AT&T MERLIN 1030 Installation Manual page 34

TROUBLESHOOTING TABLE (continued)
Trouble Possible Cause
There is trouble with Control unit
voice terminal lights,
speaker, or ringing.
Faulty voice terminal
Faulty control unit or
cable connection
Inadequate power
supply to the control
unit
32
Do This
1. Slide the T/P switch on the
side of the voice terminal to
the T position.
2. Unplug the malfunctioning
voice terminal, and in its
place, plug in a working voice
terminal. Slide its T/P switch
to the T position.
3. Replug the malfunctioning
voice terminal into its original
jack.
Go to the control unit and
locate the jumper cords
plugged into the intercom
jacks for both the malfunction-
ing and working voice ter-
minals. Unplug both from the
control unit, and replug each
into the other's jack.
See if the trouble occurs on
the working voice terminal.
4.
Unplug some of the ac-
cessories connected to your
system.
If
some (but not all) of the lights
flash continually and/or a tone
sounds at irregular intervals
all lights are off and a tone
sounds continually or irregularly
the same trouble appears on the
working voice terminal
the trouble does not appear on
the working voice terminal
the trouble still occurs
the trouble no longer occurs
the trouble remains
the trouble no longer occurs
Then
the trouble is caused by either the
voice terminal or the cable connec-
tion. Go to step 2.
the trouble is caused by the control
unit, the voice terminal, or the
cable connection. Go to step 2.
the malfunctioning voice terminal
probably is not faulty. The trouble is
in either the control unit or the
cables. Go to step 3.
the malfunctioning voice terminal is
faulty. Contact your equipment
supplier.
the problem may be caused by
your control unit. Go to step 4.
the trouble is caused by one of the
cables running to the malfunction-
ing voice terminal. Go to step 5.
the problem is caused by your con-
trol unit. Call you equipment sup-
plier for assistance.
your system needs an additional
power supply. To determine how
much additional power you need,
refer to the graph and instructions
in "Installing Accessories," page
25. Leave accessories unplugged
until you have the necessary aux-
iliary power supplies.