Service manual

3. Electrical Parts
3-6
3.2 Electrical Parts of Generator
3.2.1 Rotary rectifier
1.Silicon rectifier
2.Varistor
3.Conductive plate
4.Insulating plate
5.Lead wire (alternator)
6.Lead wire (Exciter)
cathode ● ● anode
How to check whether silicon rectifier (diode element) functions correctly or not
Check the silicon rectifier (diode element) according to the resistance range of circuit meter.
When the anode side of normal functioning silicon rectifier is connected to the plus of the circuit
meter and cathode side connected to the minus side ( in reverse direction), the circuit meter indicates
more than 100Ω and vice versa connected, the meter indicates 10Ω.
Note: The rotary rectifier is equipped with 3 sets of silicon rectifiers of forward direct polarity at
the K side and 3 of reverse direction polarity at the J side. So take care not to make a
mistake in the polarities.
A
S-016
C A
SG06013