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Theta Digital Dreadnaught II Owner's Manual

Theta digital stereo amplifier owner's manual dreadnaught ii
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THETA DIGITAL
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D r e a d n a u g h t I I
Owner's Manual
REV 1.02

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Summary of Contents for Theta Digital Dreadnaught II

  • Page 1 THETA DIGITAL D r e a d n a u g h t I I Owner’s Manual REV 1.02...

  • Page 3: Preface

    In the unlikely event that you have to return your Dreadnaught II to the factory for service, or if you send it to us for updating, the original packaging will best protect the unit from shipping damage.
  • Page 4 The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of significant magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.

  • Page 5: Dreadnaught Ii Identification Record

    Dreadnaught II Identification Record This information is for your records and for future identification of the Dreadnaught II. Please take a moment to fill out all pertinent data now, and as upgrades and/or options are installed. Whenever upgrades, inquiries and/or changes are requested, the serial number will be required.

  • Page 6: Safety Precautions

    IS NOT A GROUND, AND CANNOT BE CONNECTED TO A SYSTEM GROUND OR LOUDSPEAKER SYSTEM WITH A COMMON GROUND. CONSULT YOUR SPEAKER MANUFACTURER TO ENSURE THAT ANY SPEAKER IN YOUR SYSTEM THAT WILL BE CONNECTED TO THE DREADNAUGHT II DOES NOT HAVE INTERNAL CIRCUITRY WITH A COMMON GROUND.

  • Page 7: Table Of Contents

    PREFACE ... ii WARNING...iii Dreadnaught II Identification Record ... iv SAFETY PRECAUTIONS ...v INTRODUCTION ...1 Getting to know your Dreadnaught II ...1 Burn-In Time ...1 Reference Manual Conventions...1 IMPORTANT NOTICE ...2 Dreadnaught II Block Diagram...3 Front Panel Layout...5 Front Panel Layout – Rackmount Option...6 Rear Panel Layout ...7...
  • Page 8 This page was intentionally left blank...

  • Page 9: Introduction

    INTRODUCTION Getting to know your Dreadnaught II This Dreadnaught II has been put through a rigorous and unique testing procedure that ensures that it will last for many years with minimal service requirements. This procedure includes the following: • All assembled circuit boards are given a thorough visual inspection and are then tested in a bench- reference Dreadnaught II.

  • Page 10: Important Notice

    IMPORTANT NOTICE It is imperative that the Dreadnaught II be connected to a ground via its three wire AC power cord. It is important that the AC power outlet, which the Dreadnaught II is plugged into, is actually grounded. Failure to do so will severely compromise the performance, reliability and safety of use of the Dreadnaught II.

  • Page 11: Dreadnaught Ii Block Diagram

    Dreadnaught II Block Diagram Figure 1 - Block Diagram (Dreadnaught II showing single channel module)
  • Page 12 Dreadnaught II Block Diagram con’t. Figure 2 - Block Diagram (Dreadnaught II showing two channel module)

  • Page 13: Front Panel Layout

    Front Panel Layout STANDBY button. After the rear panel MAIN POWER switch is turned on press the front panel STANDBY button to exit the standby mode. All channels on the stereo bus will come out of standby. If the surround bus is active, with specific channels assigned to it, they will exit the standby mode as well.

  • Page 14: Front Panel Layout - Rackmount Option

    Front Panel Layout – Rackmount Option Figure 3b – Rackmount Front Panel Layout STANDBY button. After the rear panel MAIN POWER switch is turned on press the front panel STANDBY button to exit the standby mode. All channels on the stereo bus will come out of standby. If the surround bus is active, with specific channels assigned to it, they will exit the standby mode as well.

  • Page 15: Rear Panel Layout

    Channel THERMAL LED. Illuminates when the channel rises above the maximum operating temperature. The Dreadnaught II should be powered off and cooled when this LED is lit. Channel RAIL FUSE + LED. When this LED is illuminated, the fuse on the positive rail of the channel is blown.

  • Page 16: Ac Power Input

    19. SURROUND REMOTE TRIGGER jack. When the rear panel SURROUND TRIGGER jack receives a 5-12 VDC pulse the Dreadnaught II’s surround mode will change from its current status, either on or off. 20. DB9 RS232 connector. Used for connecting a system control device to the Dreadnaught II to control and monitor its functions.

  • Page 17: Operation

    RS232 RS232 is an option in the Dreadnaught II. It can be installed at any time either at the factory or an authorized Theta dealer. All functions of the Dreadnaught II can be controlled and monitored via RS232, using either the RJ45 or DB9 connector.

  • Page 18: Appendix A Troubleshooting Guide

    Appendix A Troubleshooting Guide If the Dreadnaught II should function abnormally during operation, please review the items in the following checklist. Please be sure to thoroughly check all other connected components such as speakers, preamplifiers, as well as cables. Symptom...

  • Page 19: Appendix B Wiring Diagram

    Consult your speaker manufacturer to ensure that any speaker in your system that will be connected to the Dreadnaught II does NOT have internal circuitry with a common ground. Damage will occur if the negative terminal is connected to ground, or to a...

  • Page 20: Appendix Crs232 Protocol

    Examples: 1) To select put the Dreadnaught II into standby: Send FE, E8, 01, 00, 00, 00 (all values in Hex). Where FE and E8 are the header, 01 = command, 00 = main standby, 00 = put unit in standby and 00 = filler...
  • Page 21 Command Description Argument 1 Argument 1 Description Standby Status The RS232 can be set using a hardware jumper to automatically send changes to the RS232 port. Status Byte # Byte Description Temperature Fuse Plus Rail Fuse Minus Rail Channel Sense Argument 2 Argument 2 Desc Main standby...
  • Page 22 RS232 Hardware Connections Figure 6 – Dreadnaught II RS232 Jack Pinout These are the connector drawings only. The RS232 cable must be a regular RS232 or mouse extender cable, wired pin for pin.

  • Page 23: Rs232 Jumper Settings

    Figure 7 – Dreadnaught II RS232 Jumper Settings RS232 Jumper Settings There are 2 possible Baud rates: 9600 and 19200. The factory default is 19200. To change the baud rate to 9600, move the jumper to the center and top pins (if the RS232 board is orientated as in figure 7).

  • Page 24: Appendix D Specifications

    Appendix D Specifications Inputs: Analog Audio: 1 Single-ended per channel (RCA) on each module type. 1 Balanced per channel (XLR) on each module type. Input Impedance: Input sensitivity: Mono Module: Gain: Polarity: (Single-ended) (Balanced) Pin-2 = Positive, Pin-3 = Negative for Non-Inverting Output. Outputs: Analog Audio: 1 balanced output per channel.
  • Page 26 90 DAY LIMITED WARRANTY TERMS AND CONDITIONS Theta Digital Corporation, henceforth referred to as Theta, warrants the product designated herein to be free of manufacturing defects in material and workmanship, subject to the conditions set forth herein, for a period of 90 days from the date of purchase by the original purchaser, henceforth referred to as purchaser.

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