Philips 50 T Series, Service Manual

Page: 27 / 105

Chapter 4 - Troubleshooting
4
Troubleshooting
Solving General Problems
Troubleshooting is based on the interpretation of the Receiver LED’s. This
chapter describes common problems and their causes, and provides
troubleshooting flowcharts and guidance for their solution.
Problem Possible Causes Solutions
All the lights on the
receiver stay on when
the receiver is turned
on. Fetal monitor is switched off.
Possible defect in the receiver, interface
cable or fetal monitor.
Switch on fetal monitor.
Carry out the tests described in “Testing the
Receiver” on page 11.
The Telemetry
Indicator Lamp on the
fetal monitor does not
light when the monitor
and the receiver are
switched on. Incorrect interface connection between
the monitor and the receiver.
Faulty interface cable.
Follow the instructions in Instructions for Use for
details on how to connect the monitor to the
receiver.
Replace interface cable.
Receiver Power On
Light does not light
when the receiver is
switched on. Power cable not plugged into the power
supply.
Fuses need replacing.
Plug in and switch on.
Replace fuses.
Transmission INOP
light on the receiver is
still lit when the
transmitter is switched
on. Receiver and transmitter do not have
the same channel or serial number.
Batteries in the transmitter are
exhausted.
Check channel number and the serial numbers
are the same on the receiver and the transmitter.
Change the batteries in the transmitter (refer to
the Instructions for Use for details.)
Battery Low Light lit on
receiver. Power in batteries is low. Change batteries.
INOP transmission
lamp is lit after the
patient has moved a
short distance away
form the receiver. Local Antenna:
Antenna not connected correctly.
Remote Antenna System:
Antenna cable not connected correctly
to receiver.
Check antenna is connecting correctly.
Test the antenna system by bringing the
transmitter close to the receiver. If the
transmission is good, then the antenna system is
not functioning properly.