear is not
transmitted to the pick-up roller, which does not rotate there-
fore.
The pick-up drive gear also is driven at that time. Since,
however, the paper feed latch is in contact with the projec-
tion of the clutch sleeve, rotation of the drive gear is not
transmitted to the pick-up roller, which does not rotate there-
fore.
OFF
PFS
OFF
RRS
AL-1000/1010
7-5
3. After about 0.1 sec from when the main motor start rotating,
the tray paper feed solenoid (PFS) turns on at a moment.
This disengages the paper feed latch from the projection of
the clutch sleeve, transmitting rotation of the pick-up drive
gear to the paper feed roller shaft, rotating the pick-up roller
to feed the paper.
This disengages the paper feed latch from the projection of
the clutch sleeve, transmitting rotation of the pick-up drive
gear to the paper feed roller shaft, rotating the pick-up roller
to feed the paper.
4. After more than half rotation of the pick-up roller, the paper
feed latch is brought in contact with the projection of the
clutch sleeve, stopping rotation of the pick-up roller.
clutch sleeve, stopping rotation of the pick-up roller.
5. At this time, the paper is fed passed the paper entry detec-
tion switch (PPD1), and detected by it. After about 0.15 sec
from detection of paper by PPD1, the tray paper feed
solenoid (PFS) turns on so that the clutch sleeve projection
comes into contact with the paper feed latch to stop the
pick-up roller. Then the pick-up roller rotates for about 0.15
sec so that the lead edge of the paper is evenly pressed on
the resist roller, preventing against skew feeding.
from detection of paper by PPD1, the tray paper feed
solenoid (PFS) turns on so that the clutch sleeve projection
comes into contact with the paper feed latch to stop the
pick-up roller. Then the pick-up roller rotates for about 0.15
sec so that the lead edge of the paper is evenly pressed on
the resist roller, preventing against skew feeding.
6. To release the resist roller, the tray paper feed solenoid and
the resist solenoid are turned on by the paper start signal to
disengage the resist start latch from the clutch sleeve
projection, transmitting rotation of the resist drive gear to the
resist roller shaft. Thus the paper is transported by the resist
roller.
disengage the resist start latch from the clutch sleeve
projection, transmitting rotation of the resist drive gear to the
resist roller shaft. Thus the paper is transported by the resist
roller.
7. After the resist roller starts rotating, the paper is passed
through the pre-transfer guide to the transfer section. Im-
ages are transferred on the paper, which is separated from
the OPC drum by the drum curve and the separation sec-
tion.
ages are transferred on the paper, which is separated from
the OPC drum by the drum curve and the separation sec-
tion.
8. The paper separated from the drum is passed through the
fusing paper guide, the heat roller (fusing section), POD
(paper out detector) to the copy tray.
(paper out detector) to the copy tray.
OFF
PFS
OFF
RRS
ON
PFS
OFF
RRS
OFF
PFS
ON
RRS
AL-1000/1010
7-6
B. Manual multi paper feed operation
1. Before paper feed operation, the manual paper feed
solenoid (MPFS) is turned OFF as shown in the figure
below.
below.
2. When the PRINT button is pressed, the manual paper feed
solenoid (MPFS) turns on to disengage the manual paper
feed latch A from the manual paper feed clutch sleeve A,
rotating the manual paper feed roller and the manual take-
up roller. At the same time, the manual paper feed stopper
opens and the manual take-up roller is pressed to the sur-
face of the paper to start paper feeding.
feed latch A from the manual paper feed clutch sleeve A,
rotating the manual paper feed roller and the manual take-
up roller. At the same time, the manual paper feed stopper
opens and the manual take-up roller is pressed to the sur-
face of the paper to start paper feeding.
3. When pawl C of the manual paper feed clutch sleeve is
hung on the manual feed latch, the manual feed stopper
falls and the manual take-up roller rises. At that time, the
manual paper feed roller is rotating.
falls and the manual take-up roller rises. At that time, the
manual paper feed roller is rotating.
4. The lead edge of the transported paper is pressed on the
resist roller by the transport roller. Then the paper is
stopped temporarily to make synchronization with the lead
edge of the image on the OPC drum.
The operations hereinafter are the same as the paper feed
operations from the tray. (Refer to A-5
stopped temporarily to make synchronization with the lead
edge of the image on the OPC drum.
The operations hereinafter are the same as the paper feed
operations from the tray. (Refer to A-5
∼
8.)
OF
MPFS
F
C
A
ON
MPFS
A
C
ON
MPFS
A
C
AL-1000/1010
7-7
5. The solenoid turns off to close the gate and return to the in-
itial state.
C. Conditions of occurrence of paper misfeed
(1) When the power is turned on:
PPD or POD is ON when the power is turned on.
(2) Copy operation
a. PPD1 jam 1) PPD1 does not turn off within 4 sec
after turning on the resist roller.
b. PPD2 jam 1) PPD2 is off immediately after turning on
the resist roller.
2) PPD2 does not turn off within 1.2 sec
after turning off the resist roller.
c. POD jam
1) POD does not turn on within 2.9 sec
after turning on the resist roller.
2) POD does not turn off within 1.5 sec
∼
2.7 sec after turning off PPD2.
Process unit new drum detection
mechanism
mechanism
1. When the power is turned on, the detection gear 38T is
rotated in the arrow direction by the detection gear 20T to
push the microswitch (process detection switch) installed to
the machine sensor cover, making a judgement as a new
drum.
push the microswitch (process detection switch) installed to
the machine sensor cover, making a judgement as a new
drum.
2. When the detection gear 38Y turns one rotation, there is no
gear any more and it stops.
The latch section of the 38T gear is latched and fixed with
the projection of the process cover.
The latch section of the 38T gear is latched and fixed with
the projection of the process cover.
OF
MPFS
F
A
C
Gear 20T
Process detection switch
Gear 38T
Gear notch
Gear pawl
Projection
Gear notch
Gear pawl
Projection
AL-1000/1010
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