SM 04L01A01-01E
5-1
5
TROUBLESHOOTING
5.1 Procedure/5.2 Flow Chart
Chapter 5 Troubleshooting
This chapter explains the causes of problems and how to identify faulty assemblies
through self diagnosis and troubleshooting.
5.1 Procedure
1
Determine the type of problem.
2
Check for possible user error. Check the connections and the settings of equipment
to determine whether there was a handling mistake.
3
Execute the self diagnostic test by turning the power ON, and identfy any problem
items.
4
Analyze the cause of the problem according to the troubleshooting flow chart.
Do not touch the circuit or parts with live voltage because the power unit contains a high-
voltage electrical circuit. The power unit is furnished with a dedicated cover to prevent
electric shock. Do not remove this cover. Never touch any part not subject to
adjustment.
Make sure to connect input terminals (voltage or current) correctly. The internal circuit
may be damaged when wrongly connected.
5.2 Flow Chart
This flow chart consists of general service operations when a fault occurs. This chart is
not always suitable for every kind of fault. However, it is recommended to perform
operations according to the flow chart.
START
END
YES
YES
NO
NO
Phenomenon check
Cause check
Assembly exchange and
adjustment
Performance test execution
Repaired?