User's Manual

Operator’s Manual ZM-520PA/521PA/530PA/531PA 75
Troubleshooting
If a problem occurs, use the following to find and fix it. If the problem still remains after checking
the following, contact your Nihon Kohden representative.
Transmitter
Problem Cause Countermeasure
Nothing is displayed
on the LCD after
turning the power on.
Batteries are not installed
correctly. The battery polarity is
wrong.
Install the batteries correctly.
Batteries are completely
discharged.
Replace the batteries with new ones.
LCD is difficult to
see (too dark or too
light).
LCD brightness is not
appropriate.
Change the LCD brightness on the
SYSTEM SETUP screen. Refer to
the “Changing SYSTEM SETUP
Settings” section.
Nothing is displayed
on the receiving
monitor after turning
the transmitter power
on.
The channel of the transmitter
and monitor does not match.
Set the correct channel on the
monitor.
The software version of the
multiple patient receiver or
central monitor is old.
Upgrade the multiple patient receiver
or central monitor software to receive
signal from the transmitter. Contact
your Nihon Kohden representative.
Protocol on the transmitter and
monitor does not match.
Set the same protocol on the
transmitter and monitor.
Protocol on the transmitter is
set to 51 but the monitor cannot
receive protocol 51.
Set the protocol on the transmitter
to 41. Refer to the “System Setup
Setting List” section.

૞ᚑ㒙ጊޓᖘᏆ ᛚ⹺⌀ᨩޓ⌬