Okidata OKIPAGE 10ex Service Manual

Front Cover

Service Guide OKIPAGE 10ex

Chapter 0 Introduction

OKIPAGE 10ex

To propel your company into the future, you need technology that fits the way you work. You need the OKIPAGE® 10ex, the best-featured desktop printer in its class. This digital LED printer combines professional performance with excep-tional value, for years of high-quality documents and low ongoing operating costs.

Adobe Acrobat printable reference copy

of the OKIDATA Service Training Manual.

05/13/98

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.

Table of Contents Page

Service Guide OKIPAGE 10ex

0 Introduction

Introduction 1

1 Specifications

1.1 System Configuration 2

1.2 Printer Configuration 3

1.3 Optional Configuration 4

1.4 Specification 5

1.5 Safety Standards 6

....1.5.1 Certification Label 7

....1.5.2 Warning Label 8

....1.5.3 Warning/Caution Marking 9

2 Operation

Operation Description 10

2.1 Main Control Board 11

2.2 Power Supply/Sensor Board 12

2.3 Electrophotographic Process 13

....2.3.1 Electrophotographic Process Mechanism 14

....2.3.2 Electrophotographic 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

3 Disassembly

3.1 Precautions for Parts Replacement 21

3.2 Parts Layout - [Lower base unit] 22

........[Upper cover unit] 23

........[Base unit] 24

3.3 How to Change Parts 25

....3.3.1 Upper Cover Assy 26

....3.3.2 IC Card Cover 27

....3.3.3 LED Head 28

....3.3.4 Operator Panel Assy 29

....3.3.5 Lower Base Unit 30

....3.3.6 Pulse Motor Main/Drum 31

....3.3.7 Pulse Motor (Registration) 32

....3.3.8 Face Up Stacker Assy 33

....3.3.9 Hopping Roller Assy 34

....3.3.10 Motor Assy 35

....3.3.11 Hopping Roller Shaft Assy 36

....3.3.12 Stacker Cover Assy 37

....3.3.13 Registration Roller 38

....3.3.14 Transfer Roller Assy 39

....3.3.15 Fusing Unit 40

....3.3.16 Back-up Roller 41

....3.3.17 Sensor Plate (Inlet) 42

....3.3.18 Sensor Plate (Outlet) 43

....3.3.19 Manual Feed Guide Assy 44

....3.3.20 Sensor Plate (Paper Supply) 45

Table of Contents Page

....3.3.21 Main Control M5B-PCB 46

....3.3.22 Transformer 47

....3.3.23 Power Supply/Sensor Board and Contact Assy 48

....3.3.24 Cassette Guide L Assy 49

....3.3.25 Cassette Guide R 50

....3.3.26 Spacer Bearing (L/R) 51

4 Adjustments

4. Adjustment 52

4.1 Maintenance Modes and Functions 53

....4.1.1 User Maintenance Mode 54

....4.1.2 System Maintenance Mode 55

....4.1.3 Engine Maintenance Mode 56

....4.1.4 EEPROM Initialization 57

4.2 Adjustment When Replacing a Part 58

4.2.1 Setting of LED Head Drive Time 59

4.2.2 Uploading/Downloading EEPROM data 60

5 Maintenance

5.1 Periodical Replacement Parts 61

5.2 Cleaning 62

....5.2.1 Cleaning of LED Lens Array 63

....5.2.2 Cleaning Page Function 64

6 Troubleshooting

6.1 Troubleshooting Tips 65

6.2 Points to Check before Correcting Image Problems 66

6.3 Tips for Correcting Image Problems 67

6.4 Preparation for Troubleshooting 68

6.5 Troubleshooting Flow 69

....6.5.1 LCD Status Message/Problem List 70

....6.5.2 LCD Message Troubleshooting 71

........(1) The printer does not work normally after the power is

turned on.

........(2) [JAM error] 73

............Paper input jam 74

............Paper feed jam 75

............Paper exit jam 76

........(3) Paper size error 77

........(4) Fusing unit error (ERROR 71) (ERROR 72) (ERROR

73)

........(5) SSIO error (ERROR 74) 79

........(6) Fan error (ERROR 70) 80

....6.5.3 Image Troubleshooting 81

........(1) Images are light or blurred entirely 82

........(2) Dark background density 83

........(3) Blank paper is output 84

........(4) Black vertical belts or stripes 85

........(5) Cyclical defect 86

........(6) Prints voids 87

........(7) Poor fusing 88

........(8) Vertical belts or streaks 89

........Figure 6-4 90

Table of Contents Page

........Figure 6-5 91

7 Wiring Diagram

7.1 Interconnect Signal Diagram 92

7.2 PCB Layout and Connector Signal List 93

7.3 Resistance Check 94

7.4 Short Plug Setting 95

8 Parts List

Lower Base Unit 96 Upper Cover Unit 97 Base Unit 98

A Centronics Parallel

Centronics Parallel Interface 99

B Loop Test (RS-232C Interface)

Loop Test (RS-232C Interface) 100

C Diagnostics Test

1. Maintenance Modes 101

....1.1 User Maintenance Mode 102

....1.2 System Maintenance Mode 103

....1.3 Engine Maintenance Mode 104

....1.4 User Factory Set Operation 105

Product Accessory 1: RS-232C Serial Interface (Option)

RS-232C Serial Interface (Option) 106

Product Accessory 2: Multi-Purpose Feeder Maintenance

1. PREFACE 107

....1.1 Functions 108

....1.2 External View and Component Names 109

2. MECHANISM DESCRIPTION - General Mechanism 110

....2.2 Hopper Mechanism 111

3. PARTS REPLACEMENT 112

....3.1 Precautions Concerning Parts Replacement 113

....3.2 Parts Layout 114

....3.3 Parts Replacement Methods 115

........3.3.1 Link 116

........3.3.2 Separator 117

........3.3.3 OLEV-11 PCB 118

........3.3.4 Pulse Motor 119

........3.3.5 Planet Gear 120

........3.3.6 Roller-A and B 121

4. TROUBLESHOOTING - Precautions Prior to the Troubleshooting

....4.2 Preparations for the Troubleshooting 123

....4.3 Troubleshooting Method 124

........4.3.1 LCD Status Message List 125

5. CONNECTION DIAGRAM - Interconnection Diagram 126

....5.2 PCB Layout 127

6. PARTS LIST 128

Product Accessory 3: High Capacity 2nd Paper Feeder

High Capacity Second Paper Feeder Maintenance 129

....1. OUTLINE - Functions 130

....1.2 External View and Component Names 131

122

Table of Contents Page

2. MECHANISM DESCRIPTION - General Mechanism 132

....2.2 Hopper Mechanism 133

3. PARTS REPLACEMENT 134

....3.1 Precautions Concerning Parts Replacement 135

....3.2 Parts Layout 136

....3.3 Parts Replacement Methods 137

........3.3.1 Stepping Motor (Hopping) 138

........3.3.2 TQSB-2 PCB 139

........3.3.3 Hopping Roller Shaft Assembly and One-way Clutch

140

Gear

4. TROUBLESHOOTING - Precautions Prior to the

141 Troubleshooting

....4.2 Preparations for the Troubleshooting 142

....4.3 Troubleshooting Method 143

........4.3.1 LCD Status Message List 144

5. CONNECTION DIAGRAM 145

....5.1 Interconnection Diagram 146

....5.2 PCB Layout 147

6. PARTS LIST 148

....2nd Tray ASSEMBLY 149

....SECTION 1 CABINET & CASSETTE ASSEMBLY 150

....SECTION 2 MECHANICAL ASSEMBLY 151

....2nd Tray Parts List 152

Page: 1

Service Guide OKIPAGE 10ex

Chapter 0 Introduction

Introduction

This Service Handbook describes the field maintenance methods for OKIPAGE 10ex Digital LED Printer. This manual is written for use by the maintenance personnel. Please note that you should refer to the Printer Handbook and Printer Setup for the handling and operating methods of the equipment.

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.1 System Configuration

OKIPAGE 10ex consists of control and engine blocks in the standard configuration, as shown in Figure 1-1. In addition, the options marked with asterisk (*) are available.

Page: 2

Figure 1-1

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.2 Printer Configuration

The printer unit consists of the following hardware components:

Electrophotographic Processorl Paper Feederl Controllerl Operator Panell Power Supply Unitl

The printer unit configuration is shown in Figure 1-2.

Page: 3

Page: 4

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.3 Optional Configuration

The options shown below are available for use with OKIPAGE 10ex. These are available separately from the printer unit. (1) High Capacity Second Paper Feeder

(2) Multi-Purpose Feeder

(3) 1 MB Memory Expansion Board

(4) RS-232C Serial Interface Board

(5) DRAM SIMM Memory DRAM SIMM memory is available with memory of 1 MB (min.) to 32 MB (max.). The access time of SIMM memories are 60ns, 70ns, 80ns, and 100ns.

(6) Flash SIMM Flash SIMM is available with memory of 4 MB and 8 MB.

Service Guide OKIPAGE 10ex

1.4 Specification

(1) Type: Desktop (2) Outside dimensions Height: 7.9" (200 mm)

Width 13.0" (330 mm) Depth 15.6" (395mm)

(3) Weight 22 lbs. (10 kg)

Page: 5

Chapter 1 Specifications

(4) Development method

Exposure method

(5) Paper used <Type>

Dry electrophotography LED stationary head

Standard paperl

- Xerox 4200 (20 lbs) Application paper (manual face-up feed)l

- Label

- Envelope

- OHP paper (Transparency)

<Size>

Standardl

Letter Legal * [*Without Mutli-Purpose Feeder (Option)] Legal-13* Executive

-COM-10** [**manual feed and Multi-Purpose Feeder (Option)

only] Monarch** DL** C5** B5 (JIS) A6

Applicable sizesl

- Width: 3.87" x 8.5" (116 to 216 mm)

- Length: 5.83" to 14" (148 to 355.6 mm)

- Automatic feed: 16 to 28 lbs (60 to 135 g/m2)

- Manual feed: Label, OHP paper (transparency), Envelope (24 to

28 lbs.)

(6) Printing speed: First print: 12 seconds typical for the Letter size paper after

warm-up Continuous print: 10 pages per minute with Letter size paper. [Except Second Paper Feeder (8.8 PPM), Multi-Purpose Feeder (8.3 PPM)]

Warm-up time: 60 seconds typical at room temperature [68o F (20o

C), AC 120/230 V].(120 VAC for ODA, 230 VAC for OEL/INT) (7) Paper feeding method Automatic paper feed or manual paper feed (8) Paper delivery

Face down/face up

method

(9) Resolution 600 dpi x 600 dpi (true)

600 x 1200 dots/inch graphics (10) Power input 230 VAC +/-10%

120 VAC +/-15% for (11) Power consumption Peak: Approx. 460W

Typical operation: Approx. 215W

Idle: Approx. 61W

Power save mode: Approx. 18W (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 20-80 10-90 10-90 %RH Maximum wet bulb temperature

Minimum difference between wet and

77 (25)

35.6 (2)

80.4 (26.8)

35.6 (2)

-----

dry bulb

temperatures

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 dB (A) or less

Standby: 38 dB (A) or less Quite mode: Back ground level

(14) Consumables Toner cartridge kit - 2,000 (5% duty) ---- 45g cartridge kit

Image drum cartridge - 20,000 (at continuous printing); 14,000 (3 page/job) without Power Save

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.5 Safety Standards

1.5.1 Certification Label

1.5.2 Warning Label

1.5.3 Warning/Caution Marking

Page: 6

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.5.1 Certification Label

The safety certification label is affixed to the printer in the position described below.

Page: 7

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.5.2 Warning Label

The warning labels are affixed to the sections which may cause bodily injury. Follow the instructions on warning labels during maintenance.

Page: 8

Service Guide OKIPAGE 10ex

Chapter 1 Specifications

1.5.3 Warning/Caution Marking

The following warning and caution markings are made on the power supply/sensor board.

Page: 9

* No fuse is mounted here for 200V series. ENGLISH - Heatsink and transformer core present risk of electric shock. Test before touching. FRENCH - Le dissipateur thermique et le noyau du transformateur présentent des risques de choc électrique. Testez

avant de manipuler. SPANISH - Las disipadores de color el núcel del transformador pueden producir un choque eléctrico. Compruebe antes

de tocar. PORTUGUESE - O dissipador de calor e o núcleo do fransiormador apresentam risco de choque elétrico. Teste antes

de focar. ENGLISH - Circuits maybe live after fuses open. FRENCH - Il se peut que les circuits soient sous tension une fois que les fusibles ont éfé rerirés. SPANISH - Las circuitos pueden estar activos una vez que se hayan abierio los fusibles. PORTUGUESE - Os circuitos podem estar energizados após os fusiveis se queimarem.

Page: 10

Service Guide OKIPAGE 10ex

Chapter 2 Operation

Operation Description

OKIPAGE 10ex consists of a main control board, a power supply/sensor board, an operator panel, an electrophotographic process mechanism, and revision for illumination of LED head.

The main control board receives data via the host I/F, it then decodes, edits and stores the data in memory. After completing the editing of a single page of data, it references the font memory and generates bit image data, which is transferred to the LED head in one dot line units.

Through the electrophotographic process mechanism, the data is printed on the paper. The operator panel is used for operations and status display. OKIPAGE 10ex block diagram is shown in Figure 2-1.

Page: 11

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.1 Main Control Board

The main control board consists of a single chip CPU, two program/font ROMs, four DRAMs, an EEPROM, a host interface circuit, and a mechanism driving circuit.

(1) Single chip CPU

The single chip CPU is a custom CPU (32-bit internal bus, 32-bit external bus, 28.24-MHz clock, with input frequency from a 7.06-MHz clock) which incorporates the RISC CPU and its peripheral devices, and has the following functions:

Built-in Device Function

Chip select controller

Control of ROM, DRAM and I/O device. Bus controller DRAM controller DMA controller Transfer of image data from DRAM to video output port.

Parallel interface controller Control of Centronics parallel interface. Serial interface controller Control of RS-232C serial interface.

Video output port

Controls LED head. LED STB output port

Timer Generation of various control timing

Monitoring of paper running and paper size. I/O Port Input and output of sensor and motor signals.

(2) Program and Font ROMs

The Program and Font ROMs store the equipment program and various types of fonts. Mask ROM is used as Program and Font ROMs. The mounting locations of these Program and Font ROMs vary depending on the type of the ROMs.

(3) DRAM

The DRAM is a 2MB resident memory on the main control board that stores edited data, image data, DLL data and macro data.

(4) EEPROM

1,024-bit Electrically Erasable PROM (EEPROM), is loaded with the following kinds of data:

Menu datal Various counter data (page counter, drum counter)l Adjusting parameters (LED head drive time, print start position, paper feed length)l

(5) Parallel Interface

Parallel data is received from a host system via parallel interface which conforms to the IEEE 1284 specification.

Page: 12

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.2 Power Supply/Sensor Board

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 Application

+5 V Logic circuit supply voltage.

+38 V Motor and fan drive voltage and source voltage for high-voltage supply.

+ 8 V RS-232C line voltage.

- 8 V RS-232C line voltage and PS board supply voltage.

+ 3.3 V LED head supply voltage

(2) High Voltage Power Supply Circuit

This circuit generates the following voltages required for electrophotographic process from +5 V, according to the control sequence from the main control board. When cover open state is detected, +5 V supply is interrupted automatically to stop the supply of all high-voltage outputs.

Output Voltage Application

CH -1.3 KV Voltage to be applied to charge roller. DB -265 V/+300 V Voltage to be applied to a developing roller. SB -500 V/ 0 V Voltage to be applied to a sponge roller. CB +400 V/+3.5 KV Voltage to be applied to a cleaning roller. TR +500 V to +3.5 KV/-1100 V Voltage to be applied to a transfer roller. (Variable)

(3) Photosensor

The photosensor mounted on this power supply/sensor board monitors the status of paper being fed through the printer during printing.

The sensor layout diagram is shown in Figure 2-2 below.

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

ON: Paper exists.

OFF: No paper exists. 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.

OFF: Smaller than A4.

Paper sensor Detects the leading portion of the paper. Monitors

paper feeding situation.

Output sensor Monitors paper feeding and size according to the

time of arrival to and leaving past the sensor.

ON: Paper exists.

OFF: No paper exists.

ON: Paper exists.

OFF: No paper exists.

Toner sensor Detects the lack of toner. - - - - -

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.3 Electrophotographic Process

2.3.1 Electrophotographic Process Mechanism

2.3.2 Electrophotographic Process

2.3.3 Process Operation Descriptions

2.3.4 Revision of LED Head Illumination

Page: 13

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.3.1 Electrophotographic Process Mechanism

This mechanism actuates the printing of image data supplied by the main control board on the paper by electrophotographic process.

The layout of the electrophotographic process mechanism is shown in Figure 2-3.

Page: 14

(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) Registration Motor

The registration motor is a pulse motor of 48 steps/rotation with two-phase excitement by the signal from the main control board. It drives the hopping and registration rollers via two one-way clutches according to the direction of rotation.

(3) Main (Drum) Motor

The main or drum motor is a pulse motor of 48 steps/rotation with two-phase excitement by the signal from the main control board and is the main motor of this mechanism.

(4) LED Head

Image data for each dot line from the main control board is received by the shift register and latch register. The 4992 LED's are driven to radiate the image data on the image drum.

(5) Fuser

The fuser consists of a heater, a heat roller, a thermistor and a thermostat. The AC voltage from the power supply/sensor board is applied to the heater controlled by the HEATON signal from the

main control board. This AC voltage heats the heater. The main control board monitors the heat roller temperature via the thermistor, and regulates the heater roller to keep it at a designated temperature in the menu, depending on the thickness of the paper (tray 1&2: light=165°C, medium light=170°C, medium=175°C, medium heavy and heavy=195°C; manual feeding and power envelope feeder: light=175°C, medium light=180°C, medium=185°C, medium heavy=190°C, heavy=195°C, transparency = 160°C) by connecting or disconnecting the AC voltage supply to the heater.

When an abnormal rise of the heater roller temperature takes place, the thermostat of the heater voltage supply circuit becomes active and forcibly cuts the AC voltage supply.

The temperature setting of the fuser can be changed through operator panel setting.

Page: 15

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.3.2 Electrophotographic Process

The electrophotographic processing is outlined below. The electrophotographic printing process is shown in Figure 2-4 (see below).

1 Charging

The surface of the image drum is charged uniformly with a negative charge by applying the 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 portion of the image drum surface becomes lower, forming the electrostatic latent image associated with the print image.

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, the positive charge which is opposite in polarity to that of the toner, is applied to the reverse side of the paper by the transfer roller. The toner is attracted by the positive charge and is transferred onto the paper. This results in the transfer of the toner image formed on the image drum onto the paper.

5 Temporary cleaning

Residual toner which remains on the image drum without being transferred is evened out by the cleaning roller and is temporarily attracted to the cleaning roller by static electricity.

6 Fusing

The toner image transferred onto the paper is fused to the paper by heat and pressure. An electrophotographic process timing chart is shown in Figure 2-5 (see last chart below).

Figure 2-4

Figure 2-5

Service Guide OKIPAGE 10ex

Chapter 2 Operation

2.3.3 Process Operation Descriptions

(1) Hopping and Feeding Hopping and feeding motions are actuated by a single registration motor in the mechanism as shown below:

Page: 16

The registration motor turning in direction "a" drives the hopping roller. The registration motor turning in direction "b" drives the registration roller. The registration and hopping gears have one-way bearing, so turning any of these gears in the reverse direction will not transmit the motion to the corresponding roller.

(a) Hopping 1 For hopping, the registration motor turns in direction "a" (clockwise direction) and drives the hopping roller to advance

the paper until the inlet sensor turns on (in this case, the registration gear also turns, but the registration roller is prevented from turning by the one-way bearing).

2 After inlet sensor is turned on by the paper advance, the paper is further advanced to a predetermined distance until the paper hits the registration roller (the skew of the paper can thus be corrected).

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Okidata OKIPAGE 10ex Service Manual

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