Nihon Kohden Corporation ZM-520PA Benutzerhandbuch

Operator’s Manual  ZM-520PA/521PA/530PA/531PA

 75

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.

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.

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