Rice Lake Lift Truck/Pallet Jack Scales - Intercomp PW800 - Manual (Page 19)

PW800, Users
Rev O, January, 2008
19
Problem: scale “locks up”
Fix:
The microprocessor (U1) may need to be replaced. The microprocessor support
circuitry could also be bad.
Problem: weights jump or drift
Fix:
Try increasing the sample rate as described in the calibration section (pg. 13). If this
does not help, the problem could be a bad load cell, defective amplifier (U5), bad A/D
chip (U6), or contamination on the circuit board.
Problem: printer doesn’t work
Fix:
Check the cable for bad connections. Check the printer for power. If the PW800 has
sufficient power, the problem is probably the power supply board for the printer (there is
separate circuit board for the printer power supply). Check the voltage regulator and the
other components.