Okidata OKIPAGE 20, OKIPAGE 20DX, OKIPAGE 20DXn Service Manual
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Page: 1
Service Manual - OKIPAGE20
Chapter 0 Introduction
OKIPAGE 20 / OKIPAGE 20 DX / OKIPAGE 20 DXn
LED PAGE PRINTER PRODUCTS
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
03/20/98
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with
the pictures rendered at 300 dpi, which is ideal for printing, but does not display well
on most displays.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Table of Contents Page
Service Manual - OKIPAGE20
0 Introduction
Copyright 1
Preface 2
1 Configuration
1.1 System Configuration 3
1.2 Printer Configuration 4
1.3 Optional Configuration 5
1.4 Specification 6
1.5 Safety Standards 7
....1.5.1 Certification Label 8
....1.5.2 Warning label 9
2 Operation Description
2.0 Operation Description 10
2.1 Main Control Board (BOARD-AAA) 11
2.2 Power Supply Unit 12
2.3 Electro-photographic Process 13
....2.3.1 Electro-photographic process mechanism 14
....2.3.2 Electro-photographic process 15
....2.3.3 Process operation descriptions 16
....2.3.4 Revision of LED Head Illumination 17
2.4 Paper Jam Detection 18
2.5 Cover Open 19
2.6 Toner Low Detection 20
2.7 Stacker-full Detection 21
2.8 Paper Size Detection 22
2.9 PostScript ROM module (BOARD-MSM or BOARD-FSL) 23
3 Parts Replacement
3.0 Parts Replacement 24
3.1 Precautions for Parts Replacements 25
3.2 Parts Layout 26
3.3 How to Change Parts 27
....3.3.1 Face -up Stacker Assy 28
....3.3.2 Contact Assy 29
....3.3.3 DC Fan Motor 30
....3.3.4 OP Panel Assy 31
....3.3.5 Board-AAA 32
....3.3.6 Stacker Assy, Damper Arm, Cover Rear 33
....3.3.7 Sensor Stacker Full 34
....3.3.8 Cable cover (guide film) 35
....3.3.9 Damper 36
....3.3.10 Feeder Unit-Front 37
....3.3.11 Roller Assy-Regist 38
Table of Contents Page
....3.3.12 Motor -Main 39
....3.3.13 Guide Assy-Eject 40
....3.3.14 Heat Assy 41
....3.3.15 Roller feed (C) 42
....3.3.16 Roller Assy-BK 43
....3.3.17 Roller Assy-Feed 44
....3.3.18 LED Head 45
....3.3.19 Paper cassette, ROLLER Ass-Feed,
ROLLER-Assy-Hopping
....3.3.20 Frame Assy-Separation 47
....3.3.21 Transfer Roller/TR Gear/TR Bearing 48
....3.3.22 EP lock shaft 49
....3.3.23 LEVER Assy- Out Sensor 50
....3.3.24 Toner sensor lever 51
....3.3.25 Paper sensor lever 52
....3.3.26 Inlet sensor lever 53
....3.3.27 Power supply unit 54
....3.3.28 Lever-Paper end & Lever-Paper near end 55
....3.3.29 Guide Assy-Cassette (L) 56
....3.3.30 Guide Assy-Cassette (R) 57
4 Adjustment
4.0 Adjustment 58
....4.1 Maintenance Mode and Functions 59
........User maintenance mode 60
........System maintenance mode 61
........Engine maintenance mode 62
........4.1.1 User maintenance mode 63
........4.1.2 System maintenance mode 64
........4.1.3 Engine maintenance mode 65
........4.1.4 EEPROM Initialization 66
....4.2 Adjustment When Replacing a Part 67
........4.2.1 Resetting the fuser counter 68
........4.2.2 Destination setting 69
5 Periodic Maintenance
5.1 Period Replacing Part 70
5.2 Cleaning 71
....5.2.1 Cleaning of LED lens array 72
....5.2.2 Cleaning the Plastic Film 73
6 Troubleshooting Procedures
6.1 Troubleshooting Tips 74
6.2 Points to Check before Correcting Image Problems 75
6.3 Tips for Correcting Image Problems 76
6.4 Preparation for Troubleshooting 77
6.5 Troubleshooting Flow 78
46
Table of Contents Page
....6.5.1 LCD status message/trouble list 79
....6.5.2 LCD message troubleshooting 80
....6.5.3 Image troubleshooting 81
7 Wiring Diagram
7.1 Interconnect Signal Diagram 82
7.2 PCB Layout 83
7.3 Resistance Check 84
7.4 Program/Font ROM Location 85
8 Parts List
Figure 8-1 Printer Unit 86
Table 8-1 Printer Unit 87
Figure 8-2 Frame-Main Unit 88
Table 8-2 Frame-Main Unit 89
Figure 8-3 Base Unit 90
Table 8-3 Base Unit 91
A Centronics Parallel Interface
Centronics Parallel Interface 92
B RS-232C Serial Interface
RS-232C Serial Interface 93
C Duplex Unit
1. OUTLINE 94
....1.1 Functions 95
....1.2 External View and Component Names 96
2.0 Mechanism Description 97
....2.1 General Mechanism 98
....2.2 JAM Release Mechanism 99
....2.3 Removing/Installing Duplex Unit 100
3.0 Parts Replacement 101
....3.1 Precautions Concerning Parts Replacement 102
....3.2 Parts Layout 103
....3.3 Parts Replacement Methods 104
........3.3.1 Board-LEX 105
........3.3.2 Connector (IMSA-9714N-14A) 106
........3.3.3 Photo Sensor 107
........3.3.4 SOLENOID Assy 108
........3.3.5 Motor 109
4.0 Troubleshooting 110
....4.1 Precautions Prior to the Troubleshooting 111
....4.2 Preparations for the Troubleshooting 112
....4.3 Troubleshooting Method 113
........4.3.1 LCD Status Message List 114
........4.3.2 Troubleshooting Flow 115
5.0 Connection Diagram 116
....5.1 Interconnection Diagram 117
Table of Contents Page
....5.2 PCB Layout 118
6.0 Parts List 119
Table 6-1 Duplex Unit 120
D Second / Third Paper Feeder
1.0 Outline 121
....1.1 Functions 122
....Appearance and Parts Name 123
2.0 Description of operation 124
....2.1 Driving Mechanism 125
....2.2 Hopper Mechanism 126
3.0 Parts Replacement 127
....3.1 Precautions Concerning Parts Replacement 128
....3.2 Parts Layout 129
....3.3 Parts Replacement Methods 130
........3.3.1 Roller assy hopping, Roller assy feed 131
........3.3.2 Cover front assy 132
........3.3.3 Board-BBB 133
........3.3.4 Lever paper end, Lever paper near end 134
........3.3.5 Motor 135
........3.3.6 Connector (IMSA-9714N-14B), Connector
(IMSA-9714N-14A)
........3.3.7 Frange pulley, pulley Idle, Mini pitch belt, Plate Earth
shaft, Gear double, Tray switch assy
........3.3.8 Roller feed 138
........3.3.9 Bracket sub roller 139
........3.3.10 Frame side (L) assy 140
........3.3.11 Frame side (R) assy 141
4.0 Troubleshooting 142
....4.1 Precautions Prior to the Troubleshooting 143
....4.2 Preparations for the Troubleshooting 144
....4.3 Troubleshooting Method 145
........4.3.1 LCD Status Message List 146
........4.3.2 Troubleshooting Flow 147
5.0 Connection Diagram 148
....5.1 Interconnection Diagram 149
....5.2 PCB Layout 150
6.0 Parts List 151
E Multi-Feeder
1.0 Outline 152
....1.1 Functions 153
....1.2 External View and Component Names 154
2.0 Mechanism Description 155
....2.1 General Mechanism 156
....2.2 Hopper Mechanism 157
136
137
Table of Contents Page
3.0 Parts Replacement 158
....3.1 Precautions Concerning Parts Replacement 159
....3.2 Parts Layout 160
....3.3 Parts Replacement Methods 161
........3.3.1 Separator 162
........3.3.2 AOLE-PCB 163
........3.3.3 Square-shaped connector 164
........3.3.4 Hopping Motor 165
........3.3.5 Planet gear 166
........3.3.6 Roller B 167
........3.3.7 Roller A 168
........3.3.8 Mini pitch belt & Feed roller 169
4.0 Troubleshooting 170
....4.1 Precautions Prior to the Troubleshooting 171
....4.2 Preparations for the Troubleshooting 172
....4.3 Troubleshooting Method 173
........4.3.1 LCD Status Message List 174
........4.3.2 Troubleshooting Flow 175
5.0 Connection Diagram 176
....5.1 Interconnection Diagram 177
....5.2 PCB Layout 178
@6.0 Parts List 179
Page: 1
Service Manual - OKIPAGE20
Chapter 0 Introduction
All specifications are subject to change without notice.
PostScript, Adobe and the PostScript logo are trademarks of Adobe Systems Incorporated, registered in
the U.S.A.
*Times, Helvetica and Palatino are trademarks of Linotype AG and/or its subsidiaries.
ITC Avant Garde Gothic, ITC Zapf Chancery, ITC Zapf Dingbats and ITC Bookman are registered
trademarks of International Typeface Corporation.
HP and LaserJet are registered trademarks of Hewlett-Packard Company.
Diablo 630 is a registered trademark of Xerox Corporation.
AppleTalk is a registered trademark of Apple Computer, Inc.
LocalTalk is a trademark of Apple Computer, Inc.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 2
Service Manual - OKIPAGE20
Chapter 0 Introduction
This Service Handbook describes the field maintenance procedures for the OKIPAGE20/20n and 20DX.
This handbook was written for use by maintenance personnel. Note, however, that the user should refer to
the USER'S MANUAL for operating instructions for the equipment.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 3
Service Manual - OKIPAGE20
Chapter 1 Configuration
The OKIPAGE20 Series printers consist of control and engine blocks as the standard configuration (See
Figure 1-1.)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Service Manual - OKIPAGE20
Chapter 1 Configuration
The printer unit consists of the following hardware components:
Electro-photographic processor
Paper feeder
Controller
Operator panel
Power/sensor board
Figure 1-2 shows the printer unit configuration.
Page: 4
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Service Manual - OKIPAGE20
Chapter 1 Configuration
The options below are available for use with the OKIPAGE20 Series Printer. They are sold
separately from the printer unit.
(1) Multi Feeder
(2) Second / Third Paper Feeder
Page: 5
(3) DUPLEX Unit
(4) Flash ROM module (72 pin SIMM, 4MB/8MB)
(5) PostScript ROM module (72pin SIMM)
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
(1) Type Desktop
Page: 6
Service Manual - OKIPAGE20
Chapter 1 Configuration
(2) External dimensions (excludes
protruding portion)
Height 13.0" (331 mm)
Width 14.4" (336 mm)
Depth 18.2" (378 mm)
(3) Weight 42 lbs. (19 kg) If Installed Duplex 47 lbs. (21.3 kg)
(4) Developing method
Exposing method
Dry electrophotography
LED stationary head
(5) Paper used <Type>
Standard paper
- Xerox 4200 (20 lbs.)
Application paper (manual face-up feed)
- Label
- Envelope
- OHP paper (transparency)
<Size>
Standard sizes
- Letter
- Legal
- Legal-13
- Executive
- COM-10
- Monarch
- DL
- C5
- COM-9
- A4
- A5
- B5 (JIS)
- A6
Applicable sizes
- Width: 3.4" to 8.5" (86 to 216 mm)
- Length: 5.5" to 14" (140 to 355.6 mm)
<Thickness>
- Automatic feed: 16 to 28 lbs. (60 to 105 g/m
2
)
- Manual feed: label, OHP paper (transparency)
Envelope, 16-36 lb.
(6) Printing speed First print: 8 sec.
Continuous printing: 20 sheets/min. [at duplex print: 10
sheet/min.]
Warm-up time: 90 seconds, [at room temperature 77o F
o
C), and rated voltage (120 VAC)]
(25
(7) Paper feeding method Automatic feed or manual feed
(8) Paper delivery method Face down/face up
(9) Resolution 600 x 600 dots/inch
600 x 1200 dots/inch
(10) Power input 120 VAC + 5.5%, -15% (ODA)
230V + 10%
(11) Power consumption Peak: Approx. 820W
Typical: Approx. 350W
Idle: Approx. 95W
Power save mode: Approx. 25W
(12) Temperature and humidity
In operation Power off mode During Storage Unit
Temperature 50-90
(10-32)
32-110
(0-43)
14-110
(-10-43)
Humidity 2-80 10-90 10-90 %RH
Maximum wet bulb
temperature
Minimum
difference between
77
(25)
35.6
(2)
80.4
(26.8)
35.6
(2)
--------------
________
o
F
o
C)
(
o
F
o
C)
(
o
F
o
C)
(
wet and dry bulb
temperature
Notes:
1. Storage conditions specified above apply to printers in packed condition.
2. Temperature and humidity must be in the range where no condensation occurs.
(13) Noise During operation: 50 dBA or less (without second tray)
55 dBA or less (with second tray)
At standby: 45 dBA or less
Power save mode: 43 dBA or less
(14) Consumables Toner cartridge kit 5,000 (5% duty)*
Image drum cartridge 30,000 at continuous printing*
19,000 (3 page/job) (Simplex printing)*
*Simplex printing without Power Save.
10,000 (1 page/job)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 7
Service Manual - OKIPAGE20
Chapter 1 Configuration
1.5.1 Certification label
1.5.2 Warning label
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Service Manual - OKIPAGE20
Chapter 1 Configuration
The safety certification label is affixed to the printer in the position below.
Page: 8
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 9
Service Manual - OKIPAGE20
Chapter 1 Configuration
he warning label is affixed to the portion which may cause an injury to human body. Follow the instructions
on warning labels during maintenance.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 10
Service Manual - OKIPAGE20
Chapter 2 Operation Description
The OKIPAGE20 Series Printers consist of a main control board, a power supply unit (120V/230V), a
power supply unit (high voltage), an operator panel and an electro-photographic process mechanism.
The control board receives data through a host I/F, decodes and edits the data, and stores the edited data
in a memory. After completing edition of one page of data, it references the font memory and generates bit
data on the same memory. At the same time, it transfers the bit image data to an LED head in units of one
dot line.
The electro-photographic process mechanism prints data on paper.
The operator panel is used for operations and status display.
Fig. 2-1 shows an OKIPAGE20 Series Printer block diagram.
Figure 2-1 OKIPAGE 20 Series Printer block diagram
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Page: 11
Service Manual - OKIPAGE20
Chapter 2 Operation Description
The control board consists of an one chip CPU, a LSI program/font ROMs, four DRAMs, an EEPROM, a
host interface circuit, and a mechanism driving circuit.
(1) One-chip CPU
The one-chip CPU is a custom CPU (32-bit internal bus, 32-bit external bus, 40-MHz clock, that
incorporates and RISC CPU and its peripheral devices, and has the following functions.
Built-in device
Chip select controller
Bus controller
DRAM controller
DMA controller Transfer of data from Host I/F to RAM
Serial interface controller Control of RS-232C serial interface
Parallel interface controller Control of Centronics parallel interface
Timer Generation of various control timing
Serial I/O Port Control of serial interface between controller and operator panel,
I/O Port Input and output of sensor and motor signals.
Motor driver controller Control of Main Motor
Compression/extension circuit Compressed frame buffer is produced by compressing the data
Function
Control of peripheral LSI, ROM, RAM and I/O device
Monitoring of paper running and paper size
EEPROM Control of a serial interface between controller and
power supply board.
Outputting of various control signals
of temporary band buffer.
Extension printing operation is executed by extending the data
of compressed frame buffer.
(2) Program and Font ROMs
The program/font ROM's store the HP LJ5 emulation program and various types of font. MASK ROM is
used as the program/font ROM's.
(3) DRAM's
4-Megabyte DRAM (16 Mbit DRAM x 2) is mounted as resident memory to be used for storing
the program and providing various buffers. This DRAM is expandable up to 68 Mbytes by
adding expansion memory (SIMMs). This DRAM provides the areas shown in the following
table.
Memory capacity setting
Memory area Use MENU Expansion RAM
System area Working area used for the program Fixed Fixed
Raster buffer Stores converted bit image data Enable Expandable
Receive buffer Stores temporarily the data received from
Enable Expandable
the host interface
Page buffer Adds print information to the analyzed
-- Expandable
receive data and stores the resulted data.
DLL/macro buffer Stores soft fonts and macro data -- Expandable
Font cache buffer Stores bit map fonts generated by the font
Enable Expandable
rasterizer based on scalable font
information
(4) EEPROM
The EEPROM has a 1-kbit capacity and stores the following data:
Menu data
Various counter data (page counter, drum counter, fuser counter, etc)
Adjusting parameters (LED head drive time, print start position, etc)
(5) LSI (LZ9FF22)
Built in device
Function
Serial I/O port Control of serial interface between controller and 2nd tray, 3rd tray, Multi-purpose feeder
Control of serial interface between controller and Duplex unit
Motor driver controller Control of Hopping motor
I/O port Inputting of various sensor signals
Output of various control signals
(6) Host interface
Centronics bi-directional parallel interface
RS232C interface
OKI HSP interface (Option)
The single effective interface or the automatic interface select mode can be selected using the menu. If
the busy state of the printer continues for a long time period, the buffer near-full control releases the busy
status at constant intervals even if the host side is busy so not to cause the interface time-out at the host
side.
(a) Centronics bi-directional parallel interface
This is an interface conforming to IEEE-1284 and provides either of unidirectional and bi-directional
communications according to each of the following communication modes.
Compatibility mode - Unidirectional communications from the host to the printer.
Nibble mode - This mode transmits 4-bit wide data from the printer to the host. In this mode, each
1-byte data is transferred in the form of two nibbles using ERROR, BUSY, FAULT, and SELECT
signal leads. This mode can provide the bi-directional operation in combination with the compatibility
mode.
ECP mode - This mode provides the asynchronous bi-directional interface and transmits and receives
1-byte data using eight data signal leads under the semi-duplex control by the host.
When the power is turned on, the compatibility mode is automatically selected. The change to another
mode from the compatibility mode is made through negotiation. (When the BI DIRECTION is set to
ENABLE in the menu, this change can be performed.) (For the electrical/physical characteristics of this
interface, see APPENDIX B)
(b) RS232C serial interface
The following protocol is supported for the serial interface conforming to EIA RS232C.
READY/BUSY (DTR HI or DTR LO)
X-ON/X-OFF
RBST X-ON
(For the electrical/ physical characteristics of the interface, see APPENDIX B)
(c) OKI HSP interface (Option)
This interface (slot) is an OKI proprietary universal interface that provides the platform to connect various
boards (including those supplied by third party vendors) such as the LAN connection expansion board and
SCSI expansion board. Any expansion boards compatible with this interface can be mounted on the
Control board in the piggyback connector without modifying the program at the printer side. The
conceptual diagram of the OKI HSP interface is shown in Fig. 2-2. (For the electrical/physical
characteristics of the OKI HSP interface, see the OKI HSP interface technical manual.)
(7) RAM module
Pin layout
Basic specification
- Type: 72 pins Standard SIMM (32 bits buss width) [
- Access time: 60ns, 70ns, 80ns, 100ns
- Capacity: 4, 8, 16 or 32MB
- Parity: None
(8) Flash ROM module
Pin layout
Basic specification
- Type: 72 pins SIMM (32 bits buss width)
- Access time: 90ns
- Capacity: 4 or 8MB
(9) PS ROM module
PS ROM module is BOARD-MSM or BOARD-FSL
Note:
EDO SIMM type cannot be used.]
BOARD MSM consists of MASK ROM
BOARD FSL consists of Flash ROM (8MB).
Pin layout
Basic specification
- Type: 72 pins SIMM (32 bits buss width)
- Access time: 100ns (Board-MSM), 90n (Board-FSL)
- Capacity: 6MB (Board-MSM), 8MB (Board-FSL)
Emulation : PostScript Level 2
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Page: 12
Service Manual - OKIPAGE20
Chapter 2 Operation Description
The power supply/sensor board consists of an AC filter circuit, a low voltage power supply circuit, a high
voltage power supply circuit, heater drive circuit, and photosensors.
(1) Low Voltage Power Supply Circuit
This circuit generates the following voltages.
Output voltage
+5 V Logic circuit supply voltage
+30 V Motor and fan drive voltage and source voltage for high-voltage supply
+8 V Reset circuit, RS232C Line voltage
-8 V RS232C Line voltage
+3.8V LED head supply voltage
(2) High Voltage Power Supply Circuit
This circuit generates the following voltages necessary for electrophotographic process from +30 V,
according to the control sequence from the main control board. When cover open state is detected, +30 V
supply is automatically interrupted to stop the supply of all high-voltage outputs.
Output
Sub-CH -15 Microline Voltage applied to Sub charging roller
CH -1.3 KV Voltage applied to charging roller
DB -220V/+300V Voltage applied to developing roller
SB -450 V Voltage applied to toner supply roller
TR +4 KV/-1.3 kV Voltage applied to transfer roller Variable + only
CB +450 V/-1350V Voltage applied to cleaning roller
(3) Photosensor
The photosensor mounted on this power supply/sensor board monitors the status of paper being fed
through the printer during printing.
Voltage Use Remarks
Use
The sensor layout diagram is shown in Figure 2-2.
Sensor Function Sensing state
Inlet sensor 1 Detects the leading part of the paper and gives
the monitor timing for switching from hopping
operation to feeding operation. Monitors paper
feeding situation and paper size based on the
paper arrival time and running time.
Inlet sensor 2 Detects the paper width ON: A4 or larger
ON: Paper exists.
OFF: No paper exists.
OFF: Small than A4
Paper sensor Detects the leading portion of the paper. Monitors
the paper feeding situation.
Outlet sensor Monitors the paper feeding and size according to
the time of arrival to and leaving the past the
sensor.
Paper and sensor Detects the end of the paper. ON: Paper exits.
Toner low sensor Detects the lack of toner. - - - - -
-----The power supply unit consists of an AC filter circuit, a low voltage power supply circuit, a high
voltage power supply circuit, heater drive circuit, and photosensors.
(1) Low voltage power supply circuit
This circuit generates the following voltages.
ON: Paper exists.
OFF: No paper exists.
ON: Paper exists.
OFF: No paper exists.
OFF: No paper exists.
(2) High voltage power supply circuit
This circuit generates the following voltages necessary for electro-photographic processing
from +30 V according to the control sequence from the control board. When cover open state
is detected, +30 V supply is automatically interrupted to stop the supply of all the high-voltage
outputs.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 13
Service Manual - OKIPAGE20
Chapter 2 Operation Description
2.3.1 Electro-photographic process mechanism
2.3.2 Electro-photographic process
2.3.3 Process operation descriptions
2.3.4 Revision of LED Head Illumination
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 14
Service Manual - OKIPAGE20
Chapter 2 Operation Description
This mechanism prints image data from the control board on the paper by electro-photographic process.
The Figure 2-4 shows the layout of the electro-photographic process mechanism.
(1) Image drum unit
The image drum unit consists of a sensitive drum, a charger, and a developer. The unit forms a toner
image on the sensitive drum, using a electrostatic latent image formed by the LED head.
(2) Hopping motor
This motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the control
board. It drives the hopping roller of the first tray and the front feed roller via two one-way clutches
according to the direction of rotation.
(3) Motor-Main
This motor is a pulse motor of 72 steps/rotation that is two-phase excited by the signal from the control
board and is the main motor of this mechanism.
(4) Clutch (for Roller-Regist)
(5) Clutch (for Feed Roller)
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