Boss Audio Systems 637UA User Manual

 Page 9

 Page 2

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.
    

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.

There is no power.

The CDs cannot 
be loaded. 

The fuse has blown.

Presence of CD disc inside the player

Inserting the disc in upside down

The surface of CD is extremely dirty
or it is damaged.

Temperature inside the car is too
high.

The volume control is set too low.

There is no sound.

  The operation keys
  do not work

The sound of the 
CD player skips

   The antenna cable is not connected.    Insert the antenna cable firmly into the

   antenna socket of the device.

No radio reception.

  1.The built-in microcomputer is not
     operating properly due to noise
  2.Front panel is not properly fix into
     its place

  1. Switch the device off and on again. Or press
      the RESET button to resume the program. 
   
  2. Reinstall the front panel  

The device has not been correctly
connected. 

The installation angle is more than
30 degrees

Wait until the road becomes smoother before
playing the CD.

Adjust the installation angle to less than 30
degrees

Turn up the volume properly.

Check the power and ground connection
according to the wiring diagram.

Cool off until the ambient temperature returns
to normal

Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged. 

Insert the compact disc with the label facing
upward

Remove the disc in the player then put a new
upward

Replace another fuse according to the wiring
diagram.

The car ignition is switched off.

If the power supply is properly connected to
the car accessory, switch the ignition key to
   ON  or  " ACC 

" 

 " 

 " .

The device does
not work correctly
(EJECT, LOAD, 
 PLAY)

In automatic search
mode the radio does
not stop at a trans-
mitting station.

Tune in to a radio station manually.

The transmission signals are too
weak.

The CDs are loaded
only halfway into
the CD tray.

The transport screws have not been
removed.

Remove the transport screws before using.

The surface of the road is uneven.

The surface of CD is extremely dirty
or it is damaged.

Clean the CD or try another CD, if this works
correctly, the first CD is properly damaged.