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1.Check the rotor coil
continuity. Make sure that there is continuity between the
slip rings. Measure the rotor resistance. If it is
excessively small, it indicates a shorted rotor. If there is
no continuity or if it is shorted, replace the rotor
assembly.
Standard value: 3 - 5
Ω
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2.Check for rotor coil
earthing. Make sure that there is no continuity between the
slip ring and the core. Replace the rotor assembly if there
is continuity.
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1.Check the electrical
continuity between the stator coil
terminals.
2.Check the electrical continuity of
the points shown in the table below. Confirm that there is
electrical continuity.
If there is not, replace the
stator.
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Terminal connector
of tester
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Electrical
continuity
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1 - 2
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Presence of electrical
continuity
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1 - 3
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2 - 3
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4 - 5
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4 - 6
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5 - 6
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3.Check the insulation
between the stator coil terminal and the
coil.
4.Check the electrical continuity of the
points shown in the table below. Confirm that there is not
electrical continuity.
If there is, replace the
stator.
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Terminal connector
of tester
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Electrical
continuity
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1 - Core
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Absence of electrical
continuity
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2 - Core
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3 - Core
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4 - Core
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5 - Core
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6 - Core
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5.Check the insulation
between coil terminals of each group.
6.Check the
electrical continuity of the points shown in the table
below. Confirm that there is not electrical
continuity.
If there is, replace the stator.
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Terminal connector
of tester
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Electrical
continuity
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1 - 4
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Absence of electrical
continuity
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1 - 5
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1 - 6
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2 - 4
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2 - 5
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2 - 6
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3 - 4
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3 - 5
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3 - 6
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Use the analogue type tester to
make sure the electrical continuity of each diode meets the
table.
Unless the electrical continuity of each diode
meets the table. replace the rectifier.
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(-)
side
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(+)
side
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Electrical
continuity
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E
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P1, P2, P3, P4, P5,
P6
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Yes
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B
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No
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P1, P2, P3, P4, P5,
P6
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E
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No
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B
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Yes
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1.Measure the length of the
protrusion of the brush. Replace the brush if the protrusion
length is shorter than the limit.
Limit: min. 2
mm
2.Unsolder the lead of the brush. The
brush will come out, becoming ready for removal.
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3.Install a new brush by
pushing it into the holder as shown in the drawing and
soldering the lead.
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