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- Installation And Service
Rauland DAX120 Installation And Service
Summary of DAX120
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Installation and service ki-1480b dax60 60-watt power amplifier dax120 120-watt power amplifier rauland-borg corporation issued: 07/08/98 page 1 of 18.
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Copyright 1998 by rauland-borg corporation, all rights reserved. This document contains user’s information on technology that is proprietary to rauland-borg corporation. Permitted transmittal, receipt, or possession of this document does not express license or imply any rights to use, sell, design o...
Page 3: Table of Contents
Table of contents general information .............................................................................................................................................. 4 d escription ...........................................................................................................
Page 4: General Information
Nki1480b dax60 and dax120 amplifiers—installation page 4 of 18 (jul-98) general information description the rauland dax series amplifiers are designed for use with rauland's institutional program and communication systems. They offer high-quality sound and dependability. They can be driven to their ...
Page 5: Installation
Nki1480b dax60 and dax120 amplifiers—installation page 5 of 18 (jul-98) drawings, diagrams, and other graphics this document includes the following drawings, diagrams, and/or supplemental graphics: 9 transistor replacement drawing—exploded (il0253) packing list/unpacking procedure although the ampli...
Page 6: Rack-Mounting
Nki1480b dax60 and dax120 amplifiers—installation page 6 of 18 (jul-98) and to allow easier access for servicing. Allowing an inch of space behind the amplifier for connections, the rack requires a total depth of seven inches. A cooling fan is recommended when the rack is enclosed and any of the fol...
Page 7: Input Connections
Nki1480b dax60 and dax120 amplifiers—installation page 7 of 18 (jul-98) input connections the input is unbalanced. The input screw terminals are labeled "com" (-) and "input" (+), respectively. The terminal strip is located on the lower right corner, as viewed from the rear of the chassis. The signa...
Page 8: Grounding The Center Tap
Nki1480b dax60 and dax120 amplifiers—installation page 8 of 18 (jul-98) amplifier, the maximum speaker load should be approximately 50 watts; for a 120- watt amplifier, the maximum speaker load should be approximately 100 watts. For unbalanced operation, place a jumper between one of the speaker ter...
Page 9: Power Connection
Nki1480b dax60 and dax120 amplifiers—installation page 9 of 18 (jul-98) power source, such as rauland's model 6430 pink-noise source and model 6431 1/3-octave equalizer. Do not mix floating and grounded accessories. Power connection plug the power cord into a 120-v, 60-hz, three-wire grounded outlet...
Page 10: Initial Troubleshooting
Nki1480b dax60 and dax120 amplifiers—installation page 10 of 18 (jul-98) fuse. Use a fast-blow fuse: 2.5 amps for the dax6o, 5 amps for the dax12o (but only half of these values if the amplifier is operating from a 240-vac line). The fuse holder is on the rear of the amplifier, below the power trans...
Page 11: Service Information
Nki1480b dax60 and dax120 amplifiers—installation page 11 of 18 (jul-98) service information do not attempt to service your amplifiers unless you are an authorized technician. Important: t he information that follows is intended for qualified service technicians only locating the test points wheneve...
Page 12: Measuring Ac Voltages
Nki1480b dax60 and dax120 amplifiers—installation page 12 of 18 (jul-98) on the dax12o: connect the meter's negative lead to the amplifier common at connector "j1-13." as you locate each dc voltage on the schematic, note the number of the nearest "j" terminal in that leg of the circuit and, if possi...
Page 13
Nki1480b dax60 and dax120 amplifiers—installation page 13 of 18 (jul-98) removing and replacing transistors transistors are inherently long-lived devices that normally should not need replacement. If, however, systematic troubleshooting indicates a problem, observe these precautions when removing an...
Page 14: Testing Transistors
Nki1480b dax60 and dax120 amplifiers—installation page 14 of 18 (jul-98) step 3. After obtaining a high-resistance reading (at least 100 kilohms) between each transistor case and the heat sink, re-establish the connection between the negative side of c503 and the standard connector (daxi2o only). Te...
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Nki1480b dax60 and dax120 amplifiers—installation page 15 of 18 (jul-98) input and preamplifier circuits: resistor r1 and capacitors cl and c507 filter radio frequency interference (rfi). Rv1 is the input level control (potentiometer), which controls the signal that is applied to the preamplifier ci...
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Nki1480b dax60 and dax120 amplifiers—installation page 16 of 18 (jul-98) full rpo 175 watts 345 watts dax60 dax120 no signal 50 watts 50 watts 1/3 rpo 145 watts 250 watts ac power consumption (28 vdc auxiliary output fully loaded) full rpo 215 watts 385 watts ac convenience outlets 720 watts maximum...
Page 17: Appendix A: Limited
Nki1480b dax60 and dax120 amplifiers—installation page 17 of 18 (jul-98) appendix a: limited warranty/service policy limited warranty this warranty supersedes any warranty or guarantee that may appear on any printed material packed with any product or any warranty or guarantee previously issued by r...
Page 18: Service Policy
Nki1480b dax60 and dax120 amplifiers—installation page 18 of 18 (jul-98) all material returned to rauland-borg corporation under this warranty must be accompanied with information concerning the nature of the defect, the original date of shipment, original invoice number, and, if a defective compone...