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DOOR STATION ADJUSTMENTS
There are three adjustments on the door station which may require fine tuning after installation.
NOTE:
A flat bladed screw driver with a blade width of between 2mm and 2.4mm
is required for these adjustments.
The use of an incorrect screw driver will result in the pot being damaged.
Door Station Volume
Speaker volume at the door station is adjusted by means of a miniature trim pot (VR1)
located in the center of the circuit board.
Turning this pot will vary the speaker volume.
This adjustment can be made while someone is communicating to the door station
from one of the internal stations or while the chime is activated.
Chime Volume
Chime volume is adjusted by means of a miniature trim pot (VR2) situated at the
bottom of the circuit board as indicated below.
Turning this pot will vary the chime volume throughout the system.
This pot should be adjusted so the chime volume comes through at an acceptable
level at an internal room station with its slide volume control set to around level 4 or 5.
Microphone Gain
The microphone gain pot (VR3) is generally set half way and would rarely require adjustment.
The microphone level can be turned down where the door station causes feedback in a room station
due to close proximity or can be turned up if the communication level at internal
stations is too low.
CHIME
VOLUME
SPEAKER
VOLUME
POS
NEG
COM1
COM2
TC
VLC
SHLD
CH
VR3
VR2
VR1
MICROPHONE
GAIN
U5