Wheelock PA-250 Manuals

P83243 C Sheet 1 of 6 273 Branchport Avenue Long Branch, N.J. 07740 (908) 222-6880 INSTALLATION INSTRUCTIONS MODEL PA-250 AND PA-500 BOOSTER AMPLIFIER GENERAL: The Series PA-250 and PA-500 Watt Booster Amplifiers are designed to be driven from a line-level preamplifier source, (i.e. Series MX-8 Mixer or the line output of any Wheelock paging amplifier). The PA-250 and 500 offers a choice of two different inputs, one low impedance balanced 600 Ohm input and one high impedance unbalanced LINE IN input. Use of the LINE IN will automatically disconnect the balanced input. The input is buffered and available at the BOOSTER OUT. The amplifier features a VOLUME control and an OUTPUT PEAK indicator for the amplifier on the front panel. On the rear panel there is a power ON/OFF switch with a switched auxiliary AC receptacle. All inputs and outputs are connected at the rear panel. Screw terminals are used for the 600 Ohm input (see Figure 2). Phono jacks are used as input and output for LINE IN and BOOSTER OUT (see Figure 2). The audio power output is connected via screw terminals (see Figure 3). The amplifier operates from 115VAC, 60Hz and has a power consumption of 350 Watts and 700 Watts respectively. There is no external fuse or circuit breaker. IN THE EVENT THE AMPLIFIER DOES NOT POWER UP, HAVE THE TROUBLE INVESTIGATED BY AN AUTHORIZED SERVICE TECHNICIAN OR RETURN UNIT TO FACTORY. NOTE: READ THESE INSTRUCTIONS CAREFULLY. FAILURE TO COMPLY WITH ANY OF THE FOLLOWING INSTRUCTIONS, CAUTIONS AND WARNINGS COULD RESULT IN RISK OF ELECTRICAL SHOCK, IMPROPER APPLICATION OR INSTALLATION. NOTE: All CAUTIONS and WARNINGS are identified by the symbol. All warnings are printed in bold capital letters. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. 1. UNPACKING: The amplifier was carefully checked before leaving the factory. Inspect shipping container and unit carefully for indication of improper handling. If the unit has been damaged, make an immediate claim to the carrier. 2. MOUNTING INSTRUCTIONS: The amplifier is provided with five mounting feet for placement on a shelf and comes equipped with a Rack Mount Kit (PA-RMK) for mounting in standard EIA 19” racks. Refer to Figure 7 for mounting instructions. CAUTION: These devices are not intended for use in hazardous locations as defined by the National Electrical Code (NEC). 3. POWER AND GROUNDING (SEE FIGURE 1): The 115VAC line cord has a three-prong plug which should be plugged into a three wire grounded electric outlet. It is very important to maintain the amplifier ground for safe and trouble-free operation. If there is no grounded electric outlet, connect a wire from the GND terminal on the OUTPUT terminal strip to a water or steam pipe. 4. POWER SWITCH AND RECEPTACLE (SEE FIGURE 1): The ON/OFF power switch located on the rear panel, controls both the internal power of the amplifier and the accessory IEC female outlet. Note: The accessory to be attached and controlled by the ON/OFF switch must not exceed 3 Amps at 115VAC. Figure 1: Power Connections Copyright 1996 Wheelock, Inc. All rights reserved.