1835-065-D-5-17
51
This adjustment is only on the 1835 wall mounts and all the 1837 models. This is adjusted at the factory and
should NOT be adjusted in the field.
4.3 Backlite Cutoff
321
BACKLITE
CUTOFF
4.1 Speaker Volume, Microphone and Feedback
Speaker volume, microphone volume and feedback all interact with each other to affect the audio performance of the system.
1.
Locate the speaker volume, microphone volume and feedback adjustments on circuit board (see previous page).
2. Set the speaker volume about 1/3 from full counter-clockwise.
3. Set the microphone volume to 1/2.
4. Place a phone call from the telephone entry system to a resident. If feedback occurs, turn the speaker volume
counter-clockwise until it ceases.
5. While the resident is still on the line, ask them to remain silent. Move the feedback tone ON/OFF jumper to to
the ON position. A tone will now be heard in the speaker. Rotate the feedback adjustment throughout its range
while listening to the sound coming from the speaker. When the sound is minimum, this is the correct setting.
Move the feedback tone ON/OFF jumper back to to the OFF position.
6. Speaker volume and microphone volume may now be adjusted to desired levels. If both are set too loud,
feedback may result. For louder speaker volume, the microphone volume may need to be decreased. For louder
microphone volume, the speaker volume may need to be decreased.
7. Normal setting for both speaker volume and microphone volume is about 1/2.
8. After setting these adjustments, place some test calls. If feedback occurs, microphone and/or speaker volume
will need to be reduced.
MIC
VOL
321
FEED
BACK
321
321
SPK
VOL
LCD display is adjusted at the factory and should NOT need to be re-adjusted. If it does, Let the system run for at
least 10-minutes before making any display contrast adjustments.
4.2 LCD Display Contrast - 1835 and 1837
1. Locate the contrast adjustment on your chosen model (see previous page).
2.
Turn the contrast potentiometer clockwise to lighten, counter-clockwise to darken until the display is satisfactory.
CONTRAST
or
31
CONTRAST
31
TONE ON
TONE OFF
4.4 Master Code Switch
The master code switch MUST be kept in the OFF position for normal operation. Turn the master code
switch ON only when programming the system’s master code. See section 3.2.1 to program the system’s
master code. If the master code switch is turned ON and a new master code is NOT entered, the system will
sound a long tone after approximately 30 seconds. This tone will continue every 30 seconds until a new
master code is entered, or until the switch is turned off.
ON
OFF
MASTER
CODE
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