Page: 1
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 Page
Service Guide OF2200/2400/2600
0 About This Manual |
|
Front Cover |
1 |
Copyright |
2 |
1 Principles of Operation |
|
1.1 Principles Of Operation |
3 |
....1.1.01 Compatibility |
4 |
....1.1.02 Communications Mode |
5 |
....1.1.03 Modem Operation |
6 |
....1.1.04 Automatic Fall-Back Mode |
7 |
....1.1.05 Telephone Line Connection |
8 |
....1.1.06 Error Correction Mode (ECM) |
9 |
....1.1.07 Quick Scan Mode |
10 |
....1.1.08 Major Assemblies (Mechanical) - Cross-Section |
11 |
Diagram |
|
....1.1.09 Major Assemblies (Electrical) |
12 |
........Okifax 2200 - Copy Function Block Diagram |
13 |
........Okifax 2400/2600 - Copy Function Block Diagram |
14 |
........Okifax 2200 - Report Print Function Block Diagram |
15 |
........Okifax 2400/2600 - Report Print Function Block Diagram |
16 |
1.2 Transmitter Theory Of Operation |
17 |
........Okifax 2200 - 300 Bps Transmit Handshake Operation |
18 |
Diagram |
|
........Okifax 2400/2600 - 300 Bps Transmit Handshake |
19 |
Operation Diagram |
|
........Okifax 2200 - 300 Bps Receive Handshake Operation |
20 |
Diagram |
|
........Okifax 2400/2600 - 300 Bps Receive Handshake |
21 |
Operation Diagram |
|
........Okifax 2200 - G3 Transmit Functional Block Diagram |
22 |
........Okifax 2400/2600 - G3 Transmit Functional Block Diagram |
23 |
....1.2.02 Operator Panel Assembly (OPE) |
24 |
....1.2.03 Automatic Document Feeder (ADF) |
25 |
....1.2.04 Scanner Assembly |
26 |
....1.2.05 Encoder |
27 |
....1.2.06 Modem |
28 |
....1.2.07 Network Control Unit (NCU) |
29 |
....1.2.08 Line Interface Board |
30 |
1.3 Receiver Theory Of Operation |
31 |
........Okifax 2200 - G3 Receive Operation Block Diagram |
32 |
........Okifax 2400/2600 - G3 Receive Operation Block Diagram |
33 |
1.4 Led Printer - Principal Components |
34 |
1.5 Printing Process - General Information |
35 |
....1.5.02 The Full Printing Process |
36 |
Table of Contents |
Page |
1.6 Sensors And Switches |
37 |
....Paper Inlet Jam |
38 |
....Paper Feed Jam |
39 |
....1.6.02 Toner Low Sensor |
40 |
2 Failure Analysis |
|
2.1 Overview |
41 |
2.2 Troubleshooting Updates |
42 |
2.3 Reporting Problems |
43 |
2.4 Troubleshooting Tips |
44 |
2.5 Repair Analysis Procedures |
45 |
....2.5.02 RAP Index |
46 |
....Start Here Flowchart |
47 |
........RAP 01 No LCD Display |
48 |
........RAP 02 Alarm Led Is Lit |
49 |
........RAP 03 Print Test Failure |
50 |
........RAP 04 Local Copy Problem |
51 |
............Checking PC1 And PC2 |
52 |
........RAP 05 Auto Dial Problem |
53 |
........RAP 06 Data Transmission Problem |
54 |
........RAP 07 Auto Reception Problem |
55 |
........RAP 08 Reception Problem |
56 |
........RAP 09 Scan Operation Test Failure |
57 |
........RAP 10 LED Test Failure |
58 |
........RAP 11 Tone Send Test Failure |
59 |
........RAP 12 High Speed Modem Test Failure |
60 |
........RAP 13 Multi-Frequency Send Test Failure |
61 |
........RAP 14 Voice Message Test Failure |
62 |
........RAP 15 No Acoustic Line Monitor |
63 |
........RAP 16 Document Does Not Feed |
64 |
........RAP 17 Multiple Document Feeds |
65 |
........RAP 18 Document Skews |
66 |
........RAP 19 Document Jams |
67 |
........RAP 20 Problems Shown On LCD Display |
68 |
............RAP 20A Cover Open |
69 |
............RAP 20B Printer Alarm 1 |
70 |
............RAP 20C Printer Alarm 2 |
71 |
............RAP 20D Printer Alarm 3 |
72 |
............RAP 20E Printer Alarm 4 |
73 |
............RAP 20F Paper Jam |
74 |
............RAP 20G No Paper Cassette |
75 |
............ Action Items For LCD Display Problems |
76 |
........RAP 21 Image Problems |
77 |
............RAP 21A Poor Print Quality (Images Light Or Blurred |
78 |
As A Whole) |
|
Table of Contents |
Page |
|
|
............RAP 21B Dark Background Density |
79 |
............RAP 21C Printed Output Is Blank |
80 |
............RAP 21D Vertical Black Stripes On Printed Output |
81 |
............RAP 21E Repetitive Spaced Marks On Printed Output |
82 |
............RAP 21F Vertical White Streaks On Printed Output |
83 |
............RAP 21G Areas Missing From Printed Output |
84 |
............RAP 21H Poor Fusing |
85 |
2.6 Tests |
86 |
....2.6.01 Self-Diagnosis |
87 |
....2.6.02 Sensor Calibration / Scanning Check |
88 |
....2.6.03 LED Test |
89 |
....2.6.04 Tone Test |
90 |
....2.6.05 High-Speed Modem Transmit Test |
91 |
....2.6.06 High-Speed Modem Receive Test |
92 |
....2.6.07 Multi-Frequency Send Test |
93 |
....2.6.08 Print Test |
94 |
....2.6.09 Voice Message Test |
95 |
2.7 Reports - General Information |
96 |
....2.7.02 Service Codes List (Activity Report) |
97 |
....2.7.03 Protocol Dump |
98 |
........Facsimile Control Field Conversion Table |
99 |
2.8 Resets |
100 |
....2.8.01 General Information |
101 |
....2.8.02 Toner Counter Reset |
102 |
....2.8.03 Drum Counter Reset |
103 |
....2.8.04 Fuser Counter Reset |
104 |
....2.8.05 System Reset |
105 |
2.9 Technical Function Settings |
106 |
....List Of Technical Functions - Okifax 2200 |
107 |
....List Of Technical Functions - Okifax 2400/2600 |
108 |
....2.9.02 Service Bit / Service Parameter |
109 |
........Bit Assignments Table |
110 |
2.10 Tel / Fax Automatic Switching |
111 |
2.11 Touch Tone Mode |
112 |
2.12 Dialing Parameters |
113 |
2.13 User Functions |
114 |
....2.13.02 Dual Access Combination Table - Okifax 2400/2600 |
115 |
2.14 General Operation Diagrams |
116 |
3 Disassembly & Maintenance |
|
Disassembly & Maintenance - General Information |
117 |
3.2 Disassembly/Assembly Procedures |
118 |
....3.2.01 Preliminary Items |
119 |
....3.2.02 Doc. Stay Guide Assembly; Rear And Terminal Cap |
120 |
Covers |
|
Table of Contents |
Page |
|
|
....3.2.03 Right Side Cover And Speaker |
121 |
....3.2.04 Network Control Unit |
122 |
....3.2.05 Left Side Cover Assembly |
123 |
....3.2.06 Cradle Assembly |
124 |
....3.2.07 Hook Switch Board |
125 |
....3.2.08 Memory Board |
126 |
....3.2.09 Control Panel Assembly And Paper Guide (U) |
127 |
....3.2.10 Feed, Pinch Roller; Tension Arm; Adf Spring, B-Up |
128 |
Plate |
|
....3.2.11 Separation Rubber |
129 |
....3.2.12 Cover (U) |
130 |
....3.2.13 ADF, SUB, And Sensor Rollers; Paper Guide & |
131 |
Releases |
|
....3.2.14 Verification Stamp, Paper Guide (E), And Feed |
132 |
Roller(2) |
|
....3.2.15 Contact Image Sensor Assembly |
133 |
....3.2.16 Gear Frame Assembly And Scan Motor |
134 |
....3.2.17 PC-1, PC-2, And Pinch Roller |
135 |
....3.2.18 Release Guide Assembly And Sub-Cover (Right) |
136 |
....3.2.19 Main Control Board, Second Tray Interface Board |
137 |
....3.2.20 Lower Base Assembly |
138 |
....3.2.21 Stacker Cover And Led Head |
139 |
....3.2.22 Feed Guide, Eject Roller, And Fusing Unit |
140 |
Assemblies |
|
....3.2.23 Motor Assembly, Resist Motor, And Main Motor |
141 |
....3.2.24 Pressure & Transfer Rollers, Idle Gears, Cover Open |
142 |
Arm, Reset Levers |
|
....3.2.25 Registration Roller, Sensor Plates, Damper Cover |
143 |
Arm, Gear |
|
....3.2.26 Line Board And Network Control Board |
144 |
....3.2.27 Printer Control Board And Fan |
145 |
....3.2.28 PS Board, Cassette Tray Assm., & Cassette Sensor |
146 |
Plate |
|
3.3 Adjustments And Service Settings |
147 |
3.4 Cleaning |
148 |
3.5 Lubrication |
149 |
A Board Diagrams |
|
Board Diagrams |
150 |
A.2 Index To Charts |
151 |
....A.2.01 Main Control Board (MCNT-250) Okifax 2200 |
152 |
....A.2.02 Main Control Board (DFCU) Okifax 2400/2600 |
153 |
....A.2.03 Printer Control Board (PCNT-250) Okifax 2200 |
154 |
....A.2.04 Printer Control Board (DFPU) Okifax 2400/2600 |
155 |
....A.2.05 Network Control Unit (NCU) |
156 |
Table of Contents |
Page |
|
|
....A.2.06 Power Supply Board (PWU) |
157 |
....A.2.07 Memory Board (MT-25) Okifax 2200 |
158 |
....A.2.08 Memory Board (DFME) Okifax 2400/2600 |
159 |
....A.2.09 Line Interface Board (LINE) |
160 |
....A.2.10 Connector Board (CB-250) |
161 |
....A.2.11 Interconnect Diagrams (2200) |
162 |
........Okifax 2200 - 2 Of 5 |
163 |
........Okifax 2200 - 3 Of 5 |
164 |
........Okifax 2200 - 4 Of 5 |
165 |
........Okifax 2200 - 5 Of 5 |
166 |
....A.2.12 Interconnect Diagrams (2400/2600) - 1 Of 6 |
167 |
........Okifax 2400/2600 - 2 Of 6 |
168 |
........Okifax 2400/2600 - 3 Of 6 |
169 |
........Okifax 2400/2600 - 4 Of 6 |
170 |
........Okifax 2400/2600 - 5 Of 6 |
171 |
........Okifax 2400/2600 - 6 Of 6 |
172 |
B Illustrated Parts |
|
B.1 Illustrated Parts Listing - General Information |
173 |
....B.1.02 Definitions Of Terms |
174 |
....B.1.03 Parts Ordering Information |
175 |
B.2 Charts |
176 |
....B.2.01 Cabinet Assembly (1 Of 2) |
177 |
....B.2.02 Cabinet Assembly (2 Of 2) |
178 |
....B.2.03 Control Panel Assembly (Okifax 2200) |
179 |
....B.2.04 Control Panel Assembly (Okifax 2400/2600) |
180 |
....B.2.05 Printer Assembly (1 Of 3) |
181 |
....B.2.06 Printer Assembly (2 Of 3) |
182 |
....B.2.07 Printer Assembly (3 Of 3) |
183 |
....B.2.08 Base Assembly (1 Of 2) |
184 |
....B.2.09 Base Assembly (2 Of 2) |
185 |
....B.2.10 Scan Assembly (1 Of 2) |
186 |
....B.2.11 Scan Assembly (2 Of 2) |
187 |
....B.2.12 Scan Unit (1 Of 3) |
188 |
....B.2.13 Scan Unit (2 Of 3) |
189 |
....B.2.14 Scan Unit (3 Of 3) |
190 |
....B.2.15 Upper Paper Guide Assembly (1 Of 2) |
191 |
....B.2.16 Upper Paper Guide Assembly (2 Of 2) |
192 |
....B.2.17 Cables |
193 |
....B.2.18 Options |
194 |
....B.2.19 Packaging |
195 |
....B.2.20 Consumables |
196 |
....B.2.21 Documentation |
197 |
B.2.3 UST-500 Illustrated Parts List |
198 |
....B.2.31 Assembly View |
199 |
Table of Contents |
Page |
|
|
|
|
....B.2.32 Section 1: Cabinet Assembly |
200 |
|
....B.2.33 Section 2: Mechanical Unit |
201 |
|
....B.2.34 Section 3: Cassette Assembly |
202 |
|
C Installation of Options |
|
|
C.1 |
Overview |
203 |
C.2 |
Option Installation |
204 |
....C.2.02 UST-500 (Second Paper Cassette Unit) |
205 |
|
........UST-500 Testing Procedure |
206 |
|
....C.2.03 SIO-45 Board (RS232-C Interface) |
207 |
|
C.3 |
Telephone Answering Device (TAD) Interface |
208 |
Page: 2
Service Guide OF2200/2400/2600
Chapter 0 About This Manual
This document may not be reproduced without the written permission of the Okidata® 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)
Page: 3
Service Guide OF2200/2400/2600
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)
Page: 4
Service Guide OF2200/2400/2600
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)
Page: 5
Service Guide OF2200/2400/2600
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)
Page: 6
Service Guide OF2200/2400/2600
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)
Page: 7
Service Guide OF2200/2400/2600
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)
Page: 8
Service Guide OF2200/2400/2600
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)
Page: 9
Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation
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)
Page: 10
Service Guide OF2200/2400/2600
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)
Page: 11
Service Guide OF2200/2400/2600
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)
Page: 12
Service Guide OF2200/2400/2600
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)
Page: 13
Service Guide OF2200/2400/2600
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)
Page: 14
Service Guide OF2200/2400/2600
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)
Page: 15
Service Guide OF2200/2400/2600
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)
Page: 16
Service Guide OF2200/2400/2600
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)
Page: 17
Service Guide OF2200/2400/2600
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)
Page: 18
Service Guide OF2200/2400/2600
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)
Page: 19
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)
Page: 20
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)
Page: 21
Service Guide OF2200/2400/2600
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)
Page: 22
Service Guide OF2200/2400/2600
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)
Page: 23
Service Guide OF2200/2400/2600
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)