|Pioneer SX-3900 Receiver|
|Category:||Audio, Video, TV, Multimedia|
|Description||FM Quartz Lock Stereo Receiver|
DC-Configured Power Amplifier Using a Won-Switching Amplifier System Featured in the power amplifier section is a NonSwitching Amplifier system. This is an amplifier with a new type of output stage which controls the output transistor bias at a high speed in accordance with the level of the output signals (with the high-speed bias servo circuit) in order to prevent the output transistors from being set to the cut-off mode. This system ends transistor switching distortion and helps eliminate higher harmonic distortion. Its efficiency is on a par with that of a class B amplifier and it displays the same high level of quality as a class A amplifier. As a result, it delivers a Continuous Power Output of 120 watts*per channel, min., at 8ohms from 20Hertz to 20,000 Hertz with no more than 0.005% total harmonic distortion. Another feature is the skived heat sink, with a highly efficient heat dissipation effect and a light weight, which has been given a chimney construction. Even when the receiver is being run continuously under full power conditions, this heat sink keeps the temperature rise down and provides high quality and high power listening. Quartz-locked FM Tuner for Accurate and Stable Reception The front end employs a 4-gang variable capacitor and dual-gate MOS FET in order to yield a high level of sensitivity and effective interference rejection. Featured in the intermediate frequency stage is three dual element ceramic filters with an outstanding group delay response and a differential amplifier 1C between the stages. This configuration helps provide an excellent selectivity and distortion. The quartz lock system adopts a crystal detector using a quartz crystal as the reference element, and when part of the intermediate frequency signal is passed through this detector, the deviation in the oscillation frequency of the local oscillator caused by shifts in the temperature or humidity is detected and this deviation in the frequency is offset. This means that whatever the frequency, the tuner is fully locked to the signal of the broadcasting station and that stable reception is assured. The MPX section employs a double chopper type of demodulator to yield a high signal-to-noise ratio and a low distortion as well as a wide dynamic range. This means that a high separation response is produced even with overmodulation. Another attraction is the adoption of a full auto pilot canceller circuit which tracks the pilot signal level and helps improve the high-range frequency response. Fluorescent Display Tubes for Power Meter and Frequency Indicator Featured for the power meter is a fluorescent display tube using the latest digital technology, a logarithmic compression circuit and a peak hold circuit. This combination allows a power output level display from 0.001 watts up to 120 watts without range selection on a bar graph display. In addition to the conventional dial scale, there is also a reception frequency display based on a fluorescent display tube. This indicates the frequency of the broadcasting station in five digits so that it is easy to tune in a station quickly. The tuning meter and signal meter also use new indicators with fluorescent display tubes. Preamplifier Guaranteeing High-fidelity Sound Reproduction The tone amplifier which employs low-noise, low- distortion ICs assures a low distortion of 0.005% (from 20Hz to 20,000Hz, 10V output). The equalizer amplifier also employs low-noise transistors and also high-precision capacitors and resistors to deliver top-notch characteristics such as an RIAA deviation of ±0.2dB over 20 to 20,000Hz, a signal-to-noise ratio of 86dB and a maximum allowable input of 300mV. Full Complement of Accessory Functions • Self-illuminating switches: The function selector and the speaker switches light up when depressed and so exactly what switches have been depressed can be taken in at a glance. • Brightness selector: This selector allows the brightness of the fluorescent display tubes to be adjusted in line with the brightness of the listening room. • AM STEREO OUT jack: Connect your stereo adaptor to this jack when listening to AM stereo broadcasts.
These manuals are available for the above equipment:
|Pioneer -- SX-3900 -- User Manual|
|Manual Type||User Manual|
|Size||6.46 Mbytes (6778791 Bytes)|
|Quality||Electronic document, no scan, very well readable.|
|Upload date||27 September 2015|
|Downloads||181 since 27 September 2015|
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