NAD stereo receiver 7130: when turned phono mode sometimes there is weak or no sound yet sometimes it sounds fine. What can be the problem ? This is only in phono mode, not CD tinnier or video.

connections 3 or 4 on preamp. Turntable requires pre amp out from preamp to amp.

if you are reffering to a radio fm receiver, the issue is the signal strength is too low.so the multiplex transmission cannot be correctly unscrambled.mono reduces the cross channel interference.
use a high gain 12 db or above external vhf antenna to solve this problem

Hi
Two dump question and than recommendation..

• First ;During listening FM ,Your " MUTE" switch is "ON" or "OFF" ? if not how about plain STEREO mode ? did you try it ?

• Second..how about the other Modes , i.e ..CD ,DVD etc. ? same problem or it happens only in FM ?

ok..now the possible solution;
sometimes FM stations do not properly triggers pro-logic circuit and cause such problem and you need to switch to STEREO or A.F.D mode to listen FM (AFM includes sub woofer)..
This is true for FM only and it should not happen in other modes as DVD ,CD,Phone etc..
Hope this helps!..if more help requires pls let me know.
Take care and please Remember to rate/vote and give me 4 Thumbs Up for me to continue for Helping out the Community :)

Have you looked at the manual? There is no internal source that would produce 7.1 audio other than the test tones. Attach a multichannel source according to ITS manual.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/NAD-T763-Receivers-manual/id/8043bh646/t/2/

Maybe an FM amplified indoor antenna could help you to get a stable FM signal.

The AT-PL120 uses a magnetic cartridge to extract a music signal from the record. Magnetic cartridges all put out a very weak electric signal, and so their output must be strengthened, or amplified, to where it is as strong as the input from, say, a CD player. This amplification is provided by a pre-amp. If your receiver has dedicated "phono" inputs the pre-amp circuits are already in the receiver. If you do not have dedicated phono inputs you must either buy a pre-amp, or buy a magnetic cartridge turntable with a pre-amp built into itself. The AT-PL120 has a built in pre-amp. You can switch the AT-PL120's preamp on or off. The switch is located under the platter at the back side of the turntable. Take the platter mat off and turn one of the platter's holes to the back and you should see the switch through the hole. If you push the switch to LINE OUT the preamp is turned on and the turntable sends an amplified cartridge signal out the cables which MUST be connected to a receiver inout suitable for a CD player (a "high level" input). If you push the pre-amp selector switch to PHONO OUT the turntable sends the weak unstrengthened cartridge signal out the cables which MUST be connected to the receiver's dedicated PHONO inputs so the signal can be amplified with the receiver's own pre-amp circuits.

If everything is set wrong (i.e. LINE OUT (pre-amp on), and connected to phono inputs) you are applying two steps of strengthening to the turntable's signal which is too much. The resultant sound will be garbled. Try not to do this!

The other way to do everything wrong is set the pre-amp switch to PHONO OUT (pre-amp off) and connect the turntable's cables to a high level input. If this happens the turntable signal receives no amplification and the resultant sound will be thin and weak.

The contacts in the A B speaker selector switch had degraded on my NAD 7130 receiver. Distortion and signal loss would come and go. Contact cleaner and wriggling the swx knob became useless. Then, years ago I jumped the swx with small lengths of bare wire and tinned the whole thing with solder. Never had a problem since and it probably improved the receiver because it eliminated a component in the output stage that could (and did) introduce distortion.

try to calibrate the speakers from audessy rom menu,i did it and it lokes like it just needed to register all the channels,hope it helps.

If this reciever dosen't a phono inpur you need a phono pre-amp you can get one on e-bay for about 15.00

what was your amp? ic or transistorized? the output transistor of your amp may be opened, mostly it will short but because u still hear sound, maybe open and only the driver transistor are working. replacing output transistor or IC could solve the problem.