Oki Data MB760 49 PPM Mono MFP Printer Service Manual

Oki Data MB760 49 PPM Mono MFP Printer

ABOUT OKI

OKI is a Japanese multinational corporation that specializes in the manufacturing and distribution of a wide range of products, including telecommunications equipment, printers, and information technology solutions. The company’s full name is Oki Electric Industry Co., Ltd., and it is commonly referred to as OKI.

Here are a few key points about OKI:

1. History: OKI was founded in 1881 as a telecommunication equipment provider in Japan. Over the years, it expanded its product portfolio and became a prominent player in the global technology industry.
2. Products and Services: OKI offers a diverse range of products and services across multiple sectors. Its main product lines include printers (laser printers, dot matrix printers, and multifunction printers), telecommunications systems (telephones, PBX systems), and information technology solutions (networking equipment, software solutions).
3. Printer Technology: OKI is known for its innovative printer technology. It has developed unique LED print head technology that offers high-quality prints with improved energy efficiency and compact design.
4. Global Presence: OKI operates globally, with subsidiaries and offices in various countries. It has a significant presence in North America, Europe, Asia-Pacific, and other regions, serving customers in both consumer and business markets.
5. Business Solutions: OKI provides customized business solutions tailored to meet the specific needs of various industries, such as healthcare, retail, finance, and telecommunications. These solutions encompass document management, network infrastructure, and communications systems.
6. Commitment to Sustainability: OKI is committed to sustainability and environmental responsibility. The company focuses on developing eco-friendly products, reducing carbon emissions, and promoting recycling and waste reduction.

Transportation/Installation

• When transporting/installing the equipment, employ two or more persons and be sure to hold the positions as shown in the figure. The equipment is quite heavy and weighs approximately 55 kg (121.23 lb.) (including the finisher), therefore pay full attention when handling it.
• Be sure not to hold the movable parts or units (e.g. the control panel, ADU or RADF) when transporting the equipment.
• Be sure to use a dedicated outlet with AC 110V/15A, 120V/12A, 220-240V/8A for its power source.
• The equipment must be grounded for safety.
• Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration, and direct sunlight.
• To ensure adequate working space for the copying operation, keep a minimum clearance of 30 cm (12”) on the left, 30 cm (12”) on the right, and 60 cm (24”) on the rear.
• The equipment shall be installed near the socket outlet and shall be accessible.
• Be sure to fix and plug in the power cable securely after the installation so that no one trips over it.
• If the unpacking place and where the equipment is to be installed differ, perform image quality adjustment (automatic gamma adjustment) according to the temperature and humidity of the place of installation and the paper to be used.
• If the equipment has casters, lock them after the installation.

General Precautions at Service

• Be sure to turn the power OFF and unplug the power cable during service (except for the service should be done with the power turned ON).
• Unplug the power cable and clean the area around the prongs of the plug and socket-outlet once a year or more. A fire may occur when dust lies in this area.
• When the parts are disassembled, reassembly is the reverse of disassembly unless otherwise noted in this manual or other related documents. Be careful not to install small parts such as screws, washers, pins, E-rings, star washers, and harnesses in the wrong places.
• Basically, the equipment should not be operated with any parts removed or disassembled.
• The PC board must be stored in an anti-electrostatic bag and handled carefully using an antistatic wrist strap since the ICs on it may be damaged due to static electricity.
  Caution: Before using the antistatic wrist strap, unplug the power cable of the equipment and make sure that there are no charged objects which are not insulated in the vicinity.
• Be sure not to touch high-temperature sections such as the fuser unit and areas around them.
• Be sure not to touch high-voltage sections such as chargers, transfer belts, developers, high-voltage transformers, and power supply units. Especially, the board of these components should not be touched since the electric charge may remain in the capacitors, etc. on them even after the power is turned OFF.
• Make sure that the equipment will not operate before touching potentially dangerous places (e.g. rotating/operating sections such as gears, belts pulleys, and fans).
• Be careful when removing the covers since there might be parts with very sharp edges underneath.
• When servicing the equipment with the power turned ON, be sure not to touch live sections and rotating/operating sections.
• Use designated jigs and tools.
• Use recommended measuring instruments or equivalents.
• Return the equipment to its original state and check the operation when the service is finished.
• Be very careful to treat the touch panel gently and never hit it. Breaking the surface could cause malfunctions.

Important Service Parts for Safety

The door switch, fuse, thermostat, Thermo fuse, thermistor, batteries, IC-RAMs including lithium batteries, etc. are particularly important for safety. Be sure to handle/install them properly. If these parts are short-circuited and their functions become ineffective, they may result in fatal accidents such as burnout. Avoid short-circuiting and do not use parts not recommended by OKI DATA Corporation.

SPECIFICATIONS/SYSTEM LIST

Notes: In this document, a model name is replaced with an alias as follows:

Model name	Alias
MB760	H-290
MB770, ES7170MFP, MPS5502mb	H-291

General

Memory (RAM)	Main memory	2 GB
	Page Memory	None
HDD		160 GB
Account Codes		10000 codes
Department Codes		1000 codes
Machine version		OEL, ODA, AOS

HDD Memory Map

Category		Item		Unit	HDD
HDD		HDD		GB	160
	Copy	Memory copy		GB	30
	Box	e-Filing		GB	80 (Shared with e-filing/Storage file)
			Public box	Box	1
			User box	Box	200
			Folders per box	Folder	100
			Documents per box	Document	400
			Pages per document	Page	200
			Number of maximum jobs	Job	899
	Scan	Scan to File		GB	80
			Pages per job	Page	1000
			Number of maximum jobs	Job	899 (Except Print/FAX/interrupt)
	FAX	FAX Transmission		GB	1 (Shared with Rx and Tx)
		FAX Reception		GB	1 (Shared with Rx and Tx)
	Print	Printer Data Spool		GB	25
			Pages per job	Job	Storage full
			Number of maximum jobs	Job	1000
		Job area		GB	80 (Shared with e-filing/Storage file)
			Pages per job	Job	Storage full
			Number of maximum jobs	Job	1000

System List

SELF-DIAGNOSTIC MODE

Starting each mode

To enter the desired mode, turn the power ON while pressing two digital keys designated to each mode (e.g. [0] and [5]) simultaneously. Hold the two keys until the [PRINT DATA] lamp is lit. On the authentication screen displayed after starting up each mode, enter the service password, and then press [OK]. The password is not set by default. Refer to “Appendix” for the codes in Test mode (03), Test print mode (04), Adjustment mode (05), and Setting mode (08).

Exiting from each mode

Shut down the equipment. When the power should be turned OFF, be sure to shut down the equipment by pressing the [ON/OFF] button for a few seconds.

List of modes

Mode	For start	Contents	For exit	Display
Control panel check mode	[0] + [1] + [POWER]	All LEDs on the control panel are lit, and all the LCD pixels blink.	[POWER] OFF/ON	–
Test mode	[0] + [3] + [POWER]	Checks the status of input/output signals.	[POWER] OFF/ON	100% C TEST MODE
Test print mode	[0] + [4] + [POWER]	Outputs the test patterns.	[POWER] OFF/ON	100% P A4 TEST PRINT
Adjustment mode	[0] + [5] + [POWER]	Adjusts various items.	[POWER] OFF/ON	100% A A4 TEST MODE
Setting mode	[0] + [8] + [POWER]	Sets various items.	[POWER] OFF/ON	100% D TEST MODE
Maintenance mode	[6]+[8]+ [POWER]	Maintains the scanner unit (SU) and printer unit (PU)	[POWER] OFF/ON	–
Assist mode	[3]+[C]+ [POWER]	Clears error flags or SRAM, or safely deletes data in the HDD or SRAM to support the replacement of the SYS board, SRAM or HDD.	[POWER] OFF/ON	–
HDD assist mode	[4]+[CLEAR]+ [POWER]	Assists the ADI-HDD by checking the type of the mounted HDD, reverting the HDD to a factory default or removing keys.	[POWER] OFF/ON	–
File system recovery mode	[5] + [C] + [POWER]	Checks, recovers or initializes the file system (HDD).	[POWER] OFF/ON	–
SRAM clear mode	[6]+[CLEAR]+ [POWER]	Recovers the equipment from particular errors such as F800 or F900.	[POWER] OFF/ON	–
List print mode	[9] + [START] + [POWER]	Prints various lists or outputs them in a CSV format.	[POWER] OFF/ON	100% L A4 LIST PRINT
Firmware update mode	[4] + [9] + [POWER]	Performs firmware update with USB device.	[POWER] OFF/ON	–
	[8] + [9] + [POWER]	Performs firmware update with download jig.	[POWER] OFF/ON	–
Password reset mode	[4] + [8] + [9] + [POWER]	Resets the administrator password and service password.	[POWER] OFF/ON	–
SRAM data cloning mode	[5] + [9] + [POWER]	Backs up the SRAM data to USB device.	[POWER] OFF/ON	–

Note:

Do not enter any of the modes shown below since they are provided only for production. If you do so, the equipment may not be restarted.

• [2]+[CLEAR]+[POWER]
• [7]+[CLEAR]+[POWER]
• [8]+[CLEAR]+[POWER]
• [9]+[CLEAR]+[POWER]

State transition diagram of self-diagnosis modes

1. If you have used a self-diagnostic mode, turn the power OFF before the customer starts using the equipment
2. Model shown in the table “[C] List of modes”

General description

This is a mode to operate the partitions of the HDD, initialize the SRAM data, erase the HDD/SRAM data, and back up/restore the encryption key and licenses.

Functions:

• Clearing update error flag (Clear Error Flag in Software Installation)
• Formatting data storage partition (Format Root Partition)
• Creating HDD partition (Format HDD)
• Formatting SRAM data (Clear SRAM)
• Backing up/restoring encryption key and license (Key Backup Restore)
• Erasing HDD securely (Erase HDD Securely)
• Erasing SRAM securely (Erase SRAM Securely)
• Clearing service tech password (Clear Service Tech)

Clearing update error flag (Clear Error Flag in Software Installation) Even if the firmware downloading has been completed normally, the Recovery Mode may accidentally start up, and an F600 error occurs when the power is turned ON again. In this case, clear the Update Error flags used in the download process with this function. (Normally, the flags are automatically cleared in the download process.) Also in the case the Recovery Mode accidentally starts up after the replacement of SRAM on the SYS board, the flags are cleared with this function.

Formatting data storage partition (Format Root Partition) When a defect occurs on the UI data, etc. which are stored in the HDD, the partition with the stored UI data etc. is formatted with this function. Do not use this function since it is not normally necessary. HDD data must be installed after performing this function.

Backing up/restoring encryption key and license (Key Backup Restore) When the SRAM board (for the SYS board) or the SYS board is replaced or initialized, the encryption key and license are erased. Therefore, they need to be backed up or restored
with this function. Configurations and functions of the “5. Key Backup Restore” menu.

1. Key SRAM to FROM Restore the encryption key from SRAM to FROM.
2. Key FROM to SRAM Back up the encryption key from FROM to SRAM.
3. License SRAM to FROM Restore the license from SRAM to FROM.
4. License FROM to SRAM Back up the license from FROM to SRAM.
5. ADIKey SRAM to FROM Restore the ADIKey from SRAM to FROM.
6. ADIKey FROM to SRAM Back up the ADIKey from FROM to SRAM.

This mode enables you to have the following functions:

• Check F/S: Checks the file system.
• Recovery F/S: Recovers the file system.
• Initialize HDD: Initializes partitions in the HDD.
• Initialize DB: Initializes database (LDAP DB/log DB/language DB).
• SMART Info: Displays the various information in the HDD.
• DISK Info: Displays the usage rate of HDD.
• HDD Utility: Initializes log files.

Notes:

• When “0” is keyed in and the [START] button is pressed, the menu to key in the serial number appears. Key in the serial number of this equipment and then press [OK] to determine the setting.
• Items 1 and 2 can be canceled while 0 and 3 cannot.
• When “3” is keyed in and the [START] button is pressed, the operation starts.

Notes:

Precautions when storing information in USB device.

• When storing the setting information of the equipment into a USB device, be sure to obtain from a user in advance.
• When storing the setting information of the equipment into a USB device, the information is printed out in a CSV format.
• Handle and manage the information with extra care.
• Do not lose or leak the setting information of the equipment.
• Do not use the setting information of the equipment for purposes other than maintenance or product services.
• Provide the information promptly if a user requires so.
• The buttons on the control panel keep blinking while data are being stored in the USB device.
• Do not disconnect the USB device while data are being stored.

Remarks:

In the USB storage procedure above, lists are stored in a CSV format. The names of the CSV files are shown below.

• 201: ADJUSTMENT_LIST_serial_date and time(YYYYMMDDHHMMSS).csv
• 202: SETTING_LIST_serial_date and time(YYYYMMDDHHMMSS).csv
• 206: ERROR_LOG_serial_date and time(YYYYMMDDHHMMSS).csv
• 208: FW_UPGRADE_LOG_serial_date and time(YYYYMMDDHHMMSS).csv
• 210: POWER_ONOFF_LOG_serial_date and time(YYYYMMDDHHMMSS).csv
• 211: VERSION_LIST_serial_date and time(YYYYMMDDHHMMSS).csv
• 214: TOTAL_COUNTER_LIST_serial_date and time(YYYYMMDDHHMMSS).csv

List Printing

The lists below are output in the list print mode. List data are printed out or output in a CSV format by storing them in a USB device. Paper sizes available for this printing are A4 or LT or larger. This section introduces a sample of each list. To start the list print mode, turn the power on while pressing the [9] + [START] button.

Lists	List code
	Printout	CSV file output
Adjustment mode (05) data list	101	201
Setting mode (08) data list	102	202
Error history list	106 (Maximum 1000 items)	206 (Maximum 1000 items)
Error history list	107 (Latest 80 items)	–
Firmware upgrade log	108 (Maximum 200 items)	208 (Maximum 200 items)
Power ON/OFF log	110 (Maximum 100 items)	210 (Maximum 100 items)
Version list	111	211
Total counter list	114	214
Output all CSV files	–	300
Toner replacement log	812 (Maximum 1024 items)	912 (Maximum 1024 items)

SETTING / ADJUSTMENT

Image-Related Adjustment

Adjustment Order

This chapter mainly explains the procedures for image-related adjustment. In the following diagram, the solid lines with arrows lead to essential adjustments, while the dotted lines lead to adjustments to be performed if necessary.

ERROR CODE AND TROUBLESHOOTING

This chapter explains the procedures for solving troubles occurring in the equipment. When trouble occurs, check if an error code is displayed on the LCD screen of the control panel first. If displayed, refer to“& P. 5-4 “5.2 Error Code List” to figure out the classification and contents of the error, and then refer to “& P. 5-27 “5.3 Diagnosis and Prescription for Each Error Code” to remove its cause.

If not displayed and the equipment does not operate properly or images are not printed properly, refer to “& P. 5-103 “5.4 Other errors” to remove its cause.

Note:

• If an unusual odor is detected or if smoke or fire comes out of the equipment, immediately turn the power OFF.
• Even in cases other than the above, fully observe safety precautions.
• If any PC board or HDD shall be replaced, refer to“6.3 Precautions for Installation of GP-1070 and Disposal of HDD/Board”.

Precautions

• In the High-Security Mode, an integrity check system is operated at every restart. If F521 (integrity check error) is displayed, take the necessary measures following the troubleshooting procedure.
• When a self-diagnostic mode is started in the High-Security Mode, an authentication screen appears. Enter the default user name and password as follows:
• Default user name: service
• Default password: #1048#
• If a password change screen appears, reset the password according to the rules below.
• It must not include the user name.
• It must be a combination of letters of the alphabet and numbers.
• It must be 6 characters or more. (Maximum 64 characters)
• The same character must not be repeated 4 times within the new password.
• The old and the new passwords must not be the same.
• In the High-Security Mode, restrictions are set to the following self-diagnostic codes:

Code	Contents
08-8910	The setting value is changed to “2”. “0” is not settable.
08-8911	The setting value is changed to “3”.
08-8924	The setting value is changed to “1”. Values other than “1” are not settable.
08-9110	“0” is not settable.
08-9193	If “0” is set for the value, the setting will not comply with IEEE2600.1 Security Standards Requirement.
08-9379	The setting value is changed to “1”.
08-9819	The setting value is changed to “1”. If “0” is set for the value, the setting will not comply with IEEE2600.1 Security Standards Requirement.

• In the above case, the password is not reset. The password setting can be changed with the code 08-8919.
• The HDD is initialized (and the saved user data are deleted) when the equipment returns to the normal mode from the High-Security Mode. Be sure to back up user data before having it do so.
• After the equipment enters the High-Security Mode, ask the administrator for the equipment to select [FULL] and perform the Integrity check manually

Output check (test mode 03)

Code	Function	Procedure
301	Modem test 2100Hz	2
302	Modem test 14.4KBPS(V17)	2
303	Modem test 9.6KBPS(V29)	2
304	Modem test 4.8KBPS(V27)	2
305	Modem test 300BPS	2
306	Modem test 1850Hz	2
307	Modem test 1650Hz	2
308	Modem test 1100Hz	2
309	Modem test 462Hz	2
310	Modem test 1300Hz	2
311	Modem test 33.6KBPS(V.34)	2
312	Modem test 28.8KBPS(V.34)	2
313	Modem test 24.0KBPS(V.34)	2
314	Modem test 16.8KBPS(V.34)	2
315	Dial test 10PPS	5
316	Dial test 20PPS	5
317	Dial test PB	5
318	Modem test 12.0KBPS(V.17)	2
319	Modem test 7.2KBPS(V.29)	2
320	Modem test 2.4KBPS(V.27ter)	2
321	FAX image memory test	2
322	CML relay ON	2

Adjustment Mode (05) Codes

05/ 08

Mode

Element

Sub element

Item

Subitem

Code

Sub- code

Details

Default value

Acceptable value

RAM

Contents

Proce- dure

05

Adjustment mode

Printer

Feeding system/ Paper transport

Setting method of drawer size

4800

0

1st drawer

1

0~1

SYS

0: Manual 1: Automatic

4

05

Adjustment mode

Printer

Feeding system/ Paper transport

Setting method of drawer size

4800

1

2nd drawer

1

0~1

SYS

0: Manual 1: Automatic

4

05

Adjustment mode

Printer

Feeding system/ Paper transport

Setting method of drawer size

4800

2

3rd drawer

1

0~1

SYS

0: Manual 1: Automatic

4

05

Adjustment mode

Printer

Feeding system/ Paper transport

Setting method of drawer size

4800

3

4th drawer

1

0~1

SYS

0: Manual 1: Automatic

4

05

Adjustment mode

Printer

Feeding system/ Paper transport

Setting method of drawer size

4800

4

LCF

1

0~1

SYS

0: Manual 1: Automatic

4

05

Adjustment mode

Printer

Image control

Density correction

Fine adjustment of density correction

4903

3

Black

16

13~19

PU

13: -3 14: -2 15: -1 16: 0 17: 1 18: 2 19: 3

4

05

Adjustment mode

Printer

Maintenance

4907

Setting of measure against curl

0

0~1

PU

0: Off 1: On

1

05

Adjustment mode

Printer

Image control

Fine adjustment for printing plain paper

4908

0

Black

3

0~6

PU

0: -3 1: -2 2: -1 3: 0 4: 1 5: 2 6: 3

4

05

Adjustment mode

Printer

Image control

Fine adjustment for printing transparencies

4909

0

Black

3

0~6

PU

0: -3 1: -2 2: -1 3: 0 4: 1 5: 2 6: 3

4

05

Adjustment mode

Printer

Image control

Print deviation correction

4910

0

Unevenness of print quality

3

0~6

PU

0: -3 1: -2 2: -1 3: 0 4: 1 5: 2 6: 3

4

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