(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

b

1

2

4

3

4P Connector

(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.

 

 

 

 

Apply black

 

needle of the circuit tester

 

 

 

 

a Orange

b Orange/Green

1

2

3

4

 

 

a Orange

 

 

 

 

 

 

 

b Orange/Green

 

 

 

No continuity

 

Apply red

needle

1

 

 

 

 

 

 

 

 

 

of the circuit tester

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

No continuity

 

 

 

 

 

4

 

 

 

 

 

(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.

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Subaru R1100 service manual V.R Automatic Voltage Regulator

R1100 specifications

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