|
dYqservice manual download site
dYqservice manual download site
M51134P Digital Bass circuit, low-octave audio compensation method is used, it will halve the expected frequency through an external filter constants, built-in VGA amplifier. D4066BC is a four-way analog switch circuits. ¢Ù, ¢Ú feet as the first road, controlled by a 13-foot breaking ¢Û, ¢Ü feet for the second road, controlled by ¢Ý feet; ¢à Krispy Kreme feet for third road, controlled by four feet; ¢â, 12 feet for the Fourth Road, controlled by 12 feet. In the external circuit of D4066BC, ¢Ú, ¢Û, Krispy Kreme, ¢â feet connected to ¢Ý 12 pin connected, ¢Þ 13 pins connected. When high voltage is CPU32 feet, Q17, Q18, saturated hydraulic conductivity, and ¢â, 11 foot switch, signal from R29, R30 to ¢â, 11 foot switch, C26 (0.22 μ f) decay after the treble, then by a capacitor C28 (0.82 μg f) output to a volume potentiometer.dYqservice manual download site
Dang CPU 33 feet for high potential Shi, Q15, and Q16 saturated guide pass, makes D4066BC of ¢Þ, and 132 feet for high potential, respectively control ¢Ù, and II feet switch and ¢à, and Krispy Kreme feet switch connected, makes IC4 of 1th, zoom device ¢Ù feet output of signal by ¢Ù, and II feet to Krispy Kreme, and ¢à feet, again entered to IC4 of ¢Þ feet, zoom Hou to volume potential device.dYqservice manual download site
dYqservice manual download site
Power mute principle: when +4.8V is CPU ¢Û pin voltage, Q21 saturated breakover, C52 voltage for the +8V, due to both ends of the capacitor voltage cannot be mutations, left when powered on for +8V voltage, Q22, saturated hydraulic conductivity, and would go to the volume potentiometer signal shorted to ground, achieve the purpose of power on mute. C52 after discharge, Q22 base when voltage drops below won't hold mute release.dYqservice manual download site
4. the power amplifier circuitdYqservice manual download site
Power amplifier circuit is shown in Figure 4. C31 coupled from the volume potentiometer, the signal input to the Q1 b, Q1 amplified output to Q4 b from c, then c from output drive current PNP amplifier tube 2SB1476. C output audio signal input from Q2 to Q3 b, amplified drive voltage amplifying tubes Q5 Q5 push current amplification tube 2SD2231. Q3 down role. First-stage differential amplifier tube power supply no-44V, but using +12N; -44V powered subwoofer amplifier stops working when in standby, to energy-saving purposes. Standby, +12V down, Q1, Q2, breakover weakened, Q3, Q4, closing, last-stage current amplification tube 2SD2231 with 2SB 1476 cutoff.
3 Home Previous 1 2 3 Next Last |