Use the "VOLT" trimmer on the back to change the output by +/- 15% (clockwise increases voltage) .
If you can't find the exact diagram, apply this universal connection approach (works for >90% of thyristor AVRs):
Many aftermarket suppliers are surprisingly helpful with documentation: an-5-203 avr wiring diagram pdf
The standard AN-5-203 wiring layout consists of a main multi-pin plug block alongside independent excitation leads. The typical terminal profile is broken down below: Main Plug Connections (Pins 1–4)
Plug the 4-pin connector from the new An-5-203 AVR into the matching wiring harness coming out of the stator. This connection is keyed and will only fit in one direction. Step 4: Connecting the Brushes Use the "VOLT" trimmer on the back to
Do not touch the AVR while the generator is running, as internal components carry high voltage. Troubleshooting Common Issues
If you need help identifying which terminals correspond to the vs sensing on a specific model, or need tips on how to "flash" the field to build up residual voltage, let me know! This connection is keyed and will only fit in one direction
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Leave a comment with your generator make/model and the terminal labels from your PDF diagram.
Connected to the exciter stator field coils.