CUES MPlus+ - Page 93

B
CUES Inc., MPlus+ User Manual | CH905 
www.cuesinc.com, | salesinfo@cuesinc.com
APPENDIX B
TROUBLESHOOTING:
The following is a list of the error messages provided by the MPlus rmware update
program, along with a description of what each indicates and some potential causes.
NOTES:
. All of the below error messages can, additionally, be caused by communication problems
with the attached USB Flash drive, which can be caused by poor connection between the
contacts in the drive and those in the USB connector.
. If the error message description does not provide a solution, try pulling the USB Flash
drive out and plugging it back in, and then retry the procedure from step .
. If failures persist, retry the procedure from the beginning with a dierent USB Flash drive.
• NO USB DEVICE FOUND
o A USB device is not plugged into the USB port, J, on the circuit board attached to the
underside of the keyboard panel.
• USB COMMUNICATION ERROR
o The system is having unspecied problems communicating with the attached USB
device.
• UNSUPPORTED CONFIG DSCRPTR
o The ‘Conguration Descriptor’ data received from the USB device was too large to t
into the internal buer.
o This is an uncommon error that should only occur when using a non-standard USB
Flash drive or when the attached USB device is something else entirely.
• UNSUPPORTED USB DEVICE
o The attached USB device has not been identied as a ‘Mass Storage Device’, which is
the standard classication for USB Flash drives.
o Check the state of the slide switch, S, on the circuit board attached to the underside
of the keyboard panel. Make sure it is set to the ‘UPD’ position for performing the
rmware update.
• UNSUPPORTED LOG BLOCK LEN
o The ‘Logical Block Length’ reported by the USB Flash drive is not equal to the value,
 bytes, supported by the MPlus rmware update program.
o This is an uncommon error that should only occur when using a non-standard USB
Flash drive.
• UNSUPPORTED NUM LOG BLOCKS
o The number of ‘Logical Blocks’ reported by the USB Flash drive exceeds the maximum
number supported by the MPlus rmware update program.
o If the drive’s ‘Logical Block Length’ is the standard  bytes, this equates to
approximately TB of memory capacity.