Firmware

Firmware Suite


The Firmware Suite is available for download.

Applicable models

B721; B731; ES7131; MPS5501b

* The firmware update tool is also required for update after the firmware is downloaded.

Download the firmware update tool >


To download the Firmware Suite, you must agree to the following "Software License Agreement". Be sure to read before downloading.

Read the Software License Agreement >

Specifications

File name OKI_B731_A02.55_0_4_239565.bin
Version A02.55_0_4
File size 26,437,653 Byte
MD5 hash value 554063f8dca68d679f992ac11903abbd

Update history

Firmware Ver.A02.55_0_4
  CU:A2.55
  PU:00.00.31
  Network/WebRemote:A1.24/A1.25
  IM:01.05
  Wireless:01.70

1. Fixed a problem that the image may come out scrambled with using PS driver for macOS 10.14.
2. Fixed a problem that WSD can not be disabled.

----------

Firmware Ver.A02.54_0_4
  CU:A2.54
  PU:00.00.31
  Network/WebRemote:A1.24/A1.24
  IM:01.05
  Wireless:01.70

1.Improved function.

----------

Firmware Ver.A02.53_0_4
  CU:A2.52
  PU:00.00.31
  Network/WebRemote:A1.24/A1.24
  IM:01.05
  Wireless:01.70

1.Treatment of the WPA2 protocol vulnerabilities.

----------

Firmware Ver.A02.52_0_4
  CU:A2.52
  PU:00.00.31
  Network/WebRemote:A1.24/A1.24
  IM:01.05
  Wireless:01.50

1. Fixed a problem when using Airprint on Mac OS or iOS, printing job has been finished. But actually no output from the printer.

----------

Firmware Ver.A02.50_0_4
  CU:A2.50
  PU:00.00.31
  Network/WebRemote:A1.22/A1.24
  IM:01.05
  Wireless:01.50

1. Fixed a problem that printer sends unnecessary reply to a certain command.
2. Fixed a problem that error 002 occurs when printing a specified font.
3. Fixed a problem that a user-defined character cannot be printed through PS printer driver.
4. Fixed a problem that incorrect line is printed on a character when printing a specified PDF file.
5. Fixed a problem that a specified data cannot be printed with PS error.
6. Fixed a problem that PS error(invalidfont) occurs when printing a specified PDF file.

----------

Firmware Ver.A02.33_0_4
  CU:A2.32
  PU:00.00.31
  Network/WebRemote:A1.22/A1.24
  IM:01.05
  Wireless:01.50

1. Fixed a problem where after printing orientation settings on panel menu is set to landscape and machine is rebooted, settings will show landscape but the printed output will be portrait.
2. Delete the menu of PowerSetup-> PowerSave item.

----------

Firmware Ver.A02.27_0_4
  CU:A2.25
  PU:00.00.29
  Network/WebRemote:A1.21/A1.23
  IM:01.05
  Wireless:01.50

1. Measures for the problem that a fatal error occurs when the Printer receives illegal Multicast DNS packet which is sent from Android4.4.x terminal.
2. Support a R&TTE standard revision. (a European radio standard change from January, 2015)

----------

Firmware Ver.A02.22_0_4
  CU:A2.23
  PU:00.00.28
  Network/WebRemote:A1.20/A1.21
  IM:01.05
  Wireless:01.40

1. Added support for AirPrint.
2. Added support for search function of the wireless network.(Wireless LAN model only)
3. Added support for E-mail printing.


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