Page 7 of 23
DWG ID: 181-0101-01
Date: 2003-08-12
4.2.5
If your unit has an I/O, A3, CCA
This will be the CCA on top. If your unit does not have an I/O CCA the Controller, A2,
CCA will be on top. In either case the top CCA is held on by three #4 screws and lock
washers.
4.2.6
To remove the Controller, A2, CCA
Either remove three #4 screws with lock washers or, if your unit has an I/O, A3, CCA
and that is removed, remove three standoffs. After removing the three screws or
standoffs, remove the #4 hardware holding the heat sink tab of voltage regulator A2VR1.
Remove the two #2 self-tapping screws that hold the Controller CCA to the radio
transceiver heat sink at left rear of unit. Turn unit upside down with left hand, grab
Controller CCA with right hand, and pull Controller CCA off of radio transceiver by
rocking slightly front to back so mating connector will come apart. Watch for the four #2
flat washers that will fall off and ferrite beads on the leads of connector A2P1.
4.2.7
To remove the radio transceiver, A1, CCA with heat sink plate
Remove two standoffs from near the front.
4.2.8
To remove the radio XCVR from the heat sink plate
Remove two #2 screws and lock washers.
4.3
Unit Assembly
Assembly is the reverse of disassembly.
Be sure to use silicone heat sink compound
•
Between radio transceiver heat sink and heat sink plate
•
Between heat sink plate and inside of rear panel
•
Between outside of rear panel and finned heat sink
•
Between voltage regulator, A2VR1, heat sink tab and chassis
•
Between chassis top lip and inside of top cover
This all for best heat flow.
To assemble the Controller, A2, CCA to the radio transceiver assembly, A1:
•
Place the #2 self-tapping screws in their holes
•
Place masking tape over their heads to hold them in place
•
Turn the Controller CCA upside down
•
Place 4 #2 flat washers, two each, over the #2 screws
•
Install 6 ferrite beads, 3 each over A2P1-1 and A2P1-7
