Ericsson LBI-38378D manual Speaker, Microphone and Flex Circuit Access

LBI-38378D

TION: Installation of screws that are longer than the origi- nals may damage the LCD Board, flex circuits or the threads.

To remove the Control Board, remove the Torx screw (E) in the lower left-hand corner that supplies battery power to the board. An earlier Front Cover Assembly has an addi- tional screw located just below connectors J1/P1 (EE). Lift the board and carefully unplug Speaker Flex plug P3 from J3 on the Control Board. Avoid bending this or any other flex circuits at sharp angles. The Control Board may now be removed. Note the battery power and ground connections at the bottom of the board where the screws have been re- moved.

Speaker, Microphone and Flex Circuit Access

Remove the Control Board as previously stated and then remove the six (6) Torx screws that secure the die-cast shield. Remove the die-cast shield by lifting the top end first and sliding it towards the top of the radio. The internal speaker, microphone, Keypad and UDC Flex circuits are now partially accessible. See Figure 9.

Figure 9 - Speaker, Microphone And Flex Circuit Access

UDC Flex/UDC/Monitor Button/PTT Switch Assembly Removal

If UDC Flex/UDC/Monitor Button/PTT Switch assem- bly removal is necessary, first un-solder the microphone. With a spanner wrench, remove the UDC securing screw (the UDC ground pin). Remove the insulator (foam or plas- tic) on the inside side-rail of the case. Lift the UDC/Monitor Button/PTT Switch assembly from the side of the case and slide the flex through the slot

Earlier Front Cover Assembly Keypad Flex Removal

To remove the Keypad Flex, first remove the UDC Flex/UDC/Monitor Button/PTT Switch assembly as pre- viously stated. Next remove the knobs using the hex driver. Unscrew the two (2) screws securing the top panel and lift and remove the panel. Lift the Emergency Button Board by carefully unplugging J6 from P6. With a spanner wrench, remove the nuts securing the volume and channel controls and carefully slide the controls inside the radio. Unscrew the two (2) screws (G and GG) and remove the J10/P10 Zebra strip securing plate (HH). See Figure 10. The Keypad Flex is now free for removal.

Figure 10 - Keypad Flex And LCD Board Access

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