Model W9 - Motorola ASTRO SPECTRA Service Manual

8-4
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.
11. 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.
12. 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
13. 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.
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C a u t i o n
14. For dash-mounted radios, plug the interconnect board into the radio, then plug in the control
head assembly and fasten it with the two front panel screws (torqued to 4-6 in.-lbs).
OR
For remote-mount control heads, replace the front panel into the remote control head back
housing, make sure the gasket is in place, then torque the screws to 4-6 in.-lbs. Replace any
plugs and cables on the rear of the control head.

8.2.2.3 Model W9

NOTE: Before disassembling the W9 control head, note the location of the labeled bottom.
NOTE: Refer to
Table 11-4, "Model W9 Pushbutton Control Head Parts List," on page 11-5
numbers in this section.
1. Using a Torx T15 driver, remove the two 30mm machine screws [29] from the back housing
[31] of the control head.
2. Fold the front housing [41] over so that the front housing is face down and the back housing is
on your working surface with the flex cable [18] attached.
February 3, 2003
Disassembly/Reassembly Procedures: Replacement Procedures
right and snaps on the left. This will facilitate assembly.
prior to attaching the PC board to the spacer.
Take care to avoid misalignment of connector pins. On dash mount
radios, remove the radio top cover to allow visual inspection during
connector alignment.
Figure 11-4: "Model W9 Pushbutton Control Head Exploded View," on page 11-5 and
for the callout
6881076C20-E