W4, W5, And W7 Reassembly; Figure 8-2. W5 And W7 Pushbutton Control-Head Assembly Screw Sequence - Motorola ASTRO XTL 5000 Basic Service Manual

Disassembly/Reassembly Procedures: Replacement Procedures

Figure 8-2. W5 and W7 Pushbutton Control-Head Assembly Screw Sequence

7. Carefully separate the printed circuit board, internal spacer, and elastomer keypad assembly
from the front panel.
On rotary control-head models, care must be taken not to damage the flex circuit when
separating the printed circuit board from the front housing. Do not disturb the buttons in the
front panel.
On rotary control-head models, the flex circuit must also be unplugged.
8. On rotary control-head models, desolder the XMIT and BUSY LED before removing the
elastomer keypad.
9. Remove the elastomer keypad from the printed circuit board.
NOTE: Before you unsnap the PC board, notice that the board slips under a hook on the
10. Remove the PC board from the internal spacer. The PC board snaps into and out of the
spacer.

8.2.2.4 W4, W5, and W7 Reassembly

NOTE: For the following procedure, refer to
on page
reassembled.
1. To reassemble, snap the PC board into the internal spacer. Before you press the elastomer
keypad into the board, make sure that the conductive pads in the board and the elastomer
keypad are clean and free of any foreign material.
2. On rotary control-head models, solder the XMIT and Busy LEDs onto the PC board.
NOTE: On rotary control-head models, the flex circuit must be connected to the PC board
3. Install the PC board internal spacer and elastomer keypad assembly into the front panel.
Replace the screws and torque them to 6-8 in.-lbs.
!
C a u t i o n
6881096C73-O
6 1
3
5
right and snaps on the left. This will facilitate assembly.
11-1, for the exploded view and associated parts list applicable to the model being
prior to attaching the PC board to the spacer.
When reassembling the control head, make sure the
microphone pins are properly inserted through the elastomeric
keypad. Also make sure the elastomeric keypad inserts are
secured to the PC board.
4
2
Chapter 11. Exploded Views and Parts
8-5
7
Lists, beginning
June 11, 2003