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manual abstract
Applications 10 SECTION 8 Maintenance 12 SECTION 9 Block Diagram 13 SECTION 10 Specifications 14 SECTION 11 Bibliography 14 Safety Instructions WARNING: To avoid possible electric shock hazard, do not expose this appliance to rain or moisture. There are no user-serviceable parts inside. Refer servicing to qualified service personnel. HOUSEHOLD USE ONLY 1 SECTION 1 FEATURE DESCRIPTIONS 1. INPUT LEVEL TRIM CONTROL [TRIM] When the Input Selector is set to INPUT, the preamplifier gain can be continuously controlled from 10dB through 50dB. At full* CW of the knob, the gain is 50dB which matches a —60dBV (1mV) mic input level at the XLR jack or the phone jack of the rear panel. At full CCW of the knob, the gain is 10dB which matches a —20dBV (0.1 V) level from an electronic musical instrument and signal processor. When the Input Selector is set to TAPE, tape input signals from the TAPE IN phono jack of the patch panel cannot be controlled by this trim control. 2. INPUT SELECTOR [INPUT LINE/MIC, OFF, TAPE] A 3-position switch for selecting signals applied to the input jacks of each channel. The center, OFF position, in a convenient way to mute the input signal. *LINE/MIC: In this position, signals from mic level through line level applied to the rear panel INPUT XLR or phone jack feed the preamplifier and are applied to the input fader. *OFF: Signals to the input fader are bypassed in this position. *TAPE: The recorder/reproducer output bypasses the preamplifier and is applied to the input fader in this position of the switch. Not only can this input position be used to mixdown a multitrack recorder output, but it can also be used to receive the output from an external signal processor. 3. AUX 1 INPUT LEVEL CONTROL [AUX 1] This control feeds the input channels’ post-fader post-equalizer signals to a summing amplifier that mixes the AUX 1 signals of all eight input channels for the AUX 1 jack. This mono mix may be used to feed external signal processing equipment. 4. INPUT SELECTOR FOR AUX 2 OUTPUT [AUX 2] Input signals to be sent to the AUX 2 buss out are selected by this 3 position switch. *PRE: In this position, the input signal is pre-fader and preequalizer. *POST: In this position, the input signal is postfaderand postequalizer. *TAPE: The output of the recorder is the input signal at this position. 5. GAIN POT FOR AUX 2 BUSS OUT [GAIN] Gain pot for adjusting the level of the signal selected by switch 4), above. 6. PAN POT FOR AUX 2 BUSS OUT [PAN] A 2-channel PAN pot. With the 12 o’clock knob position as center, CCW rotation will increase the left channel level of the 2-channel buss out and decrease the right channel level at the same time (vice-versa for CW rotation). 7. 4-CHANNEL BUSS OUT SELECTOR [ASSIGN] In combination with the PAN pot located directly under this selector, it assigns the input signal to the 4-channel buss out. *1 -2: In this selector position, the PAN pot can control only the signals between CHAN 1 and CHAN 2 of the , 4-channel buss out. *OFF: In this position, signals from the input section to the 4-channel buss out are switched off. For example, if you were mixing the 4-channel buss out with the output of an echo or reverberation unit by using the 4-channel buss input, and you wanted to monitor echo or reverberation return only, turn this switch OFF. *3-4: In this selector position, the PAN pot can control only the signals between CHAN 3 and CHAN 4 of the 4-channel buss out. 8. PAN POT FOR 4-CHANNEL BUSS OUT [PAN] The signals selected by the 4-channel buss out selector of 7), above, can be pan controlled by this pot for CHAN 1 only, CHAN 1 and 2, or CHAN 2 only (CHAN 3 only, CHAN 3 and 4, or CHAN 4 only). The 12 o’clock position of the PAN pot is center. If it is rotated CCW, the signal applied to CHAN 1 (or CHAN 3) increases and that to CHAN 2 (or CHAN 4) decreases (vice-versa for CW rotation). 9. PARAMETRIC EQUALIZER [EQ] A 2-band parametric equalizer for 60Hz ~ 1kHz and 400Hz ~ 6kHz, and a shelving type equalizer for 10kHz. Boost and cut levels are ±15dB (max). 10. INPUT SOLO BUTTON [SOLO] When the SOLO button of any channel is depressed, the headphone output and monitor output normally present changes to post fader and equalizer input. The SOLO buttons are lock type switches. The SOLO functions are for MON OUT and PHONE OUT and do not affect the 4-channel buss out. 11. OVERLOAD/SOLO INDICATOR Indicates the input solo mode when the SOLO button is depressed or when this button is released, overload at the preamplifier output. 12. INPUT FADER The optimum level, relative to noise and distortion, is obtained when the input fader knob is set at OdB. Therefore, it is advisable to first set the input fader at this point and then set the overall level by the input trim control. 13. 4-CHANNEL BUSS OUT SOLO BUTTON [SOLO] The 4-channel buss out signals for each channel can be monitored individually via the pre-fader. Using the same logic as ...