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Introduction
The service diagrams were carefully prepared
to allow a Motorola certified technician to
easily troubleshoot cellular phone failures.
Our professional staff provided directional
labels, color coded traces, measurement val-
ues and other guidelines to help a technician
troubleshoot a cellular phone with speed and
accuracy.
We worked hard in trying to provide the best
service diagrams, therefore, to avoid clut-
tered diagrams, we excluded some compo-
nents from the service diagrams. Our pro-
fessional staff carefully selected to excluded
components that are unlikely to fail.
Test Point Measurements
The measurements labeled on the service
diagrams are approximate values and may
vary slightly. These measurements are de-
pendent on the accuracy of the test equip-
ment.
It is strongly recommended that the test
equipment calibration schedule be followed
as stated by the manufacturer. RF probes
should be calibrated for each frequency in
which tests are going to be performed.
The types of probes used will also affect mea-
surement values. Test probes and cables
should be tested for RF losses and loose con-
nections.
Because of the sensitivity of RF, measured
readings will be greatly affected if they' re
taken in certain locations. To get the most
accurate readings, take measurements near-
est to the labeled measurement on the ser-
vice diagram.
©1999 Motorola, Inc.
Service Diagrams
B-1
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