Utax PF 740 User manual

Service
Manual
Paper Feeder
3)
PF 740B 

Rev.: 2.0
Date: 28-10-2013
3NFSM062

Service
Manual
Paper Feeder
3)
PF 740B 

Rev.: 2.0
Date: 28-05-2013
3NFSM062

CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE
OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
It may be illegal to dispose of this battery into the municipal waste stream. Check with your
local solid waste officials for details in your area for proper disposal.
ATTENTION
IL Y A UN RISQUE D’EXPLOSION SI LA BATTERIE EST REMPLACEE PAR UN MODELE
DE TYPE INCORRECT. METTRE AU REBUT LES BATTERIES UTILISEES SELON LES
INSTRUCTIONS DONNEES.
Il peut être illégal de jeter les batteries dans des eaux d’égout municipales. Vérifiez avec les
fonctionnaires municipaux de votre région pour les détails concernant des déchets solides
et une mise au rebut appropriée.

Revision history
Revision Date Replaced pages Remarks
1 April 6, 2011 CONTENTS, 2-4-1 to 2-4-3 -
2October 10, 2013 COVER,CONTENTS,1-1-1,1-2-6,1-3-2,1-3-5 to
1-3-29,1-4-1 to 1-4-18,1-5-2 to 1-5-10,2-1-4,2-1-6,
2-2-3,2-3-3,2-3-5,2-4-1,2-4-3
-

This page is intentionally left blank.

Safety precautions
This booklet provides safety warnings and precautions for our service personnel to ensure the safety of
their customers, their machines as well as themselves during maintenance activities. Service personnel
are advised to read this booklet carefully to familiarize themselves with the warnings and precautions
described here before engaging in maintenance activities.

Safety warnings and precautions
Various symbols are used to protect our service personnel and customers from physical danger and
to prevent damage to their property. These symbols are described below:
DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect
compliance with warning messages using this symbol.
WARNING: Serious bodily injury or death may result from insufficient attention to or incorrect compliance
with warning messages using this symbol.
CAUTION: Bodily injury or damage to property may result from insufficient attention to or incorrect com-
pliance with warning messages using this symbol.
Symbols
The triangle ( ) symbol indicates a warning including danger and caution. The specific point of attention is
shown inside the symbol.
General warning. Warning of risk of electric shock.
Warning of high temperature.
indicates a prohibited action. The specific prohibition is shown inside the symbol.
General prohibited action. Disassembly prohibited.
indicates that action is required. The specific action required is shown inside the symbol.
General action required. Remove the power plug from the wall outlet.
Always ground the copier.

1. Installation Precautions
WARNING
• Do not use a power supply with a voltage other than that specified. Avoid multiple connections to
one outlet: they may cause fire or electric shock. When using an extension cable, always check that
it is adequate for the rated current. .....................................................................................................
• Connect the ground wire to a suitable grounding point. Not grounding the copier may cause fire or
electric shock. Connecting the earth wire to an object not approved for the purpose may cause
explosion or electric shock. Never connect the ground cable to any of the following: gas pipes, light-
ning rods, ground cables for telephone lines and water pipes or faucets not approved by the proper
authorities. ..........................................................................................................................................
CAUTION:
• Do not place the copier on an infirm or angled surface: the copier may tip over, causing injury. .........
• Do not install the copier in a humid or dusty place. This may cause fire or electric shock. .................
• Do not install the copier near a radiator, heater, other heat source or near flammable material. This
may cause fire. ...................................................................................................................................
• Allow sufficient space around the copier to allow the ventilation grills to keep the machine as cool
as possible. Insufficient ventilation may cause heat buildup and poor copying performance. ............
• Always handle the machine by the correct locations when moving it. .................................................
• Always use anti-toppling and locking devices on copiers so equipped. Failure to do this may cause
the copier to move unexpectedly or topple, leading to injury. ..............................................................
• Avoid inhaling toner or developer excessively. Protect the eyes. If toner or developer is accidentally
ingested, drink a lot of water to dilute it in the stomach and obtain medical attention immediately.
If it gets into the eyes, rinse immediately with copious amounts of water and obtain medical atten-
tion. .....................................................................................................................................................
• Advice customers that they must always follow the safety warnings and precautions in the copier’s
instruction handbook. .........................................................................................................................

2. Precautions for Maintenance
WARNING
• Always remove the power plug from the wall outlet before starting machine disassembly. ................
• Always follow the procedures for maintenance described in the service manual and other related
brochures. ..........................................................................................................................................
• Under no circumstances attempt to bypass or disable safety features including safety mechanisms
and protective circuits. ........................................................................................................................
• Always use parts having the correct specifications. ............................................................................
• Always use the thermostat or thermal fuse specified in the service manual or other related brochure
when replacing them. Using a piece of wire, for example, could lead to fire or other serious acci-
dent. ...................................................................................................................................................
• When the service manual or other serious brochure specifies a distance or gap for installation of a
part, always use the correct scale and measure carefully. ..................................................................
• Always check that the copier is correctly connected to an outlet with a ground connection. ...............
• Check that the power cable covering is free of damage. Check that the power plug is dust-free. If it
is dirty, clean it to remove the risk of fire or electric shock. .................................................................
• Never attempt to disassemble the optical unit in machines using lasers. Leaking laser light may
damage eyesight. ...............................................................................................................................
• Handle the charger sections with care. They are charged to high potentials and may cause electric
shock if handled improperly. ...............................................................................................................
CAUTION
• Wear safe clothing. If wearing loose clothing or accessories such as ties, make sure they are safely
secured so they will not be caught in rotating sections. ......................................................................
• Use utmost caution when working on a powered machine. Keep away from chains and belts. ..........
• Handle the fixing section with care to avoid burns as it can be extremely hot. ..................................
• Check that the fixing unit thermistor, heat and press rollers are clean. Dirt on them can cause
abnormally high temperatures. ...........................................................................................................

• Do not remove the ozone filter, if any, from the copier except for routine replacement. ......................
• Do not pull on the AC power cord or connector wires on high-voltage components when removing
them; always hold the plug itself. ........................................................................................................
• Do not route the power cable where it may be stood on or trapped. If necessary, protect it with a
cable cover or other appropriate item. ................................................................................................
• Treat the ends of the wire carefully when installing a new charger wire to avoid electric leaks. ..........
• Remove toner completely from electronic components. .....................................................................
• Run wire harnesses carefully so that wires will not be trapped or damaged. ......................................
• After maintenance, always check that all the parts, screws, connectors and wires that were
removed, have been refitted correctly. Special attention should be paid to any forgotten connector,
trapped wire and missing screws. .......................................................................................................
• Check that all the caution labels that should be present on the machine according to the instruction
handbook are clean and not peeling. Replace with new ones if necessary. .......................................
• Handle greases and solvents with care by following the instructions below: ......................................
· Use only a small amount of solvent at a time, being careful not to spill. Wipe spills off completely.
· Ventilate the room well while using grease or solvents.
· Allow applied solvents to evaporate completely before refitting the covers or turning the power
switch on.
· Always wash hands afterwards.
• Never dispose of toner or toner bottles in fire. Toner may cause sparks when exposed directly to
fire in a furnace, etc. ...........................................................................................................................
• Should smoke be seen coming from the copier, remove the power plug from the wall outlet immedi-
ately. ...................................................................................................................................................
3. Miscellaneous
WARNING
• Never attempt to heat the drum or expose it to any organic solvents such as alcohol, other than the
specified refiner; it may generate toxic gas. ........................................................................................
• Keep the machine away from flammable liquids, gases, and aerosols. A fire or an electric shock
might occur. ........................................................................................................................................

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3NF-2
CONTENTS
1-1 Specifications
1-1-1 Specifications ........................................................................................................................1-1-1
1-1-2 Parts names ..........................................................................................................................1-1-2
1-1-3 Machine cross section...........................................................................................................1-1-3
1-2 Installation
1-2-1 Installation environment.........................................................................................................1-2-1
1-2-2 Unpacking..............................................................................................................................1-2-2
(1) Precaution for unpacking..................................................................................................1-2-2
1-2-3 Unpacking..............................................................................................................................1-2-3
(1) Unpacking.........................................................................................................................1-2-3
(2) Remove the tapes and pad ..............................................................................................1-2-4
1-2-4 Installing the cassette heater (Option)...................................................................................1-2-6
1-3 Maintenance Mode
1-3-1 Maintenance mode................................................................................................................1-3-1
(1) Executing a maintenance item .........................................................................................1-3-1
(2) Maintenance modes item list............................................................................................1-3-2
(3) Contents of the maintenance mode items........................................................................1-3-3
1-4 Troubleshooting
1-4-1 Paper mis feed detection.......................................................................................................1-4-1
(1) Paper mis feed indication.................................................................................................1-4-1
(2) Paper mis feed detection condition ..................................................................................1-4-3
1-4-2 Troubleshooting.....................................................................................................................1-4-7
(1) First check items...............................................................................................................1-4-7
1-4-3 Self-diagnostic function .......................................................................................................1-4-12
(1) Self-diagnostic function ..................................................................................................1-4-12
(2) Self diagnostic codes......................................................................................................1-4-13
1-4-4 Electric problems.................................................................................................................1-4-19
1-4-5 Mechanical problems...........................................................................................................1-4-21
1-5 Assembly and Disassembly
1-5-1 Precautions for assembly and disassembly...........................................................................1-5-1
(1) Precautions.......................................................................................................................1-5-1
1-5-2 Paper feed section.................................................................................................................1-5-2
(1) Detaching and refitting the primary paper feed unit..........................................................1-5-2
(2) Detaching and refitting the PF forwarding, PF paper feed and
PF separation pulleys (Right)...........................................................................................1-5-6
(3) Detaching and refitting the PF forwarding,
PF paper feed and PF separation pulleys (Left)...............................................................1-5-8
1-5-3 PWBs...................................................................................................................................1-5-11
(1) Detaching and refitting the PF main PWB......................................................................1-5-11
1-5-4 Driving section.....................................................................................................................1-5-13
(1) Detaching and refitting the PF Driving unit.....................................................................1-5-13
(2) Detaching and refitting the PF lift motors .......................................................................1-5-15

3NF-2
2-1 Mechanical Construction
2-1-1 Paper feed section.................................................................................................................2-1-1
(1) Right cassette section ......................................................................................................2-1-1
(2) Left cassette section.........................................................................................................2-1-2
(3) Right cassette paper feed.................................................................................................2-1-3
(4) Left cassette paper feed...................................................................................................2-1-5
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout ............................................................................................................2-2-1
(1) PWB and sensors.............................................................................................................2-2-1
(2) Motors and others.............................................................................................................2-2-3
2-3 Operation of the PWBs
2-3-1 PF main PWB........................................................................................................................2-3-1
2-4 Appendixes
2-4-1 Appendixes............................................................................................................................2-4-1
(1) List of maintenance parts .................................................................................................2-4-1
(2) Periodic maintenance procedures....................................................................................2-4-2
(3) Wiring diagram .................................................................................................................2-4-3
INSTALLATION GUIDE
LARGE CAPACITY FEEDER

3NF-2
1-1-1
1-1 Specifications
1-1-1 Specifications
NOTE: These specifications are subject to change without notice.
Item Specifications
Paper Supply Method Feed & reverse roller method (No. Sheets: 3,000 (80 g/m2)/No. Sheets:
3,500 (64 g/m2))
Paper Size A4, B5, Letter
Supported
Paper
Paper
weight 60 to 256 g/m2
Media
types Plain, Recycled, Thick, Veiium
Dimensions
(W ×D ×H) 23 35/64 × 27 52/64 × 12 26/64" 598 × 706.6 × 315 mm
Weight Approx. 63.93 lbs / Approx. 29 kg
Power source Electrically connected to the machine. (3.3 V DC, 24 V DC)

3NF
1-1-2
1-1-2 Parts names
Figure 1-1-1
1
2
3
4
1. Cassette 4
2. Cassette 3
3. Lift plate
4. PF paper conveying cover

3NF
1-1-3
1-1-3 Machine cross section
Figure 1-1-2
Paper path

3NF
1-1-4
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3NF
1-2-1
1-2 Installation
1-2-1 Installation environment
Installation location (Be based on the machine establishment place.)
Avoid direct sunlight or bright lighting. Ensure that the photo conductor will not be exposed to direct sunlight or
other strong light when removing paper jams.
Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt
change in the environmental temperature; and cool or hot, direct air.
Avoid places subject to dust and vibrations.
Choose a surface capable of supporting the weight of the machine.
Place the machine on a level surface (maximum allowance inclination: 1°).
Avoid air-borne substances that may adversely affect the machine or degrade the photo conductor, such as
mercury, acidic of alkaline vapors, inorganic gasses, NOx, SOx gases and chlorine-based organic solvents.
Select a well-ventilated location.

3NF
1-2-2
1-2-2 Unpacking
(1) Precaution for unpacking
Hold the positions shown in the figure and remove the paper feeder from the outer case.
Figure 1-2-1

3NF
1-2-3
1-2-3 Unpacking
(1) Unpacking
Figure 1-2-2 Unpacking
Caution: Place the machine on a level surface. See the Installation Guide for installation.
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1. Paper feeder
2. Outer case
3. Inner case
4. Bottom left pad
5. Bottom right pad
6. Upper left pad
7. Upper right pad
8. Rear pad
9. Machine cover
10. Plastic bag
11. Installation guide
12. Accessory box
13. Plastic bag
14. Paper size plates
15. Plastic bag
16. Middle roller unit
17. Plastic bag
18. S tight screw M4 x 8B
19. Clamp
20. Wire cover
21. Plastic bag
22. S tight screws M4 x 8B
23. Pins
24. Retainer
25. Plastic bag
26. Supporting plate
27. Plastic bag
28. S tight screws M4 x 20B