Troubleshooting - Boss MC900B User Manual

Bluetooth 4-channel all-terrain amplifier system
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Troubleshooting

If you have problems using this product, check the following points before you request service. If you still have
a problem, contact our technical support.
Problem
No power/no button
backlighting
No sound
Bluetooth not connected
Poor audio quality from
Bluetooth connection.
USB not played
Check that the power cables (battery/ignition/ground) are properly connected
(see the section "Wiring").
Check that the function controller is connected to the amplifier through the
"REMOTE" wires (see the section "Wiring").
Check that two orange wires ("ILLUMINATION") from the function controller
and the amplifier are connected (see the section "Wiring").
Check that the vehicle ignition power (ACC) is switched on.
The fuse is blown. Replace with a new fuse with the same type and rating.
Check that playback is not paused, or turn up the volume.
Incorrect source input. Press
backlights for Bluetooth mode, red backlights for AUX input mode.
Check that the connected speakers are not faulty.
Check that Bluetooth on your mobile device is enabled.
Make sure your mobile device is located in Bluetooth range.
This unit is connected with another Bluetooth device. Disconnect the current
Bluetooth connection.
Move your mobile device closer to the unit, or remove obstacles or sources of
interference that are affecting Bluetooth reception.
The unit's USB port is used for mobile phone charging, not for media play.
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Solution
/
SRC to select the correct source, blue

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