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.