Panasonic KX-TD500 System Reference Manual page 1343

8.00 PITS Automatic Test
Provides automatic test for normal operation of
LCD (liquid crystal display), LED (light-emitting
diode), and ringer tone on the PITS telephone.
Operation
To enter into the programming
mode
1. Set the MEMORY switch at
the rear of the PITS to
PROGRAM.
SET• • PROGRAM
MEMORY
• With DPITS, press the
PROGRAM button.
2. Dial "90".
Exits from the programming
mode
3. Reset the MEMORY switch
to SET.
SET• • PROGRAM
MEMORY
• With DPITS, press the
PROGRAM button or
change the handset from
off-hook to on-hook.
Explanation of the message display applies only
to a PITS with the display.
Result
• The following message
appears on the display:
PITS-PGM No.?
• The MEMORY button indicator
lights red.
• Test sequence is as follows:
1) LED Test
2) Ringer Test
3) LCD Test
13-C-31
Comment/Note
• This status is called "Initial
display for PITS station
programming mode".
• If the following message
appears on the display, the
programming data of your
PITS has already been
accessed by another
administration device.
Already Accessed
• Before starting the test, set the
RINGER switch on the right
side of the PITS to LOW or
HIGH.
• To stop the test, press the
END button, and then "Initial
display for PITS station
programming mode" is shown
again on the display.