Motorola T189, Service Manual

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6.1 Repair Introduction
The T189 is divided into 3 main sections when it comes to part replacability: The Flip which contains
the speaker,battery connections, RTC battery and Vibrator. The housings that contain the main PCB
which contains RF / Logic circuitry. The third component is the the keypad and Display Assy. If the
RF / Logic board is required to be changed then a full service tranceiver should be ordered as there is
no replacement PCB available. Also a personality transfer would be necessary.
6.2 Mechanical repairs
Assembly replacement level troubleshooting and repair of the T189 is limited to isolation and
replacement of the main mechanical parts only (See Exploded parts diagram and associated parts list)
6.3 Basic Modular Troubleshooting
The troubleshooting information in Table 2 shows some typical malfunction symptoms, and for the
corresponding verification and repair procedures refer to the disassembly instructions located in the
disassembly section of this manual.
(Section 5).
NOTE Defective Logic/RF assemblies must be replaced
with pre-tested, pre-phased assemblies