User manual XINDAK XA8800MNU

[. . . ] Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. Unplug this apparatus during lightning storms or when unused for a long time. [. . . ] This model offers the user quality sound reproduction and elegant styling also features excellent look. The amplifying circuitry design follows the well appraised current negative feedback structure, featuring the full symmetric and full complementary circuit. The most outstanding advantages of this circuitry are powerful drive, low distortion, rich dynamics, excellent controlling ability, reliable work and good sound. The whole amplifying circuitry can be divided into three stages: the first stage adopts quality Motorola MJE350/MJE340 geminate transistors, the second stage adopts Toshiba 2SC517/2SA1930 geminate transistors and the output stage uses three pair of Sanken 2SC3264/2SA1295 high current geminate transistors. Therefore, this amplifier is ensured of power driving current. The materials are very select, especially some audio-use-only and world famous capacitances are choicely used in the audio loop. It uses imported relay to switch the coaxial channel and balanced channel. The whole power supply system is consisted of the 350W high quality annular transformer as the core, the 50A high speed bridge rectifier and 60, 000 F Rubycon capacitance. The power supply for voltage amplifying is supplied by the filtered and rectified separate windings of the transformer, which have high speed, low noisy, low impedance and strong shielding ability. Besides, the separate design of the two windings can rapidly reduce the intermodulation disturbance and thus increase the purity of the sound. Additionally, this unit has perfect self-protection function. The core of the protect circuitry takes charge of the protect functions against output over current, over voltage and on/off surge with an indicator which will glitter in case of protect. [. . . ] Turn on the sound source. Fuse has fused Sound source turned off Signal cable is broken Check and change signal cable. Speaker no sound Speaker cable is broken Check and change speaker cable. Tune input selection button according to sound source. [. . . ]