Krell Industries MD2 User's Manual
Contents
1. KRE MD 2 m COMPACT DISC TURNTABLE EE OWNER S REFERENCE A INTRODUCTION Welcome to the Krell family of audio components You have joined a select group of discriminating listeners who enjoy the finest in music reproduction Krell Digital KDI is dedicated to the development of technologically advanced components for the reproduc tion of digitally recorded music These designs continue the Krell tradition of uncompromising performance through leading edge technology This Owner s Reference 1s divided into several sections each designed to perform a different function A Question and Answer section is also included where answers to common questions are provided Should you have any questions or suggestions please feel free to contact your authorized dealer or the KRELL staff for assistance In the unlikely event that your MD 2 should require service you will be pleased to know that it is backed by a comprehensive Customer Satisfaction policy and one of the most advanced service facilities in the industry For detailed information on the terms and conditions of service please consult your warranty registration card or your authorized KRELL Distributor B TABLE OF CONTENTS 2 UNPACKING AND ASSEMBLY 3 DUST COVER INSTALLATION BASIC INSTALLATION AND CONNECTIONS OPERATION OF THE CD TRANSPORT REMOTE CONTROL CARE AND CLEANING QUESTIONS AND ANSWERS CON a SPECIFICATIONS 13 WARRANTY AND2. of damage through laser radiation A No There is an optical sensor under the CD when it is positioned on the transport hub This allows the MD 2 to poa laser from turning on when it is not covered with a Q I own many CD s which have CD Rings on them Am I able to use these discs with the MD 2 A Yes the MD 2 will accept discs with CD Rings Due to their very low mass they will not damage the MD 2 s transport While we can neither affirm or deny the benefits derived from the use of CD Rings we do not feel that an type of disc equilibrium device is required fa the MD 2 when properly used with our CD Stabi izer Caution We strongly advise against the use of any type of additional disc stabilizer These items add too muc to laser servo system and may burn out the rive Q Do you recommend the use of Cones or other damp ing feet with the MD 2 A Due to extraordinary rigidity of our machining and Internal damping we do not feel that the MD 2 requires additional mass coupling or isolation If you wish to use an after market isolation device you may do so without fear of damaging the MD 2 Any device which affixes permanently to the chassis or requires a breach of the external chassis will void the warranty I use both sets of COAXIAL outputs at the same time A Yes the MD 2 can drive two different digital to ana log converters Q Will the MD 2 play CD singles A Yes the MD 2
3. will play CD singles J SPECIFICATIONS TRANSPORT Philips CDM 1 MK 11 with Hall effect motor swing arm design in a unicast frame LASER Single Beam with glass lens OUTPUT Digital only in industry standard formats 1 FIBRE OPTIC via standard interface 2 COAXIAL via RCA connectors REMOTE CONTROL Wireless infrared DIMENSIONS 19 wide 12 5 deep 6 high cover closed 15 high with cover open WEIGHT 23 pounds unit only 28 pounds shipping weight es NO OLIVOLIDTTdS wO II KRELL DIGITAL IN 1 remove molded cover slide the cover assembly upward until the hinges are Cleared from both Seis of Screws and washers 2 Be sure to save all the screws and washers after disassembly COAX OUT OPTICS OUT FUSE 1 AMP PAST BLOW MARCH 1 199 WARRANTY AND SERVICE NFORMATION There no user serviceable parts inside the MD 2 The MD 2 has a limited warranty of three years parts and labor on transport related parts five years parts and labor on electronic parts Return freight is included in the warranty The warranty period begins on the date of urchase and is activated with the return of the enclosed arranty Card and a copy of the Sales receipt Please return the warranty card immediately after successful installation and operation are completed The warranty for Krell products is valid only in the coun try to which they were originally shipped and at the factory
4. ESTIONS AND ANSWERS Q My analog to digital processor will accommodate either fibre optic or coaxial digital inputs Which output should I use on MD 2 A While a high paur coaxial will perform quite well we recommend glass fibre optic cable due to its ability to completely isolate the grounding planes between the transport and processor and its resistance to RF interfer ence Q I have installed the MD 2 but the disc will not turn when I press PLAY What should I do A Check to see if you removed the transport screws from the bottom of the unit as stated in the UNPACKING AND ASSEMBLY section of this manual Caution Should this not be the cause of your difficulty do not Ton any repair of this unit Contact your autho rized Krell Dealer Distributor or the factory E SNV 5 a Q Do you recommend I leave the MD 2 ON at all times A Yes These circuits are most accurate and stable when left to idle while not in use In fact discrete parts age faster when cycled ON and OFF The MD 2 will sound better and last longer if left ON NOTE You should disconnect the AC cord from the wall outlet before any electrical storms or if you plan to be away from your home for prolonged periods of time Q Will the MD 2 play if the dust cover is fully raised A Certainly The unit will function perfectly even with the dust cover removed Q Due to the exposed nature of the laser assembly is there a
5. I CD Stabilizer This device has been specially machined to precisely match the CD transport Failure to heed this warning may cause damage to the laser transport 2 The functions of the front panel buttons that control the transport are described below DISPLAY Changes between track and elapsed time POWER Turns unit ON or OFF STOP Stops the disc from playing PLAY Starts the disc playing at track 1 will also restart play of the current track lt Reverse track select gt Forward track select lt lt Fast reverse scan gt gt Fast forward scan 5 w SOV dO Gw r REMOTE CONTROL 1 The operating functions of the Remote Control are described below PAUSE Temporarily stops the music at a specific point Pressing again resumes play from the same point STOP Stops the disc from playing PLAY Starts the disc playing at track 1 will also restart play of the current track lt Reverse track select gt Forward track select lt lt Fast reverse scan gt gt Fast forward scan 2 Battery Installation Remove the two hex head screws from the bottom por tion of the remote control s front plate Remove the small top plate to expose the battery storage compartment Refer to the polarity drawing while inserting the batter ies Replace the top plate and insert the two hex head screws H CARE AND CLEANING CAUTION Please read this section carefully to prevent damage through improper clean
6. If you think there are problems with your unit please contact your dealer distributor or the factory immediately Please do not return any unit to KRELL for repair with out first calling to discuss the problem and to obtain a Return Authorization number Freight to the factory or distributor is your responsibility Return freight to you will be paid by the factory or distributor 13 es PAYS ALNV2I2IVA mwa gt S a 0 l KRELL 2 DIGITAL INC k oO Sepa KRELL DIGITAL INC 35 HIGGINS DRIVE MILFORD CT 06460 SALES 203 874 3139 FAX 203 878 8373 COPYRIGHT 1991 KRELL DIGITAL INC
7. SERVICE INFORMATION NOI 1CGIO LLNI UNPACKING AND ASSEMBLY 1 Open the box and remove the top layer of protective foam The following items will now be visible Dust Cover encased in a protective sleeve CD Stabilizer AC power cord MD 2 RC Remote Control AAA Batteries for MD 2RC Packet containing the Owners Reference and warranty card Note If any of these items are not included please contact your authorized dealer immediately for assistance D 2 Remove the layer of foam containing these items and set it aside for later use Carefully remove the MD 2 _ transport from its box and remove the protective plastic wrap Note Save all packing materials If you must ship your MD 2 in the future hg the unit in its original packag ing to prevent transit damage If the unit is returned to KRELL for service please send the cover and the remote control unit Caution If your MD 2 has the custom lucite cover do not remove it from its protective sleeve at this time This cover is extremely delicate and can be permanently scarred if mishandled Please follow the instructions provided in this Reference for safe installation 3 Remove the transport screws from the bottom of the unit Their locations are marked with stickers on the bottom of the chassis NOTE Later production models have a protective plastic hub that secures the from the top of the unit during shipping Inst
8. d the display on the front will show two illuminated dashes This puts the unit in a standby condition NOTE While the MD 2 has superb regulation and does not require a dedicated AC circuit we strongly advise against any connections through extension cords or mul tiple AC adaptors High quality 15 amp grounded AC strips are acceptable 6 Connect the Digital Output from the MD 2 to a Krell Digital Processor or other compatible digital to analog audio processor The MD 2 is compatible with both industry standard Fibre Optic or Coaxial cable connec tors he Care should be taken in selecting the type of cable used to link the MD 2 to your processor If coaxial cable is to be used it should be 75 non capacitive with a band width in excess of 10 MHz to prevent dropout errors CAUTION The MD 2 is a CD Transport only It is not esigned to connect directly to any preamp or analog signal processor F TRANSPORT OPERATION 1 Turn the CD transport On by pressing the POWER button Select a disc and place it on the spindle label side up Put the disc stabilizer on the center of the CD so it fits securely on the drive spindle CAUTIONS a Never operate the CD transport without the disc stabi lizer This can result in damage to the transport or valuable compact discs b Never place the disc stabilizer where the cover accidentally close on it and be damaged c Do not use any disc stabilizing tool besides the KD
9. ead ol transport screws Caretully remove the black plastic hub by turning it counterclock 4 Remove the voltage identification sticker from the back of the unit You are now ready to install the dust cover CAUTION FAILURE TO REMOVE TRANSPORT SCREWS BEFORE OPERATION COULD RESULT IN DAMAGE TO THE TRANSPORT CAUTION FAILURE TO REMOVE THE PROTEC TIVE HUB BEFORE THE UNIT IS PLUGGED INTO THE AC RECEPTACLE OR BEFORE OPERATION a RESULT INDAMAGE TO THE TRANS D DUST COVER INSTALLATION 1 Standard Version Smoked Dust Cover Remove the dust cover in its protective sleeve from the shipping foam To prevent scratching leave the protective sleeve on the dust cover until the cover mounting is complete There are two pairs of screws with washer type _ receptacles attached to the back panel of the unit for mounting the dust cover Center the hinge pins on the dust cover over the two pairs of screws Carefully slide the hinges into the slots by washers Push cover down evenly on both sides until it is fully seated Finally remove the protective sleeve 2 Custom Version Clear Lucite Dust Cover Remove the dust cover from the protective foam and its protective sleeve There are two pairs of screws with washer type hinge receptacles on the back of the unit Remove the four screws from the unit and take off the black hinge receptacles Carefully place the lucite dust cover such that the circular milled out portion i
10. ing methods or materials 1 Due to the lt i poco nature of the laser transport assem bly on the MD 2 extra care should be taken to insure that it is not accidentally contaminated with fingerprints cleaning liquids etc During DE use the laser will not become dirty or contaminated any faster than an enclosed transport However the laser should be cleaned at least twice annually to remove residue from smoke and airborne oils To clean the laser lens place drop of CD cleaning fluid on a clean lint free cloth and gently wipe the lens clean lt gt Cautions a Do not oil the laser transport This mechanism is com pletely self contained and does not require customer maintenance b Do not touch any part of the exposed laser and servo system with your hands This could accidentally damage the drive unit 2 To remove finger marks and small scratches from the dust cover we recommend a light hand glaze which is specifically designed for plastics and painted surfaces At rell we use a product from 3M called Imperial Hand Glaze Its part number is 05990 Follow the manufacturer s directions 3 Should deeper scratches need to be removed we rec ommend a light or medium duty plastic polish such as Plastic Polish 2 Follow the manufacturer s directions and use the light type glaze to remove any swirl marks These cleaning products may be found in quality automotive body or detailing shops U
11. s centered over the transport Align the slots in the cover s hinge blocks with the holes in the back of the chassis Thread the four screws into the chassis through the hinge blocks Tighten down lightly and adjust the cover so it 1s cen tered on the unit Once the cover is aligned tighten down the supporting screws NOTE The clear lucite cover must be lowered manually as it is very heavy and does not have a damping mechanism n NOL TV LS www E BASIC INSTALLATION AND CONNECTIONS 1 Place the unit a clean level surface away from excessive heat moisture or op Ideally the MD 2 should be placed on the top of an audio component cabi net or other open air rigid platform 2 The MD 2 may be a cabinet It will require 17 0 Inches of vertical clearance between the bottom and top shelves for proper operation of the cover 3 If space is limited the MD 2 be operated without its dust cover Six inches vertical clearance is adequate to allow convenient access to the disc transport area 4 The location of the unit should be within 2 meters of the digital signal processor If longer distance is required we recommend using a fibre optic data link as it is more suited to long distance runs 5 Connect the AC power cord to the back of the unit a the power cord is secured plug the cord into an AC outlet When the MD 2 is connected to the AC outlet you will hear a soft clicking sound an
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