Figure 14 Control Head Assembly Screw Sequence; Figure 15 Rotary Control Head Assembly Screw And Snap Sequence - Motorola Spectra Service Manual

5. Remove the PC board from the internal spacer.
The PC board snaps into and out of the spacer.
IMPORTANT NOTE
Early model radios used a flex cable to interconnect
between the command board and the control head.
Your radio has the flex cable if it is one of the follow-
ing model numbers:
D27KGA5JB5AK
D37KGA5JB5AK
D37KGA5JB7AK
D37KGA5JB9AK
D37KMA7JA5AK
D37KMA7JA7AK
If you elect to replace the control head with a new
assembly that has the electronic on/off switch (board
kit no. HLN6075), do so following these instructions:
Remove and discard the flex cable.
Install a new back housing (part number 15-
80111L02) or modify the original back housing
(15-80111L01) by removing the two tabs which hold
the flex cable to the back housing, being sure that no
tab material remains to interfere with the new control
head assembly.
Install a rigid interconnect board (HLN6285A) in
place of the flex cable.
IF YOUR RADIO IS NOT ONE OF THE ABOVE
MODELS, DISREGARD THIS NOTE.
On rotary models, the flex circuit must be connected
to the PC board prior to attaching the PC board to
the spacer.
6. If you have an rotary model, solder the XMIT Busy
LEDs onto the PC board.
7. Snap the new PC board into the internal spacer.
Before you press the keypad into the board, make
sure that the conductive pads in the board and the
keypad are clean and free of any foreign material.
8. Install the PC board internal spacer and elastomer
keypad assembly to the front panel. Replace the
screws and torque to 6-8 in.-lbs. in the sequence
shown in Figures 14 and 15.
9. For dash-mounted radios, plug the interconnect
board into the radio, then plug in the control head
assembly and fasten with the two front panel screws
torqued to 4-6 in.-lbs. For remote mount control
heads, replace the front panel into the remote con-
trol head back housing, ensuring the gasket is in
place. Torque the screws to 4-6 in.-lbs. Replace
any plugs and cables on the rear of the control
head.
42
NOTE
Take care to avoid misalignment of connec-
tor pins. Remove the radio top cover and
command board cover (earlier models) to
allow visual inspection during connector
alignment.
6 1
3
5
Figure 14. Control Head Assembly Screw Sequence
8 5
3
4
Figure 15. Rotary Control Head Assembly Screw
and Snap Sequence
B. Remote Control Head Interface Board
Replacement
1. Unplug the microphone. Disconnect the control
cable from control head on remote models.
Remove the two front panel screws (use a 2.5mm
hex key driver). Grasp the front panel firmly and
carefully unplug the control head assembly from the
radio or remote control head back housing.
2. Remove the two remote interface board attachment
screws.
3. Remove the remote control head interface board
from the remote control head back housing.
4. Attach the new interface PC board to the back
housing with two screws torqued to 6-8 in.-lbs.
Reassemble the back housing to the front housing
with two screws torqued to 4-6 in.-lbs.
CAUTION
4
2
MAEPF-22823-O
7
2
MAEPF-21438-O
7
1
6
MAEPF-21