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PN- U523/U473/U423    FIRMWARE UPDATE PROCEDURES    5 - 8 

 

 

10)  How to Confirm Firmware Version on SERVICE MENU 

Display “SERVICE MENU1” screen while displaying screen image. Confirm firmware version on” MODEL/VERSION” menu. 

 

To display “SERVICE MENU1”, press and hold [SIZE] key on remote control (for approx. 5 seconds). Once "F" appears on upper left 

of the screen, press [

←], [↓], [→], [↑] keys in series. 

 

Press [MENU] key on remote control to close “SERVICE MENU1” after confirmation of firmware version. 

 

SERVICE1 

SERVICE2 

MODEL/VERSION 
 

MODEL  ：  PNxxxxx      S/N  ：  XXXXXXXX 
VER(MAIN)：    VER 1.000    C/S：  4DB4 
VER(SUB)  ：  VER 1.000    C/S：  8ACF 
VER(LAN)  ：  VER 1.000    C/S：  8ACF 
VER(CPLD)  ：  VER 1.00 

 
 
 

 

 

 

 

BACK・・・[RETURN] 

SERVICE3 

SERVICE4 

PN- U523/U473/U423    FIRMWARE UPDATE PROCEDURES    5 - 9 

 

 

3. How to update LAN firmware via RS-232C cable                                 

 

 

The operating condition of Firmware Updater for information display is as listed below. 

OS

 

Windows XP, Windows Vista, Windows 7 (32bit only.) 

Communication Port 

RS-232C port which is recognized as COM port 

(with communication speed: 115Kbps) 

 

The RS-232C cable required for the update is shown below. Connect COM port on PC and RS-232C input terminal on display using the 

cable. 

RS-232C cable: Straight cable (D-Sub 9 pin connector female - female) 

 

 

11)  Go to COMMUNICATION SETTING -> RS-232C/LAN SELECT in OSD menu and set to “RS-232C”. 

12)  Click on “LAN Firmware” on Service Tool Launcher and activate “LAN Micon Writing Assistance Tool”. 

 

RS-232C input terminal 

Computer 

Connect to COM port

RS-232C straight cable (commercial item) 

PN- U523/U473/U423    FIRMWARE UPDATE PROCEDURES    5 - 10 

 

 

13)  Select the COM port used for communication. 

Caution: The firmware update does not work if COM port is set to COM 1. If communication port for RS-232C is set to COM1, change 

Ports setting in Device Manage to COM2 - COM9. 

Click on “BATCH” key. 

 

14)  Go to “SETUP” -> “COMMUNICATION SETTING” -> RS-232C/LAN SELECT using remote control and set to “RS-232C”. 

15)  Click on “OK” on dialog box after changing the setting. 

 

16)  Display “SERVICE2” menu using remote control. Then set “FIRMWARE UPDATE” to “ON”. 

To display “SERVICE” screen, press and hold [SIZE] key on remote control (for approx. 5 seconds). Once "F" appears on upper left of 

the screen, press [

←], [↓], [→], [↑] keys in series. 

17)  Click on [OK] on dialog box after changing the setting. 

   

18)  Go to “SETUP” -> “COMMUNICATION SETTING” -> “RS-232C/LAN SELECT” using remote control and set to “LAN”. 

PN- U523/U473/U423    FIRMWARE UPDATE PROCEDURES    5 - 11 

 

 

19)  Click on [OK] key on dialog box after changing the setting. 

 

20)  Writing tool “AX220ISP” is activated. 

Ensure that communication port is set properly. 

Do not change communication speed from 115.2K. 

 

Continue the operation even if following message appeared after the activation.