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.
Page 3
Revision history
RevisionDateReplaced pagesRemarks
Page 4
This page is intentionally left blank.
Page 5
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.
Page 6
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.
Page 7
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, lightning rods, ground cables for telephone lines and water pipes or faucets not approved by the proper
• 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-
• 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-
• 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. ...........................................................................................................
Page 9
• 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-
Weight21 kg/ 46.3 lb or less21 kg/ 46.3 lb or less
Power sourceElectrically connected to the machine.
NOTE: These specifications are subject to change without notice.
500 sheets (80 g/m
2
) × 2
1-1-1
Page 14
1-1-2 Parts names
8
6
7
1
4
5
2
4
6
3
9
1. Cassette 2
2. Paper type window
3. Box cover
4. Paper width guide
5. Paper length guide
6. Positioning pins
7. Interface connector
8. Right cover 3
9. Cabinet
(1) Paper feeder (single casette)
3NN/3NP
Figure 1-1-1
1-1-2
Page 15
(2) Paper feeder (double casette)
8
6
7
2
4
5
1
3
3
4
6
1. Cassette 2
2. Cassette 3
3. Paper type window
4. Paper width guide
5. Paper length guide
6. Positioning pins
7. Interface connector
8. Right cover 3
3NN/3NP
Figure 1-1-2
1-1-3
Page 16
1-1-3 Machine cross section
Paper path
Paper path
(1) Paper feeder (single casette)
3NN/3NP
(2) Paper feeder (double casette)
Figure 1-1-3
Figure 1-1-4
1-1-4
Page 17
3NN/3NP
1-2 Installation
1-2-1 Installation environment
Installation location
Avoid direct sunlight or bright lighting. Ensure that the photoconductor 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 photoconductor, such as
mercury, acidic of alkaline vapors, inorganic gasses, NOx, SOx gases and chlorine-based organic solvents.
Select a well-ventilated location.
1-2-1
Page 18
1-2-2 Unpacking
4
1
5
2
3
9
7
6
8
11
13
14
10
12
13
16
15
1. Paper feeder
2. Outer case
3. Inner case
4. Bottom left pad
5. Bottom right pad
6. Upper left front pad
7. Upper left back pad
8. Upper right front pad
9. Upper right back pad
10. Top spacer
11. Plastic sheet
12. Plastic bag (240 × 350)
13. Plastic bag (70 × 110)
14. Installation guide etc.
15. Cursor pins
16. Paper size plates
(1) Unpacking Paper feeder (single casette)
3NN/3NP
Figure 1-2-1
1-2-2
Page 19
(2) Unpacking Paper feeder (double casette)
1. Paper feeder
2. Outer case
3. Inner case
4. Bottom left pad
5. Bottom right pad
6. Upper left front pad
7. Upper left back pad
8. Upper right front pad
9. Upper right back pad
10. Top spacer
11. Plastic sheet
12. Plastic bag (240 × 350)
13. Plastic bag(70 × 110)
14. Installation guide etc.
15. Cursor pins
16. Paper size plates
3NN/3NP
16
15
7
6
8
13
13
10
14
12
4
5
9
3
Place the machine on a level surface.
1
11
Figure 1-2-2
1-2-3
2
Page 20
(3) Removing the tapes
Ta pe
Ta pe
Ta pe
Ta pe
1. Remove four tapes.
3NN/3NP
Figure 1-2-3
1-2-4
Page 21
3NN/3NP
Enter “10871087” using
the numeric keys.
Enter the maintenance item
number using the cursor left/right keys
or numeric keys.
The selected maintenance item is run.
Press the stop key.
Press the start key.
Start
End
Maintenance mode is entered.
The maintenance item is selected.
Maintenance mode is exited and
the system is restarted to initialize it
and to reflect the setting changes.
Repeat the same
maintenance item?
Run another maintenance
item?
Turn the main power switch off and on.
No
No
Yes
Yes
1-3 Maintenance Mode
1-3-1 Maintenance mode
The machine is equipped with a maintenance function which can be used to maintain and service the
machine.
(1) Executing a maintenance item
1-3-1
Page 22
(2) Maintenance modes item list
3NN/3NP
Section
GeneralU019Displaying the ROM version-
Drive, paper
feed and
paper conveying system
Mode settingU341Specific paper feed location setting for printing function-
OthersU901Checking copy counts by paper feed locations-
Item
No.
U034Adjusting the print start timing
Leading edge registration
Center line
U051Adjusting the deflection in the paper0/0/0/0
Content of maintenance item
Initial
setting
0/0/0/0/0/0
0/0/0/0/0
1-3-2
Page 23
(3) Contents of the maintenance mode items
DisplayDescription
MainMain ROM
MMIOperation ROM
EngineEngine ROM
Engine BootEngine booting
RFIDRFID ROM
IO CPUIO CPU ROM
IO CPU BootIO CPU booting
Option LanguageOptional language ROM
Dictionary-
DPDocument processor ROM
DP BootDocument processor booting
PFPaper feeder ROM
PF BootPaper feeder booting
DFDocument finisher ROM
DF BootDocument finisher booting
AKBridge ROM
AK BootBridge booting
Fax APLFax control PWB APL
Fax BootFax control PWB booting
Fax IPLFax control PWB IPL
Item No.Description
U019Displaying the ROM version
Description
Displays the part number of the ROM fitted to each PWB.
Purpose
To check the part number or to decide, if the newest version of ROM is installed.
Method
1. Press the start key. The ROM version are displayed.
2. Change the screen using the cursor up/down keys.
3NN/3NP
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
1-3-3
Page 24
Item No.Description
DisplayDescription
LSUOUT TOPLeading edge registration adjustment
LSUOUT LEFTCenter line adjustment
DisplayDescription
Setting
range
Initial
setting
Change in
value per step
MPT(L)Paper feed from MP tray
(when large size paper is used)
-128 to 127 00.1 mm
Cassette(L)Paper feed from cassette
(when large size paper is used)
-128 to 127 00.1 mm
Duplex(L)Duplex mode (second)
(when large size paper is used)
-128 to 127 00.1 mm
MPT(S)Paper feed from MP tray
(when small size paper is used)
-128 to 127 00.1 mm
Cassette(S)Paper feed from cassette
(when small size paper is used)
-128 to 127 00.1 mm
Duplex(S)Duplex mode (second)
(when small size paper is used)
-128 to 127 00.1 mm
U034Adjusting the print start timing
Description
Adjusts the leading edge registration or center line.
Purpose
Make the adjustment if there is a regular error between the leading edges of the copy image and
original.
Make the adjustment if there is a regular error between the center lines of the copy image and
original.
Method
1. Press the start key.
2. Select the item to be adjusted.
3NN/3NP
Adjustment: Leading edge registration adjustment
1. Press the system menu key.
2. Press the start key to output a test pattern.
3. Press the system menu key.
4. Select the item to be adjusted..
Large size: 218 mm or more in width of paper.
1-3-4
Page 25
Item No.Description
Correct image
Output
example 1
Output
example 2
Leading edge
registration
(20 ± 1.5 mm)
U034
U066
(See the service manual
for the machine.)
U071
(See the service manual
for the machine.)
DisplayDescription
Setting
range
Initial
setting
Change in
value per step
MPTPaper feed from MP tray -128 to 127 00.1 mm
Cassette1Paper feed from cassette 1-128 to 127 00.1 mm
Cassette2Paper feed from optional
cassette 2
-128 to 127 00.1 mm
Cassette3Paper feed from optional
cassette 3
-128 to 127 00.1 mm
DuplexDuplex mode (second)-128 to 127 00.1 mm
U034
5. Change the setting value using the cursor left/right keys or numeric keys.
For output example 1, increase the value. For output example 2, decrease the value.
Figure 1-3-1
6. Press the start key. The value is set.
Remark
When changing the setting value of [Large] each item is modified, equal to amount of the value
which is changed adds also the value of [Small] each item and is pulled.
3NN/3NP
Caution
Check the copy image after the adjustment. If the image is still incorrect, perform the following
adjustments in maintenance mode.
Adjustment: Center line adjustment
1. Press the system menu key.
2. Press the start key to output a test pattern.
3. Press the system menu key.
4. Select the item to be adjusted..
1-3-5
Page 26
Item No.Description
Center line of printing
(within ± 0.5 mm)
Correct image
Output
example 1
Output
example 2
U034
U067
(See the service manual
for the machine.)
U072
(See the service manual
for the machine.)
U0345. Change the setting value using the cursor left/right keys or numeric keys.
For output example 1, increase the value. For output example 2, decrease the value.
Figure 1-3-2
6. Press the start key. The value is set.
3NN/3NP
Caution
Check the copy image after the adjustment. If the image is still incorrect, perform the following
adjustments in maintenance mode.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
1-3-6
Page 27
Item No.Description
DisplayDescriptionSetting rangeInitial setting
MPTPaper feed from MP tray-30 to 200
CassettePaper feed from cassette 1-30 to 200
PFPaper feed from paper feeder-30 to 200
DuplexDuplex mode (second)-30 to 200
OriginalCopy
example 1
Copy
example 2
U051Adjusting the deflection in the paper
Description
Adjusts the deflection in the paper at the registration roller.
Purpose
Make the adjustment if the leading edge of the copy image is missing or varies randomly, or if the
copy paper is Z-folded.
Adjustment
1. Press the start key.
2. Press the system menu key.
3. Place an original and press the start key to make a test copy.
4. Press the system menu key.
5. Select the item to be adjusted.
3NN/3NP
6. Change the setting value using the cursor left/right keys or numeric keys.
For output example 1, increase the value. For output example 2, decrease the value.
The greater the value, the larger the deflection; the smaller the value, the smaller the deflection.
Figure 1-3-3
7. Press the start key. The value is set.
Completion
Press the stop key. The indication for selecting a maintenance item No. appears.
1-3-7
Page 28
Item No.Description
DisplayDescription
Cassette1Cassette 1
Cassette2Cassette 2 (paper feeder)
Cassette3Cassette 3 (paper feeder)
U341Specific paper feed location setting for printing function
Description
Sets a paper feed location specified for printer output (only if a printer kit is installed).
Purpose
To use a paper feed location only for printer output.
A paper feed location specified for printer output cannot be used for copy output.
Method
1. Press the start key.
2. Select the paper feed location for the printer.
3. Select [On] or [Off] using the cursor left/right keys.
* : When an optional paper feed device is not installed, the corresponding count is not dis-
played.
4. Press the start key. The setting is set.
3NN/3NP
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
1-3-8
Page 29
Item No.Description
DisplayDescription
MPTMP tray
Cassette1Cassette 1
Cassette2Cassette 2 (paper feeder)
Cassette3Cassette 3 (paper feeder)
DuplexDuplex unit
U901Checking copy counts by paper feed locations
Description
Displays or clears copy counts by paper feed locations.
Purpose
To check the time to replace consumable parts. Also to clear the counts after replacing the consumable parts.
Method
1. Press the start key. The counts by paper feed locations are displayed.
3NN/3NP
* : When an optional paper feed device is not installed, the corresponding count is not dis-
played.
Clearing
1. Select the counts to be cleared.
[Cassette2] and [Cassette3] cannot be cleared.
2. Select the counts for all and press [Clear].
3. Press the start key. The counter value is cleared.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
1-3-9
Page 30
3NN/3NP
This page is intentionally left blank.
1-3-10
Page 31
3NN/3NP
Sensors
Regist sensor
PF paper feed sensor1
PF paper feed sensor2
Feed sensor
MP paper feed sensor
Eject sensor
Paper full sensor
1
2
3
4
5
6
7
DP paper feed sensor
DP timing sensor
DP regist sensor
DP switchback sensor
Eject paper sensor
Duplex sensor
10
11
12
13
8
9
Paper jam location
MP tray
Cassette1
Cassette2
Cassette3
Machine inside
Duplex section
Right cover2
Job separatot tray
Bridge
Document finsher
DP original tray
DP paper feed section
DP feed section
DP switchback section
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
Document processor
Machine
Paper
feeder
J
K
L
M
N
P
J
K
L
M
N
12
P
8
9
13
10
11
Document
Fisher
1-4 Troubleshooting
1-4-1 Paper misfeed detection
(1) Paper misfeed indication
When a paper misfeed occurs, the machine immediately stops printing and displays the paper misfeed message on the operation panel. To remove paper misfed in the machine, pull out the cassette, open the right
cover.
(2) Paper misfeed detection condition
Figure 1-4-1 Paper jam location
1-4-1
Page 32
3NN/3NP
CodeContentsConditions
0502No paper feed from cassette 2PF feed sensor 1 (PFFS1) does not turn on during
paper feed from cassette 2 (Retry 1 times).
0503No paper feed from cassette 3PF feed sensor 2 (PFFS2) does not turn on during
paper feed from cassette 3 (Retry 1 times).
0512Multiple sheets in cassette 2PF feed sensor 1 (PFFS1) does not turn off during
paper feed from cassette 2.
0513Multiple sheets in cassette 3PF feed sensor 2 (PFFS2) does not turn off during
paper feed from cassette 3.
1403PF feed sensor 1 non arrival
jam
1413PF feed sensor 1 stay jamPF feed sensor 1 (PFFS1) does not turn off during
4002Registration sensor non
arrival jam
4003The registration sensor (RS) does not turn on dur-
4012Registration sensor stay jam The registration sensor (RS) does not turn off dur-
PF feed sensor 1 (PFFS1) does not turn on during
paper feed from cassette 3.
paper feed from cassette 3.
The registration sensor (RS) does not turn on during paper feed from cassette 2.
ing paper feed from cassette 3.
ing paper feed from cassette 2.
Jam
location*
B
C
B
C
E
E
E
E
E
4013The registration sensor (RS) does not turn off dur-
ing paper feed from cassette 3.
4202Eject sensor non arrival jamThe eject sensor (ES) does not turn on during
paper feed from cassette 2.
4203The eject sensor (ES) does not turn on during
paper feed from cassette 3.
4212Eject sensor stay jamThe eject sensor (ES) does not turn off during
paper feed from cassette 2.
4213The eject sensor (ES) does not turn off during
paper feed from cassette 3.
4302Duplex sensor non arrival
jam
4303The duplex sensor (DUS) does not turn on during
4312Duplex sensor stay jamThe duplex sensor (DUS) does not turn off during
4313The duplex sensor (DUS) does not turn off during
4902Bridge conveying sensor 1
non arrival jam
The duplex sensor (DUS) does not turn on during
paper feed from cassette 2.
paper feed from cassette 3.
paper feed from cassette 2.
paper feed from cassette 3.
The bridge conveying sensor 1 (BRCS1) does not
turn on during paper feed from cassette 2.
E
F
F
F
F
F
F
G
G
F
4903The bridge conveying sensor 1 (BRCS1) does not
turn on during paper feed from cassette 3.
*: Refer to figure 1-4-2 for paper jam location (see page 1-4-1).
1-4-2
F
Page 33
3NN/3NP
CodeContentsConditions
4912Bridge conveying sensor 1
stay jam
4913The bridge conveying sensor 1 (BRCS1) does not
5002Bridge conveying sensor 3
non arrival jam
5003The bridge conveying sensor 3 (BRCS3) does not
5012Bridge conveying sensor 3
stay jam
5013The bridge conveying sensor 3 (BRCS3) does not
*: Refer to figure 1-4-2 for paper jam location (see page 1-4-1).
The bridge conveying sensor 1 (BRCS1) does not
turn off during paper feed from cassette 2.
turn off during paper feed from cassette 3.
The bridge conveying sensor 3 (BRCS3) does not
turn on during paper feed from cassette 2.
turn on during paper feed from cassette 3.
The bridge conveying sensor 3 (BRCS3) does not
turn off during paper feed from cassette 2.
turn off during paper feed from cassette 3.
Jam
location*
J
J
J
J
J
J
1-4-3
Page 34
3NN/3NP
1-4-2 Self-diagnostic function
(1) Self-diagnostic function
This machine is equipped with self-diagnostic function. When a problem is detected, the machine stops printing and display an error message on the operation panel. An error message consists of a message prompting
a contact to service personnel and a four-digit error code indicating the type of the error.
(2) Self diagnostic codes
If the part causing the problem was not supplied, use the unit including the part for replacement.
CodeContentsCauses
1020PF lift motor error
(paper feeder)
After cassette 2 is inserted,
PF lift sensor 1 does not turn
on within 12 s. This error is
detected four times successively.
1030PF lift motor error
(paper feeder)
After cassette 3 is inserted,
PF lift sensor 2 does not turn
on within 12 s. This error is
detected four times successively.
Defective bottom
plate elevation
mechanism in the
cassette.
Defective connector cable or poor
contact in the connector.
Defective drive
transmission system of the PF lift
motor 1.
Defective PF lift
motor 1.
Defective PF main
PWB.
Defective bottom
plate elevation
mechanism in the
cassette.
Defective connector cable or poor
contact in the connector.
Check procedures/
corrective measures
Check to see if the bottom plate can move
smoothly and repair it if any problem is
found.
Reinsert the connector. Also check for continuity within the connector cable. If none,
replace the cable.
PF lift motor 1 and PF main PWB (YC4)
Check if the gears rotate smoothly. If not,
grease the bushes and gears. Check for
broken gears and replace if any.
Replace the PF lift motor 1.
Replace the PF main PWB (Refer to the service manual for the paper feeder).
Check to see if the bottom plate can move
smoothly and repair it if any problem is
found.
Reinsert the connector. Also check for continuity within the connector cable. If none,
replace the cable.
PF lift motor 2 and PF main PWB (YC7)
Defective drive
transmission system of the PF lift
motor 2.
Defective PF lift
motor 2.
Defective PF main
PWB.
1-4-4
Check if the gears rotate smoothly. If not,
grease the bushes and gears. Check for
broken gears and replace if any.
Replace the PF lift motor 2.
Replace the PF main PWB (Refer to the service manual for the paper feeder).
Page 35
3NN/3NP
CodeContentsCauses
1800Paper feeder communica-
tion error
A communication error is
detected 10 times in succession.
1900Paper feeder EEPROM error
When writing the data, the
write data and the read data is
not continuously in agreement
5 times.
2600PF drive motor error
(paper feeder)
When the PF drive motor is
driven, error signal is detected
continuously for 1 s.
Improper installation paper feeder.
Defective connector cable or poor
contact in the connector.
Defective engine
PWB.
Defective PF main
PWB.
Defective PF main
PWB.
Device damage of
EEPROM.
Defective connector cable or poor
contact in the connector.
Defective drive
transmission system of the PF drive
motor.
Check procedures/
corrective measures
Follow installation instruction carefully again.
Reinsert the connector. Also check for continuity within the connector cable. If none,
replace the cable.
PF main PWB (YC3) and engine PWB
(YC20)
Replace the engine PWB and check for correct operation.
Replace the PF main PWB (Refer to the service manual for the paper feeder).
Replace the PF main PWB (Refer to the service manual for the paper feeder).
Contact the Service Administrative Division.
Reinsert the connector. Also check for continuity within the connector cable. If none,
replace the cable.
PF drive motor and PF main PWB (YC2)
Check if the rollers and gears rotate
smoothly. If not, grease the bushes and
gears. Check for broken gears and replace if
any.
Defective PF drive
motor.
Defective PF main
PWB.
Replace the PF drive motor.
Replace the PF main PWB (Refer to the service manual for the paper feeder).
1-4-5
Page 36
1-4-3 Electric problems
If the part causing the problem was not supplied, use the unit including the part for replacement.
Troubleshooting to each failure must be in the order of the numbered symptoms.
ProblemCausesCheck procedures/corrective measures
3NN/3NP
(1)
The machine does
not operate when
the main power
switch is turned on.
(2)
PF paper feed
clutch 1 and 2
does not operate.
(3)
PF conveying
clutch does not
operate.
1. No electricity at the
power outlet.
2. The power cord is
not plugged in properly.
3. The right cover 3 is
not closed completely.
4. Broken power cord.Check for continuity. If none, replace the cord.
5. Defective PWB.Replace the PFmain PWB (see page 1-5-4).
1. Defective connector
cable or poor contact in the connector.
2. Defective clutch.Replace the drive unit.
3. Defective PWB.Replace the PFmain PWB and check for correct operation
1. Defective connector
cable or poor contact in the connector.
2. Defective clutch.Replace the PF conveying clutch.
Measure the input voltage.
Check the contact between the power plug and the outlet.
Check the right cover 3.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Paper feed clutch 1 and PFmain PWB (YC4)
Paper feed clutch 2 and PFmain PWB (YC7)
(see page 1-5-4).
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
PF conveying clutch and PFmain PWB (YC4)
(4)
The message
requesting paper to
be loaded is shown
when paper is
present on the cassette.
3. Defective PWB.Replace the PFmain PWB and check for correct operation
(see page 1-5-4).
1. Defective connector
cable or poor contact in the connector.
2. Deformed actuator of
the paper sensor.
3. Defective paper sensor 1 and 2.
4. Defective PWB.Replace the PFmain PWB and check for correct operation
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
Paper sensor 1 and PFmain PWB (YC3)
Paper sensor 2 and PFmain PWB (YC6)
Check visually and replace if necessary.
Replace paper sensor 1 and 2.
(see page 1-5-4).
1-4-6
Page 37
ProblemCausesCheck procedures/corrective measures
3NN/3NP
(5)
The size of paper
on the cassette is
not displayed correctly.
(6)
A paper jam in the
paper feeder is
indicated when the
main power switch
is turned on.
(7)
A message indicating cover open is
displayed when the
right cover 3 is
closed.
1. Defective connector
cable or poor contact in the connector.
2. Defective PF paper
size switch.
3. Defective PWB.Replace the PFmain PWB PWB and check for correct
1. A piece of paper torn
from paper is caught
around PF feed sensor 1 or 2.
2. Defective PF feed
sensor 1 or 2.
1. Defective right cover
3 switch.
2. Defective PWB.Replace the PFmain PWB PWB and check for correct
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
PF paper size length switch 1 and PFmain PWB (YC5)
PF paper size length switch 2 and PFmain PWB (YC6)
PF paper size width switch 1 and PFmain PWB (YC5)
PF paper size width switch 2 and PFmain PWB (YC8)
Replace PF paper size switch.
operation (see page 1-5-4).
Check visually and remove it, if any.
Replace PF feed sensor 1 or 2.
Replace right cover 3 switch.
operation (see page 1-5-4).
1-4-7
Page 38
1-4-4 Mechanical problems
If the part causing the problem was not supplied, use the unit including the part for replacement.
ProblemCauses/check proceduresCorrective measures
3NN/3NP
(1)
No primary paper
feed.
(2)
Skewed paper feed.
(3)
Multiple sheets of
paper are fed.
(4)
Paper jams.
(5)
Abnormal noise is
heard.
Check if the surfaces of the following rollers are dirty with paper powder.
Pickup roller
Paper feed roller
Check if the following rollers is deformed.
Pickup roller
Paper feed roller
Defective paper feed clutch installation.Check visually and remedy if necessary.
Paper width guide in a cassette installed
incorrectly.
Check if the paper is excessively curled.Change the paper.
Paper is loaded incorrectly.Load the paper correctly.
Check if the retard roller is worn.Replace the retard roller if it is worn
Check if the paper is excessively curled.Change the paper.
Deformed guides along the paper conveying path.
Check if the rollers, pulleys and gears
operate smoothly.
Check if the following clutches are
installed correctly.
PF paper feed clutch 1
PF paper feed clutch 2
PF conveying clutch
Clean with isopropyl alcohol.
Check visually and replace any
deformed (see page 1-5-2).
Check the paper width guide visually
and remedy or replace if necessary.
(see page 1-5-2).
Check visually and remedy or replace
any deformed guides.
Grease the bushes and gears.
Check visually and remedy if necessary.
1-4-8
Page 39
3NN/3NP
1-5 Assembly and disassem bly
1-5-1 Precautions for assembly and disassembly
(1) Precautions
Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power
lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet.
When handling PWBs (printed wiring boards), do not touch parts with bare hands.
The PWBs are susceptible to static charge.
Do not touch any PWB containing ICs with bare hands or any object prone to static charge.
When removing the hook of the connector, be sure to release the hook.
Take care not to get the cables caught.
To reassemble the parts, use the original screws. If the types and the sizes of screws are not known, refer to
the PARTS LIST.
1-5-1
Page 40
1-5-2 Paper feed section
Cassette
p
p
(1) Detaching and refitting the primary paper feed units
Procedure
1. Remove cassette.
3NN/3NP
2. Push up the paper feed lever (yellow)
and then remove the primary paper
feed unit.
Figure 1-5-1
Paper feed lever
(yellow)
Primary paper feed unit
1-5-2
Figure 1-5-2
Page 41
(2) Detaching and refitting the drive unit
Rear cover
Screw
Screw
Hook(rear side)
Procedure
1. Remove two screws.
2. Release three hooks and then remove
the rear cover.
3NN/3NP
3. Remove the connector of the motor.
4. Release the wire from hooks.
5. Remove three screws and then remove
the drive unit.
Screw
Screw
Screw
Motor
Connector
Drive unit
Figure 1-5-3
Hook
Wire
Hook
Hook
Figure 1-5-4
1-5-3
Page 42
(3) Detaching and refitting the PF main PWB
Procedure
1. Remove the rear cover.
2. Remove all connectors from the PF
main PWB.
3. Remove two screws.
4. Release two hooks and then remove
the PF main PWB.
PF main PWB
3NN/3NP
Hook
Screw
Screw
PF main PWB
Figure 1-5-5
1-5-4
Page 43
3NN/3NP
1. Pickup roller
2. Paper feed roller
3. Retard roller
4. Feed roller 1
5. PF lift sensor 1 (PFLS1)
6. Cassette base
7. Bottom plate
8. Bottom pad
9. Lift work plate
10. Paper sensor 1(U) (PFPS1(U))
11. Paper sensor 1(L) (PFPS1(L))
12. Actuator (paper sensor 1)
13. PF feed sensor 1
14. Actuator (PF feed sensor 1)
2-1 Mechanical Construction
2-1-1 Mechanical construction
The paper feeder feeds paper from either of its one or two cassettes to the machine.The cassette can contain
500 sheets (80 g/m
paper conveying section by rotation of the paper feed roller. Also the retard roller prevents multiple feeding of
paper.
(1) Paper feeder (single casette)
2
) . The sheet from the cassette is pulled out by rotation of the pickup roller and sent to the
4
2
14
5
1
13
11
10
12
7
3
8
9
6
Figure 2-1-1 Paper feeder (single casette)
2-1-1
Page 44
(2) Paper feeder (double casette)
5
2
3
6
9
10
11
1
17
20
21
2
1
3
9
10
11
12
12
18
19
22
4
13
14
15
16
7
8
1. Pickup roller
2. Paper feed roller
3. Retard roller
4. Feed roller 1
5. Feed roller 2
6. Feed pulley
7. PF lift sensor 1 (PFLS1)
8. PF lift sensor 2 (PFLS2)
9. Cassette base
10. Bottom plate
11. Bottom pad
12. Lift work plate
13. Paper sensor 1(U) (PFPS1(U))
14. Paper sensor 1(L) (PFPS1(L))
15. Paper sensor 2(U) (PFPS2(U))
16. Paper sensor 2(L) (PFPS2(L))
17. Actuator (paper sensor 1)
18. Actuator (paper sensor 2)
19. PF feed sensor 1
20. PF feed sensor 2
21. Actuator (PF feed sensor 1)
22. Actuator (PF feed sensor 2)
3NN/3NP
Figure 2-1-2 Paper feeder (double casette)
2-1-2
Page 45
PFMPWB
YC4-6
3NN/3NP
REG_CL_REM
YC3-12
YC4-3
YC3-3
YC3-6
YC3-9
YC4-1
YC5-1,2,4
YC5-5
YC6-3*
YC6-6*
YC6-9*
YC7-1*
YC8-1,2,4*
YC8-5*
PFFS1
REG_CL_REM1
PFLS1
PFPS1(U)
PFPS1(L)
LIFT_REM1
PAPLSIZE1(1),(2),(3)
PAPWSIZE1
PFLS2
PFPS2(U)
PFPS2(L)
LIFT_REM2
PAPLSIZE2(1),(2),(3)
PAPWSIZE2
PFPLSW1
PFPLSW2
PFPS1(U)
PFPS1(L)
PFPWSW1
PFPS2(U)
PFPS2(L)
PFPWSW2
5
PFLS1
PFLM1
PFLS2
PFLM2
PFDM
PFPF
CL1
PFPF
CL2
PFFS1
5
PFFS2
PFC
CL
YC2-4
YC7-3*
YC6-12*
MAIN_REM
REG_CL_REM2
PFFS2
*: Paper feeder (double casette) only.
Figure 2-1-3
2-1-3
Page 46
3NN/3NP
This page is intentionally left blank.
2-1-4
Page 47
2-2 Electrical Parts Layout
2
3
4
5
6
7
8
9
10
11
13
Machine insideMachine front
Machine rear
1
12
2-2-1 Electrical parts layout
(1) Paper feeder (single casette)
3NN/3NP
Figure 2-2-1 PWBs
1. PF main PWB (PFMPWB) .................... Controls electrical parts.
2. Right cover 3 switch (RC3SW) ............. Breaks the safety circuit when right cover 3 is opened, and resets
paper jam detection.
3. PF lift sensor 1 (PFLS1)....................... Detects the cassette operation plate of cassette 2 reaching the
upper limit.
4. PF paper sensor 1 (U)(PFPS1(U))....... Detects the presence of paper in cassette 2.
5. PF paper sensor 1 (L)(PFPS1(L))........ Detects the presence of paper in cassette 2.
6. PF paper size length switch 1
(PFPLSW1)........................................... Detects the length of paper in cassette 2.
7. PF paper size width switch 1
(PFPWSW1) ......................................... Detects the width of paper in cassette 2.
8. PF feed sensor1 (PFFS1) ..................... Detects the presence of paper.
9. PF drive motor (PFDM)......................... Drives the paper feeder.
10. PF lift motor 1 (PFLM1)......................... Drives the cassette operation plate of cassette 2.
11. PF paper feed clutch 1 (PFPFCL1)....... Primary paper feed from cassette 2.
12. PF paper conveying clutch (PFCCL) .... Conveys paper to the machine.