Epson AP-60 Sound Enhancement System Product Support Bulletin page 4

3. Open the C:\EPSON\epson13644_ap60_downloader_firmware_13 to find the three files:
a) BTLD_Test.exe
b) Btldtest.ini
c) DSP_code.hex
4. Open btldtest.ini file and verify the COM Port number.
It should match the COM Port number noted in the previous step.
If the COM Port number does not match the settings in Step 2 above, make the changes
then save the file and close the window.
5. Launch BTLD_Test.exe
If the wrong port number is entered in the window shown in the previous step, the
following error message will display.
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PSB.2010.01.001