MB QUART GMR7V1 User Manual

29
Diagnostics & Troubleshooting
Problem Cause Solution
No power
(Unit does not turn
on)
1. Incorrect wiring
2. Fuse is blown
3. Wiring harness is not
connected
1. Re-check wiring
2. Replace fuse
3. Re-check wiring
harness connection
No sound
(Externalampliers)
1. Ampliersnot
connected to power
2. Ampliersnotturning
on
1. Checkamplierpower/
ground connections
2. Connect blue remote
turn on wire
No AM/FM
reception
1. Antenna cable is not
connected
2. The signals are too
weak
1. Insert the antenna
cable securely
2. Select a station
manually
AUX Input or RCA
output distortion
1. Volume may be up
too much on external
device
1. Lower volume on
external device until
distortion goes away
Externalampliers
have low signal
input.
Gain too high (hiss)
1. Zone control is turned
down too far
1. Increase zone control
level to provide
more signal level to
ampliers
Bluetooth can't/
won't connect
1. Mobile device has BT
switched off
2. Mobile device is not
discoverable
1. Enable the Bluetooth
function
2. Make the device
discoverable
USB thumb drive
not reading
1. MusicleisnotMP3,
WAV or WMA format
1. Convertmusicle
format into MP3, WAV
or WMA format
Camera does not
display in reverse,
only in camera
source menu
1. Purple/white reverse
trigger wire not
powered
1. Power the purple/white
wire on the back of the
unit with +12v trigger

MB QUART GMR7V1 Specifications

General

Brand	MB QUART
Model	GMR7V1
Category	Touchscreen
Language	English