Comark RF500A/AP Service Manual
Tier 3: RF500A Component Level Repair
USB Chip Verification
This test requires the “N5001USB-Tools.exe” software and paired original Silicon Labs USB drivers. Ensure a charged
battery pack is plugged in and turn on the main board (press and hold the On/Off switch for 4 seconds). Making sure no
other RF500A/AP devices are attached to the USB port of the test PC plug in the DUT to the USB port of the PC. Start
the above mentioned software and verify the following information:
ID
Item
Comments
Vid
Vendor Identification
All Comark USB product contain this hex number (1408), this
identifies the device on the USB bus as a Comark product.
Pid
Product Identification
This identifies the product to the Comark USB drivers and must be
set. All Comark USB products have a different PID.
Power Use Attributes
This tells the USB host that this device provides its own power and is
not required to be powered from the bus.
Serial Number
This should be the same serial number as identified on the main
board (see picture below) and on the side of the case front (Side View
(Serial Number Label)).
Product String
All RF500A/AP models should have this field programmed as
“RF500A”.
17 November 2011
Page 42 of 65
USB serial number
must
match case
and the software above.
