Figure 17 Installing The Final Device; Figure 18 Removing Memory Board - Motorola Spectra Service Manual

c. Solder three leads of Q9500 pass device.
d. Install the PC board and attach and tighten the
screws in the sequence shown in Figure 16.
e. 30-watt only - Install the final device with two
screws. Figure 17 shows the properly oriented
final device.
f. Place the power module shield over the power
module. Install power module and shield with
two compression washers and screws.
g. 30-watt only - Solder the final device leads and
five capacitors. Capacitors must be soldered
flat to the board and each capacitor surrounding
the final device must be soldered as close to
the device as possible.
h. Solder power module leads, module shield, and
transistor leads (30-watt only).
i. Install the red power lead.
INSERT GXW-4349-O
PICKUP FROM PAGE 40
Figure 17. Installing the Final Device
4. Install Back End
a. 12-watt - Carefully position the RF cables
through the slots in the PA shield and install the
shield. Fold the RF cables under metal clips
and install the two plastic clips.
b. 4-watt and 30-watt - Push the RF cables
through the slots in the PA compartment. Install
the feed-thru plate, making sure the RF cable is
routed under the plate. Install the RF cable clip,
making sure the cable is routed under the clip;
fold cables.
c. Connect the large ribbon cable connector to the
command board connector. Connect the small
connector to the PA. Connect the RF cables to
their respective boards in the chassis.
d. Be careful not to pinch the RF or ribbon cables;
position the PA assembly on the chassis.
Install the two Allen-head screws through the
heatsink. Before tightening the mounting
screws, check that command board connector
and RF connectors are in place. Tighten the
mounting screws.
e. 4-watt and 30-watt only - Press PA compart-
ment shield and install PA cover.
44
f. Install radio's top and bottom covers.
5. Alignment
Perform the "Power Set and Current Limit Adjust-
ment." See ALIGNMENT VIA IBM PERSONAL
COMPUTER for procedures.
D. HearClear Board
1. Remove the radio covers. Lift off the command
board cover (earlier models only).
2. Remove the original HearClear board and replace it
with the new HearClear board at connector P0501
on the command board.
3. Reassemble the command board and radio
covers.
E. Memory Board
If you want to keep the information currently stored in
the radio code plug, save its contents using the IBM
PC and radio service software before you remove the
original memory board. Refer to the radio service
software user's manual for more information.
1. Remove the radio covers. Lift off the command
board cover (earlier models only).
CAUTION
To remove the memory board, gently pry the board
up at the center of the connector end of the board
(see Figure 18). This will help prevent damage or
bending the connector pins.
Figure 18. Removing Memory Board
2. Remove the original memory board and replace it
with the new board at connector P0505 on the com-
mand board.
3. Reassemble the command board and radio
covers.
Replacement memory boards are preprogrammed to
enable the radio to function only at a test-mode level.
To restore the radio to complete operation, you must
initialize the memory board via the radio service soft-
ware "BOARD REPLACEMENT" procedure.
CAUTION
Once initialized, a replacement memory board may
not be initialized a second time. Use the radio test
modes to ensure that replacing the memory board
will solve the problem before you initialize it.
NOTE
NOTE