Lexicon RV-8 Service Manual page 24

6. Locate the wire connection at the top of the switching supply.
7. With the DMM, measure the voltages on the connector using the black probe to chassis.
8. Yellow is +15 volt rail measure for a voltage range of +14.75V to +15.250V.
9. Blue is –15 volt rail measure for a voltage range of +14.75V to +15.250V.
10. Red is +5 volt rail measure for a voltage range of +4.75V to +5.25V.
11. Locate the two black six-wire connectors that run from the main power supply board in the middle of
the RV-8 to the two amp channels left and right of the chassis.
12. With the black lead of the DMM connected to the chassis, carefully probe the inside of each black
wire with the red probe. (Some pins contain +65V. Some pins contain -65V).
AM/FM Tuner & Headphone Output Tests
These tests confirm that the tuner and the headphone output in the RV-8 are functioning normally.
Test:
1. Attach both the AM and FM antennas to the back of the RV-8.
2. Connect the RCA front left and right outputs of the RV-8 to the external amplifier left and right inputs.
Connect the outputs of the external amplifier to the pair of speakers.
3. Power on the RV-8.
4. Press the remote control MAIN soft button.
5. Press the remote TUNER soft button.
6. The RV-8's display will display "Tuner" in the upper left, and the AM or FM radio station it is tuned to
in the upper right.
7. Raise the RV-8 volume to a comfortable level.
8. Randomly scan to different radio stations by pushing the TUNE/SEEK buttons on the front panel or
remote control, stopping at each station to listen for clarity.
9. Switch between the AM and FM bands by pressing the AM/FM button on the front panel or remote
control, checking stations for clarity.
10. Power down the external amplifier. Remove the cables from the outputs of the amplifier and connect
them to the RV-8's front left and right amplifier outputs.
11. Repeat steps 7 and 8 above, adjusting the volume on the front panel of the RV-8 to a comfortable
listening level.
12. Lower the volume on the RV-8, and plug a pair of headphones into the Phones jack on the front
panel.
13. Repeat steps 7 and 8 above adjusting the volume on the front panel of the RV-8 to a comfortable
listening level.
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RV-8 Service Manual