Trouble Shooting Guide - Videx VX2200 Technical Manual

VIDEX ELECTRONICS S.p.A.
ANOMALY FOUND
The system is supplied but the VX2202/.. or
VX2203/.. front panel does not turn on.
The VX2202/.. / VX2203/.. front panel display
shows "ERROR" (VX2202/..only) and the unit
makes acoustic intermittent signals at intervals of
about 2 secs.
The system, at the moment of the call, is not able
to let the extension ring, the front panel makes
acoustic signals of line engaged and the display
(VX2202/..only) shows "Engaged" or "Error".
The outdoor station makes the call correctly, but
when the user answers, the communication is cut
off.
During the conversation, when the door is opened,
the communication is cut off.
The calls goes through, but the conversation is
one-way only.
The audio level of conversation is too low.
The audio level is at its limit or oscillates ( Larsen
effect).
The door opening is not carried out.
The local floor call does not work.
The internal video stations do not turn on.
The internal video stations turn on, but the image
does not appear.
The internal video stations turns on but the quality
of the image is bad or reflected.
126
VX2200 "2 WIRE" Bus Digital System

TROUBLE SHOOTING GUIDE

POSSIBLE CAUSE
1. Interruption or short circuit of the 13Vdc
output on Art.521B to the outdoor station;
2. Art.521B is defective or fuse blown.
1. Probable short circuit on the BUS "─"and
"L" line;
2. Inversion of polarity on the BUS connection
of a phone, videophone or accessory con-
nected;
3. VX2202/.. or VX2203/.. programmed as
"Slave" when it should be as "Master".
1. The phone or videophone called is not cor-
rectly connected;
2. The wire section (BUS) is to small;
3. The address programmed on the dip-switch
(of the phone, videophone or accessory)
does not correspond to that call;
4. The concierge (if present in the system) has
been left at programming mode.
The wire section is to small.
The wire section is to small.
The supplying voltage on the outdoor station is
too low (under 10.5V).
The levels of the conversation volumes in both
directions are not appropriately adjusted.
The "Balance" trimmer (outdoor station) is not
appropriately set and/or the conversation volumes
are programmed at a high level.
1. Lock defective;
2. Connection wrong or interrupted;
3. Wire section to small;
4. Supplying transformer 12Vac defective.
1. Call push button defective;
2. Connection wrong or interrupted.
1. Art.893N power supply defective or in pro-
tection;
2. Art.893N is not operated by the outdoor sta-
tion during the call;
3. Connection wrong or interrupted.
1. Art.830NC video camera not supplied or
defective;
2. Connection of the V1-V2 signals interrupted
or wrong.
1. Signal V1 or V2 not connected or in short
circuit;
2. V1 & V2 signals inverted;
3. Closing resistances are missing at the end of
the BUS video.
POSSIBLE SOLUTION
1. Check the GND and +13V connections on
Art.521B and on VX2202/../ VX2203/..,
then check the protection fuse on the output
of art.521B and change it if necessary;
2. Check Art.521B power supply and in case
change it or take the tension off for at least
120sec.
1. Check the BUS connections.
2. Check the polarity of the device connection .
3. Configure the device as "Master"
1. Check the right connection of the BUS line;
2. Increase the wires section or double them
with others available;
3. Check that the address associated to the call
corresponds to that programmed on the dip-
switch of the phone (videophone or accesso-
ry);
4. Remove VX2210 from programming mode.
Increase the wires section or double them with
others available.
Increase the wires section or double them with
others available.
Increase the supply wires section (GND e 13V) or
double them with others available.
Adjust on the outdoor station trimmers for micro-
phone and loudspeaker so as to have the best hear-
ing level without oscillations (Larsen effect)
Adjust on the outdoor station the "balance" trim-
mer until the problem is solved and/or lower the
volumes of the microphone and loudspeaker.
1. Change the lock;
2. Check connection continuity;
3. Increase wires section;
4. Check power supply 12Vca;
1. Check defect;
2. Check connection.
1. Check the unit and in case change it or take
the supply off for at least 60secs;
2. "-C" terminal of art.893N not correctly con-
nected to the "SL" terminal of the outdoor
station;
3. Check the continuity of the connection be-
tween the monitor supplying wires and the
videophones interested.
1. Check and/or change art 830NC;
2. Check connection continuity.
1. Check the continuity of the connection and
the isolation to the ground;
2. Check and in case invert the connections;
3. Check and in case apply the closing re-
sistances on the BUS video.