User manual B&K PHONO 10

SIMPLY BETTER! B&K Components, Ltd. Phono 10 Owner's Manual B&K P/N12839 0902 B&K Components, Ltd., 2100 Old Union Road, Buffalo New York 14227-2725 Phone 1-800-543-5252 or (716) 656-0026, Fax (716) 656-1291 E-mail: info@bkcomp.com Web: www.bkcomp.com ii TABLE OF CONTENTS Table of Contents...................................................................................................................................iii Safety Precautions .................................................................................................................................1 Introduction .............................................................................................................................................2 Features ...................................................................................................................................................2 Rear Panel View ......................................................................................................................................3 Design and Construction .......................................................................................................................4 Phono 10 Connections ...........................................................................................................................4 Phono Stage ............................................................................................................................................5 Selecting Moving Magnet / Moving Coil ...............................................................................................................................5 Capacitive Loading .................................................................................................................................................................6 Resistive Loading....................................................................................................................................................................6 Control I/O Connections.........................................................................................................................8 Gain Switch .............................................................................................................................................9 Digital Output ..........................................................................................................................................9 Troubleshooting....................................................................................................................................10 Care and Cleaning ................................................................................................................................10 Specifications .......................................................................................................................................11 Limited Warranty..................................................................................................................................................................12 Returning Equipment ............................................................................................................................................................12 WWW.BKCOMP.COM ...........................................................................................................................13 iii SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: to prevent fire or shock hazard, do not expose this unit to rain or moisture. Care should be taken to prevent objects or liquid from entering the enclosure. Never handle the power cord with wet hands. · The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user of the presence of uninsulated "dangerous voltage" within the product's enclosure that may constitute a risk of electric shock to you. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the unit. Observance of polarity is essential. Double-check connections before turning the receiver or preamplifier on. The Phono 10 can be damaged if polarities are incorrect. Turn your receiver or preamplifier and Phono 10 `off' before plugging in or unplugging cables!!! The Phono 10 is equipped with raised feet. They help to keep acoustic feedback into the unit at a minimum. They also provide a measure of protection against scratching any surface the unit might be resting on. Do not alter or remove them. Do not stack anything on top of the Phono 10 (preamplifier, processor, source...etc.). Always unplug the Phono 10 from the AC power source before removing the top cover and making any changes to the Moving Coil (MC) or Moving Magnet (MM) stage inside the unit. Important! · · · · · · 1 INTRODUCTION Thank you for selecting B&K Components, Ltd.'s Phono 10 phono preamplifier. The Phono 10 is a discrete circuit DC coupled topology RIAA phono preamplifier. It features a selectable head amp for use with both Moving Coil (MC) and Moving Magnet (MM) players. In addition to a control I/O circuit is incorporated for standby / turn-on from an external device there is also a S/PDIF coax digital output for use with CD quality recording. Gold plated connectors have been utilized to minimize degradation in the signal path. In order to obtain maximum performance from this unit, please read the following instructions very carefully. Again, we at B&K Components, Ltd. would like to thank you for purchasing a Phono 10 preamplifier and wish you many years of listening pleasure. FEATURES 1% Metal Film Resistors - High quality resistors allow a lower noise floor and better sound. Control I /O - Circuit allows for power `on' and `off' muting and external control for other components. Direct coupled output - Provides a full and accurate, three dimensional reproduction of source material. Discrete Circuitry ­ Allows minimum loading of the Phono cartridge and maximum amplification dynamic range. FET loading ­ Allow maximum linearity with minimum noise. Gold Plated Connectors ­ Provides for minimum signal loss and degradation. Optional Digital output ­ Allows the Phono 10 to be used for transferring records to your Computer, CD or DAT player. If not currently installed in the Phono 10, the S/PDIF *Digital output board is available for upgrade. RIAA accuracy - +/- .2 dB through the use of polypropylene film capacitors. This produces a transparent sound with highly accurate musical timbre. Toroidal Transformer - Efficient, high current, shielded transformer that supplies the amplifier with a clean and constant supply of power, even during highly demanding source material passages. Wide bandwidth - Assures clear reproduction with all styles of music. 2 REAR PANEL VIEW Control I /O Gain Switch Left and Right Analog Outputs Left and Right Analog Inputs 1 CAUTION CONTROL I/O ENABLE voltage 2 IN D I G I TA L OUT GAIN -10dB 3 LEFT OUTPUT GND 4 LEFT INPUT RISK OF ELECTRIC SHOCK DO NOT OPEN AC IN S E R . N O. + + D E F E AT + + RIGHT OUTPUT + RIGHT INPUT WE SIMPLY SOUND BETTER. B&K www.bkcomp.com + OUT 12V 35mA 0dB B&K Components, Ltd. Made in the U.S.A. 7 AC Receptacle 6 Digital Output 5 Ground Binding Post Phono 10 Rear Panel 1. Control I / O 2. Gain Switch 3. Analog Outputs 4. Analog Inputs 5. Ground Binding Post 6. Digital Output 7. AC Receptacle 1. Control I /O - For remote turn on from receiver or preamplifier. 2. Gain Switch - Adjusts the output level by 10 dB. Allows matching the output level to other source levels. 3. Analog Outputs - Connect the Phono 10 to a receiver or preamplifiers analog input. 4. Analog Inputs ­ Connect a Phono Player to the Phono 10. 5. Ground Binding Post - For connecting ground from a Phono Player to the Phono 10. 6. *Digital Output ­ Connect the Phono 10 to a S/PDIF coax digital input for playback and/or recording. 7. AC Receptacle - For attaching the supplied AC power cord to the Phono 10. *Digital output is an option (Upgradable) 3 DESIGN AND CONSTRUCTION The Phono 10 utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent and highly musical sound can be realized. The high quality parts complement includes state-of-the-art solid state devices, 1% metal film resistors, polypropylene capacitors and a low noise toroidal transformer. PHONO 10 CONNECTIONS All leads should be connected securely to the input and output terminals. Loose connections can lead to impaired performance, noise interference and possible damage to your equipment. When making connection changes of any sort (reinserting input lead pins, changing phono cartridges, etc.), be sure to first turn your receiver or preamplifier's power off as well as the Phono 10's power (light indicator off). Typical interconnections are illustrated in Figure 1. Figure 1 NOTE: A grounding post is provided for connection to the phono player. 4 PHONO STAGE The phono stage of the Phono 10 may be configured for either Moving Magnet (MM) or Moving Coil (MC) applications with the additional capability to set the resistive and capacitive loading of the phono cartridge. Note: Your Phono 10 has already been configured for a MM stage with a resistive load of 50 Kohms. You do not have to perform any modifications unless you so desire. To reconfigure your Phono 10, follow the appropriate procedure listed below. IMPORTANT - ENSURE THAT THE POWER CORD IS DISCONNECTED FROM THE AC OUTLET PRIOR TO PERFORMING ANY OF THE FOLLOWING PROCEDURES! SELECTING MOVING MAGNET / MOVING COIL 1. Locate the 2-position slide switch on the inside of the unit (see Figure 2). It is located near the back left side with the front of the unit facing you. The switch can be identified by its blue color and white tab in the center. MC and MM are labeled on the board on either side of the switch. 2. Slide the center white tab left or right to select the type of phono stage that is desired. Left = Moving Coil (MC), Right = Moving Magnet (MM). NOTE: The Phono 10 is shipped from the factory with the phono stage set to the MM configuration and a resistive load of 50 Kohms. Selecting the MC stage without changing the resistive loading (see "Resistive Loading") will result in an effective load of 133 ohms. Figure 2 5 IMPORTANT - ENSURE THAT THE POWER CORD IS DISCONNECTED FROM THE AC OUTLET PRIOR TO PERFORMING ANY OF THE FOLLOWING PROCEDURES! CAPACITIVE LOADING NOTE: The Phono 10 is shipped from the factory with no capacitor installed. Typically, the capacitance of the phono cables (Cphono cables) is sufficient and no capacitor is needed. The capacitance (Cload) should be: Cload = Ccartridge - Cphono cables - 75 pF 1. Determine the capacitor value (pF) for proper loading of the MM cartridge in accordance with the specifications of the cartridge you have selected. The manufacturer of the cartridge may suggest a recommended value. The capacitive loading affects both the MM and MC stage. 2. With the front of the unit facing you, locate the two gold plated pin receptacles with the label "CLOAD" between them. They are located near the back left of the circuit board. 3. Trim the leads of the capacitors (one per channel) to approximately 3/8 inch. 4. Insert the leads into the "CLOAD" pin receptacles securely. RESISTIVE LOADING NOTE: The Phono 10 is shipped from the factory with a 100K ohm resistor installed and the phono stage MM configuration selected (see "Selecting Moving Magnet / Moving Coil"). This resistor should not be removed unless the resistive loading is being changed in accordance with the following guidelines. 1. Determine the resistor value for proper loading of the cartridge in accordance with the specifications of the cartridge you have selected. The manufacturer of the cartridge may suggest a recommended value. The resistive loading affects both the MM and MC stage. The factory installed resistors in the Phono 10 will match most phono cartridges on the market. IMPORTANT - ENSURE THAT THE POWER CORD IS DISCONNECTED FROM THE AC OUTLET PRIOR TO PERFORMING ANY OF THE FOLLOWING PROCEDURES! A. The resistive loading for the MM stage can be calculated using the following equation: Ri (in Kohms) = (100,000 * Rc) / (100,000 - Rc) Where: Ri = inserted resistor value Rc = cartridge loading value (must not exceed 100 Kohms) **1 Kohms = 1,000 ohms ** For example: Rc (desired) = 50 Kohms Ri = (100,000 * Rc) / (100,000 - Rc) Ri = (100,000 * 50,000) / (100,000 - 50,000) Ri = 100 Kohms (factory installed) Refer to (Table 1) for more examples. B. The resistive loading for the MC stage can be calculated using the following equation: Ri (in ohms) = (133 * Rc) / (133 - Rc) Where: Ri = inserted resistor value Rc = cartridge loading value (must not exceed 133 ohms) For Ri >> 1300, Rc = 133 ohms For example: Rc (desired) = 100 ohms Ri = (133 * 100) / (133 - 100) Ri = 403 ohms (use 402 ohm standard value resistor) Refer to (Table 1) for more examples. 6 Table 1 Resistive Loading Examples Rc desired (Ohms) 25 45 MC 75 100 125 5.0 k 20.0 k MM 35.0 k 50.0 k 75.0 k * Factory Installed 2. With the front of the unit facing you, locate the two gold plated pin receptacles with the label "RLOAD" between them. They are located near the back left of the circuit board. (See Figure 3) 3. Trim the leads of the resistors (one per channel) to approximately 3/8 inch. 4. Insert the leads into the "RLOAD" pin receptacles securely. Ri calculated (Ohms) 30 68 171 403 2.1 k 5.3 k 25.0 k 53.8 k 100.0 k 300.0 k Ri standard (Ohms) 30.1 68.1 169 402 2.10 k 5.36 k 24.9 k 53.6 k * 100 k 301 k Figure 3 7 CONTROL I/O CONNECTIONS A control input/output is provided on the Phono 10 preamplifier to remotely turn the unit on and off. A receiver or preamplifiers control output, such as is provided with the B&K series, can be utilized to provide a control signal to the Phono 10. If a B&K amplifier is also being used, the control signal can be extended to include each successive component by simply running a 1/8 inch mini jack cable from the CONTROL OUT connector of the Phono 10 to the CTRL IN connector of the amplifier. This is commonly referred to as "daisy chaining". An example of how to connect these components is illustrated in Figure 4. If a source other than a B&K receiver or preamplifier is used to control the Phono 10, only the control output voltage from the source is critical. It must be within the range, as indicated on the rear panel, 5 - 24V DC. The Phono 10's CONTROL OUT will provide each successive component with a control voltage of 12V DC for reliable operation. The Phono 10's control output may be used as a source of 12V DC @ 35 mA for other user applications as well. DO NOT POWER MOTORS WITH THIS CIRCUIT! Figure 4 If the control function is desired, each component in the system must remain connected at all times and the control must be enabled. To enable the control function, the CONTROL ENABLE button must be out for each controllable component in the system. For more information on the Phono 10's output status under various control conditions, refer to (Table 2). Table 2 @ CTRL IN Signal Signal No Signal No Signal Button Position OUT IN OUT IN Output Status Sound Sound Mute Sound @ CTRL OUT Signal Signal No Signal Signal NOTE: The control voltage is for muting control only. Each component must be connected to its own source of AC power in order for it to operate. 8 GAIN SWITCH A gain switch is provided on the Phono 10 to help match the Left and Right output level to that of the other sources in the system. This is useful in maintaining a constant volume level of the receiver or preamplifier when selecting different sources. When the switch is "IN", the output signal level is 0 dB. When the switch is "OUT", the output level is decreased by 10 dB. NOTE: If the Phono 10 has Digital Output capability the digital output level is related to the setting of the gain switch. DIGITAL OUTPUT An RCA, coaxial, *Digital Output is provided on the Phono 10. It outputs a 44.1 kHz, 24 Bit signal for CD quality recording. The digital output level is related to the setting of the gain switch. A typical connection is shown below: Figure 5 *Digital output is an option (Upgradable) 9 TROUBLESHOOTING PROBLEM No sound (`On' LED not illuminated) POSSIBLE CAUSE 1. Power cord not plugged in 2. Power off at AC source 3. AC power inlet fuse blown or faulty 4. Control switch in the wrong position 1. Source to Phono 10 cables loose or faulty 2. Phono 10 to preamplifier cables loose or faulty 3. Input not correctly selected on preamplifier / receiver 1. Poor ground connections in interconnect cables 2. Poor ground in main AC supply 3. Cables running near AC power cords 4. Phono ground not connected between phono player and Phono 10 POSSIBLE SOLUTION 1. Reconnect power cord 2. Check AC switch or fuse 3. Check for shorts or overloading 4. Place control switch in proper position (Page 8) 1. Tighten, repair or replace cable 2. Tighten, repair or replace cable 3. Check source settings on preamplifier / receiver 1. Check all connectors and repair as necessary 2. Check ground of outlet. Have it checked by qualified serviceman 3. Reposition cables 4. Connect phono ground 1. Check setting of the Gain Switch (Page 9) 2. Check setting of MC / MM switch (page 5) 1. Check LOAD capacitors and / or resistors for proper installation No sound on 1 or both channels (`On' LED illuminated) Loud hum or buzz on one or more channels Sound is lower in volume compared to other sources Sound is distorted on 1 or both channels 1. Gain switch is in the low output level setting 2. MC / MM switch in wrong position according to cartridge type 1. LOAD capacitors or resistors installed improperly or missing * *Note: If unit continues to blow power inlet fuses, DO NOT USE A HIGHER RATED FUSE, please contact customer service to have the unit serviced. CARE AND CLEANING Under normal use, the Phono 10 will not require any special care. Clean the exterior of the unit by wiping it with a damp cloth to remove any dirt or dust that accumulates. Do not let any liquid enter the amplifier through its vents or top cover. It is recommended that the connectors on the rear panel be cleaned annually using isopropyl alcohol. 10 SPECIFICATIONS Moving Coil Sensitivity (at 1 kHz) Moving Coil Overload (at 1 kHz) Moving Coil Load Resistance Moving Coil Capacitance Moving Coil (S/N A Weighted) Moving Magnet Sensitivity (at 1 kHz) Moving Magnet Overload (at 1 kHz) Moving Magnet Load Resistance Moving Load Capacitance Moving Magnet (S/N A Weighted) Input Impedance Output Impedance Maximum Output Level Frequency Response Digital Output Digital Output (S/N A Weighted) Dimensions in Inches .09 mV 17 mV Variable Variable 78 dB .8 mV 225 mV Variable Variable 89 dB 50 k Ohms 221 Ohms 9 V RMS 5 Hz - 20 kHz 44.1 kHz / 24 bit 95 dB Width 17 Height 2¼ Depth 8½ 8.5 10 watts / .1 amps .5 Amp/250 Volt Fast Blow Shipping Weight (lb.) Power Consumption Replacement Fuse Specifications and design are subject to change at any time without notice. 11 LIMITED WARRANTY B & K Components Ltd., referred to herein as B & K, warrants your B & K equipment against all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the original purchaser and only to equipment in normal residential use and service. Defective equipment must be returned to B & K, prepaid, accompanied by proof of purchase and sufficient payment to cover the cost of return shipping and handling, and will be repaired or replaced at the discretion of B & K whose decision as to the method of reparation will be final. This warranty shall not apply to any equipment which is found to have been improperly installed, incorrectly fused, misused, abused, or subjected to harmful elements, used in any way not in accordance with instructions supplied with the unit, or to have been modified, repaired or altered in any way without the expressed, written consent of B&K. This warranty does not apply to the cabinet or appearance items such as the faceplate or control buttons, nor does it cover any expenses incurred in shipping the unit to and from the manufacturer's service depot. This warranty on B & K Components, Ltd. products is NOT VALID if the products have been purchased from an unauthorized dealer or an E-tailer or if the original factory serial number has been removed, defaced or replaced in any way. B & K Components, Ltd. sells its products through authorized dealers in order to insure that consumers obtain proper dealer service and support. Buying from an authorized B & K Components, Ltd. dealer insures that you have a FACTORY WARRANTY on your B & K Components, Ltd. product. If you have any questions concerning your Factory Warranty call B & K Components, Ltd. at 716-656-0023. Upgradability: B & K is one the first manufacturers in the audio/video industry to consistently offer software and hardware upgrades to its processing of audio signals. Through upgrades B & K delivers exceptional value to its customers. But what is "Upgradability"? Upgradability is not a guarantee; we define it as a philosophy of designing and manufacturing products so that as audio technology evolves, B & K can provide enhancements and improvements to its products that are economically viable. THE EXPRESS FACTORY WARRANTY HEREIN CONTAINED IS IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY, UPGRADABILITY OR OF FITNESS FOR ANY PARTICULAR PURPOSE. B&K COMPONENTS, LTD. SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE FOR DAMAGES, INCLUDING SPECIAL, INCIDENTAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE PURCHASE, USE OR PERFORMANCE OF ANY B&K PRODUCT. This warranty gives you specific legal rights. Your may also have other rights which vary from State to State. Some States do not allow the exclusion or limitation of incidental or consequential damages and the foregoing exclusions may not apply to you. No agent, representative, dealer or employee of B&K has the authority to increase or alter the obligations or terms of this warranty. RETURNING EQUIPMENT No equipment may be returned to B&K Components Ltd. without a RETURN AUTHORIZATION (RA). Should you find it necessary to return equipment to B&K, for any reason, a RETURN AUTHORIZATION (RA) number must be issued by B&K in respect of the equipment being returned. You may request an RA number by calling B&K at the numbers below. We will need the following information to issue your RA number. Please have it ready before you call. 1. 2. 3. 4. Your name, address, and phone number. The model and serial number of the equipment being returned. A description of the problem being experienced. Your sales receipt. Your call will be referred to a Technical Service Representative who will work with you to resolve the problem. If it is determined that the unit must be returned for repair, an RA number will be issued. B&K Components, Ltd., 2100 Old Union Road, Buffalo New York 14227-2725 Phone 1-800-543-5252 or (716) 656-0026, Fax (716) 656-1291 E-mail: info@bkcomp.com Web: www.bkcomp.com 12 WWW.BKCOMP.COM B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 Phone: 716 ­ 656 - 0026 13