Oki MB780 User manual

MB 780 / MB790
Service Guide
© 2010 OkiData Americas, Inc.
Disclaimer
Every effort has been made to ensure that the information in this document is complete, accurate, and up to date. The manufacturer
assumes no responsibility for the results of errors beyond its control. While all reasonable efforts have been made to make this document
accurate and helpful as possible, we make no warranty of any kind, expressed or implied, as to the accuracy or completeness of the
information contained herein. For the most up-to-date service information available, visit our website at www.okidata.com © Okidata
Americas, Inc. 2010
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Contents
Accessing the Service Menus Page 4
Available Diagnostic Menu Tests Page 6
REGISTRATION Page9
PRINTTESTS Page12
HARDWARE TESTS Page 14
DUPLEXTESTS Page16
INPUT TRAY TESTS Page 19
OUTPUT BIN TESTS Page 20
BASE SENSOR TEST Page 21
DEVICE TESTS Page 22
PRINTERSETUP Page23
EPSETUP Page25
REPORTS Page26
EVENTLOG Page27
SCANNERTESTS Page28
Available Configuration Menus Page 30
Maintenance Counter Value Page 31
Reset Maintenance Counter Page 31
USB Scan to Local Page 31
Print Quality Pages Page 32
Reports – Menu Settings Page 32
Reports – Event Log Page 33
Size Sensing Page 33
PanelMenus Page34
PPDS Emulation Page 34
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Factory Defaults Page 34
Energy Conserve Page 35
Min Copy Memory Page 35
NumPad Job Assist Page 35
Format Fax Storage Page 35
Fax Storage Location Page 36
ADF Edge Erase Page 36
FB Edge Erase Page 36
Scanner Manual Registration Page 37
DisableScanner Page38
Paper Prompts Page 38
Envelope Prompts Page 38
Action for Prompts Page 38
Jobs On Disk Page 39
Disk Encryption Page 39
Wipe Disk Page 40
Font Sharpening Page 40
Require Standby Page 40
LES Applications Page 40
Key Repeat Initial Delay Page 41
Key Repeat Rate Page 41
Wiper Message Page 41
Clear Custom Status Page 41
3

Accessing the Service Menus
There are different test menus that can be accessed during POR to identify problems with
the printer.
Pages 5 & 29
Page 5
4

Accessing the Diagnostics Menu
Entering Diagnostics Menu
1. Turn off the printer.
2. Press and hold 3 and 6 buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 seconds.
Exiting Diagnostics Menu
Touch Exit Diag Menu to exit the Diagnostics Menu, “Resetting the Printer” will be
displayed. The printer perform Exit
Diag Menu
Accessing the Configuration Menu
Entering Configuration Menu
5. Turn off the printer.
6. Press and hold 2 and 6 buttons simultaneously.
7. Turn on the printer.
8. Release the buttons after 10 seconds.
Exiting Configuration Menu
Touch Exit Config Menu to exit the Configuration Menu, “Resetting the Printer” will be
displayed. The printer performs a POR, and the printer returns to ready mode.
Exit
Config Menu
5

Available Diagnostic Menu Tests
The tests display on the operator panel in the order shown:
Note: Some menus are not available, depending on the configuration of the printer.
REGISTRATION See “Registration (printer)” on page 9
Top Margin
Bottom Margin
Left Margin
Right Margin
Quick Test See “Quick Test” on page 10
PRINT TESTS
Tray 1 See “Input source tests” on page 12
Tray 2 (if installed)
Tray 3 (if installed)
Tray 4 (if installed)
Tray 5 (if installed)
MP Feeder
Envelopes - MP Feeder (if installed)
Printing Print Quality Pages See “Printing Quality Pages” on page 12
HARDWARE TESTS
Panel Test See “Panel Test” on page 14
Button Test See “Button Test” on page 14
DRAM Test See “DRAM Test” on page 14
USB HS Test Mode
6

Diagnostics Menu tests (continued)
DUPLEX TESTS (if installed)
Quick Test See “Quick Test (duplex)” on page 16
Top Margin See “Top Margin (duplex)” on page 16
Sensor Test See “Sensor Test (duplex)” on page 17
Motor Test See “Motor Test (duplex)” on page 17
Duplex Feed 1 See “Duplex Feed 1” on page 17
Duplex Feed 2 See “Duplex Feed 2” on page 18
INPUT TRAY TESTS
Feed Tests See “Feed Tests (input tray)” on page 19
Tray 1
Tray 2 (if installed)
Tray 3 (if installed)
Tray 4 (if installed)
Tray 5 (if installed)
Envelope Feeder
MP Feeder
Sensor Tests See “Sensor Test (input tray)” on page 19
Tray 1
Tray 2 (if installed)
Tray 3 (if installed)
Tray 4 (if installed)
Tray 5 (if installed)
Envelope Feeder
MP Feeder
OUTPUT BIN TESTS See “OUTPUT BIN TESTS” on page 20
Feed Tests
Standard Bin
Sensor Tests
Standard Bin
BASE SENSOR TEST See “BASE SENSOR TEST” on page 21
Toner Sensor
Input Sensor
Output Sensor
Narrow Media
Front Door
DEVICE TESTS
Quick Disk Test See “Quick Disk Test” on page 22
Disk Test/Clean See “Disk Test/Clean” on page 22
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Diagnostics Menu tests (continued)
PRINTER SETUP
Defaults See “Defaults” on page 23
Printed Page Count See “Printed Page Count” on page 23
Perm Page Count See “Permanent Page Count” on page 23
Serial Number See “Serial Number” on page 23
Envelope Enhance See “Engine Settings 1 through 16” on page 23
Engine Settings 1 through 16 See “Engine Settings 1 through 16” on page 23
Model Name See “Model Name” on page 23
Configuration ID See “Configuration ID” on page 24
Edge To Edge See “Edge to Edge” on page 24
Enable Edge to Edge Copy See “Enable Edge to Edge Copy” on page 24
EP SETUP
EP Defaults See “EP Defaults” on page 25
Fuser Temp See “Fuser Temperature (Fuser Temp)” on page 25
Fuser Page Count See “Fuser Page Count” on page 25
Warm Up Time See “Warm Up Time” on page 25
Transfer See “Transfer” on page 26
Print Contrast See “Print Contrast” on page 26
Charge Roll See “Charge Roll” on page 26
Gap Adjust See “Gap Adjust” on page 26
Auto Dark Adjust See “Auto Dark Adjust” on page 26
REPORTS
Menu Settings Page See “Menu Settings Page” on page 26
EVENT LOG
Display Log See “Display Log” on page 27
Print Log See “Print Log” on page 27
Clear Log See “Clear Log” on page 27
SCANNER TESTS
Back Side Scan Uniformity See “Back Side Scan Uniformity” on page 28
ASIC Test See “Back Side Scan Uniformity” on page 28
Feed test See “Feed Test” on page 28
Sensor Tests See “Sensor Tests” on page 28
8

REGISTRATION (printer)
Previous Print registration makes sure the printing is properly aligned on the page.
The settings available are:
Description Value Direction of change
Top Margin -25 to +25 Each increment
causes approximately 4 pels
shift (at600 dpi).
A positive change moves the image down the page and
increases the top margin. A negative change moves the
image up and decreases the top margin.
Bottom
Margin
-20 to +20 Each increment
causes approximately 0.55
mm shift in the bottom
margin.
A positive change compresses the image so it appears to
move down the page, and a negative change moves the
image up.
Left Margin -25 to +25 A positive change moves the image right, and a negative
change moves the image left. No compression occurs.
Right
Margin
-10 to +10 A positive change moves the image left, and a negative
change moves the image right.
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To set print registration:
1. Print the Quick Test page.
2. Touch REGISTRATION from the Diagnostics Menu.
3. Touch to select Quick Test. You may need to scroll to the next page.
Retain this page to determine the changes you need to make to the margins settings.
The diamonds in the margins should touch the margins of the page.
To change the value of any of the margin settings:
•Touch to the right of the appropriate margin setting. The panel displays the
setting's name in the header and ◄[setting's current value] ►in a menu below
the header row.
•Touch ◄to decrease the value or ►to increase the value.
•Touch Submit to save the change, or Touch Back to cancel and return to the
Diagnostics Menu.
•Touch Submit to save all changed values.
The device prints a Quick Test page from the appropriate paper tray. While the
Quick Test page prints, Printing Alignment Page appears on the LCD.
Quick Test
The Quick Test contains the following information:
•Device information
•Printer margin settings
•Scanner margin settings
•Alignment diamonds at the top, bottom, and each side.
•Horizontal lines for skew adjustment
•General printer information, including current page count, installed memory,
processor speed, serial number, Engine ID, and system card ID.
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