Johnson AFG Pro 7.2AT, Service Manual

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CHAPTER 3: Troubleshooting
3.3.6 TROUBLESHOOTING - SPEAKER / AUDIO ISSUES
SOLUTION:
a. One of the speaker boards has a bad connection or is faulty.
- Check the connection of the wires going from the speakers to the speaker power board.
- Check the connection of the wires going from the speaker power board to the amp board.
- Check the connection of the wires going from the amp board to the console.
- Replace the speaker or amp boards and wiring.
- Replace the speakers.
- If the speaker board, amp board, wiring, and speakers do not solve the issue,
replace the console.
b. There is a bad connection between the headphones and the console.
- Verify the connection of the music player to the dock or audio adaptor cable.
- Verify the audio adaptor cable connection at the console.
- Replace the headphone jack.
- Replace the audio adaptor cable.
c. There is a bad connection between one of the audio boards and the console.
- Verify the connection of the music player to the dock or audio adaptor cable.
- Verify the audio adaptor cable connection at the console.
- Replace the audio adaptor cable.
- Replace the console.
d. Speakers are not getting a clear signal through the speaker wires.
- Check the speaker wire connections.
- Replace the speaker wiring.
- Replace the speakers.
e. The speaker or speaker wiring is bad.
- Check the speaker wire connections.
- Switch the speaker connections from one speaker to the other to see if sound switches sides.
- If the sound does not switch sides, replace the speaker board.
- If the sound does switch sides, replace the speaker and speaker wires.
f. Grounding issue.
- Try a different set of headphones.
- Check the grounding of the console.