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Technician safety guidelines for product service and repair operations.
Steps for testing electrical safety before returning the product to the user.
Cautionary advice regarding the danger of explosion from incorrect battery replacement.
Step-by-step guide for replacing the horn rotor belt.
Procedure for safely replacing the horn driver unit.
Instructions for removing the motor drive PWB and the PWH-74C board.
Procedures for checking the DC power supply and remote power ON function.
Steps for resetting rotation speeds to factory settings.
Adjusting slow/fast speeds and rise/fall times for horn and drum rotors.
Testing power amplifier output and tone control functions.
Measuring noise levels for woofer and horn speaker outputs.
Detailed wiring connections for the PWH-74C power amplifier board.
Technician safety guidelines for product service and repair operations.
Steps for testing electrical safety before returning the product to the user.
Cautionary advice regarding the danger of explosion from incorrect battery replacement.
Step-by-step guide for replacing the horn rotor belt.
Procedure for safely replacing the horn driver unit.
Instructions for removing the motor drive PWB and the PWH-74C board.
Procedures for checking the DC power supply and remote power ON function.
Steps for resetting rotation speeds to factory settings.
Adjusting slow/fast speeds and rise/fall times for horn and drum rotors.
Testing power amplifier output and tone control functions.
Measuring noise levels for woofer and horn speaker outputs.
Detailed wiring connections for the PWH-74C power amplifier board.
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