Sharp MX-FN23 User manual

SERVICE MANUAL
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
[1] PRODUCT OUTLINE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[2] SPECIFICTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
[3] EXTERNAL VIEW AND INTERNAL STRUCTURE . . . . . . . . . . . . . 3-1
[4] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
[5] TROUBLE CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
[6] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
[7] MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
[8] DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
[9] SIGNAL LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
[10] ACTUAL WIRING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
TopPage
CONTENTS
CODE: 00ZMXFN23/S1E
MX-FN23
MODEL
DIGITAL MULTIFUNCTIONAL SYSTEM
OPTION
FINISHER

CONTENTS
[1] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
[2] SPECIFICTIONS
1. Basic specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
[3] EXTERNAL VIEW AND INTERNAL STRUCTURE
1. External and Internal View . . . . . . . . . . . . . . . . . . . . . . .3-1
2. Detectors and Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3. Motors, Solenoids, Gate, PWB, Switch and Fan . . . . . .3-3
[4] ADJUSTMENTS
1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
2. List of adjustment items . . . . . . . . . . . . . . . . . . . . . . . . .4-1
3. Details of adjustment and setting . . . . . . . . . . . . . . . . . .4-1
[5] TROUBLE CODE
1. Trouble code list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
2. Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
[6] OPERATIONAL DESCRIPTIONS
1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
2. Outline of the transport path . . . . . . . . . . . . . . . . . . . . . 6-1
3. Offset mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
4. Staple mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
5. Electrical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
[7] MAINTENANCE
1. Maintenance system table. . . . . . . . . . . . . . . . . . . . . . . 7-1
[8] DISASSEMBLY AND ASSEMBLY
1. External view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
2. Paper entry, alignment, staple. . . . . . . . . . . . . . . . . . . . 8-2
3. Paper delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
4. Others . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
5. Fan disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
[9] SIGNAL LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
[10] ACTUAL WIRING CHART . . . . . . . . . . . . . . . . . . . . . . . . 10-1

MX-FN23 PRODUCT OUTLINE 1 – 1
[1] PRODUCT OUTLINE
The FN-23 is a post-processing unit of output paper from a copier, a printer, or a fax machine, which is installed to the machine below.
It is provided with the offset function which discharges output paper by shifting copy by copy, and the staple function (only one position sta-
pling).
Since it is installed to the center tray of the machine, there is no extra space for installation.
The finisher needs a staple cartridge as a consumable part. (Staple cartridge (About 5,000 staples x 3 pcs.) MX-SCX1)
Applicable model MX-M264U/M314U/M354U
MX-M264N/M314N/M354N
Finisher
[MX-FN23]
Staple cartridge
Digital multifunctional system
[MX-M264U/M314U/M354U]
[MX-M264N/M314N/M354N]

MX-FN23 SPECIFICTIONS 2 – 1
[2] SPECIFICTIONS
1. Basic specifications
(1) Basic specifications
*1: China only
Model name MX-FN23
Name Finisher
Type Built-in type
Paper transport reference Center reference
Loading method Lifting method offset tray
Mode Non-sort offset sort, staple sort
Power consumption About 49W
Power source Supplied from the main unit
Dimensions (W x D x H mm) 472 x 461 x 199mm (When the paper delivery tray is extended: Width 619mm)
Occupying size Conforms to the main unit.
Weight 13.0kg (including the connection unit, excluding the second paper delivery unit.)
Stacker section
Offset quantity 30mm
Stacking
capability
Non-sort Bottom direction (Y) : 25mm or less
Paper exit direction (X) : 25mm or less
Offset Bottom direction (Y) : 25mm or less
Paper exit direction (X) : 25mm or less
Staple alignment (Shift in a job) X,Y : 2.5mm
Paper exit
storage capacity
Non-staple
mode
250 sheets or 35.5mm or less (A3, B4, 11 x 17, 8.5 x 14, 8.5 x 13, 8K*)
500 sheets or 71mm or less (A4, A4R, B5, B5R, 8.5 x 11, 8.5 x 11R, 16K*, 16KR*)
*: 8K, 16K, and 16KR are valid only for China.
100 sheets or 35.5mm or less (A5, A5R, 5.5 x 8.5, 5.5 x 8.5R, B6R, Postcard, OHP, Label sheet, Envelope (20 sheets))
Note: Offset is disabled for Postcard, OHP, Label, Tab paper and Envelope.
Stapling mode 30 section, or 250 sheets, or 35.5mm or less (fixed size paper greater than A4R) (Documents in mixed sizes with the same
width)
30 section, or 500 sheets, or 71mm or less (fixed size paper smaller than A4R)
Note: Stapling heavy paper is only available for front and back cover.
Paper empty detection YES
Paper delivery tray full detection YES
Staple section
Binding position Rear one position binding
Binding quantity 50 sheets (A4, A4R, B5, B5R, 8.5 x 11, 8.5 x 11R, 16K*1, 16KR*1)
30 sheets (A3, B4, 11 x 17, 8.5 x 14, 8.5 x 13, 8K*1)
Mixed load (same width) stapling: 30 sheets
Staple loading method Staple cartridge (5000 staples) (MX-SCX1)
Staple empty detection YES
Manual staple mode NO

MX-FN23 SPECIFICTIONS 2 – 2
(2) Usable Paper size/weight
*1: Paper is passed, but alignment is not assured.
*2: Paper is passed and stapling is performed, but alignment is not assured.
*3: For heavy paper of 129g/m2or more, alignment is not assured.
*4: Available only for the front cover and the back cover.
*5: Can be output but in not supported.
*6: Comply to "Paper typesetting".
*7: Custom size.
Normal paper exit Offset Staple mode
Paper size 11" x 17" Yes Yes Yes
8.5" x 14" (216 x 356) Yes Yes Yes
8.5" x 13.4" (216 x 340) Yes No No
8.5" x 13" (216 x 330) Yes Yes Yes
8.5" x 11" Yes Yes Yes
8.5" x 11"R Yes Yes Yes
7.25" x 10.5"R Yes*1No No
5.5" x 8.5"R Yes*1No No
5.5" x 8.5" Yes*1Yes*1No
A3 Yes Yes Yes
B4 Yes Yes Yes
A4 Yes Yes Yes
A4R Yes Yes Yes
B5 Yes Yes Yes
B5R Yes No Yes
A5R Yes*1No No
A5 Yes*1Yes* 1No
B6R Yes*1No No
8K Yes Yes Yes
16K Yes Yes Yes
16KR Yes No Yes
A6R Yes*1No No
Envelope Commercial10 (4-1/8" x 9-1/2") Yes*1No No
International DL (110mm x 220mm) Yes*1No No
International C5 (162mm x 229mm) Yes*1No No
Extra Yes*1No No
Custom*7Yes*1No No
Paper type Thin paper 56-59g/m2Yes*1Ye s *1Yes*2
Plain paper 60-90g/m2Yes Yes Yes
Recycled paper Yes Yes Yes
Heavy paper Max. 200g/m2Yes*3 Ye s *3Yes*4
Envelope Commercial10 (4-1/8" x 9-1/2") Yes*1No No
International DL (110mm x 220mm) Yes*1No No
International C5 (162mm x 229mm) Yes*1No No
Monarch Yes*1No No
OHP Yes*1No No
Label sheet (SF-4A3F) Yes*1No No
Tab paper Yes*5No No
User settings 1-7 Yes*6Yes Yes
AB System (mm) Inch Systm (inch)
Min. Max. Min. Max.
Bypass tray X 140 432 5-1/2 17
Y 100 297 5-1/2 11-5/8
Duplex X 182 432 8-1/2 17
Y 182 297 7-1/4 11-5/8

MX-FN23 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 1
DS)Options
[3] EXTERNAL VIEW AND INTERNAL STRUCTURE
1. External and Internal View
No. Name Function/Operation
1 Paper delivery extension tray When making copy or print of a size longer than B5R, pull this section out.
2 Paper delivery tray Copied or printed paper is discharged to this tray.
3 Finisher upper paper guide Only the lead edge section of switch-backed paper is discharged to this section, and then transported to the switch-back
section.
4 Finisher connection lock pawl This pawl locks the finisher to the machine.
By turning the separation lever, this pawl operates to release lock of finisher.
5 Staple cartridge Staples are stored in this cartridge. (Consumable part)
6 Separation lever When replacing a staple cartridge or removing jam paper, turn this lever to the left and slide the whole finisher to the left.
7 JAM cancel knob When a jam occurs in the finisher, turn this knob to remove the jam paper.
1 2 3
47 456

MX-FN23 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 2
2. Detectors and Rollers
Detectors
Rollers
Signal name Name Type Function/Operation
FAPHPS-F Paper alignment plate home
position sensor F
Transmission type Detects the home position of the paper alignment plate on the front side.
FAPHPS-R Paper alignment plate home
position sensor R
Transmission type Detects the home position of the paper alignment plate on the rear side.
FDRPS Delivery roller position sensor Transmission type Detects that the delivery roller is in the home position.
FDTLLS Delivery tray lower limit sensor Transmission type Detects the lower limit position of the paper delivery tray.
FDTPD Paper delivery tray paper
detector
Paper on the paper delivery tray is detected.
FPLD Paper level detector Transmission type Detects the paper height position of the paper delivery tray (movable section).
FPLS Paper level sensor Reflection type Detects the paper height position of the paper delivery tray (movable section) during a
staple job.
FPPD1 Paper pass detector Reflection type Detects paper entry in the finisher.
FPRD Paper rear edge detector Transmission type Detects that the rear edge of paper transported to the compiler reaches the rear edge of
the compiler.
FSTPD Staple tray paper detector Transmission type Detects paper presence in the staple compiler.
FTPS Delivery tray position sensor Detects the intermediate position of the paper delivery tray.
No. Name Function/Operation
1 Paper delivery roller Discharges paper from the staple compiler to the paper delivery tray.
2 Take-up roller Transports paper which is transported into the staple compiler to the rear edge plate.
3 Paper entry roller (Idle) Applies a pressure to paper and the transport roller to give a transport power of the transport roller to paper.
4 Paper entry roller Transports paper (which is transported from the copier) to the staple compiler.
5 Rear edge take-up roller Drives paper (which is transported to the staple compiler) to the rear edge plate.
6 Paper delivery roller (Idle) Gives a transport power of the transport roller to paper.
FPLD
FPLS
FPPD1
FPRD
FSTPD
FDTPD
FAPHPS-F
FAPHPS-R
FDRPS
12 34
56
FDTLLS
FTPS

MX-FN23 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 3
3. Motors, Solenoids, Gate, PWB, Switch and Fan
Motors
Solenoids
Gate
PWB
Switch
Fan
Signal name Name Type Function/Operation
FDRLM Delivery roller lift motor Stepping motor Moves the paper delivery roller up and down.
FPAM-F Paper alignment motor F Stepping motor Drives the paper alignment plate F.
FPAM-R Paper alignment motor R Stepping motor Drives the paper alignment plate R.
FPDM Paper delivery motor Stepping motor Drives the paper delivery roller and the take-up roller. Also moves the take-up roller up
and down.
FPTM Paper transport motor Stepping motor Drives the paper entry roller and the rear edge take-up roller.
FSM Stalpe motor Drives the staple unit.
FTLM Tray lift motor DC brush motor Drives the paper delivery tray (movable section).
Signal name Name Type Function/Operation
FARLS Alignment roller lift
solenoid
Electromagnetic solenoid Controls up-down movement of the rear edge take-up roller.
FPGS Paper gate solenoid Electromagnetic solenoid Drives the select gate of the paper transport path of paper transported to the switch-
back section and paper transported to the paper delivery tray.
FPS Paddle solenoid Electromagnetic solenoid Controls ON/OFF of the paddler rotation.
No. Name Function/Operation
1 Paper entry gate Selects the paper transport path to the switch back section and to the paper delivery tray.
No. Name Function/Operation
2 Control PWB Controls the operation of the finisher.
3 LED PWB Illuminates the staple unit.
No. Name Function/Operation
4 Safety switch Detects open/close of the front cover to turn ON/OFF the motor power.
Signal name Name Type Function/Operation
FCF Finisher cooling fan motor DC brush motor Cools the paper exit motor.
FDRLM
FPAM-F FPAM-R
FPDM
FPTM
FSM
FTLM
FARLS
FPGS
FPS FCF
1
24 3

MX-FN23 ADJUSTMENTS 4 – 1
[4] ADJUSTMENTS
1. General
Perform an adjustments when a problem occurs.
If the adjustment value is changed when there is no trouble in the
machine, a trouble may be generated such as improper alignment
of paper, paper exit jam, attachment of roller marks on paper, etc.
2. List of adjustment items
3. Details of adjustment and setting
ADJ 1 Paper alignment width
adjustment
This adjustment is executed when a trouble occurs in paper align-
ment.
1) Execute Sim3-10.
2) Select "1: FPAM ADJUST".
3) Enter the set value with 10-key. (Press [C] key to clear the
entered values.)
Initial value: 50
When the adjustment value is increased by 1, the alignment
plate F/R width is narrowed by 0.419mm in alignment opera-
tion.
When the adjustment value is decreased by 1, the alignment
plate F/R width is widened by 0.419mm in alignment operation.
The alignment plate F and the alignment plate R cannot be
adjusted separately. The shift amount on the F side and that
on the R side are alternatively corrected everytime the adjust-
ment value is increased by 1. (Correction with 51 for the F
side, and 52 for the R side. ... 59 for the F aide, and 60 for the
R side. Similar when the set value is decreased.) When, how-
ever, the alignment plate lower cannot be adjusted due to the
mechanism structure, adjust only on the R side without cor-
recting both of the F and the R side.
4) Press [OK] key to save the set value.
5) After completion of the adjustment, make staple copies.
Alignment specification: Within 2.5mm
ADJ 2 Paper delivery roller
descending position
adjustment
This adjustment is executed when a paper exit jam occurs or when
roller marks of the paper delivery roller are attached to paper.
1) Execute Sim3-10.
2) Select "2: FDRLM ADJUST".
3) Enter the set value with 10-key. (Press [C] key to clear the
entered values.)
Initial value: 50
When the adjustment value is increased by 1, the shift amount
of the paper delivery roller is changed by 0.13mm toward the
pressure increasing side (*1).
When the adjustment value is decreased by 1, the shift
amount of the paper delivery roller is changed by 0.13mm
toward the pressure decreasing side (*1).
*1: The pressure increasing side means the direction to
increase the paper delivery roller pressure onto paper, and
the pressure decrease side means the direction to
decrease the paper delivery roller pressure onto paper.
4) Press [OK] key to save the set value.
Job No Adjustment items Simulation
to be used
ADJ1 Paper alignment width adjustment 3-10
ADJ2 Paper delivery roller descending position
adjustment
3-10
SIMULATION 3-10
FINISHER SETTING. SELECT 1-2, AND PRESS START.
1: FPAM ADJUST 50 1
2: FDRLM ADJUST 50
SIMULATION 3-10
FINISHER SETTING. INPUT VALUE 40-60, AND PRESS
START.
1: FPAM ADJUST 50
Select 1 and
press [START] key. Press [CUSTOM SETTINGS] key.
SIMULATION 3-10
FINISHER SETTING. SELECT 1-2, AND PRESS START.
1: FPAM ADJUST 50 2
2: FDRLM ADJUST 50
SIMULATION 3-10
FINISHER SETTING. INPUT VALUE 40-60, AND PRESS
START.
2: FDRLM ADJUST 50
Select 2 and
press [START] key. Press [CUSTOM SETTINGS] key.

MX-FN23 TROUBLE CODE 5 – 1
[5] TROUBLE CODE
1. Trouble code list
2. Details
F1-00 Finisher communication trouble
F1-03 Finisher delivery roller lift motor
trouble
F1-10 Finisher staple motor trouble
F1-15 Finisher tray lift motor trouble
MAIN
CODE
SUB
CODE Content Section Operation mode Remedy NOTE
F1 00 Finisher communication trouble FIN When communicating Turn ON/OFF the power.
03 Finisher delivery roller lift motor trouble FIN When the roller is operating Check the connection state.
10 Finisher staple motor trouble FIN When the staple is operating Check the connection state.
15 Finisher tray lift motor trouble FIN When the tray is operating Check the connection state.
19 Finisher paper alignment motor F trouble FIN When the alignment plate is operating Check the connection state.
20 Finisher paper alignment motor R trouble FIN When the alignment plate is operating Check the connection state.
29 Finisher cooling fan trouble FIN When paper is delivered. Check the paper exit, etc.
37 Finisher RAM data trouble FIN When the RAM is accessed. Check the connection state.
50 Finisher incompatible trouble FIN When the power is turned ON Check the connection state.
Phenomenon Communication error with the finisher.
Communication line test error after turning ON the
power or canceling the exclusive simulation.
Case 1 Cause Connection trouble or disconnection of the connector
and the harness.
Check &
Remedy
Check the connector and the harness in the
communication line.
Connect the connector properly. Replace the
harness.
Case 2 Cause Finisher control PWB trouble. Control PWB (PCU)
trouble.
Check &
Remedy
Replace the finisher control PWB or the control PWB
(PCU).
Case 3 Cause Malfunctions caused by noises.
Check &
Remedy
Canceled by turning OFF/ON the power.
Phenomenon Up/down operation trouble of the paper delivery
roller.
Case 1 Cause Connection trouble or disconnection of the connector
and the harness of the motor
Check &
Remedy
Check the connection of the connector and the
harness in the motor line with the finisher control
PWB.
Connect the connector properly. Replace the
harness.
Case 2 Cause Delivery roller position sensor (FDRPS) trouble.
Check &
Remedy
Check to confirm that the FDRPS turns ON/OFF with
SIM3-2.
If it does not turn ON/OFF, check the connection of
the connector and the harness of the sensor.
Replace the sensor.
Case 3 Cause Motor lock, an overcurrent to the motor, intrusion of
foreign material.
Check &
Remedy
Select the FDRLM with SIM3-3 to check the
operation of the single unit.
Check to confirm that there is no foreign material in
the drive system.
Case 4 Cause Finisher control PWB trouble. Motor trouble
Check &
Remedy
Replace the finisher control PWB or the motor.
Phenomenon Staple motor operation trouble
Case 1 Cause Connection trouble or disconnection of the connector
and the harness of the staple unit.
Check &
Remedy
Check the connection of the connector and the
harness between the finisher control PWB and the
staple unit line.
Connect the connector properly. Replace the
harness.
Case 2 Cause Motor lock, an overcurrent to the motor, intrusion of
foreign material.
Check &
Remedy
Select the FSM with SIM3-3 to check the operation of
the single unit.
Check to confirm that there is no foreign material in
the staple unit.
Case 3 Cause Finisher control PWB trouble. Staple unit trouble.
Check &
Remedy
Replace the finisher control PWB or the staple unit.
Phenomenon Up/down operation trouble of the paper delivery tray
Case 1 Cause Connection trouble or disconnection of the connector
and the harness of the motor
Check &
Remedy
Check the connection of the connector and the
harness in the motor line with the finisher control
PWB.
Connect the connector properly. Replace the
harness.
Case 2 Cause Paper level detector (FPLD) trouble.
Check &
Remedy
Check to confirm that the FPLD turns ON/OFF with
SIM3-2.
If it does not turn ON/OFF, check the connection of
the connector and the harness of the sensor.
Replace the sensor.
Case 3 Cause Delivery tray lower limt sensor (FDTLLS) trouble.
Check &
Remedy
Check to confirm that the FDTLLS turns ON/OFF
with SIM3-2.
If it does not turn ON/OFF, check the connection of
the connector and the harness of the sensor.
Replace the sensor.
Case 4 Cause Motor lock, an overcurrent to the motor, intrusion of
foreign material.
Check &
Remedy
Select the FTLM with SIM3-3 to check the operation
of the single unit.
Check to confirm that there is no foreign material in
the drive system.
Case 5 Cause Finisher control PWB trouble. Motor trouble
Check &
Remedy
Replace the finisher control PWB or the motor.

MX-FN23 TROUBLE CODE 5 – 2
F1-19 Finisher paper alignment motor F
trouble
F1-20 Finisher paper alignment motor R
trouble
F1-29 Finisher cooling fan trouble
F1-37 Finisher RAM data trouble
F1-50 Finisher incompatible trouble
Phenomenon Operation trouble of the paper alignment plate F
Case 1 Cause Connection trouble or disconnection of the connector
and the harness of the motor
Check &
Remedy
Check the connection of the connector and the
harness in the motor line with the finisher control
PWB.
Connect the connector properly. Replace the
harness.
Case 2 Cause Paper alignment plate home position sensor F
(FAPHPS-F) trouble.
Check &
Remedy
Check to confirm that the FAPHPS-F turns ON/OFF
with SIM3-2.
If it does not turn ON/OFF, check the connection of
the connector and the harness of the sensor.
Replace the sensor.
Case 3 Cause Motor lock, an overcurrent to the motor, intrusion of
foreign material.
Check &
Remedy
Select the FPAM-F with SIM3-3 to check the
operation of the single unit.
Check to confirm that there is no foreign material in
the drive section and the alignment plate.
Case 4 Cause Finisher control PWB trouble. Motor trouble
Check &
Remedy
Replace the finisher control PWB or the motor.
Phenomenon Operation trouble of the paper alignment plate R
Case 1 Cause Connection trouble or disconnection of the connector
and the harness of the motor
Check &
Remedy
Check the connection of the connector and the
harness in the motor line with the finisher control
PWB.
Connect the connector properly. Replace the
harness.
Case 2 Cause Paper alignment plate home position sensor R
(FAPHPS-R) trouble.
Check &
Remedy
Check to confirm that the FAPHPS-R turns ON/OFF
with SIM3-2.
If it does not turn ON/OFF, check the connection of
the connector and the harness of the sensor.
Replace the sensor.
Case 3 Cause Motor lock, an overcurrent to the motor, intrusion of
foreign material.
Check &
Remedy
Select the FPAM-R with SIM3-3 to check the
operation of the single unit.
Check to confirm that there is no foreign material in
the drive section and the alignment plate.
Case 4 Cause Finisher control PWB trouble. Motor trouble
Check &
Remedy
Replace the finisher control PWB or the motor.
Phenomenon When the finisher cooling fan is operating, the lock
signal is not canceled in a certain time.
Case 1 Cause Improper connection or disconnection of the fan
connector and harness.
Check &
Remedy
Check the connector and harness of the finisher
control PWB and the fan line.
Connect the connector securely. Replace the
harness.
Case 2 Cause Motor lock, an over current to the motor, intrusion of
a foreign material.
Check &
Remedy
Select the FCF with SIM03-03 and check the
operation of the single unit.
Case 3 Cause Finisher control PWB trouble, fan trouble.
Check &
Remedy
Replace the finisher control PWB or the staple unit.
Phenomenon Backup RAM operation trouble
Case 1 Cause Finisher control PWB trouble. EEPROM trouble.
Check &
Remedy
Replace the finisher control PWB or the EEPROM.
Phenomenon Connection of a finisher incompatible with the
machine is detected.
Case 1 Cause Connection of a finisher incompatible with the
machine is detected.
Check &
Remedy
Connect the MX-FN23 to the machine.

MX-FN23 OPERATIONAL DESCRIPTIONS 6 – 1
[6] OPERATIONAL DESCRIPTIONS
1. General
This chapter describes the operations of the finisher.
The major operation modes are as follows:
• Offset mode
• Staple mode
In this chapter, the basic operations in the above two modes are described.
2. Outline of the transport path
The outline of the transport path is described below.
3. Offset mode
When the operation mode command is received from the copier,
the finisher starts the transport operation.
A. Reception of paper discharged from the main
unit
1) The paper delivery motor (FPDM) is driven in the paper deliv-
ery direction to lift the take-up roller. When a flapper solenoid
request (finisher paper pass) is received, the paper gate sole-
noid (FPGS) is turned ON to switch the paper pass gate to the
finisher side.
2) When paper enters the finisher, the paper transport motor
(FPTM) is driven at the machine paper delivery speed to
receive paper delivery from the machine.
3) When the rear edge of paper passes the paper delivery roller
of the machine, the paper transport motor (FPTM) is acceler-
ated to 400mm/sec. After a lapse of a certain time, the paper
alignment motor F (FPAM-F) and the paper alignment motor R
(FPAM-R) are driven to make the paper alignment plate stand
by outside of paper. Then, the alignment roller lift solenoid
(FARLS) is turned ON to lift the rear edge take-up roller.
No. Name No. Name
1 Delivery movable tray 8 Paper pass detector
2 Paper delivery tray paper detector 9 Paper pass gate
3 Delivery paddler 10 Stapler
4 Paper delivery roller 11 Rear edge plate
5 Take-up roller 12 Paper rear edge detector
6 Paper alignment plate (F, R) 13 Rear edge take-up roller
7 Paper pass roller 14 Paper level actuator
45 7
10
31 6
11121314
2 8 9

MX-FN23 OPERATIONAL DESCRIPTIONS 6 – 2
B. Paper alignment
1) When the rear edge of paper passes the paper pass roller, the
paper delivery motor (FPDM) is driven in the reversing direc-
tion at 400mm/sec, descending and rotating the take-up roller
to pull the paper rear edge to the rear edge plate.
2) After a lapse of time from detecting ON of the paper rear edge
detector (FPRD), the paper delivery motor (FPDM) is driven in
the paper delivery direction at 400mm/sec, lifting the take-up
roller and rotating the paper delivery roller. At the same time,
the delivery roller lift motor (FDRLM) is driven downward to
shift to the stand-by position of the paper delivery roller.
3) After the take-up roller is lifted, the paper alignment motor F
(FPAM-F) and the paper alignment motor R (FPAM-R) are
driven by a certain level to align paper to the front side or to the
rear side.
C. Paper delivery
1) After completion of alignment, the delivery roller lift motor
(FDRLM) is driven downward to lower the paper delivery roller
to the paper delivery position, discharging paper in the process
tray.
2) After detecting OFF of the paper rear edge detector (FPRD),
the paddle solenoid (FPS) is turned ON to shift to the delivery
paddler to the save position.
3) After a lapse of time from detecting OFF of the paper rear
edge detector (FPRD), the paper delivery motor (FPDM) is
decelerated to decelerate paper delivery. At the same time, the
paper alignment motor F (FPAM-F) and the paper alignment
motor R (FPAM-R) are driven to shift the paper alignment plate
to the home position.
The alignment roller lift solenoid (FARLS) is turned OFF to
descend the rear edge take-up roller.
4) After the paper passes the paper delivery roller, the delivery
roller lift motor (FDRLM) is driven upward to lift the paper deliv-
ery roller to the home position.
5) After lifting the paper delivery roller, the paddle solenoid (FPS)
is turned OFF to rotate the paper delivery paddler one turn and
to press paper with the paper level actuator.
6) When there is the next paper, repeat the procedures from "A-
2)". In the same bundle, however, the alignment direction of
the paper alignment plate is the same. When the bundle is
changed, the alignment position is changed to the opposite to
that of the previous bundle.
7) If there is no paper following, each actuator is turned OFF to
complete the transport operations.
4. Staple mode
When the operation mode command is received from the copier,
the finisher starts the transport operation.
A. Reception of paper discharged from the main
unit
1) The paper delivery motor (FPDM) is driven in the paper deliv-
ery direction to lift the take-up roller. When a flapper solenoid
request (finisher paper pass) is received, the paper gate sole-
noid (FPGS) is turned ON to switch the paper pass gate to the
finisher side.
2) When paper enters the finisher, the paper transport motor
(FPTM) is driven at the machine paper delivery speed to
receive paper delivery from the machine.
3) When the rear edge of paper passes the paper delivery roller
of the machine, the paper transport motor (FPTM) is acceler-
ated to 400mm/sec. After a lapse of a certain time, the paper
alignment motor F (FPAM-F) and the paper alignment motor R
(FPAM-R) are driven to make the paper alignment plate stand
by outside of paper.

MX-FN23 OPERATIONAL DESCRIPTIONS 6 – 3
B. Paper alignment and stapling
1) When the rear edge of paper passes the paper pass roller, the
paper delivery motor (FPDM) is driven in the reversing direc-
tion at 400mm/sec, descending and rotating the take-up roller
to pull the paper rear edge to the rear edge plate.
2) After a lapse of time from detecting ON of the paper rear edge
detector (FPRD), the paper delivery motor (FPDM) is driven in
the paper delivery direction at 400mm/sec, lifting the take-up
roller and rotating the paper delivery roller.
3) After a lapse of a certain time from detecting ON of the paper
rear edge detector (FPRD), the paper alignment motor F
(FPAM-F) or the paper alignment motor R (FPAM-R) is driven
by a certain level depending on the paper to be aligned to align
paper to the staple position.
4) After completion of alignment, the alignment roller lift solenoid
(FARLS) is turned OFF to descend the rear edge take-up
roller. If two or more sheets of paper are aligned, the alignment
motor operated in procedure 3) to shift the paper alignment
plate to the home position. The operations from [A-2] are
repeated for the specified number of sheets. After completion
of alignment of the specified number of sheets, the staple
motor (FSM) is driven to perform stapling.
C. Paper delivery
1) After stapling, the paper alignment motor R (FPAM-R) and the
paper alignment motor F (FPAM-F) are driven to separate the
paper alignment plate 3mm away from paper. At the same
time, the delivery roller lift motor (FDRLM) is driven downward
by a certain level to shift the paper delivery roller to the paper
delivery position, discharging the paper bundle from the pro-
cess tray.
2) After detecting OFF of the paper rear edge detector (FPRD),
the paddle solenoid (FPS) is turned ON to shift to the delivery
paddler to the save position.
3) After a lapse of time from detecting OFF of the paper rear
edge detector (FPRD), the paper delivery motor (FPDM) is
decelerated to decelerate paper delivery. At the same time, the
paper alignment motor F (FPAM-F) and the paper alignment
motor R (FPAM-R) are driven to shift the paper alignment plate
to the home position.
The alignment roller lift solenoid (FARLS) is turned OFF to
descend the rear edge take-up roller.
4) After the paper passes the paper delivery roller, the delivery
roller lift motor (FDRLM) is driven upward to lift the delivery
roller to the home position.
5) After lifting the paper delivery roller, the paddle solenoid (FPS)
is turned OFF to rotate the paper delivery paddler one turn and
to press paper with the paper level actuator.
6) When there is the next paper, repeat the procedures from "A-
2)".
7) If there is no paper following, each actuator is turned OFF to
complete the transport operations.

MX-FN23 OPERATIONAL DESCRIPTIONS 6 – 4
5. Electrical section
A. Overall block diagram
CPU)
7
13
2/S
8
H(
(STA457C)
(2SB1240 x4)
+24V
+24V
+24V
P-GND
FG
WSSF
FAPHPS-R FPRD FAPHPS-F FSTPD FDTLLS FPLD FDRPS
+5V
+5V +5V +5V +5V +5V +5V +5V +5V +5V
+5VR
FTPS FPPD1
S-GND
MX-FN23
FDTPD
FPLS
+24VR
+24VR +24V
Paper alignment motor F Delivery roller lift motor
Paper delivery motor
Paper transport motor Paper alignment motor R
H bridge circuit
Tray lift motor
Paddle solenoid
Paper gate solenoid Alignment roller lift solenoid
Transistor array
Fan motor drive circuit
Not installed
LED PWB UN
Illumination of the staple unit Cooling fan motor
RxD-FIN
+3.3V+5V
+24V +24VR
TxD-FIN DSR-FIN /DTR-FIN /RES-FIN FINDET
Input buffer Input buffer
Output buffer Output buffer
Input buffer
3-terminal Reg
Input buffer
Safety switch
On-board
writing circuit
Main unit
FPAPD FDRLPD FPDPD FPTPD
STLK FCF-LD
FSL
FPAM-F FPAM-R FDRLM FPDM FPTM
FSM FSHPS FSED FSLD FTLM
FPGS FPS FARLS
FCF FSL
+24V +24V
+24VR +24VR
+5V
+24VR
+5VR
(TD62003APG)
Paper rear edge detector Paper alignment plate home position sensor F Staple tray paper detector Paper level detector Delivery tray lower limit sensor Delivery tray position sensor
Paper pass detector Delivery roller position sensor
Paper alignment plate home position sensor R Paper delivery tray paper detector Paper level sensor
IF MAIN PWB UN
Sensor
in put
circuit
Chopping
circuit
(STA7101M)
Chopping
circuit
(STA7101M)
Chopping
circuit
(STA7101M)
Chopping
circuit
(STA7101M) (STA7101M)
Chopping
circuit
H bridge circuit
Staple Motor Staple home position sensor Staple empty detector Staple lead detector
Staple unit
(RQJ0602EGDQS)

MX-FN23 MAINTENANCE 7 – 1
[7] MAINTENANCE
1. Maintenance system table
5: Check {: Clean s: Replace U: Adjust I: Lubricate
No. Part name 75K 150K 225K 300K 375K 450K 525K 600K Remark
1 Rear edge take-up roller 55555555Replace as needed.
Supply of service parts
2 Staple cartridge Replace at every 5K. Replacement is made by the user.
1
2

MX-FN23 DISASSEMBLY AND ASSEMBLY 8 – 1
[8] DISASSEMBLY AND
ASSEMBLY
1. External view
A. Finisher
1) Remove the hand screw from the finisher connection connec-
tor on the side of the machine, and remove the machine con-
nection harness from the finisher.
2) Open the front cover. Remove the resin clip, and remove the
front cover.
3) Remove the screw, and remove the left cabinet of the
machine.
4) Open the front cabinet of the machine.
5) Remove the screw, and remove the front cabinet lower and the
connection cabinet.
6) Release the lock with the separation lever, and slide the fin-
isher to the left.
7) Remove the connection plate, and slide the finisher toward
you.
8) Remove the finisher.

MX-FN23 DISASSEMBLY AND ASSEMBLY 8 – 2
B. Main PWB cover
1) Remove the screw, and remove the main PWB cover.
C. Front cabinet
1) Remove the screw, and remove the separation lever. Remove
the screw, and remove the front cabinet.
D. Rear cabinet
1) Remove the screw, and remove the rear cabinet.
E. Paper entry paper guide unit
1) Remove the screw, and remove the paper entry paper guide
unit.
F. Upper paper guide
1) Remove the screw, and remove the upper paper guide.
2. Paper entry, alignment, staple
A. Staple cartridge
1) Open the front cover.
2) Turn the separation lever to the left to separate the finisher
from the machine.
3) Pull the lever of the staple case to remove the staple case.
NOTE: When installing the staple case, push it until it locks.

MX-FN23 DISASSEMBLY AND ASSEMBLY 8 – 3
4) Remove the staple cartridge.
NOTE: When installing the staple cartridge, push it until it locks.
NOTE: If there is any staple remaining in the staple cartridge, the
cartridge cannot be removed.
B. Staple motor
1) Remove the main PWB cover.
2) Disconnect the connector, remove the screw, and remove the
staple motor.
C. Paper gate solenoid
1) Remove the front cabinet.
2) Disconnect the connector, remove the screw, and remove the
paper gate solenoid mounting plate unit.
3) Remove the screw, and remove the paper gate solenoid.
NOTE: After fixing the paper gate solenoid, the plunger must be in
contact with the molt (F/R) of the paper entry lower PG in
the free state.
Press the plunger with your finger to check to confirm that it
is in contact with the molt (F/R) of the paper entry upper
PG.
D. Safety switch
1) Disconnect the connector, remove the screw, and remove the
safety switch.
E. Paper pass detector
1) Remove the paper entry paper guide unit.
2) Remove the upper paper guide.
3) Remove the screw, remove the mounting plate, and discon-
nect the connector. Remove the screw, and remove the paper
entry detector.

MX-FN23 DISASSEMBLY AND ASSEMBLY 8 – 4
F. Paper rear edge detector
1) Disconnect the connector, remove the screw, and remove the
upper stay right unit.
2) Remove the screw, and remove the ST paper entry paper
guide lower.
3) Remove the paper rear edge detector, and disconnect the con-
nector.
G. Paper transport motor
1) Disconnect the connector, remove the screw, and remove the
harness holder.
2) Disconnect the connector, remove the screw, and remove the
paper transport motor.
H. Rear edge take-up roller
1) Remove the E-ring, the pulley, the belt, and the parallel pin.
2) Disconnect the connector, remove the screw, and remove the
take-up solenoid mounting plate unit.