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Document No. 028
TROUBLESHOOTING FOR KPG-22U, KPG-36U, KPG-43U AND KPG-46U
The assigned COM port number is too large. Is there any other way to change the
COM port number?
Follow the procedure below to delete the reserved COM port number.
1. Start up the PC, and then make sure that Windows XP, Windows Vista or Windows 7 is properly
running.
2. For Windows XP: Click "Start" > "Run".
For Windows Vista and Windows 7: Click "Start" and then click "Search programs or files" box.
3. For Windows XP: Enter "cmd" and then click the "OK" button.
The command prompt starts.
For Windows Vista and Windows 7: Enter "cmd" by using a keyboard, right-click "cmd" in the
searched program list, and then click "Run as Administrator". The command prompt starts.
4. Enter the following commands and then start the Device Manager.
set devmgr_show_nonpresent_devices=1
cd c:\windows\system32
start devmgmt.msc
5. Click the "View" menu in the Device Manager, and then click "Show hidden devices".
6. Right-click and delete an unnecessary reserved COM port number since all devices, including
those not connected to the PC, are visible. Be careful not to delete necessary devices.
Note: For Windows Vista and Windows 7, the administrative privilege is required to do the above operations.
Is KPG-22U, KPG-36U, KPG-43U or KPG-46U equivalent to the serial cable
(KPG-22A, KPG-36A, KPG-43A or KPG-46A) in terms of the time required for writing
and reading data?
The communication time significantly varies depending on the PC and the configured baud rate.
Also, it may take longer if the firmware is written by using KPG-22U, KPG-36U, KPG-43U or
KPG-46U and the corresponding FPRO (Version 6.00 or later).
© Kenwood Corporation
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