Motorola APX 7000 Basic Service Manual page 257

Disassembly/Reassembly Procedures: Ensuring Radio Submergibility
6. Operate the pump until the gauge reads approximately 1 psig.
7. Maintain the pressure around 1 psig and submerge the radio into a water-filled container.
8. Watch for any continuous series of bubbles. A steady stream of bubbles indicates a sign of
leakage.
NOTE: Some accumulation of air may be entrapped in the main housing which may cause a false
diagnosis of a leak. Ensure there is a steady stream of bubbles before concluding there is a
leak.
9. Note all of the seal areas that show signs of leakage. Rotate the radio to view all sides to
pinpoint the problem(s) to one (or more) of the following areas:
• Seal Interfaces
• Speaker Assembly
• Battery Connector Seal
• Main Chassis, including the Control Top
• Back Chassis
10. Remove the radio from the water container and dry the radio thoroughly. Be especially careful
to dry the area around the Memory Door (28).
11. With the Radio in an upright position and Control Top up, remove the vacuum adapter by
squeezing the release latches, and pulling the adapter down and away from the radio.
12. Ensure the area around the Memory Door (28) opening is dry.
13. Dry the remainder of the radio and remove the Grille Eliminator.
14. See "8.10.9: Troubleshooting Leak Areas" on page
Pressure must remain between 0.5 psig and 1.5 psig.
Pressure lower then 0.5 psig may allow water into the radio,
which will damage the radio.
Ensure that the pressure NEVER exceeds 1.5 psig. The radio
has pressure sensitive components that can be damaged if
the pressure exceeds this limit.
To avoid equipment damage, keep the area around the
memory card opening dry to prevent water from entering the
radio.
2:8-38.
Sec 2: 8-37