Krell Industries MD-20 User's Manual
Contents
1. igital to analog converter and then reselect the input you wish to use The n LED will now be steady and the clock will be locked 1 ee NOILVTIIVISNI F OPERATION OF THE CD TRANSPORT 1 Turn the CD transport ON by pressing the Power button The display will illuminate Select a disc and lace it on the spindle label side up Put the disc stabi izer on the center of the CD so it fits securely on the drive spindle CAUTIONS Never operate the CD transport without the disc stabilizer This can result in damage to the transport or your valuable compact discs b Never the disc stabilizer where the cover may accidentally close on it and damage the cover c Do not use any disc stabilizing tool besides the Krell 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 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 PAUSE Temporarily stops play of current track TRACK lt Reverse track select TRACK gt l Forward track select INDEX lt Reverse index select INDEX gt l Forward index select SEARCH lt Fast reverse search SEARCH gt l Fast forward search FTS Programs FTS memory will also play FTS encoded d2. mmm V D 200WNER S REFERENCE m A INTRODUCTION Congratulations on your purchase of the MD 20 CD turntable and welcome to the KRELL family of audio components You have joined a select group of listeners who enjoy only the finest in music reproduction We are dedicated to the development of technologically advanced components for the reproduction of digitally recorded music and continuing the Krell tradition of performance through leading edge tech nology This Owner s Reference is divided into several sections each designed to perform a different function Basic installation operation and a Question and Answer section are included where answers to common questions are provided Should you have any questions or suggestions lease feel free to contact your authorized dealer or the ELL staff for assistance In the unlikely event that your MD 20 should require service I 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 ser vice please consult your warranty registration card or your authorized KRELL Distributor B TABLE OF CONTENTS 3 UNPACKING AND ASSEMBLY 4 CUSTOM DUST COVER INSTALLATION 6 BASIC INSTALLATION AND CONNECTIONS 8 OPERATION OF THE CD TRANSPORT 10 REMOTE CONTROL 11 TRACK AND FTS PROGRAMMING 15 MAINTENANCE 16 QUESTIONS AND ANSWERS 18 SPECIFICA
3. the fuse free from the chassis 2 Check to make sure the foil in the center of the fuse is still connected If you are still unsure measure the fuse with an ohm meter to determine if it is intact The MD 20 uses a 1 amp fast blow fuse Should the fuse need replac ing use only the fuse specified 3 Place the fuse into the receptacle and push and turn ently clockwise until the fuse holder is fully seated do the unit into the AC wall socket and press the Power utton CAUTION Should the MD 20 not power up and continously blow fuses unplug the unit from the AC wall outlet and contact your Krell dealer or distributor I5 NV NON VA m J QUESTIONS AND ANSWERS Q My Digital to Analog processor will accommodate either fibre optic or coaxial digital inputs Which output should I use on the MD 20 A While a high quality 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 If an AT amp T or AES EBU input is available we recommend one of these interfaces be utilized Q When listening to certain discs I hear skipping noises Is there something wrong with the MD 20 A Due to the accuracy of the laser reading system in the MD 20 discs must be kept reasonably clean If the disc 15 it could be because of exc
4. used in conjunc tion with any of the other digital links like the AT amp T or AES EBU The TimeSync option can be ordered with the MD 20 or installed at a later time by an authorized Krell dealer or distributer NOTE The TimeSync system can only be utilized with certain Krell digital to analog converters and will not work with any other make or model Please consult your dealer or the Krell staff for specific information NOTE The TimeSync output can not be used as an addi tional digital output E TIMES YNC CONNECTION The TimeSync system is terminated via an AT amp T ST fibre optic cable 1 Connect AT amp T fibre optic cable to the termination labeled SPECIAL on the MD 20 Make sure the small key at the top of the fibre optic cable is upright and fits smoothly into the AT amp T receptacle twist the collar clockwise to lock the cable in place mE 2 Connect the free end of the fibre optic cable to the termination labeled TimeSync Ext clock on the back of your Krell digital to analog converter 3 Connect your digital interlink between the transport and digital to analog converter if not already connected 4 Select a digital source and press the TimeSync button on the front of your analog converter The corresponding led will illuminate indicating the TimeSync is locked Should the TimeSync LED flash this means the TimeSync clock has not locked and re resetting Select any other digital input on the
5. TIONS 19 WARRANTY AND SERVICE INFORMATION C UNPACKING AND ASSEMBLY 1 Open the box and remove the top layer of protective foam The following items will now be visible CD Stabilizer 1 AC power cord 1 MD 20RC Remote Control 1 Packet containing the Owner s Reference and warranty any of these items are not included please contact your authorized dealer immediately for assis tance 2 Remove the layer of foam containing these items and set it aside for later use Carefully remove the MD 20 from its box and remove the protective plastic wrap NOTE Save all packing materials If you must ship your MD 20 in the future repack the unit in its original pack aging to pu transit damage If the unit is returned to L for service please send the cover and the remote control unit CAUTION If your MD 20 has the Custom cover do not remove the acrylic dust cover from its protective sleeve at this time This cover is extremely delicate and can be ermanently scarred if mishandled Please follow the instructions provided in this Reference after safe installa tion 3 ee NOILO IGOMNMLNI IT D CUSTOM DUST COVER INSTALLATION 1 Standard Version Smoked Top Cover Remove the top cover in its protective sleeve from the shipping foam To prevent scratching leave the protective sleeve on the top cover until the cover mounting is com plete There are two pairs of screws with washer type receptacles attached t
6. egin TE disc to be programmed on the unit and press PLAY Once the unit reads the table of contents and displays the disc s playing time press STOP You can now begin programming the FT memory 1 Program the selections in the standard form described above 2 After you have programmed the tracks press the FTS button on the front panel or on the remote control The FTS indicator in the display will flash 3 While the indicator is flashing press the PROGRAM button The machine will then display a number on the screen briefly This 1s the FTS designation number When this number appears the FTS programming is complete NOTE You may want to label the disc you programmed with the FTS designation number so it can easily be erased or changed in the future 4 You can now start playing your FTS programmed disc TO PLAY AN FTS DISC 1 Press the FTS button on the remote or front panel before you press PLAY 2 The FTS indicator on the display will flash 3 While it 1s flashing press the PLAY button and the MD 10 will play only the tracks in FTS memory If you do not wish to play only the FTS selected tracks on a disc press Play with out pressing the FTS button first The entire disc will now play 12 TO ERASE FTS PROGRAM MEMORY NOTE FTS memory can only be erased via the front panel controls The remote control cannot erase FTS memory NOTE The disc does not have to be on the MD 20 to erase FTS memory Erasure can be c
7. er which will start the sequence into the keypad then push the PROGRAM or PROGR button A P will appear next to the track number 2 Enter the rest of the track selections in your program in the same manner remembering to push the program button after each track selected 3 Once you have finished your programming push the PROGRAM or PROGR button again ending the program sequence The machine will then review the tracks you have selected 4 Press the PLAY button and the program will begin While the program is running you can Pause Search and select tracks within the program You can start a track playin from the beginning by pressing the Play button ress STOP only to defeat or erase the program func tion 5 Press the REPEAT button and the machine will play your selected tracks over again in the same order they were programmed 6 To cancel your program push the STOP button FTS MEMORY FTS or Favorite Track Selection is a feature that enables you to store desired tracks on a CD in a specific order into the memory of the MD 20 Once you have pro grammed a disc with FTS the machine will give that specific CD a reference number The machine remembers this information and will play the tracks you have lected for that CD with a simple command The machine can also play the entire disc should you choose 11 ee IOWXLNOOJXTLONU mmm FTS PROGRAMMING To program tracks in the FTS memory NOTE Before you b
8. erent digital to analog converters Q Will the MD 20 play CD singles A Yes the MD 20 will play CD singles 17 SY AASNV UNV SNOILSAN m K SPECIFICATIONS TRANSPORT Modified Philips 1 MK11 with Hall effect motor swing arm design in a unicast frame LASER Single Beam with glass lens OUTPUT Digital only in industry standard SPDIF format 1 FIBRE OPTIC via standard interface 1 COAXIAL via RCA connector 1 AT amp T via ST connector 1 AES EBU via XLR connector REMOTE CONTROL Wireless infrared DIMENSIONS 19 0 wide 12 5 deep 6 0 high cover closed 15 0 high with cover open WEIGHT 20 pounds unit only 33 pounds in box L WARRANTY AND SERVICE INFORMATION There are no user serviceable parts inside the MD 20 The MD 20 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 es 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 1mmediately 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 If you think there are problems with your unit please contact your dealer distributor or the factory immediately The o
9. essive dirt or fingerprints Clean the disc and retry If the disc still skips try several others If it is only the first disc that is skipping the disc may need to be replaced If the unit mistracks on several discs contact your Krell dealer or distributor Q I can not seem to get the FTS programming feature to program my discs is there something wrong A Make sure the disc you wish to program is indexed or read by the machine before you start your program Refer to the FTS programming instructions in this refer ence Make sure when you are playing FTS encoded discs that the FTS button is pressed and the display reads FTS If the sequence is altered the MD 20 can not cor rectly correlate the FTS information Q Do you recommend I leave the MD 20 ON at all times A Yes These circuits are most accurate and stable when left to idle when not in use In fact discrete parts age faster when cycled ON and OFF The MD 20 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 20 play if the dust cover is fully raised A Certainly The unit will function perfectly even with the dust cover removed 16 Q Due to the exposed nature of the laser assembly is there a possibility of damage through laser radiation A No There is an optical sensor under the CD whe
10. he back of the unit the power cord is secured plug the cord into an AC outlet 6 Press the POWER button on the front panel The dis play will illuminate and the transport will now be active NOTE While the MD 20 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 7 Connect the Digital Output from the MD 20 to a Krell Digital Processor or other compatible digital to analog audio processor The MD 20 is compatible with industry standard Fibre Optic Coaxial RCA AT amp T wide bandwidth Fibre Optic ST type and AES EBU XLR output connectors NOTE Care should be taken in selecting the type of cable used to link the MD 20 to your processor We recommend both the AT amp T Fibre Optic due to its supe rior bandwidth and signal isolation properties and the AES EBU format due to its higher voltage transmission and noise rejection due to balanced format CAUTION The MD 20 is a CD Transport only It is not designed to connect directly to any preamp or analog signal processor The MD 20 is equipped with a special termination tem called TimeSync npe is a system that locks the clock between the MD 20 and specific Krell d to analog processors This connection is labeled SPE CIAL on the back of the MD 20 The termination is via an AT amp T fibre optic cable only and is
11. iscs PROGRAM Stores selected tracks in memory REPEAT Starts play from the beginning once disc has finished 8 3 Select a track on the CD to play with the remote con trol or via the front panel and press the Play button The music will now begin NOLL dO m G REMOTE CONTROL 1 The operating functions of the Remote Control are described below 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 PAUSE Temporarily stops play of current track TRACK Reverse track select TRACK gt l Forward track select INDEX lt Reverse index select INDEX gt l Forward index select SEARCH lt Fast reverse search SEARCH gt l Fast forward search FTS Programs FTS memory will also play FTS encoded discs PROGRAM Stores selected tracks in memory RPT Starts play from the beginning once disc has finished 2 The MD 20 remote control has a 10 digit The S in t es allows for direct access to specific trac e track number you want and press Play the track Punch you selected will begin playing The direct access keypad 1s convenient for track and programming H TRACK PROGRAMMING The remote control or the front panel of the MD 20 can be used to program specific tracks on a disc to be played in the order you choose The MD 20 can store up to 20 selections per program 1 Select the track numb
12. n it is positioned on the transport hub This allows the MD 20 to prohibit the laser from turning on when it is not cov ered with a CD Q I own many CDs that have CD Rings on them Am I able to use these discs with the MD 20 A Yes The MD 20 will accept discs with CD Rings Due to their very low mass they will not damage the MD 20 s transport While we can neither affirm nor deny the benefits derived from the use of CD Rings we do not feel that type of disc equilibrium device 1s required the MD 20 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 mass to the laser servo system and may burn out the drive Q Do you recommend the use of Cones or other damp ing feet with the MD 20 A Due to the extraordinary rigidity of our machining and internal damping we do not feel that the MD 20 requires additional mass coupling or isolation If you wish to use an after market isolation device you may do so without fear of pe ut Lp age MD 20 Any device which affixes permanently to the chassis or requires a breach of the external chassis will void the warranty NOTE Before any type of after market device is to be utilized in conjunction with the MD 20 please consult your dealer or the Krell staff for assistance Q Can I use more than one digital output at the same time A Yes The MD 20 can drive up to four diff
13. o save all the screws and washers after disassembly CUSTOM ACRYLIC COVER MD 20 KRELL DIGITAL INC MADE IN U S A NO USER SERVICEABLE PARTS INSIDE XLR SPECIAL 1 Remove the four original hinge retaining screws from the back of the unit 2 Remove the three washers from each screw 3 Gently place acrylic cover on the chassis top center the hinges to match the holes in the chassis 4 Insert the four screws without washers into the hinge and fasten loosely 5 Center the cover with the chassis and secure hinge block screws SEPT EMBER 1 1992 E BASIC INSTALLATION AND CONNECTIONS 1 Place the unit on a clean level surface away from excessive heat moisture or light Ideally the MD 20 should be placed on the top of an audio component cabi net or other open air rigid platform 2 The MD 20 may be placed in 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 20 can 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 an AT amp T fibre optic data link or an AES EBU balanced data link as they are more suited to long distance runs 5 Connect the AC power cord to t
14. o the back panel of the unit for mount ing the top cover Center the hin ge pins on the top cover over the two pairs of screws Carefully slide the hinges into the slots formed by the washers Push the cover down evenly on both sides until it is fully seated Finally remove the protective sleeve _ 2 Custom Version Clear Lucite Top Cover Remove the top 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 our screws from the unit and take off the black hinge receptacles Carefully place the lucite top cover such that the circular milled out portion is centered over the trans ort Align the slots in the cover s hinge blocks with the oles 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 is centered on the unit Once the cover 1s 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 INSTALLATION OF THE CUSTOM ACRYLIC DUSTCOVER FOR MD 20 REMOVEABLE MOLDED COVER MD 20 f ST NN 5 3 lhe KRELL DIGITAL INC EM MADE IN U S A NO USER SERVICEABLE PARTS INSIDE SPECIAL 1 To remove molded cover slide the cover assembly upward until the hinges are cleared from both sets of screws and washers 2 Be sure t
15. ompleted with no disc on the drive spindle 1 Press the FTS button on the front panel Hold the button in while pressing the forward or backward track select You will notice the machine is scrolling D FTS designation numbers Once you have found the FTS designation number you want to erase press the STOP button and the program will be erased 13 I MAINTENANCE Because of its superb build quality the MD 20 requires little maintenance Should the unit become excessivly dirty clean the lens assembly with a camera lens brush made of a soft material like camel hair The acrylic top pe and dust cover should be cleaned with the polishing t provided Read the directions on the containers for best polishing results REMOTE CONTROL BATTERY INSTALLATION AND REMOVAL The batteries in the remote control should be changed when the transport is no longer understanding or cor rectly responding to the commands sent from the unit Remove the four socketcap screws from the back portion of the remote control Remove the back plate to expose the battery storage compartment Refer to the polarity drawing while inserting the batteries Replace the back plate and insert the four socketcap screws FUSE INSTALLATION AND REMOVAL If the MD 20 does not seem to power up unplug the unit from the AC wall socket and check the fuse 1 Locate the fuse holder on the back of the unit labled FUSE Turn the fuse holder counterclockwise and gently pull
16. perating voltage of this unit is determined by the factory and can only be ML by an authorize KRELL distributer or the KRELL factory Any unautho rized voltage conversion will void the warranty Should the operating voltage of your MD 20 require changing contact KRELL Industries 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 Any unautho rized disassembly updates or modifications performed to the unit will void the warranty 19 ee OAAS eee o Ng o M A 0 l 0 4 DIGITAL INC o KRELL DIGITAL INC 35 HIGGINS DRIVE MILFORD CT 06460 SALES 203 874 3139 FAX 203 878 8373 COPYRIGHT 1992 KRELL DIGITAL INC MD209209
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