BF Apartment Station 1 Way System
PD-167 Issue 1B
Installation and Operating Manual
Page 22 of 44
Door Speech Volume Adjustment
Introduction
The speech level heard by a caller at the door is adjustable by use of three pushbuttons on
the BFD1 door controller. This is useful if the door is on a noisy street, or alternatively in a
quiet location. Speech gain in the other direction is fixed.
Method
To perform volume adjustment, first borrow the jumper from Prog-6 and place it on the two
pin header ZLK. The Yellow Speech LED should light.
WARNING. A power fail during a Save may require the unit to be returned to Bell System
for reprogramming. Do not perform volume adjustment without the jumper in place.
8 presses of Vol+ doubles the volume level and 8 presses of Vol– halves it. Pressing
Save stores the new value. Increasing the volume too far will make speech less stable
and there will be a tendency for feedback – intermittent screeching and howling. If this
happens press Vol– four times and Save and test again.
The new level is tested by ringing one or more apartment stations and talking to them.
Finally return the jumper to its original location on Prog-6.
2
2
M
M
1
1
LS
S
S
B
B
LL
A
A
LC
–
–
–
–
–
–
–
–
–
–
–
–
+
+
+
Video
Camera 1
S
pe
ec
h
U
ni
t
P
M
12
V
S
P
K
R
Camera 2
Video
Exit
Butns
Call
28V
12V
12V
Audio
Audio
Door
Data
Data
Lock
Commn
LR
B1 B2
+
+
+
+
+
+
+
+
+
+
–
–
–
bell
BFD1
free
Enhanced Speech
Door Controller
DDA
Power
Input
Output
Status
1
1
Prog-6
ZL Prog
Vol+
Speech
Vol-
Panel
Speaker
Save
Lock
Power
Test
SW1
Off-On
Off-On
Off-On
SW2
SW3
Cam2
Audio
Phone
Power
28V
Video
100
75
High
100
75
High
Cam1
Cam2
4 3 2 1 0
Video
Gain
Panel
Tone
Volume
2
8V
G
e
n
e
ra
to
r
bell
System
© 2010
Label BFD1
Version No
Build No
ZLK
