Microchip Technology DM164123 Ficha De Dados
PICDEM SYSTEM MANAGEMENT
®
USER’S GUIDE
©
2007 Microchip Technology Inc.
DS41304B-page 19
Chapter 3. Troubleshooting
3.1
INTRODUCTION
This chapter describes common problems and resolutions associated with using the
PICDEM System Management Board.
PICDEM System Management Board.
3.2
COMMON PROBLEMS
3.2.1
Serial Communications does not appear to be working
Reset the PICDEM System Management Board by pressing the SW100 switch labeled
“MCLR.”
“MCLR.”
The PICkit Serial Analyzer must be connected to header P104 labeled “PICkit Serial.”
Ensure that the board is being powered by a 12 V
DC
power supply.
3.2.2
Microcontroller does not run after programming using the
MPLAB
MPLAB
®
ICD 2
When using the MPLAB ICD 2 as a programmer, the microcontroller will not run unless
you disconnect the MPLAB ICD 2 or release the MPLAB ICD 2 from Reset.
you disconnect the MPLAB ICD 2 or release the MPLAB ICD 2 from Reset.
3.2.3
The fan is not providing proper feedback
The 3-wire fan provides a tachometer output on the SENSE line. Ensure that the JP201
jumper connects to the center and “TACH” pins.
jumper connects to the center and “TACH” pins.
3.2.4
Heating element is not heating
Check to see that the heater is enabled. The heater should be on if the CTRL line is
high. If you are using the System Management GUI, ensure in the Temperature
Management Tab that the checkbox “Heater On” is checked.
high. If you are using the System Management GUI, ensure in the Temperature
Management Tab that the checkbox “Heater On” is checked.
Check to ensure that the “Heater Enable” jumper JP200 is in place.
3.2.5
Temperature is not changing
Check JP202 and ensure that it is connected to center pin and pin labeled MCP9700.