Chapter 9 Electrical
System
_4._A_Jt_e_rn_a_t_or
____________________________
3,4JH3(B)(C)E
2} To replace the IC regulator, disconnect the soldered
joint the
IC
regulator and pull out the two bolts. Do not
remove these two bolts except when replacing the
IC
regulator.
'
'""'"
~
0
4-8
Inspection and adjustment
(1) Diode
Between
terminals
Tester
wire
+
side
U.V.W.
-
side
Between
terminals
Tester
wire
+
side
U.V.W.
-
side
u
+
side
diode
--C
-
side
diode,
---
;
/
Current
direction
BAT
(
+side
diode)
+
side
-
side
------
Continuity
No
Continuity
-----
E (
+side
diode)
-side -side
------
No
continuity
Continuity
-----
V
w
➔
BAT
U.V.W.:
terminal
from
the
stator
coil
Current flows only
in
one direction
in
the diode as shown
in
Fig.
181.
Accordingly,
when
there
is
continuity
between each terminal (e.g. BAT and
U),
the diode is
in
normal condition (photo). When there is no continuity, the
diode is defective.
When the tester is connected
in
the reverse of above,
there should be no continuity
If
there is, the diode is defec·
tive.
9-26
After repeating the above test, if any diode is found to be
defective, replace the diode assembly. Since there is no
terminal
on
the
auxiliary
diode,
check
the
continuity
between both ends of the diode.
-~·p-.
""'-...:
__,~'
. . /
. .
.·
___.:.,-
. :
·.___;
I_~-
/ '
',
CAUTION:
Do
not use high tensile insulation resistance
such
as meggers, etc. for testing.
The
diode
may
burn out.
(2) Rotor
Inspect the slip ring surface, rotor coil continuity and
insulation.
1)
Inspecting the slip ring surface
Check
if the surface
of
the slip ring is sufficiently
smooth.
ff
the surface is rough, grind the surface with
No.
500·600
sand paper.
11
it is contaminated with
oil, etc., wipe the surface clean with alcohol.
Standard
Wear limit
Slip ring outer dia.
¢31.6mm
s6
30.6mm
2}
Rotor coil continuity test
Check the continuity
in
the slip ring with the tester. If
there is no continuity, there is a wire break. Replace
the rotor coil.
Resistance value
!Gr~\
\J~!~~~~
'--~~~-,
Approx.
3.340
at
20°C
Printed in Japan
HINSHI-H8009
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