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LED Page Printer Service Manual
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Service Guide OKIPAGE16n
Chapter 0 About This Manual
OKIPAGE 16n LED Page Printer
Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 09/17/97
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 view on most displays well.
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 Guide OKIPAGE16n
0 About This Manual Front Cover 1 Configuration 1.1 System Configuration 1.2 Printer Configuration 1.3 Optional Configuration 1.4 Specification 1.5 Safety Standards ....1.5.2 Warning Label 2 Operation Description 2. OPERATION DESCRIPTION 2.1 Main Control Board (BOARD-COM) 2.2 Power Supply Board 2.3 Relay/Driver Board (AOLC board) 2.4 Electrophotographic Process ....2.4.1 Electrophotographic process mechanism ....2.4.2 Electrophotographic process ....2.4.3 Process operation descriptions 2.5 Paper Jam Detection 2.6 Cover Open 2.7 Toner Low Detection 2.8 Stacker-full Detection 2.9 Page Size Detection 2.10 PostScript Board (BOARD-PSBA) Optional 3 Parts Replacement 3. PARTS REPLACEMENT 3.1 Precautions for Parts Replacement 3.2 Parts Layout 3.3 How to Change Parts ....3.3.1 Rear cover, side cover (L) Assembly, face-up stacker Assembly, and I/F cover Assembly. ....3.3.2 Contact Assembly ....3.3.3 DC fan motor ....3.3.4 Manual feed hopper Assembly ....3.3.5 Side cover (R) (operator panel Assembly) ....3.3.6 Earth plate BK (R) (BOARD-PSBA, BOARD-COM) ....3.3.7 Stacker cover Assembly, damper arm, and washer ....3.3.8 Damper ....3.3.9 Stacker full sensor Assembly ....3.3.10 Cable cover (cable guides A and B) ....3.3.11 Eject roller Assembly ....3.3.12 Paper supply guide D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
Table of Contents ....3.3.13 Separator F ....3.3.14 Front feeder roller Assy ....3.3.15 Hopping motor ....3.3.16 Front feeder paper end sensor ....3.3.17 Main chassis unit ....3.3.18 Registration roller ....3.3.19 Drum motor ....3.3.20 Idle gear ....3.3.21 Fusing Assembly ....3.3.22 Fuser pressure roller ....3.3.23 EP lock shaft ....3.3.24 Hopping roller Assembly ....3.3.25 Outlet sensor lever ....3.3.26 Toner sensor lever ....3.2.27 Paper sensor lever ....3.3.28 Inlet sensor lever ....3.3.29 Power Supply Board / Insulator ....3.3.30 Paper end lever ....3.3.31 Guide rail (L) Assembly ....3.3.32 Guide rail (R) Assembly ....3.3.33 Cover Frame ....3.3.34 LED head ....3.3.35 Separator Assembly ....3.3.36 Transfer roller 4 Adjustment 4. ADJUSTMENT 4.1 Maintenance Modes And Functions ....4.1.1 User maintenance mode ....4.1.1 User maintenance mode menu system ....4.1.2 System maintenance mode ....4.1.3 Engine maintenance mode ....4.1.4 EEPROM initialization 4.2 Adjustment When Replacing A Part ....4.2.1 Setting of LED head drive time ....4.2.2 Resetting the fuser counter ....4.2.3 Destination setting 5 Periodical Maintenance 5.1 Periodic Part Replacement 5.2 Cleaning ....5.2.1 Cleaning of LED lens array 6 Troubleshooting Procedures 6.1 Troubleshooting Tips 6.2 Points to Check before Correcting Image Problems 6.3 Tips for Correcting Image Problems
Page 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
Table of Contents 6.4 Preparation for Troubleshooting ....Operator Panel Display 6.5 Troubleshooting Flow ....6.5.1 LCD Status Message/Trouble List ....6.5.2 LCD message troubleshooting ........1 The printer does not work normally after being turned on. ........2 [JAM error] ............2-1 Paper input jam (1st tray) ............2 - 2 Paper input jam (front feeder) ............2 - 3 Paper feed jam ............2-4 Paper exit jam ........3 Paper size error ........4 Fuser unit error (ERROR 71), (ERROR 72), (ERROR 73) ........5 I/F time-out between printer and optional tray (ERROR 81) ........6 I/F time-out occurs between the printer and the operator panel (ERROR 80) . ........7 Communication with the host cannot be performed via the parallel interface ........8 Data cannot be received through the OKI HSP interface ........9 Synchronous serial I/O error (ERROR 74) ....6.5.3 Image troubleshooting ........1 Image are light or blurred ........2 Dark background density ........3 Black paper is output ........4 Black belts or stripes in the vertical direction ........5 Cyclic error ........6 Print voids ........7 Poor fusing ........8 White belts or streaks in the vertical direction ........9 Snowy print of high density pattern ........10 Blotchy faded print 7 Wiring Diagram 7.1 Interconnect Signal Diagram 7.2 PCB Layout 7.3 Resistance Check Program/Font ROM Location 8 Parts List 8. PARTS LIST Printer Unit (Figure 8-1) Main Chassis Unit (Figure 8-2) 1 of 2 Main Chassis Unit (Figure 8-2) 2 of 2
Page 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
Table of Contents Front Feeder Unit (Figure 8-3) Base Unit (Figure 8-4) A Centronics Parallel Interface Appendix A: Centronics Parallel Interface B High Capacity Second Paper Feeder Preface 1. Outline ....1.1 Functions ....1.2 External View and Component Names 2. Mechanism Description ....2.1 General Mechanism ....2.2 Hopper Mechanism 3. Parts Replacement ....3.1 Precautions Concerning Parts Replacement ....3.2 Parts Layout ....3.3 Parts Replacement Methods ........3.3.1 Idle rollers ........3.3.2 AOLT-PCB ........3.3.3 Hopping motor ........3.3.4 Feed roller ........3.3.5 Hopping roller rubber ........3.3.6 Side frame (L) assy ........3.3.7 Side frame (R) assy ....4. TROUBLESHOOTING ........4.1 Precautions Prior to the Troubleshooting ........4.2 Preparations for the Troubleshooting ........4.3 Troubleshooting Method ............4.3.1 LCD Status Message List ............4.3.2 Troubleshooting Flow ....5. Connect Diagram ........5.1 Interconnection Diagram ........5.2 PCB Layout ....6. Parts List C Multi Feeder Maintenance Preface 1. Outline ....1.1 Functions ....1.2 External View and Component Names 2. Mechanism Description ....2.1 General Mechanism ....2.2 Hopper Mechanism 3. Parts Replacement ....3.1 Precautions Concerning Parts Replacement ....3.2 Parts Layout
Page 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
Table of Contents ....3.3 Parts Replacement Methods ........3.3.1 Separator ........3.3.2 AOLE-PCB ........3.3.3 Square-shaped connector ........3.3.4 Hopping Motor ........3.3.5 Planet gear ........3.3.6 Roller B ........3.3.7 Roller A ........3.3.8 Mini pitch belt & Feed roller 4. Troubleshooting ....4.1 Precautions Prior to Troubleshooting ....4.2 Preparations for Troubleshooting ....4.3 Troubleshooting Method ........4.3.1 LCD Status Message List ........4.3.2 Troubleshooting Flow 5. Connection Diagram ....5.1 Interconnection Diagram 5.2 PCB Layout 6. Parts List D Localtalk Serial Interface (OKIPAGE16n/PS Only) Localtalk Serial Interface (OKIPAGE 16n/PS Only)
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.1 System Configuration OKIPAGE16n / OKIPAGE16n/PS consists of control and engine blocks as the standard configuration (See Figure 1-1.) In addition, the following options are also available.
Figure 1-1
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.2 Printer Configuration The printer unit consists of the following hardware components:
Electrophotographic processor Paper feeder Controller Operator panel Power Supply board
Figure 1-2 shows the printer unit configuration.
Figure 1-2 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)
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.3 Optional Configuration The options below are available for use with OKIPAGE16n / OKIPAGE16n/PS. They are sold separately from the printer unit. (1) Multi-Purpose Feeder
(2) High Capacity Second Paper Feeder
(3) RAM module (72 pin SIMM, 1 MB/2 MB/4 MB/8 MB/16 MB/32 MB)
16 MB RAM module
8 MB RAM module
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.4 Specification (1) Type (2) External dimensions (excludes protruding Portion) (3) Weight (4) Development method Exposure method Desk top Height 10.6" (270 mm) Width 14.4" (366 mm) Depth 16.9" (430 mm) 15.2 kg (33.5 lbs) Dry electrophotography LED stationary head
(5) Paper used Standard paper - Xerox 4200 (20 lbs)
Application paper (manual face-up feed) - Label - Envelope - OHP paper (Transparency)
Standard sizes - Letter - Legal - Executive - Envelope - A4 - A5 - B5 - A6
Applicable sizes - Width: 3.4" to 8.5" (86 to 216 mm) - Length: 5.5" to 14" (140 to 355.6 mm) - Automatic feed: - Manual feed:
16 to 28 lbs (60 to 105 g/m 2 ) Label, OHP paper (transparency) Envelope
(6) Printing speed Continuous print: Warm-up time:
First print: 10 sec. 16 sheets/min. 90 sec. [at room temperature 77°F (25°C) and rated voltage (120 VAC)] Automatic feed or manual feed Face down/face up 600 x 600 dots/inch 120 VAC + 5.5%, -15% 230/240 VAC + 10%, -14% Peak: Approx. 600W Typical Operation: Approx. 220W Idle: Approx. 100W Power save mode: Approx. 20W
(7) Paper feed method (8) Paper delivery method (9) Resolution (10) Power input
(11) Power consumption
(12) Temperature and humidity In operation 50 - 90 (10 - 32) Humidity 20 - 80 Maximum wet bulb 77 temperature (25) Minimum difference 35.6 of wet and dry bulb (2) temperature Temperature Power off mode 32 - 110 (0 - 43) 10 - 90 80.4 (26.8) 35.6 (2) During Storage 14 - 110 (-10 - 43) 10 - 90 ______ ______ Unit Degree F Degree C %RH Degree F Degree C Degree F Degree C
Temperature 50 - 90 32 - 110 14 - 110 °F In operation Power off mode During Storage Unit Maximum wet bulb temperature Minimum difference of wet and dry bulb temperatures Humidity 35.6 35.6 °F 77 80.4 °F (10 - 32) (0 - 43) (10 - 43) (°C) 20 - 80 10 - 90 10 - 90 %RH (25) (26.8) (°C) (2) (2) (°C) 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 At standby: Power save mode: (14) Consumables
During operation: 50 dB (A) or less 45 dB (A) or less 43 dB (A) or less Toner cartridge kit 5,000 (5% duty) Image drum cartridge 30,000 (at continuous printing) 18,000 (3 page/job) 11,000 (1 page/job)
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.5 Safety Standards 1.5.1 Certification Label The safety certification label is affixed to the printer in the position below.
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Service Guide OKIPAGE16n
Chapter 1 Configuration
1.5.2 Warning Label The warning label is affixed to the portion which may cause bodily injury. Follow the instructions on warning labels during maintenance.
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2. OPERATION DESCRIPTION OKIPAGE16n / OKIPAGE16n/PS consists of a main control board, a power supply board, a driver board, an operator panel and an electrophotographic process mechanism. The control board receives data through a host I/F, decodes and edits the data, and stores the edited data in 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 the LED head in units of one dot line. The electrophotographic process mechanism prints data on paper. The operator panel is used for operations and status display. Fig. 2-1 shows an OKIPAGE16n / OKIPAGE16n/PS block diagram.
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.1 Main Control Board (BOARD-COM) The control board consists of an one chip CPU, LSIs, program/font ROM's, DRAM's, 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, 32-MHz clock) that incorporates an RISC CPU and its peripheral devices, and has the following functions. Built-in device Chip select controller Bus controller DRAM controller DRAM controller Parallel interface controller Timer Serial I/O port I/O port Option I/O interface (2) Program/font ROM's The program/font ROM's store the HP IV emulation program and various types of font. MASK ROM is used as the program/font ROM's. (3) DRAM's 2-Megabyte DRAM (4 Mbit DRAM x 4) is mounted as resident memory to be used for storing the program and providing various buffers. This DRAM is expandable up to 66 Mbytes by adding expansion memory (SIMMs). This DRAM provides the areas shown in the following table. Function Control of ROM, DRAM and I/O device
Transfer of image data from DRAM to OST LSI Control of Centronics parallel interface Generation of various control timing Monitoring of paper running and paper size Control of operator panel, EEPROM, and options Inputting/outputting of sensor, signal and motor signal Control of OKI HSP interface
Memory area System area Raster buffer Receive buffer Page buffer
Use Working area used for the program Stores converted bit image data Stores temporarily the data received from the host interface Adds print information to the analyzed receive data and stores the resulted data. Stores soft fonts and macro data.
MENU Fixed Enable Enable -
Memory capacity setting Expansion RAM Fixed Expandable Expandable Expandable
DLL/macro buffer
-
Expandable
Font cache buffer
Stores bit map fonts generated by the font rasterizer based on scalable font information
Enable
Expandable
(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.) Adjustment parameters (LED head drive time, print start position, etc.)
(5) LSI (MBCE31701-040FP-BND) This LSI is used as a peripheral device of the CPU and performs smoothing compensation (OST) of print image data. In addition, it transfers serially bit image data for each dot line to the LED head. (6) Host interface This printer has the following interfaces to the host.
Centronics bi-directional parallel interface OKI HSP interface (Option) LocalTalk interface (Option - PostScript Version)
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 A) (b) OKI HSP interface (Option) This interface (slot) is an OKI unique universal interface that provides the platform to connect various boards (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 board without modifying the program at the printer side. The conceptual diagram of the OKI HSP interface is shown in Fig. 2-2.
(7) RAM module
Pin layout Basic specification - Type: 72 pins SIMM (32 bits buss width) - Access time: 60ns, 70ns, 80ns, 100ns - Capacity: 1, 2, 4, 8, 16 or 32MB - Parity: None
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.2 Power Supply Board The power supply 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 +30 V +8 V -8 V
Use Logic circuit supply voltage Motor and fan drive voltage and source voltage for high-voltage supply Reset circuit Local Talk Line voltage
(2) High voltage power supply circuit This circuit generates the following voltages necessary for electrophotographic 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. Output CH DB SB TR CB Voltage -1.30 KV -240 V/+300 V -360 V/450 V +4 KV/-1.3 kV +400 V Use Remarks Voltage applied to charging roller Voltage applied to developing roller Voltage applied to toner supply roller Voltage applied to transfer roller Voltage applied to cleaning roller Remarks
Variable
(3) Photosensor The photosensor mounted on this power supply board supervises the paper running state during printing.
Sensor Inlet sensor 1
Inlet sensor 2 Paper sensor Outlet sensor
Function Detects the leading part of the paper and gives the supervision timing for switching from hopping operation to feeding operation. Supervises the paper running state and the paper size according to the paper reach time and running time. Detects the form width.
Sensing state ON: Paper exists. OFF: No paper exists.
Paper end sensor Toner low sensor
ON: A4 or larger OFF: Smaller than A4 Detects the leading part of the paper. ON: Paper exists. Supervises the paper running state. OFF: No paper exists. Supervises the paper feed and size according to ON: Paper exists. the time of arrival to the sensor and the time of OFF: No paper exists. passage of paper. Detect the end of the paper. ON: Paper exists. OFF: No paper exists. Detects the lack of toner. ON long: Toner low exists OFF short: No Toner low exists
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.3 Relay/Driver Board (AOLC board) This board relays signals between the Control board and the Power supply board and includes the registration motor and drum motor driver IC.
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.4 Electrophotographic Process 2.4.1 Electrophotographic process mechanism (see 2.4.2 Electrophotographic process (see 2.4.3 Process operation description (see ). ). ).
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.4.1 Electrophotographic process mechanism This mechanism prints image data from the control board on the paper by electrophotographic process. The Figure 2-4 shows the layout of the electrophotographic 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) Registration 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 registration roller. (4) Drum motor This drum motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the control board and is the main motor of this mechanism. (5) LED head Image data for each dot line from the control board is received by the shift register and latch register. The 4992 LEDs are driven to radiate the image data to the image drum. (6) Fuser The fuser consists of a heater, a heat roller, a thermistor and a thermostat. An AC voltage from the power supply board is applied to the heater under the control of the HEATON signal from the control board. This AC voltage heats the heater. The control board supervises the heat roller temperature via the thermistor, and regulates the heater roller at a predetermined temperature (185 ~ 188°C) by connecting or disconnecting the AC voltage supply to the heater. If the heater roller temperature rises abnormally, the thermostat of the heater voltage supply circuit is activated to cut the AC voltage supply immediately. 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)
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.4.2 Electrophotographic process The electrophotographic processing is outlined below. Figure 2-5 shows the electrophotographic printing process. 1 Charging The surface of the image drum is uniformly charged with negative charges by applying a negative voltage to the charge roller. 2 Exposure Light emitted from the LED head irradiates the negatively charged surface of the image drum. The surface potential of the irradiated part of the image drum surface is lowered, so that an electrostatic latent image associated with the print image is formed. 3 Developing and toner recovery When the negatively charged toner is brought into contact with the image drum, it is attracted to the electrostatic latent image by static electricity, making the image visible. At the same time, the residual toner on the image drum is attracted to the developing roller by static electricity. 4 Transfer When paper is placed over the image drum surface and a positive charge, opposite in polarity to the toner, is applied to the reverse side of the paper from the transfer roller, the toner is attracted by the positive charge and is transferred to the paper. As a result, the toner image formed on the image drum is transferred to the paper. 5 Temporary cleaning Residual toner that remains on the image drum without being transferred is made uniform by the cleaning roller and is temporarily attracted to the cleaning roller by static electricity. 6 Fusing The toner image transferred to the paper is fused under heat and pressure. Figure 2-6 shows an electrophotographic process timing chart.
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.4.3 Process operation descriptions (1) Hopping Feeding from the first tray and the front feeder are effected by a single hopping motor in the mechanism shown below.
Turning the Hopping motor in the "a" direction drives the hopping roller of the first tray. Turning the Hopping motor in the "b" direction drives the Hopping roller of the front feeder. Both hopping gears contain one-way bearings, so that turning each of these gears in reverse direction will not be transmitted to the corresponding roller.
(a) Hopping (1st tray) 1. Rotating the pulse motor in the direction a (clockwise [CW] direction) drives the hopping roller of the first tray to advance the paper until the inlet sensor turns on. At the same time, the one-way clutch gear B also rotates. However, the hopping roller of the front feeder will not rotate due to the one-way bearing. 2. After turning on the inlet sensor, the paper advances further by a predetermined length until it hits the registration roller. (The skew of the paper can thus be corrected.)
(b) Hopping (front feeder) 1. Rotating the pulse motor in the direction b (counterclockwise [CCW] direction) drives the hopping roller of the front feeder to advance the paper until the inlet sensor turns on. At the same time, the one-way clutch gear A also rotates. However, the hopping roller of the 1st tray will not rotate due to the one-way bearing. A cam to push down the front feeder plate is attached on each of the ends of the hopping roller shaft. These cams push down the front feeder plate when the hopping operation is not performed so as to facilitate the setting of paper into the tray. A microswitch is provided under the front feeder plate to detect that the front feeder plate is at the lower position. When the front feeder plate is at the lower position, this microswitch causes the motor to stop.
2.
After turning on the inlet sensor, the paper advances further by a predetermined length until it hits the registration roller. (The skew of the paper can thus be corrected.)
(2) Feeding After the end of hopping, the pulse motor dedicated for driving the registration roller rotates to drive the registration roller. The driven registration roller advances the paper until it comes out of the registration roller. When the leading edge of the paper causes the paper sensor to turn on, the printing is started synchronously. (3) Charging Charging is effected by applying a DC minus voltage to the charge roller that is in contact with the image drum surface.
(4) Exposure Light emitted from the LED head irradiates the image drum surface with negative charges. The surface potential of the irradiated part of the image drum drops, thereby forming an electrostatic latent image associated with the image signal.
(5) Developing Toner is attracted to the electrostatic latent image on the image drum surface to convert it into a visible toner image. Developing takes place at the contact between the image drum and the developing roller. 1. 1 As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated between the developing roller and the toner, allowing the toner to be attracted to the developing roller. (The developing roller surface is charged positive and the toner, negative.)
2.
The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin coat of toner on the developing roller surface. Toner is attracted to the exposed part (low-potential part) of the image drum at the contact between the image drum and the developing roller, making the electrostatic latent image visible.
3.
(6) Transfer The transfer roller is composed of conductive sponge material and is designed to make the image drum surface and the paper closely into contact. Paper is placed over the image drum surface, and a positive charge, opposite in polarity to the toner, is applied to the paper from its reverse side. The application of a high positive voltage from the power supply to the transfer roller causes the positive charge induced to the transfer roller surface to be transferred to the paper at the contact between the transfer roller and the paper. As a results, toner charged negative that is attracted to the image drum surface is transferred to the upper side of the paper by the positive charge on the lower side of the paper.
(7) Fusing After the end of the transfer, the unfused toner image is fused on the paper under heat and pressure as it passes between the heater roller and the backup roller. The heater roller with a Teflon coating incorporates a 400W heater (Halogen lamp), which heats the heat roller. A thermistor which is in contact with the heater roller regulates the heater roller at a predetermined temperature (about 185 ~ 188°C). A safety thermostat cuts off voltage supply to the heater by opening the thermostat in the event of abnormal temperature rises. The backup roller is held under a pressure of 2.5 kg from the pressure spring at each side.
(8) Cleaning After the end of the transfer, residual toner on the image drum is attracted to the cleaning roller temporarily by static electricity to clean the image drum surface.
(9) Cleaning of rollers The charge roller, transfer roller and cleaning roller are cleaned in the following cases:
In warming up at power-on time In warming up after the cover is opened and closed
When the number of accumulated sheets is 10 or more and the printout operation ends Changes in bias voltage applied to each roller move adhesive toner from the roller to the image drum and return it to the developer.
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Service Guide OKIPAGE16n
Chapter 2 Operation Description
2.5 Paper Jam Detection The paper jam detection function supervises the paper state at power-on time and during printing. In the event that the following state occurs, this function interrupts the printing process. If any of the following errors is presented, recovery printing will be performed by removing the jammed paper (namely by opening the upper cover, removing the jammed paper and closing the upper cover). Error Paper input jam Cause of error - At power-on time, the paper is placed at the inlet sensor. - After hopping operation is attempted three times, the leading part of the paper does not reach the inlet sensor. - At power-on time, the paper is placed at the paper sensor. - The leading part of the paper does not reach the paper sensor within a predetermined distance after the paper has reached the inlet sensor. - The trailing part of the paper does not pass over the paper sensor within a predetermined distance after the leading edge of the paper has passed over the paper sensor. - The leading part of paper does not reach the outlet sensor within a predetermined distance after the paper has reached the paper sensor. - At power-on time, the paper is placed on the outlet sensor. - The paper does not pass over the outlet sensor within a predetermined time after the leading part of the paper has reached the outlet sensor. - The paper size check with the manual feed specified considers the reference size as free size. - The size of the paper is supervised by the inlet sensors 1. It is detected that the paper does not pass over the inlet sensor 1 within predetermined range of distance. - The inlet sensor 2 detects that the size of the loaded paper is A4 or larger, or smaller than A4. The detected paper size differs from the paper size set by command or menu. - The paper size check with the manual feed specified considers the reference size as free size.
Paper feed jam
Paper exit jam
Paper size error
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Chapter 2 Operation Description
2.6 Cover Open When the stacker cover is opened, the cover open microswitch on the power supply board is turned off to cut the supply of +30V to the high voltage power supply circuit. As a result, all high-voltage outputs are interrupted. At the same time, the CVOPN signal is sent to the control board to notify it of the off state of the microswitch, and the control board performs the cover open processing. 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)
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Chapter 2 Operation Description
2.7 Toner Low Detection
Composition The device consists of the stirring gear which rotates at a constant rate, the stirring bar and the magnet on the stirring bar. The stirring bar rotates through the link on the protrusion in the stirring gear.
Operation
Toner Low is detected by monitoring the time interval of the encounter of the magnet set on the sensor lever and the magnet on the stirring bar.
Operation during toner full state
The stirring bar rotates due to the interlocking with the stirring gear. Even when the magnet on the stirring bar reaches the maximum height, since the other side is being dipped in the toner, the stirring bar is pushed by the stirring gear.
Operation during toner low state
When the stirring bar reaches the maximum height, since there is no resistance provided by the toner on the other side, it falls to the minimum height due to its own weight. Because of this, the time interval during which it encounters the magnet of the sensor lever becomes long. By monitoring this time interval, toner low can be detected.
When the toner low state is detected 2 times consecutively, Toner Low is established. When the toner full state is detected 2 times consecutively, Toner Low is canceled. When there is no change with the toner sensor for 2 cycles (3.398 sec. x 2) or more, then the Toner Sensor Alarm is activated. The toner sensor is not monitored while the drum motor is stopped.
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Chapter 2 Operation Description
2.8 Stacker-full Detection The sensor (interlocked with the lever) at the paper outlet to the stacker detects a stacker-full state (about 250 sheets) and stops printing of the ensuing pages. 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)
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Chapter 2 Operation Description
2.9 Page Size Detection The four tab pieces are driven according to the setting position of the paper guide through the cam interlocked with the paper guide of the paper cassette. When the paper cassette is inserted into the printer, the state of the tab pieces is detected by the microswitch to recognize the paper size. STATE OF MICROSWITCHES SW2 SW1 0 1 0 1 0 0 1 1 1 0 1 1 1 1 1 0
SW3 1 0 1 1 1 0 0 0
SW4 1 1 1 0 1 1 0 1
Paper size Letter Executive A4 Legal 14 Legal 13 B5 A5 A6
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Chapter 2 Operation Description
2.10 PostScript Board (BOARD-PSBA) Optional The PostScript board consists of program/font ROM's, an EEPROM, and a LocalTalk interface control circuit. (1) Program/font ROM's The program/font ROM's store the PostScript Level II program and its fonts. MASK ROM is used as the program/font ROM's. (2) EEPROM The EEPROM has a 4-kbit capacity and stores the PostScript's menu settings. (3) LocalTalk interface control circuit AppleTalk protocol data is received from the host system via LocalTalk interface. The LocalTalk interface control circuit consists of a CPU, a program ROM, a SRAM, and a driver/receiver IC. 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)
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Chapter 3 Parts Replacement
3. PARTS REPLACEMENT The section explains the procedures for replacement of parts, assemblies, and units in the field. Only the removal procedures are explained here. Reverse the procedure for the installation. 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)
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Chapter 3 Parts Replacement
3.1 Precautions for Parts Replacement (1) Before starting parts replacement, remove the AC cable and interface cable. (a) Remove the AC cable in the following procedure: i) Turn off ("o") the power switch of the printer ii) Disconnect the AC inlet plug of the AC cable from the AC receptacle. iii) Disconnect the AC cable and interface cable from the printer. (b) Reconnect the printer in the following procedure. i) Connect the AC cable and interface cable to the printer. ii) Connect the AC inlet plug to the AC receptacle. iii) Turn on ("l") the power switch of the printer. ## (2) Do not try disassembly as long as the printer is operating normally. (3) Do not remove unnecessary parts: try to keep disassembly to a minimum. (4) Use specified service tools. (5) When disassembling, follow the determined sequence. Otherwise, parts may be damaged. (6) Since screws, collars and other small parts are likely to be lost, they should temporarily be attached to the orginal positions. (7) When handling ICs such as microprocessors, ROM and RAM, and circuit boards, do not wear gloves that are likely to generate static electricity. (8) Do not place printed circuit boards directly on the equipment or floor. [Service Tools] Table 3-1 shows the tools required for field replacement of printed circuit boards and units. Table 3-1 Service Tools XX
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Chapter 3 Parts Replacement
3.2 Parts Layout
Figure 3-2
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Chapter 3 Parts Replacement
3.3 How to Change Parts This section explains how to change parts and assemblies appearing in the disassembly diagram below.
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Chapter 3 Parts Replacement
3.3.1 Rear cover, side cover (L) Assembly, face-up stacker Assembly, and I/F cover Assembly. (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the interface cable 1. Remove drum/toner Assembly (see picture below) and store in black plastic bag shipped w/printer. (3) Open the face-up stacker Assembly 8. Disconnect the engagement at the left and right protrusions 8A . Remove the face-up stacker Assembly 8. (Flex the Assembly 8 in the middle to disengage 8A from the Rear cover 0.) (4) Open the stacker cover 2 and the manual feed hopper Assembly3. Remove three screws 4. Remove the side cover (L) Assembly 5. (5) Remove two screws 6. Remove the I/F cover Assembly 7. (6) Remove two screws 9 and four claws A. (Use a small flat blade screw driver to "pop" claws.) Remove the rear cover 10.
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Chapter 3 Parts Replacement
3.3.2 Contact Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the side cover (L) Assembly (see 3.3.1 (1) to (4)). (3) Remove two screws 1. Remove the contact plate (cover) 2 and the contact Assembly 3. Pull bottom of Assembly 3 out first, then the top of Assembly. Remove fan connector cables from location 4. Caution: Be careful not to deform the electrodes of the contact Assembly when removing the contact Assembly.
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Chapter 3 Parts Replacement
3.3.3 DC fan motor (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the side cover (L) Assembly (see 3.3.1 (1) to (4)). (3) Unplug the connector of the DC fan motor 1 and remove the DC fan motor 1.
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Chapter 3 Parts Replacement
3.3.4 Manual feed hopper Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Open manual feed hopper Assembly 1. Disengage the lower portion of this Assembly. (3) Hold manual feed hopper Assembly 1 vertically and remove the left and right levers 2 with a downward motion.
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Chapter 3 Parts Replacement
3.3.5 Side cover (R) (operator panel Assembly) (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove interface cable 1. (3) Open stacker cover 2. Remove two screws 3. Remove I/F cover Assembly 4. (4) Remove two screws 5 and flexible cable 6 (use care to not damage flexible cable). Remove operator panel Assembly 7. (5) Open manual feed hopper Assembly 8. Remove three screws 9 and then remove side cover (R) 10.
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Chapter 3 Parts Replacement
3.3.6 Earth plate BK (R) (BOARD-PSBA, BOARD-COM) (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove side cover (R) (see 3.3.5). (3) Remove a screw 1. Remove BOARD-PSBA 2. (OKIPAGE16n/PS only) (4) Remove five screws 3 and seven connectors 4. Remove BOARD-COM 5. (5) Remove two screws 6 Remove IC card cover 7. (6) Remove four screws 8. Remove side plate (R) 9, by pulling up and out on top part of plate. (7) Remove the claws and then remove Earth plate BK (R) 10.
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Chapter 3 Parts Replacement
3.3.7 Stacker cover Assembly, damper arm, and washer (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the rear cover (see 3.3.1). (3) Remove the side cover (R) (see 3.3.5). (4) Remove the side plate (R) (see 3.3.6 (1) to (6)). (5) Disconnect the engagement of backup release lever 1 with the protrusion on the light side surface on the right side of the stacker cover. (6) Remove screw 2 and washer 3. Remove two claws. Remove stacker cover Assembly 4 (at this time, the damper arm 5 is also removed).
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Chapter 3 Parts Replacement
3.3.8 Damper (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the damper arm (see 3.3.7). (3) Remove two screws 1 and then remove two dampers 2.
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Chapter 3 Parts Replacement
3.3.9 Stacker full sensor Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the stacker cover Assembly (see 3.3.7). (3) Remove four screw 1. Remove stacker mount 2 by releasing the tabs at position 2A . (4) Remove stacker full sensor Assembly 3 by releasing spreading the plastic tabs on each side of sensor Assembly 3 and lifting switch from cover.
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Chapter 3 Parts Replacement
3.3.10 Cable cover (cable guides A and B) (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the stacker cover Assembly (see 3.3.7 ).
(3) Remove two screws 1 release tabs at position 1A . Remove cable cover 2, cable guide A 3.
Note: Use care when replacing cable cover. Do not pinch, crimp, or cut cables or protective sheet.
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Chapter 3 Parts Replacement
3.3.11 Eject roller Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the rear cover (see 3.3.1 ). ). ). ).
(3) Remove the side cover (R) (see 3.3.5
(4) Remove the side plate (R) (see 3.3.6 (1) to (6) (5) Remove the stacker cover Assembly (see 3.3.7
(6) Release the latch on the right side of eject roller Assembly 1. Lift up and remove the eject roller Assembly.
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Chapter 3 Parts Replacement
3.3.12 Paper supply guide D (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the side cover (R) (see 3.3.5). (3) Remove five screws 1. Lift up and remove front feeder roller Assembly 2. (4) Lift up and remove paper supply guide D 3. (At this time, two bias rollers 4 and bias spring 5 are also removed. Be careful not to lose them.)
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Chapter 3 Parts Replacement
3.3.13 Separator F (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the manual feed hopper Assembly (see 3.3.4 (3) Remove the side cover (R) (see 3.3.5 ). ) . Make a diagram of wire locations ).
(4) Remove the front feeder Assembly (see 3.3.12 steps (1) to (3) and routing.
(5) Remove two screws 1 and then remove the inner cover 2. At this time, the cover lock lever 3 and the torsion spring 4 are also removed, note position of torsion spring. (6) Remove two screws 5 and then remove square-shaped connector 6. (7) Using a dedicated tool, remove the connector of switch Assembly 7 from square-shaped connector 6. (8) Turn idle gear 8 in the direction of arrow A until front feeder plate 9 is elevated. (9) Remove front feeder gear = and then remove two springs (F) A. Be careful not to lose the springs. (10) Remove four screws B and then remove paper supply guide A C. (At this time, front feeder earth plate D G H are also removed.) (11) Remove front feeder plate 9 by releasing the engagement at two parts 9A . Switch Assembly 7 may now be removed. (12) Pull up separator E toward you and then release two mounting posts at 15A to remove the separator. (At this time, two springs F are also removed simultaneously. Be careful not to lose the springs.) (13) Release two clutches on paper supply guide C and pull out switch Assembly 7 upward. Switch Assembly 7 should be moved more towards the center of the paper path. During Re-assembly use great care: do not pinch, crimp, or cut wires to switch Assembly 7.
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3.3.14 Front feeder roller Assy (1) Turn the AC power supply switch off. Unplug the AC power cord from the outlet. (2) Remove the manual feed hopper Assy (see 3.3.4 . (3) Remove the side cover (R) (see 3.3.5 ). . . ).
(4) Remove the front feeder roller Assy (see 3.3.12 (1) to (3) (5) Remove the paper supply guide A (see 3.3.13 (1) to (10))
(6) Remove idle gear 1 and then remove the right side front feeder cam 2, release lever (R) 3, and spring 4. (At this time, knock pin 5 and bearing F 6 are also removed. Be careful not to lose them.) Do not mix these parts with those from the left side of Assy. (7) Pull out the front feeder shaft 7 toward the left and then remove front feeder roller Assy 8. (8) Remove knock pin 9 and then remove front feeder cam = on the left (L) side, release lever (L) A, and spring B. (At this time, the bearing F C on the left (L) side is also removed.) Do not mix these parts with those from the right side of Assy.
Note: 1: Hopping roller orientation when removed from shaft. 2: Be sure sensor arm swings freely after re-assembly. 3: Be sure that during re-assembly both feeder cams (2 and =) are facing the same direction. 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)
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Chapter 3 Parts Replacement
3.3.15 Hopping motor (1) Turn the AC power switch off. Unplug the AC power cable from the outlet. (2) Remove the manual feed hopper Assembly (see 3.3.4 (3) Remove the side cover (R) (see 3.3.5 ). ). ). ).
(4) Remove the front feeder Assembly (see 3.3.12.(1) to (3)
(5) Remove the inner cover and square-shaped connector (see 3.3.13.(5) and (6)
(6) Using a dedicated tool, remove the connector of hopping motor 1 from the square-shaped connector. (7) Remove the paper supply guide A (see 3.3.13. (7) to (10) (8) Remove the lever (R) (see 3.3.10. (6) ). ).
(9) Remove two screws 2 and then remove side plate (R) Assembly 3. (10) Remove two screws 4 and then remove hopping motor 1.
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Chapter 3 Parts Replacement
3.3.16 Front feeder paper end sensor (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the manual feed hopper Assembly (see 3.3.4 (3) Remove the side cover (R) (see 3.3.5 ). ). ).
(4) Remove the front feeder roller Assembly (see 3.3.12. (1) to (3) (5) Remove the side plate (R) Assembly (see 3.3.15. (1) to (9) ).
(6) Using a dedicated tool, remove the connector of front feeder paper end sensor 1 from the square-shaped connector. (7) Remove two screws 2 and then remove paper supply guide C 3. (8) Remove paper supply guide B 4. (9) Remove four claws and then remove front feeder paper end sensor 1. (10) Remove two screws 5 and then remove square-shaped connector 6 from paper supply guide C 3. (11) Using a dedicated tool, remove the connector cord 7 from the square-shaped connector.
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3.3.17 Main chassis unit (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the rear cover (see 3.3.1 ). ).
(3) Remove the contact Assembly (see 3.3.2 (4) Remove the side cover (R) (see 3.3.5 ).
(5) Remove the side plate (R) (see 3.3.6 (1) to (6) (6) Remove the stacker cover Assembly (see 3.3.7
). ).
). (7) Remove the front feeder roller Assembly (see 3.3.12, (1) to (3) At this time, it is not required to remove the manual feed hopper Assembly. (8) Remove the earth plate (HP). (9) Lift gear (TR) 1 to unlock it. Remove gear (TR) 1 and transfer roller 2. (At this time, two bearings (TR) 3 and two transfer springs 4 are also removed.) Do not lose bearings or springs. (10) Remove connector cover 5 in direction of arrow and then remove four connectors 6 and 7. (11) Remove the DC Fan motor. (12) Remove eight screws = and then remove main chassis unit A.
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3.3.18 Registration roller (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the front feeder roller Assembly (see 3.3.12. (1) to (3) ).
(3) Remove four screws 1. Lift and remove the registration roller Assembly 2, left side first then right side. (4) Release the latch and remove registration roller gear 3 and pressure roller gear 4. (5) Remove left and right side registration roller bearing Assemblies 5 and then remove resist roller 6 and pressure roller 7.
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Chapter 3 Parts Replacement
3.3.19 Drum motor (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ). ).
(3) Remove the registration roller Assembly (see 3.3.18 (1) to (3) (4) Remove fuser Assembly.
(5) Release the latch of fuser pressure roller release lever 1 and pull out it toward the right. (At this time, idle gear H 2 is also removed.) (6) Remove spring 3 and then remove pressure release lever 4. Be careful, do not lose or damage spring. (7) Remove EP lock spring 5 and then remove ED lock lever 6. (8) Release two latches and remove motor Assembly 7. (9) Remove two screws 8 and then remove drum motor 9 and heat sink. (10) Remove two screws = and then remove registration motor A.
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Chapter 3 Parts Replacement
3.3.20 Idle gear (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ). ).
(3) Remove the motor Assembly (see 3.3.19 (1) to (8)
(4) Remove three screws 1 and then remove motor bracket B 2. (5) Remove idler gear E 3, idle gear D 4, idle gear B 5, idle gear C 6, idle gear A 7, and two resist idle gears 8.
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Chapter 3 Parts Replacement
3.3.21 Fusing Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the side cover (L) Assembly (see 3.3.1 (1) to (3) (3) Unplug connector 1. (4) Remove four screws 2 and then remove fusing Assembly 3. ).
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Chapter 3 Parts Replacement
3.3.22 Fuser pressure roller (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 (3) Remove the fusing Assembly (see 3.3.21 ). ). ).
(4) Remove the fuser pressure roller release lever (see 3.3.19 (5)
(5) Remove two screws 2 and release three locks on the fusing guide. Remove the fusing guide 1 by pushing it upward from the lower side. (6) Release the engagement with earth plate L (BK) 3. Lift and remove fuser pressure roller 4. (At this time, two fuser pressure roller bearings 5 and two bias springs 6 are also removed.)
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3.3.23 EP lock shaft (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Remove screw 1. Turn EP lock level (L) Assembly 2 in the direction of arrow A . (4) Remove spring 3. (5) Drop EP lock shaft 4 down and turn in the direction of arrows B and remove it.
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3.3.24 Hopping roller Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Release the latch. Remove hopping roller gear 1 and bearing P 2. Then, remove idle gear HF 3. (4) Remove the left side of hopping roller shaft 4 from the groove. Pull out hopping roller shaft 4 and hopping roller Assembly 5 toward the left.. (5) Release the latch and remove bearing L 6. (6) Release the latch and remove hopping roller Assembly 5. (At this time, knock pin 7 is also removed. Be careful not to lose the knock pin.)
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3.3.25 Outlet sensor lever (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Press the clamp part of outlet sensor lever 1. Remove the outlet sensor lever 1 by pushing it upward from the lower side.
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3.3.26 Toner sensor lever (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Squeeze the clamp part of toner sensor lever 1 and remove the toner sensor lever 1 by pushing it upward from the lower side.
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.2.27 Paper sensor lever (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Squeeze the clamp part of the paper sensor lever 1. Remove the paper sensor lever 1 by pushing it upward from the lower side.
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)
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.28 Inlet sensor lever (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Squeeze the clamp part of two inlet sensor levers 1. Remove the inlet sensor levers 1 by pushing them downward.
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)
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.29 Power Supply Board / Insulator (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Remove two screws 1 and then remove inlet holder 2. At this time, remove inlet 3 from inlet holder 2. (4) Remove eight screws 4, connector 5, and two screws 6. Remove Power Supply Board 7 together with AOLC-PCB 8. (5) Unplug connector 9 and remove PowerSupply Board 7. (6) Remove insulator 10. Caution: Be careful not to deform the paper end lever A.
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)
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.30 Paper end lever (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 ).
(3) Release the lock and remove paper end lever 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)
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.31 Guide rail (L) Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 (3) Remove the insulator (see 3.3.29 ). ).
(4) Remove screw 1 and then remove base plate 2. (5) Remove two screws 3 and then remove guide rail (L) Assembly 4. (6) Remove cassette lock spring 5 and then remove bias link 6 and pull block 7. (Pay attention the direction of hook of cassette lock spring 5.) (7) Remove spring 8 and then remove cassette stopper 9. (8) Remove screw 0 from bias link 6 and then remove link support A.
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)
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Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.32 Guide rail (R) Assembly (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove the main chassis unit (see 3.3.17 (3) Remove the insulator (see 3.3.29 ). ).
(4) Remove screw 1 and then remove base plate 2. (5) Remove two screws 3 and then remove guide rail (R) Assembly 4. (6) Remove cassette lock spring 5 and then remove bias link 6 and pull block 7 (At this time, earth plate 8 is also removed.) (Pay attention the direction of hook of cassette lock spring 5.) (7) Remove spring 9 and then remove cassette stopper =. (8) Remove screw A and then remove detector spring B. (9) Remove screw C and then remove AOLS-PCB D. (10) Remove screws E from bias link 6 and then remove link support F. (11) Remove two screws G and then remove square cord from square-shaped connector H. (12) Using a dedicated tool, remove connector cord I from square-shaped connector H.
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Page: 58
Service Guide OKIPAGE16n
Chapter 3 Parts Replacement
3.3.33 Cover Frame (1) Turn the AC power switch off. Unplug the AC power cord from the outlet. (2) Remove interface cable 1. (3) Open stacker cover 2. Remove two screws 3 and then remove Cover Frame 4.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partn