Mita PointSource Ai 3010 User manual

3010 S/M (MCA)
SERVICE
MANUAL
Published in Apr. ’00
2AR70765
Revision 5
PointSource Ai 3010
R

Service
Manual
PointSource
Ai 3010

CAUTION
DANGEROFEXPLOSIONIFBATTERYISINCORRECTLYRE-
PLACED.REPLACEONLYWITHTHESAMEOREQUIVALENT
TYPE RECOMMENDED BY THE MANUFACTURER. DISPOSE
OF USED BATTERIES ACCORDING TO THE MANUFAC-
TURER’S INSTRUCTIONS.
ATTENTION
IL Y A DANGER D’EXPLOSION S’IL Y A REMPLACEMENT IN-
CORRECT DE LA BATTERIE. REMPLACER UNIQUEMENT
AVEC UNE BATTERIE DU MÊME TYPE OU D’UN TYPE REC-
OMMANDÉ PAR LE CONSTRUCTEUR. METTRE AU RÉBUT
LES BATTERIES USAGÉES CONFORMÉMENT AUX INSTRUC-
TIONS DU FABRICANT.

Safetyprecautions
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
Varioussymbolsareusedtoprotectourservicepersonneland
customersfromphysicaldangerandtopreventdamagetotheir
property.Thesesymbolsaredescribedbelow:
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 compliance 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, lightning 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 attention.....................................................................................
• 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 accident............
• 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 main 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 immediately. ..................................................
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. .........................................................................................................

2AR
CONTENTS
I THEORY AND CONSTRUCTION SECTION
1-1 Specifications
1-1-1 Specifications .............................................................................. 1-1-1
1-2 Handling Precautions
1-2-1 Drum............................................................................................ 1-2-1
1-2-2 Developer and toner .................................................................... 1-2-1
1-3 Mechanical Construction
1-3-1 Part names and their functions.................................................... 1-3-1
1-3-2 Machine cross section ................................................................. 1-3-3
1-3-3 Drive system................................................................................ 1-3-4
1-3-4 Mechanical construction .............................................................. 1-3-6
II ELECTRICAL SECTION
2-1 Electrical Parts Layout
2-1-1 Electrical parts layout .................................................................. 2-1-1
2-2 Detection of Paper Misfeed
2-2-1 Paper misfeed detection.............................................................. 2-2-1
2-2-2 Paper misfeed detection conditions ............................................ 2-2-2
2-3 Operation of the PCBs
2-3-1 Power source PCB ...................................................................... 2-3-1
2-3-2 Main PCB .................................................................................... 2-3-3
2-3-3 Scanner control PCB ................................................................... 2-3-5
2-3-4 Engine PCB ................................................................................. 2-3-6
2-3-5 Scanner motor PCB .................................................................... 2-3-7
2-3-6 Operation unit main PCB, operation unit right PCB
and operation unit left PCB ......................................................... 2-3-8
2-3-7 CCD PCB .................................................................................. 2-3-10
2-3-8 Laser diode PCB and beam detection PCB .............................. 2-3-11
III SET UP AND ADJUSTMENT SECTION
3-1 Installation
3-1-1 Unpacking and installation ........................................................... 3-1-1
3-1-2 Setting initial copy modes.......................................................... 3-1-16
3-1-3 Installing the add-on memory SIMM (option) ............................ 3-1-17
3-1-4 Installing the drawer heater (service part) ................................. 3-1-19
3-1-5 Installing the key counter (option) ............................................. 3-1-21
3-1-6 Installing the MMD host monitoring system device (option) ...... 3-1-24
3-1-7 Installing the DF (option) ........................................................... 3-1-26
3-2 Maintenance Mode
3-2-1 Maintenance mode ...................................................................... 3-2-1
3-2-2 Copier management .................................................................. 3-2-86
3-3 Assembly and Disassembly
3-3-1 Precautions for assembly and disassembly .................................. 3-3-1
3-3-2 Paper feed section .........................................................................3-3-3
3-3-3 Optical section..............................................................................3-3-24
3-3-4 Main charging section ..................................................................3-3-43
3-3-5 Drum section ................................................................................3-3-47

2AR
2AR-1
(4) Scanner control PCB................................................................. 3-6-32
(5) Scanner motor PCB .................................................................. 3-6-35
(6) CCD PCB .................................................................................. 3-6-37
(7) Operation unit main PCB........................................................... 3-6-39
(8) Operation unit left PCB.............................................................. 3-6-42
(9) Operation unit right PCB ........................................................... 3-6-43
(10) LCD ........................................................................................... 3-6-44
3-6-4 Electrical problems .......................................................................... 3-6-45
(1) The machine does not operate when the main switch is
turned on. .................................................................................. 3-6-45
(2) The drive motor does not operate (C200). ................................ 3-6-45
(3) The scanner motor does not operate. ....................................... 3-6-46
(4) The upper lift motor does not operate (C241). .......................... 3-6-46
(5) The lower lift motor does not operate (C242)............................ 3-6-46
(6) The toner feed motor does not operate..................................... 3-6-47
(7) The paper conveying section fan motor does not operate. ....... 3-6-47
(8) Cooling fan motor 1 does not operate at all or does not turn
at full speed. .............................................................................. 3-6-47
(9) Cooling fan motor 2 does not operate at all or does not turn
at full speed. .............................................................................. 3-6-47
(10) The upper paper feed clutch does not operate. ........................ 3-6-48
(11) The lower paper feed clutch does not operate. ......................... 3-6-48
(12) Feed clutch 1 does not operate................................................. 3-6-48
(13) Feed clutch 2 does not operate................................................. 3-6-48
(14) Feed clutch 3 does not operate................................................. 3-6-49
(15) The registration clutch does not operate. .................................. 3-6-49
(16) The cleaning lamp does not turn on. ......................................... 3-6-49
(17) The exposure lamp does not turn on......................................... 3-6-49
(18) The exposure lamp does not turn off......................................... 3-6-50
(19) Fixing heater M or S does not turn on (C620). .......................... 3-6-50
(20) Fixing heater M or S does not turn off
(fixing unit thermostat triggered; C630). .................................... 3-6-50
(21) Main charging is not performed (C510)..................................... 3-6-50
(22) Transfer charging is not performed. .......................................... 3-6-51
(23) No developing bias is output. .................................................... 3-6-51
(24) The original size is not detected................................................ 3-6-51
(25) The original size is not detected correctly. ................................ 3-6-52
(26) The message requesting paper to be loaded is shown when
paper is present in the upper drawer......................................... 3-6-52
(27) The message requesting paper to be loaded is shown when
paper is present in the lower drawer. ........................................ 3-6-52
(28) The size of paper in the upper drawer is not displayed
correctly..................................................................................... 3-6-53
(29) The size of paper in the lower drawer is not displayed
correctly..................................................................................... 3-6-53
(30) A paper jam in the paper feed or paper conveying section
is indicated when the main switch is turned on. ........................ 3-6-54
(31) The message requesting covers to be closed is displayed
when the front, left 1 and left 2 covers are closed..................... 3-6-54
(32) Others........................................................................................ 3-6-54

2AR
2AR-1
3-6-5 Mechanical problems....................................................................... 3-6-55
(1) No primary paper feed............................................................... 3-6-55
(2) No secondary paper feed. ......................................................... 3-6-55
(3) Skewed paper feed. .................................................................. 3-6-55
(4) The scanner does not travel...................................................... 3-6-56
(5) Multiple sheets of paper are fed at one time. ............................ 3-6-56
(6) Paper jams. ............................................................................... 3-6-56
(7) Toner drops on the paper conveying path................................. 3-6-56
(8) Abnormal noise is heard............................................................ 3-6-56

3010 S/M (MCA)
THEORY AND
CONSTRUCTION
SECTION
I
I Theory and Construction Section

2AR
CONTENTS
1-1 Specifications
1-1-1 Specifications..................................................................................... 1-1-1

2AR
1-1-1
1-1-1 Specifications
Type ............................................... Desktop
Copying system ............................. Dry, indirect electrostatic system
Originals ......................................... Sheets and books
Maximum size: A3/11" x 17"
Original feed system ...................... Fixed
Copy paper .................................... Drawer: Plain paper (64 – 80 g/m2)
Bypass table (optional for 120 V specificaitons):
Plain paper (60 – 160 g/m2)
Special paper: Transparencies, tracing paper,
colored paper and letterhead
Note: Use the bypass table for special paper.
Copying sizes................................. Maximum: A3/11" x 17"
Minimum: A6R (when the bypass table is used) /
51/2" ×81/2"
Magnification ratios ........................ Manual mode: 25 – 400%, 1% increments
(25 – 200%, when the SRDF is used)
Auto copy mode: fixed ratios
Metric
1:1 ±1.0%, 1:4.00/1:2.00/1:1.41/1:1.27/1:1.06/
1:0.90/1:0.75/1:0.70/1:0.50/1:0.25
Inch
1:1 ±1.0%, 1:4.00/1:2.00/1:1.54/1:1.29/1:1.21/
1:0.78/1:0.77/1:0.64/1:0.50/1:0.25
Copy speed .................................... At 100% magnification in memory copy mode:
A4: 31 copies/min.
A4R: 23 copies/min.
A3: 17 copies/min.
B4 (257 x 364 mm): 19 copies/min.
11" x 81/2": 30 copies/min.
81/2" x 11": 24 copies/min.
11" x 17": 16 copies/min.
81/2" x 14": 19 copies/min.
First copy time................................ From 5 to 6 s (A4/11" x 81/2", 100% magnification,
upper drawer, ejection to the eject tray)
Warm-up time ................................ 45 s or less (room temperature 20°C/68°F, 65%
RH)
In preheat/energy saver mode: 30 s or less (room
temperature 20°C/68°F, 65% RH)
Paper feed system ......................... Automatic feed
Capacity:
Drawers: 550 sheets
Manual feed
Capacity:
Bypass: 200 sheets
2AR-1

2AR
1-1-2
Continuous copying ....................... 1 – 999 sheets
Photoconductor .............................. OPC (drum diameter 30 mm)
Charging system ............................ Single positive corona charging
Exposure light source .................... Semiconductor laser
Exposure scanning system ............ Polygon mirror
Developing system......................... Dry, reverse developing (magnetic brush)
Developer: 2-component, ferrite carrier and N29T
black toner
Toner density control: toner sensor
Toner replenishing: automatic from a toner cartridge
Transfer system ............................. Transfer roller
Fixing system ................................. Heat roller
Heat source: halogen heaters (main 550 W, sub
400 W)
Control temperature: 175°C/347°F (at normal
ambient temperature)
Abnormally high temperature protection device:
140°C/284°F thermostat
Fixing pressure: 49 N
Charge erasing system .................. Exposure by cleaning lamp
Cleaning system ............................ Cleaning blade
Scanning system............................ Flat bed scanning by CCD image sensor
Bit map memory ............................. 12 MB (standard)
Image storage memory .................. 16 MB (standard)
Resolution ...................................... 600 x 600 dpi
Light source ................................... Inert gas lamp
Dimensions .................................... 585 (W) x 600 (D) ×745 (H) mm
231/16" (W) x 235/8" (D) x 295/16" (H)
Weight ............................................ Approx. 81 kg/178.2 lbs
Floor requirements ......................... 585 (W) x 600 (D) mm
231/16" (W) x 235/8" (D)
Functions ....................................... Self-diagnostics, preheat,
automatic copy density control,
original size detection, automatic paper selection,
automatic magnification selection,
enlargement/reduction copy, fixed ratio selection,
XY zoom mode, photo mode, margin copy,
print page numbers function, split copy,
border erasing, form overlay, combine copy,
sort copy, invert copy, mirror image mode,
program copy, department control and
language selection
Power source ................................. 120 V AC, 60 Hz, 10 A
220 – 240 V AC, 50/60 Hz, 5.5 A
Power consumption ....................... 1200 W (120V)
1320W (220 – 240V)
2AR-1

2AR
1-1-3
Options........................................... SRDF, duplex unit, job separator, mailbox,
eject unit, feedshift unit, paper feed desk,
large paper deck, finisher, key counter, key card*,
add-on memory SIMM,
bypass unit*, original cover, fax board, printerboard
and network board.
* Optional for 120 V specifications only.
2AR-1

2AR
CONTENTS
1-2 Handling Precautions
1-2-1 Drum .................................................................................................. 1-2-1
1-2-2 Developer and toner .......................................................................... 1-2-1

2AR
1-2-1
1-2-1 Drum
Note the following when handling or storing the drum.
•Whenremoving theimageformation unit,neverexpose thedrumsurface to strongdirect
light.
•Keep the drum at an ambient temperature between 0°C/32°F and 35°C/95°F and at a
relative humidity not higher than 85% RH. Avoid abrupt changes in temperature and
humidity.
•Avoidexposuretoanysubstancewhichisharmfultoormayaffectthequalityofthedrum.
•Do not touch the drum surface with any object. Should it be touched by hands or stained
with oil, clean it.
•Ifthemachineisleftopenformorethan5minutesformaintenance,removethedrumand
store it in the drum storage bag (Part No. 78369020).
1-2-2 Developer and toner
Store the developer and toner in a cool, dark place. Avoid direct light and high humidity.

2AR
CONTENTS
1-3 Mechanical Construction
1-3-1 Part names and their functions .......................................................... 1-3-1
1-3-2 Machine cross section ....................................................................... 1-3-3
1-3-3 Drive system ...................................................................................... 1-3-4
1-3-4 Mechanical construction .................................................................... 1-3-6
(1) Paper feed section ...................................................................... 1-3-6
(2) Main charging section ............................................................... 1-3-10
(3) Optical section........................................................................... 1-3-13
(4) Developing section .................................................................... 1-3-19
(5) Transfer and separation section................................................ 1-3-29
(6) Cleaning section........................................................................ 1-3-32
(7) Charge erasing section ............................................................. 1-3-33
(8) Fixing section ............................................................................ 1-3-35