Altec Lansing ADA890 User Manual page 6

BASS. The BASS button has two modes of operation: BASS level control or CENTER level control.
A)BASS LEVEL CONTROL. The bass level control is accessible in all modes of operation. If it is desired to increase/decrease BASS response, press this button.
The LCD display will show BASS. Also, the volume level indicators will show the last setting of the control. Rotate the master volume control clockwise to increase
bass and counterclockwise to decrease bass. As bass response is increased/decreased the volume level indicator bars will show in ascending or descending order the
bass level change.
B)CENTER LEVEL CONTROL. This function is only operational in Pro Logic and Dolby Digital mode. Depress and hold the BASS button until the function
indicator shows CENTER. Rotate the master volume control clockwise to increase center level and counterclockwise to decrease center level. The volume level
indicator bars will show in ascending or descending order the center level change.
TREBLE. The TREBLE button allows 2 modes of operation, TREBLE level control or SURROUND level control.
C)TREBLE LEVEL CONTROL. The treble level control is accessible in all modes of operation. If it is desired to increase/decrease TREBLE response, press this
button. The LCD display will show TREBLE. Also, the volume level indicator will show the last setting of the control. Rotate the master volume control clockwise
to increase treble and counterclockwise to decrease treble. As treble level is increased/decreased the volume indicator bars will show in ascending or descending order
the treble level change.
D)SURROUND LEVEL CONTROL. This function is operational in Pro Logic, Dolby Digital, Quad, and Stereo X2 modes. Depress and hold the TREBLE button
until the LCD display shows SURROUND. Rotate the master volume control clockwise to increase surround level and counterclockwise to decrease surround level.
The volume indicator bars will show in ascending or descending order the center level change.
NOISE TEST. To check the overall sound system a noise test is provided. To enter the NOISE mode, the system must be in the DOLBY DIGITAL or PRO LOGIC
MODE. Hold the MODE button down until the LCD display shows NOISE. (While the mode button is held down in the DOLBY DIGITAL mode, the LCD will
temporarily show STEREO, however, the mode is still DOLBY DIGITAL. In the PRO LOGIC mode while holding down the MODE button the LCD display will
temporarily show QUAD, however, the mode is still PRO LOGIC.)
The noise will sequence through each channel in approximately 2 second steps. The noise will be heard through each speaker if the system is operating properly. The
noise will continue to sequence through each channel until interrupted by pressing the MODE button. The purpose of the test is to make sure each speaker is working.
The noise generated is composed of a wide spectrum of audio frequencies which make it suitable to test all the speakers in the system.
MASTER VOLUME CONTROL. The MASTER VOLUME CONTROL provides many functions. It operates as a master volume control for the overall system and
can also be used to individually adjust the volume levels of BASS, CENTER, TREBLE, and SURROUND. If any one of the functions is selected and not adjusted
within a few seconds, the control reverts back to becoming a master volume control.
FLAT RESPONSE SETTING. To set the BASS and TREBLE controls to a flat response (default) and the CENTER and SURROUND controls to mid volume level
positions, both the BASS and TREBLE buttons must be depressed at the same time. The buttons must be kept depressed until the LCD display shows DOLBY
DIGITAL. The amplifier response is now flat (linear). Volume level indicator bars will show in the middle of the display indicating the flat response of the amplifier.
If it is desired to increase/decrease BASS or TREBLE response, press either of these button respectively. Rotate the master volume control clockwise to increase levels
and counterclockwise to decrease levels from the flat setting.
To access CENTER volume level settings the unit may be in Dolby Digital or Pro Logic mode. To access SURROUND volume level settings the unit may be in the
Quad, StereoX2, Dolby Digital, or Pro Logic mode. Press the TREBLE button until the LCD display shows SURROUND or hold the BASS control until the LCD
display shows CENTER. Adjust the master volume control clockwise to increase volume level and counterclockwise to decreased volume level of the SURROUND
or CENTER channels.
HEADPHONE USE. (See Figure 8) Headphone output is active in all modes. If it is desired to listen privately, a
Figure 8
headphone jack is available in the side of the left satellite. A headphone (not supplied) with a 3.5 mm(1/8") stereo plug.
When the headphone is plugged into the headphone jack, the speakers are muted. The headphone output is separately
amplified and will have all the channels mixed. The master volume control is used to adjust the headphone volume.
Remove the headphone plug to restore speaker amplification.
AC LEVEL POWER INDICATOR. (Please Note: LED is located on front of Subwoofer) Under normal operating line
voltages, the LED will glow lime. The LED will glow red when the line voltage exceeds normal operation. In the red
condition, protective circuits may turn off the audio amplifiers. The amplifiers will operate again when the power indicator
glows lime. If the indicator glows red continuously, inform your power company. They may need to reduce the line voltage
to normal levels.
DIAGNOSTIC SWITCH. (See Figure 2 for switch location) In the event it is necessary to troubleshoot the ADA890 to
make sure all speakers are operating properly, press this switch. All speakers will revert to a flat (default) response regardless
of previous settings. A test tone**** will sequence to each speaker separately. Notice if the speakers are working or sound is
distorted or speaker levels are incorrect. This information will help a service technician. At the end of the test the mode will
revert to Dolby Digital regardless of the mode setting prior to performing the test.
The test can be operated as many times as required to assure the system is operating properly.
****To test the subwoofer, the frequency of the tone will change to one suitable for testing the subwoofer.
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