Boss Audio Systems 637UA manual Location and Function of Controls, Trouble Shooting

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

LOCATION AND FUNCTION OF CONTROLS

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.

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