NAD T743: The digital channels stop working after a short time.
When listening to AM/FM or the analog input on the front the unit works fine. When listening to any digital input (DVD/CD on coax digital or TV on optical digital) the sound stops after a while. Before the sound stops entirely there is some scratching and boom sounds (not loud). I usually have the volume set quite low. The config of the system has´nt changed for years so that´s not the reason. Could it be a cirquitboard that bends when i gets hot and cracks the soldering? Can the reason for this be that the fan doesn´t activate since i dont run the unit on high volume?
Re: NAD T743: The digital channels stop working after a...
Hmm, sounds similar to my problem. Analog input and FM seems to work
but all coax/opto input are dead ( for me there isn't a buzz).
Have you, fredrik648, solved your problem?
Anyone with ideas what to do?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
How is TV audio (from the cable box) getting into the Receiver? If digitally, you wouldn't be missing any one channel on a connection malfunction, you'd lose them all. If analog, swap the channels around to isolate the problem (and reconsider using digital).
Check the input mode on the reciever so that they are set for dual, rather than just digital or analog. It might be set for analog and your using a digital optical in cable. Also make sure DTS mode is turned off, unless your watching a DVD that is dts enabled.
I had the same problem and finally sloved it. You have to leave the input channels ( Vid1, Vid2, SVid, Cmpt, HDMI, etc ) in the In Channel List. So push the INPUT button, go to VID1, press Menu, go down to List & Labels then check In Channel list. Do this for all the inputs and then run your Channel search again. I hope this works for you. It did for me.
The reciever you have has 5.1 inputs at the backof it.The only way to get Dolby True HD and DTS HD is to run the 7.1 analog out from the bd55 to the nad. You'll have to leave the 2 rear surround open on the bd55 leaving the remaining 6 connected to the nad. The digital coax and the optical will not transmit the hd data, only the analog out will. Run a hdmi right to your HD tv for picture bypassing your amp. this will workfine and you'll have the audio you want. You,ll have to change the input settings for dvd in your amp to 5.1 to recieve the audio.
NAD Technical Bulletin T743-H2005-06 describes the problem "Unit may shut down, shortly after turn on". Reason: There is a diode on the standby board that maybe operating intermittently. Solution: Locate and identify D756 on the standby board. Change only if the diode is a 1N4148. Change from a 1N4148 to a 1N4004 or equivalent.
It is located near a transformer and some fuses.
I have had the front, left and right channels go out over time.I have fixed all of them, and each time it has turned out to be a cold solder joint.While I love NAD and will continue to purchase there equipment, this generation is plagued with poor workmanship.
To fix the channel going out, I removed the top cover.Back cover and 2nd card from the left (looking at the receiver from the back side).This card handles all of the audio processing.I have found cold solder joints all over this board which has caused channels to suddenly go quite.I have never found a bad component.Also, I have cleaned the interconnect to be backplane (board that the audio processing board connects to) in the case of the center channel going quite.
If you have poor FM reception, the first board from the left (looking at the receiver from the back side) may have a cold solder joint on the coaxial connection for the FM antenna.
I have had the T743 for about three years now. The first unit which I got from the local shop was doing exactily like your described after couple of minutes use. Well, I took is back and got a new one covered by the warranty.
Unfortunately I never got any explanation to this problem from my local shop or anywhere else, so I guess the only way is to contact your local shop.