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POWER AMPLIFIER
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS ........................... 2
2. GENERAL DESCRIPTION ......................... 4
Front ............................................................ 4
Rear ............................................................. 5
4. RACK MOUNTING ..................................... 6
Thank you for purchasing TOA's Power Amplifier.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
OPERATING INSTRUCTIONS
5.1. AC Power Supply ................................. 6
5.2. 24 V DC Power Supply ......................... 6
(For qualified service personnel only) ......... 8
7. SPECIFICATIONS ...................................... 8
Accessories ................................................. 8
Optional product .......................................... 8
PA-3640VB
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Summary of Contents for Toa PA-3640VB
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Page 1: Table Of Contents
(For qualified service personnel only) ..8 4. RACK MOUNTING ........6 7. SPECIFICATIONS ........8 Accessories ..........8 Optional product .......... 8 Thank you for purchasing TOA's Power Amplifier. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment. -
Page 2: Safety Precautions
1. SAFETY PRECAUTIONS • Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation. • Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety. - Page 3 • Contact your TOA dealer as to the cleaning. If dust • When unpacking or moving the unit, be sure to is allowed to accumulate in the unit over a long handle it with two or more persons.
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Page 4: General Description
2. GENERAL DESCRIPTION The PA-3640VB is a rack-mount Power Amplifier having Priority input/output and Program input/output. Shorting the Priority control terminal allows the Priority input to take precedence over the Program input and the rear-mounted Priority control output to be activated. In this case, the front-mounted Priority indicator lights red to indicate the priority circuit is activated. -
Page 5: Rear
DC power supply Note unit. Refer servicing to qualified service personnel. Contact your TOA dealer. 17. Functional ground terminal (Signal ground) Hum noise may be generated when external 12. Priority control input terminal equipment is connected to the unit. Connecting... -
Page 6: Rack Mounting
5.1. AC Power Supply The PA-3640VB is a permanent connected apparatus having no power on/off switch on itself. Its power cord should be connected to the Switched AC power outlet of the Junction Panel such as model JP-0410, so that you can control the power on/off for the entire amplifier rack. -
Page 7: Speaker And Attenuator Connection
Never use both terminals simultaneously. 5.3.2. Attenuator Connection The PA-3640VB has a built-in relay activated by the Priority control input. The relay provides NC (normally closed) and NO (normally open) contacts at the Priority-activated control output terminal on the rear panel. For an emergency broadcast state when the Priority control is activated, this terminal allows 2 ways of connections depending on the type of attenuator as shown below. -
Page 8: Mute Level Adjustment
For safety, be sure to disconnect the AC power from the unit only before opening and replacing the upper case (Steps 1 and 5 below). In addition, never touch any component other than the Mute level control. PA-3640VB Step 1. Unscrew the upper case to remove it.
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