Owner`s manual

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. Use the following steps to set these adjustments.
1. Open the front of the telephone entry system and locate the speaker volume, microphone
volume and feedback adjustments (see page 47).
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 tenant is still on the line, ask them to remain silent. Move the feedback tone
generator jumper from the OFF to the ON pins. A tone will now be heard in the speaker.
Rotate the feedback adjustment until the tone coming from the speaker is minimum.
Move the feedback jumper back to the OFF pins to cancel the tone.
6. Speaker volume and microphone volume (gain) may now be adjusted to desired levels.
If both are set too loud, feedback may result. For louder speaker volume, the
microphone volume (gain) may need to be decreased. For a more sensitive microphone
(gain increased), 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, close the face plate of the entry system and place some
test calls. If feedback occurs, microphone and/or speaker volume will need to be
reduced.
4.2 Display Contrast (1834, 1835, 1837)
1. Let the system run 10-minutes before making any display contrast adjustments.
2. Open the front of the telephone entry system and locate the contrast adjustment. On the
1834 and 1835 systems, this adjustment will be on the display board or on the display
interface board, depending on which style (surface, flush or wall) you have. On the 1837
system, this adjustment is located on the back of the display.
3. Turn the contrast potentiometer clockwise and then counter clockwise until the display is
satisfactory.
Page 52 1835-065-T-7-12