Speaker Volume, Microphone And Feedback - DKS 1802 Installation & Owner's Manual

2.3.1 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).
SPK
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2. Set the speaker volume: Place a phone call from the telephone entry system to a resident. While they are
VOL
talking, adjust the speaker volume potentiometer for adequate sound. To increase the volume rotate the
potentiometer clockwise, to decrease the volume rotate the potentiometer counter clockwise. See Feedback
adjustment below.
3. Set the microphone volume: Place a phone call from the telephone entry system to a resident. Talk to the
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resident in a normal voice while adjusting the microphone volume potentiometer. Ask the resident to let you
MIC VOL
know when the sound in their telephone is adequate. To increase the volume rotate the potentiometer
clockwise, to decrease the volume rotate the potentiometer counter clockwise. See Feedback adjustment
FEEDBACK
below.
4. Set the feedback: Place a phone call from the telephone entry system to a resident. After they answer, ask the
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resident to remain silent.
5. While the resident is still on the line, remove the jumper from the TONE OFF terminals on the circuit board
and place it on the TONE ON terminals. A tone will be heard in the speaker.
6. Rotate the feedback potentiometer clockwise, and then counter clockwise. When the tone from the speaker is
N E N E
T O
minimum, this is the correct adjustment.
T O
F
O N
O F
7. Jumper MUST be moved back to the TONE OFF terminals when complete.
8. High microphone and speaker volume levels may cause feedback. It may be necessary to reduce the speaker
volume if the microphone volume is set too high. Likewise, it may be necessary to reduce the microphone
volume if the speaker volume is set too high.
2.3.2 Click Sensitivity - Use for Rotary-Dial Phones ONLY
1. Locate the click sensitivity adjustment on circuit board (see previous page).
2. If rotary dial phones are NOT used, set the click sensitivity to FULL counter-clockwise to disable this feature.
CLCK
If rotary dial phones are in use, proceed to step 3.
SENSE
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.
2.3.3 LCD Display Contrast
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.
CONTRAST
1. Locate the contrast adjustment (see previous page).
2. Turn the MASTER CODE switch ON. The display will read MST CODE. While the display is lighted, turn the
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contrast potentiometer clockwise and then counter clockwise until the display is satisfactory.
3. MASTER CODE switch MUST be turned OFF when finished.
O N
E R
Note: Approximately 30 seconds after the master code switch is turned ON, the system will signal a long tone.
S T
M A
D E
This is normal and can be ignored. After the master code switch is turned OFF, the display will read MST CODE
C O
F
O F
for approximately 30 seconds.
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