Copystar CS-1620 User manual

SERVICE
MANUAL
Published in June ’05
2C970946
Revision 6
CS-1620/2020

CAUTION
DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED. REPLACE ONLY WITH
THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE MANUFACTURER. DISPOSE OF
USED BATTERIES ACCORDING TO THE MANUFACTURER’S INSTRUCTIONS.
ATTENTION
IL Y A DANGER D’EXPLOSION S’IL Y A REMPLACEMENT INCORRECT 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 CON-
FORMÉMENT AUX INSTRUCTIONS DU FABRICANT.

Version history
Version Date Replaced pages Remarks
6.0 June 14, 2005 Contents, 1-1-1, 1-2-2, 1-3-5, 1-3-9, 1-3-11, 1-3-12,
1-3-13, 1-4-2, 1-4-3, 1-4-4, 1-4-16-1, 1-4-20,
1-4-23, 1-4-26, 1-5-3, 1-5-4, 1-5-5, 1-5-9, 1-5-10,
1-5-11, 1-5-12, 1-5-15, 1-5-17, 1-5-25, 1-5-29,
1-5-32, 1-6-7, 1-6-20, 1-6-30, 1-6-38, 1-6-38-1,
1-6-44, 2-3-8, 2-3-11, 2-4-7, 2-4-8
-

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
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 acciden-
tally ingested, drink a lot of water to dilute it in the stomach and obtain medical attention immedi-
ately. 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 bro-
chure 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 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 imme-
diately. ............................................................................................................................................
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. .....................................................................................

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2C9-1
CONTENTS
1-1 Specifications
1-1-1 Specifications..........................................................................................................................................1-1-1
1-1-2 Parts names............................................................................................................................................1-1-3
(1) Copier................................................................................................................................................1-1-3
(2) Operation panel.................................................................................................................................1-1-4
1-1-3 Machine cross section ............................................................................................................................1-1-5
1-1-4 Drive system ...........................................................................................................................................1-1-6
1-2 Handling Precautions
1-2-1 Drum .......................................................................................................................................................1-2-1
1-2-2 Toner.......................................................................................................................................................1-2-1
1-2-3 Installation environment..........................................................................................................................1-2-2
1-3 Installation
1-3-1 Unpacking and installation......................................................................................................................1-3-1
(1) Installation procedure........................................................................................................................1-3-1
1-3-2 Setting initial copy modes .......................................................................................................................1-3-5
1-3-3 Installing the paper feeder (option) .........................................................................................................1-3-6
1-3-4 Installing the DP (option).........................................................................................................................1-3-8
1-3-5 Installing the duplex unit (option) ..........................................................................................................1-3-11
1-3-6 Installing the drawer heater (option) .....................................................................................................1-3-14
1-3-7 Installing the key counter (option) .........................................................................................................1-3-17
1-4 Maintenance Mode
1-4-1 Maintenance mode .................................................................................................................................1-4-1
(1) Executing a maintenance item ..........................................................................................................1-4-1
(2) Maintenance mode item list...............................................................................................................1-4-2
(3) Contents of maintenance mode items...............................................................................................1-4-5
1-4-2 Copier management .............................................................................................................................1-4-45
(1) Using the copier management mode ..............................................................................................1-4-45
(2) Setting department management items ..........................................................................................1-4-46
(3) Copy default ....................................................................................................................................1-4-46
1-5 Troubleshooting
1-5-1 Paper misfeed detection .........................................................................................................................1-5-1
(1) Paper misfeed indication...................................................................................................................1-5-1
(2) Paper misfeed detection conditions ..................................................................................................1-5-2
(3) Paper misfeeds .................................................................................................................................1-5-6
1-5-2 Self-diagnosis .......................................................................................................................................1-5-15
(1) Self-diagnostic function ...................................................................................................................1-5-15
(2) Self diagnostic codes ......................................................................................................................1-5-15
1-5-3 Image formation problems ....................................................................................................................1-5-20
(1) No image appears (entirely white)...................................................................................................1-5-21
(2) No image appears (entirely black)...................................................................................................1-5-21
(3) Image is too light. ............................................................................................................................1-5-22
(4) Background is visible.......................................................................................................................1-5-22
(5) A white line appears longitudinally. .................................................................................................1-5-22
(6) A black line appears longitudinally. .................................................................................................1-5-23
(7) A black line appears laterally...........................................................................................................1-5-23
(8) One side of the copy image is darker than the other.......................................................................1-5-23
(9) Black dots appear on the image......................................................................................................1-5-24
(10) Image is blurred...............................................................................................................................1-5-24
(11) The leading edge of the image is consistently misaligned with the original. ...................................1-5-24
(12) The leading edge of the image is sporadically misaligned with the original. ...................................1-5-25
(13) Paper creases. ................................................................................................................................1-5-25

2C9-4
(14) Offset occurs. ..................................................................................................................................1-5-25
(15) Image is partly missing....................................................................................................................1-5-26
(16) Fixing is poor...................................................................................................................................1-5-26
(17) Image is out of focus. ......................................................................................................................1-5-26
(18) Image center does not align with the original center.......................................................................1-5-27
1-5-4 Electric problems ..................................................................................................................................1-5-28
(1) The machine does not operate when the power switch is turned on. .............................................1-5-28
(2) The drive motor does not operate (C2000). ....................................................................................1-5-28
(3) The registration motor does not operate. ........................................................................................1-5-28
(4) The exit motor does not operate. ....................................................................................................1-5-28
(5) The scanner motor does not operate. .............................................................................................1-5-29
(6) Cooling fan motor 1 does not operate.............................................................................................1-5-29
(7) Cooling fan motor 2 does not operate.............................................................................................1-5-29
(8) The paper feed clutch does not operate..........................................................................................1-5-29
(9) The bypass paper feed solenoid does not operate. ........................................................................1-5-29
(10) The cleaning lamp does not turn on................................................................................................1-5-29
(11) The exposure lamp does not turn on...............................................................................................1-5-29
(12) The exposure lamp does not turn off...............................................................................................1-5-30
(13) The fixing heater does not turn on (C6000).....................................................................................1-5-30
(14) The fixing heater does not turn off...................................................................................................1-5-30
(15) Main charging is not performed.......................................................................................................1-5-30
(16) Transfer charging is not performed. ................................................................................................1-5-30
(17) No developing bias is output. ..........................................................................................................1-5-30
(18) The original size is not detected......................................................................................................1-5-30
(19) The original size is not detected correctly. ......................................................................................1-5-30
(20) The message requesting paper to be loaded is shown when paper is present in the drawer.........1-5-31
(21) The size of paper in the drawer is not displayed correctly. .............................................................1-5-31
(22) A paper jam in the paper feed, paper conveying or fixing section is indicated when
the power switch is turned on..........................................................................................................1-5-31
(23) The message requesting covers to be closed is displayed when the front cover and
left cover are closed. .......................................................................................................................1-5-31
(24) Others..............................................................................................................................................1-5-31
1-5-5 Mechanical problems ............................................................................................................................1-5-32
(1) No primary paper feed.....................................................................................................................1-5-32
(2) No secondary paper feed................................................................................................................1-5-32
(3) Skewed paper feed. ........................................................................................................................1-5-32
(4) The scanner does not travel............................................................................................................1-5-32
(5) Multiple sheets of paper are fed at one time. ..................................................................................1-5-32
(6) Paper jams. .....................................................................................................................................1-5-32
(7) Toner drops on the paper conveying path.......................................................................................1-5-32
(8) Abnormal noise is heard..................................................................................................................1-5-32
1-6 Assembly and Disassembly
1-6-1 Precautions for assembly and disassembly............................................................................................1-6-1
(1) Precautions .......................................................................................................................................1-6-1
(2) Running a maintenance item.............................................................................................................1-6-2
1-6-2 Paper feed section..................................................................................................................................1-6-3
(1) Detaching and refitting the separation pulley ....................................................................................1-6-3
(2) Detaching and refitting the forwarding pulley and paper feed pulley.................................................1-6-5
(3) Detaching and refitting the paper conveying unit ..............................................................................1-6-7
(4) Detaching and refitting the bypass paper feed pulley and bypass separation pad ...........................1-6-9
(5) Detaching and refitting the registration left roller.............................................................................1-6-11
(6) Detaching and refitting the registration cleaner...............................................................................1-6-11
(7) Adjustment after roller and clutch replacement...............................................................................1-6-12
(7-1) Adjusting the leading edge registration of image printing........................................................1-6-12
(7-2) Adjusting the leading edge registration for memory image printing ........................................1-6-13
(7-3) Adjusting the center line of image printing ..............................................................................1-6-14
(7-4) Adjusting the trailing edge margin of image printing ...............................................................1-6-15
(7-5) Adjusting the margins for printing............................................................................................1-6-15
(7-6) Adjusting the amount of slack in the paper .............................................................................1-6-16

2C9-6.0
1-6-3 Optical section ......................................................................................................................................1-6-17
(1) Detaching and refitting the exposure lamp......................................................................................1-6-17
(2) Detaching and refitting the scanner wires .......................................................................................1-6-18
(2-1) Detaching the scanner wires...................................................................................................1-6-18
(2-2) Fitting the scanner wires .........................................................................................................1-6-20
(3) Detaching and refitting the ISU (reference).....................................................................................1-6-23
(4) Detaching and refitting the laser scanner unit.................................................................................1-6-24
(5) Adjusting the longitudinal squareness (reference) ..........................................................................1-6-27
(6) Adjusting magnification of the scanner in the main scanning direction ...........................................1-6-28
(7) Adjusting magnification of the scanner in the auxiliary scanning direction......................................1-6-29
(8) Adjusting the scanner leading edge registration .............................................................................1-6-30
(9) Adjusting the scanner center line ....................................................................................................1-6-31
(10) Adjusting the margins for scanning an original on the contact glass...............................................1-6-32
1-6-4 Drum section.........................................................................................................................................1-6-33
(1) Detaching and refitting the drum unit ..............................................................................................1-6-33
(2) Detaching and refitting the drum separation claws .........................................................................1-6-34
(3) Detaching and refitting the main charger unit..................................................................................1-6-35
1-6-5 Developing section................................................................................................................................1-6-36
(1) Detaching and refitting the developing unit ....................................................................................1-6-36
1-6-6 Transfer section ....................................................................................................................................1-6-37
(1) Detaching and refitting the transfer roller ........................................................................................1-6-37
1-6-7 Fixing section........................................................................................................................................1-6-38
(1) Detaching and refitting the fixing unit ..............................................................................................1-6-38
(2) Detaching and refitting the press roller............................................................................................1-6-39
(3) Detaching and refitting the fixing heater M and S ...........................................................................1-6-40
(4) Detaching and refitting the heat roller separation claws..................................................................1-6-41
(5) Detaching and refitting the heat roller .............................................................................................1-6-42
(6) Detaching and refitting the fixing thermostat...................................................................................1-6-43
(7) Detaching and refitting the fixing thermistor....................................................................................1-6-43
(8) Adjusting the fixing unit height (adjusting lateral squareness) ........................................................1-6-44
1-7 Requirements on PCB Replacement
1-7-1 Upgrading the firmware on the main PCB ..............................................................................................1-7-1
1-7-2 Adjustment-free variable resistors (VR) ..................................................................................................1-7-2
1-7-3 Remarks on engine PCB or main PCB replacement ..............................................................................1-7-2
2-1 Mechanical construction
2-1-1 Paper feed section..................................................................................................................................2-1-1
2-1-2 Optical section ........................................................................................................................................2-1-4
(1) Original scanning...............................................................................................................................2-1-5
(2) Image printing....................................................................................................................................2-1-6
2-1-3 Drum section...........................................................................................................................................2-1-8
2-1-4 Developing section................................................................................................................................2-1-10
(1) Formation of magnetic brush...........................................................................................................2-1-11
(2) Single component developing system.............................................................................................2-1-12
2-1-5 Transfer and separation sections..........................................................................................................2-1-13
2-1-6 Fixing section........................................................................................................................................2-1-15
(1) Fixing temperature system..............................................................................................................2-1-16
(2) Fixing temperature control based on ambient temperature.............................................................2-1-16
2-1-7 Exit and switchback sections ................................................................................................................2-1-17
2-1-8 Duplex section ......................................................................................................................................2-1-18
(1) Paper conveying operation in duplex copying.................................................................................2-1-19
2-2 Electrical Parts Layout
2-2-1 Electrical parts layout..............................................................................................................................2-2-1
(1) PCBs .................................................................................................................................................2-2-1
(2) Switches and sensors .......................................................................................................................2-2-2
(3) Motors ...............................................................................................................................................2-2-3
(4) Other electrical components..............................................................................................................2-2-4

2C9
2-3 Operation of the PCBs
2-3-1 Power source PCB..................................................................................................................................2-3-1
2-3-2 Main PCB................................................................................................................................................2-3-4
2-3-3 Engine PCB ............................................................................................................................................2-3-8
2-3-4 Operation unit PCB...............................................................................................................................2-3-14
2-3-5 CCD PCB..............................................................................................................................................2-3-17
2-4 Appendixes
Timing chart No.1....................................................................................................................................2-4-1
Timing chart No.2....................................................................................................................................2-4-2
Timing chart No.3....................................................................................................................................2-4-3
Timing chart No.4....................................................................................................................................2-4-4
Chart of image adjustment procedures...................................................................................................2-4-5
Maintenance parts list.............................................................................................................................2-4-8
Periodic maintenance procedures ..........................................................................................................2-4-9
Optional devices supplied parts list.......................................................................................................2-4-11
General wiring diagram.........................................................................................................................2-4-12

2C9-6.0
1-1-1
1-1 Specific ations
1-1-1 Specifications
Type ................................................Desktop
Copying system ..............................Indirect electrostatic system
Originals..........................................Sheets, books and 3-dimensional objects (Maximum original size: A3)
Maximum size: A3/11" x 17"
Original feed system ....................... Fixed
Copy paper .....................................Paper weights
Drawer: 64 - 105 g/m2
Bypass table: 45 - 160 g/m2
Paper type Drawer: Plain paper, recycled paper and colored paper
Bypass table: Plain paper, recycled paper, thin paper, thick paper and colored paper
Copying sizes .................................Maximum: A3/11" x 17"
Minimum: A6R /51/2" x 8 1/2"
Magnification ratios.........................Manual mode: 50 - 200%, 1% increments
Copy speed.....................................At 100% magnification in copy mode:
16cpm machine 20cpm machine
A4: 16 copies/min. A4: 20 copies/min.
A4R: 13 copies/min. A4R: 13 copies/min.
A3: 8 copies/min. A3: 10 copies/min.
A5R: 10 copies/min. A5R: 10 copies/min.
A6R: 10 copies/min. A6R: 10 copies/min.
B5: 16 copies/min. B5: 20 copies/min.
B5R: 13 copies/min. B5R: 13 copies/min.
B4 (257 x 364 mm): 8 copies/min. B4 (257 x364 mm): 11 copies/min.
11" x 8 1/2": 16 copies/min. 11" x8 1/2": 20 copies/min.
81/2" x 11": 13 copies/min. 8 1/2" x11": 13 copies/min.
11" x 17": 8 copies/min. 11" x17": 10 copies/min.
81/2" x14": 8 copies/min. 8 1/2" x 14": 11 copies/min.
First copy time ................................Approximately 5.9 s (A4/11" x 8 1/2")
Warm-up time .................................Less then 19.8 s (room temperature 20°C/68°F, 50% RH)
Paper feed system..........................Automatic feed
Capacity:
Drawers: 300 sheets (80 g/m2)
Manual feed
Capacity:
Bypass: 50 sheets (A4/11" x 8 1/2" or less)
25 sheets (A3, B4, 11" x 17", 8 1/2" x 14")
Paper ejection system ....................In-machine ejection (face down)
Capacity: 250 sheets (80 g/m2)
Continuous copying ........................1 - 250 sheets
Photoconductor...............................OPC (drum diameter 30 mm)
Charging system.............................Single positive corona charging
Recording system ...........................Semiconductor laser
Developing system .........................Single component developing system
Toner: magnetism toner
Toner replenishing: automatic from a toner container
Transfer system ..............................Transfer roller
Separation system ..........................Curvature separation and separation electrode
Fixing system..................................Heat roller
Heat source: halogen heaters (120 V specifications: main 550 W, sub 400W/ 220-240
V specifications: main 600 W, sub 450 W)
Control temperature: 170°C/338°F (180°C/356°F on and after 6th sheet)
Abnormally high temperature protection device: 180°C/356°F thermostat
Fixing pressure: 44.1 N
Charge erasing system...................Exposure by cleaning lamp
Cleaning system .............................Cleaning blade
Scanning system ............................Flat bed scanning by CCD image sensor
Bitmap memory...............................18 MB (standard)
Image storage memory...................14 MB (standard)
Resolution.......................................600 x 600 dpi

2C9-3
1-1-2
Light source ....................................Inert gas lamp
Dimensions .....................................574 (W) x 552 (D) x 545 (H) mm
22 5/8" (W) x 21 3/4" (D) x 21 1/2" (H)
Weight.............................................Approx. 40.7 kg/89.7 lbs
Floor requirements..........................827 (W) x 552 (D) mm
32 5/8" (W) x 21 3/4" (D)
Functions ........................................Automatic paper selection, Image quality selection, Automatic seizing selection func-
tion, zoom function, Duplex copy, Divided copy, Binding margin, Border width, Aggre-
gate copy, Sort copy, Eco-copy, Copy program and Section management mode
Power source..................................120 V AC, 60 Hz, 9.0 A 220 - 240 V AC, 50 Hz, 5.0 A (Average)
Options ...........................................Document processor, paper feeder, duplex unit, key counter
Duplex unit
Type ................................................Internal type
Copy paper .....................................Paper weights: 64 - 90 g/m2
Paper type: Plain paper, recycled paper and colored paper
Paper sizes .....................................A3 - A5R/11" x 17" - 5 1/2" x 8 1/2"
Power source..................................Electrically connected to the copier
Dimensions .....................................368 (W) x 53 (D) x 180 (H) mm
14 1/2" (W) x 2 1/16" (D) x 7 1/16" (H)
Weight.............................................Approx. 0.65 kg/1.43 lbs

2C9
1-1-3
1-1-2 Parts names
(1) Copier
Figure 1-1-1
1. Original cover
2. Copy storage section
3. Operation panel
4. Drawer
5. Width guide
6. Length guide
7. Left cover handle
8. Bypass tray
9. Support guide
10. Slider
11. Contact glass
12. Original size indicator plate
13. Left cover
14. Waste toner box
15. Toner container release lever
16. Toner container
17. Cleaner rod
18. Front cover
19. Power switch

2C9
1-1-4
(2) Operation panel
Metric
Inch
Figure 1-1-2
1. Start key (Indicator)
2. Stop/Clear key
3. Reset key
4. Numeric keys
5. Energy Saver key (Indicator)
6. Interrupt key (Indicator)
7. Management key
8. Auto Exposure key
9. Copy exposure adjustment keys (Indicators)
10. Eco-copy key
11. Image mode selection key
12. Program key
13. Copy quantity/magnification display
14. Zoom (+) key
15. Zoom (-) key
16. Recall%/Enter key
17. Magnification Select key
18. Paper Select key
19. Paper supply indicator
20. Paper supply level indicator
21. Paper jam indicator
22. Bypass tray indicator
23. Original size Select key
24. Toner recovery indicator
25. Toner supply indicator
26. Memory overflow indicator
27. Maintenance indicator
28. Auto Selection key
29. Aggregate copy key
30. Duplex copy key
31. Divided key
32. Sort key
33. Border lightening key
34. Margin key
35. Printer type selection key

2C9
1-1-5
1-1-3 Machine cross section
Figure 1-1-3 Machine cross section
Light path
Paper path
1. Paper feed section
2. Optical section
3. Drum section
4. Developing section
5. Transfer and separation section
6. Fixing section
7. Exit and switchback section
8. Duplex section

2C9
1-1-6
1-1-4 Drive system
Figure 1-1-4
1. Drive motor gear
2. Gear 122
3. Registration gear 51
4. Registration motor gear
5. Gear 32
6. Gear 25
7. Gear 25
8. Gear 20
9. Paper feed clutch gear
10. Gear 30
11. Gear 31
12. Gear 25
13. Gear 49
14. Gear 30/23
15. Developing gear 25
16. Developing gear 26
17. Fixing joint gear 29
18. Gear 40
19. Gear 40
20. Gear 88/34
21. Gear 40
22. Fixing joint gear 40
23. Coupling gear
24. Gear 50
25. Gear 60
26. Exit motor gear
27. Gear 43/20