Sharp MX-B401 Service Manual

SERVICE MANUAL

CODE: 00ZMXB401/S1E

DIGITAL MULTIFUNCTIONAL

SYSTEM

MODEL MX-B401

CONTENTS

NOTE FOR SERVICING

[1] PRODUCT OUTLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 [2] CONSUMABLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 [3] EXTERNAL VIEW AND INTERNAL STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . 3-1 [4] ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 [5] SIMULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 [6] SELF DIAG AND TROUBLE CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 [7] FIRMWARE UPDATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 [8] OPERATIONAL DESCRIPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 [9] MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 [10] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 [11] VARIOUS STORAGE DATA HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 [12] SERVICE WEB PAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1 [13] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1 [14] SIGNAL LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1 [15] ACTUAL WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1

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.

This document has been published to be used SHARP CORPORATION for after sales service only.

The contents are subject to change without notice.

CONTENTS

NOTE FOR SERVICING

1. Precautions for servicing . . . . . . . . . . . . . . . . . . . . . . . . . i 2. Warning for servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . i 3. Note for installing site. . . . . . . . . . . . . . . . . . . . . . . . . . . . i 4. Note for handling PWB and electronic parts . . . . . . . . . .ii 5. Note for repairing/replacing the LSU . . . . . . . . . . . . . . . iii

6.Note for handling the drum cartridge, the transfer unit, the developer cartridge,

and the fusing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

[1]PRODUCT OUTLINE

1. System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. Machine configuration . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 3. Option list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

[2]CONSUMABLE PARTS

1. Supply system table. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2. Maintenance parts list . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 3. Production number identification . . . . . . . . . . . . . . . . . 2-2 4. Life end conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 5. Life end display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 6. Environment conditions . . . . . . . . . . . . . . . . . . . . . . . . 2-4

[3]EXTERNAL VIEW AND INTERNAL STRUCTURE

1. External view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 2. Internal structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3. RSPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 4. Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 5. Operation panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 6. Sensors and detectors . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 7. Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 8. Clutches and solenoids . . . . . . . . . . . . . . . . . . . . . . . . 3-7 9. Drive motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 10. Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 11. Fans and filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 12. PWB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 13. Fuses and Thermostats . . . . . . . . . . . . . . . . . . . . . . . 3-12 14. Gates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13 15. Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

[4]ADJUSTMENTS

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 2. Adjustment item list . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 3. Details of adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

[5]SIMULATION

1. General (Including basic operations) . . . . . . . . . . . . . . 5-1 2. List of simulation codes . . . . . . . . . . . . . . . . . . . . . . . . 5-3 3. Details of simulation. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

[6]SELF DIAG AND TROUBLE CODE

1. Self diag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 2. Trouble code list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 3. Details of trouble code . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

[7]FIRMWARE UPDATE

1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 2. Update procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

[8]OPERATIONAL DESCRIPTIONS

1. Operation panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 2. Scanner section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 3. Manual paper feed section. . . . . . . . . . . . . . . . . . . . . . 8-4 4. Paper feed tray section . . . . . . . . . . . . . . . . . . . . . . . . 8-6

5. Paper transport and switchback section . . . . . . . . . . . 8-9 6. LSU section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11 7. Photo-conductor section . . . . . . . . . . . . . . . . . . . . . . 8-14 8. Toner supply section . . . . . . . . . . . . . . . . . . . . . . . . . 8-18 9. Developing section. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19 10. Transfer section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21 11. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25 12. Paper exit section. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-28

13. Process control sensor,

image registration sensor section . . . . . . . . . . . . . . . 8-29 14. Automatic document feeder . . . . . . . . . . . . . . . . . . . . 8-30 15. Electrical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32

[9]MAINTENANCE

1. Necessary work for maintenance. . . . . . . . . . . . . . . . . 9-1 2. Maintenance timing display . . . . . . . . . . . . . . . . . . . . . 9-1 3. Maintenance list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

[10] DISASSEMBLY AND ASSEMBLY

1. External view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 2. Operation panel section . . . . . . . . . . . . . . . . . . . . . . .10-4 3. Scanner section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7 4. Manual paper feed section. . . . . . . . . . . . . . . . . . . . . 10-9 5. Tray paper feed section . . . . . . . . . . . . . . . . . . . . . . 10-12 6. Paper transport, switchback section . . . . . . . . . . . . 10-15 7. LSU section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-18 8. OPC drum section . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19 9. Toner supply section . . . . . . . . . . . . . . . . . . . . . . . . 10-21 10. Developing section. . . . . . . . . . . . . . . . . . . . . . . . . . 10-22 11. Transfer section . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23 12. Fusing section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28 13. Paper exit section. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-35 14. Drive section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-37 15. PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-44 16. Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-49 17. Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-51 18. Process control sensor, registration sensor . . . . . . . 10-51 19. Document feed unit . . . . . . . . . . . . . . . . . . . . . . . . . 10-53 20. Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-56

[11] VARIOUS STORAGE DATA HANDLING
1. Necessary works when replacing the PWB
and the HDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11-1

[12] SERVICE WEB PAGE

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1 2. Details and operation procedures . . . . . . . . . . . . . . . 12-1

[13] SPECIFICATIONS

1. Basic specifications. . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

[14]SIGNAL LIST

[15]ACTUAL WIRING DIAGRAM

1. Image process (MFPC, LSU) . . . . . . . . . . . . . . . . . . . 15-1 2. Scanner, Operation section (8.5) . . . . . . . . . . . . . . . . 15-2

3. Paper feed transport, Process drive, Front,

High voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3 4. Right door, Frame fusing . . . . . . . . . . . . . . . . . . . . . . 15-4 5. Process, DV, RESI, Paper exit. . . . . . . . . . . . . . . . . . 15-5 6. Power source, Frame electrical fitting, Option . . . . . . 15-6 7. AC, Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-7

NOTE FOR SERVICING

1.Precautions for servicing

1)When servicing, disconnect the power plug, the printer cable, the network cable, and the telephone line from the machine, except when performing the communication test, etc.

It may cause an injury or an electric shock.

2)There is a high temperature area inside the machine. Use an extreme care when servicing.

It may cause a burn.

3)There is a high voltage section inside the machine which may cause an electric shock. Be careful when servicing.

4)Do not disassemble the laser unit. Do not insert a reflective material such as a screwdriver in the laser beam path.

It may damage eyes by reflection of laser beams.

5)When servicing with the machine operating, be careful not to squeeze you hands by the chain, the belt, the gear, and other driving sections.

6)Do not leave the machine with the cabinet disassembled.

Do not allow any person other than a serviceman to touch inside the machine. It may cause an electric shock, a burn, or an injury.

7)When servicing, do not breathe toner, developer, and ink excessively. Do not get them in the eyes.

If toner, developer, or ink enters your eyes, wash it away with water immediately, and consult a doctor if necessary.

8)The machine has got sharp edges inside. Be careful not to damage fingers when servicing.

9)Do not throw toner or a toner cartridge in a fire. Otherwise, toner may pop and burn you.

10)When replacing the lithium battery of the PWB, use a specified one only.

If a battery of different specification is used, it may be broken, causing breakdown or malfunction of the machine.

11)When carrying a unit with PWB or electronic parts installed to it, be sure to put it in an anti-static-electricity bag.

It may cause a breakdown or malfunctions.

CAUTION

DOUBLE POLE/NEUTRAL FUSING

(200V series only)

4)When connecting the grounding wire, never connect it to the following points.

It may cause an explosion, a fire or an electric shock.

•Gas tube

•Lightning conductor

•A water pipe or a water faucet, which is not recognized as a grounding object by the authorities.

•Grounding wire for telephone line

5)Do not damage, break, or work the power cord.

Do not put heavy objects on the power cable. Do not bend it forcibly or do not pull it extremely.

It may cause a fire or an electric shock.

6)Keep the power cable away from a heat source.

Do not insert the power plug with dust on it into a power outlet. It may cause a fire or an electric shock.

7)Do not put a receptacle with water in it or a metal piece which may drop inside the machine.

It may cause a fire or an electric shock.

8)With wet or oily hands, do not touch the power plug, do not insert the telephone line jack, do not operate the machine, or do not perform servicing.

It may cause an electric shock.

3. Note for installing site

Do not install the machine at the following sites.

1)Place of high temperature, high humidity, low temperature, low humidity, place under an extreme change in temperature and humidity.

Paper may get damp and form dews inside the machine, causing paper jam or copy dirt.

For operating and storing conditions, refer to the specifications described later.

2)Place of much vibrations

It may cause a breakdown.

2.Warning for servicing

1)Be sure to connect the power cord only to a power outlet that meets the specified voltage and current requirements.

Avoid complex wiring, which may lead to a fire or an electric shock.

It may cause a fire or an electric shock.

2)If there is any abnormality such as a smoke or an abnormal smell, interrupt the job and disconnect the power plug.

It may cause a fire or an electric shock.

3)Be sure to connect the grounding wire. If an electric leakage occurs without grounding, a fire or an electric shock may result.

To protect the machine and the power unit from lightening, grounding must be made.

3)Poorly ventilated place

An electrostatic type copier will produce ozone inside it.

The quantity of ozone produced is designed to a low level so as not to affect human bodies. However, continuous use of such a machine may produce a smell of ozone. Install the machine in a well ventilated place, and ventilate occasionally.

MX-B401 NOTE FOR SERVICING - i

4)Place of direct sunlight.

Plastic parts and ink may be deformed, discolored, or may undergo qualitative change.

It may cause a breakdown or copy dirt.

5)Place which is full of organic gases such as ammonium

The organic photo-conductor (OPC) drum used in the machine may undergo qualitative change due to organic gases such as ammonium.

Installation of this machine near a diazo-type copier may result in dirt copy.

6)Place of much dust

When dusts enter the machine, it may cause a breakdown or copy dirt.

7)Place near a wall

Some machine require intake and exhaust of air.

If intake and exhaust of air are not properly performed, copy dirt or a breakdown may be resulted.

	11-13/16"
	(30cm)
11-13/16"	17-23/32"
(30cm)	(45cm)

8)Unstable or slant surface

If the machine drops or fall down, it may cause an injury or a breakdown.

If there are optional paper desk and the copier desk specified, it is recommendable to use them.

When using the optional desk, be sure to fix the adjuster and lock the casters.

4.Note for handling PWB and electronic parts

When handling the PWB and the electronic parts, be sure to observe the following precautions in order to prevent against damage by static electricity.

1)When in transit or storing, put the parts in an anti-static bag or an anti-static case and do not touch them with bare hands.

2)When and after removing the parts from an anti-static bag (case), use an earth band as shown below:

•Put an earth band to your arm, and connect it to the machine.

•When repairing or replacing an electronic part, perform the procedure on an anti-static mat.

MX-B401 NOTE FOR SERVICING - ii

5.Note for repairing/replacing the LSU

When repairing or replacing, be sure to observe the following items.

1)When repairing or replacing the LSU, be sure to disconnect the power plug from the power outlet.

2)When repairing or replacing the LSU, follow the procedures described in this Service Manual.

3)When checking the operations after repairing the LSU, keep all the parts including the cover installed and perform the operation check.

4)Do not modify the LSU.

5)When visually checking the inside of the machine for the operation check, be careful not to allow laser beams to enter the eyes.

If the above precaution is neglected or an undesignated work is performed, safety may not be assured.

6.Note for handling the drum cartridge, the transfer unit, the developer cartridge, and the fusing unit

When handling the OPC drum unit, the transfer unit, and the developer unit, strictly observe the following items.

If these items are neglected, a trouble may be generated in the copy and print image quality.

(Drum cartridge)

1)Avoid working at a place with strong lights.

2)Do not expose the OPC drum to lights including interior lights for a long time.

3)When the OPC drum is removed from the machine, cover it with light blocking material. (When using paper, use about 10 sheets of paper to cover it.)

4)Be careful not to attach fingerprints, oil, grease, or other foreign material on the OPC drum surface.

(Transfer unit)

1)Be careful not to attach fingerprints, oil, grease, or other foreign material on the transfer belt and the transfer roller.

(Developer cartridge)

1)Be careful not to attach fingerprints, oil, grease, or other foreign material on the developer unit.

(Fusing unit)

1)Be careful not to put fingerprints, oil, grease, or other foreign material on the fusing roller and the external heating belt.

2)Do not leave the fusing roller in contact state for a long time.

MX-B401 NOTE FOR SERVICING - iii

[1] PRODUCT OUTLINE

1. System configuration

MX-BTX1

Business card feeder

MX-FN12

Finisher

MX-B401

Digital multifunctional system

MX-SCX1

Staple cartridge

						MX-CSX1
						500-sheet paper feed unit
			MX-CSX1			MX-CSX2
			500-sheet paper feed unit			500-sheet paper feed unit
MX-CSX1
			MX-CSX2			MX-CSX2
500-sheet paper feed unit			500-sheet paper feed unit			500-sheet paper feed unit

MX-FXX3	MX-SMX3	MX-FWX1	AR-PF1	MX-FR16U
Facsimile expansion kit	Expansion memory board	Internet fax expansion kit	Bar code font kit	Data security kit
				(Commercial version)

MX-AMX1		MX-AMX2	MX-AMX3			MX-USX1	MX-USX5
Application integration		Application communication	External account module			Sharpdesk 1 license kit	Sharpdesk 5 license kit
module		module

MX-US10	MX-US50			MX-USA0		MX-PUX1
Sharpdesk 10 license kit						XPS expansion kit
	Sharpdesk 50 license kit			Sharpdesk 100 license kit

MX-B401 PRODUCT OUTLINE 1 – 1

2.	Machine configuration
			MX-B401
Main body LCD			CL 8.5
RSPF			STD
Automatic duplex			STD
HDD			STD
System memory (For Program, Printer)			512MB
Local memory (Copier)			512MB
Copier			STD
GDI printer			–
SPDL/PCL printer			STD
PS printer			STD
EFI printer			–
FAX			OPT
Internet Fax			OPT *1
Network scanner			STD
Filing			STD
Security			OPT *1
OSA			Expansion enable
STD: Standard provision,		OPT: Option,	–: No setting
*1: Product key target
3.	Option list
	Model		Name		Model name	MX-B401	Product key target
Paper feed system			500-sheet paper feed unit		MX-CSX1	OPT	–
			500-sheet paper feed unit		MX-CSX2	OPT	–
			Business card feeder		MX-BTX1	OPT	–
Paper exit system			Finisher		MX-FN12	OPT	–
Electrical system (ROM)			Bar code font kit		AR-PF1	OPT	–
			Data security kit		MX-FR16U	OPT	Yes
Electrical system (Software)			Internet fax expansion kit		MX-FWX1	OPT	Yes
			XPS expansion kit		MX-PUX1	OPT *1	Yes
			Sharpdesk 1 license kit		MX-USX1	OPT	–
			Sharpdesk 5 license kit		MX-USX5	OPT	–
			Sharpdesk 10 license kit		MX-US10	OPT	–
			Sharpdesk 50 license kit		MX-US50	OPT	–
			Sharpdesk 100 license kit		MX-USA0	OPT	–
			Application integration module		MX-AMX1	OPT	Yes
			Application communication module		MX-AMX2	OPT	Yes
			External account module		MX-AMX3	OPT	Yes
			Facsimile expansion kit		MX-FXX3	OPT	–
Memory			Expansion memory board		MX-SMX3	OPT	–
STD: Standard provision,		OPT: Option,	–: No setting

*1: To install the MX-PUX1, the MX-SMX3 is required.

MX-B401 PRODUCT OUTLINE 1 – 2

[2] CONSUMABLE PARTS

1. Supply system table

A. USA/Canada/South and Central America

No.	Item	Content		Life	Model Name	Quantity in	Remarks
						collective package
1	Toner Cartridge	Toner Cartridge with IC Chip	x 1	10K *1	MX-B40NT1	10
		(Toner : Net 215g)
2	Developer Cartridge	Developer Cartridge	x 1	72K *2	MX-C40NVB	10
		(Developer : Net 185g)
3	Drum Cartridge	Drum Cartridge	x 1	72K *2	MX-C40NRB	10
		Charger Cleaner	x 1

*1: Life: A4/Letter size at Area Coverage 5% (Reference: 8K for A4/Letter 6%)

The toner life may vary depending on the document density and temperature and humidity. *2: 72K sheets or 550K rotations (For details, refer to item 4, "Life end conditions.")

The life of the above Developer Cartridge and the Drum Cartridge is 72K only when they are installed to the MX-B401.

2. Maintenance parts list

A. USA/Canada/South and Central America

No.	Item	Model name	Content	Quantity	Life	Package	Remarks
1	Heat roller kit	MX-C31HK	Upper heat roller assembly	1	120K	5
			Lower heat roller assembly	1
			External heating unit	1
			Separation pawl lower	2
			Separation pawl lower spring	2
			Upper thermistor retainer	1
			Upper thermistor	1
			Lower thermistor	1
2	Primary transfer kit	MX-B40Y1	Intermediate transfer belt F	1	120K	5
			Primary transfer roller F	1
			Cleaning blade	1
			PTC wire	1
			PTC cleaner assembly	1
			PTC cleaner B AS	1
			Primary transfer drive coupling	1
3	Primary transfer belt unit	MX-B40U1	Primary transfer belt unit	1	120K	1
4	Secondary transfer roller unit	MX-C31U2	Secondary transfer roller unit	1	60K	1
5-1	Fusing unit	MX-C31FU1	Fusing unit (Heater lamp 120V)	1	120K	1
			Ozone filter	1
5-2	Fusing unit	MX-C31FU	Fusing unit (Heater lamp 230V)	1	120K	1
			Ozone filter	1
6	Filter kit	MX-C31FL	Ozone filter	1	120K	10
7	Toner collection container	MX-B40HB	Toner collection container	2	45K for	5
			LSU cleaner	2	one *1
8	Paper feed roller kit	MX-C31RT	Paper feed roller FT	1	Replace	10	Reference: About 100K
			Take-up roller FT	1	as needed.		(Commonly used for the
			Separation roller FT	1			MX-CSX1/MX-CSX2.)
9	Manual paper feed roller kit	MX-C31MR	MF paper feed roller	1	Replace	10	Reference: About 100K
			Manual paper feed separation pad unit	1	as needed.
10	DF roller kit	MX-C31DF	Pickup_assembly	1	Replace	10	Reference: About 100K
			Pad_separation_assembly	1	as needed.
11	Staple cartridge	MX-SCX1	Staple cartridge	3	5000 times	20	Consumable part of the
					x 3		MX-FN12 (option)

*1: The life is estimated with 5% coverage. It differs depending on the use conditions of the machine.

MX-B401 CONSUMABLE PARTS 2 – 1

3. Production number identification

A. Developer cartridge

: Unit code/Model name : Color code

: Destination

: Skating

: Production place

{: Production date (YYYYMMDD) : Serial number

: Version number

B. Toner cartridge

The indications of a lot number are the same as those of the developer cartridge.

4. Life end conditions

A. Toner cartridge

After detecting near end, when the toner density is lowered to the specified level or lower and the toner sensor detects toner LOW continuously for a certain time, it is judged as toner end.

B. Developer cartridge/Drum cartridge

•When the developer (developer cartridge)/drum counter exceeds the specified number of sheets.

•When the rpm of the developer cartridge/drum cartridge exceeds the specified number.

In an actual use, in the correction operation and the warm-up operation as well as the output operation, the developer cartridge and the drum rotate idly.

If the correction operation and the warm-up operation are made frequently, idle rotations of the developer cartridge and the drum are increased accordingly.

Because of these factors, the consumption degree of the developer cartridge and the drum cartridge cannot be determined only with the print quantity. When, therefore, the number of rotations of the cartridge exceeds the specified level, it is judged as life end.

	Developer (Developer	Number of rotations
		of Developer
	cartridge)/
		(Developer cartridge)/
	Drum counter
		Drum
	Black-White	Black-White
Developer (Developer	72K	550K rotations
cartridge)/Drum

As the reference for the drum/developer (developer cartridge) life. the accumulated number of rotations can be displayed with SIM 22- 1. The value displayed with SIM 22-1 indicates the reached level in percent (%) when the developer (developer cartridge)/drum life is 100%.

Example) Life 550K, used number of rotations 385K 385/550 x 100 = 70 (%)

	80,000
quantity	70,000
	50,000
printable	60,000
	40,000
	30,000
of	20,000
Numbers	10,000
	0

Single	multi	sheets	multi	sheets	multi		sheets	multi
	2		3			4

Single multi	33,000
2 sheets multi	52,000
3 sheets multi	64,000
4 sheets multi	72,000

MX-B401 CONSUMABLE PARTS 2 – 2

5. Life end display

A. Drum cartridge

		Display condition		Print job
Display content	Sim26-38-E	Counter name	Counter value	Enable/
	set value			Disable
Change the supplies. > Drum Cartridge	0 (Print continue)	Drum cartridge print counter	When 72K is reached	Enable
		Drum cartridge accumulated rotation number	When 550K rotations is reached	Enable
The supplies will be needed soon.	1 (Print stop)	Drum cartridge print counter	When 90% of 72K is reached by the	Enable
> Drum Cartridge *1			counter
		Drum cartridge accumulated rotation number	When 90% of 550K rotation is	Enable
			reached by the counter
Change the supplies. > Drum Cartridge	1 (Print stop)	Drum cartridge print counter	When 72K is reached	Enable
			When 72K + 1K is reached	Disable
		Drum cartridge accumulated rotation number	When 550K rotations is reached	Enable
			When 550K rotation + 430Kmm is	Disable
			reached

*1: Selection of Display/Not Display can be made with Sim26-69. (Default: Not Display)

•When the drum cartridge is replaced with a new one, the print counter, the accumulated traveling distance counter, the accumulated rotation number counter, and the usage day counter are automatically cleared. If SIM26-55 setting is set to ENABLE in that case, the guidance for execution of the automatic adjustment of the engine is displayed.

•If SIM26-55 setting is set to DISABLE, SIM46-74 must be used to execute the automatic adjustment of the engine.

•If the above guidance does not disappear when the drum cartridge is replaced, SIM24-7 must be executed to clear the print counter, the accumulated traveling distance counter, the accumulated rotation number counter, and the usage day counter, and the engine automatic adjustment must be executed.

•The above display disappears when the counters are cleared.

B. Developer cartridge

		Display condition		Print job
Display content	Sim26-38-F	Counter name	Counter value	Enable/
	set value			Disable
Change the supplies.	0 (Print continue)	Developer cartridge print counter	When 72K is reached	Enable
> Developer Cartridge		Developer cartridge accumulated rotation number	When 550K rotations is reached	Enable
The supplies will be needed soon.	1 (Print stop)	Developer cartridge print counter	When 90% of 60K is reached by the	Enable
> Developer Cartridge *1			counter
		Developer cartridge accumulated rotation number	When 90% of 550K rotation is	Enable
			reached by the counter
Change the supplies.	1 (Print stop)	Developer cartridge print counter	When 72K is reached	Enable
> Developer Cartridge			When 72K + 1K is reached	Disable
		Developer cartridge accumulated rotation number	When 550K rotations is reached	Enable
			When 550K rotation + 430Kmm is	Disable
			reached

*1: Selection of Display/Not Display can be made with Sim26-69. (Default: Not Display)

•When the developer cartridge is replaced with a new one, the print counter, the accumulated traveling distance counter, the accumulated rotation number counter, and the usage day counter are automatically cleared, and the initial setting of the toner density is automatically executed.

•When SIM26-55 setting is set to ENABLE, the initial setting of the toner density is executed and the guidance for execution of the automatic adjustment of the engine is displayed.

•When SIM26-55 setting is set to DISABLE, SIM46-74 must be used to execute the automatic adjustment of the engine after completion of the initial setting of the toner density.

•If the above guidance does not disappear when the developer cartridge is replaced, the initial setting of the toner density must be executed with the simulation, and the engine automatic adjustment must be executed.

•When the initial setting of the toner density is executed, the counters are cleared and the above display disappears.

MX-B401 CONSUMABLE PARTS 2 – 3

C. Toner cartridge

		Display condition	Print job
Display content	Remaining	Status	Enable/
	quantity display *1		Disable
The supplies will be needed soon. > Toner Cartridge *2	25-0%	Toner remaining quantity is 25% or less.	Enable
	25-0%	Toner remaining quantity corresponds to output of XX sheets. *3	Enable
Change the supplies. > Toner Cartridge	0%	When the toner cartridge reaches toner end.	Disable
No display	50-25%	Toner remaining quantity is 49 - 25%.	Enable
No display	75-50%	Toner remaining quantity is 74 - 50%.	Enable
No display	100-75%	Toner remaining quantity is 100 -75%.	Enable
Install the toner cartridge.	No display	When no toner cartridges are installed.	Disable
Improper cartridge.	No display	When an incompatible toner cartridge is installed.	Disable
Cartridge error.	No display	CRUM trouble	Disable
		Toner cartridge connector contact trouble

*1: Detected by the toner motor rotation number and the pixel count (The value of larger life percentage is employed.) *2: Selection of Display/Not Display can be made with Sim26-69. (Default: Not Display)

*3: Setting can be made with Sim26-69. (Default: 0 sheet)

6. Environment conditions

A. Operating environment conditions

Temperature: 10 - 35°C

Humidity: 20 - 85% RH

Atmospheric pressure: 590 - 1013hPa (Altitude: 0 - 2000m)

Humidity (RH)

85%

60%

20%

Temperature

B.Transit environment conditions (term: 2 weeks)

-20 - 45°C (Free from dew)

C. Storage environment conditions (unopened)

-10 - 40°C (Free from dew)

D. Disposal standard

Toner cartridge/developer cartridge: 24 months (unopened) from the production month.

Drum cartridge: 36 months from the production month

MX-B401 CONSUMABLE PARTS 2 – 4

[3] EXTERNAL VIEW AND INTERNAL STRUCTURE

1. External view

1
2
3
4	12
5
	13
6
7
8	11
9	14

10 11

No.	Name	Function/Operation
1	Auto document feeder	Feeds the set documents automatically, and scans them continuously. The duplex surfaces are scanned.
2	Operation panel	Used to enter an input of various settings or the copy quantity.
3	Paper exit tray (Center tray)	Copied or printed paper is discharged to this tray.
4	Finisher *1	Delivers stapled paper, and allows offset discharge of paper.
5	Front cover	This is opened when replacing toner cartridges or the waste toner box.
6	Tray 1	Stores paper. Max. 500 sheets (80g/m2, 21lbs)
7	Tray 2 (with the MX-CSX1 installed) *1	Stores paper. Max. 500 sheets (80g/m2, 21lbs)
8	Tray 3 (with the MX-CSX2 installed) *1	Stores paper. Max. 500 sheets (80g/m2, 21lbs)
9	Tray 4 (with the MX-CSX2 installed) *1	Stores paper. Max. 500 sheets (80g/m2, 21lbs)
10	Main power switch	Turns on the power of the machine. When FAX or Internet FAX is used, keep it ON.
11	Handle	Use this handle to lift the main unit for transit.
12	Right side cover release lever	To remove paper jam, lift this lever and open the right side cover.
13	Manual paper feed tray	For manual paper feed, paper is inserted from this tray. When A4R or 8-1/2" x 11"R paper is set, extend the
		auxiliary tray.
14	One-stage paper feed unit side cover	To remove paper jam in tray 2, 3, or 4, open this cover.
	(with the MX-CSX1/2 installed)

*1: Option

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 1

2. Internal structure

1

6

7

8

4

2

	11
5	11
	3

910

No.	Name	Function/Operation	Note
1	Toner cartridge	When toner is exhausted in a cartridge, remove the cartridge and replace it
		with a new one.
2	Drum cartridge	This cartridge stores a drum. When the specified life is reached, replace it
		with a new cartridge.
3	Developer cartridge	This cartridge stores developer. When the specified life is reached, replace it
		with a new cartridge.
4	MC cleaning rod insertion port	When the copy quality is degraded by dirt on the MC unit, the rod to clean the
		MC unit is inserted into this port.
5	LSU cleaning rod insertion port	When the copy quality is degraded by dirt on the LSU, the rod to clean the
		LSU is inserted into this port.
6	Fusing section	Fuses images transferred on paper by heat.	Note: The fusing section is heated
			to a high temperature. Be careful
			not to burn when paper jam.
7	Transfer belt	The transfer belt transfers toner on the drum.	Do not touch or scratch. It may
			cause degraded images.
8	Right side cover	Opened when a paper jam is generated.
9	Waste toner box	Receives waste toner when copying or printing.	The waste toner box is collected
			by the servicemen.
10	Waste toner box release lever	When the waste toner box is removed, this lever is rotated to release lock.
11	Drum positioning plate unit release	Releases lock of the drum positioning plate unit. When a drum cartridge or a
	lever	developer cartridge is replaced, rotate this lever to open the drum positioning
		plate unit.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 2

3. RSPF

6 7

1		2		3		4		5

No.	Name	Function/ Operation
1	Document feed roller	Transports a document automatically.
2	Document feed section cover	This cover is opened when removing a paper jam or cleaning the document feed roller.
3	Document guide	Guides to scan a document properly. Set to the set document size.
4	Document set table	A document is set on this table. In the case of a single-surface document, set it face up.
5	Document exit section	The scanned document is discharged to this section.
6	Document scan section	The document set on the document set table is scanned in this section.
7	Document table (Glass surface)	Used for thick documents or book documents which cannot be entered to the auto document feeder.

4. Connectors

6

1
2	5
3
4

No.	Name	Function/ Operation
1	USB connector (Type A)	Used to connect a USB hub or USB memory. This connector cannot be used when shipping from the factory.
2	LAN connector	Used to connect a LAN cable to use this machine in a network.
3	USB connector (Type B)	Used to connect a computer to use this machine as a printer.
4	Connector	This connector is used by the serviceman.
5	Inner finisher connection connector	This connector is used to connect the inner finisher and the main unit when the inner finisher (option) is installed.
6	USB connector (Type A)	Used to connect a USB hub or USB memory.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 3

5. Operation panel

1

2

3

4

5

6

9

JOB STATUS

SYSTEM

SETTINGS

READY

PRINT DATA

	IMAGE SEND	LINE
		DATA	LOGOUT
		HOME

		7	8 10	11	12	13	14	15 16
No.	Name			Function/Operation
1	Touch panel	Messages and keys appear in the touch panel display.
		Touch the displayed keys to perform a variety of operations.
		When a key is touched, a beep sounds and the selected item is highlighted. This provides confirmation as you
		perform an operation.
2	[SYSTEM SETTINGS] key	Press this key to display the system settings menu screen. The system settings are used to configure paper tray
		settings, store addresses for transmission operations, and adjust parameters to make the machine easier to use.
3	[JOB STATUS] key	Press this key to display the job status screen. The job status screen is used to check information on jobs and to
		cancel jobs.
4	PRINT mode indicators	• READY indicator
		Print jobs can be received when this indicator is lit.

•DATA indicator

This blinks while print data is being received and lights steadily while printing is taking place.

5	Numeric keys				These are used to enter the number of copies, fax numbers, and other numerical values. These keys are also used
					to enter numeric value settings (except for the system settings).
6	[CLEAR] key (		)		Press this key to return the number of copies to "0".
7	[HOME] key				Touch this key to display the home screen. Frequently used settings can be registered in the home screen to
					enable quick and easy operation of the machine.
8	IMAGE SEND mode indicators				•	LINE indicator
						This lights up during transmission or reception of a fax or Internet fax. This also lights during transmission of an
						image in scan mode.
					•	DATA indicator
						This blinks when a received fax or Internet fax cannot be printed because of a problem such as out of paper.
						This lights up when there is a transmission job that has not been sent.
9	[START] key				Press this key to copy or scan an original. This key is also used to send a fax in fax mode.
10	[LOGOUT] key (		)		Press this key to log out after you have logged in and used the machine. When using the fax function, this key can
					also be pressed to send tone signals on a pulse dial line.
11	[#/P] key (	)			When using the copy function, press this key to use a job program. When using the fax function, this key can be
					used when dialing.
12	[CLEAR ALL] key (			)	Press this key to return to the initial operation state.
					Use this key when you wish to cancel all settings that have been selected and start operation from the initial state.
13	[STOP] key (	)			Press this key to stop a copy job or scanning of an original.
14	[POWER SAVE] key (			) / indicator	Use this key to put the machine into auto power shut-off mode to save energy.
					The [POWER SAVE] key ( ) blinks when the machine is in auto power shut-off mode.
15	[POWER] key (		)		Use this key to turn the machine power on and off.
16	Main power indicator				This lights up when the machine's main power switch is in the "on" position.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 4

6. Sensors and detectors

	SCOV
SPPD1	SPED
SOCD	SPPD2

MHPS	TFD2

POD2

POD1

			RTH_EX1			APPD1
		RTH_EX2			HLPCD
					RTH_Sub
		1TUD_K		RTH_Main		RTH_Low
	1TUD_CL			REGS_R
		TCS_K	PPD2		APPD2
							MPLD1
				PPD1		MPWS
						MPED
				CPED1 CPFD1
				CLUD1
					TH/HUD
		CSPD1
Signal name	Name	Type			Function/Operation		Note
1TUD_CL	Transfer belt separation detector CL	Transmission type	Detects separation of the transfer belt.				High voltage PWB
							holder unit
1TUD_K	Transfer belt separation detector BK	Transmission type	Detects initialization of the primary transfer unit.				Frame unit
APPD1	ADU transport path detector 1	Transmission type	Detects paper pass in the upper stream of the				Right door unit
			switchback section.
APPD2	ADU transport path detector 2	Transmission type	Detects paper pass in the middle stream of the				Right door unit
			switchback section.
CLUD1	Tray 1 upper limit detector	Transmission type	Detects that the top surface of the paper stored in the				Paper feed unit
			tray 1 is lifted to the top.
CPED1	Tray 1 paper empty detector	Transmission type	Detects that paper is stored in the tray 1.				Paper feed unit
CPFD1	Paper transport detector 1	Reflection type	Detects paper when passes the transport roller 1.				Paper feed unit
CSPD1	Tray 1 paper remaining quantity	Transmission type	Detects the paper remaining quantity in the tray 1.				Lift-up unit
	detector
HLPCD	Fusing roller pressure release detector	Transmission type	Detects separation of the upper and the lower heat				Fusing unit
			rollers.
MHPS	Scanner home position detector	Transmission type	Detects the scanner home position.				Scanner unit
MPED	Manual feed paper empty detector	Transmission type	Detects paper empty in the manual paper feed tray.				Manual paper feed unit
MPLD1	Manual feed paper length detector 1	Transmission type	Detects the length of paper in the manual paper feed				Manual paper feed unit
			tray.
MPWS	Manual paper feed tray paper width	Volume resistor	Detects the width of the paper guide in the manual				Manual paper feed unit
	sensor		paper feed tray.
POD1	Fusing rear detector	Transmission type	Detects paper exit from the fusing section.				Frame fusing unit
POD2	Paper exit detector	Transmission type	Detects paper which is discharged.				Paper exit lower PG unit
PPD1	Paper transport detector 2	Transmission type	Detects paper when passes the transport roller 2.				Paper feed unit
PPD2	Paper transport detector 3	Reflection type	Detects paper in front of the registration roller.				Frame unit
REGS_R	Registration sensor	Reflection type	Detects the toner patch density. Detects open/close of				Registration unit
			the reference reflection plate, the secondary transfer
			roller transfer position, and the non-transfer position.
RTH_EX1	External heat roller contact thermistor 1	Thermistor	Detects the temperature of the external heat roller.				Fusing unit
RTH_EX2	External heat roller contact thermistor 2	Thermistor
RTH_Low	Lower heat roller contact thermistor	Thermistor	Detects the temperature of the lower heat roller.				Fusing unit
RTH_Main	Upper heat roller non-contact	Non-contact	Detects the temperature of the upper heat roller.				Fusing unit
	thermistor	thermistor
RTH_Sub	Upper heat roller contact thermistor	Thermistor

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 5

Signal name	Name	Type	Function/Operation	Note
SCOV	RSPF cover open/close detector	Transmission type	Detects open/close of the RSPF cover.	RSPF unit
SOCD	RSPF open/close detector	Transmission type	Detects open/close of the RSPF unit itself.	RSPF unit
SPED	RSPF document empty detector	Transmission type	Detects that a document is in the document tray.	RSPF unit
SPPD1	RSPF transport detector 1	Transmission type	Detects a document which passes the paper path.	RSPF unit
SPPD2	RSPF transport detector 2	Transmission type	Detects a document which passes the paper path.	RSPF unit
TCS_K	Toner density sensor	Magnetic sensor	Detects the toner density in the developing cartridge.	Developing cartridge
TFD2	Paper exit tray full detector	Transmission type	Detects the full state of the paper exit tray.	Paper exit upper PG unit
TH/HUD	Temperature humidity sensor	Temperature	Detects the temperature and the humidity around the	Right door unit
		humidity sensor	machine.

7. Switches

DSW-R

PWRSW

DSW-F

DRCRU_K

1TNFD

MSW

Signal name	Name	Type	Function/Operation
1TNFD	Waste toner full detection switch	Micro switch	Detects the waste toner full.
DRCRU_K	OPC drum initial (new OPC drum) detector (BK)	Micro switch	Detects the OPC drum initial state (new OPC drum).
DSW-F	Front door open/close switch	Micro switch	Detects open/close of the front door, and turns ON/OFF the power line of
			the fusing, the motor and the LSU laser.
DSW-R	Right door open/close switch	Micro switch	Detects open/close of the right door unit, and turns ON/OFF the power
			line of the fusing, the motor and the LSU laser.
MSW	Main switch	Seesaw switch	Turns ON/OFF the main DC power source.
PWRSW	Operation panel power switch	Push switch	Outputs the ON/OFF control signal of the DC power source.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 6

8. Clutches and solenoids

SPUS

ADUC1

HLPCC

1TURC_1

2TURC

MPFS

CPUC1

CPFC

Signal name	Name	Type	Function/Operation
1TURC_1	Primary transfer separation clutch 1	Electromagnetic clutch	Controls the primary transfer separation mode.
2TURC	Secondary transfer separation clutch	Electromagnetic clutch	Controls open/close of the resist sensor cover.
ADUC1	ADU transport clutch 1	Electromagnetic clutch	Controls ON/OFF of the roller in the switchback section.
CPFC	Tray vertical transport clutch	Electromagnetic clutch	Controls ON/OFF of the paper transport roller in the tray paper feed section.
CPUC1	Paper feed clutch (Tray paper feed)	Electromagnetic clutch	Controls ON/OFF of the roller in the tray paper feed section.
HLPCS	Fusing pressure release solenoid	Electromagnetic solenoid	Controls the pressure applied to the upper and the lower heat rollers in the
			fusing section.
MPFS	Paper pickup solenoid	Electromagnetic solenoid	Controls ON/OFF of the pick-up operation of the paper feed roller in the
	(Manual paper feed)		manual paper feed section.
SPUS	RSPF paper feed roller solenoid	Electromagnetic solenoid	Controls ON/OFF of the paper feed roller in the RSPF paper feed section.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 7

9. Drive motors

SPFM

MIM

POM

TNM_K

FUM

PGM1

DVM_K

RRM

CPFM

CLUM

Signal name	Name	Type	Function/Operation
CLUM	Paper tray lift-up motor	DC brush-less motor	Drives the lift plate of the paper feed tray.
	(Paper feed tray 1)
CPFM	Paper feed motor	Stepping motor	Drives the paper feed section.
DVM_K	Developing drive motor	Brush-less motor	Drives the development cartridge, the drum cartridge, the primary transfer
			unit, and the secondary transfer unit.
			Also separates the primary transfer unit.
FUM	Fusing drive motor	DC brush motor	Drives the fusing unit.
MIM	Scanner motor	Stepping motor	Drives the carriage unit.
PGM1	Polygon motor 1	DC brush-less motor	Scans the laser beam.
POM	Paper exit drive motor	Stepping motor	Drives the paper exit roller.
RRM	Registration motor	Stepping motor	Drives the resist roller and controls ON/OFF.
SPFM	RSPF transport motor	Stepping motor	Drives the RSPF unit.
TNM_K	Toner motor K	Synchronous motor	Transports toner from the toner cartridge to the developing unit.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 8

10. Lamps

CLI

CCFT

HL_EX1

DL_K

HL_EX2

HL_Main

HL_Sub

Signal name	Name	Type	Function/Operation
CCFT	LCD back-light	CCFT cool cathode ray tube	Back-light for the LCD
CLI	Scanner lamp	CCFL (Cold cathode fluorescent lamp)	Radiates lights onto a document for the CCD to scan document images.
DL_K	Discharge lamp K	LED	Discharges electric charges on the OPC drum.
HL_EX	External heater lamp 1	Halogen lamp	Heats the upper heat roller through an external heat roller.
HL_EX2	External heater lamp 2	Halogen lamp	Heats the upper heat roller through an external heat roller.
HL_Main	Upper heater lamp	Halogen lamp	Heats the upper heat roller. (Main)
HL_Sub	Lower heater lamp	Halogen lamp	Heats the lower heat roller. (Main)

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 9

11. Fans and filter

PROFM1

POFM

FUFM

HDDFAN

	PROFM2
LSUFM	PSFM

		1
Signal name	Name	Function/Operation
FUFM	Fusing cooling fan motor	Cools the fusing unit.
HDDFM	HDD cooling fan motor	Cools the HDD.
LSUFM	LSU cooling fan motor	Cools the LSU.
POFM	Paper exit cooling fan motor	Cools the paper exit section.
PROFM1	Process fan motor 1	Cools the process section.
PROFM2	Process fan motor 2	Exhausts ozone.
PSFM	Power PWB cooling fan motor	Cools the power PWB.
No.	Name	Function/Operation
1 Ozone filter		Absorbs ozone generated in the image process section.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 10

12. PWB

		4
		5
1	2	3
		6
		7

8

18

17

16

9

10

15	11

14

12

13

No.	Name	Function/Operation
1	MFP OPE-P PWB	Outputs the key operation signal.
2	LCD INV PWB	Generates the high voltage for the LCD back-light.
3	LVDS PWB	Converts the display signal and outputs to the LCD.
4	CL inverter PWB	Drives the scanner lamp.
5	CCD PWB	Scans the document images.
6	RSPF driver PWB	Controls the RSPF.
7	Scanner control PWB	Controls the scanner section.
8	PCU PWB	Controls the engine section.
9	MFPC PWB	Controls images and the whole machine.
10	LD PWB	Controls laser lighting.
11	BD PWB	Detects laser and outputs the synchronous signal.
12	ACDC power PWB	Controls the primary side power source and outputs the secondary side voltage.
13	Paper size detection PWB	Detects the paper size in the tray 1.
14	MC PWB	Generates the high voltage for the main charger and the developing bias voltage.
15	DV initial PWB	Detects the DV model.
16	LSU MOTHER PWB	Controls the LSU. Interfaces the MFPC PWB and PCU PWB.
17	HL PWB	Controls the heater lamp.
18	TC PWB	Generates each transfer voltage and separation voltage.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 11

13. Fuses and Thermostats

RDTCT_EX2

RDTCT_EX1

RDTCT_Main

RDTCT_Low

		F401	F405
			F404
		F402
			F403
			F201	F301
			F101	F002
			F004	F001
			F003
Signal name	Name		Specifications		Section
F001	Fuse	AC250V T10AH (200V series)			ACDC power PWB
		AC250V 20A (120V series)
F002	Fuse	AC250V T10AH (200V series) (Not provided in 120V series)			ACDC power PWB
F003	Fuse	AC250V T2AH (Common in 200V series and 120V series)			ACDC power PWB
F004	Fuse	AC250V T2AH (200V series) (Not provided in 120V series)			ACDC power PWB
F101	Fuse	AC250V T2AH (Common in 200V series and 120V series)			ACDC power PWB
F201	Fuse	AC250V T5AH (Common in 200V series and 120V series)			ACDC power PWB
F301	Fuse	AC250V T2AH (Common in 200V series and 120V series)			ACDC power PWB
F401	Fuse	AC250V T4AH (Common in 200V series and 120V series)			ACDC power PWB
F402	Fuse	AC250V T6.3AH (Common in 200V series and 120V series)			ACDC power PWB
F403	Fuse	AC250V T6.3AH (Common in 200V series and 120V series)			ACDC power PWB
F404	Fuse	AC250V T6.3AH (Common in 200V series and 120V series)			ACDC power PWB
F405	Fuse	AC250V T6.3AH (Common in 200V series and 120V series)			ACDC power PWB
RDTCT_EX1	External thermostat	Prevents against overheating of the fusing roller.			Fusing unit
RDTCT_EX2	External thermostat 2	Prevents against overheating of the fusing roller.			Fusing unit
RDTCT_Low	Lower thermostat	Prevents against overheating of the fusing roller.			Fusing unit
RDTCT_Main	Upper thermostat	Prevents against overheating of the fusing roller.			Fusing unit

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 12

14. Gates

1

2

No.	Name	Function/ Operation
1	Switchback gate	Guides paper which is switched back by the paper exit roller to the switchback section in the duplex copy mode.
2	RSPF reverse gate	Guides paper which is switched back by the paper exit roller to the transport roller 4 when duplex scanning of a
		document is performed.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 13

15. Rollers

4

5

6 7

8

9

10 11

3

2

1 12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

No.	Name	Function/ Operation
1	Transport roller 3 (Idle) (RSPF)	Applies a pressure to the document and the transport roller to give a transport power of the transport roller
		to the document.
2	Transport roller 3 (Drive) (RSPF)	Transports the document from the transport roller 2 to the paper exit roller.
		Transports the document switched back by the paper exit roller to the transport roller 2 in the duplex
		scanning mode.
3	Transport roller 4 (Idle) (RSPF)	Applies a pressure to the document and the transport roller to give a transport power of the transport roller
		to the document.
4	Transport roller 2 (Idle) (RSPF)	Applies a pressure to the document and the transport roller to give a transport power of the transport roller
		to the document.
5	Transport roller 2 (Drive) (RSPF)	Transports the document from the transport roller 1 to the transport roller 3.
6	Transport roller 1 (Drive) (RSPF)	Transports the document fed from the document tray to the transport roller 2.
7	Transport roller 1 (Idle) (RSPF)	Applies a pressure to the document and the transport roller to give a transport power of the transport roller
		to the document.
8	Paper feed roller (RSPF)	Feeds the document to the transport section.
9	Paper pickup roller (RSPF)	Transports the document to the separation roller.
10	Paper exit roller (Idle) (RSPF)	Applies a pressure to the document and the transport roller to give a transport power of the transport roller
		to the document.
11	Paper exit roller (Drive) (RSPF)	Discharges the document. Transports the document to the transport roller 2 in the duplex scanning mode.
12	Paper exit roller (Drive)	Discharges the paper. / Transports the paper to the switchback section.
13	Paper exit roller (Idle)	Applies a pressure to the paper and the paper exit roller to give a transport power of the paper exit roller to
		the paper.
14	Transport roller 4 (Idle)	Applies a pressure to the paper and the transport roller to give a transport power of the transport roller to
		the paper.
15	Transport roller 4 (Drive)	Transports the paper switched back by the paper exit roller to the transport roller 5.
16	Transport roller 3 (Drive)	Transports the paper from the fusing roller to the paper exit roller.
17	Transport roller 3 (Idle)	Applies a pressure to the paper and the transport roller to give a transport power of the transport roller to
		the paper.
18	Fusing roller (Heating)	Heats and presses toner on the paper to fuse on the paper.
19	Fusing roller (Pressing)	Applies a pressure to the fusing roller (heating).
20	Transport roller 5 (Drive)	Transports the paper from the transport roller 4 to the transport roller 2.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 14

No.	Name	Function/ Operation
21	Transport roller 5 (Idle)	Applies a pressure to the paper and the transport roller to give a transport power of the transport roller to
		the paper.
22	Resist roller (Idle)	Applies a pressure to the paper and the resist roller, giving a transport power of the resist roller to the
		paper.
23	Resist roller (Drive)	Transports paper to the transfer section. / Controls the paper transport timing, and adjusts the relative
		relations between images and paper.
24	Transport roller 2 (Idle)	Applies a pressure to the paper and the transport roller to give a transport power of the transport roller to
		the paper.
25	Paper feed roller (Manual paper feed tray)	Transports paper to the transport roller 2.
26	Transport roller 2 (Drive)	Transports the paper transported from the transport roller 1 to the resist roller.
27	Transport roller 1 (Drive)	Transports paper which was fed from the paper feed tray 1 to the transport roller 2.
28	Transport roller 1 (Idle)	Applies a pressure to the paper and the transport roller to give a transport power of the transport roller to
		the paper.
29	Paper feed roller (No. 1 paper feed tray)	Transport paper to the paper transport section.
30	Separation roller (No. 1 paper feed tray)	Separates paper to prevent against double feed.
31	Paper pickup roller (No. 1 paper feed tray)	Transports paper to the paper feed roller.

MX-B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 15

[4] ADJUSTMENTS

1. General

Each adjustment item in the adjustment item list is associated with a specific Job number. Perform the adjustment procedures in the sequence of Job numbers from the smallest to the greatest.

However, there is no need to perform all the adjustment items. Perform only the necessary adjustments according to the need.

Unnecessary adjustments can be omitted. Even in this case, however, the sequence from the smallest to the greatest Job number must be observed.

If the above precaution should be neglected, the adjustment would not complete normally or trouble may occur.

2. Adjustment item list

Job No					Adjustment item list	Simulation
ADJ 1	Adjusting high voltage values			1A	Adjust the main charger grid voltage	8-2
				1B	Adjust the developing bias voltage	8-1
				1C	Transfer voltage adjustment	8-6
ADJ 2	Image density sensor adjustment					44-2
ADJ 3	Image skew adjustment (LSU unit)					64-2
ADJ 4	Print engine image magnification ratio adjustment (Main scanning direction) (Print engine section) (Manual adjustment)					50-10
ADJ 5	Image off-center adjustment (Print engine section)					50-10
ADJ 6	Scan image magnification ratio			6A	Scan image magnification ratio adjustment (Main scanning direction) (Document table mode)	48-1
	adjustment (Document table			6B	Scan image magnification ratio adjustment (Sub scanning direction) (Document table mode)	48-1
	mode)
ADJ 7	Scan image magnification ratio			7A	Scan image magnification ratio adjustment (Main scanning direction) (RSPF mode)	48-1
	adjustment (Main/sub scanning			7B	Scan image magnification ratio adjustment (Sub scanning direction) (RSPF mode)	48-1
	direction) (RSPF mode)
ADJ 8	Scan image off-center			8A	Scan image off-center adjustment (Document table mode)	50-12
	adjustment			8B	Scan image off-center adjustment (RSPF mode)	50-12
ADJ 9	Print area (Void area) adjustment (Print engine section)					50-10/50-1
ADJ 10	Copy image position, image loss			10A	Copy image position, image loss adjustment (Document table mode)	50-1 (50-2)
	adjustment			10B	Adjust the original scan start position (Adjust the scanner read position in RSPF mode front	53-8
					face scan)
				10C	Copy image position, image loss adjustment (RSPF mode)	50-6 (50-7)
ADJ 11	Print lead edge image position adjustment (Printer mode) (Print engine section)					50-5
ADJ 12	Copy density and gradation			12A	CCD gamma adjustment (CCD calibration)	63-3 (63-5)
	adjustment			12B	Copy density and gradation adjustment (Auto adjustment)	46-24
				12C	Copy density and gradation adjustment (Manual adjustment)	46-21
				12D	Copy density and gradation adjustment (Each copy mode) (Whole adjustment)	46-2
					(Normally unnecessary to adjust)
				12E	Condition setting of document density reading operation (exposure) in the auto copy mode	46-19
					(Normally not required)
				12F	Document background density reproducibility adjustment in the auto copy mode (Normally	46-32
					unnecessary to adjust)
				12G	Color document reproducibility adjustment in the copy mode	46-37
					(Normally unnecessary to adjust)
				12H	Sharpness adjustment in the auto copy mode (Normally unnecessary to adjust)	46-60
				12I	Copy high density part density correction setting (Prevents against tone gap)	46-23
					(Normally unnecessary to adjust)
				12J	Copy density and gradation adjustment in the RSPF mode (Normally unnecessary to adjust)	46-9
				12K	Auto copy density and gradation adjustment by the user	46-53
					(Copy auto adjustment enable setting and adjustment)
ADJ 13	Printer density and gradation			13A	Printer density and gradation adjustment (Auto adjustment)	67-24
	adjustment			13B	Printer density and gradation adjustment (Manual adjustment)	67-25
				13C	Printer density and gradation adjustment (low density part density and gradation adjustment)	67-36
					(Normally unnecessary to adjust)
				13D	Printer high density part density correction setting	67-34
					(High density part tone gap countermeasure) (Normally unnecessary to the setting change)
				13E	Auto density and gradation adjustment by the user (Printer auto adjustment ENABLE setting	26-54
					and adjustment)
				13F	Copy/Printer density and gradation adjustment (Automatic adjustment)	46-74
ADJ 14	Manual paper feed tray paper size (width) sensor adjustment					40-2
ADJ 15	Touch panel coordinate setting					65-1
ADJ 16	Image loss, void area, image off-			16A	Print image main scanning direction image magnification ratio automatic adjustment	50-28
	center, image magnification ratio			16B	Image off-center automatic adjustment (Document table mode)	50-28
	auto adjustment with SIM50-28			16C	Copy lead edge image reference position adjustment, image off-center, sub scanning	50-28
					direction image magnification ratio automatic adjustment (Document table mode)
				16D	SPF mode image off-center, image lead edge position, sub scanning direction image	50-28
					magnification ratio automatic adjustment (RSPF mode)
ADJ 17	Fusing paper guide position adjustment

MX-B401 ADJUSTMENTS 4 – 1

3. Details of adjustment

ADJ 1 Adjusting high voltage values

1-B Adjust the developing bias voltage

This adjustment is needed in the following situations:

*When the MC high voltage power PWB is replaced.

*U2 trouble has occurred.

1-A Adjust the main charger grid voltage

This adjustment is needed in the following situations:

*The PCU PWB has been replaced.

*The EEPROM of the PCU PWB has been replaced.

* When the MC high voltage power PWB is replaced.

1) Go through the modes specified in Simulation 8-1.

*U2 trouble has occurred.

*The PCU PWB has been replaced.

*The EEPROM of the PCU PWB has been replaced.

1)Enter the SIM 8-2 mode.

		6,08/$7,21	12			&/26(
7(67
0+9 *5,' 6(77,1* $1' 287387
						0,''/( 63((' *%B.
				$

0,''/(	/2:		(;(&87(	2.

2)Select an output mode and an item to be adjusted.

3)Enter the adjustment value (specified value) in the middle speed mode, and press [OK] key.

When [EXECUTE] key is pressed, the voltage entered in the procedure 3 is outputted for 30sec and the set value is saved. When [EXECUTE] key is pressed, the output is stopped.

Enter the adjustment value of each mode which is specified on the label attached on the MC high voltage power PWB.

NOTE: Note that the adjustment value may differ depending on the MC high voltage power PWB.

Since the adjustment value label is attached on the MC high voltage PWB, the PWB must be removed in order to check the adjustment value.

This is a troublesome procedure. Therefore, it is advisable to put down the adjustment value in advance.

Mode		Item/Display	Content	Setting range
MIDDLE	A	MIDDLE	K charging/grid bias set	150 - 850
		SPEED GB_K	value at middle speed
LOW	A	LOW SPEED	K charging/grid bias set	150 - 850
		GB_K	value at low speed

GBK:XXX

When the adjustment value (specified value) of the middle speed mode is set, the adjustment values of the other modes are automatically set according to the middle speed mode setting in a certain relationship.

NOTE: Since the high voltage output cannot be checked with a digital multi meter in this model, a judgment of the output must be made by checking the print image quality.

		6,08/$7,21	12	&/26(
	7(67
'9 6(77,1* $1' 287387

$ 0,''/( 63((' '9%B.

0,''/(	/2:		(;(&87(	2.

2)Select an output mode and an item to be adjusted.

3)Enter the adjustment value (specified value) in the middle speed mode, and press [OK] key.

When [EXECUTE] key is pressed, the voltage entered in the procedure 3 is outputted for 30sec and the set value is saved. When [EXECUTE] key is pressed, the output is stopped.

Enter the adjustment value of each mode which is specified on the label attached on the MC high voltage power PWB.

NOTE: Note that the adjustment value may differ depending on the MC high voltage power PWB.

Since the adjustment value label is attached on the MC high voltage PWB, the PWB must be removed in order to check the adjustment value.

This is a troublesome procedure. Therefore, it is advisable to put down the adjustment value in advance.

Mode		Item/Display	Content	Setting
				range
MIDDLE	A	MIDDLE SPEED	K developing bias set	0-600
		DVB_K	value at middle speed
LOW	A	LOW SPEED	K developing bias set	0-600
		DVB_K	value at low speed

DVK:XXX

When the adjustment value (specified value) of the middle speed mode is set, the adjustment values of the other modes are automatically set according to the middle speed mode setting in a certain relationship.

NOTE: Since the high voltage output cannot be checked with a digital multi meter in this model, a judgment of the output must be made by checking the print image quality.

MX-B401 ADJUSTMENTS 4 – 2

1-C Transfer voltage adjustment

This adjustment is needed in the following situations:

*When the TC high voltage PWB is replaced.

*U2 trouble has occurred.

*The PCU PWB has been replaced.

*The EEPROM of the PCU PWB has been replaced.

1)Go through the modes specified in Simulation 8-6.

		6,08/$7,21		12					&/26(
7(67
7+9 6(77,1* $1' 287387
					$			7& /2: 63((' %: .
$
					%			7& 0,''/( 63((' %: .
					&			7& 3/$,1 %: 63;
								7& 3/$,1 %: '3;
					'
								7& +($9< %: 63;
					(
					)			7& +($9< %: '3;
					*			7& 2+3 %:
								7& (19(/23( %:
					+
					,			7& 7+,1 %:
					-			7& */266< %:
					.			7& &/($1,1*
					/			7& &/($1 /2: 63'
								(;(&87(	2.

					2) Select an item to be adjusted.
					Enter the adjustment value (specified value), and press [OK]
					key.
					When [EXECUTE] key is pressed, the voltage entered in the
					procedure 3 is outputted for 30sec and the set value is saved.
					When [EXECUTE] key is pressed, the output is stopped.
					By setting the default value (specified value), the specified out-
					put is provided.
						Adjustment	Default	Actual output	Default value
	Item/Display		Content						of actual
						range	value	setting range
									output value
A	TC1 LOW SPEED BW K	Primary transfer bias	Low speed mode			51 - 255	95	2 - 30 A	8 A
B	TC1 MIDDLE SPEED BW K	reference value	Middle speed mode			51 - 255	131		13		A
								2 - 30 A
C	TC2 PLAIN BW SPX	Secondary transfer	Standard		Front surface mode	51 - 255	111	–2 - –80 A	–25 A
D	TC2 PLAIN BW DPX	bias reference value	paper mode		Back surface mode	51 - 255	111	–2 - –80 A	–25 A
E	TC2 HEAVY BW SPX		Heavy paper		Front surface mode	51 - 255	93	–2 - –80 A	–10 A
F	TC2 HEAVY BW DPX		mode		Back surface mode	51 - 255	93	–2 - –80 A	–10 A
G	TC2 OHP BW				OHP	51 - 255	85	–2 - –80 A	–8 A
H	TC2 ENVELOPE BW			Envelope		51 - 255	124	–2 - –80 A	–30 A
I	TC2 THIN BW			Thin paper		51 - 255	111	–2 - –80 A	–25 A
J	TC2 GLOSSY BW		Gloss paper			51 - 255	72	–2 - –80 A	–10 A
K	TC2 CLEANING		Cleaning mode			51 - 255	67	–2 - -80 A	–8 A
L	TC2 CLEAN LOW SPD	Secondary transfer	Low speed print mode			0 - 255	16	–100V - 1500V	0V
M	TC2 CLEAN MIDDLE SPD	cleaning bias	Middle speed print mode			0 - 255	16	–100V - 1500V	0V
N	TC2 CLEAN CLEANING	reference value	Cleaning mode			0 - 255	143	–100V - 1500V	800V
O	PTC LOW SPEED BW	PTC current output	Low speed mode			0 - 255	133	0 A - –700 A	–300 A
P	PTC MIDDLE SPEED BW	reference value	Middle speed mode			0 - 255	133	0 A - –700 A	–300 A
Q	CASE VOLT LOW BW	PTC case voltage	Low speed mode			0 - 255	0	0V - –1000V	0V
R	CASE VOLT MID BW	reference value	Middle speed mode			0 - 255	0	0V - –1000V	0V
S	PEEL VOLT LOW BW	Separation discharge	Low speed mode			51 - 255	200	–50 - –3000V	–2200V
T	PEEL VOLT MIDDLE BW	reference value	Middle speed mode			51 - 255	200	–50 - –3000V	–2200V

ADJ 2 Image density sensor adjustment

NOTE: Before executing this adjustment, check to confirm the following items.

*Check to confirm that the image density sensor is clean.

*Check to confirm that the transfer belt is clean and free from scratches.

NOTE: This adjustment executes automatically at the outset of registration adjustment operation and process control operation as well as SIM44-2.

Normally, therefore, it is not required to perform this adjustment. It is performed only when the sensor is replaced or when the adjustment result is checked.

1)Enter SIM44-2 mode.

		6,08/$7,21	12		&/26(
7(67
352&21 *$,1 $'-8670(17
		3&6B. /(' $'-		5(*B5 %(/7 0$;
		3&6B. '$5.		5(*B5 %(/7 0,1
		3&6B. *51'		5(*B5 %(/7 ',)
		3&6B. %(/7 0$;
		3&6B. %(/7 0,1		5(*B5 3$7&+ .
		3&6B. %(/7 ',)
		5(*B5 /(' $'-
		5(*B5 '$5.
		5(*B5 *51'
				(;(&87(

MX-B401 ADJUSTMENTS 4 – 3

2)Press [EXECUTE] key.

The image density sensor is automatically adjusted.

After completion of the adjustment, the adjustment result is displayed and [EXECUTE] key returns to the normal display.

	Display/Item	Content	Range	Default
A	PCS_K LED ADJ	Image density sensor light	1 - 255	21
		emitting quantity
		adjustment value
B	PCS_K DARK	Dark voltage	0 - 255	0
C	PCS_K GRND	Belt base detection level	0 - 255	0
		when completion of Item A
		adjustment
D	PCS_K BELT MAX	Maximum value of belt	0 - 255	0
		base detection level
E	PCS_K BELT MIN	Minimum value of belt	0 - 255	0
		base detection level
F	PCS_K BELT DIF	Belt base detection level	0 - 255	0
		difference
		(Item D - Item E)
G	REG_R LED ADJ	Image density sensor light	1 - 255	32
		emitting quantity
		adjustment value
H	REG_R DARK	Image density sensor dark	0 - 255	0
		voltage
I	REG_R GRND	Belt base detection level	0 - 256	0
		when completion of Item
		G adjustment
J	REG_R BELT MAX	Maximum value of belt	0 - 255	0
		base detection level
K	REG_R BELT MIN	Minimum value of belt	0 - 255	0
		base detection level
L	REG_R BELT DIF	Belt base detection level	0 - 255	0
		difference (Item J - Item K)
M	REG_R PATCH (K)	Patch detection level for	0 - 255	0
		check

If the adjustment is not completed normally, "ERROR" is displayed.

Error name	Error content
Image density sensor	PCS_K LED ADJ error
adjustment abnormality	The target is not reached by 3 times of
	retry.
Substrate scan abnormality	PCS_K GRND error
	Effective difference between the upper
	and lower values of the belt substrate
	circuit, outside the range
Registration sensor R	REG_R LED ADJ error
adjustment abnormality	The target is not reached by 3 times of
	retry.
Registration substrate R	REG_R GRND error
scan abnormality	Effective difference between the upper
	and lower values of the belt substrate
	circuit, outside the range

Error display		Error content
BK_SEN_ADJ	Image density		PCS_K LED ADJ error (The
_ERR	sensor adjustment		target value is not obtained after
	abnormality		retried three times.)
BELT_READ	Transfer belt		PCS_K GRND error (The surface
_ERR	surface reading		detection level is maximum or the
	abnormality		minimum value difference is
			outside a reference range.)
REG_SEN_R	Sensor adjustment		REG_R LED ADJ error (The
_ADJ_ERR	abnormality		target value is not obtained after
			retried three times.)
REG_BELT_R	Transfer belt		REG_R GRND error (The
_READ_ERR	surface reading		surface detection level is
	abnormality		maximum or the minimum value
			difference is outside a reference
			range.)

When an error occurs, check the following sections for any abnormality.

•Image density sensor

•PCU PWB

•Transfer belt (dirt, scratch)

•Transfer belt cleaner

If any abnormality is found, repair and adjust again.

If an error occurs, the adjustment result is not revised.

ADJ 3 Image skew adjustment (LSU unit)

This adjustment is needed in the following situations:

*When the LSU unit is replaced.

*When the LSU unit is removed from the main unit.

The image skew adjustment (LSU unit) is performed by changing the parallelism of the LSU unit scan laser beams for the OPC drum.

1)Enter SIM64-2 mode.

Set the set items to the values shown below.

A: 1	B: 1		C: 254		D: 255
7(67 6,08/$7,21		12						&/26(
6(/) 35,17 %: 6(59,&(
		$		35,17 3$77(51
$		%		'27 '27		,) $

	&		'27 '27	,) $
	'		'(16,7< ),;(' ,) $
			08/7, &2817
	(
			(;32685(	,) $ 67$1'$5' ',7+(5
	)
	*		3$3(5 &6
	+		'83/(; 12
			3$3(5 7<3( 3/$,1
	,

(;(&87( 2.

2)Select the tray with A4 (11" x 8.5") paper in it.

3)Press [EXECUTE] key.

The check pattern is printed out.

4)Check the printed image for any skew.

There are following two methods of checking the image for any skew (right angle).

Method 1:

Measure the length of the diagonal lines of the rectangle print pattern. Check the difference in the length of the diagonal lines for judgment of good or no good

Method 2:

Compare the right angle of vertical side/horizontal side of the rectangle print pattern and the right angle sides of A4 (11" x 8.5") paper for judgment of good or no good.

(NOTE)

In the case of Method 2, the right angle of paper to be used may not be exact. Be sure to check the right angle of paper to be used in advance.

MX-B401 ADJUSTMENTS 4 – 4