Toa AV-20D Operating Instructions Manual Download Page 4

                                                                                            

 

 

 

 

CAUTION 

Indicates a potentially hazardous situation which, if mishandled, could

 

result in moderate or minor personal injury, and/or property damage.

 

 

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. 

 

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.

 

 

To avoid electric shocks, be sure to unplug the unit's power supply cord when connecting speakers. 

 

Be  sure  to  follow  the  instructions  below  when  rack-mounting  the  unit.  Failure  to  do  so  may  cause  a  fire  or 

personal injury. 

·

 

Install  the  equipment  rack  on  a  stable,  hard  floor.  Fix  it  with  anchor  bolts  or  take  other  arrangements  to 

prevent it from falling down. 

·

 

When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to 

the unit. 

·

 

No rack-mounting screws are supplied with the unit. Separately prepare the appropriate screws for the rack.  

 

Keep  the  amplifier  over  10  cm  (3.94")  away  from 

objects that may obstruct air flow to prevent the unit's                                                                                  

   

internal temperature rise.  

 
 

 

 

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. 

 

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. internal temperature rise. 

 

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. 

 

The lighting flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user 

to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of 

sufficient magnitude to constitute a risk of electric shock to persons. 

 

 

 

 

L'appareil ne doit pas être exposé aux éclaboussures ou écoulements et tous objets remplis de liquide, tels que 

vases, ne doivent pas être sur l’appareil.

                                                                                  

Summary of Contents for AV-20D

Page 1: ...RE AND FUNCTIONS P5 9 2 Output Volume Setting P10 Front P5 10 BLOCK DIAGRAM P11 Rear P6 11 DIMENTIONAL DIAGRAM P12 6 CONNECTIONS P8 12 SPECIFICATIONS P13 6 1 Removable Terminal Plug Connection P8 13 APPENDIX P14 6 2 Input Connections P8 6 3 Speaker Connections P9 6 4 Remote Volume Connection P9 6 5 AC Power Connections P9 Thank you for purchasing TOA s Power Amplifier Please carefully follow the i...

Page 2: ...lt an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used ...

Page 3: ... close proximity to heaters and never place heavy objects including the unit itself on the power cord as doing so may result in fire or electric shock Avoid installing or mounting the unit in unstable locations such as on a rickety table or a slanted surface Doing so may result in the unit falling down and causing personal injury and or property damage The apparatus shall be connected to a mains s...

Page 4: ...ck mounting screws are supplied with the unit Separately prepare the appropriate screws for the rack Keep the amplifier over 10 cm 3 94 away from objects that may obstruct air flow to prevent the unit s internal temperature rise 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...

Page 5: ...ental operation Removable input output terminal blocks facilitate installation and maintenance Built in ALC Auto Level Compressor circuit to protect the connected speakers and internal components from the over loaded input Working in AC100V 240V 50Hz 60Hz UL2043 plenum rated construction for in the ceiling installation using attached EMT adaptor plate 5 NOMENCLATURE AND FUNCTIONS Front This figure...

Page 6: ...ed button in the breaker pops out to indicate that the breaker has tripped After turning off the power and eliminating the cause of the breaker trip press the button to reset the breaker 9 AC receptacle Connect AC cord from this inlet to AC wall outlet P S This IEC power receptacle can be removed and replaced with Flexible Conduit Adapter using EMT adaptor plate attached to the unit For UL2043 cer...

Page 7: ...als 10K Ohms unbalanced RCA jack Connect a sound source equipment such as a CD player 15 Remote volume control 10K Ohms removable terminal block 2P Use it as a remote volume control 16 Mono Stereo switch Move the switch downwards to set the channels in stereo mode move upwards to set the channels in mono mode 17 Bridge ON OFF switch Move the switch downwards to set the amplifier in two channels ou...

Page 8: ...rt the wire 1 2 Tighten the terminal screws Ensure that the wire does not break free when pulled If the wire does pull free repeat the connection procedure from the start Step 2 Insert the wired terminal plug into the corresponding terminal block in the unit s rear panel Step 3 Tighten the fixing screws Speaker output terminals only Notes Do not reverse Steps 1 and 2 Poor contact may result if for...

Page 9: ...elow Attenuating the value of the potentiometer will reduce the audio level This attenuation works for the audio signal after adjusted by its master volume control 6 5 AC Power Connections If necessary this power receptacle can be replaced with flexible conduit adapter For UL2043 certification the optional receptacle which can be directly connected AC wires with the screw terminals on the PCB is r...

Page 10: ...adjust the proper volume control or sensitivity so that the signal indicator lights intermittently Note that the sound quality is downgraded when the peak indicator remains lit For those audio source equipments which always have relative high output level such as CD players please set the input sensitivity selection switch to 10dBV position otherwise set to 20dBV position 9 2 Output Volume Setting...

Page 11: ...10 BLOCK DIAGRAM 11 ...

Page 12: ...11 DIMENSIONAL DIAGRAM 12 ...

Page 13: ...D N Less than 0 15 Line 1 10 20dB selectable 10 K Ohms transformer balanced removable terminal block Line 2 10 20dB selectable 10 K Ohms unbalanced 3 5mm stereo jack Input Line 3 10 20dB selectable 10 K Ohms unbalanced RCA jacks Output Speaker Output Removable terminal block 4P Tone Control Bass 10 dB at 100 Hz Treble 10 dB at 10 kHz Controls Master volume control Remote volume control Bass tone c...

Page 14: ...embly to AV 20D as following procedures 1 Remove the IEC power cord 2 Remove and retain the two Philips head screws that secure the AC receptacle to the back panel Fig 1 3 Remove and retain the 10 screws that secured the top cover of AV 20D to its main chassis Fig 2 4 Carefully lift the top cover up remove and retain it 5 Use a standard screwdriver to loosen the screws holding the Hot and Neutral ...

Page 15: ...15 ...

Page 16: ......

Reviews: