User manual

PICDEM™ MC LV
DEVELOPMENT BOARD
© 2006 Microchip Technology Inc. DS51554B-page 31
Chapter 8. Troubleshooting
8.1 HIGHLIGHTS
This item discussed in this chapter is:
Common Problems
8.2 COMMON PROBLEMS
8.2.1 The Power LED D7 is Not Lit
Check the PICDEM MC LV Development Board for power:
Check the power supply and make sure it is connected to the board.
Check the power cable and make sure it is plugged into the outlet.
Check and verify that the power source is working properly.
If using a power supply other than the one supplied by Microchip, check the power
supply polarity.
Disconnect the power to the board. Using an ohmmeter, check for any short
circuits between the power (V
DD) and return path (VSS). If a short exists, do not
proceed any further. Contact Microchip’s local office or distributor.
Disconnect power and motor connections from the board. Using an ohmmeter,
check for any short circuits between the motor terminals, M1-M2, M1-M3 and
M2-M3. If a short does exist, do not proceed any further. Contact Microchip’s local
office or distributor.
8.2.2 The Motor Control GUI Cannot Communicate with the Board
Check the PICDEM MC LV Development Board and make sure it is receiving
power.
Check the serial cable for proper connections to the board and the computer.
Verify the cable is connected to the correct serial port on the computer. If
necessary, check the serial cable by swapping in another cable that is known to
be good.
Verify, through Windows
®
Device Manager (accessed through the system applet
in the Control Panel), that the selected COM port is recognized by the operating
system and is working.
Confirm that the correct serial port is being used. Check that the COM port
selected in the terminal software is actually the physical port the serial cable is
connected to.
Verify the baud rate; try choosing a lower rate.
Check the monitor LEDs flash briefly on Reset or power-up of the board.
If all other settings and connections are correct, try resetting the board and
restarting the Motor Control GUI.