TROUBLESHOOTING AND REPAIR |
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4.Test the machine to determine if the failure symptom has been corrected by the replacement PC board.
NOTE: It is desirable to have a spare (known good) PC board available for PC board troubleshooting.
NOTE: Allow the machine to heat up so that all electrical components can reach their operating temperature.
5.Remove the replacement PC board and substitute it with the original PC board to recreate the original problem.
NOTE: Do not substitute boards that show physical damage.
a.If the original problem does not reap- pear by substituting the original board, then the PC board was not the problem. Continue to look for bad connections in the control wiring
harness, junction blocks, and termi- nal strips.
b.If the original problem is recreated by the substitution of the original board, then the PC board was the problem. Reinstall the replacement PC board and test the machine.
6.Always indicate that this procedure was followed when warranty reports are to be submitted.
NOTE: Following this procedure and writing on the warranty report, “INSTALLED AND SWITCHED PC BOARDS TO VERIFY PROBLEM,” will help avoid denial of legiti- mate PC board warranty claims.
