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5-2
STEP 1. Study the machine system
Study and know how the machine is operating,
how the system is composing, what kinds of
function are installed in the machine and what
are specifications of the system components by
the machine service manual.
Especially, deepen the knowledge for the related
parts of the trouble.
STEP 2. Ask the operator
Before inspecting, get the full story of
malfunctions from a witness --- the operator.
How the machine is used and when it is
serviced?
When the trouble was noticed and what
work the machine was doing at that time?
What is the phenomenon of the trouble?
Was the trouble getting worse, or did it
come out suddenly for the first time?
Did the machine have any troubles
previously? If so, which parts were repaired
before.
STEP 3. Inspect the machine
Before starting troubleshooting, check the
machine for the daily maintenance points as
shown in the operator's manual.
And also check the electrical system including
batteries, as the troubles in the electrical system
such as low battery voltage, loose connections
and blown out fuses will result in malfunction of
the controllers causing total operational failures
of the machine.
2. DIAGNOSING PROCEDURE
To carry out troubleshooting efficiently, the following steps must be observed.
1)
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4)
ON THE
INSPECTION
13031SH02
13031SH03
6-2(3) 140-7