Musical Fidelity KW250S Stereo Amplifier User Manual
Contents
1. Issue 2 19th June 2006 Page 17 of 24 KW2508 AMPLIFIER CONNECTIONS All input output and power connections should be made with the mains power switched OFF INPUT CONNECTIONS Phono The KW250S has a pair of RCA type phono input sockets intended for use with moving magnet MM or moving coil MC pickups Some turntable pickup arm combinations are fitted with an extra wire for chassis earth This should be connected to the earth terminal on the back panel Line level inputs The unit also has two stereo pairs o RCA line level input sockets controlled by the internal volume setting They both have the same input sensitivity and are therefore suitable for use with any source component having a line output of 300mV nominal The two sockets on the rear panel are marked AUX1 AUX2 PDL corresponding with function selector buttons on the front panel The AUX2 PDI input sockets on the back share the same input as the PDI input jack at the front Do not connect devices to both sides of the AUX2 input simultaneously Please see note P 20 Digital inputs Digital sources are catered for on the AUX1 AUX 2 inputs Unit automatically switches AUX1 input to digital source type coax optical on insertion of a lead with digital signal present OUTPUT CONNECTIONS Speakers Connect your loudspeakers to the terminals on the back panel marked as LEFT and RIGHT SPEAKER outputs Make sure both speakers are connected with the2. Wrong connections between input remote control to cancel sources and the unit Check audio input lead connections Speakers not connected or Check speaker cables incorrectly wired Devices connected to both AUX2 rear Remove one of the devices connector and PDI front panel input simultaneously Sound is not precise lacking in bass Speakers are connected out of phase Ensure speakers are connected and stereo image i e connections to one speaker correctly and are reversed Audio connector plug not fully Insert plug securely pushed in Remote control does not work Amplifier s POWER switch is setto Set switch to on off Insert batteries correctly One or more batteries fitted the wrong Change batteries for a new set way round y Ensure there is no obstruction Batteries are flat between the remote control and Remote control is not pointed directly amplifier front towards the front panel of the amplifier Remote control range has greatly Batteries are running out Change batteries for a new set reduced If none of these actions affect a cure please contact your dealer or an authorised Musical Fidelity service agent Remember never open the case of the KW250S yourself as this will invalidate the guarantee Issue 2 19th June 2006 Page 21 of 24 KW2508 Disc mechanism Total correlated jitter DAC circuits Up sampling Total correlated jitter Linearity Output digital 0dB level Analogue outpu
3. CD function buttons 2 DISPLAY incorporates remote control IR receiver TUNER function buttons 3 CD drawer AMPLIFIER function buttons 4 VOLUME knob PDI Portable Device Input 3 5mm jack 5 POWER mains on off switch connector REAR PANEL CAUTION THIS APPLIANCE MUST BE EARTHED IMPORTANT LOUDSPEAKER OUPUTS Right hand side AUX 1 AUX 2 DIGITAL INPUTS PRE amp TAPE OUTPUTS RCA coaxial and optical PHONO AUX 1 AUX 2 PDI INPUTS PHONO GROUNDING 4mm post LOUDSPEAKER OUPUTS Left hand side DAB FM AERIAL SOCKET F type DIGITAL OUTPUTS RCA coaxial and optical IEC MAINS INLET Issue 2 19th June 2006 Page 8 of 24 KW2508S REMOTE CONTROL The remote control shown below enables functions to be operated from a convenient distance Equivalent buttons on the remote control have the same functions as those on the front panel of the unit Other functions are only available by remote control As the handset uses an invisible infra red light beam the front edge must be pointed directly towards the receiver window at the front of the player without visual obstruction between them If the range of the remote control greatly decreases replace the batteries with ne
4. available Please refer to your portable device s manual use as opposed to headphones if the option is for more details Note Please note the sockets PDI at the front and AUX2 PDI at the back are electrically connected together If the front PDI socket is used please ensure you disconnect any devices and wires connected to the rear AUX2 PDI connectors If the rear AUX2 PDI connectors are used please ensure you disconnect any devices and wires connected to the front PDI socket Failure to do so could result in equipment failure RECORDING To record to any format of your choice simply select the required source with the input selector button on the front panel or remote control This source will now be routed to the KW250S TAPE OUT for recording by tape deck cd recorder DAT minidisk or computer soundcard input You will also be able to hear the selected source through the loudspeakers Note adjustment of the volume control has no effect on the recording level Issue 2 19th June 2006 Page 20 of 24 KW250S AMPLIFIER PROBLEMS Basic problem solving with an amplifier is similar to troubleshooting other electrical or electronic equipment Always check the most obvious possible causes first such as the following examples No power when POWER button is Mains power plug is not fully inserted Plug in securely pressed into rear socket No sound Mute function is still active Press the MUTE button on the
5. lt and gt gt I If the unit has stopped playing a specific track can be accessed directly by pressing either PREVIOUS or NEXT to obtain the required track number then pressing PLAY PAUSE TRACK SELECTION Remote control Simply press the PLAY button to start a CD playing from the first track Alternatively a specific track can be selected directly by pressing one of the ten track number buttons grouped in the centre section of the remote control The chosen track then plays after a short delay of about 5 seconds To play a track number with two digits press the second digit button on the remote control within this delay period example for track 17 Press 1 Press 7 within about 5 seconds After a small pause machine plays selected track If a track number is chosen which is not available on the disc for example pressing button number 9 if the CD has only 7 tracks an INVALID TRACK message is briefly displayed along with elapsed time of last track played Issue 2 19th June 2006 Page 10 of 24 KW2508 CD SPECIAL FEATURES REPEAT PLAYBACK The REPEAT button on the remote control allows the repeated playback of either one track or all tracks on the disc By pressing the REPEAT button once only the current track is repeated and the display shows If the REPEAT button is pressed a second time repeat disc is displayed instead and the entire disc is then played repeatedly
6. Dev F mod 1 KHz 0 5 nV 63 dB 90MHz 200mV 22 5KHz Dev Fmod 1 KHz 0 5 90MHz 200mV 75KHz Dev Fmod 1 KHz 30 dB CENELEC EN50067 compliant FM Band 88 108MHz Band III 174 240MHz L Band 1452 1492MHz 2dBi 5dBi 75Q lt 2 0 1 at res freq Vertical F type 20 to 65 C 30 to 75 C Sleeve 36mm Retracted 153 1 0mm Extended 646 10mm 180 swivel joint on plug with locking nut Page 22 of 24 SECTIONS EXTENDED Omm 546 10 a KW2508S Line inputs Phono input Connections Weight Dimensions Power Voltage RMS Voltage Peak to peak Current peak to peak Damping factor Output devices per channel Pre out impedance THD noise 20Hz to 20 kHz Signal noise ratio Input sensitivity for 250 Watts Input impedance Overload margin Channel separation Frequency response AMPLIFIER SPECIFICATIONS 250 Watts per channel into 8 Ohms 24dBW 400 Watts per channel into 4 Ohms 45 Volts 20Hz to 20 kHz 127 3 Volts 75 Amps 140 4 50 Ohms lt 0 01 gt 100dB A weighted 330mV 220k Ohms 26dB gt 70dB typical 20Hz to 20 kHz 0 0 2dB RIAA IEC combined response see graph PHONO RESPONSE 20 0 31 5 50 0 80 0 125 200 315 500 1000 1600 2500 4000 6300 10000 16000 Frequency Hz Signal noise ratio Input sensitivity Input impedance Overload margin Aerial input Digital inputs Digital
7. PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE CAUSING EYE INJURY IF THIS PRODUCT DEVELOPS A FAULT PLEASE CONTACT YOUR AUTHORISED MUSICAL FIDELITY SERVICE AGENT DO NOT ATTEMPT TO SERVICE IT YOUR SELF AND DO NOT CONTINUE TO USE THIS PRODUCT IN A FAULTY STATE INTERNAL LASER WARNING LABELS COMBINED AMPLIFIER CD PLAYER DAB FM TUNER A O aw woe CASER PRODU ai conws THIS APPLIANCE MUST BE EARTHED m n KAW O O Soleohe IMPORTANT cor C J ee i vanuekcnise noe THIS PRODUCT COMPLIES WITH DHHS RULES 21 CFR CHAPTER 1 SUBCHAPTER J PART 1040 AT DATE OF MANUFACTURE THIS PRODUCT COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO TWO CONDITIONS CLASS 1 1 THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND LASER PRODUCT 2 THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION Issue 2 19th June 2006 Page 4 of 24 KW250S SAFETY INFORMATION Manufacturer Sharp Optical pick up Pick up type GH6C005B Wavelength 780nm RADIO FREQUENCY INTERFERENCE RFD This equipment uses and can r
8. outputs Line level inputs Line level outputs Speaker outputs Power requirement 29 5 kg 65 Ibs 37 0 kg 81 5 lbs 485 mm 19 1 inches wide gt 96dB A weighted 2 5mV moving magnet 47k Ohms 24dB 1 F type female with securing thread DAB FM 1 optical TOSLINK 2 S PDIF RCA connector 1 optical Toslink 44 1 48 kHz 1 S PDIF RCA connector 48 kHz 2 pairs line level RCA connectors 1 front panel 3 5mm jack socket sharing AUX2 input 1 pair phono MM MC RCA connectors 1 pair RCA preamp controlled by the volume 1 pair RCA tape record fixed line level output 1 pair 4mm banana plug binding posts per channel 100 115 230Volts AC 50 60Hz factory pre set 700 Watts maximum into 8 Ohms 80 Watts idle unit only unboxed in shipping carton 170mm 6 7 inches high including feet 470 mm 18 5 inches deep including terminals Standard accessories Issue 2 19th June 2006 Telescopic tri band aerial with F plug connector IEC type mains lead 16 Amp type Remote control A5 universal type 2 batteries size LRO3 or AAA manganese alkaline type Musical Fidelity reserves the right to make improvements which may result in specification or feature changes without notice Page 23 of 24 KW250S RELEASE DATE CHANGES Issue 1 1 June 2006 1 release Issue 2 19 June 2006 Presentation updated Issue 2 19th June 2006 Page 24 of 24
9. performance but as with all electronic devices it is necessary to observe a few precautions Heed all warnings shown on the back of the product Only connect the KW250S to a mains outlet having the same voltage as marked at the back of the unit Always ensure that when disconnecting and reconnecting your audio equipment the mains supply is switched off Position the mains lead and signal interconnects where they are not likely to be walked on or trapped by items placed on them Do not use near water or place water filled containers on the KW250S for example a flower vase or potted plants If water does spill inside immediately pull out the mains plug from the wall socket and inform your dealer who should then check the unit before further use Entry of liquid into the KW250S is dangerous and may cause electric shock or fire hazard Do not place the unit near direct heat sources such as radiators direct sunlight or other equipment Do not remove any covers or try to gain access to the inside There are no internal adjustments or fuses you can replace yourself Refer all service work to an authorised Musical Fidelity agent Note Unauthorised opening of the equipment will invalidate any warranty claim Dust regularly with a soft cloth or soft brush but be careful when using cleaning or polishing agents they may harm the surface finish The electronics in modern hi fi equipment is complex and may therefore be adversely affected or da
10. result is a CD player and DAB FM tuner which has a smoother response than previously possible with none of the hardness of other units The preamplifier sections are our finely tuned and tweaked tube input line level preamplifier for smooth tube sound coupled with low noise and virtually no distortion This also includes our top quality low noise phono stage which caters for both MM and MC cartridge users The power amplifier consists of two mono block amplifier modules with completely separate supplies for the absolute best in separation and imaging Rated for 250W nominal they are enough to drive even the most demanding loudspeakers with ease Low distortion and very quiet they will deliver all music types exactly as the artist originally intended The resultant performance achieved by this unit is among the best in the world It has excellent signal to noise ratio low distortion wide bandwidth huge dynamic range extraordinary resolution and fine detail INSTALLATION Position the KW250S on a stable horizontal surface where there is no risk of it being knocked or subjected to vibration such as from loudspeakers Protect your KW250S from humidity if the unit is moved from a cold place to a warm room or in generally humid conditions moisture can form on the pickup lens inside the player preventing the laser beam from reading the disc If this happens remove the CD close the disc drawer and leave the unit switched on for an
11. same polarity PRE The KW250S has its pre amplifier output available from RCA sockets on the back panel marked PRE OUT and is controlled by the volume adjustment This is to allow bi amplification using suitable external amplifiers and crossover networks to power the speaker drive components separately giving noticeable improvement in clarity imaging and bass weight In this arrangement typically the KW250S speaker outputs may be used to drive the speaker s tweeter high audio frequencies and an external higher power stereo amplifier s could drive the woofer low frequencies f The KW2508 s PRE OUT RCA sockets would therefore be connected to the input of the external woofer amplifier in this example If you are in doubt about bi amplification please contact your dealer for advice TAPE OUT The KW250S has a single tape output with facilities for recording material to a suitable line level recorder such as tape CD R RW minidisk etc The tape deck s line inputs are connected to the units TAPE OUT sockets to record the material being listened to The line outs should be connected to the unused of the AUX inputs Issue 2 19th June 2006 Page 18 of 24 KW2508 AMPLIFIER OPERATION STARTING Once all connections are made switch on the unit using the POWER button to the bottom left of the front panel the front panel of the KW250S the blue display will li
12. 1 of 24 KW250S Continue entering track numbers in the same way up to KW250S display brightness can be controlled in three a maximum of 25 If more than 25 tracks are attempted the levels by pressing the DISPLAY button on the remote memory will not accept any extra ones and the display reverts control to prog 1 The original setting is maximum brightness but by pressing Remember that when entering a single digit track number the DISPLAY button once brightness is reduced and a there is a delay of about two seconds before the display further press turns the display off This controls display in accepts the entry this is to allow time for a second button to CD TUNER and external source modes be pressed when a double digit number is required If an incorrect entry is made say track 99 when there are only 7 tracks available on the disc a brief error message is displayed If at any time you wish to add a track to the list press the CLEAR button to obtain the next step number Alternatively to delete a previous entry press CLEAR a second time to remove the last entry Repeated pressing of CLEAR will then erase each step in reverse order So to delete an entire program sequence from the memory press CLEAR repeatedly until prog 1 is shown in the display When the last track number has been entered press PROGRAM a final time then the PLAY button to start the program sequence If you wish to check the sel
13. KW250S O Ws a S S N A A E E INSTRUCTIONS FOR USE Thank you for purchasing the Musical Fidelity KW250S This model uses the very latest DAB FM radio text receiver top quality CD transport ultra low jitter 24 Bit DAC technology and further jitter reduction techniques to achieve both an excellent technical specification and unparalleled DAB FM CD sound quality This is complimented with a top quality 6922 tube line level preamplifier stage and two monobloc power amps capable of driving over 250W The KW250S is a perfect answer to most hi fi requirements in a single beautifully engineered package Used properly and carefully it should give many years of outstanding musical reproduction Dust regularly with a soft duster or soft brush but be careful when using cleaning or polishing agents they may harm the surface finish If you have any questions about your audio system Please consult your dealer who is there to help and advise KW2508 CONTENTS Safety information Safety information General advice General advice Facilities and connections Remote control CD basic operation CD special features CD problems DAB button functions FM function buttons Tuner problems Amplifier connections Amplifier operation Amplifier problems CD DAC and tuner specifications Pre amp Power amplifier specifications Manual history Issue 2 19th June 2006 Mains plug U K only
14. Modification warning Laser product labelling Laser type Radio frequency interference Installation precautions User information Introduction Installation Aerial Audio connection Notes on using compact discs Cleaning Illustrations front and rear panels Operation and illustration Loading playback and track selection Repeat shuffle scan programming Basic CD player fault finding Band auto tune manual tune presets info menu Auto tune band manual tune presets mono stereo info menu Basic tuner fault finding Input connections output connections Phono CD Tuner AUX1 AUX2 recording Basic Amplifier fault finding Page 2 of 24 KW250S IMPORTANT U K only This unit is supplied in the U K with mains lead fitted with a moulded 13 amp plug If for any reason you need to cut off the plug please remove the fuse holder and dispose of the plug safely out of reach of children It must not be plugged into a mains outlet The wires in the mains lead supplied with this appliance are coloured in accordance with the following code BIUGC 0 ccccesseescecvesvsees Neutral BrOWD ccceeeesssscscceeeseeeeees Live WARNING This appliance MUST be earthed As the colours of the wires of the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured green and yello
15. OWER button is pressed Power plug is not inserted Plug in securely fully into rear socket No playback when disc is Disc is loaded with label side down loaded NO DISC Incorrect disc type displayed Dirty disc Moisture humidity or cold affecting laser lens Re load with label side up Please load a standard audio CD Clean disk and try again Leave unit on for an hour to allow moisture to evaporate No audio output or too low level output Output muted Volume set too low Check mute is not on Turn volume up Line level audio lead is connected to phono input sockets of the amplifier Sound is severely distorted and volume control needs to be turned down very low Re connect lead to auxiliary sockets or other line level amplifier input Mis tracking sound jumping Player is receiving vibration or shock Disc is dirty Moisture humidity or cold affecting laser lens Change position of player away from loudspeakers Clean disc surface Leave unit on for an hour to allow moisture to evaporate Hum Audio connector plug is not fully pushed in Insert plug securely Interference noise heard from radio tuner Player is positioned too near the tuner Keep a reasonable distance between player and tuner or switch off player power Remote control does not Player s POWER switch is set to off Set switch to on work Battery ies fitted the wrong way round Inser
16. Pressing REPEAT a third time cancels repeat mode A B _ REPEAT PLAYBACK A B repeat provides the option of playing just a certain section of the disc over and over again Find the beginning of the required section either by listening or using the display time as a guide When the desired starting point is reached press button A B on the remote control The display will show When the disc has reached the end of the required section press the A B button again to display and the unit continuously plays the selected part of the disc in this case the segment of track 1 from 34 seconds to 1 minute 55 seconds To cancel A B repeat mode press A B on the remote control SHUFFLE PLAYBACK The SHUFFLE feature allows tracks on the discs to be played in random sequence rather than the normal consecutive order Tracks are also played in a different order each time the disc is restarted or another disc loaded This function is obtained by pressing SHUFFLE on the remote control with the unit either stopped or playing If the KW250S is already playing play will continue in random order until all tracks on the disc have been played Shuffle play is cancelled by pressing the SHUFFLE button a second time The unit resumes normal play function continuing to the end of the disc in normal order starting from wherever it was left by the previous random selection From stop mode pressing PLAY PAUSE also begins shuffle p
17. adiate radio frequency energy and if not installed and operated in accordance with the instructions may cause interference to radio communications However it is designed to radiate minimal levels of RFI and accordingly been testing to North American standards FCC regulations limits for a class B digital device pursuant to part 15 of the rules These requirements are intended to provide reasonable protection against excessive interference in a residential installation Conversely the product has also been checked to ensure that its own operation is not adversely affected by normal background levels of RFI received externally However if interference is experienced for instance to radio or TV broadcasts the user is recommended to try one or more of the following measures e Identify the source of interference by turning off power to the CD player or other equipment individually and checking whether the problem disappears e Re orientate or relocate the receiving aerial e Move the CD player away from the receiver e Connect the CD player to a mains outlet on a different circuit from the receiver e Consult a dealer or experienced TV radio technician for help If a problem persists please contact Musical Fidelity s service department Issue 2 19th June 2006 Page 5 of 24 KW250S GENERAL INSTALLATION INSTALLATION PRECAUTIONS and USER INFORMATION Your new KW250S is designed and built to provide trouble free
18. d on the Cancel mute function on the pre amp pre amp or amplifier or amplifier Tape monitor function on the pre Cancel tape monitor function on the amp or amplifier has been selected pre amp or amplifier accidentally Check speaker cables Speakers not connected or incorrectly wired Excessive background noise hiss or Position of aerial incorrect Reposition aerial crackle on FM Aerial signal strength insufficient Consider a rooftop DAB FM aerial see Audio cuts out on DAB P 6 Aerial Antenna Tuner does not display FM RDS Tuned station does not transmit the RDS information feature therefore station name and or text RDS feature unavailable Signal insufficient to receive RDS Try repositioning the whip aerial if used Improve the aerial Remote control does not work Tuner s POWER switch is set to off Set switch to on One or more batteries fitted the Insert batteries correctly wrong way round Change batteries do not mix old and Batteries are flat new ones Remote control is not pointed directly Ensure there is no obstruction between towards the front panel of the tuner the remote control and player tuner Remote control range has greatly Batteries are running out Change batteries for a new set reduced If none of these actions affect a cure please contact your dealer or an authorised Musical Fidelity service agent Remember never open the case of the KW250S yourself as this will invalidate the guarantee
19. ection before playing back your program the CHECK button can be pressed to step through each program entry in turn If during this check sequence the PLAY button is pressed the remaining part of your programmed selection will play to the end of the sequence Otherwise to play all the programmed tracks from the beginning of the sequence press PLAY PAUSE or PLAY on the remote control The gt gt I button may be pressed to jump to the next track in the programmed sequence or lt lt button to obtain the previous track in the sequence When all programmed tracks have been played the CD player stops The same track selection can then be played again by pressing the PLAY PAUSE button on the front panel or PLAY on the remote control To repeat a programmed sequence continually press REPEAT whilst playing the program To cancel this mode press PROGRAM Note The program contents will be cleared if you switch off the power or open the disc drawer and load another disc If however the same disc is loaded again with the power still switched on the program sequence is retained in the memory Issue 2 19th June 2006 Page 12 of 24 KW2508 CD PROBLEMS Basic problem solving with a CD player is similar to troubleshooting other electrical or electronic equipment Always check the most obvious possible causes first such as the following examples Problem Probable Cause Remedy No power when P
20. ed by the word PLAY appearing on the left of the display with 1 in the centre and elapsed time on the right When all tracks on the CD have been played the display shows STOP and total number of tracks on the disc PAUSE Pressing the PLAY PAUSE button on the front panel whilst a disc is playing pauses playback of the disc PAUSE appears in the display window instead of PLAY The disc will continue spinning but the track does not advance and the CD s output is muted Pressing PLAY PAUSE again resumes playback from the same place PAUSE Remote control On the remote control PLAY and PAUSE buttons have separate functions at each end of the same button Pressing PLAY will only control disc play and pressing PAUSE will not resume play Note that if the disc is already playing pressing the PLAY button reverts play to the beginning of the current track STOP Playback can be stopped at any time by pressing the STOP button once On the remote control press either end of the button not the middle part Pressing the STOP button a second time on front panel or remote opens the transport drawer If a disc is loaded but not playing pressing STOP once will also eject the drawer TRACK SELECTION To change track the track skip buttons PREVIOUS and NEXT on the front panel can be pressed to jump forwards or backwards one track in either direction Corresponding TRACK buttons on the remote control are marked lt
21. embles and pick out all the locally available stations When a station is found the name is briefly displayed and the station tally at the top right increments Note if there are stations already stored the tally does not start from 0 but from the number of stations previously stored In this manner the station list is updated Once all the locally available bands have been scanned the unit reverts to the first station found by name in alphabetical order or the previous broadcast being listened to if applicable TUNE UP DOWN To select a station simply turn the left hand knob to cycle through the list of receivable broadcasts in your area When the required station is displayed push the knob or press the SELECT button to listen See the section on the PRESET buttons to store favourite stations for easy recall PRESET UP and PRESET DOWN PRESET UP DOWN buttons are used to select one of ten DAB preset memory locations Press select when the desired preset is displayed STORE It is possible to store favourite stations in preset memory locations using the STORE button as follows Tune to the station required Press PRESET UP DOWN buttons until the desired preset is displayed Press and hold the STORE to accept this preset The display will indicate the preset is saved then reverts to the selected station Note this will overwrite any station stored previously on this preset Briefly pressing
22. essed again VOLUME UP DOWN sets volume level DISPLAY Dims display CLEAR Clears selected pre programmed track l A B Sets repeat start end to repeat section of track SHUFFLE Plays back tracks in random order TRACK Next previous track PAUSE PLAY Stop start CD playback Page 9 of 24 KW2508 CD BASIC OPERATION LOADING AND PLAYING COMPACT DISCS Select CD function by pressing CD button under AMPLIFIER heading to the right of the front panel the CD button on the remote does the same To load a disc press the OPEN CLOSE button to open the transport drawer When the drawer is fully extended insert the disc with the label facing upwards and then press either the OPEN CLOSE or PLAY PAUSE button to close the transport drawer again If OPEN CLOSE has been pressed the disc drawer closes and the unit scans the contents of the disc After a short delay the display window then shows the total number of tracks available on the CD and total playing time In the following example there are 7 tracks lasting a total of 41 minutes 56 seconds If mains power to the unit is switched on with a disc already loaded it will automatically search for the disc The display then indicates STOP and shows the number of tracks available on the CD and total playing time as in the above example DISC PLAY If PLAY PAUSE is pressed the unit will begin playing from track 1 confirm
23. fer to p 14 for advice and tuner functions AUX 1 To use the AUX1 input connect your external source to the AUX1 input see p 8 Pressing the AUX1 button selects the corresponding input On AUX1 you have the option of analogue line level or digital optical coax inputs The unit switches automatically to digital inputs and selects the correct one when a digital signal is present For sources with digital outputs we recommend you use the KW250S digital inputs to take advantage of the up sampling technology AUX 2 To use the AUX2 input connect your external source to the AUX2 input see p 8 Pressing the AUX2 button selects the corresponding input On AUX 2 you have the option of analogue line level rear phono plugs or front 3 5mm jack PDI input The unit switches automatically to digital input for AUX2 when a digital signal is present For sources with digital outputs we recommend you use the KW250S digital inputs to take advantage of the up sampling technology The AUX 2 PDI input is also available at the front of the unit in the form of a 3 4 mm jack PDI Portable Device Input socket to enable personal portable devices such as MP3 players and minidisk walkman to be played thorough the unit TIP For best listening experience using your portable device we recommend you set its outputs for line level Issue 2 19th June 2006 Page 19 of 24 KW250S AMPLIFIER OPERATION
24. ght indicating that the unit is on The feet glow red to indicate speaker outputs are muted for about fifteen seconds so no sound will be heard from your speakers Once the 15 seconds is up the feet glow orange to indicate unit is usable but still warming up At this stage sound output is now available After 30 minutes the feet glow blue to indicate unit is fully warmed up VOLUME The volume control knob to the right of the front panel should be adjusted for normal listening levels Whilst being adjusted the volume setting is shown in the display window The settings range from 0 to 100 in 1dB resolution steps giving about 19db out from the preamp outputs at 100 setting Note to prevent damage to hearing and speakers the switch on volume setting is limited to 50 maximum Please readjust setting after switch on if necessary PHONO INPUT To use the phono input connect your turntable cartridge outputs to the phono input sockets see p 8 Pressing the phono button selects the corresponding input Pressing a second time alternates the input for moving magnet MM or moving coil MC Choose the input that best describes the cartridge type being used You can also select the Phono input by using the remote handset see p 9 but MM MC switching is not available on the remote CD Selects the internal CD player Please refer to p 10 for advice and player functions TUNER Selects the internal tuner Please re
25. hour or so to allow sufficient time for the moisture to evaporate AERIAL ANTENNA For ease of installation a tri band aerial is supplied with the unit This covers the FM DAB II III and L bands and picks up sufficient signal for most domestic purposes However if FM stereo background noise is obtrusive radio text is corrupted or DAB cut out is experienced or unit is to be used in a fringe area a rooftop DAB and FM aerial may be required Please contact an approved aerial contractor with good local knowledge The tri band aerial is plugged into the tri band antenna F connector at the rear of the unit and should be securely fastened by tightening the nut AUDIO CONNECTIONS Outputs Connect your loudspeakers to the terminals on the back panel marked as LEFT and RIGHT SPEAKER outputs Preamp outputs phono sockets are controlled by the volume and source controls This allows connection of a second amplifier for bi amping or increased drive Tape outputs of nominal line level and are constant volume for recording to tape CD R RW or any other recordable format If desired the unit can also be attached to an external DAC of your choice The unit outputs COAX and OPTICAL digital signal stream at 48kHz NOTE The digital output works for CD DAB and FM Inputs The KW250S has three line level inputs and a Phono MM MC input PHONO MM MC AUXI and AUX2 are available at the back for other signal sources A Portable Device In
26. lay If REPEAT is then pressed whilst in shuffle mode a repeat shuffle function is obtained Pressing gt gt I selects the next track in random order SCAN INTRODUCTION The scan introduction function allows play back of just the start of each track on the disc for instance to locate a preferred track by ear Press INTRO on the remote control and if the player has stopped the display will show The first ten seconds approximately of each track on the CD can then be played in sequence by pressing either PLAY PAUSE on the front panel or PLAY on the remote control Press INTRO again to cancel introduction search mode If INTRO mode is cancelled while the KW250S is still playing the remainder of the entire disc will be played PROGRAMMED PLAY The built in program memory allows you to store up to 25 track numbers and then play them back in the held order Each track is stored as a step in the program With the CD loaded and the player stopped first press PROGRAM on the remote control The following is then displayed On the remote control press the numeric button of the track number corresponding to the first track you wish to store number 3 for example That track number will now appear in the display Press PROGRAM again on the remote control the next program step is selected prog 2 and the track number reverts to 0 ready for a new entry DISPLAY Issue 2 19th June 2006 Page 1
27. maged by lightning For protection of your audio system during electrical storms remove the mains plugs and disconnect any aerial lead If after sales service is required to help your dealer identify the KW250S please quote the serial number located on the rear panel of the unit Issue 2 19th June 2006 Page 6 of 24 KW2508S GENERAL INSTALLATION INTRODUCTION Congratulations on the purchase of your new KW250S integrated CD DAB FM PRE and dual mono power amp The KW250S is one of the most comprehensive fully integrated Hi Fi designs ever made and encloses the best elements out of all our separates into one convenient box The CD player has extremely low jitter vanishingly low distortion exemplary linearity and ultra low noise The tuner is designed to bring DAB into the realms of hi fidelity sound reproduction to complement the very latest technology DAB FM receiver circuit Great attention has been paid to internal layout isolating each circuit section to prevent possible interaction The CD DAB and FM digital data streams are first up sampled to 192kHz which moves noise jitter and distortion artefacts well above the audio band They are then passed through a new low noise low distortion 24 bit dual differential digital to analogue converter which allows simpler filtering of the analogue output This in turn gives an improved audio response without the need for sharp filters that degrade sound quality The
28. nd held for more than a second the tuner will scan back down the band to the previous station the scan down function is not available on the remote BAND This button alternates the tuner between receiving FM and DAB stations TUNE UP DOWN To manually tune to a station simply turn the left hand knob to cycle through the FM band Turning slowly gives fine tuning steps 50kHz When the required station frequency is displayed the station should be heard and after a few seconds radio text information is displayed if available Hricbic j See the section on the PRESET buttons to store favourite stations for easy recall PRESET UP and PRESET DOWN PRESET UP DOWN buttons are used to select one of ten FM preset memory locations Press select when the desired preset is displayed STORE It is possible to store favourite stations in preset memory locations using the STORE button as follows Tune to the station required Press PRESET UP DOWN buttons until the desired preset is displayed Press and hold STORE to accept this preset The display will indicate the preset has saved Note this will overwrite any station stored previously on this preset Briefly pressing the button will display current preset without storing There are 10 presets available for programmes on the FM band in addition to the 10 provided for DAB Presets are remembered even if the unit is switched off MONO STEREO remote o
29. nly This button enforces mono reception when inadequate aerial signal strength results in noisy stereo reception MONO forces mono at all times until the button is pressed again for AUTO In AUTO mode the tuner automatically switches according to signal strength INFO Displays the current broadcast information in the following order PI Programme identification PTY Programme type RT Radio text CT Clock date and time as transmitted by network MS Music Speech info only DI Decoder information Signal Strength with bar graph Audio mode AF Alternate frequency Returns to top of this list Relies on FM RDS Not displayed if no or insufficient RDS signal MENU FM options Press MENU to access menu options whilst in FM mode Use the TUNE up down knob to cycle through the options and the SELECT button to choose displayed option Menu options available for FM are System reset RESETS all presets and tuning to 87 50MHz beginning of FM Band Customer Version Current software version Issue 2 19th June 2006 Page 16 of 24 KW250S Basic problem solving with a tuner is similar to troubleshooting other electrical or electronic equipment Always check the most obvious possible causes first such as the following examples No power when POWER button is Mains power plug is not inserted Plug in securely pressed fully into rear socket No audio output Mute function is still selecte
30. put PDI 3 5mm stereo jack is provided at the front which is shared with the AUX1 rear inputs This allows easy connection of a portable player Two digital inputs AUX 1 optical and coax AUX 2 coax only cater for digital sources that would benefit from the KW250S s up to date DAC circuits Use these inputs for better quality from mini disc DAT or MP3 for enhanced sound quality NOTES ON USING COMPACT DISCS Always hold discs by the edges and make sure they remain clean do not touch the surface Keep discs away from direct sunlight and heat sources such as radiators Clean discs with a cloth before playing them but do not use solvents such as benzene thinners or antistatic spray intended for analogue records After playing always return the disc to its case for storage CLEANING Before cleaning the unit switch off power at the mains switch and remove the mains plug from the wall socket Clean the cabinet and remote control unit using a moist cloth We do not advise using solvents white spirit or thinners as they could damage the surface finish Issue 2 19th June 2006 Page 7 of 24 KW250S FACILITIES AND CONNECTION FRONT PANEL MUSICAL FIDELITY kW 2505S 1 DAB FM Tuning knob
31. t batteries correctly Batteries are flat Change batteries for a new set Remote control is not pointed directly towards the front panel of the player Ensure there is no obstruction between the remote control and player front Remote control range has greatly reduced Batteries are running out Change batteries for a new set dealer or Musical Fidelity service agent Remember the most vulnerable part of a CD playing system is the disc itself The most likely cause of a disc not playing is that the disc itself is faulty scratched or simply dirty Never open the case of the unit yourself as this will invalidate the guarantee If none of the above actions affect a cure please contact your Issue 2 19th June 2006 Page 13 of 24 KW2508S DAB FUNCTION BUTTONS DAB TUNER BUTTONS Press TUNER under AMPLIFIER heading to select the internal DAB FM tuner Note Whenever the power is turned ON the station you were previously receiving will be selected automatically The name of the station appears in the display All settings and stored stations will be retained in memory while the unit is turned off On selection the last band DAB FM and station is remembered BAND This button alternates the tuner between receiving DAB and FM stations AUTO TUNE To update your tuner with locally available DAB stations Press the AUTO TUNE button The tuner will search through all the ens
32. t impedance Frequency response Channel separation Signal noise ratio Total harmonic distortion DAB Specifications Supported DAB modes VHF sensitivity L Band sensitivity L band after error correction Band III after error correction Adjacent Channel Selectivity Far off selectivity Acquisition sensitivity Input Impedance FM Specifications RF Frequency Range RF Sensitivity S N N 26dB 90MHz 22 5KHz RF Limiting Sensitivity S N N Ultimate s n ratio THD Stereo Channel Separation RDS data WHIP AERIAL Operating Frequency Gain FM amp Band III L Band Impedance S W R Polarization Connector Operating temperature Storage temperature Length Mechanical Fixing Issue 2 19th June 2006 CD DAC amp TUNER SPECIFICATIONS Philips lt 135 pS 24 bit Delta Sigma Bit stream dual differential 8x over sampling 192 kHz lt 135 pS lt 0 1dB down to 96dB 2 15VRMS at 1 kHz nominal 47 Ohms 10Hz to 20 kHz 0 2dB max gt 105dB 20Hz to 20 kHz gt 113dB A weighted lt 0 003 10Hz to 20 kHz I II II and IV VHF 174 240 MHz RF frequency range L Band standard and Canada 1452 1492 MHz 96 97 dBm Measured to EN50248 95 96 5 dBm Measured to EN50248 15 dBm Maximum Input Signal for Pseudo channel BER with real value 0 02 0 dBm 32 33 dBm 48 dBm 101 dBm 50Q F type connector to VHF L Band diplexer Measured to EN50248 Measured to EN5024845 87 5 108 MHz 5 uV
33. the button will display current preset without storing There are 10 presets available for programmes on the DAB band in addition to the 10 provided for FM Presets are remembered even if the unit is switched off MONO STEREO remote only This button has no function when in DAB mode Issue 2 19th June 2006 Page 14 of 24 KW250S DAB FUNCTION BUTTONS INFO Displays the current broadcast information in the following order DAB programme text Music Type Network name Date and time as transmitted by network Transmission mode and bit rate Ensemble and frequency Signal Strength Returns to top of this list MENU DAB options Press MENU to access menu options whilst in DAB mode Use the TUNE up down buttons to cycle through the options and the SELECT button to choose displayed option Menu options available for DAB are Manual Tune Allows manual search of ensembles and DAB frequencies Canadian L band Enables Canadian L Band European L Band Enables European L band Service Base Factory use only Customer Version Software version reference System reset RESETS all presets and performs a new scan of DAB band Issue 2 19th June 2006 Page 15 of 24 KW2508S FM FUNCTION BUTTONS AUTO TUNE To auto search stations press the AUTO TUNE button The tuner will search upwards through the FM band and pick out the next station for you If pressed a
34. w must be connected to the terminal in the plug which is marked with the letter E or coloured green or green and yellow or by the earth symbol mala The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black If connecting to a BS1363 plug a 13 amp fuse must be used Q 5 Qo Qa S a lt 2 to z gt WARNING ANY MODIFICATIONS TO THIS PRODUCT NOT EXPRESSLY APPROVED BY MUSICAL FIDELITY WHO IS THE PARTY RESPONSIBLE FOR STANDARDS COMPLIANCE COULD VOID THE USER S AUTHORITY TO OPERATE THIS EQUIPMENT Issue 2 19th June 2006 Page 3 of 24 KW250S CLASS 1 LASER PRODUCT The KW250S incorporates a CD player which has been designed and manufactured according to FDA regulations title 21 CFR chapter 1 sub chapter J based on the Radiation Control for Health and Safety Act of 1968 and is classified as a Class 1 laser product There is no hazardous radiation during normal use because invisible radiation emitted inside this product is completely confined within the protective housing However you must observe the following important warnings CAUTION THIS CD PLAYER USES INVISIBLE LASER LIGHT WHEN THE PLAYER OPERATES LASER LIGHT IS RADIATED INTERNALLY DO NOT REMOVE THE PROTECTIVE HOUSINGS USE OF CONTROLS OR ADJUSTMENTS OR
35. w ones Do not mix old and new batteries two are required size AAA LRO3 or SUM 4 Please dispose of used batteries in accordance to local regulations Tuner Buttons INFO To access broadcast information MENU to choose options AUTO TUNE finds previous next broadcast i MONO STEREO Option for weaker FM stations Amplifier Buttons PHONO Selects Phono input CD Selects internal CD TUNER Selects internal tuner AUX 1 Select source AUX 1 AUX 2 Select source AUX 2 PDI CD Buttons TIME Displays Track Time Time remaining 0 9 Buttons Used to select track numbers l CHECK Check pre programmed tracks l PROGRAM Programs selection and order of tracks INTRO Player plays first 10 seconds of each track l REPEAT Repeats whole disk or selected tracks SEARCH Fast forward backward through track STOP Stop playing Eject CD Issue 2 19th June 2006 DAB TUNER AUTO INFO MENU TUNE BAND MONO STEREO STORE SELECT A PHONO CD PRESET TUNE e S TUNER AMPLIFIER AUX 2 MUTE VOLUME DISPLAY 8 PROGRAM REPEAT A B SHUFFLE 4 b gt gt gt bbi STOP a a il gt CD PLAYER MUSICAL FIDELITY KV 2505S _ BAND Selects DAB or FM STORE Stores station as preset SELECT To choose preset DAB i station PRESET 7 selects preset TUNE steps up down band MUTE Mutes unit until pr
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