VTL IT-85 Owner's Manual
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VTL IT-85 Owner's Manual

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IT-85 Integrated amplifier
Owner' s Manual

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  • Page 1 IT-85 Integrated amplifier Owner’ s Manual...
  • Page 2 VTL. Version History: Version 3.2 April 23, 2008 Part Number: 0020-001 Copyright © 2008 by VTL Amplifiers Inc. All rights reserved. 4774 Murrieta Street, Suite 10 Chino, CA 91710, USA Phone 909.627.5944 • Fax 909.627.6988 Email: mail@vtl.com • http://www.vtl.com/...

  • Page 4: Table Of Contents

    Check for tube placement.....................6 IT-85 Front Panel.........................7 The IT-85 Rear View ......................8 Connecting the VTL IT-85 Integrated amplifier to your system ........10 Voltage Setting........................11 Power Source for the VTL IT-85 Integrated amplifier ............11 Fitting the Batteries to the Remote Control................11 Chapter 3..........................
  • Page 5 Care and Maintenance of your VTL IT-85................20 Break in Period ........................20 Tube types..........................20 Tube Life..........................20 Bias checking and Setting....................21 Top view and Bias Measurement points and Tube complement of the IT-85 amplifier..24 Changing Tubes .........................24 Changing the Main and B+ Fuses..................26 Cleaning ..........................27 Troubleshooting .........................27 chapter 5..........................30...

  • Page 6: Chapter 1

    The VTL IT-85 is a true integrated amplifier, insofar as it has both a full line level preamplifier and a complete amplifier section in one compact package. We have chosen this route over the "high gain amplifier with passive volume control"...

  • Page 7: Symbol Conventions Used In This Guide

    Water and Moisture The IT-85 should be kept away from sources of water or moisture. If liquid enters the unit it must be immediately returned to your dealer for servicing. In this case you should under no circumstances try to power the unit on - there are hazardous voltages present in this unit that can cause serious injury if they come in contact with you.

  • Page 8: Location And Ventilation

    Location and Ventilation Install the IT-85 in a location that is stable and well ventilated. If the IT-85 is placed in a built-in installation, ensure that there is adequate room for a supply of air to flow through the ventilation openings. Allow at least 9 inches clearance on the top and around the sides of the IT-85.
  • Page 9 Do not exceed fuse ratings or attempt to bypass any fuses, as this can cause an extremely hazardous condition and will void any warrantees. Use only the same type and rating of fuses as specified in the owners’ manual and marked on the unit. IT-85 Integrated amplifier Owner’s Manual...

  • Page 10: Chapter 2

    We have found that the best way to remove the IT-85 from the box is as follows: With the box on a thick carpeted floor, fold back all the flaps of the top of the carton, leaving all the packing foam in place.

  • Page 11: Check For Tube Placement

    There should be no rattles inside either of the IT-85 or remote control units. Look through the vent slots and check to see that the tubes appear properly seated firmly in their sockets. Contact your VTL dealer immediately if physical damage is detected.

  • Page 12: It-85 Front Panel

    Once the unit is functioning correctly, put the protective cage back onto the IT-85 unit. Tighten the screws to make sure that the cage is securely fastened to the unit.

  • Page 13: The It-85 Rear View

    The Power On/Off switch is always used to turn the IT-85 on and off. Press the switch up to turn the IT-85 ON and down to turn the unit OFF. The Status LED should be on or off respectively, according to the setting of the Power On switch.
  • Page 14 The Main Fuse Holder contains the main power fuse. CAUTION: Replace fuses only with fuses of same type and rating. The Power Receptacle. is used for connecting the IT-85 to the AC power from a wall outlet using the power cord.

  • Page 15: Connecting The Vtl It-85 Integrated Amplifier To Your System

    3. Connect the Tape input and output cables to the IT-85 (if applicable). To take advantage of the tape record function, connect the Tape Out on your tape deck to the Tape in on the IT-85 and connect the Tape Out on the IT-85 to the Record In on your tape deck.

  • Page 16: Voltage Setting

    Connect the supplied power cord to the AC receptacle on the back of the IT-85. If you need a replacement and you are not sure what the appropriate cord should be, consult your authorized VTL dealer or the VTL factory customer support department.
  • Page 17 Being careful not to damage the cover or the remote shell, replace the back cover and slide it back into position with a snap. After power up of the IT-85, test the remote control functions and ensure that all the functions are working correctly. If the functions are not working then check that the batteries are in the correct mounting positions and that they are not stale.

  • Page 18: Chapter 3

    The blinking status LED turns into a steady light, indicating that the IT-85 is ready for use. Be sure to check the volume level while the unit is in the warm up state so the volume does not come on too loud when the IT-85 switches to operating state.
  • Page 19 4. Once the IT-85 completes its warm up cycle (30-50 seconds), the Status LED will stop flashing to indicate that the IT-85 is ready. In case the Status LED does not behave as described above, turn the power switch to off. Check to make sure that...

  • Page 20: Ground Loop Hum

    Ground Loop Hum If you get a ground loop hum from your stereo system after installation and power up you should immediately turn off the IT-85 and consult your VTL dealer or the VTL factory. Caution: Under no circumstances should you attempt to lift or defeat any grounds on electrical equipment plugged into the AC, as these grounds are installed for your and the equipment’s safety, and an ungrounded component...

  • Page 21: Powering The System Off

    LED blinking, the IT-85 will not be able to react to commands from the hand held remote. MUTE VOLUME pure tube REMOTE NP-2 Powering the system off 1. When you’re done listening to your system always turn the IT-85 and (any other power amplifier(s)) off first.

  • Page 22: Selecting Source Components

    2. Then turn the IT-85 volume control down all the way. This is a precaution to avoid a sudden loud signal in your system as it comes out of the power up sequence the next time you turn the IT-85 on.

  • Page 23: Connecting The It-85 To A Home Theater System

    IT-85 Processor/Amp In input, so that it will be able up to drive the front left and right speakers.

  • Page 24: Using The Tape Out

    To take advantage of the fixed out put record out feature of the IT-85, connect the tape deck’s input and output cables to the Tape Out and In connectors of the IT-85, as per the instructions in the Getting Started section of this manual.

  • Page 25: Chapter 4

    This is all that is needed to achieve burn in. Tube types The VTL IT-85 Integrated amplifier uses a total of 4 EL34 tubes for the output stage, 4 12AT7 tubes (2 per channel) for the input and driver stages in the amplifier section and 2 12AU7 tubes (1 per channel) in the preamplifier stage.

  • Page 26: Bias Checking And Setting

    There is a fuse on the back panel of the IT-85 that will protect the rest of the circuitry in the event that a tube fails or draws excessive current. If the fuse blows then you...
  • Page 27 Make sure that the IT-85 is . Remove the protective metal cage of the IT-85, and make sure that there is sufficient room around the unit for you to access the bias measurement points at the back edge of the IT-85.
  • Page 28 4. Place the IT-85’s protective cage firmly back onto the IT-85 after you are satisfied that the measurements are stable. Caution: If your observations do not conform to the...

  • Page 29: Top View And Bias Measurement Points And Tube Complement Of The It-85 Amplifier

    Right Channel Tubes Changing Tubes Do not attempt to change tubes yourself. Contact your authorized VTL dealer or the VTL factory service department so that a trained technician can perform this service. You will need to take the unit and this procedure to your dealer for them to perform this procedure and the corresponding bias procedure properly.
  • Page 30 #1 and #3 are fluctuating frequently and they are above or below the acceptable range this may indicate that a replacement of these two tubes is necessary. A full power test of the IT-85 may also need to be undertaken to ensure that all power tubes are conducting equally.

  • Page 31: Changing The Main And B+ Fuses

    Volt AC) ceramic. The B+ fuse is housed in a fuse holder located on the back panel of the IT-85, and the mains fuse is housed in a separate holder also located on the back panel of the unit. To change either fuse make sure the unit is powered off, and disconnect the AC power cord from the unit.

  • Page 32: Cleaning

    If there is no problem with the power source, check the fuse unit in the back panel of the IT-85. If the fuse is blown, refer to the “replacing the fuse” section in this manual. Turn the power on the IT-85 again. If the problem still persists, contact your authorized VTL dealer immediately.
  • Page 33 Note that in either case there is no damage being done to your VTL IT-85 while it is being used in these states and you can continue to safely use the IT- 85 until a solution is reached.
  • Page 34 If the remote control unit is still not functioning properly, contact your VTL authorized dealer or the VTL factory service department. IT-85 Integrated amplifier Owner’s Manual...

  • Page 35: Chapter 5

    3 A Slo Blo Ceramic (240 Volt AC) B+ Fuse Rating 0.75A A Fast acting 250V ceramic fuse Dimensions W = 16” (40 cm) 12” (30 cm) 7” (18 cm) Packed Weight 60 lbs. (27.22 Kg) IT-85 Integrated amplifier Owner’s Manual...

  • Page 36: Chapter 6

    If a VTL product fails to perform properly under the above warranty then the purchaser's sole remedy shall be to return the product to the authorized VTL dealer or to VTL Amplifiers Inc, where the defect will be repaired without charge for parts and labor.
  • Page 37 All warrantees apply only to VTL products purchased and used in the USA only. The importer to the country of sale offers international warranties on VTL equipment, with all applicable terms on the local warranty and superceding these terms.

  • Page 38: Appendix

    A P P E N D I X Warranty Registration Warranty registration for VTL products is valid in the USA only. International VTL customers should consult their local VTL dealer regarding product registration and warranty procedures. To obtain valid US warranty service, please fill out the enclosed VTL Warranty...

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