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The following chart lists conditions and possible causes of several specific
malfunctions. If a particular part is mentioned (R23 for example) as a
possible cause, check that part and other components connected to that part
to see that they are installed and/or wired correctly. Also check for solder
bridges and poor connections in the surrounding area. It is also possible, on
rare occasions, for a part to be faulty and require replacement.
PROBLEM
POSSIBLE CAUSE
Meters inoperative, PEP-AVG switch in AVG position.
1. Shorting wire still on meters.
2. Sensitivity control wiring.
3. No RF through remote sensor.
4.
Sensor cable connections on the circuit board.
Meters inoperative, PEP-AVG switch in PEP position.
1. Battery dead.
2. Integrated circuit U1.
3.
Solder bridge on circuit board foil.
Battery check produces no meter movement.
1.
Battery dead.
2.
Resistor R6.
3.
Battery switch SW5.
4.
PEP-AVG switch set to AVG (out).
Unable to calibrate PEP circuit.
1.
Solder bridge on circuit board foil.
2. Battery weak or dead.
3. Check PEP circuit components for correct installation.
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