Controlled Products Systems Group 1834-080 - Manual (Page 52)

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 while rubbing your finger
over the microphone hole on the face plate. 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.
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, 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 Click Sensitivity – For Use with Rotary Dial Phone(s) Only
1. Open the front of the telephone entry system and locate the click sensitivity adjustment.
2. If rotary dial phones are not used, set the click sensitivity to full counter-clockwise to
disable this feature. If rotary dial phones are in use, proceed to step 3.
3. Place a phone call from the telephone entry system to a resident with a rotary dial type
phone. After they answer, ask the resident to dial 9 while you adjust the click sensitivity
potentiometer (the resident may have to dial 9 several times for you to obtain the correct
adjustment). When the door or gate opens, this is the correct adjustment for the click
sensitivity.
4. NOTE: Adjusting the click sensitivity too high (potentiometer fully clockwise) could cause
the system to respond to loud noises while it is in use. If this happens, rotate the click
sensitivity potentiometer counter clockwise 1/8 turn and re-test the system. You may
have to perform this step several times to find the correct adjustment.
4.3 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-R-10-11