Toa P-1812 Operating Instructions Manual Download Page 3

3

1. SAFETY PRECAUTIONS 

• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages

regarded as very important precautions are included.

• We also recommend you keep this instruction manual handy for future reference. 

Safety Symbol and Message Conventions 

Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards. 

WARNING

Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.

Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.

WARNING

CAUTION

When Installing the Unit

• Do not expose the unit to rain or an environment

where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock. 

• Use the unit only with the voltage specified on the

unit. Using a voltage higher than that which is
specified may result in fire or electric shock.

• Do not cut, kink, otherwise damage nor modify the

power supply cord. In addition, avoid using the
power cord in 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. 

• 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 unstable

locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down, causing personal injury and/or property
damage. 

When the Unit is in Use 

• Should the following irregularity be found during

use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest TOA dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock. 
· If you detect smoke or a strange smell coming

from the unit.

· If water or any metallic object gets into the unit 
· If the unit falls, or the unit case breaks 
· If the power supply cord is damaged (exposure of

the core, disconnection, etc.)

· If it is malfunctioning (no tone sounds.)

• To prevent a fire or electric shock, never open nor

remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
your nearest TOA dealer.

• Do not place cups, bowls, or other containers of

liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock. 

• Do not insert nor drop metallic objects or

flammable materials in the ventilation slots of the
unit's cover, as this may result in fire or electric
shock. 

Summary of Contents for P-1812

Page 1: ...ERATING INSTRUCTIONS PA AMPLIFIER P 1812 Please follow the instructions in this manual to obtain the optimum results from this unit We also recommend that you keep this manual handy for future referen...

Page 2: ...eaker Connections 6 5 2 Emergency Control Connection 6 5 3 Remote Power ON OFF Control Connection 6 5 4 Emergency Input and Control Input Terminal Connections 7 6 INSTALLATION 8 7 RACK MOUNTING 8 8 CO...

Page 3: ...n the power cord as doing so may result 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 neve...

Page 4: ...ause 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 no...

Page 5: ...9 Remote control terminal block Permits the unit s power to be remotely turned ON or OFF by way of make contacts For details refer to p 6 Emergency Control Connection and Remote Power ON OFF Control...

Page 6: ...REMOTE IN CONTROL EMER GENCY A 1803 A 1806 A 1812 With the P 1812 s power turned OFF it can be remotely turned ON from the optional A 1803 A 1806 or A 1812 PA Amplifier by making the Remote IN OUT ter...

Page 7: ...NCY P 1812 Connect this cable when requiring remote power ON OFF control While the Emergency control input terminals remain shorted the power of all the connected A 1800 series and P 1812s is turned o...

Page 8: ...w to prevent the unit s internal temperature rise 7 RACK MOUNTING To mount the unit in a standard 19 equipment rack use the optional MB 25B Rack Mounting Bracket Attach the MB 25B to the unit using th...

Page 9: ...ght Note that the sound quality is downgraded when the red indicator remains lit To prevent the accidental change of the setting of Master Volume Control remove its knob after setting it to the desire...

Page 10: ...jumper to OFF position OFF Factory preset position ON OFF ON Upper view without case Leave the modification described here to a qualified service technician only Please consult your TOA dealer This m...

Page 11: ...OWER switch 83 100 V 4 16 POWER 220 230 V AC or 240 V AC 50 60 Hz PT Fuse Fuse Fuse Output level meter Relay JP OT C C LINE OUT 0 dB 600 0 dB MASTER volume INPUT LEVEL 0 dB 10 dB REMOTE IN CONTROL EME...

Page 12: ...dB Master volume max INPUT LEVEL switch 10 dB Control Input POWER REMOTE No voltage make contact input Open voltage 24 V DC Short circuit under 1 mA M3 screw terminal 2 EMERGENCY 3 No voltage make con...

Reviews: