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ICs Used:  STK412-150C – IS81LV6416-10TLT[S-RAM] – TMP92CD28AFG[USB controller] – M30624MGP-B33FPU0(US) or M30624MGP-B34FPU0(Except US)[System control] – M61537FP-RF0G(Rec-Playback AMP) – BH2210FV-E2  Click on the pictures to zoom in AUDIO POWER SPECIFICATION (US model only) POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 6-ohm loads, both channels driven, from 120 Hz – 10 kHz; rates 160 watts per channel minimum RMS power, with no more than 10 % total harmonic distortion from 250 milliwatts to rated output. Amplifier section The following are measured at US model: AC 120 V, 60 Hz Other models: AC 120, 220, 240 V, 50/60 Hz Front/Surround speaker Power Output (rated): 160 W + 160 W (at 6 Ω, 1 kHz, 1% THD) RMS output power (reference): 250 W + 250 W (per channel at 6 Ω, 1 kHz, 10% THD) USB board schematic Transformer board schematic Main board schematic Power amplifier board schematic

This little circuit can assist you to get rid of all surplus tiny ac mains adaptors from your desktop. The circuit is nothing, however a sensible dc power box directly powered by the smps of your desktop pc. Regulated, clean and guarded +12VDC is offered at the output of this unit. additionally, a USB power port is provided to re-charge transportable devices as well as cellphones and music players, etc. How will the computer power box works All you would like is to open your system box and connect an unused 4-pin drive power connector from the system smps to the current circuit. +12V (Yellow wire) from the smps is processed by a resettable electronic fuse designed around elements T1, T2 and T3 and feed to the output terminal. equally the +12V is down converted to stable +5V by fastened three pin regulator IC1. Smart dc power box circuit schematic As a result, +12V (500 -750mA max, based mostly on the electrical characteristics of T2 used) and +5V (1A max) DC provides are obtainable fo...

E) Failure to drop out 1)Coil not disconnected from supply Remedy: Check wiring of the coil circuit 2)Residual magnetism due to lack of air gap in the central is over limb of the magnet Remedy: The mechanical life of contactor. Replacement 3)Gummy substance on pole faces causing binding Remedy: Remove the foreign substance .....