DoorKing 1819 Information Phone - Manual (Page 19)

1819-065-B-4-07
2.4 Adjustments
2.4.1 Speaker Volume
1. Open the front of the telephone entry system and locate the speaker volume adjustment.
2. Place a phone call from the telephone entry system. While the called person is 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 (2.4.3 step 5).
2.4.2 Microphone Volume
1. Open the front of the telephone entry system and locate the microphone volume
adjustment (Rev H boards and higher only).
2. Place a phone call from the telephone entry system. Talk to the called person in a
normal voice while adjusting the microphone volume potentiometer. Ask the person to let
you 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 (2.4.3 step 5).
2.4.3 Feedback
1. Place a phone call from the telephone entry system. When the call is picked up, ask the
person who answered to remain silent.
2. Open the front of the telephone entry system. Remove the jumper from the TONE OFF
terminals and place it on the TONE ON terminals. A tone will be heard in the speaker.
3. Rotate the feedback potentiometer clockwise, and then counter clockwise. When the
tone from the speaker is minimum, this is the correct adjustment.
4. Move the jumper back to the TONE OFF terminals when complete.
5. 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.
2.4.4 Click Sensitivity (Optional - adjust only if a rotary dial phone is called)
1. Open the front of the telephone entry system and locate the click sensitivity adjustment.
2. Place a phone call from the telephone entry system to a person with a rotary dial type
phone. After they answer, ask the person to dial 9 while you adjust the click sensitivity
potentiometer (the person 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.
3. 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.
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