JBL manual A humming sound is present in the audio, The SDP-40is exhibiting erratic behavior

SDP-40

Troubleshooting & Maintenance

A humming sound is present in the audio.

1.If a cable TV connection is present, disconnect the cable from the wall outlet. If this eliminates the humming sound, a ground loop isolation device is required. Contact an authorized Lexicon dealer or the cable provider for assistance.

2.Disconnect components one at a time to isolate the problem. Once the problem is identified, make sure the associated component is properly grounded and connected to the same electrical circuit as the SDP-40.

The SDP-40 is exhibiting erratic behavior.

1.Set the rear panel power switch to the c (“off”) position. Wait 10 seconds. Then, set the rear panel power switch to the(“on”) position.

2.Use the SDP-40 configuration tool to download the current SDP-40 configuration to a personal computer (PC) or document all user-defined settings on the installation worksheet that begins on page A-19. Then, follow the instructions on the next page to restore factory-default settings.

The SDP-40 is powered on, but there is no video.

1.Examine the video cables – particularly the S-video cables – to ensure a solid connection between the SDP-40 and the associated component.

2.Check the INPUT SETUP menu VIDEO IN and COMPONENT IN parameters to make sure the appropriate video connector is assigned to the selected input.

RF interference is present in the audio or video signal.

1.Make sure the SDP-40 is not positioned near unshielded TV or FM antennas, cable TV decoders, and other RF-emitting devices.

2.Replace unshielded cables with shielded cables whenever possible.

If all else fails . . .

1.Set the rear panel power switch to the c (“off”) position. Wait 10 seconds. Then, set the rear panel power switch to the(“on”) position.

2.Use the SDP-40 configuration tool to download the current SDP-40 configuration to a personal computer (PC) or document all user-defined settings on the installation worksheet that begins on page A-19. Then, follow the instructions on the next page to restore factory-default settings.

3.Contact an authorized JBL dealer.

4.Contact JBL customer service at 818-830-8757.

Note:

Visit http://www.jblsynthesis.com/ for additional troubleshooting information.

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