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Facsimile Products Service Manual
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Service Guide OF2200/2400/2600
Chapter 0 About This Manual
OKIFAX 2200 // 2400 // 2600
Facsimile Products
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
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Service Guide OF2200/2400/2600
0 About This Manual Front Cover Copyright 1 Principles of Operation 1.1 Principles Of Operation ....1.1.01 Compatibility ....1.1.02 Communications Mode ....1.1.03 Modem Operation ....1.1.04 Automatic Fall-Back Mode ....1.1.05 Telephone Line Connection ....1.1.06 Error Correction Mode (ECM) ....1.1.07 Quick Scan Mode ....1.1.08 Major Assemblies (Mechanical) - Cross-Section Diagram ....1.1.09 Major Assemblies (Electrical) ........Okifax 2200 - Copy Function Block Diagram ........Okifax 2400/2600 - Copy Function Block Diagram ........Okifax 2200 - Report Print Function Block Diagram ........Okifax 2400/2600 - Report Print Function Block Diagram 1.2 Transmitter Theory Of Operation ........Okifax 2200 - 300 Bps Transmit Handshake Operation Diagram ........Okifax 2400/2600 - 300 Bps Transmit Handshake Operation Diagram ........Okifax 2200 - 300 Bps Receive Handshake Operation Diagram ........Okifax 2400/2600 - 300 Bps Receive Handshake Operation Diagram ........Okifax 2200 - G3 Transmit Functional Block Diagram ........Okifax 2400/2600 - G3 Transmit Functional Block Diagram ....1.2.02 Operator Panel Assembly (OPE) ....1.2.03 Automatic Document Feeder (ADF) ....1.2.04 Scanner Assembly ....1.2.05 Encoder ....1.2.06 Modem ....1.2.07 Network Control Unit (NCU) ....1.2.08 Line Interface Board 1.3 Receiver Theory Of Operation ........Okifax 2200 - G3 Receive Operation Block Diagram ........Okifax 2400/2600 - G3 Receive Operation Block Diagram 1.4 Led Printer - Principal Components 1.5 Printing Process - General Information ....1.5.02 The Full Printing Process 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
Table of Contents 1.6 Sensors And Switches ....Paper Inlet Jam ....Paper Feed Jam ....1.6.02 Toner Low Sensor 2 Failure Analysis 2.1 Overview 2.2 Troubleshooting Updates 2.3 Reporting Problems 2.4 Troubleshooting Tips 2.5 Repair Analysis Procedures ....2.5.02 RAP Index ....Start Here Flowchart ........RAP 01 No LCD Display ........RAP 02 Alarm Led Is Lit ........RAP 03 Print Test Failure ........RAP 04 Local Copy Problem ............Checking PC1 And PC2 ........RAP 05 Auto Dial Problem ........RAP 06 Data Transmission Problem ........RAP 07 Auto Reception Problem ........RAP 08 Reception Problem ........RAP 09 Scan Operation Test Failure ........RAP 10 LED Test Failure ........RAP 11 Tone Send Test Failure ........RAP 12 High Speed Modem Test Failure ........RAP 13 Multi-Frequency Send Test Failure ........RAP 14 Voice Message Test Failure ........RAP 15 No Acoustic Line Monitor ........RAP 16 Document Does Not Feed ........RAP 17 Multiple Document Feeds ........RAP 18 Document Skews ........RAP 19 Document Jams ........RAP 20 Problems Shown On LCD Display ............RAP 20A Cover Open ............RAP 20B Printer Alarm 1 ............RAP 20C Printer Alarm 2 ............RAP 20D Printer Alarm 3 ............RAP 20E Printer Alarm 4 ............RAP 20F Paper Jam ............RAP 20G No Paper Cassette ............ Action Items For LCD Display Problems ........RAP 21 Image Problems ............RAP 21A Poor Print Quality (Images Light Or Blurred As A Whole)
Page 37 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 ............RAP 21B Dark Background Density ............RAP 21C Printed Output Is Blank ............RAP 21D Vertical Black Stripes On Printed Output ............RAP 21E Repetitive Spaced Marks On Printed Output ............RAP 21F Vertical White Streaks On Printed Output ............RAP 21G Areas Missing From Printed Output ............RAP 21H Poor Fusing 2.6 Tests ....2.6.01 Self-Diagnosis ....2.6.02 Sensor Calibration / Scanning Check ....2.6.03 LED Test ....2.6.04 Tone Test ....2.6.05 High-Speed Modem Transmit Test ....2.6.06 High-Speed Modem Receive Test ....2.6.07 Multi-Frequency Send Test ....2.6.08 Print Test ....2.6.09 Voice Message Test 2.7 Reports - General Information ....2.7.02 Service Codes List (Activity Report) ....2.7.03 Protocol Dump ........Facsimile Control Field Conversion Table 2.8 Resets ....2.8.01 General Information ....2.8.02 Toner Counter Reset ....2.8.03 Drum Counter Reset ....2.8.04 Fuser Counter Reset ....2.8.05 System Reset 2.9 Technical Function Settings ....List Of Technical Functions - Okifax 2200 ....List Of Technical Functions - Okifax 2400/2600 ....2.9.02 Service Bit / Service Parameter ........Bit Assignments Table 2.10 Tel / Fax Automatic Switching 2.11 Touch Tone Mode 2.12 Dialing Parameters 2.13 User Functions ....2.13.02 Dual Access Combination Table - Okifax 2400/2600 2.14 General Operation Diagrams 3 Disassembly & Maintenance Disassembly & Maintenance - General Information 3.2 Disassembly/Assembly Procedures ....3.2.01 Preliminary Items ....3.2.02 Doc. Stay Guide Assembly; Rear And Terminal Cap Covers
Page 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120
Table of Contents ....3.2.03 Right Side Cover And Speaker ....3.2.04 Network Control Unit ....3.2.05 Left Side Cover Assembly ....3.2.06 Cradle Assembly ....3.2.07 Hook Switch Board ....3.2.08 Memory Board ....3.2.09 Control Panel Assembly And Paper Guide (U) ....3.2.10 Feed, Pinch Roller; Tension Arm; Adf Spring, B-Up Plate ....3.2.11 Separation Rubber ....3.2.12 Cover (U) ....3.2.13 ADF, SUB, And Sensor Rollers; Paper Guide & Releases ....3.2.14 Verification Stamp, Paper Guide (E), And Feed Roller(2) ....3.2.15 Contact Image Sensor Assembly ....3.2.16 Gear Frame Assembly And Scan Motor ....3.2.17 PC-1, PC-2, And Pinch Roller ....3.2.18 Release Guide Assembly And Sub-Cover (Right) ....3.2.19 Main Control Board, Second Tray Interface Board ....3.2.20 Lower Base Assembly ....3.2.21 Stacker Cover And Led Head ....3.2.22 Feed Guide, Eject Roller, And Fusing Unit Assemblies ....3.2.23 Motor Assembly, Resist Motor, And Main Motor ....3.2.24 Pressure & Transfer Rollers, Idle Gears, Cover Open Arm, Reset Levers ....3.2.25 Registration Roller, Sensor Plates, Damper Cover Arm, Gear ....3.2.26 Line Board And Network Control Board ....3.2.27 Printer Control Board And Fan ....3.2.28 PS Board, Cassette Tray Assm., & Cassette Sensor Plate 3.3 Adjustments And Service Settings 3.4 Cleaning 3.5 Lubrication A Board Diagrams Board Diagrams A.2 Index To Charts ....A.2.01 Main Control Board (MCNT-250) Okifax 2200 ....A.2.02 Main Control Board (DFCU) Okifax 2400/2600 ....A.2.03 Printer Control Board (PCNT-250) Okifax 2200 ....A.2.04 Printer Control Board (DFPU) Okifax 2400/2600 ....A.2.05 Network Control Unit (NCU)
Page 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 ....A.2.06 Power Supply Board (PWU) ....A.2.07 Memory Board (MT-25) Okifax 2200 ....A.2.08 Memory Board (DFME) Okifax 2400/2600 ....A.2.09 Line Interface Board (LINE) ....A.2.10 Connector Board (CB-250) ....A.2.11 Interconnect Diagrams (2200) ........Okifax 2200 - 2 Of 5 ........Okifax 2200 - 3 Of 5 ........Okifax 2200 - 4 Of 5 ........Okifax 2200 - 5 Of 5 ....A.2.12 Interconnect Diagrams (2400/2600) - 1 Of 6 ........Okifax 2400/2600 - 2 Of 6 ........Okifax 2400/2600 - 3 Of 6 ........Okifax 2400/2600 - 4 Of 6 ........Okifax 2400/2600 - 5 Of 6 ........Okifax 2400/2600 - 6 Of 6 B Illustrated Parts B.1 Illustrated Parts Listing - General Information ....B.1.02 Definitions Of Terms ....B.1.03 Parts Ordering Information B.2 Charts ....B.2.01 Cabinet Assembly (1 Of 2) ....B.2.02 Cabinet Assembly (2 Of 2) ....B.2.03 Control Panel Assembly (Okifax 2200) ....B.2.04 Control Panel Assembly (Okifax 2400/2600) ....B.2.05 Printer Assembly (1 Of 3) ....B.2.06 Printer Assembly (2 Of 3) ....B.2.07 Printer Assembly (3 Of 3) ....B.2.08 Base Assembly (1 Of 2) ....B.2.09 Base Assembly (2 Of 2) ....B.2.10 Scan Assembly (1 Of 2) ....B.2.11 Scan Assembly (2 Of 2) ....B.2.12 Scan Unit (1 Of 3) ....B.2.13 Scan Unit (2 Of 3) ....B.2.14 Scan Unit (3 Of 3) ....B.2.15 Upper Paper Guide Assembly (1 Of 2) ....B.2.16 Upper Paper Guide Assembly (2 Of 2) ....B.2.17 Cables ....B.2.18 Options ....B.2.19 Packaging ....B.2.20 Consumables ....B.2.21 Documentation B.2.3 UST-500 Illustrated Parts List ....B.2.31 Assembly View
Page 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
Table of Contents ....B.2.32 Section 1: Cabinet Assembly ....B.2.33 Section 2: Mechanical Unit ....B.2.34 Section 3: Cassette Assembly C Installation of Options C.1 Overview C.2 Option Installation ....C.2.02 UST-500 (Second Paper Cassette Unit) ........UST-500 Testing Procedure ....C.2.03 SIO-45 Board (RS232-C Interface) C.3 Telephone Answering Device (TAD) Interface
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Service Guide OF2200/2400/2600
Chapter 0 About This Manual
This document may not be reproduced without the written permission of the Okidataź Sales and Product Training Group. Every effort has been made to ensure the accuracy of the information contained in this training course. Okidata is not responsible for errors beyond its control. © 1994 by Okidata All rights reserved. First Edition January, 1994 Second Edition July, 1994 Written and produced by the Okidata Sales and Product Training Please send any comments on this publication to the address listed below. Okidata Sales and Product Training 532 Fellowship Road Mount Laurel, NJ 08054-3499 Facsimile Number: (609) 235-2600, ext. 7034. Okilink Login Name: Technical Training OKI is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. OKIDATA is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. OKIFAX is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd. Touch Tone is a registered trademark of American Telephone and Telegraph
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 1 Principles of Operation
1.1 PRINCIPLES OF OPERATION This module contains three sections. · Transmitter Theory of Operation · Receiver Theory of Operation · LED Printer Theory of Operation 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 1 Principles of Operation
1.1.01 Compatibility The facsimile machine operates as a Group 3 (G3) facsimile device. 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 1 Principles of Operation
1.1.02 Communications Mode The unit operates as a half-duplex facsimile transceiver. Transmit and receive operations cannot take place at the same time. However, documents can be prepared for transmission while the machine is engaged in message reception. These documents will be automatically transmitted upon completion of the receiving operation. 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 1 Principles of Operation
1.1.03 Modem Operation The high-speed modem conforms to the following standards. · CCITT Standard V.29 for 9600/7200 bps (bits per second) operation · CCITT Standard V.27 ter. for 4800/2400 bps operation · CCITT Standard for V.17 14400/12000 bps (Okifax 2400, 2600 only) · CCITT Standard for V.33 14400/12000 bps (Okifax 2400, 2600 only) The low-speed (300 bps) modem, which is used for handshaking, conforms to CCITT standard V.21 Channel 2 or equivalent. 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 1 Principles of Operation
1.1.04 Automatic Fall-back Mode The unit will change the message transmitting speed according to the following fall-back plan. The first page of the message is transmitted at 14.4 kbps (Okifax 2200 communicates at 9600 bps maximum). The receiving station will continuously monitor the received data. If the receiving station detects six or more consecutive error lines during reception of a single page, or if the total number of errors detected during the reception of a single page exceeds 10% of the data on the transmitted page, it will return a Retrain Negative (RTN) signal to the transmitting station upon termination of the page reception. With an RTN signal received, the transmitting station will downgrade its speed by one level (to 12 kbps in this case) and continue transmission of the next page. Similarly, should the transmitting station again receive an RTN signal from the receiving station, it will downgrade the speed another level. 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 1 Principles of Operation
1.1.05 Telephone Line Connection The facsimile machine is connected to the telephone line via the line interface board. Two RJ-11 connectors are provided. One connects to the telephone line. The other connects to an external telephone. A separate modular jack is provided for connection of the handset. The unit will control the switching between the handset (or the external telephone) and the telephone line to permit use of the handset or telephone for voice communication. 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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1.1.06 Error Correction Mode (ECM) Error Correction Mode (ECM) provides error-free transmission when communicating with a remote unit that also has ECM. Here is an explanation of the ECM process. · The transmit machine groups image data into blocks and transmits one block of data at a time to the receive machine. At the end of each block, a Partial Page Signal (PPS) is transmitted. · The receive machine stores the data block in memory and checks each frame within that block for errors. Modified Huffman assigns a binary code to consecutive recurring bits of white or black. The codes must add up to a total of 1728 bits, which is the Main Scan Rate established by CCITT. Modified Read uses a comparison technique. The line being coded is compared to the previous line and differences are noted. Codes are then assigned to reflect the differences between the two lines. · If no errors are detected, the receiver sends Message Confirmation (MCF). MCF requests the transmit machine to transmit the next data block. · If an error is detected by the receive machine, the receive machine will transmit the frame number of the defective frame back to the transmit machine in a signal called Partial Page Request (PPR). · The transmit machine will then re-transmit the frame to the receive machine as a Partial Page. · The receive machine rechecks the Partial Page, and (if all frames are correct) the receive machine transmits MCF. · The next data block is transmitted. 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 1 Principles of Operation
1.1.07 Quick Scan Mode Both the Okifax 2400 and Okifax 2600 have quick scan capability. With MEM Transmission enabled, the units will scan documents placed on the ADF tray into memory. During a quick scan operation, each letter size page is scanned in approximately three seconds. Once the documents are stored in memory, the transmission is initiated, without requiring additional user action. · Okifax 2200 Quick Scan = 7.6 seconds per page (@ Standard Resolution) · Okifax 2400 Quick Scan = 6.0 seconds per page (@ Standard Resolution) · Okifax 2600 Quick Scan = 3.0 seconds per page (@ Standard Resolution) 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 1 Principles of Operation
1.1.08 Major Assemblies (Mechanical) The following major mechanical assemblies make up the facsimile machine. · Automatic Document Feeder (ADF) Unit / Scan Unit · Printer Unit
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 1 Principles of Operation
1.1.09 Major Assemblies (Electrical) The following major electrical assemblies make up the facsimile machine. · Main Control Board (DFCU / MCNT) · Printer Control Board (DFPU / PCNT) · Network Control Board (NCU) · Operator Panel Assembly Not Shown · Power Supply Unit Not Shown · Memory Board Not Shown · Line Interface Board Not Shown · Hook Switch Board Not Shown · Connecting Board · Second Paper Tray Mechanism Board
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 1 Principles of Operation
Okifax 2200 - Copy Function Block Diagram
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 1 Principles of Operation
Okifax 2400/2600 - Copy Function Block Diagram
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 1 Principles of Operation
Okifax 2200 - Report Print Function Block Diagram
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 1 Principles of Operation
Okifax 2400/2600 - Report Print Function Block Diagram
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 1 Principles of Operation
1.2 TRANSMITTER THEORY OF OPERATION 1.2.01 Typical Transmission When a telephone number is dialed through the machine (either manually or through auto-dial), a connection will be established with the receiving station through the Public Switched Telephone Network (PSTN). When the call is answered, the operator will hear the Called Equipment Device (CED) tone from the receiving station. With CED received, the transmit machine acknowledges that the connection is established and proceeds to the CCITT T.30 300 bps handshake procedure. NOTE: Refer to the Receive and Transmit Handshake Procedure Block Diagrams for functional overviews of 300 bps handshaking. Refer to the Transmit Block Diagram for an overview of G3 Transmit Operations When the Digital Identification Signal (DIS) is received, G3 mode transmission is possible and the document is scanned, page by page. The image data is temporarily stored in First In First Out (FIFO) memory until it becomes valid for transmission. In approximately three seconds, the machine will receive Called Subscriber Identification (CSI) from the distant station. After reading the document pages and storing the image data in memory, the machine begins the handshake with the distant station. If the 14.4/9.6 kbps training is successfully completed, the machine will start transmitting the image data in digital, coded form. Training is a high speed data pattern transmitted to the receive modem. This training data pattern causes the receive modem to synchronize with the transmit modem. If the training fails due to bad phone line conditions, an automatic fallback to a lower rate will occur. The result will be indicated on the LCD display. As the machine transmits each page of image data, the page count on the LCD display will increment. Training performs the functions listed below. · Training tests the line condition for valid transmissions at a particular data rate. The TCF consists of 100 binary zeroes transmitted in a burst. At least 98% accuracy must be achieved before transmission can take place at that data rate. · The receiving station uses training to set the preliminary equalization for the current line conditions.
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 1 Principles of Operation
Okifax 2200 - 300 bps Transmit Handshake Operation Diagram
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 OF2200/2400/2600
Chapter 1 Principles of Operation
Okifax 2400/2600 - 300 bps Transmit Handshake Operation Diagram
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 OF2200/2400/2600
Chapter 1 Principles of Operation
Okifax 2200 - 300 bps Receive Handshake Operation Diagram
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 1 Principles of Operation
Okifax 2400/2600 - 300 bps Receive Handshake Operation Diagram
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 1 Principles of Operation
Okifax 2200 - G3 Transmit Functional Block Diagram
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 1 Principles of Operation
Okifax 2400/2600 - G3 Transmit Functional Block Diagram
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 1 Principles of Operation
1.2.02 Operator Panel Assembly (OPE) Through the operator panel assembly, the end user initiates transmit and receive operations, sets desired options, programs telephone numbers and other data, and interfaces in all areas of the operation of the machine. The panel consists of an LCD display (two rows of 20 characters), a numeric key pad, nine LED indicators, and function keys. The functions of the keys and indicators are described in the Users Documentation. 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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1.2.03 Automatic Document Feeder (ADF) The automatic document feeder transfers document sheets to the scan unit automatically, one at a time. The following diagram shows the mechanism used for detecting the leading and trailing edges of a document. When a document is placed on the feeder, it is sensed by the document detect sensor (PC1). This causes the feed rollers to activate, feeding the document. The document is fed to the PC2 lever, where the leading edge of the document is detected. When transmit (or copy) begins, the document is fed by the transmit stepper motor to the start scan position. The documents trailing edge is detected when the PC2 lever is released. If another document is on the feeder, the process is repeated. The Okifax 2200/2400/2600 also contain a B4 paper width sensor (PC1). The Okifax 2600 has an additional photosensor (PC1) to detect A3 paper width. The separation rubber holds back the top originals and allows only one document to be fed into the scanner area. The separation rubber and automatic document feed rollers should be cleaned or replaced according to the cleaning schedule (in Module 3 of this manual) to assure proper operation. The automatic document feed capacity is 50 pages of 20 pound paper. Place documents (on the feeder) image side DOWN. When feeding multiple pages, the bottom page is fed first, working toward the top.
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 1 Principles of Operation
1.2.04 Scanner Assembly The Okifax 2200 and 2400 use a 2048-bit element direct contact type image scanning sensor. The Okifax 2600 uses a 2432-bit element direct contact image scanning sensor. LEDs are located at the bottom of the scan glass and image sensors are located at the top of the glass. When the document reaches the scanning unit, it passes directly in front of the image sensor. The LEDs illuminate the document and the light reflects back to the image sensors. This image data is sent to the printer control board via the main control board. The transmitted document length is limited to 14 inches; however, the machine can be modified for longer transmissions. (See Transmitting Long Documents in the Users Documentation). Transmission will stop and a line disconnect will occur if the end of the document is not detected within 14 inches after scanning begins (unless the unit is set for unlimited transmission.) This message will be displayed if the document does not reach the scanning position within five seconds after the start of a document feed.
Okifax 2200 RELOAD DOCUMENT CONFIRM AND "STOP" Okifax 2400/2600 (DATE/TIME, RX MODE) REMOVE DOCUMENT AND "STOP" NOTE: When a jam condition is displayed on the operator panel during message transmission, the machine will stop, but its receiving capability will remain active. 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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1.2.05 Encoder Scanned image data received by the board is sent to the encoder/decoder (ENC/DEC) integrated chip of the main control board. The image data is compressed by the ENC/DEC according to the Modified Huffman (MH) and Modified Read (MR) encoding scheme, or MH only. The use of MH only or both MH and MR is determined by a function setting. Data is then stored in the FIFO area in one byte units. Fill bits are inserted if the length of one encoded line is less than the minimum scan time of the remote unit. Data is transferred to the network control unit, then sent to the line interface board for transmission over the phone line. 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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1.2.06 Modem The modem, located on the main control board, modulates the data in the correct G3 (14.4, 12, 9.6, 7.2, 4.8, or 2.4K bps) data rate that was determined during handshaking between the local machine and the remote receiver. Modulation is the process of converting the digital output of the scanner into an analog signal that can be transmitted over the telephone system. 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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1.2.07 Network Control Unit (NCU) The network control unit receives the modulated data from the main control board and transfers the data to the line interface board. The network control unit performs the following functions during the transmit operation. · Unit connection / disconnection to the telephone line via the CML Relay · Dial pulse generation · PIS tone detection · OFF-HOOK detection (Line Current Detector) · TX output signal attenuation (normally 9 decibel output) · Separation of the TX and RX signals (performed by the Hybrid Transformer) · Impedance matching (the 600 ohm impedance of the telephone line) 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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1.2.08 Line Interface Board The line interface board provides the RJ-11 connection used to transmit data to the PSTN, PBX, or Leased Line. 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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1.3 RECEIVER THEORY OF OPERATION 1.3.01 Operator Panel Through the operator panel, the user initiates manual receive operations and sets auto-answer options. 1.3.02 Line Interface Board The line interface board provides the RJ-11 connection used to receive data from the PSTN, PBX, or Leased Line. 1.3.03 Network Control Board (NCU) The network control unit receives the modulated data from the line interface board and sends it to the modem (located on the main control board). The operation of the network control unit in the receive mode is very similar to the transmit mode. However, during receive operations, the network control unit also functions as an amplifier for the received signal. 1.3.04 Modem The modem demodulates the data from the G3 (14.4, 12, 9.6, 7.2, 4.8, or 2.4K bps) scheme that was determined during handshaking. The data is then sent to the RAM memory for temporary storage. The storage time is dependent on whether the machine is printing real-time or from memory. 1.3.05 Decoder The decoder decodes the MH, MR, or MMR data from the RAM into lines of picture data that are 1,728 bits in length. After the data has been received, demodulated, and decoded, it is transferred to the printer control board. 1.3.06 Document Size Since the available printing area of the printer is smaller than the paper size, document contents may be missed on both sides of the paper, or a document image having the same length as the printing paper may be split into separate pages during printing. To prevent this, the unit automatically sets the proper reduction ratio within the range of 76 to 100% if the RX REDUCTION function has been set ON. If a received document image is longer than the available printing length, the excess part of the image is eliminated. If the SPLIT PRINT function has been set ON, the excess image will be printed on the next page. 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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Okifax 2200 - G3 Receive Operation Block Diagram
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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Okifax 2400/2600 - G3 Receive Operation Block Diagram
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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1.4 LED PRINTER 1.4.01 Principal Components The principal hardware components of the printer unit are listed below. · Printer Control Board · Power Supply Unit · Fuser Unit · Main Motor · LED Head · Registration Motor · DC Fan · Second Paper Tray Mechanism (option) 1.4.02 Printer Control Board The printer control board contains a printer unit gate array, 7.5 megahertz microprocessor, send motor driver (transistor array), registration motor driver integrated circuit, drum motor driver integrated circuit, and fan motor driver transistors. This board controls the paper feed and paper transport functions. It also activates the LED array diodes, which leave a latent electrostatic image on the photosensitive drum. This latent image is printed by fusing toner to the paper. 1.4.03 Power Supply Unit The power supply is a switching-type unit, which generates the following voltages from the AC input voltage. · + 5 vdc : Printer Logic · + / - 12 vdc: Interface Signal Levels · + 38 vdc: Transmit Stepper Motor, Registration / Drum Motor Drive, Fan Drive, High-Voltage Source. When the board enables the HEATON signal, the power supply provides the AC voltage to the fuser lamp. 1.4.04 Power Supply Board Components and Functions The power supply consists of integrated circuit 1 (a one-chip CPU), a cover-open switch, the high, medium, and low voltage generation circuits and photosensors.
Photosensors · Outlet Sensor (PS1) ON: Paper is present Detects paper jams at the paper exit path. · Paper Sensor (PS2) ON: Paper is present Along with the outlet sensor, is used to monitor paper feed and paper length. · Inlet Sensor 1 (PS3) ON: Paper is present Detects the leading edge of the paper. Used to determine when to switch from the hopping to the feeding operation. · Paper End Sensor (PS4) ON: Paper is present Detects the presence of paper in the cassette. · Inlet Sensor 2 (PS5) ON: A4 or larger Detects the width of the receive paper. · Toner Low Sensor (PS6) Detects a low toner condition Cover Open Switch Whenever the stacker cover is opened, the cover open switch is turned OFF. This removes the + 38 vdc source voltage from the high-voltage generation circuit. As a result, all high-voltage outputs are disabled. The CVOPN signal is sent to the main control board and the cover open routine is performed. The message COVER OPEN will be displayed on the operator panel. High-Voltage Circuits The following voltages are generated for use in the electrostatic printing process. OUTPUT SB1/SB2 DB1/DB2 TR1/TR2 CH CB VOLTAGE - 450 vdc +/- 300 vdc + 1 Kvdc/-750 vdc - 1.3 Kvdc + 400 vdc USE Toner Supply Roller Toner Development Roller Transfer Roller Charging Roller Toner Cleaning Roller
1.4.05 Fuser Unit The fuser unit is controlled by a thermistor, the printer interface gate array (PIGA), an LSI, and the CPU to keep the heat roller surface temperature within a predetermined range (about 150 degrees Celsius). A thermal fuse within the fuser unit prevents abnormal temperature rises in case the thermistor fails. NOTE: The CPU checks for an open circuit in the thermistor at power-on. A fuser alarm is set if this error is detected. The CPU also sets a fuser alarm if the proper temperature is not attained within a specified period of time after power-on.
Upon detecting a fuser alarm, the CPU will stop printing (after printing the current page). 1.4.06 Main Motor (Drum Motor) The main motor is controlled by the motor control LSI, on the main control board via the printer control board. The motor used is a four-phase motor, driven by the motor driver integrated circuit located on the printer control board. 1.4.07 LED Array The printer control board provides serial transfer of print data (HDDT0) to the LED array. The signal HDCLK provides data transfer timing. 1728 bits of data are shifted into the LED array registers. Then, the signal HDLD loads this data into the latch circuits. This enables the individual LEDs. 1.4.08 DC Fan The fan is controlled by the FAN ON-P signal from the main control board via the printer control board. In order for the facsimiles printer to operate, the signal FAN SENSE-N must be active. NOTE: The fuser and the fan are not enabled when the cover is open. If the fan fails to run, the fuser will turn off and the message PRINTER ALARM 3 will be displayed. Printing is disabled. 1.4.09 Registration Motor The registration motor is driven clockwise for initial receive paper loading. It is driven counter-clockwise for paper feeding. The motor is controlled by the motor control LSI on the main control board and is driven by the motor driver integrated circuit on the printer control board. 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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1.5 PRINTING PROCESS - General Information 1.5.01 General Information Hopping and feeding are controlled by a single registration motor. Turning the registration motor in the "A" direction drives the hopping roller. Turning the registration motor in the "B" direction drives the registration roller. The registration gear and hopping gear contain one-way bearings. Turning each of these gears in the reverse direction will NOT turn the corresponding roller.
Printing Process Diagram
### Printing Process Overview #### 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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1.5.02 Hopping Hopping loads paper from the paper cassette. During the hopping operation, the registration motor turns in a clockwise direction. This motor drives the hopping roller, which in turn advances the paper until the inlet sensor 1 switches ON. The registration gear turns, but the one-way bearing does not allow the registration roller to turn. After inlet sensor 1 switches ON, the paper is advanced a predetermined length (until the paper reaches the registration roller).
1.5.03 Feeding Feeding transports paper through the printer. After the completion of hopping, the registration motor turns in a counter-clockwise direction. This counter-clockwise motion drives the registration roller and advances the paper. The hopping gear turns, but the one-way bearing does not allow the hopping roller to turn.
1.5.04 Charging Charging applies -1.3 Kvdc to the charge roller. The charge roller contacts the image drum surface. The charge roller has two layers: a conductive layer and a surface protective layer. The surface layer is flexible, which assures proper contact with the photosensitive drum.
1.5.05 Exposing The image drum has four layers. · Carrier Transfer Layer (CTL) · Carrier Generation Layer (CGL) · Underlayer (UL) · Aluminum Base
The CTL and CGL make up the organic photo conductor layer (OPC), which is about 20 micrometers (m m) thick. When light from the LED head irradiates the image drum surface, the light energy generates positive and negative carriers in the CGL. The positive carriers are moved to the CTL by an electrical field acting on the image drum. The negative carriers flow into the aluminum layer (ground).
The positive carriers moved to the CTL combine with the negative charges on the image surface (accumulated by the contact charge of the charge roller), lowering the potential on the image drum surface. The resultant drop in the potential of the irradiated part of the image drum surface forms an electrostatic latent image on it. The surface potential on this irradiated part of the image drum is approximately -100 vdc.
1.5.06 Developing The electrostatic latent image formed on the image drum surface is developed into a visible image. Developing takes place when contact is made between the image drum and the developing roller. As the toner supply roller rotates, toner is absorbed into the sponge type roller material. A charged particle will be attracted to a particle having a MORE POSITIVE charge than its own. The developing roller surface is charged to -300 vdc and the toner supply roller is charged to -450 vdc. Since the development roller is charged more positive than the toner supply roller, the toner on the toner supply roller is attracted to the developing roller. The toner on the developing roller contacts the doctor blade, forming a thin coat of toner on the developing roller surface.
1.5.07 Transfer The transfer roller is made of a conductive sponge material. The roller keeps the paper in constant contact with the image drum. Paper is placed over the image drum surface. A positive charge (opposite in polarity to the toner) is applied to the paper from the reverse side. A charged particle will be attracted to a particle having a MORE POSITIVE charge than its own. A high positive charge is applied to the transfer roller by the power supply board. This induced charge (on the surface of the transfer roller) is transferred to the paper when contact is made between the transfer roller and the paper. The lower side of the paper is positively charged. The negatively charged toner (on the photosensitive drum) is transferred to the upper side of the paper because of the positive charge on the lower side of the paper.
The exposed portion of the image drum contains a more positive charge than the development roller (-100 vdc vs -300 vdc). Therefore, toner is attracted to the exposed areas of the image drum, making the electrostatic latent image visible.
NOTE: The toner supply roller and the developing roller are supplied with the bias voltages required during the developing process. The toner supply roller is charged to -450 vdc. The developing roller is charged to -300 vdc.
1.5.10 Printing Refer to the Printing Process Diagram. Printing is accomplished as follows. · Approximately - 1.3 Kvdc is supplied to the charge roller. This causes the drum to charge to approximately - 750 vdc. · The LED head is turned ON by the printer control board in accordance with signals from the main control board. This causes a latent electrostatic image to be formed on the surface of the drum. · Through the development process, a toner image replaces the electrostatic image.
· A + 1 Kvdc charge is applied to the transfer roller. This causes the toner image to be transferred to the receive paper. · Heat and pressure cause the toner image to become fused to the receive paper. The 150 degree Centigrade fusing temperature is attained by turning a 400 watt halogen lamp ON. The fusing temperature is controlled by a thermistor. In the event of a thermistor failure, a temperature fuse will OPEN, turning off the quartz lamp, and preventing equipment damage. · The residual toner is removed from the drum. Printing Process Diagram
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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1.6 SENSORS AND SWITCHES 1.6.01 Paper Jam Detection Paper jam detection monitors the location of paper when the printer is powered ON and during printing. If any of the following jams are present, the printing process is interrupted and the message PAPER JAM will be displayed on the LCD. To return to the printing process, the paper jam condition MUST be cleared. This is accomplished by opening the upper cover, clearing the jam, and closing the cover. Paper Outlet Jam This jam occurs if the paper does NOT pass over the outlet sensor within a pre-determined period of time. However, the paper has already passed over the paper sensor. Paper Size Error The time interval between when the paper contacts the paper sensor and the outlet sensor determines which size (length) paper is being used. This error occurs if the paper size of the loaded paper differs by + 45 mm or more from the paper size set by the menu. Cover Open Switch When the stacker cover is opened, the cover open microswitch on the power supply unit is deactivated. This disables the + 38 vdc and 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 main control board main control board to notify it of the OFF state of the microswitch. The main control board executes the cover open routine. The operation panel displays the message COVER OPEN.
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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Paper Inlet Jam This jam occurs when either of the following situations occur. · When the printer is powered ON, paper is at inlet sensor 1. · After the hopping operation is attempted three times, the leading edge of the paper does NOT reach inlet sensor 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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Paper Feed Jam This jam occurs when either of the following conditions occur. · The paper does not pass over the paper sensor within a pre-determined period of time. · The leading part of the paper does not reach the outlet sensor within a pre-determined period of time after the paper has passed over the paper sensor. Paper Feed Jam Timing Diagram
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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1.6.02 Toner Low Sensor The toner well of the image drum cartridge contains a toner agitator. Whenever the image drum rotates, the toner agitator attempts to turn. A spring clip in the bottom of the toner well (along with the proper amount of toner) holds the agitator at the bottom of the well. However, when toner is distributed unevenly or an insufficient amount of toner is in the well, the toner agitator will rotate. Therefore, as long as the toner well contains an adequate supply of evenly distributed toner, the toner agitator will not rotate. The toner sensor lever has a magnet embedded in it. Whenever the toner agitator is positioned at the bottom of the toner well, the toner sensor lever is magnetically attracted to the toner agitator. This causes the toner sensor lever to be lifted from the path of the toner sensor. During a low toner condition (less than 20 grams of toner remaining), the toner agitator will rotate continuously. This causes the toner sensor to turn ON / OFF as the image drum rotates. The operator panel will then display the TONER LOW message. During an unevenly distributed toner condition, the toner agitator will rotate until the toner is distributed sufficiently. This causes the toner sensor to turn ON / OFF for only a few image drum rotations. The operator panel will not display an error message since this is normal printer operation.
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 Failure Analysis
2.1 OVERVIEW 2.1.01 Introduction This section is used to isolate problems to the assembly level. Application problems and detection of faulty components on the printed circuit boards are not addressed. When troubleshooting a defective unit, refer first to Module 2.4 of this Service Handbook section contains tips on preventing problems as well as a list of common problems. . This
Next, refer to Module 2.5. Repair Analysis Procedures - RAPs ) will ask you questions or require you to make observations. The answers to these questions and the results of your observations determine your next course of action. Use the RAP Index to identify which RAP should be used to resolve the problem with the machine. If you encounter a situation that is not addressed by the documentation in this kit, please report the problem to Okidata. Send your report to the Okidata Technical Training Group. Refer to the Service Center Reference Guide for information on contacting Okidata. The following information is provided to detect and analyze failures. 1. Okilink II, Faxable Facts, Technical Service Bulletins 2. Troubleshooting Tips / Common Problems 3. Repair Analysis Procedures 4. Tests 5. Reports 6. Resets 7. Technical Functions 8. TEL / FAX Automatic Switching 9. Touch Tone Mode 10. User Functions 11. Dialing Parameters 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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2.2 TROUBLESHOOTING UPDATES 2.2.01 General Information Okidata distributes updated troubleshooting information in three ways. 1. Okilink II 2. Faxable Facts 3. Technical Service Bulletins 2.2.02 Okilink II Okilink II is Okidata's Bulletin Board Service. This service is available to all Okidata Certified Service Technicians. Okilink II provides additional troubleshooting and service information. Technicians can download files, ask questions of Okidata's technical support personnel, and participate in round table discussions about Okidata products and services. Technical Service Bulletins, Recommended Spare Parts Lists, Printer Drivers, Product Specifications, and Service Training Information are also available. Refer to the Service Center Reference Guide for information on accessing Okilink II. 2.2.03 Faxable Facts Okidata's Faxable Facts is an automated fax document retrieval system. It is maintained by Okidata's Customer Information Center. Answers to common questions about Okidata products are available through faxable facts. Refer to the Service Center Reference Guide for information on accessing Faxable Facts. 2.2.04 Technical Service Bulletins Okidata's Technical Service Bulletins (TSBs) contain technical information obtained after product release. Firmware updates, part number changes, and procedural changes are some of the subjects covered by these bulletins. The TSBs are distributed through Okilink II. Refer to the Service Center Reference Guide for information on accessing Okilink II.
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2.3 REPORTING PROBLEMS 2.3.01 General Information Okidata strives to provide accurate and detailed service information through its training materials. The Technical Training Group realizes that service technicians have valuable experience, knowledge, and opinions. Okidata strongly encourages you to report any problems you may encounter when using the materials of this training kit. Please be as specific and detailed as possible. Your comments, suggestions, and criticisms are used to update and revise training kits. You should reference the training materials when servicing Okidata products. Most problems can be solved by using the information provided in the training materials. If you encounter a situation that cannot be solved, please let Okidata know. Refer to the Service Center Reference Guide for information on contacting Okidata. 2.3.02 Problem Lists Technicians frequently request a list of common problems specific to a product. Technical Training Kits are written before a product is shipped to customers. Therefore, such information is not available when a product is first released. However, Okidata wants to respond to these requests. Okilink II provides round-table discussions on technical problems. Errors and corrections in the training materials are listed in the Training Section of Okilink II. The Technical Service Bulletins (also known as Okidata's Monthly Mail) are available via Okilink II. Situations that are not addressed in the reference documentation, Technical Service Bulletins, or round tables may be reported to the Dealer Service and Support Engineers (DSSEs) or the Technical Training Group. You will receive a response to your message within one business day. The information on Okilink II is the most accurate and up-to-date technical information available from Okidata. This is only possible with your assistance. By reporting your suggestions, concerns, and problems, Okidata can provide the best possible information. Your cooperation is greatly appreciated. Thank you for your help! 2.3.03 Reporting Methods Okilink II You may use Okilink II to report your findings. Refer to the Service Center Reference Guide for information on using Okilink II. Course Critique Use the Course Critique to report any problems you find as you are completing the self-paced training. Fax Number If you wish to fax your response, please use the numbers listed in the Service Center Reference Guide. Mailing Address If you respond by mail, please use the appropriate address listed in the Service Center Reference Guide.
Information Provided Please provide the following information when reporting problems. 1. Okidata Dealer Number 2. Technicians Name 3. Company Name 4. Company's Address (Street, City, State/Province, ZIP / Postal Code, Country) 5. Telephone and Fax Numbers (with area / country access codes) 6. Product Name 7. Units Serial Number 8. Description of Problem 9. Document Name (with page number or procedure) with error or problem. 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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2.4 TROUBLESHOOTING TIPS 2.4.01 Preliminary Checks 1. Is the unit operated under the proper ambient conditions? 2. Is the paper being used made specifically for xerographic printing? 3. Have the toner cartridge and image drum been replaced as recommended? 4. Has the image drum cartridge been installed properly? 5. Is Okidata toner being used? 2.4.02 Tips for Preventing Image Problems 1. Do not let anything touch the surface of the image drum. 2. NEVER expose the image drum to direct sunlight. 3. Do not touch the fusing unit. Oil from your skin can cause fusing temperature variation. 4. Do not expose the image drum to light for more than five minutes. 5. Do not touch the transfer roller. Touching the transfer roller may cause incomplete toner transfer, resulting in faded output. 2.4.03 Common Problems 1. The display is blank. - Check that the power switch is ON. - Check that the power cord is firmly plugged into the unit and the wall outlet, and make sure that power is supplied to the wall outlet. - Make sure the memory board is properly connected. 2. Nothing happens when you press the operator panel keys. - Power OFF the unit, wait 10 seconds, then power ON the unit. - Check that the power cord is firmly plugged into the unit and the wall outlet. - Verify that the ROMs on the memory board are installed properly.
3. The display tells you to replace paper even though there is paper in the cassette. - Remove the paper cassette and make sure that the paper is firmly stacked in the cassette. Push the paper under the tabs on the sides of the paper cassette. 4. Your original document jams. - Make sure the document is not wider than the width of the document feeder. - Check the document for wrinkles, tears, or other damage. - Make sure there are no staples or paper clips attached to the paper, and that the paper is clean and dry. - Check for contaminants on the contact image sensor. - Make sure the feed rollers and separator pad are clean and free of contaminants. - If the problem persists, copy the document on a photocopier and fax the copy. 5. Your unit will not dial. - Make sure the telephone line is connected to the line jack at the rear of the unit. - Lift the handset and check for a dial tone. If you do not hear one, there may be a problem with your telephone line. - If you hear a dial tone, you may be using the wrong dial method (pulse or tone) for your area. - Make sure the telephone jack is an RJ-11C. 6. The display shows a communication error. - You may be trying to communicate with a non-group 3 facsimile machine. - The remote machine may not be able to perform the function that you want (such as polling or confidential reception). - The remote machine may be out of paper or experiencing a paper jam. - Bad telephone lines can cause communication errors. Try sending the fax again. - The receiving facsimile machine may have a service problem. Send a fax to a different location to test your unit. 7. You sent a fax, but it was received completely blank. - Make sure that you have loaded your document face-down. 8. You keep getting reports that you do not want. - Check the User Function settings and disable all unwanted reports.
9. When you receive long faxes or make copies of long documents, the bottom is always cut off. - Try enabling the RX SPLIT PRINT or COPY SPLIT PRINT User Functions. These functions will split long documents across two pages. 10. You sent a fax, but the image the remote fax received was very poor quality. - If your document has small type, complex illustrations, photographs or was extremely light or dark, try changing the TRANSMIT RESOLUTION and TYPE OF ORIGINAL settings. - Copy the document on the unit to see how well it copies. If the copy looks good, the problem may be telephone line interference or a defective facsimile machine at the receiving side. 11. Your unit does not receive faxes. - Check which reception mode is set on your unit. The mode will be displayed in the upper right-hand corner of the LCD when the unit is in idle mode. 12. The image received on your unit is very poor. - If your document has small type, complex illustrations, photographs or was extremely light or dark, ask the person sending the fax to change the TRANSMIT RESOLUTION and TYPE OF ORIGINAL Settings. - Copy a similar document to test your unit. If the copy looks good, the problem may be telephone line interference or a defective facsimile machine at the transmitting side. 13. You tried dialing with a one touch key or an auto dial code but nothing happened. - Check that the One Touch or Auto Dial key being used has a programmed number. - Check the telephone number to make sure it was entered correctly. - When you are dialing with an Auto Dial Code, be sure to press the Auto Dial Key before you enter the code. - If your unit has the AUTO START feature disabled, you must press START to begin dialing (refer to Dialing Parameters in the Users Documentation for AUTO START information). - Confirm that the correct dial method is set (pulse or tone). 14. You set your unit for delayed transmission but nothing happened. - Verify that the DATE and TIME are correctly set. 15. Your received documents are light or have vertical white streaks on them and you are not out of toner. - You may need to replace the image drum unit. 16. Your unit disconnected before you could answer a voice request.
- You have only 15 seconds to answer a voice request. Once you hear the warbling tone, pick up the handset, then press the VOICE REQUEST. 17. Your unit will not poll the remote fax machine. - Call the person at the remote fax machine and make sure they have loaded documents and placed their machine in the Polling Transmission Mode. - Make sure that the remote machines polling number matches the password that you entered. 18. Someone tried to send you a confidential fax but nothing happened. - You must set up a confidential mailbox and enter a 4-digit password before anyone can send you a confidential fax. - If your message is left in the unit for more than the specified amount of days, your fax machine will erase it. Okifax 2200: Ten days Okifax 2400/2600: Twenty days 19. Your received faxes sometimes look distorted. - If the received document is wider/longer than the paper loaded in the paper cassette, the unit will automatically reduce the width/length of the document to fit. - This could also be caused by communication problems. 20. Your unit is connected to a PBX and cannot dial out. - You must enter your access digit(s) before the telephone number for each number that you dial or program into your machine. - Use the "Pause" Character after the access digits. This allows time for the PBX to switch to an outside line. - You should enable the PBX Function. Okifax 2200: Dialing Parameter Settings Okifax 2400/2600: Technical Function 61. 21. You want to answer the phone but your unit always answers first. - If you are using an external telephone, change the units RING RESPONSE setting. Okifax 2200: User Function 24 Okifax 2400/2600: Technical Function 65 - If you are using the Telephone/Fax Reception Mode, and require more time
to answer the telephone before the unit switches back to fax mode, modify the TEL/FAX TIMER PRG. Okifax 2200: User Function 10 Okifax 2400/2600: Technical Function 64 22. The unit is too loud. - Adjust the Monitor Volume Okifax 2200: User Function 05 Okifax 2400/2600: Technical Function 10 - Adjust the Incoming Ring Volume. The volume switch is at the rear of the unit. - Adjust the Buzzer Volume. Okifax 2200: User Function 16 Okifax 2400/2600: Technical Function 11 - Change the Key Touch Response. Okifax 2200: User Function 16 (Buzzer Volume) Okifax 2400/2600: Technical Function 12
- Change the No Paper Call Feature. (The unit warbles when it is out of paper). Okifax 2200: User Function 11. Okifax 2400/2600: Not applicable. Saves to memory. 23. The machine wont program. (Okifax 2200) - During multiple location polling reception or multiple location memory transmission, the program menus cannot be accessed. Try again after the operation is completed. 24. Transmission of a fax has been stopped. The ALARM is on and the document cannot be removed. (Okifax 2200) - Press STOP. This deactivates the ALARM. - Press STOP. - Remove the document. 25. The fax machine will not allow user operation. (Okifax 2200) - A department id has been programmed. Enter the four digit department ID, then
proceed. - If a department ID is not in use, power OFF the unit. Wait ten seconds. Power ON the 26. The unit is connected to an answering machine and it doesnt work. - Enable the Telephone Answering Device (TAD) Mode. Okifax 2200: Technical Function 45 Okifax 2400/2600: TAD Mode is not used 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) unit.
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2.5 REPAIR ANALYSIS PROCEDURES 2.5.01 General Information When using the Repair Analysis Procedures (RAPs), follow these steps. 1. Work through the Start Here Flowchart. If the problem is not resolved, proceed to the next step. 2. Use the RAP Ind