Bell System 2-72 Multi Way Installation And Operating Manual page 30

tabellet Apartment Station 2-72 Way System
Video Problems
Blank picture when: -
Calling apartment station or
touching view
No picture when calling apartment
station
No picture when touching view
Touching view locks up system
Repeated touching of view does not
select cameras in sequence as
expected.
Unstable picture
Unstable picture possibly with areas
looking like a photographic negative.
Entrance cannot be seen at night
Speech Problems
Loud tone at the entrance
speaker. (Acoustic
feedback)
No speech from apartment
station to entrance
No speech from entrance
to apartment station
PD-307 Issue 2

Broken or missing Video + or Video -
connection.

Cameras incorrectly configured refer to SW2-6
settings on page 21

Call is from an audio only panel.

Check auto display switch is on. See page 26

CCTV not available on multi-way systems.

Ensure BFD8/72 SW2-8 is OFF

Check SW2-6 at all entrances is set for correct
number of cameras at that entrance

Check settings for SW3 if SW2-7 is enabled

See section 'Global View' on page 22

Power supply voltage low.

Terminator switch not set on last apartment
station.

Too many terminator switches set on.

Video gain jumper set to high on a short run.

Very bright area in background upsetting
camera.
 Video + and Video - reversed, or M and S
reversed.

Power not connected to camera IR night
illumination. Connect 1 to + on camera.
 Broken Audio 1 or Audio 2 connection.
 Intermittent or broken Data A or Data B connection.
 Apartment station has reset; see the power faults table.
 Missing or Broken Spkr + or Spkr - connection.
 Missing or Broken PM + or PM - connection.
Installation and Operating Manual Page 30 of 48