Motorola 880, Service Manual

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22 68P09403A50 12/9/97
Dual Band 880/890 (DCS/GSM)
Introduction
To test a telephone, to verify whether or not
the unit is functioning correctly, the
following equipment will be required:
• DCS compatible communications
analyser.
• Test adaptor (Part No 0109354C01) and
appropriate cable/connectors.
• Test SIM card (Part No 8102430Z01).
• Charged battery pack.
Equipment Configuration
Initially insert the test SIM card into the slot
at the rear of the personal cellular telephone.
Loosen the screw under the antenna cap at
least one full turn and then remove the
phone’s antenna assembly (as described in
the Disassembly section of this manual).
Attach the antenna adaptor by simply
pushing it into the electrical connector now
exposed at the top of the phone. Slide a
charged battery on to the back of the
personal telephone, so that the telephone
can be powered up. Finally, connect a cable
from the RF cable of the test adaptor to the
RF in/out port of the communications anal-
yser, and power both the analyzer and
personal telephone on. The equipment set
up shown above should now be in place.
Testing Procedure
All information required to perform the
desired tests and measurements, should be
obtained from the communication analy
zer’s user manual.
Ensure that the unit being tested is capable
of both initiating a call to the analyser, and
receiving a call from the analyser. Confirm
that the displayed Temporary Mobile
Subscriber Identity (TMSI), International
Mobile Equipment Identity (IMEI), and
dialled number are correct.
When a call is in progress the following
tests should be carried out on channels 512,
700, and 885. The recorded results must be
within the acceptable stated limits, if the
unit being tested passes all the tests it
should be taken as functioning correctly. If
the unit being tested fails to conform with
any of the expected measurements, it should
be taken as faulty and repaired accordingly.
The following table states the required tests
and tolerances.