Question about Audio Players & Recorders
Hello. I'm a tech with a tuner problem...I have a NAD 7140 receiver which, when powered up, loses the radio signal after just a few minutes. Next to the tuner module there are 3 transistors. I've traced the signal fade-out to there with a scope. However, I need a schematic or, preferably, the service manual to continue the hunt. Using a can of chiller comes to mind but that's risky due to condensation and other phenomenon that can occur--especially with a unit as old as this one is. (abt 25 years) I have to wait a while for the unit to cool back down so I can quickly start troubleshooting again before the loss repeats itself. Any ideas where I can obtain a service manual? Heh, I don't think an NAD service center is going to be gracious enough to sell me one of theirs (food out of their mouths and all that...). Any help will be greatly appreciated! Thanks in advance, ----Rick
The main problem with the 7140 is that there are at least 3 versions that I am aware of. The varient is based upon the serial number. Can you post that here. I will look up the info for you. I have access to some NAD stuff. Post the part designations as well (Qxx) and I'll at least get you the exact part numbers etc.
Posted on Mar 23, 2008
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Posted on Jan 02, 2017
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