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An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.

When Installing the Unit

     Never   plug  in   nor remove the power  supply   plug
    with  wet  hands,  as  doing  so  may cause electric
    shock.

     When unplugging   the  power   supply cord, be sure
     to grasp the   power  supply   plug; never  pull on the
    cord  itself.  Operating   the  unit   with  a  damaged
    power  supply  cord  may  cause  a  fire  or  electric 
    shock.

     When moving the unit, be sure  to remove its power 
     supply cord   from the  wall   outlet.  Moving   the unit
     with the   power  cord   connected  to   the outlet may
     cause damage to the power cord,  resulting in fire or 
     electric shock. When   removing the power cord,  be
     sure to hold its plug to  pull.

  Do not block the ventilation slots in the unit's cover.
  Doing so may cause heat to build up inside the unit 
  and result in fire.

  Avoid installing the unit in humid or dusty locations,
  in locations exposed to the direct sunlight, near the 
  heaters, or in locations generating   sooty smoke or
  steam  as  doing  otherwise  may  result  in  fire  or 
  electric shock.

When the Unit is in Use

     Do not place heavy objects on the unit  as  this   may
    cause   it  to  fall  or  break   which   may   result   in 
    personal   injury    and/or    property    damage.   In
    addition,  the  object  itself  may  fall  off  and  cause
    injury  and/or  damage.

    Make  sure   that   the  volume   control   is   set   to
    minimum  position   before  power  is  switched   on.
     Loud noise produced at high volume when power  is 
    switched  on  can  impair  hearing.

     Do not operate   the  unit   for an  extended   period of 
     time with   the sound distorting. This  is   an indication
     of   a  malfunction,   which  in   turn  can cause heat to
     generate and result in a fire.

     Contact your dealer as   to the  cleaning. If   dust is
    allowed  to accumulate  in  the  unit  over  a  long 
     period of   time, a  fire   or damage  to   the  unit may 
    result.

  If dust accumulates on the power supply  plug or in
  the  wall  AC  outlet,  a  fire  may  result.  Clean  it 
  periodically. In addition, insert the plug in the wall 
  outlet securely.

  Switch off   the  power, and unplug the power   supply
  plug   from the  AC outlet   for  safety   purposes when 
  cleaning   or  leaving the unit unused for   10  days or 
  more. Doing otherwise   may cause a fire  or   electric 
  shock.

 SAFETY PRECAUTIONS

4

Summary of Contents for T-8S02

Page 1: ...yfor future reference MIXER PRE AMPLIFIER OPERATION MANUAL OPERATION MANUAL PUBLIC ADDRESS SYSTEM T 8S02 1 2 3 4 5 6 7 8 AUX M A M A M A M A M A M A M A M A BUS BUS BUS BUS BUS BUS BUS BUS CUT CUT CUT CUT CUT CUT CUT CUT LOW LOW LOW LOW LOW LOW LOW LOW T 8S02 HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF 18 12 6 3 0 3 6 12 20 20 100 0 ...

Page 2: ...3 3 Helpful hints 8 4 INSTALLATION 9 5 OPERATION 11 5 1 Troubleshooting Gain Structure 12 5 2 Recommended Input Wiring Methods 13 5 3 Fine Tuning 14 5 4 Compressor Limiter 15 5 5 Special Features Activation 16 5 6 Jumper Options 17 6 TROUBLESHOOTING TIPS 18 7 GLOSSARY 19 8 TECHNICAL INFORMATION 20 9 BLOCK DIAGRAM 21 2 ...

Page 3: ...esult in fire or electric shock Be sure to replace the unit s terminal cover after connection completion Because high voltage is applied to the speaker terminals never touch these terminals to avoid electric shock Be sure to ground to the safety ground earth terminal to avoid electric shock Never ground to a gas pipe as a catastrophic disaster may result Avoid installing or mounting the unit in un...

Page 4: ...ing sooty smoke or steam as doing otherwise may result in fire or electric shock When the Unit is in Use Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure that the volume control is set to minimum position before power is switched...

Page 5: ...lector switch of line and Mic 8 each input can gain control 9 each input is with low cut filter 10 phantom power offer power for condenser Mic 11 each input seperately control knob input PWL 12 main output spare output seperately control knob 13 airproof potentiometer to low noise and long life 14 external power source 15 main output with compressor 16 compressor with by pass switch 17 compressor ...

Page 6: ...the signal level of either the main or auxiliary bus and to indicate either the average or peak signal See page 18 for details 7 Threshold Control Screw pot adjustment sets the signal level 20 to 20 VU factory setting is 0 VU at which the Compressor Limiter becomes active 8 Ratio Control Screw pot adjustment sets the amount of compression 0 100 factory setting is 100 of the signal above the thresh...

Page 7: ...ary Bus Output Balanced line level connection to auxiliary output bus 5 Main Output Microphone Line Switch Selects main output to be either MIC 50dB or line 0dB level 6 Main Bus Output Balanced connection to main output bus 7 Auxiliary Input Balanced buffered uncontrolled line level terminals for additional ninth input connection directly to the summing buses selected by internal jumpers The facto...

Page 8: ... frequency devices and other electromagnetic field sources such as Fluorescent lights Electrical motors SCR dimmers AC power lines etc Note Always use 2 conductor shielded cable to reduce EMI or RF interference to the Line MIC inputs Keep the mixer and other equipment clean and free of dust by wiping occasionally with a soft damp cloth Protect the mixer from electrical damage by disconnecting it f...

Page 9: ...nd Auxiliary 3 to zero 1 AUX M A M A BUS BUS CUT LOW HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF 18 12 6 3 0 3 6 12 20 20 100 0 1 2 3 Turn amplifier s volume controls to the 7 o clock position B Connect Inputs Connect lead into desired pluggable terminal strip 6 on rear panel Press Input Pad Microphone Line Switch 5 to appropriate position in for line input or out for MIC input Note that the...

Page 10: ...AC power outlet and to the AC Power Jack 4 located on far left side of rear panel E Power up mixer GND 17VCT AC 4 Press Power Switch 8 to in position Power Indicator LED 7 will be lit if mixer is powered Set Main Output Volume Control Knob 5 to 2 o clock If auxiliary output is desired also set Auxiliary Output Volume Control Knob 6 to 2 o clock AUX HEADPHONE POWER MAIN LIMIT THRESHOLD RATIO ON OFF...

Page 11: ... Main Output Volume Control Knob 3 on the front panel controls the mixer s final amplifier stage to the master output This control should optimally operate between the 9 and 2 o clock positions when gain structure is correct With all channels operating the main output meter should show a signal output range between 0 and 6VU Adjust the main output control accordingly If the output occasionally pea...

Page 12: ...de adequate volume the input gain setting is too low Turn the volume control knob to the 1 o clock position and increase the input gain by turning the input gain trim control clockwise until clipping occurs or VU meter is over 0 VU Then adjust the gain to a setting just below the clipping level If channel volume is too high If a channel is not clipping but must be set below the 9 o clock position ...

Page 13: ...hown below This method can solve certain ground loop problems It has 6dB gain and good noise and ground loop rejection Unbalanced Source to Balanced Input Method 1 For an unbalanced source device the drawing below shows the best wiring method Because of the design of the mixer this wiring provides a slight 6 dB boost and moderate noise and ground loop rejection Unbalanced Source to Balanced Input ...

Page 14: ...rimarily with mic level input It is particularly effective when handheld mics are used M A BUS CUT LOW 1 Phantom Power If a condenser microphone s is not independently powered press Phantom Power Switch 2 to the on position ON OFF PHANTOM POWER GND 17VCT AC 1 The phantom power switch will power condenser capacitor Mics through the Mic cable Depressing the button simultaneously applies phantom powe...

Page 15: ...ets what signal level will activate the Compressor Limiter It has a range of 20 to 20 dB The Ratio Control 4 is a screw potentiometer that sets the compression ratio that will be applied when the signal exceeds the threshold It has a range from 0 to 100 ACompressor becomes a Limiter when the compression ratio is 10 1 or greater The factory setting for the threshold is 0 VU 4 dB but this is variabl...

Page 16: ...rrect placement of internal jumpers or varying the settings of an internal potentiometer Note All the internal components jumpers and potentiometers to which adjustments are needed for built in features are highlighted within dashed areas in the drawing below Warning Adjustments made to any other internal components may void the warranty 16 5 5 Special Features Activation OPERATION ...

Page 17: ...This is the factory default Note The meter will operate only when a jumper is in one of these two positions Bus Routing Options AUX In Jumpers JP4 These jumpers determine the destination of the Auxiliary Input The choices are MAIN installed Auxiliary Input is routed to Main Output AUX installed Auxiliary Input is routed to Auxiliary Output MAIN and AUX both installed Auxiliary Input is routed to b...

Page 18: ...e at the 7 o clock position Make sure that all unused input channels have the MIC Line switch in the Line position Make sure the MIC Line switch is in the correct position for both the inputs and the main output Hum MIC lines can easily cause hum Make sure to locate them away from vibration and magnetic field sources motors power supplies and lines and data lines Check MIC lines especially the shi...

Page 19: ...ground pathways exist between two or more devices and which can cause hum in the audio signal Jumper Ashort length of conductor used to connect pins electrically Limiter Adevice that severely at rates greater than 10 1 restricts the upper dynamic range of a signal by regulating the rate of increase of an input signals amplitude so that it will not exceed a predetermined threshold Line Microphone L...

Page 20: ...mum Level input trim pot max gain 70 dB line pad off 20 dB line pad on Maximum Level input trim pot min gain plus 20 dB headroom 30 dB line pad off 20 dB line pad on AUXILIARY INPUT Input Impedance 20k ohm balanced Nominal Input Level 0 dB OUTPUTS Output Impedance 220 ohm unbalanced 440 ohm balanced Nominal Load Impedance 600 ohm Nominal Level 4 dB RMS Maximum Level 26 dB RMS Balanced Main Output ...

Page 21: ...9 BLOCK DIAGRAM 21 JP3 JP2 JP1 JP4 BLOCK ...

Page 22: ...PUBLIC ADDRESS SYSTEM VersionV0 1 ...

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