PN-R703 (serv.man5) - Sharp Monitor Service Manual (repair manual). Page 105

PN-R903/R703/R603　FIRMWARE UPDATE PROCEDURES

 5 – 6

■ GENERAL

Use of USB-serial conversion cable etc. may assign 
communication port to COM10 or more. Since a port number has
restriction depending on a service tool, it is necessary to change the
assigned port number. The modification procedure of a port number is
as follow. 
Although the procedure explained here is a thing in the case of using
the USB-Serial conversion cable (Buffalo (old Arvel), USB serial cable
(SRC06USB) and a setting item may be different depending on environ-
ment, set a procedure as reference. 

■ SETTING PROCEDURE (Windows xp)

1 ) Select “file name is specified and performed" from "start" menu.  

 

2 ) Input “devmgmt.mscÅhÅB

3 ) Press [OK] and device manager is started and "a port (COM and

LPT)" is displayed. 

4 ) By the COM port currently used, it right-clicks and a "property" is

chosen, on the property screen of COMxx, a "setting of port" tab is
chosen and a "detailed setting" button is pushed 

5 ) COM number is chosen by  "COM port number." 

(COM6 is chosen in the example of a screen)

  Choose the COM number which is not displayed in "Port (COM and 
   LPT)" of the device manager. Although COM to choose may have   
   become "in use", selection is possible when not displayed in "a port 
   (COM and LPT)." 

6 ) Choose "yes", when the following dialog is displayed 

        Setup of a communication port is completed above