Service manual

• When the knob is properly inserted, the arms
of the switch bracket will snap into position
(approximately 0.2 inches apart), the knob will
not be loose in the switch bracket, and the
bracket will hold the switch firmly against the
inside of the top control panel. If this is not the
case, replace the switch bracket.
C. Reassembly
Reassemble the radio in the reverse order of
disassembly, referring to "Servicing Major Subassem-
blies" (paragraph B) and making certain:
1. that the protruding block that functions as the PA
heatsink (inside back casting), is coated with a
thin film of thermal compound (Motorola part num-
ber 11-10022A55), which helps provide maximum
heat transfer;
2. that the RF board is properly seated in the chas-
sis, and that when inserted, the five locking tabs
on the center shield are engaged with the chassis;
3. that when the controller board is reinstalled over
the center shield and mated to the RF board, the
connector plug of the controller is pressed firmly
into the connector jack of the RF board (the two
boards should snap together);
4. that when installed, the four controller shield
screws are torqued per specifications;
5. that the control top/PTT flex plug, speaker/micro-
phone flex plug, and display flex plug have all
properly mated with their corresponding connector
jacks;
6. that the keyswitch overlay is pressed firmly
against the LCD metal bezel of the front shield
assembly;
7. that there is no foreign material on the main O-ring
or stud seals;
8. to properly orient the completed chassis assembly
before inserting it into the radio housing;
9. that the PTT switch and monitor button are not
depressed while the chassis is being inserted into
the housing;
10. that the slotted-spanner nut closest to the battery
latch is torqued first, then torque the other to the
proper specification listed in Table 13.
22
CAUTION
Inspect the chassis stud seals and the control
top panel O-ring and replace if any damage
exists.
Table 13. Torque Specifications
Application Torque Torque Torque
(in -lbs) (N•m) Bit Part No.
RX/TX Switch Spanner Nut 20 2.27 66-80371B34
Frequency Switch Spanner Nut 8 0.91 66-80371B03
Power Contact Screws 2.5 0.28 66-80321B79
Slotted-Spanner Nut (Baseplate) 6 0.68 66-80370B89
Volume Pot Spanner Nut 8 0.91 66-80371B03
Controller Shield Screws 2.8 0.32 66-80321B86