Philips Avalon CTS M2720A, Service Manual

Page: 68 / 110

7 Troubleshooting Common Problems
62
Common Problems
Reasons why the cordless transducers may not work properly are given below, along with suggested
actions to take:
Possible Reasons Action
Base station cannot tune into a free channel. Check the antenna . Is it correctly and securely
attached to the base station?
Scan for RF interference (see “Scanning the Available
Frequency Range” on page 69).
Exclude frequency ranges with RF interference (see
“Excluding Frequencies” on page 70).
Fix the RF frequency used by the system (see “Base
Station with Fixed Frequency” on page 70).
Out of available channels. For example, after
excluding “problem” frequencies, only two
channels are available, but you want to use three
transducers. Check if it is possible to get more free channels. As a
workaround, you could alternate the use of one of the
channels between US and ECG.
The transducer has a serial number of zero (not
a valid number) and error E5 is displayed on the
base station. Assign a valid serial number to the transducer by using
the Service Support Tool with a valid access code (see
Service Support Tool Help ).
Two transducers have the same serial number
and error E5 is displayed on the base station. Change the serial number of one of the transducers by
using the Service Support Tool with a valid access
code (see
Service Support Tool Help ), or replace one of
the transducers with one from another base station.
Two or more transducers use the same
frequency. Reasons:
• There is more than one fixed frequency base
station with the same channel spacing.
• Change the base stations’ base frequency and/or
the channel spacing (see Service Support Tool Help ).
OR
• There are two or more transducers
programmed with the same fixed frequency.
OR
• Assign different fixed frequencies to each
transducer (see Service Support Tool Help ).
General incompatibility: for example, an ISM
band transducer is being used with a WMTS
band receiver. Ensure hardware and software compatibility.
Communication error (always results in an
inoperative transducer). Communication errors cannot be checked using the
Service Tool.
1. Check contacts (see page 67).
2. Reset the system (see page 61).
3. If reset fails, replace the transducer.
4. If problem persists, replace the base station.
Is the transmitter out of range? Determine the effective operating range of the system
in your particular environment, and inform the patient
to stay within this area while monitoring takes place.
See “Range Definition” on page 67.