Instruction/ maintenance manual of the product 7140 NAD
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7140 S t e r e o Re c e i v e r Date of manufacture : Jan 87 - Nov 89 Please note that this document contains the text from the original product brochure, and some technical statements may now be out .
High-curr ent output stage Electrical power is the product of voltage and cur r ent, but cur r ent flowing through the voice coil is what makes a loudspeaker cone vibrate and reproduce sound.
PRE-AMP SECTION Phono input Input impedance (R and C) 47k Ω / 100pF Input sensitivity , (1kHz, ref. rated power) 3.2mV Signal/Noise ratio (A-weighted with cartridge connected) 76dB ref. 5mV THD (20Hz - 20kHz) <0.04% RIAA response accuracy (20Hz - 20kHz) ±0.
FM TUNER SECTION Input sensitivity Mono -30dB THD+N 10.3dBf (1.8µV/300 Ω ) Mono 30dB S/N 14.2dBf (2.8µV/300 Ω ) Stereo 50dB S/N 36dBf (34µV/300 Ω ) FM NR of f 29dBf (16µV/300 Ω ) FM NR on Stereo 60dB S/N 46dBf (110µV/300 Ω ) FM NR of f 40dBf (56µV/300 Ω ) FM NR on Capture ratio (45 - 65dBf) <1.
An important point after buying a device NAD 7140 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought NAD 7140 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data NAD 7140 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, NAD 7140 you will learn all the available features of the product, as well as information on its operation. The information that you get NAD 7140 will certainly help you make a decision on the purchase.
If you already are a holder of NAD 7140, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime NAD 7140.
However, one of the most important roles played by the user manual is to help in solving problems with NAD 7140. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device NAD 7140 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
