Oki OKIFAX4550 User manual

41309401TH Rev.4 1 / 592
OKIFAX4550/
OKIOFFICE87
Maintenance Manual
2001-05-08 Rev.4
Oki Data Corporation

41309401TH Rev.4 2 /
Rev.No. Date Corrected items Person in
Section Page Description of change charge
1 2000-03 ISSUE E3 Endo
2 2000-07-21 Change the APPENDIX D. EF Oba
3 2000-10-31 Add the OKIOFFICE87, etc. EF Saito
4 2001-05-08 Change the APPENDIX D. NP3 Oba
Document Revision History

41309401TH Rev.4 3 /
This manual is intended to be used for installing and maintaining OKIFAX4550/OKIOFFICE87
facsimile transceiver.
MaintenanceoftheOKIFAX4550/OKIOFFICE87isassumedtobeconductedatthefollowinglevels:
• Assembly-level maintenance for mechanical portions
• Unit-level maintenance for electrical at portions
CAUTION: DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED.
REPLACE ONLY WITH THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE
MANUFACTURER. DISCARDUSEDBATTERIESACCORDINGTOTHEMANUFACTURER'S
INSTRUCTIONS
and
ATTENTION: ILYADANGERD'EXPLOSIONS'ILYAREMPLACEMENTINCORRECTDE
LA BATTERIE. REMPLACER UNIQUEMENT AVEC UNE BATTERIE DU MEME TYPE OU
D'UNT TYPE RECOMMANDE PAR LE CONSTRUCTEUR. METTRE AU REBUT LES
BATTERIES USA GEES CONFORMEMENT AUX INSTRUCTIONS DU FABRICANT.
Programming procedures of the following user's functions are not described in this maintenance
manual.
Please refer to user's guide.
• One-touch key programming
• Two-digit auto dial programming
• Group setting
• Programming mail box password
• Memory operation
ODA/OEL, INT'L MODEL NAME
• OKIFAX4550
• OKIOFFICE87
© Copyright 2000 Oki Data Corporation
This manual is subject to alteration without prior notification.
PREFACE

41309401TH Rev.4 4 /
CONTENTS
1. GENERAL INFORMATION ................................................................................. 8
1.1 General Performance...........................................................................................................8
1.2 General User's Functions ....................................................................................................11
1.3 General Maintenance Functions ..........................................................................................14
1.4 General Appearance............................................................................................................15
1.5 Basic Performance Specifications .......................................................................................17
1.6 Reports and Lists .................................................................................................................27
2. INSTALLATION PROCEDURE .......................................................................... 57
2.1 Setup Information.................................................................................................................57
2.1.1 General ...................................................................................................................57
2.1.2 Site Selection ..........................................................................................................59
2.1.3 Unpacking ...............................................................................................................61
2.1.4 Identification Contents ............................................................................................63
2.1.5 Installation of Attachments......................................................................................64
2.1.6 AC Cord Connection ...............................................................................................69
2.1.7 Telephone and Line Connections ...........................................................................70
2.1.8 Packing for Shipment..............................................................................................70
2.2 Programming and Initial Settings .........................................................................................71
2.2.1 Initial Settings..........................................................................................................71
2.2.1.1 General Procedure of Key Operation.....................................................71
2.2.1.2 Technical Functions................................................................................75
2.2.1.3 Technical Functions Example.................................................................90
2.2.1.4 User’s Functions ....................................................................................99
2.2.1.5 User's Functions Example......................................................................122
2.2.1.6 Clock Adjustment ...................................................................................131
2.2.1.7 Dual Access Operation...........................................................................132
2.2.1.8 System Data Programming ....................................................................133
2.2.1.9 Dial Parameters Settings .......................................................................135
2.2.1.10 Off-line Tests ..........................................................................................139
2.2.1.11 On-line Tests ..........................................................................................141
3. BRIEF TECHNICAL DESCRIPTION ................................................................... 144
3.1 Fundamentals of the Electro-Photographic Process............................................................145
3.2 Actual Electo-photographic Process ....................................................................................147
3.3 Boards and Units .................................................................................................................148
3.3.1 Boards and Units ....................................................................................................148
3.4 Overall Dimension and Mechanical Structure of OKIFAX4550/OKIOFFICE87 ...................150
4. MECHANICAL DISASSEMBLY AND REASSEMBLY......................................... 151
4.1 Precautions for Parts Replacement .....................................................................................151
4.2 Tools ....................................................................................................................................153
4.3 How to Disassemble and Reassemble ................................................................................153
4.3.1 LED Print Head .......................................................................................................157
4.3.2 ID Unit, Rear-Cover, Cover-Main, Board-NCU or Board-G4N................................158
4.3.3 Unit-046 OPE-Panel ...............................................................................................160
4.3.4 Separation Rubber, Roller Assembly Sensor .........................................................161
4.3.5 Roller Assembly-ADF, CIS (contact image sensor), Lever-PC1 and PC2..............162
4.3.6 Board-46F, Board-R46 Power Supply Unit, Board HV-P6L....................................165
4.3.7 Printer Unit Section .................................................................................................166
4.3.8 Transfer Roller ........................................................................................................167
4.3.9 High-Voltage Power Supply Unit (HV-P2H) ............................................................168
4.3.10 Holder Assembly.....................................................................................................169
4.3.11 Plate-Side M and Gear-Idle ....................................................................................170
4.3.12 Registration Roller ..................................................................................................171
4.3.13 Drive Shaft E (Eject) and Eject Roller .....................................................................172
4.3.14 Heat Assembly........................................................................................................173
4.3.15 Pressure Roller B (Back Up Roller) ........................................................................174

41309401TH Rev.4 5 /
4.3.16 Hopping Shaft Assembly.........................................................................................175
4.3.17 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assembly .........................176
4.3.18 Printer Unit ..............................................................................................................177
5. ADJUSTMENTS .................................................................................................. 178
5.1 Setting of LED Print Head Drive Time .................................................................................178
5.2.1 Confirmation Items..................................................................................................179
5.2.2 Measurement ..........................................................................................................180
6. CLEANING AND MAINTENANCE ...................................................................... 182
6.1 Replacement of Consumable...............................................................................................182
6.2 Routine Inspection ...............................................................................................................184
6.3 Printer Counter Display/Clear ..............................................................................................186
6.4 Printer Counter Display/Clear ..............................................................................................188
6.5 Local Test ............................................................................................................................189
6.5.1 When G4 option board is not installed. ................................................................... 189
6.5.2 When G4 option baord is installed. ......................................................................... 190
6.6 Self-diagnosis Test ..............................................................................................................191
6.6.1 Self Diagnosis Report .............................................................................................192
6.7 Sensor Calibration Test .......................................................................................................194
6.8 LEDs Test ............................................................................................................................196
6.9 Tone Send Test ...................................................................................................................197
6.10 High-speed Modem Send Test ............................................................................................198
6.11 High-speed Modem Receive Test........................................................................................200
6.12 MF Send Test ......................................................................................................................201
6.13 Tone (TEL/FAX)...................................................................................................................202
6.14 Protocol Dump Data Printing ...............................................................................................203
6.14.1 G3 Protocol Dump ..................................................................................................204
6.14.2 Analysis from the data ............................................................................................207
6.14.3 FCF (Facsimile Control Field) conversion table......................................................208
6.14.4 G4 Protocol Dump ..................................................................................................209
6.15 System Reset.......................................................................................................................212
6.16 Service Codes......................................................................................................................213
6.16.1 G3 Service Code List ..............................................................................................214
6.16.2 G4 Service Code Lists ............................................................................................217
7. TROUBLESHOOTING AND REPAIR FOR OKIFAX4550/OKIOFFICE87 .......... 220
7.1 Overall Troubleshooting Flow Chart ....................................................................................222
7.2 No LCD Operation ...............................................................................................................223
7.3 Alarm LED On......................................................................................................................224
7.4 Printing Test Failure.............................................................................................................225
7.5 No Local Copy .....................................................................................................................226
7.6 Auto Dial Failure ..................................................................................................................227
7.7 Transmission Problem .........................................................................................................228
7.8 Auto Reception Failure ........................................................................................................229
7.9 Reception Problem ..............................................................................................................230
7.10 Sensor Calibration Test .......................................................................................................231
7.11 LED Test ..............................................................................................................................232
7.12 Tone Send Test ...................................................................................................................233
7.13 High-speed Modem Test......................................................................................................234
7.14 MF Send Test ......................................................................................................................236
7.15 Tone (TEL/FAX) Send Test .................................................................................................237
7.16 No Acoustic Line Monitor .....................................................................................................238
7.17 Power Supply Unit ...............................................................................................................239
7.18 No Document Feeding .........................................................................................................239
7.19 Multiple Document Feeding .................................................................................................240
7.20 Document Skew...................................................................................................................241
7.21 Document Jam.....................................................................................................................243
7.22 Printer Unit ...........................................................................................................................244
7.22.1 Precautions .............................................................................................................244
7.22.2 Troubleshooting Flow Charts of Printer Unit ...........................................................245

41309401TH Rev.4 6 /
8. DIPSWITCHS SETTING TABLES FOR EN9/INU NCU BOARDS...................... 261
APPENDIX A PC BOARD DESCRIPTIONS AND OPERATION ........................... 271
1. Unit Configuration and Block Diagram.....................................................................................271
1.1 The unit configuration is as follows:...............................................................................274
1.2 Function of Each Unit ....................................................................................................275
2. Explanation of Signal Flow ......................................................................................................278
2.1 OKIFAX4550 .................................................................................................................278
2.2 OKIOFFICE87 ...............................................................................................................294
3. 46F Circuit Diagram (OKIFAX4550) ........................................................................................310
3.1 46F Circuit Diagram (1/13) ............................................................................................310
3.2 46F Circuit Diagram (2/13) ............................................................................................311
3.3 46F Circuit Diagram (3/13) ............................................................................................312
3.4 46F Circuit Diagram (4/13) ............................................................................................313
3.5 46F Circuit Diagram (5/13) ............................................................................................315
3.6 46F Circuit Diagram (6/13) ............................................................................................316
3.7 46F Circuit Diagram (7/13) ............................................................................................318
3.8 46F Circuit Diagram (8/13) ............................................................................................321
3.9 46F Circuit Diagram (9/13) ............................................................................................322
3.10 46F Circuit Diagram (10/13) ..........................................................................................324
3.11 46F Circuit Diagram (11/13) ..........................................................................................325
3.12 46F Circuit Diagram (12/13) ..........................................................................................329
3.13 46F Circuit Diagram (13/13) ..........................................................................................330
4. R46 Circuit Diagram (OKIOFFICE87)......................................................................................331
4.1 R46 Circuit Diagram (1/15, 2/15, 3/15)..........................................................................331
4.2 R46 Circuit Diagram (4/15)............................................................................................ 332
4.3 R46 Circuit Diagram (5/15)............................................................................................ 333
4.4 R46 Circuit Diagram (6/15)............................................................................................ 334
4.5 R46 Circuit Diagram (7/15)............................................................................................ 335
4.6 R46 Circuit Diagram (8/15, 9/15)................................................................................... 337
4.7 R46 Circuit Diagram (10/15)..........................................................................................340
4.8 R46 Circuit Diagram (11/15)..........................................................................................341
4.9 R46 Circuit Diagram (12/15)..........................................................................................343
4.10 R46 Circuit Diagram (13/15) ..........................................................................................344
4.11 R46 Circuit Diagram (14/15) ..........................................................................................348
4.12 R46 Circuit Diagram (15/15) ..........................................................................................349
5. OPE (04W) Circuit Diagram.....................................................................................................350
6. Power Supply Unit ...................................................................................................................351
6.1 MPW1446 (230V)/MPW1546 (120V) Circuit Diagram................................................... 351
7. P2H Circuit Diagram ................................................................................................................353
7.1 High-voltage section ......................................................................................................... 354
7.2 Photosensors.................................................................................................................355
7.3 Cover open circuit..........................................................................................................355
8. EN9 and INU Circuit Diagram ..................................................................................................356
8.1 EN9 circuit diagram .......................................................................................................358
8.2 INU circuit diagram ........................................................................................................361
8.3 Outline of Parallel Pick Up.............................................................................................364
9. G4N-PCB.................................................................................................................................365
APPENDIX B DESCRIPTIONS OF PRINT OPERATION...................................... 367
1. Electro-Photographic Processor ..............................................................................................367
2. Electro-Photographic Process .................................................................................................369
2.1 Explanation of Each Process Operation........................................................................ 372
3. Paper Jam Detection ...............................................................................................................378
4. Toner Low Detection................................................................................................................380
5. Cover Open..............................................................................................................................381
APPENDIX C CIRCUIT DIAGRAMS...................................................................... 382
APPENDIX D MECHANICAL EXPANDED VIEW DRAWING AND PARTS LIST . 427

41309401TH Rev.4 7 /
APPENDIX E BOARD LAYOUT AND PARTS LIST .............................................. 456
APPENDIX F PC-LOADING .................................................................................. 516
1. General ....................................................................................................................................516
1.1 Application .....................................................................................................................516
1.2 General..........................................................................................................................516
1.3 Note on Explanation ......................................................................................................516
1.4 Related Document......................................................................................................... 516
2. Basic Operation .......................................................................................................................517
2.1 Supported Functions .....................................................................................................517
2.2 Differences from HSLS.................................................................................................. 517
3. PC Loading Procedure ............................................................................................................518
3.1 PC Loading upon Memory Error Occurrence ................................................................518
3.2 PC Loading by Manual Operation .................................................................................519
4. LCD Messages ........................................................................................................................521
5. Buzzer Sounding Patterns .......................................................................................................522
5.1 Upon Start of PC Loading..............................................................................................522
5.2 Upon Normal End ..........................................................................................................522
5.3 Upon Error Occurrence .................................................................................................522
6. List of Error Causes and Corresponding Codes ......................................................................523
7. Cautions...................................................................................................................................524
8. Loading Processing Time ........................................................................................................524
APPENDIX G RMCS SYSTEM MANUAL (FOR MODEL 40) ................................ 525
1. Notes to RMCS user ................................................................................................................525
1.1 Introduction....................................................................................................................525
1.2. System Configuration of RMCS MODEL40 ................................................................... 525
1.3 Required System ...........................................................................................................525
2. Quick Set-up manual for RMCS Model 40...............................................................................526
2.1 RMCS Installation..........................................................................................................526
3. Startup .....................................................................................................................................526
3.1 Entering Operator ID .....................................................................................................526
3.2 Entering Password ........................................................................................................526
4. SYSTEM Main Screen .............................................................................................................527
4.1 Screen Titles..................................................................................................................527
4.2 DISK by Models.............................................................................................................528
4.3 Manipulating User Information.......................................................................................528
5. Model Main Screen ..................................................................................................................530
5.1 Screen Title ...................................................................................................................530
5.2 ONLINE Operation ........................................................................................................530
APPENDIX H OKIFAX4550/OKIOFFICE87 TROUBLESHOOTING MANUAL...... 533
1. General ....................................................................................................................................533
2. Tools ........................................................................................................................................533
3. Contents...................................................................................................................................533
3.1 46F Board (OKIFAX4550) .............................................................................................533
3.2 R46 Board (OKIOFFICE87)...........................................................................................534
3.3 O4W Board....................................................................................................................534
3.4 G4N Board.....................................................................................................................534
4. Description ...............................................................................................................................535
4.1 46F Board (OKIFAX4550) .............................................................................................535
4.2 R46 Board (OKIOFFICE87)...........................................................................................547
4.3 04W Board.....................................................................................................................559
4.4 G4N Board.....................................................................................................................561

41309401TH Rev.4 8 /
1. GENERAL INFORMATION
1.1 General Performance
(1) Type of appearance
• Desktop type
(2) Applicable lines
• Public switched telephone network (PSTN)
• Private branch exchange (PBX)
• ISDN (Integred service digital network)
• Fax2Net Internet Fax (via PSTN)
Note: ISDN and Internet Fax are option
(3) Compatibility
• ITU-T Group 3 facsimile transceiver
• ITU-T Group 4 facsimile transceiver (option)
(4) Document width
• Max. 216 mm (NA Letter)
• Min. 148 mm (ISO A5 size)
(5) Effective reading width
TX
• Max. 215 mm (NA Letter)
• Max. 208 mm (ISO A4 size)
COPY
• 203.2 mm (NA Letter)
• 203.2 mm (ISO A4 size)
(6) Scanning length
• 128 mm to 356 mm
(Length setting: Unlimited (1500mm) is also available.)
(7) Automatic document feeder (ADF)
• 20 sheets (NA Letter/A4-size: 20-1b bond/75 gm. Oki Data recommended paper)
• 15 sheets (NA Letter/A4-size: 16 to 28-1b bond/60-105 gm)
Note: NA is North America
(8) Recording paper or sheet
• 1st tray: NA Letter/NA Legal/A4-size plain paper cut
100 sheets capacity (20-1b bond*)
• Manual paper feeder: Transparency for overhead projector, applicable.
Sheet size: NA Letter/NA Legal/A4-size
*: Oki Data recommended paper
(9) Printable width
• NA Letter: 203.2 mm (203.2 mm for assured quality)
• NA Legal: 203.2 mm (203.2 mm for assured quality)
• ISO A4: 203.2 mm (197.3 mm for assured quality)
(10) Printable length
• NA Letter: 273.4 mm (266.7 mm for assured quality)
• NA Legal: 349.6 mm (342.9 mm for assured quality)
• ISO A4: 291.0 mm (284.3 mm for assured quality)
(11) Copy stacker
• Max. 30 sheets (Faceup stacking)
*: Oki Data recommended paper

41309401TH Rev.4 9 /
(12) Scanning resolution
a) Horizontal:
• 300 dot/inch
Note 1: In the local COPY mode at standard (STD) resolutions, the dpi conversion
is done from 300 dot/inch to 200 dot/inch.
2: 600 dpi ×15.4 line/mm: Copy is available for OKIOFFICE87.
b) Vertical:
Transmission mode: 3.85 line/mm (STD), 7.7 line/mm (FINE), 15.4 line/mm (EX.FINE)
or 300 dot/inch (EX.FINE)
COPY mode: 3.85 line/mm (STD), 7.7 line/mm (FINE) or 15.4 line/mm (EX.FINE)
Note: 300 dpi ×300 dpi: Transmission is available.
(13) Scanning method
• 2592 bits contact image sensor
(14) Recording resolution
a) Horizontal:
• 300 dot/inch
• 600 dot/inch for OKIOFFICE87
b) Vertical:
Variable: Automatically adjusted to the paper length.
(784 to 1076 dot/inch), (300 to 395 dot/inch), STD mode (3.85 to 5.06
line/mm) and FINE mode (7.7 to 10.13 line/mm) and EX-FINE mode
(15.4 to 20.24 line/mm)
Fixed: STD mode: 3.85 line/mm
FINE mode: 7.7 line/mm
EX-FINE mode: 15.4 line/mm
300 dot/inch
(15) Recording method
• 211.3 mm (2496 bits) and/or 216.7 mm (2560 bits) LED print head
(16) Minimum scan line time for reception
• When receiving from OKIFAX or ECM: 0 ms
• When receiving from non- OKIFAX and non ECM: 10 ms at 3.85 line/mm
5 ms at 7.7 line/mm, 15.4 line/mm
(17) Print speed
• Max. 8 sheets per minute (at NA letter size)
(18) Pre-heating time
• Approx. 30 sec. (Standby to Print)
Note: This feature is not available OKIFAX4550/OKIOFFICE87 for ODA version.
(19) Coding scheme
• Modified Huffman (MH)
• Modified READ (MR)
• Modified Modified READ (MMR)

41309401TH Rev.4 10 /
(20) Modem
• ITU-T Rec. V.29: 9600 bps for use on point-to-point 4-wire leased telephone
type curcuits.
• ITU-T Rec. V.27 ter: 4800 bps modem for use in PSTN (Public Switched
Telephone Network)
• ITU-T Rec. V.21 channel 2: 300 bps duplex modem for PSTN
• ITU-T Rec. V.17: 2-wire modem for fax applications up to 14.4 kbps
• ITU-T Rec. V.34: A modem operating at data signalling rates of up to 33.6
Kbps for use on the general switched telephone network and
on leased point-to-point 2-wire telephone-type circuits.
• ITU-T Rec. V.33: 14400 bps for use on point-to-point 4-wire leased telephone
type circuits.
(21) Transmission speed
• 3 sec. (approx 3.2 sec) per sheet of ITU-T No. 1 evalution test chart
Note: This is Phase C time at 3.85 line/mm and 33600 bps for 3 sec. in MMR code
transmission.
(22) Protocol
• ITU-T Rec. T.30
• ITU-T Rec. G4 class 1 (option)
• OKI special protocols: High-speed protocol (G3)
(23) Error correction scheme
• ITU-T ECM
(24) Communication mode
• Half duplex
(25) Image memory
• Basic model: 2M byte
(26) Liquid crystal display (LCD)
• Two rows of 20 characters for operation guidance, check and various kinds of information
(27) Power source
• Nominal input voltage 120 VAC for ODA version
• Nominal input voltage 230 VAC for INT’L version
(28) MFP (Multi- Function Peripheral) functions:
PC Printer Function
PC Scanner Function
PC Fax Modem Function
Location Programing Function
Note: For details, see “Product Specification for MFP”
This function is standard for OKIOFFICE87.
(29) FAX2NET functions:
• FAX over IP Function
• FAX to E-mail Function
• Virtual E-mail Function
• Broadcast function
• Web Retrieval Function
• Prepaid Card Registration (Note 2)
Note1: For details, see Appendix I “FAX2NET Function”.
2: May not used according to dealer's conditions.

41309401TH Rev.4 11 /
1.2 General User's Functions
(1) Transmit mode
• Automatic transmit mode
• Manual transmit mode
(2) Receive mode
• Automatic receive mode
• Manual receive mode
• TEL/FAX automatic switchover mode
• TAD mode
• Memory only receive mode
• Forwarding mode
• PC receive mode (This function is the standard for OKIOFFICE87)
(3) Instant dial
(4) Advanced T.30 protocol
(5) Dual access
(6) Automatic redial
(7) Last number redial (Manual redial)
(8) Local copy of a document, including multiple copies
• 50 copies max.
(9) Sender identification (Sender ID)
(10) Personal identification (Personal ID)
(11) Polling transmission
• Feeder Polling transmission
• Memory Polling transmission
(12) Polling reception
(13) Bulletin polling
(14) Acoustic line monitor
(15) Automatic alternate selecting call (FAX No. + FAX No. can be registered in one-touch keys).
(16) Delayed transmission (Max. 3 days)
• Delayed broadcast
• Delayed transmission
5 specified times
(17) Relay broadcast initiate
(18) Confidential message transmission
(19) Confidential message reception
8 mail boxes
(20) PHOTO mode (at FINE resolution)
64 scale gradations

41309401TH Rev.4 12 /
(21) G3 sequential broadcast (Memory)
• Broadcast mode
90 stations at maximum for OKIFAX4550
120 stations at maximum for OKIOFFICE87
• Delayed broadcast mode
(22) No paper/no toner reception
(23) Memory-only reception
(Memory reception even if paper does not run out)
(24) Distinguishing text from picture
(25) Page re-transmission (Only in case of memory TX mode)
(26) Vertical reduction printing (Reduction rate is from 100% to 75%)
(27) Horizontal reduction (RX, copy : Reduction rate is from 93% to 98%)
(28) Smoothing printing (In case of 8 dots/mm ×3.85, 7.7 or 15.4 lines/mm →300 dot/inch ×784
line/inch)
• Turns off in the PC print mode.
(29) Programmed key operation (“F” key + “OT” key)
(30) Auto dialing
• One-touch dialing 10 locations
• Two-digit automatic dialing 70/100 locations for OKIFAX4550/OKIOFFICE87
• Keypad dialing
• Chain dialing
• Mixed dialing
• Group dialing 5 groups
(31) Real-time dialing
Dialing with telephone off the hook or when the Hook key is pressed.
(32) Automatic pause signal insertion
(33) Manual feeder local copy
(34) Telephone directory (Alpha search) dialing
(35) TEL/FAX automatic switching
(36) Time and date printing
(37) Closed users group (Direct mail rejection)
(38) Transmission contrast and resolution control
(39) Key touch tone
(40) Printer counter display (For drum, toner, total print)
(41) Total page counter (Scan)
(42) Quick scanning 6 sec. minimum →A4 size 3.85R/mm
(43) Time and date setting

41309401TH Rev.4 13 /
(44) PC interface
• Standard: OKIOFFICE87
• Option: OKIFAX4550
Note: Hardware is mounted.
(45) Language selection
• 2 languages (LCD and Reports)
(46) Reports
• Activity report
• Active memory files report
• Protocol report
• Message confirmation report (Single address and multiple addresses)
• Broadcast entry report (Broadcast)
• Broadcast confirmation report
• Transmission error report
• Confidential reception report
• Configuration report
• Telephone directory
• Power outage report
• Log.report (service bit=ON)
• G4 Log.report (service bit=ON)
(47) Restricted access
(48) Continuous alarm tone

41309401TH Rev.4 14 /
1.3 General Maintenance Functions
1) Local tests
(1) Self-diagnosis
• CPU ROM/RAM check
• FLASH memory check (Program, Language, Default)
• RAM check
• Print test
(2) Sensor calibration (Adjustment of scanning level)
(3) LEDs test
(4) Tone send test (When NCU board is installed.)
(5) Multi-frequency (MF) send test (When NCU board is installed.)
(6) High-speed modem send test (When NCU board is installed.)
(7) High-speed modem receive test (When NCU board is installed.)
(8) Tone (TEL/FAX) test (When NCU board is installed.)
(9) Loop back 1 (When G4 option board is installed.)
(10) Loop back 2 (When G4 option board is installed.)
(11) INFO 0 sending (When G4 option board is installed.)
(12) INFO 1 sending (When G4 option board is installed.)
(13) INFO 3 sending (When G4 option board is installed.)
(14) Pulse (1KHz) send (When G4 option board is installed.)
(15) Pulse (2KHz) send (When G4 option board is installed.)
(16) Pulse (N2KHz) send (When G4 option board is installed.)
2) Technical function
3) System reset
• All data clear
• Location data clear
• Configuration data clear
4) Default type set
5) PC loading
6) G4 PC loading

41309401TH Rev.4 15 /
Tray-Paper
Tray-Document
Cover-Top
Cover-Front
Stacker-Document
Cover Manual Document
Cover-Main
Case-OPE (T)
Figure 1.1 General Appearance of OKIFAX4550/OKIOFFICE87
1.4 General Appearance
Figure 1.1 shows the general appearance of the OKIFAX4550/OKIOFFICE87.
Figure 1.2 shows the control panel of the OKIFAX 4550.

41309401TH Rev.4 16 /
Figure 1.2 Control Panel of OKIFAX 4550
UNIQUE
8.5" A4 B5 A5
OKIFAX
AUTO REC SEARCH AUTO DIAL
HYPHEN REDIAL
HOOK
V.REQUEST
PHOTO EX FINE FINE STD LIGHT NORMAL DARK ALARM
STOP START
YES
YES
NO
NO
OKI
*0#
ABC DEF
JKL MNO GHI
TUV WXYZ
PQRS
789
456
123
SELECT
FUNCTION
DELAYED
TX
REPORT
PRINT
PRINT
OPERATION
COUNTER
DISPLAY
CONF.TX
LOCATION
PROG.
RELAY
INIT.-TX
USER
PROG.
POLLNG
PRINTER
CLEANING
10/PAUSE
9/SPACE8/+7
6
54
321
COPY
4550

41309401TH Rev.4 17 /
1.5 Basic Performance Specifications
Table 1.1 shows basic performance specifications.
Note: TF: Technical function setting
FP: Function program setting
OT: One-touch key pressed
F: SELECT FUNCTION key pressed
Table 1.1 (1/11) Basic Performance Specifications
No. Item Specifications
1 Applicable line
2 Line interface
1) Impedance
2) Sending power level
3) Receiving power level
3 Type of document to be transmit-
ted
1) Width
2) Length
3) Thickness
4) Shape
5) Opacity
1) Public switched telephone network (PSTN)
2) Private branch exchange (PBX) (OT9+2)
600Ωbalanced
Note: Impedance may differ by the requirement of PTT.
0 dBm to –15 dBm range
(Adjustable in 1 dB steps. TF + 21)
0 dBm to –40 dBm or -6 dBm to -43 dBm: for V.17, V29 and
V.27 ter. (In case of V.34 TX/RX, -3dBm to -36dBm)
Max. 216 mm (NA Letter)
Min. 148 mm (ISO A5 size)
Note: Effective reading width is NA Letter (215 mm).
Min. 128 mm
Max. 356 mm (14 inches)
Long document detection: 380 mm, or 1500 mm
*TF +10 (Toenableor disablethe longdocumentscanning)
Based on common bond paper
a) 0.08 to 0.13 mm for multiple page feeding
b) 0.06 to 0.15 mm for single page feeding
Rectangular
Documents allowing less than 40% of the scanner source
light to pass through them.

41309401TH Rev.4 18 /
Table 1.1 (2/11) Basic Performance Specifications
No. Item Specifications
Document width Communication
Mode/Paper width Effective reading
width Copy size
ISO A4 (210 mm)
[INT'L/FTZ] G3/A4 A4
208 mm for TX
203.2 mm for local copy
(208 mm for local copy with
Horizontal Reduction = ON)
NA letter (216 mm)
[US/CANADA] G3/A4 Letter
NA legal (216 mm)
[US/CANADA] G3/A4 Legal
215 mm for TX
203.2 mm for local copy
(214 mm for local copy with
Horizontal Reduction = ON)
215 mm for TX
203.2 mm for local copy
(214 mm for local copy with
Horizontal Reduction = ON)
Note: Local copy: Printable reading width in local copy mode
4 Effective reading width
Max. 20 documents for OKIFAX4550/OKIOFFICE87: NA
Letter or A4 (20-1b/75 gm)
Max. 15 documents:
NA Letter or A4 (16-28 lb/60-105 gm bond paper)
Documents shall be placed facedown on ADF stacker.
The first sheet will be fed first in the feeder and will exit
facedown in the document stacker.
Max. 1 mm skew over any advance of 100 mm. The
occurence of skew exceeding 1 mm per 100 mm shall be
0.5% or less.
1) Transmissionwillstopandlinedisconnectionwilloccur
when the end of a document is not detected within 356
mmafterscanningbegins(exceptforthelongdocument
scanning. TF + 10)
2) A jam will also be declared if the document does not
reach the scanning position within 10 seconds after the
start of a document feed.
Note: When a jam is detected during message transmis-
sionfromthefeeder,themachinewillstopscanning
and disconnect the line, but its receiving capability
will remain valid.
Manual release
5 Automatic document feeder (ADF)
6 Document skew
7 Document jam detection
8 Document jam removal

41309401TH Rev.4 19 /
Table 1.1 (3/11) Basic Performance Specifications
No. Item Specifications
9 Recording paper or sheet
10 Recording paper cassette
For tray-paper:
1) Type: Plain paper cut (Bond paper)
2) Size: ISO A4 (210 mm ×297 mm)
NA Letter (215.9 mm ×279.4 mm)/(8.5 inch
×11 inch)
NA Legal (215.9 mm ×355.6 mm)/(8.5 inch
×14 inch)
3) Weight: 16 lb-24 lb/60-90 gm base weight
Base weight is defined as the weight of 500
sheets of 431.8 mm (17 inch) by 558.8 mm
(22 inch) or 1 sheet size 1000 mm by 1000
mm.
4) Thickness: 0.08 mm to 0.12 mm
5) Condition: New paper
For the manual loading feeder
1) Type: Plain paper, transparency for overhead pro-
jector, colored paper, printed paper
2) Size: A4/NA Letter/NA Legal
3) Weight, thickness and condition: Same as above
Note: One single sheet should be loaded on the manual
paper feeder for one occasion.
For best results use Oki Data recommended papers
1) Xerox 4200 (20 - lb/75 gm base weight paper)
2) L-type paper for photo-printers
100 sheets/tray (Oki Data recommended paper)

41309401TH Rev.4 20 /
Table 1.1 (4/11) Basic Performance Specifications
No. Item Specifications
2) Guaranteed printing area
Printing area
EL
PL
B
T
LR
PW
EW
Recording
paper
feed
direction
1) Printable area
PL 11 279.4 11.7 297 14 355.6
inch mm inch mm inch mm
NA LETTER SIZE ISO A4 SIZE 14 inch LEGAL SIZE
PW 8.5 216 8.27 210 8.5 216
EL 10.76 273.4 11.46 291 13.76 349.6
EW 8.0 203.2 8.0 203.2 8.0 203.2
T 0.12 3 0.12 3 0.12 3
B 0.12 3 0.12 3 0.12 3
L 0.25 6.35 0.13 3.4 0.25 6.35
R 0.25 6.35 0.13 3.4 0.25 6.35
13 inch LEGAL SIZE
13
inch mm
8.5
12.76
8.0
0.12
0.12
0.25
0.25
330.2
216
324.2
203.2
3
3
6.35
6.35
PL 11 279.4 11.7 297 14 355.6
inch mm inch mm inch mm
NA LETTER SIZE ISO A4 SIZE 14 inch LEGAL SIZE
PW 8.5 216 8.27 210 8.5 216
EL 10.5 266.7 11.2 284.3 13.5 342.9
EW 8.0 203.2 7.77 197.3 8.0 203.2
T 0.25 6.35 0.25 6.35 0.25 6.35
B 0.25 6.35 0.25 6.35 0.25 6.35
L 0.25 6.35 0.25 6.35 0.25 6.35
R 0.25 6.35 0.25 6.35 0.25 6.35
13 inch LEGAL SIZE
13
inch mm
8.5
12.5
8.0
0.25
0.25
0.25
0.25
330.2
216
317.5
203.2
6.35
6.35
6.35
6.35
11 Effective recording area
Note: Thesetablesdonotinclude
vertical and horizontal
addressingdeviations(+or
-3 mm) of recording paper.
12 Copy stacking Thefax candischarge printedcopiesandstackthem faceup.
Maximum sheets on the copy stacker: 30*
Note*: Oki Data recommended paper