User manual TECHNICS SU-V5 schematics

[. . . ] Keep the unit away from locations where it is likely to be exposed to high temperatures or humidity -- such as near radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumulation or vibration which could cause mechanical damage. Ventilation Allow a distance of 10 cm between the unit and the wall so that heat generated from the unit will be released effectively. If you mount the unit in an audio rack, keep a space of 10 cm on the top panel, and a space of 1 cm to the side panel. [. . . ] Always plug and unplug cables -- including the AC cord -- by gripping the connector, not the cord. Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make sure that the AC mains supply can deliver more than enough current to handle all equipment used in your system. Contents Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPEAKER IMPEDANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Caution for Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Mounting in an EIA standard rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Mounting five or more amps, or when (even with four or fewer units) the back of the rack cannot be left open . . . . . . . . . . 6 Portable Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The minimum impedance for the connected speaker system is specified in "Speaker Impedance" on page 4. If hum or noise occurs, ground (earth) the unit via this jack, or try connecting it to the chassis of the mixer or preamp, etc. 3 s Modes: STEREO/PARALLEL/BRIDGE STEREO mode In this mode, channels A and B operate independently (as a conventional stereo amp). The CHANNEL A input signal will be output from the CHANNEL A output terminals, and the CHANNEL B input signal will be output from the CHANNEL B output terminals. PARALLEL mode In this mode, the CHANNEL A input signal will be output from the output terminals of both channels A and B. volumes can be adjusted BRIDGE mode In this mode, the CHANNEL A input signal will be output from the BRIDGE output terminals. In this case, use the front panel (channel) A volume control to adjust the volume. s SPEAKER IMPEDANCE In STEREO and PARALLEL modes, the minimum load (=speaker) impedance is 4. Make sure that the impedance does not fall below this specified impedance. STEREO mode connections CHANNEL B BRIDGE BRIDGE mode connections CHANNEL A BRIDGE STEREO SPEAKERS CHANNEL B BRIDGE SPEAKERS CHANNEL A BRIDGE STEREO Set to STEREO Set to BRIDGE STEREO PARALLEL MAX. OUTPUT 900W/8 (BRIDGE) ­ + + ­ ­ + 4 min. 4 min. 8 min. Speaker System Speaker System PARALLEL mode connections CHANNEL B BRIDGE SPEAKERS CHANNEL A BRIDGE STEREO Set to PARALLEL STEREO PARALLEL MAX. OUTPUT 900W/8 (BRIDGE) ­ + + ­ 4 min. 4 min. Speaker System 4 Caution for Speaker Connection 1. Remove the cover attachment screw(s) and remove the protective cover from the speaker terminals. [. . . ] 15 mm of insulation from the ends of the speaker cables, bind the bare ends of the speaker wires in the corresponding speaker terminals and tighten the terminals to securely clamp the wires. Refer to page 3 for speaker porality. Power amplifier _+ Fuse Speaker system + _ 15mm* Use the following formula to determine the fuse capacity according to the speaker's input capacity. Po = I R I = Po/R 2 * Shown actual size. At this time make sure that the bare ends of the speaker cables do not extend from the terminals in such a way that they touch the chassis. P0 [W] : Speaker's continuous input capacity (noise or RMS) R [] : Speaker's nominal impedance I [A] : Required fuse capacity ex. ) Speaker's continuous input capacity : 100 W Speaker's impedance : 8 I = 100/8 In this example, the required fuse capacity is calculated as 3. 5 [A]. · Speaker cable If you use a long speaker cable, use as thick a cable as possible to prevent deterioration of the damping factor or power loss inside the cable. Wire should not touch the chassis. 4. Reattach the protective cover over the speaker terminals. 5 Rack Mounting s Mounting in an EIA standard rack If multiple high-power amp units are mounted in a rack with poor ventilation, the heat from the amps will cause the interior of the amp to become very hot, causing the performance of the amps to be impaired. [. . . ]