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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 component, the model
number of the unit from which it was removed.

This warranty is in lieu of all other agreements arid warranties, general or special,
expressed or implied, and no representative or person is authorized to assume for us
any other liability in connection with the sale or use of our products.

Service Policy

The entire Rauland-Borg organization is interested in the proper maintenance of
your equipment for as long as you own it. Our national network of Rauland-Borg
distributors is at the service of all purchasers of our products.

Should you have a problem with your equipment, or require any advice or
assistance, contact your local Rauland-Borg distributor. If you are not able to locate
a local Rauland-Borg distributor, the information or action that you want can be
obtained by writing to our Sales Engineering Department, at the address shown
above.

No end-user replaceable components are contained within this equipment. Refer
servicing to your local Rauland-Borg distributor.

Important:

Any attempt at self-service of this equipment may result in exposure to electrical
shock, or in extensive damage to the equipment and possible voiding of the
equipment warranty.

Summary of Contents for DAX60

Page 1: ...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...

Page 2: ...his document does not express license or imply any rights to use sell design or manufacture this information No reproduction publication or disclosure of this information in whole or in part shall be...

Page 3: ...ter Tap Operation 8 Auxiliary DC Power Supply 8 POWER CONNECTION 9 Converting the Amplifiers to 240 VAC 9 SETTING THE INPUT LEVEL CONTROL 9 REPLACING THE FUSE 9 INITIAL TROUBLESHOOTING 10 SERVICE INFO...

Page 4: ...t Their outputs can operate with a split center tap with Rauland s Telecenter 5000 and Responder 3000 systems The amplifiers are listed by Underwriters Laboratories The DAX amplifiers offer helpful po...

Page 5: ...tly to you with the carrier The following parts are included with the amplifier Quantity Part Part Number 4 Rack mounting screws for tapped holes 10 32 x hex head SEMS unslotted machine WA202 4 Rack m...

Page 6: ...ack s holes are untapped select the 10 thread forming screws WA102 Push the 10 U nuts their flat side facing outward onto the proper holes in the rack you may have to leave the U nuts off if the holes...

Page 7: ...ith a factory installed link for most applications for applications with the link removed see Split Center Tap Operation below Figure 1 The output impedances are as follows DAX60 70 7V 83 3 ohms 25V 1...

Page 8: ...The amplifier output transformer can be configured for split center tap operation with symmetrical output voltages on both sides of the center tap This is intended for special applications with Raulan...

Page 9: ...switch to the 240V side Re secure the front cover Replace the fuse with a fast blow 240 volt fuse with half the current rating of the supplied fuse the new value would be 1 25 Amps for the DAX6O 2 5 A...

Page 10: ...he power cord is plugged in to an operating outlet Examine the input and output lines for 1 obvious shorts among themselves and between them and the chassis or surrounding equipment and or 2 broken co...

Page 11: ...DC Voltages DC voltages are printed in rectangular boxes at various points on the schematic When measuring these voltages on the amplifier use a DC meter with a resistance of 1 megohm per volt and pro...

Page 12: ...a 120 VAC 60 Hz source Turn the input level control fully clockwise for maximum gain Step 4 Connect the test leads across the 25 V or 70 7 V outputs Slowly increase the output from the 1 KHz signal s...

Page 13: ...a power transistor Q507 Q508 on the DAX6O Q501 Q504 on the DAX12O obtain an appropriate Silpad insulator If a mica insulator is used instead coat both sides of it with silicone grease Dow Corning DC4...

Page 14: ...eamplifier gain It is also a common base inverter for the feedback entering its emitter Power Amplifier Circuits Transistor Q2 is a high voltage gain amplifier that drives Transistors Q3 and Q4 The la...

Page 15: ...cross the audio output the following sequence of events will occur 1 the DC voltage across Resistors R29 and R32 will drop 2 this drop will drive Transistors Q4 and Q7 into conduction 3 the output of...

Page 16: ...PO 215 Watts 385 Watts AC Convenience Outlets 720 watts maximum Operating Temperature 0 0 F to 130 0 F 17 8 0 0 C to 54 4 0 C Line Protection Fast blow fuse 2 5A DAX6O 5A DAX12O 28 VDC Protection 1 6...

Page 17: ...fective in materials and workmanship The obligation of Rauland Borg Corporation is limited to the above and does not include either the cost or the furnishing of any labor in connection with the repai...

Page 18: ...organization is interested in the proper maintenance of your equipment for as long as you own it Our national network of Rauland Borg distributors is at the service of all purchasers of our products S...

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