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Item Check Point Remedy/Remarks
Power cable Check for loosened or corroded
connection at power terminals.
Clean and tighten.
Battery Check that the battery is fully charged. If discharged, charge.
Feeder (coax
cable, control
cable)
Check for physical damage. Replace if damaged.
PCB connection Check that jumper cables between boards
are firmly connected.
Reconnect loosened connections
of jumper cables.
Microphone Check that jumper cables between boards
are firmly connected.
Fasten if loosened.