Motorola i760, Field Service Manual

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68P80400P94-O
5-1
CHAPTER 5
BASIC LEVEL CHECKS AND SELF TESTS
Before you perform basic troubleshooting and self tests on an i850/i760 unit, determine if any
special conditions could affect testing and check the units for defective parts.
There are five categories of basic tests:
•
Preventive maintenance
•
Mechanical/electrical checks
•
Troubleshooting
•
Self tests
•
Technician tests
Test procedures are listed in the order in which they should be implemented. Each test contains a
description of what it does and the approximate time needed to perform it. For your convenience, a
checklist is included that can be used to ensure that all the necessary tests are conducted.
5.1 Customer Care
It is sometimes helpful to contact your regional Customer Care representative to determine if the
customer has service or billing issues or is known to be using the unit in a poorly covered area. The
representative also can inform you if there are system outages or known unit defects.
5.2 Test Conditions
During testing, ensure the following antenna conditions are adhered to. Reset conditions can be
comparatively difficult to diagnose.
5.2.1 Antenna Condition
For intermittent or no transmit problems, ensure the antenna stays fully extended or fully collapsed
at all times, never partially extended. If the antenna is loose or collapses halfway down, the unit can
lose up to 20 dB of radiated power.
5.2.2 Reset Condition
A reset condition can be the most difficult failure to duplicate because a reset can be caused by
software, hardware, system, accessory, and coverage problems. A severe hardware failure usually
can be detected immediately.