DOWNLOAD Sharp AR-M155 (serv.man3) Service Manual ↓ Size: 9.09 MB | Pages: 127 in PDF or view online for FREE

AR-M150/M155/M155X  OPERATIONAL DESCRIPTIONS  7 - 5

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.

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 projection of the clutch
sleeve, rotation of the drive gear is not transmitted to the pick-up
roller, which does not rotate therefore.

3) After about 0.1 sec from when the main motor start rotating, the

tray paper feed solenoid (PFS) turns on for 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.

4) After more than half rotation of the pick-up roller, the paper feed

latch is brought in contact with a notch on the clutch sleeve,
stopping rotation of the pick-up roller.

5) At this time, the paper is fed passed the paper entry detection

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.

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, 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. Images are
transferred on the paper, which is separated from the OPC drum
by the drum curve and the separation section.

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.

OFF

PFS

OFF

RRS

OFF

PFS

OFF

RRS

ON

PFS

OFF

RRS

OFF

PFS

ON

RRS

AR-M150/M155/M155X  OPERATIONAL DESCRIPTIONS  7 - 6

1) Before paper feed operation, the manual paper feed solenoid

(MPFS) is turned OFF as shown in the figure 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 surface of the paper to start paper feeding.

3) When pawl C of the manual paper feed clutch sleeve is engaged

with 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.

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 allow synchronization with the lead edge of the image on the
OPC drum.
From this point, the operation is the same as the paper feed
operation from the tray. (Refer to A-5 - 8.)

5) The solenoid turns off to close the gate and return to the initial

state.

OF

MPFS

F

C

A

ON

MPFS

A

C

ON

MPFS

A

C

OF

MPFS

F

A

C

AR-M150/M155/M155X  OPERATIONAL DESCRIPTIONS  7 - 7

Set duplex documents on the document tray.

Set paper on the cassette. (In the duplex mode, the manual feed tray
cannot be selected.)

The document feed roller feeds the document from the paper feed
roller to the PS roller.

• The document is exposed in the exposure section, and sent to the

document exit section

• by the transport/paper exit roller.

• R-SPF gate solenoid ON

• The document is sent to the intermediate tray.

(but not discharged completely.)

• The document is stopped once, then switchback operation is

performed. 

(To the back copy)

The document is passed through the paper feed roller and the PS
roller by the paper feed roller

and the images on the front surface are transferred.

• The paper is passed through the fusing section and the lower side of

the gate section to the paper exit tray side, (but not discharged

completely.)

• It is stopped once and switchback operation is performed.

(To the back copy)

By switchback operation, the document is sent through the PS roller to
the exposure section, where the back of the document is exposed.

• It is sent to the document exit section by the transport roller and the

paper exit roller.

• R-SPF gate solenoid ON. The document is sent to the intermediate

tray, (but not discharged completely.)

• It is stopped once and switchback operation is performed.

• It is sent through the PS roller and the exposure section (without

exposure operation) to the document exit section.

• R-SPF gate solenoid OFF

• The document is discharged to the document exit tray.

Switchback operation is performed.

• The paper is sent through the upper side of the gate section and the

duplex transport section, and the PS roller, and the images on the

back are transferred.

• It is sent through the fusing section and discharged to the paper exit

tray.

a

PPD1 jam

PPD1 does not turn off within 4 sec after turning 
on the resist roller.

b

PPD2 jam

PPD2 is off immediately after turning on the 
resist roller.

PPD2 does not turn off within 1.2 sec after 
turning off the resist roller.

c

POD jam 

POD does not turn on within 2.9 sec after turning 
on the resist roller.

POD does not turn off within 1.5 sec - 2.7 sec 
after turning off PPD2.

AR-M150/M155/M155X  OPERATIONAL DESCRIPTIONS  7 - 8

Switchback operation is made after back copying in order to discharge
documents according to the setting.

Set document Documents after discharge,

There are following job modes as well as D-D mode.

S - S (Simplex to Simplex)

S - D (Simplex to Duplex), 

Rotation copy mode (The back images are rotated 180°C.)

S - D (Simplex to Duplex), Copy mode without rotation

D - S (Duplex to Simplex)

The front and the back are in upside down each other.

The front and the back are not in upside down.

Shift width: 2.5cm

The offset function by the shifter is turned ON/OFF by the user pro-
gram.

According to the setting, offset operation is performed for every job.
(Default: ON)

1

 with empty feed

4

without empty feed

3

2

3

4

3

2

1

4

1

2