Lexicon RV-8 Service Manual page 72

Temperature Test
This test verifies the temperature measurement circuits in the RV-8.
Test:
1. Verify the display indicates the temperature of Amp1 (xx = approximately 30-40 (C):
"TEMP TEST
AMP1: xx degC"
2. Rotate the encoder knob slowly clockwise and verify that the temperature measurements for Amp2:
through Amp7: are within 30-40° (C).
Note:
The temperature is affected by the environment around the RV-8 under test. In a warmer location, the
temperature readings will be higher.
Fan Test
This test checks the operation of the internal fans using the encoder knob to select the fan speed and
verifies that the speed of the fans increases with each increment of the fan speed indicator. The fans are
located at the bottom of the RV-8 chassis. Two fans are on the left side and two are on the right side of
the unit.
Setup:
The front panel display should indicate:
"FAN TEST
FAN Speed: 0"
Test:
1. Turn the encoder knob slowly clockwise until the display indicates: "FAN Speed: 1"
2. Verify that the fans have started turning.
3. Turn the encoder knob slowly clockwise until the display indicates: "FAN Speed: 2"
4. Verify that the speed of the fan speed has increased from previous step.
5. Turn the encoder knob slowly clockwise until the display indicates: "FAN Speed: 3"
6. Verify that the speed of the fan speed has increased from previous step.
To verify all four fans are working:
1. Place your fingers under the chassis on the sides and feel for the draw of the fans.
2. Press the Mode
Diagnostic Tests Completion
When the Diagnostic Tests are complete, the unit will display the test results. Verify the display indicates:
"FUNCTIONAL
TESTS Passed"
5-18
button to proceed to the next test.
RV-8 Service Manual