NAD M56, Service Manual

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TRAINING MASTER FOR BLU-RAY (BD)
4. NOISE/AUDIO PROBLEMS
4-1. No Audio
The customer is not able to get audio.
What cables is the customer
using to connect the BD?
NO
YES
Determine what cables the customer is using to connect the BD
to the TV and if connected properly. Refer to OM for connections.
Tighten any loose cables. Make sure the customer has audio cables
connected if using an HDMI to DVI adapter or video-only cables
(DVI, component, etc).
Is the customer
able to see video?
NO
YES
Make sure the customer has not routed video
and audio to separate inputs.
Does issue occur on
more than one disc?
NO
YES
Problem occurring on one disc indicates a problem with the disc.
Problem occurring on multiple discs could indicate a lens cleaner
is needed. The customer can purchase a lens cleaner at any
electronics retailer.
Problem occur when
watching TV program?
NO
YES
No audio from a TV program on a different channel or input means
there is a problem with the television. If a TV program does have
the audio, the problem may be the BD player, the cables being used,
or the TV itself.
Does the problem occur
when BD is connected to
another TV?
NO
YES
Audio is fine when the BD is connected to another TV
indicates the problem is with the television. Refer to
the owners manual for assistance with connecting BD to another TV.
Has the customer tried
another set of cables?
NO
Have the customer try another set of cables. A bad cable can also
cause audio problems. Test the cable with another device to
the TV to also determine if the TV is bad. If BD is problem,
please see service chart for service information.
3-14