SECTION VII - MAINTENANCE & REPAIR
A. TROUBLE-SHOOTING
If the SBX-11A has been working satisfactorily and suddenly fails, check the following items in
the order given before proceeding with any further investigation:
1.
Are all switches and controls in the correct position?
2.
Is the battery voltage adequate?
3.
Is there good electrical contact at all antenna and ground connections?
4.
Is the antenna wire or feeder broken?
If there is not any indication of battery voltage with the power turned on, and you know the
batteries are new or in good charged condition, open the battery case and:
5.
Check the polarity of each battery (refer to diagram in battery case).
6.
Check the fuse and replace with spare if necessary.
7.
Make certain that the battery plug is fully engaged.
NOTE: If the battery voltage is low with good batteries, the temperature may be too low
for the battery type in use. See battery section.
If the above points fail to reveal the trouble, technical assistance will be required
before the following points can be considered:
8.
Remove the set from the case, see Section VI, subsection (c).
9.
Make a visual inspection of all components.
10. Check relay operation.
11. Check operation of all three oscillators.
