Panasonic KX-TA616 Installation Manual page 210

6.1 While Installing
PROBLEM
Extension does not
operate.
Improper reset operation.
Noise during external
paging.
Volume distortion from
external music source.
Speed Dialing or One-
Touch Dialing does not
function.
A proprietary telephone
connected to extension
jacks 01 through 08 or
09 through 16 does not
operate, but a single line
telephone operates.
6-2
Troubleshooting
PROBABLE CAUSE
Something is wrong with
the printed circuit board
(Extension Card).
Something is wrong with
the connection between the
system and extension.
A telephone with an A-A1
relay is connected.
Something is wrong with
the extension.
Induced noise on the wire
between the system and the
amplifier.
Excessive input level from
external music source.
Wrong programming.
An extension (H, L) jack 01
through 08 or
09 through 16 may have
been shorted.
POSSIBLE SOLUTION
Exchange the printed circuit board
with another printed circuit board.
Take the extension and plug it into
the same extension port using a
short telephone cord. If the
telephone does not work, the
connection between the system and
the extension must be repaired.
Use a 2 wire cord.
Set the A-A1 relay switch on the
telephone to the "OUT" or "OFF"
position.
Take the extension and plug it into
another extension port that is
working. If the telephone does not
work, replace the phone.
Turn the Power Switch "OFF" and
then "ON".
Use a shielded cable as the
connection wire between the
system and amplifier. A short
shielded cable is recommended.
Decrease the output level of the
external music source by using the
volume control on the music
source.
Enter an outside line access
number (9 or 0, 81 through 86) in
programming.
Turn the Power Switch "OFF".
Fix the shorted part, then turn the
Power Switch "ON".