Motorola T189, Service Manual, Page: 20 / 88

4.1 Disassembly Introduction
The T189 is held together by 6 screws, 2 uppermost and 4 within the battery casing. Ensure care is
taken when removing the LCD from the main PCB as the flex is very delicate and can be easily
damaged.
Ensure that a properly grounded high impedance conductive wrist strap is used whilst performing any
tasks during the disassembly and assembly of the unit
Avoid stressing the plastics in any way to avoid damage to either the plastics or internal components.
!!
Many of the intergrated devices used in this equipment are vulnerable to damage from
electro-static charges. Ensure that adequate static protection is in place when handling,
shipping and servicing the internal components of this equipment.
4.2 Recommended Tools
The following tools are recommended for use during the assembly / disassembly of the T189.
•
Anti-static Mat Kit - 0180386A82, includes:
Antistatic mat 66-80387A95
Ground Cord 66-80334B36
Wrist Band 42-80385A59
•
Plastic Bladed Tool SLN7223A
•
T6 Torx Driver
4.3 Disassembly Procedure
The following set of diagrams will demonstrate the correct sequence and action required to disassemble
the T189
.
4.4 Assembly Procedure
Once the unit is disassembled and the repair is carried out, the unit must then be reassembled, this is
carried out in the exact reverse order as the disassembly.
!! CAUTION !!
Many of the intergrated devices used in this equipment are vulnerable to damage from
electro-static charges. Ensure that adequate static protection is in place when handling,
shipping and servicing the internal components of this equipment.