Motorola solutions ST7500 - Performing Vacuum Leak Test; Figure 53: Vacuum Leak Test Setup

Motorola Solutions Part Number:
TL000116A01
Supplier Part Number:
MT057#17
5.8.1.1
Performing Vacuum Leak Test
This test is performed to determine if the radio is properly sealed.
Prerequisites:
• Remove the antenna, side escutcheon, and battery cover from the radio.
• Remove the ventilation label and GORE membrane.
• Cover the vent hole with the leak test spacer, ensuring no air leak through the spacer seal.
• Reassemble the battery cover.
Procedure:
1 Attach the vacuum hose to the vacuum leak tester.
2 To verify that the leak tester is functioning, check the leak tester and the hose for leaks by
blocking off the open end of the hose and operating the leak tester a few times.
3 Ensure that the difference between the maximum and minimum fluctuation readings of the
gauge pointer remains within 0.05 inHg.
NOTICE: The actual reading of the gauge pointer at this point is not important.
Figure 53: Vacuum Leak Test Setup
Compressor
Direction of air flow
Radio
Leak
Tester
4 Block the open end of the hose and adjust the leak tester so that the gauge shows 3.30 inHg.
5 Attach the open end of the hose to the leak text fixture.
6 Ensure that the suction cup on the radio leak test fixture is in good condition (no damage or
dust).
7 Place the radio in the leak test fixture with the battery cover facing upwards.
8 Push down the handle of the fixture plate.
MN004528A01-AF
Chapter 5: Maintenance
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