User manual ZECK DAISY DS2 SERVICE MANUAL

[. . . ] All mixer channels have identical controls, the difference between the two channel groups lies within their input routings. When using a monaural channel one can use the XLR microphone input or the line input jack. the stereo insert jack acts as a separate serial effects loop for each channel. When in use, the tip of the stereo jack will carry the send signal from the mixer while the ring expects the returning signal from the external device. [. . . ] Simultaneously the monitor signals and controls from the channels are disconnected. A 3-band equalizer has been added to the monitor section for a more versatile control, as the acoustical circumstances on stages mostly differ from the audience hall. Also, feedback problems that inevitabely occur from a certain sound level on, can be held under control by means of a monitor tone-control. Each of them can be activated by the pushbutton above the effect faders. When the effect is on, the green LED above the effect fader is lit and the effectdisplay shows its number continuously. Turning an effect off results in flashing of the program number display and the green LED becomes dark. The overall volume of each effect is adjustable by the corresponding fader and the `Eff to Mon' rotary knobs allow to blend the effects into the monitor mix. The jack `Effects Footswitch on/off' can be connected with a footswitch allowing to turn both effects on and off simultaneously. Only an effect that is activated by means of its pushbutton, however, can be controlled via this footswitch. a proper setting of the effect-send controls on the channels is crucial for a noise-free effect operation. The same rules that go with the channel gain settings apply here as well, there is a `range' and `clip' control for each effect. 16 are equipped with a switchable 40V phantom-power supply that can be activated by a switch on the rear next to the mains power switch. The built-in phantom power supply allows to operate up to 4 high-quality condenser microphones with the PD, but also dynamic microphones can be operated safely with the phantom power activated as the design of the microphone inputs allows no DC current to flow into the microphone coils through the signal path. Speaker left and right Each speaker output is capable of driving a minimum speaker load of 4 ohms. The jacks and XLR sockets on each channel are wired parallel. On the XLR outputs pin 3 carries the hot signal and pin 1 is ground, pin 3 is not used and has no connection. Care should be taken not to connect impedances of less than 4 ohms to each output, as this might lead to overheating of the output amplifiers, causing the thermal protection to become activated. As a common example, two 8 ohm cabinets per channel wired parallel or one 4 ohm cabinet per channel are safe. Cooling fan For increased protection against overheating of the power stages a cooling fan has been built inside the mixers housing. To operate safely, the ventilation slots need some clearance to get rid of the air and should not be covered. Silent operation is achieved by a two-stage fan speed control that runs slow at lower temperatures. When the mixer is being operatied at full power for a prolonged time the fan is switched to high speed automatically. [. . . ] Most of the time, however, you will wish to calculate the other way round to find out which delay time has to be chosen for a given tempo. The following formula will help you to solve this problem: Delay time = 30 000 bpm Following this formula, a given tempo of 130 bpm leads to a delay time of 230ms which can be obtained from the PD 12/16 program number 75. Also, program 73 with half of the delay time (110/125ms) could be used, albeit sounding slightly more hectical because of the faster repeats. The next division of 60ms would be almost too short to hear and thus make no musical sense. [. . . ]