Introduction; Dcs Troubleshooting And Repair; Dcs Testing After Repair - Motorola 880 Service Manual

Gsm/dcs dualband
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Introduction

Assembly
replacement
shooting and repair of the phone is limited
to those components listed in the Replace-
ment Parts List. See "Replacement Parts" on
page 59.
It is recommended that known good
replacement parts and assemblies be avail-
able to be used for troubleshooting by
substitution, and for replacement of parts/
assemblies found to be defective.

DCS Troubleshooting and Repair

The troubleshooting information in Table 6,
Table 7, and Table 8 shows some typical
malfunction symptoms and the corre-
sponding verification and repair proce-
dures. Additionally, the "Troubleshooting
Supplements" are offered to assist in correc-
tive action of more detailed symptoms.
Refer to the disassembly instructions located
in "Disassembly" on page 29 for instructions
on removing and replacing parts/assem-
blies from the personal telephone.
If the Logic/RF assembly is replaced a
personality transfer will be necessary. See
"Personality Transfer" on page 25.
NOTE
Defective Logic/RF assemblies must be
replaced with pre-tested, pre-phased
assemblies.
12/9/97
level
trouble-
68P09403A50

DCS Testing After Repair

After any repair work has been carried out,
the unit should be thoroughly tested to
ensure that its operates correctly. This is
especially
important
assembly is replaced.
For general repairs which do not include
replacing the Logic/RF assembly, simply
placing a call and checking signal strength,
and transmit and receive audio quality is
normally sufficient.
When the Logic/RF assembly is replaced,
the unit must have a comprehensive test on
a
DCS
compatible
analyzer. See "Testing" on page 15 for
further details. Placing a call on air is
usually carried out at this stage to complete
the testing procedure.
Troubleshooting
if
the
Logic/RF
communications
53

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