P7689 / P7789 4.1 Disassembly Introduction The P7689 is held together by 5 screws. 2 of these screws are placed under the escutcheon, at the top of the phone.Unlike most products in the past there is no flex that holds the display module, this is held in place with 4 clips. Also note that unlike the P7389 instead of a sixth screw on the edge of the middle of the unit there is now a hinge see Page 6 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. !! 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. 4.2 Recommended Tools The following tools are recommended for use during the assembly / disassembly of the P7689. 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 P7689 The use of the exploded diagram on pages 24 & 25 may be of some assistance for part recognition. 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. Although the housings are put back together parrallel to each other not ‘hinged’ apart as in disassembly. of 59 GSM Field Service Support 26