It began already a few years ago. I could only listen to the radio, if I switched from stereo to mono. Otherwise no or only poor reception. In the meantime no FM reception no more - neitehr in stereo, nor in mono. Any idea ??? (I already checked antenna cable)
Hello Reference No Part Number Description M751*AH 5120-0200-0 Fuse 5A 125V Time Lag 5x20 MM MITI/UL/CSA M754*AH 5120-0052-0 Fuse 1.6A 250V Time Lag 5x20 MM UL/CSA
There are three fuses with your NAD surround receiver.
M752*C 5120-0024-0 Fuse 3.15A 250V Time Lag 5x20 MM SEMKO/VDE
Check them first and inform me which one has blown out. I'll give you detais after that. OK.
All the three fuses are on [PSU] board.
...I suppose...no... none of them is blown. Voltages are up and stable (due to my informations). It seems to me if the the stereo decoder chip TA-XXXX is faulty or its ceramic filters...the rapair shop told me so...he asserted, that FM reception is working, but only in mono, not in stereo. If you switch to stereo, the reception/output fails...
BR
Styrian
Greetz, Styrian
Hello
The service technician may not be wrong. He may have checked the decoder board. Normally decoder chips will be of SMD [Surface Mount Type]. If so it is really a skilled jobe to replace them. If you can get the decoder as card basis, replace it with a new card. It will be best. OK.
...uhhhh...verrrrry fast answer..thanx. I told this issue to my friend. He told me to check the voltage after the switched power supply concerning ripples and harmonic distortions. I have an oscilloscope of my own, so I can check this. He assumes, that a electrolytic capacitor fails, because the problem arose slowly. Nevertheless thank you for your really fast reply....or do you have any other ideas ???
Bye, Styrian
...uhhh..very fast reply...thank you. I told this issue to my colleague. He told me to check the DC voltage concerning ripples because of its switched power supply design. He mentioned, that it might be that harmonic distortions might influence the AGC. I own an oscilloscope, so I can check this issue. Do you have any other ideas/ advices ???
BR
Styrian
...he assumed bad electrolytic capacitors because this issue arose within the last years and not suddenly. I'll hope so. Otherwise it will be very difficult to obtain the radio board, because the NAD T760 is an exotic device and the support here in the region is very bad...
BR, Styrian
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Chapter 6:
Using the tuner
Listening to the radio
The following steps show you how to tune in to FM and
AM radio broadcasts using the automatic (search) and
manual (step) tuning functions. If you already know the
frequency of the station you want, see Tuning directly to a
station below. Once you are tuned to a station you can
memorize the frequency for recall later-see Saving
station presets below for more on how to do this.
1 Press the FM/AM button to select the tuner.
2 Use the FM/AM button to change the band (FM or
AM), if necessary.
Each press switches the band between FM and AM.
3 Tune to a station.
There are three ways to do this:
Automatic tuning
To search for stations in the currently selected band,
press and hold TUNE ?©/?? for about a second. The
receiver will start searching for the next station,
stopping when it has found one. Repeat to search for
other stations.
Manual tuning
To change the frequency one step at a time, press
TUNE ?©/??.
High speed tuning
Press and hold TUNE ?©/?? for high speed tuning.
Release the button at the frequency you want.
Improving FM stereo sound
If the TUNED or STEREO indicators don't light when
tuning to an FM station because the signal is weak, press
the MPX button to switch the receiver into mono
reception mode. This should improve the sound quality
and allow you to enjoy the broadcast.
Using Neural THX
This feature uses Neural Surround™, THX® technology to
achieve optimal surround sound from FM radio.
• While listening to FM radio, press AUTO/DIRECT for
Neural THX listening.
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