Oki OKIFAX 5950 Series Maintenance Manual page 7

7.10 Sensor Calibration Test .......................................................................................... 7-13
7.11 LED Test ................................................................................................................ 7-14
7.12 Tone Send Test ...................................................................................................... 7-15
7.13 High-speed Modem Test ........................................................................................ 7-16
7.14 MF Send Test ........................................................................................................ 7-18
7.15 Tone (TEL/FAX) Send Test .................................................................................... 7-19
7.16 No Acoustic Line Monitor ...................................................................................... 7-20
7.17 Power Supply Unit ................................................................................................ 7-21
7.18 No Document Feeding .......................................................................................... 7-22
7.19 Multiple Document Feeding .................................................................................. 7-23
7.20 Document Skew .................................................................................................... 7-24
7.21 Document Jam ...................................................................................................... 7-26
7.22 Printer Unit ............................................................................................................ 7-27
7.22.1 Precautions ........................................................................................................... 7-27
7.22.2 Troubleshooting Flow Charts of Printer Unit .......................................................... 7-28
7.23 G3 Dual Line Troubleshooting Flow Chart ............................................................ 7-48
7.24 Auto Dial Failure (G3 Dual Line) ........................................................................... 7-49
7.25 Transmission Problem (G3 Dual Line) .................................................................. 7-50
7.26 Auto Reception Failure (G3 Dual Line) ................................................................. 7-52
7.27 Reception Problem (G3 Dual Line) ....................................................................... 7-53
7.28 High-speed Modem Test (G3 Dual Line) ............................................................... 7-55
7.29 MF Send Test (G3 Dual Line) ................................................................................ 7-57
7.30 No Acoustic Line Monitor (G3 Dual Line) .............................................................. 7-58
Appendix A PC Board Decriptions and Operation
A1.1 Unit Configuration and Block Diagram ................................................................... A1-1
A2.1 OKIFAX 5750/5950 Signal Flow ............................................................................ A2-1
A2.2 Explanation of Signal Flowchart ............................................................................ A2-21
A3.1 MCNT .................................................................................................................... A3-1
A3.2 OPE Control .......................................................................................................... A3-36
A3.3 MODEM C34 PC Board ........................................................................................ A3-37
A3.4 UNC, WN5, FN5 and DN5 Circuit Diagram ........................................................... A3-42
A3.5 Power Supply Board ............................................................................................. A3-55
A3.6 High-voltage Power Supply Circuit ........................................................................ A3-57
A3.7 G4A-PCB .............................................................................................................. A3-59
A3.8 G3A-PCB .............................................................................................................. A3-61
Appendix B Description of Print Operations for OKIFAX 5750/5950
B.1 Mechanical Components ....................................................................................... B-1
B.2 Description of Print Operations ............................................................................. B-2
B.2.1 Process Operations ............................................................................................... B-2
B.3 Errors .................................................................................................................... B-13
B.3.1 Errors List .............................................................................................................. B-13
B.3.2 Major Trouble Errors ............................................................................................. B-14
B.3.2.1 Fuser Error ............................................................................................................ B-14
B.3.2.2 Fan Error ............................................................................................................... B-14
B.3.2.4 2'nd Tray Communication Error ............................................................................. B-15
B.3.2.5 Cover Open ........................................................................................................... B-15
B.3.2.3 Paper Feed Monitoring .......................................................................................... B-15
B.3.3 Recoverable Errors ............................................................................................... B-16
B.3.3.1 Toner Low Detection ............................................................................................. B-17
B.4 Other Special Cases ............................................................................................. B-19
B.4.1 Manual Paper Feed ............................................................................................... B-19
B.4.2 Cleaning ................................................................................................................ B-19
OF5750/5950 Series January 2001 5