n
Measure the resistance of field coil with a
circuit tester. (See Fig. 11-3.)
n
NORMAL RESISTANCE
(RXlQ+-10%)
RESISTANCE
8.5 R
IRemedy
H If the resistance is not normal, replace rotor
with new one.
I
Fig. 1 l-3
H Unsolder and take out the diodes and the resistors.
w Measure the resistance of 2 pieces of diode.
CATHODE MARK
P0LARll-Y OF
CIRCUIT TESTER
[Continuity exists]
n
Measure the resistance of each resistor.
NORMAL RESISTANCE
n
Check the magnetic force of magnets molded in the rotor.
[Remedy1
1. If the magnetic force is weak, replace the rotor with a new one.
2. If the diode or the resistor is faulty, replace them with new one. When all these parts are good,
assemble them and then solder.
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