Disassembly/Reassembly Procedures: Ensuring Radio Immersibility 5-35
2. Refer to Section 5.6.2 "Chassis Disassembly" on page 5-10, remove the Main Board from
chassis.
3. Remove the main seal O-ring.
4. Inspect the seal area around the chassis for foreign material that might prevent the main seal
O-ring from sealing properly.
5. Assemble a new O-ring; discard the old O-ring.
6. For detailed O-ring assembly sequence, refer to clause 2, step i. to step viii. of Section 5.7.3
"Chassis Reassembly" on page 5-23.
7. Reassemble the chassis assembly followed by installing into Front Cover. (Refer to Section
5.7 "Radio Reassembly - Detailed" on page 5-19).
8. Inspect the main seal O-ring for proper seating. Observe carefully to ensure that the main
seal O-ring is not pinched between the housing and the chassis.
5.8.9.3 Battery Contact Seal
To replace the Battery Contact Seal:
1. Refer to Section 5.6 "Radio Disassembly – Detailed" on page 5-6 to remove the Battery
Contact Seal.
2. Remove the Battery Contact Seal from the Chassis.
3. Inspect the Battery Contact Seal, Chassis and surrounding areas for foreign material that
might prevent the Battery Contact Seal from sealing properly.
4. Install a new Battery Contact Seal; discard the old Seal.
5. Replace a new main seal O-ring; discard the old O-ring.
6. Reassemble the chassis assembly followed by installing into Front Cover. (Refer to Section
5.7 "Radio Reassembly - Detailed" on page 5-19).
7. Inspect the main seal O-ring for proper seating. Observe carefully to ensure that the main
seal O-ring is not pinched between the housing and the chassis.
IMPORTANT: Both Label Ventilation (5478220A01) and Gasket (3286058L01) need to
be replaced after vacuum test, pressure test or water leakage
troubleshooting.
NOTE
When installing the assembled chassis to the Front Cover, ensure the O-ring at the top two
corners are not dislodged from the chassis groove.
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