MX-FN28, MX-FN29. Service Manual (Revised April 2017). - Sharp Copying Equipment Service Manual (repair manual). Page 8

MX-FN28/FN29  OPTION  1 – 7

Wipe the brush with wet cloth with a small amount of water. (Recommend)

Handle the brush carefully.

At the gate section, Branch solenoid [B] switches Gate pawl [A],
which changes the transport path of the paper.Switching operation
of Gate pawl is as below.

Proof exit roller, Proof transport roller, and Middle transport roller
are driven by Proof transport motor.Also Entrance transport roller is
driven by Entry port transport motor.

Proof tray full sensor [A] is set to Proof tray.

After a certain amount of paper is ejected, it will be OFF (shielded)
and then detect FULL.

Shift tray moves up/down depending on the number of paper
ejected to the tray (height of the paper surface).  Its height is
detected by Lift tray paper surface sensor [B] being OFF/ON with
Paper sensor lever [A], and the tray is adjusted to move up/down
by Tray lift motor [C] in order that Lift tray paper surface sensor
goes into OFF state (shielded state). 

1

Staple cartridge

X

X

Replacement for every 5,000 staples by the user

2

Staple unit (FN28)

X

X

Replacement reference : Unit replacement for 500K staple

3

Staple unit (FN29)

X

X

Replacement reference : Unit replacement for 300K staple

4

Punch

X

X

Replacement reference : Unit replacement for 1,000K punch

5

Drag roller

X

X

6

Drive roller

X

X

7

Follower roller

X

X

8

Discharge brush

X

X

When there is dirt, wipe brush part with wet cloth and water.

9

Gears

X

X

10

Sintered bearing

X

X

Lubricate when an abnormal sound is heard.

11

Sensor

X

X

 - 

Transport paper guide

X

O

When there is dirt, wipe with wet cloth and water.

Transp
ort 
path

Branch 
solenoi
d

ON

OFF