Abbingdon Music Research CD-77 User's Manual
Contents
1. 1a Unpacking 12 1b Setup 13 Section 2 Component Overview 15 2a Start Up 19 Section 3 Advanced Features 29 3a OptiSample 29 3b DAC Input 31 3c IR Link 31 3d Crowbar Muting Circuit 31 3e OptiMains Protection for Excessive Under Over Voltages 32 Nbbingsdon STen Frescarch Section 4 Technical Features Appendix Troubleshooting amp Maintanence Troubleshooting Maintenance Specifications 33 34 34 35 37 Section 1 Unpacking and Setup Arvoingson Maic research Figure 1 1 Front Panel of the CD 77 r j J PE E JZZ Fe Ei L Le 7 gt l SENS l l l aaa i eS a 11 Nbbingson STen Frescarch Thank you for purchasing this AMR reference class component We hope you derive as much pleasure from using this component as we have enjoyed making it for you 1a Unpacking This section refers to the unpacking of the CD 77 and its subsequent setup Upon unpacking please find i CD 77 Reference Class Compact Disk Processor ii Aluminium CD puck Pleaseicheek that iii RC 77 Remote Commander with 2 x AAA batteries all contents are iv PC 77 OptiLink Reference mains power cable present v IC 77 OptiLink Reference interconnect cable R2. After start up pressing the STANDBY button F1 on either the front fascia or the RC 77 RCS the CD 77 will switch to STANDBY mode By pressing this button again the CD 77 will commence warm up to prepare for operation Under STANDBY mode power to CD 77 s digital circuit is kept active in order to provide the optimum per formance for the next listening session However power to the valves will be switched off to preserve valve life 3 Loading Autoplay To play a compact disc slide back the top loading CD door Remove the CD puck and place the compact disc in the large circular recess in the well with its transparent playing surface facing down The label side of the compact disc MUST face UP Replace the CD puck in the center and close the lid Make sure the CD puck is correctly centered and positively engaged Close the CD door so that the CD 77 is able to scan the compact disc s TOC Table of Contents and display the total number of tracks and playing time Always use the CD puck Nbbingson Mhlasic Frescarch Upon closing the door play will automatically commence from Track 1 This Autoplay feature can be enabled disabled by simultaneously pressing the STOP button F5 on the front fascia of the CD 77 and pressing the PLAY PAUSE button RC8 on the RC 77 remote control NOTE The CD 77 has been designed to play all types of compact discs including the CD layer of hybrid SACD s However as such discs are thicke
3. No User Serviceable Components Inside For service contact your Authorised Dealer or Distributor Any modifications to this equipment will void all warranties DANGER invisible laser radiation when opened and interlock failed or defeated Avoid direct exposure to beam CAUTION use of all controls adjustment or performance of procedures other than specified herein may result in hazardous radiation exposure WA R N N G S Nbbingson PAu sic Preesearch The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying this component This component weighs over 35 kilograms Do not place this component on an unstable cart stand tripod bracket or table as the component may fall causing serious injury to a child or adult and serious damage to the unit An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause the component and cart combination to overturn Any mounting of the device on a wall or ceiling should follow the manufacturer s instructions and should use a mounting accessory recommended by the manufacturer Read and follow all the safety and operating instructions before connecting or using this component All warnings on the component and in its operating instructions should be adhered to Retain this Owner s Manual for fu
4. e batteries in remote control handset have expired e object obscuring remote sensor on the CD 77 no line of sight e loose cable connections Abingdon Musie vessar Appendix Troubleshooting amp Maintanence Solution e clean the CD disc e replace with a proper CD disc e clean the CD disc e replace CD puck properly e insert the power plug firmly into the AC e change mains plug fuse e ensure the CD 77 is correctly connected e ensure input selector on the amplifier is set to desired source for the CD 77 e replace batteries e remove any objects directly in front of the CD 77 e re attach the loose cables correctly e go to the Contents section and re trace the procedure or contact your nearest AMR distributor dealer Nbbingson STen Frescarch Maintenance i About the Optical Pickup The CD 77 uses a solid state semi conductor diode laser mounted on a tracking servo mechanism to play the disc The laser illuminates the track of microscopic pits representing the digital data bits while photo diodes detect the reflected illumination from the disc and convert it into an electronic signal which is then decoded to recover the musical waveform in each stereo channel It is not possible to see the laser operating because it operates at wavelength of 7800 Angstroms which is in the infrared and thus invisible to the human eye The compact disk processor is completely safe for children to use The laser operates at ve
5. Optisample modes RCI BRIGHTNESS button to switch between 4 different brightness levels including display off RC12 TIME button to alternate between the display of current track or time remaining RCI3 PROGRAM button to program an order of playback RCI4 SCAN button to commence a 10 second or 30 second scan of each track RC15 SHUFFLE button to select random shuffle of music tracks NOTE Please refer to Section 3 Advanced Features for a detailed explanation 18 Once powered OFF always wait 20 seconds before switching on again Nbbingsdon STen Frescarch 2 Start Up 1 Power On Off Press the POWER switch R5 at the rear of the CD 77 to switch mains power ON to the CD 77 To switch the mains power OFF press again and release Always WAIT at least 20 seconds before switching on again This is to enable the OptiMains circuit to shutdown properly The display will light up to indicate the unit is switched on and ready for use This should take just under 1 minute as the OptiMains circuit is verifying the incoming mains and the CD processor is warming up The display should flash the message it will then change to The display will then countdown the remaining warm up time Once the OptiMains circuitry has completed its initiation process the CD 77 is ready for operation 19 Nbbingsdon Mhlasic Frescarch Standby will maintain power to the non valve circuitry 20 2 Standby
6. interconnects R3 USB Input for the connection of a USB signal input R4 INFRA RED Link for the connection of a wireline remote control R5 POWER Switch to switch on mains electricity to the CD 77 R11 IEC power connector for the connection of PC 77 mains power cable to the CD 77 Please refer to Section 3 Advanced Features for a detailed explanation 16 Nbbingsdon Mhlasic Frescarch Figure 2 3 RC 77 Remote Control RC 77 battery installation To install the 2 x AAA batteries using a Philips screwdriver remove the four screws at the four corners of the rear bat tery compartment Install the 2 x AAA batteries in the correct direction accord ing to the baseplate inside the battery compartment Replace the battery compartment and the four cover screws 17 Nbbingsdon Mhlasic Frescarch RCI RC2 RCS RC4 RCS RC6 RC7 RCS RC9 Numeric Pad to enter track selections REPEAT button to select a repeat mode A B button to select an excerpt from a track for repeat DAC button with a USB connection made to bypass the transport and enter DAC mode STANDBY button to place the CD 77 in active or standby mode REV REVERSE button to fast reverse or select the previous track STOP button to halt stop play PLAY Pause button to commence playback or to pause playback FWD NEXT button to fast forward or select the following track RCI0 SAMPLING button to cycle through the 6 different
7. Am Nbbingdon AT air Peesecarch CD 77 Reference Class Compact Disk Processor Owner s Manual Nbbingdon STen Frescarch Nbbingson STen Frescarch FCC Declaration of Conformity United States only This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation FCC WARNING Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reori
8. CA type vi CD 77 Owner s Manual vii Quick Start Card viii AMR Warranty Card ix AMR System Test Disk x Aluminium professional flightcase Please ensure that all items are present Should an item be missing please contact your AMR distributor dealer 12 Nbbingdon STen Frescaurch 1b Setup The following diagram graphically illustrates the standard connection of the CD 77 in a two channel system Figure 1 3 CD 77 System Setup CD 77 AM 77 LS 77 System connec Speaker R Speaker L tion using XLR connectors Interconnect Cable 13 Arvvingcdon STen FRrescarch Optional IC 77 XLR type interconnect can be purchased separately 14 i Unpack the CD 77 and remove the protective foam insert inside the CD well ii Remove the protective sheet from the acrylic front panel iii Ensure the CD 77 is located on a level and solid surface capable of supporting at least 50 kgs iv Using the spirit level located inside the CD well check the CD 77 is on a level platform Connect the IC 77 RCA type interconnect via the left blue white and right red leads to the respective channels at the rear of the CD 77 x vi Connect the other end of the IC 77 s left and right channels to the respective inputs of the ampli fier Ensure that the correct colour coding is adhered vii Connect the IEC end of the PC 77 mains power cable to the mains receptacle of the CD 77 and connect the mains plug into a main
9. ality due to a shift in the harmonic spectrum as a result of the complex number which underlies the scaling 6 Upsampling at 192kHz this mode engages the Upsampler with a sampling frequency of 192kHz per forming a very large degree of digital manipulation The original data from the CD is in effect discarded and re placed with a re calculated version This new version of the music is non linearly scaled up using a complex number as scaling factor and resolution edge enhanced The sonic result of 192kHz upsampling is similar to 96kHz upsampling However as the complex numbers that underlie the upsamplings are different to oversam pling the shift in the harmonic spectrum is not the same hence tonality is somewhat different An S PDIF link was not offered as this method results in exces sive sonic degradation Crowbar Muting Ciruit when not required is out of the signal path Nbbingson STen Frescarch 3b DAC Input It is possible to allow playback of a large library of music to an exceptionally high standard through the CD 77 s DAC option See Section 2 item 12 for connection details Under the DAC mode the DAC section of the compact disk processor will disengage from the transport section Instead the digital signal from the USB input R3 located at the rear of the CD 77 will be used as the music signal source It is worth noting that the isosynchronous USB connection used in the CD 77 because of the almost negligible in
10. arise where fluctuations in the main elec tricity exceeds that of a correctly operating mains supply and any electrical item product is no longer properly served In the case of extreme power surges brown outs or other exceptional unexpected conditions that ex ceed the safety margins the OptiMains system will automatically switch off the mains power to the internal parts of equipment to prevent any damage from occuring If the display reads Power OFF the AMR component and wait at least 5 minutes If and when the mains electricity has been deemed to have returned to normal such as during a brown out and the lights have dimmed but have returned to normal brightness then power up your AMR component as per the manual s instructions Section 4 Technical Features Arvvingsion Music research The following section provides a brief explanation of the most salient technical features of the CD 77 The original Philips TDA1541A digital to analogue converter in AMR s testing and auditioning remains to date the most musically satisfying chipset for digital to analogue conversion OptiSignal conditioning circuit has optimised every single operating parameter of the Philips TDA1541A including off as well as onboard circuits OptiSample digital engine is AMR s incorporation of the most advanced digital filter yet the Digital Signal Processing DSP engine from Texas Instruments OptiClockLock system ensures all the clocks in the CD 77 a
11. benchmark for playback Section 3 i Advanced Features Nbbingsdon STen Frescarch The following section describes and where relevant provides instructions to access the CD 77 s advanced features 3a OptiSample The CD 77 Compact Disk Processor offers 6 user selectable methods of Sampling that can be cycled through during playback by pressing the OptiSample button RC10 on the RC 77 The sampling options are 1 Digital Master I this mode directly takes the data extracted from the CD and re clocked to generate the music signal Due to the complete lack of digital or analogue filtering the treble frequencies are slightly rolled off making the sound somewhat soft and laid back For the same reason the mid range and below is very natural and realistic The reproduction of impulses is undistorted This mode often helps to tame overly bright recordings 2 Digital Master II default this mode is identical to Digital Master I but complements this with a special analogue filter which corrects the roll off in the treble frequencies As a result the tonality is more accurate in the treble We therefore recommend this mode as the benchmark with which to enjoy music 3 Oversampling 2x this mode engages the Digital Filter with an oversampling factor of 2 thus performing the least digital processing possible except for no digital processing The original data from the CD is in effect discarded and re placed with a re c
12. ent or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Canadian Notice Avis Canadien Class B Equipment This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe B respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada Arvringcdon Mhlasic Frescarch CE This products complies with the EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC issued by the Commission of the European Community Compliance with these directives implies conformity to the following European Norms in parentheses are the equivalent international standards and regulations o EN55022 CISPR 22 Electromagnetic Interference o EN55024 IEC61000 4 2 3 4 5 6 8 11 Electromagnetic Immunity o EN61000 3 2 IEC61000 3 2 Power Line Harmonics o EN61000 3 3 IEC61000 3 3 Power Line Flicker o EN60950 IEC60950 Product Safety Laser Safety This CD player has been designed and manufactured according to FDA regulations title 21 CFR chapter 1 subchapter J based on the Radiation Control for Health and Safety Act of 1968 and is classified as a Class 1 laser product CLASS 1 LASER PRODUCT
13. fast forward until the button is released 8 REV Reverse At any time pressing REV F2 once on either the front fascia or the RC 77 RC6 the previous track will be selected By holding down REV F2 or RC6 playback will reverse until the button is released 9 Numeric Pad RC 77 only This encapsulates the numbers 0 9 on the numeric pad By pressing any combination of the numeric keys a desired track may be selected directly For example to select Track 2 press 2 to select Track 21 press 2 and then 1 Nbbingson STen Frescarch 10 Repeat RC 77 only If the REPEAT button RC2 is pressed once will be displayed and the current track will be repeated If the REPEAT button RC2 is pressed AGAIN will be displayed once the last track of the compact disc has been played instead of stopping the CD 77 will revert to Track 1 11 A B RC 77 only The A B button RC3 is for the manual selection of a chosen piece of music within a track for repetition When the A B button RC3 is pressed once 23 Nbbingsdon Mhlasic Frescarch 24 will be displayed with the letter B flashing This means that it has commenced the selection of that passage of music By pressing the A B button RC3 again will be displayed with the letter B no longer flashing This is to confirm the particular passage of music has been identified and repeat will commence To cancel this program press t
14. from Digital Master I through to Upsampling at 192kHz See Section 3 Advanced Features for a detailed explanation 14 Brightness RC 77 only The BRIGHTNESS button RC11 allows for the adjustment of the display on the front fascia of the CD 77 There are 4 different brightness settings including display off With a separate power supply the display has no impact upon the sonic performance 25 Nbbingsdon STen Frescarch 26 15 Time RC 77 only Normally the display will show the time elapsed since the beginning of the current track but pressing the TIME button RC12 on the RC 77 the display will show and cycle through 16 Scan RC 77 only Press the SCAN button RC13 once will be displayed and the first 10 seconds of every track will be played before moving onto the next track until all tracks have been played Arvringcdon STen Frescarch By pressing the SCAN button again will be displayed and the first 30 seconds of every track will be played until all tracks have been played 17 Program RC 77 only Press the PROGRAM button RC13 and will be displayed Thereafter select the track via the numeric keypad RC1 will then be displayed and the same routine is repeated To commence playback press PLAY PAUSE RC8 27 Arbringcdon STen Frescarch 18 Shuffle RC 77 only Press the SHUFFLE button RC15 and the playback of music tracks will be randomly selected 28 Digital Master II is the
15. he A B button RC3 again 12 DAC Input RC 77 only The DAC button RC4 is for the replay of music on the CD 77 from music stored on a computer hard drive via a USB to USB cable connection To establish the connection between the CD 77 and the hard disk source i Power ON the CD 77 il On the RC 77 press the DAC button RC4 to place the CD 77 in DAC mode iii Power ON the personal computer iv Connect the USB cable between the CD 77 and the personal computer Nbbingson STen Frescarch v Go to Control Panel gt System gt Hardware gt Device Manager In Device Manager wait until the personal computer in Hardware has recognised the CD 77 as a USB Audio Device This is found under the Sound video and game controllers category vi Go to Control Panel gt Sounds and Audio Devices gt Audio Make sure USB Audio Device is selected as the default device under the Sound playback box vii Select and playback music on the personal computer using suitable software Apple iTunes Foobar Winamp Windows Media Player Windows Media Center et al 13 OptiSample RC 77 only With or without a compact disc playing if the OPTISAMPLE button RC10 is pressed the current sampling method the default is Digital Master II will be displayed for 3 seconds Within this timeframe press again to cycle through each of the 6 different sampling methods
16. ingsdon Mhlasic Frescarch horizontal position only Do not place heavy objects on the component Keep the component and compact discs away from equipment with strong magnets such as microwave ovens or large loudspeakers To prevent fire or shock hazard do not place vessels filled with liquids such as vases on the component Touch Sensitive Buttons On the front fascia of this AMR component are touch sensitive buttons Due to the wide variance of climes around the world instances may arise where to activate a button the touching finger may be required to be in contact with both the button and the front fascia to register the touching finger may have to touch the chassis to discharge any static electricity prior to button selection Running In AMR estimates that the CD 77 may take between 300 500 operating hours for all of the internal components to be fully broken in Please anticipate the sonic performance of the CD 77 to settle only after it has been used for this approximate length of time Stand By Please note that the solid state section needs to find its equilibrium and due to the unavoidable use of electro lytic capacitors and an effect called soakage around 24 48 hours of standby or operation are required to stabilise performance Therefore standby does not shut down the solid state sections only the valves Arvringcdon Mhlasic Frescarch Contents WARNINGS 5 Section 1 Unpacking and Setup 11
17. ll dust particles a few light fingerprints or slight scratches But large scratches or a thick layer of oily fingerprints can prevent the CD 77 from tracking the disc properly Incidentally although the tracking optical pickup plays the disc through its clear side the actual data surface is embedded directly beneath the label protected only by a very thin coating of lacquer So a scratch that cuts through the label may damage the disc more than a similar scratch on the transparent playing surface Thus you should treat both surfaces of the disc with care Severe scratches or fingerprints may cause the CD 77 to miss track skipping ahead or repeating the same passage Less severe damage may produce very brief bursts of high frequency noise The tracking and error correction circuits of this compact disc processor player are unusually sophisticated providing secure tracking of flawed discs that are unplayable on some other players Nevertheless the discs should not be abused or handled carelessly For best results grasp the disc only by its edges Specifications Arvringcdon STen Frescarch Figure S 1 Specifications Table Transport Disk Drive Operation modes Digital Audio Inputs Analogue Outputs Thermionic Electron Valves Toploading proprietary AMR transport mechanism e Direct Master I no digital or analogue filter e Direct Master II no digital filter anti sin x x analogue filter e Oversam
18. omputed version This new version of the music is mainly linearly scaled up using a whole number as scaling factor and resolution edge enhanced The sonic result of oversampling mirrors those of resolution enhancement in digital photographs more apparent detail is noticeable However impulse reproduction is slightly distorted leading often to a slight perception of an edginess or graininess 4 Oversampling 4x this mode engages the Digital Filter with an oversampling factor of 4 performing quite 29 Arvvingcdon STen FRrescarch OptiSample modes 4 6 offer more typical versions of digital playback 30 a large degree of digital manipulation The original data from the CD is in effect discarded and re placed with a re calculated version This new version of the music is mainly linearly scaled up using a whole number as scaling factor and resolution edge enhanced The sonic result of Oversampling 4x is similar to that of Oversampling 2x except more accentuated 5 Upsampling at 96kHz this mode engages the Upsampler with a sampling frequency of 96kHz performing quite a large degree of digital manipulation The original data from the CD is in effect discarded and re placed with a re calculated version This new version of the music is non linearly scaled up using a complex number as scaling factor and resolution edge enhanced The sonic result of upsampling is similar to oversampling however there are subtle degrees of change in the ton
19. pling 2x e Oversampling 4x e Upsampling 96kHz e Upsampling 192kHz 1 x USB interface 1 x RCA 1 x XLR per channel ECC81 12AT7 NOS amplification stage 5687 6900 NOS output buffer stage EZ80 6CA4 NOS rectifier stage 37 Nbbingsdon STen Prescarch 38 Output voltage Digital Full Scale Output Impedance Frequency Response Signal to noise ratio A Weighted Total Harmonic Dist Noise THD N Dynamic range Channel separation Power consumption Power on Rated voltage Colour gt 2V lt 1500hm 20Hz to 20 kHz 0 0 0 5dB gt 100dB lt 0 3 gt 90dB gt 90dB Standby 45 W 90W 90V 135V amp 190V 260V AC Champagne or Titanium Arvringcdon STen Frescarch Dimensions 17 9in W by 6 2in H by 18 3in D 46cm W by 16cm H by 47cm D 62 cm W by 30cm H by 78cm D shipped Weight CD 77 62 Ibs 28 kg Shipped 107 1bs 49 kg Unless specified otherwise the Specifications apply to the 4 x OverSampling mode and a Digital full scale signal using IHF loading Information and specifications subject to change without notice Abbingdon Music Research is a subsidiary of the Abbingdon Global Group 22 Notting Hill Gate London W11 3JE United Kingdom Tel 44 0 870 420 5505 Fax 44 0 700 596 1065 39
20. r please ensure the CD puck is positively engaged with the spindle We do not recommend the placement of any type of damping disc on top of a compact disc 4 Display The display provides information about playback status and the optical pickup s location on the compact disc 5 Play Pause Once the compact disc has been correctly placed in the CD 77 press PLAY PAUSE F3 on either the front fascia of the compact disk processor or on the RC 77 RC8 to commence playback During playback at anytime pressing PLAY PAUSE again on either the front fascia or the RC 77 playback will be paused To resume playback press PLAY PAUSE once more When the recording was made on the compact disc it was segmented into numbered tracks Typically each numbered track will correspond to a different song symphonic movement etc These track numbers are iden tified on the CD package and are encoded in the disc by its manufacturer As a result the display will automat ically illustrate the current track number and the elapsed time of a particular track or other time indications as selected via the remote control 21 Nbbingson STen Frescarch 22 6 Stop At any time pressing the STOP button F3 once on either the front fascia or the RC 77 RC7 will halt playback 7 FWD Next At any time pressing FWD F4 once on either the front fascia or the RC 77 the next track will be selected By holding down FWD F4 or RC9 playback will
21. re purposely synchronised to one temperature compensated low jitter master clock module with its dedicated power supply OptiDrive transport mechanism ensures reading of the compact disk is virtually without errors or jitter OptiReg digital power supply is the employment of 14 different but specifically designed regulators that combine to virtually eliminate digital noise OptiValve analogue output stage uses NOS valves in dedicated circuits for the amplification rectification and output stages OptiMains will ensure the correct voltage is always supplied to the relevant internal sub sections OptiTrans power supply transformers are advanced double C Core types which sonically are superior to R Core and comprehensively outclass traditional EI and toroidal transformers For a more detailed explanation of these and other features please go to www amr audio co uk 33 34 Figure A 1 Troubleshooting Guide Symptom Disc Error or No Disc is shown Disc spinning erratically No power when the power button is set to ON No sound Remote control does not work A humming sound can be heard Other problems Possible cause e dirty or heavily scratched CD disc e wrong disc type e dirty or heavily scratched CD disc e CD puck improperly attached e poor or no power plug connection at power point e blown fuse at mains plug e incorrect audio cable connections e incorrect CD 77 operation
22. ry low power and is concealed within the CD 77 s mechanism Even when the CD 77 is disassembled the laser remains sealed within an optical system that causes its light to focus only 1 millimetre from the lens and then diverge rapidly reducing its intensity to negligible levels CLASS 1 LASER PRODUCT No User Serviceable Components Inside For service contact your Authorised Dealer or Distributor Any modifications to this equipment will void all warranties ii Factors that affect Playability The quality of the compact disc itself and that includes the fact there should not be too many scratches on the surface Generally speaking CD R amp CD RW blanks from well renowned companies give better results than unbranded ones The quality of CD recorder or computer CD re writer some recorders and writers produce better results than others Although the CD R amp CD RW is typically created using high speed writing in general the quality of aCD R amp CD RW is better when recorded at a lower speed against a higher speed on the same recorder or re writer 35 Nbbingsdon Mhlasic Frescarch 36 iii CD R amp CD RW Audio Discs The CD 77 can play CD R amp CD RW audio discs that have been recorded on a computer or CD recorder The quality of CD R amp CD RW audio discs varies widely which may affect playability iv Handling Compact Disks Always handle Compact Discs with care The playback of a disc will not be impaired by sma
23. s socket power source Transporting Moving the CD 77 Prior to any transportation novement ALWAYS replace the protective foam insert inside the CD well Without this the CD door sensor may be knocked out of position due to the heft of the CD door moving in transit IF the protective foam insert has been misplaced use sellotape to rigidly hold the CD door open prior to transpor tation Section 2 Component Overview A bbingdon Maaie Mrenearch Figure 2 1 CD 77 Front Fascia E pe COMPACT DISK PROCESSOR a C aaa A RW F4 F1 STANDBY button to place the CD 77 in active or standby mode F2 REV REVERSE button to select the previous track fast reverse F3 PLAY PAUSE button to initiate playback pause once a compact disk has been correctly loaded F4 FWD NEXT button to select the following track fast forward F5 STOP button to halt stop play 15 Nbbingsdon Phlasic Frescarch Figure 2 2 CD 77 Rear Panel bbingdon Music research Compact Disk Processor CD 77 Designed and Engineered in Great Britain j CLASS 1 J j LASER PRODUCT A S j A USB Input AC IN 90V 135V 190V 260V RI RCA Outputs for the connection RCA interconnects R2 XLR Outputs for the connection of XLR
24. tions This equipment has been tested and found to comply with the limits set out in the EMC Directive using a connection cable shorter than 3 metres On power sources The mains power cable should be routed so that it is not likely to be walked on or pinched especially near the plug or back panel receptacle The component should not be disconnected from the AC power source as long as it is connected to the wall outlet even if the component itself has been turned off If this component is not going to be used for a long time be sure to disconnect the component from the wall outlet To disconnect the AC power cable grasp the plug itself never pull the cable CAUTION On placement Just like a thermionic electron valve amplifier with a compliment of 6 valves the CD 77 will become warm during operation This is normal Given this it is imperative that the installation of the CD 77 DOES NOT interfere with its proper ventilation For example it should not be situated on a bed sofa rug or similar surface that may block the top or bottom ventilation openings or placed in a built in installation such as a bookcase or cabinet that may impede the flow of air through its top and bottom ventilation openings Do not place the component in a location near heat sources or in a place subject to direct sunlight excessive dust or mechanical shock Do not place the component in an inclined position It is designed to be operated in a 7 Nbb
25. troduction of jitter offers a sonic performance that is virtually indistinguishable from CD playback via the integral transport 3c Infra Red Link When using the CD 77 as part of a Home Theatre system it is possible to connect a wireline remote control cable to the IR link R4 The CD 77 will become slaved to the remote control operation of the Home Theatre system 3d Crowbar Muting Circuit During switch on and standby resume operation the output of the CD 77 is muted turned off in order to prevent any audible thumping noises during this period Unlike the commonly used muting switches or transistors which are connected in series with the music signal AMR has employed a relay which shunts across the output a crowbar circuit As a result the muting circuit is completely removed from the path of the music signal when not needed yet when engaged offers complete protection for any equipment connected to the CD 77 31 Nbbingsdon PMhlasic Frescarch In the event there are excessive mains fluctua tions OptiMains will detect and protect 32 3e OptiMains Protection for Excessive Under Over Voltages The CD 77 is fitted with the OptiMains system to condition and adjust the incoming mains supply for the best operation under all normal mains conditions including situations that will cause audible problems without Opti Mains With almost every country throughout the world instances inevitably
26. ture reference Do not use this unit near water for example near a bath tub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool Unplug the component from the wall outlet before cleaning Never use benzine thinner or other solvents for cleaning use only a soft damp cloth Nbbingsdon STen Frescarch Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through any openings This component should be serviced only by qualified AMR service personnel when A The power cable or the power input socket has been damaged B Objects have fallen or liquid has been spilled into the component C The component has been exposed to rain or liquids of any kind D The component does not appear to operate normally or exhibits a marked change in performance E The component has been dropped or the enclosure has been damaged DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF REFER SERVICING TO QUALIFIED AMR SERVICE PERSONNEL Upon completion of any servicing or repairs request the service point s assurance that only AMR Authorised Replacement Parts with the same characteristics as the original parts have been used and that the routine safety checks have been performed to guarantee that the component is in a safe operating condition REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN FIRE ELECTRIC SHOCK OR OTHER HAZARDS Nbbingsdon Mhlasic Frescarch Precau
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