Ci TM PROFESSIONAL POWER AMPLIFIERS 6 6 6 6 6 6 6 6 6 6 6 6 OWNER’S MANUAL
Intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: Risk of electrical shock — DO NOT OPEN! CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside.
IMPORTANT SAFETY INSTRUCTIONS WARNING: When using electrical products, basic cautions should always be followed, including the following: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions.
WICHTIGE SICHERHEITSHINWEISE ACHTUNG: Beim Einsatz von Elektrogeräten müssen u.a. grundlegende Vorsichtsmaßnahmen befolgt werden: 1. Lesen Sie sich diese Anweisungen durch. 2. Bewahren Sie diese Anweisungen auf. 3. Beachten Sie alle Warnungen. 4. Befolgen Sie alle Anweisungen. 5. Setzen Sie dieses Gerät nicht in der Nähe von Wasser ein. 6. Reinigen Sie es nur mit einem trockenen Tuch. 7. Blockieren Sie keine der Lüftungsöffnungen. Führen Sie die Installation gemäß den Anweisungen des Herstellers durch. 8.
INSTRUCTIONS IMPORTANTES DE SECURITE ATTENTION: L’utilisation de tout appareil électrique doit être soumise aux precautions d’usage incluant: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Lire ces instructions. Gardez ce manuel pour de futures références. Prétez attention aux messages de précautions de ce manuel. Suivez ces instructions. N’utilisez pas cette unité proche de plans d’eau. N’utilisez qu’un tissu sec pour le nettoyage de votre unité.
INSTRUCCIONES IMPORTANTES PARA SU SEGURIDAD CUIDADO: Cuando use productos electrónicos, debe tomar precauciones básicas, incluyendo las siguientes: 1. Lea estas instrucciones. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Guarde estas instrucciones. Haga caso de todos los consejos. Siga todas las instrucciones. No usar este aparato cerca del agua. Limpiar solamente con una tela seca. No bloquear ninguna de las salidas de ventilación.
Important Precautions 1 Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2 Read all documentation before operating your equipment. Retain all documentation for future reference. 3 Follow all instructions printed on unit chassis for proper operation. 4 5 6 7 8 9 Do not spill water or other liquids into or on the unit, or operate the unit while standing in liquid.
Table Of Contents 1.0 Introduction 2.0 Getting Started 2.1 Unpacking 2.2 Installation and Mounting 2.3 Requirements and Considerations 3.0 Amplifier Layout 3.1 Front Panel 3.2 Rear Panel 3.3 Side Panels 4.0 Amplifier Operation 4.1 Input Sources 4.2 Output Connections 4.3 Output Configuration 4.4 Removable Attenuator Knobs 4.5 Gain Select Switch 4.6 Signal Ground Lift Switch 4.7 Sequential Turn-On/Turn-Off (STO) 4.8 Module Bay 4.9 TourClass® Protection Features 5.0 NexSys Module Basics and Installation 5.
Introduction Welcome Congratulations on your purchase of a Crest Audio Ci family of Power Processing amplifiers. Please read this manual carefully (especially the “Important Precautions” section located inside the front cover) as it contains information vital to the safe operation of the amplifier. Also, please fill out and return the enclosed product registration card.
Installation Ci Owner’s Manual TM Getting Started This chapter covers the basics for setting up the Ci. Refer to this chapter in order to get the amplifier up and running quickly, and pay special attention to the Requirements and Considerations section. It contains important information concerning the operating conditions necessary to operate the Ci in a safe and stable fashion. Also be sure to refer to the Precautions page at the front of this manual for additional safety warnings.
Installation Ci Power Processing amplifiers are 2 rack space units of 17 1/8” (437mm) depth that mount in a standard 19-inch rack. On all amplifiers, four front panel-mounting holes are provided. Rear mounting ears are also provided on all amplifiers for additional support, which is essential in non-permanent installations like mobile or touring sound systems, and recommended for permanent installations as well.
Features Overview Ci Owner’s Manual TM 6 1 3 6 6 6 6 6 6 6 6 6 6 6 4 56 7 7 2
Features Overview This chapter identifies and labels all the switches, indicators, connectors and functional components with which a Ci owner should become familiarized. Getting to know the items in this chapter and their locations on the Ci will make the subsequent chapters in this manual much clearer. Keep in mind that this chapter is provided only as an overview of the amplifier’s layout, and does not contain all the information necessary to effectively operate the Ci.
Features Overview 12 3 4 5 6 rear panel 6 6 6 6 6 6 6 6 78 9 0 6 6 6 6 Ci Owner’s Manual TM ¡ Ô 1 Circuit Breaker A push type circuit breaker is located on the rear of the amplifier. If this breaker trips repeatedly, the amplifier needs servicing. 2 IEC Connector A standard IEC power connector is located on the rear panel of amplifier. The connector accommodates a standard IEC line cord, included in the amplifier box.
Features Overview 8 Attenuators Each channel has an attenuator knob to adjust the channel’s output from -∞ to 0dB. 9 Rear Panel Status LED’s The “Signal,” “ACL/IGM,” “Fault,” and “Mute” LED’s on the rear panel serve the same function as the front panel LED’s of the same names. 0 Input Connectors The Ci uses one 3-pin Phoenix connector per channel for balanced line-level audio input. These inputs can also be setup to accept an unbalanced signal.
Amplifier Operation Input Sources Ci Power Processing amplifiers are designed to accept a balanced input signal. For use with an unbalanced source, tie the inverting (minus) input to ground by installing a jumper across the appropriate Phoenix connector terminals. If the inverting input is left floating, a 6 dB loss in gain will result. See the diagram below. (Wiring diagram for unbalanced input) Output Connections Speakers are connected using the Output Barrier Strip connectors.
Amplifier Operation Stereo For stereo operation, turn the amplifier off and set the Mode Select Switch to the stereo position. In this mode, both channels operate independently of each other, with the input attenuators controlling each channel’s level. Thus, a signal at Channel 2’s input produces an amplified signal at Channel 2’s output, and the same for other stereo channels. Parallel Mode To send the same signal to both channels, connect the input signal to Channel 1 via the Input Barrier Strip.
Amplifier Operation Sequential Turn-On/Turn-Off (STO) Ci Power Processing amplifiers come standard with Sequential Turn-On/Turn-Off (STO) circuitry. If the amplifier front power switch is set to “remote,” a single SPDT toggle switch or two SPST momentary switches can be used to turn the amplifier on and off. Using the same switch(es), additional amplifiers can be turned on/off sequentially by daisy chaining the STO “Out” terminals of one amplifier to the STO “In” terminals of a subsequent amplifier.
Amplifier Operation Module Bay Ci Power Processing amplifiers come standard with a blanking panel fixed over the module bay. When a NexSys module is installed in this bay, connection to a network is made via a standard RJ-45 connector and CAT-5 Ethernet cable. Refer to module documentation for exact connection and control information. Module Removal Only jumper setting changes or module upgrades require modules to be removed from the amplifier.
Amplifier Operation Ci owner’s manual TM Thermal Protection If the temperature of the amplifier’s output devices becomes abnormally high, the Ci will protect itself by opening its output relays (disconnecting itself from its load) and shutting down the amplifier’s output stage. The Protect LED will light if this occurs. If the power transformer gets too hot, its thermal sensing circuit will disconnect both channel outputs. The Active LED will extinguish and the Protect LED will again illuminate.
NexSys® Modules 5.0 NexSys Module Basics and Installation Although the Ci Power Processing amplifiers are venerable audio workhorses in their own right, the true breadth of their capabilities is only reached once they are tied into a NexSys amplifier network. In order for a Ci to capitalize on this network potential, it must be equipped with one or more of a series of NexSys modules.
NexSys® Modules 3 Orient the network module as shown in the picture below, with the text right side up. Connect the exposed end of the ribbon cable to the connector on the module, again taking note of the keying of the connectors. (Picture showing orientation of module and module connector) 4 Slide the module into the bay, and fasten it to the Ci’s chassis with the screws removed in Step #1. (Picture showing the final installation of the network module.
NexSys® Modules NexSys module installation diagram NexSys Modules 7 Module Features These following pages describe the buttons, indicators, connectors and functional components that are relevant to the two NexSys modules. These features exist on both the NxEthernet8 and NxCobranet8 Modules. Features specific to the NxCobranet8 Module are discussed later in this chapter. 1 4-character Display The LED display shows the value of the current parameter for the function chosen.
NexSys® Modules NexSys Modules 7 7 Fault LEDs Each channel has a fault LED on the module panel. If one or more of a channel’s faults is triggered,this LED will illuminate. A fault code will also appear in the display. 8 Mute LEDs Each channel has a mute LED that will illuminate if the channel is muted through the control software. 9 RJ-45 Network Connector The Neutrik® EtherCon® ruggedized RJ-45 connector allows connection of the CKi amplifier to an Ethernet network.
NexSys® Modules Setting Amplifier ID Use the Function button to choose Amp ID. Each Amp ID is composed of two, two-digit hexadecimal values (see Appendix C for more information on Hex Numbering).The upper two digits (the High Value) and the lower two digits (the Low Value) can be independently adjusted. For this function, the Select button toggles between these two values. Select a value for adjustment, and press Edit.
NexSys® Modules AC Line Voltage Use the Function button to choose AC Voltage. The AC line voltage will be displayed. Advanced Feature Menu Security Lockout Select Gateway (Default Route) viii. Fault Monitoring The Amp ID’s The Amp ID’s given to each amplifier in a NexSys system are composed of two independently adjustable two-digit hexadecimal values. It is not necessary to fully understand hexadecimal numbering in order to set an Amp ID, but it is helpful to know.
NexSys® Modules Here is the decimal example described: 10 = (1*ten) + (0*one) = ten Likewise, other decimal values: 35 = (3*10) + (5*1) = 30 + 5 = 35 528 = (5*100) + (2*10) + (8*1) = 500 + 20 + 8 = 528 2046 = (2*1000) + (0*100) + (4*10) + (6*1) = 2000 + 000 + 40 + 6 = 2046 However, since this is really only converting decimal back into decimal, it is of limited usefulness. Retaining the above concepts and applying it to the other numbering systems makes things much more clear.
NexSys® Modules Of course, a similar approach can be applied to hex. However, this time there are more digits than in decimal. Now, counting to “9” is the same as in decimal, but it is possible to continue on with “A,” “B,” “C,” “D,” “E,” and “F.” It is only once “F” is exceeded that a new placeholder is required, and it will of course have a value sixteen times that of the placeholder to its right.
NexSys® Modules Troubleshooting 1. The new FPGA code uses the “Mute” LEDs to decode faults with the amplifier. If the MUTE LED is lit, then the following fault has occurred: Channel 1 Mute LED: Heat sink Temperature reading is not within limits as read from U37 pin 5 on main PCB. (0 - 80 degrees C). Channel 2 Mute LED: Transformer Temperature sensor is bad or not plugged in (J13 on main PCB).
