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1
Symptoms
Checking
method
u
Remedies
C-l No voltage is displayed
on the voltmeter (1 I
I
Voltemeter
Voltmeter failure
Input AC voltage
to terminals in the
voltmeter side
If the displayed value
is different from the
input value, replace
the voltmeter
I
AVR
AVR failure
Measure resistance
value between the
terminals with a
circuit tester (Measure
with a 4P coupter)
-l--
If the displayed value
is different from the
input voltage, replace
the AVR
Brush
contact surface of
2. Abrasion of the
1. Confirm contact
condition of the
slip ring
2, Measure length of
the brush
1. In case of conta-
mination, clean
the brush.
2. In case the brush
is shorter than the
standard one,
replace it with
a regular one.
Clean or replace
the brush.
l-7
Slip ring
I
J
1. Contamination
of the brush’s
contact surface
2. Abnormal abrasion
of the slip ring
Confirm condition of
the brush’s contact sur-
face
1. If the brush’s contact
surface is contami-
nated, clean it.
2. In case of abnormal
abrasion, replace it.
Cean or replace the slip
rings
Lead line
I
Breakage of welded
section or lead line
Measure continuation
with a circuit tester
111
case
of 00 52, the
lead line is defective.