Troubleshooting; Location And Function Of Controls - Boss Audio Systems MR637U User Manual

Marinized mp3 compatible in-dash cd am/fm receiver with front panel usb port and aux input
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TROUBLE SHOOTING
Before using the check list please make all the connections first.
If you still have questions after going through the checklist, please consult
your local customer service representative.
Common Symptoms
Cause
The car ignition is switched off.
There is no power.
The fuse has blown.
The CDs cannot
Presence of CD disc inside the player
be loaded.
The CDs are loaded
The transport screws have not been
only halfway into
removed.
the CD tray.
Inserting the disc in upside down
The device does
The surface of CD is extremely dirty
not work correctly
or it is damaged.
(EJECT, LOAD,
PLAY)
Temperature inside the car is too
high.
The volume control is set too low.
There is no sound.
The device has not been correctly
connected.
The operation keys
1.The built-in microcomputer is not
do not work
operating properly due to noise
2.Front panel is not properly fix into
its place
The installation angle is more than
30 degrees
The surface of the road is uneven.
The sound of the
CD player skips
The surface of CD is extremely dirty
or it is damaged.
No radio reception.
The antenna cable is not connected. Insert the antenna cable firmly into the
In automatic search
The transmission signals are too
mode the radio does
weak.
not stop at a trans-
mitting station.
Solution
If the power supply is properly connected to
the car accessory, switch the ignition key to
"
ON
"
or " ACC
" .
Replace another fuse according to the wiring
diagram.
Remove the disc in the player then put a new
upward
Remove the transport screws before using.
Insert the compact disc with the label facing
upward
Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged.
Cool off until the ambient temperature returns
to normal
Turn up the volume properly.
Check the power and ground connection
according to the wiring diagram.
1. Switch the device off and on again. Or press
the RESET button to resume the program.
2. Reinstall the front panel
Adjust the installation angle to less than 30
degrees
Wait until the road becomes smoother before
playing the CD.
Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged.
antenna socket of the device.
Tune in to a radio station manually.

LOCATION AND FUNCTION OF CONTROLS

18
4
1
20
13
2
20
19
1 & 2.SEL(MENU) BUTTON AND VOL KNOB
a) Press the SEL button briefly, it is activated as selecting each mode of E. VOL.
-> VOLUME ->BASS ->TREBLE -> BALANCE -> FADER ->
When selecting a desired audio mode, rotate the VOL knob to adjust the
audio effect.
In each mode, the waiting time is about 5 seconds, and the time waiting time
is over, it returns to the last display mode of tuner or CDP mode.
The control mode of E.VOL is operated with following numeric display.
- VOL: (MIN)00, 01,......46, 47(MAX).
- BASS/TRE: -07, -06,...,00,...+06,+07
- BAL: 0LR9, 1LR9, ..., 9LR9,..., 9LR1, 9LR0
- FAD: 0FR9,1FR9, ..., 9FR9,..., 9FR1, 9FR0
b) When pressed and hold for more than 2 seconds, it is activated as cyclical
mode of following functions for user s selection.
->BEEP (ON/OFF) -> USER SET(FLAT/CLASSIC/ROCK/POP)
->VOL(LAST/DEFA) ->CLK(ON/OFF)->CLK(12/24)mode.
When selecting a desired audio mode, rotate the VOL knob to adjust the
audio effect.
5
8
11
ST
FL A SH
LOUD
MUTE
MP3/CDR/RW PLAYBACK
10
3
6
7 15
9
17
'
14
12
16

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