Disassembly/Assembly
62
NOTE: • Bubbles from the Seal Port are normal, but the
bubbles from the edge of the Label Seal, are
considered leakage.
7. Note all of the seal areas that show signs of leakage. Pinpoint the problem(s)
to one (or more) of the following areas:
- Front Housing
- Chassis (Seal Port and Label Seal)
- Frequency switch and Antenna nut
- Main Seal O-ring
- Battery Seal
8. Remove the radio from the water container, and dry the radio thoroughly. Be
especially careful to dry the area around the main seal to prevent
contamination of the internal electronics while the unit is open.
9. Remove the adapter from the chassis.
10. Radio after performing Pressure Test must undergo baking process in a
temperature chamber for constant temperature soaking at 60°C for 1 hour.
This is to ensure no moisture is trapped inside the radio and prevent
contamination of the internal electronics after reassembling the radio.
11. Install a new Base Plate Seal by using a pair of needle-nosed tweezer, and
then screw the Hex Nut. Ensure that the Hex Nut sits flat all around the edges
and it is flushed with (or below) the casting.
12. Inspect the Seal Port to ensure that the seal behind the Label Seal’s three
slots has not been punctured. If it has been punctured, the seal and the label
must be replaced.
Troubleshooting
Leak Areas
Before repairing any leak, first read all of the steps within the applicable section.
This will help to eliminate unnecessary disassembly and reassembly of a radio with
multiple leaks. Troubleshoot only the faulty seal areas listed in Section “ Pressure
Test”, and when multiple leaks exist, in the order listed.
NOTE: Before reassembling the radio, always install a new main seal O-
ring, Battery Seal in the defective area.
Front Housing Do one or both of the following:
1. If a leak occurs at the Lens, Universal Connector, Casting/Housing interface,
PTT button area of the housing, replace the housing. Refer to Section “Radio
Disassembly—Detailed” on page 46.
a. Remove the housing assembly from the radio.
b. Discard the housing assembly and main seal O-ring.
c. Install a new main seal O-ring around the casting assembly.
d. Install a new housing assembly to the radio.
Keep the area around the Seal Port dry by ensuring that there
is no water around the casting’s vacuum port.
C a u t i o n
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