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Section 2
Fault Analysis Procedures
Also called Repair Analysis Procedures, this section contains the basic
troubleshooting information that a technician needs to isolate the root cause of a
specific symptom.
2.1 Troubleshooting
The tables that follow are arranged in order of the normal operational sequence.
2.1.1 General
One of the first rules of troubleshooting is to first understand the normal operating
sequence of the machine (see Principle of Operation). Then carefully listen to the key
operator's description of the problem or complaint. Follow this by your own visual
observation. The cause of the problem can be determined by noting at which point in
the operating cycle the problem occurred. To pinpoint the problem to a defective
electrical component or mechanical part, use the Troubleshooting Guide and the
Electrical Schematic Diagram.
During any service call, it is a good practice to check the cable connections for fit and
alignment.
Table 2.1 General Troubleshooting
Symptom
No indication of power.
No indication of power, unit is
plugged in.
Probable Cause
Not plugged in
Main control board, a minimum of 2 of the 3
LEDs on this board should be lit, if not,
board is bad.
Display panel or cable.
Door not making interlocks.
Die Set not making switch
Jumper on the main control board is not set
to the proper line voltage.
Ensure that power cord is properly
connected to the machine as well as the
supply voltage.
Check the power supplied from the outlet.
Replace main control board.
Inspect or replace.
Inspect or replace.
Inspect or replace.
Change the jumper to the proper line
voltage.
47
Corrective Action
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