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No continuity
No continuity
Apply red needle
of the circuit tester
Apply black needle of the circuit tester
1
1
2
2
3
3
a
b
b
4
4
Orange
a
Orange
Orange/Green
Orange/Green
(6) A.V.R (AUTOMATIC VOLTAGE REGULATOR)
1) Features
This AVR operates to control the field current in
order to maintain the output voltage for the AC
current, which generated by the magnetic flux by
the field coil.
2) A.V.R. trouble may be identified by simply looking
at the A.V.R., or by the inter-lead resistance with
a tester, or actually mounting it in the generator
and operating it.
(a) A.V.R. TROUBLE IDENTIFICATION by APPEARANCE
If an A.V.R. electronic part is burnt dark, or the surface epoxy resin melted, it often indicates A.V.R.
trouble.
(b) IDENTIFYING A.V.R. TROUBLE by CHECKING INTER-LEAD RESISTANCE
Check the inter-lead resistance of the A.V.R. with a tester, referring to the following table.
If the tester readings very greatly from the values specified in the table, the A.V.R. is faulty.
(c) IDENTIFYING A.V.R. TROUBLE by MOUNTING and OPERATING in THE GENERATOR
SCR or transistor damage cannot be detected by simply looking at the A.V.R. or checking the lead
resistance. Check it by mounting the suspectedly faulty A.V.R. in a normal generator, or mount a normal
A.V.R. in a generator which fails to generate voltage.
4P Connector
1
2
3
a
b
4