Marantz-CD400B-dd-om维修电路原理图.pdf

RadioFans.CN 收音机爱 好者资料库 v Model CD-400B CD-4 .alll . Disc Demodulator - MARANTZ CO;, INC. P.O. BOX 99 SUN VALLEY, CALIFORNIA 91352 A WHOLLY-OWNED SUBSIDIARY OF SUPERSCOPE INC., SUN VALLEY, CALIFORNIA 91352 RadioFans.CN 收音机爱 好者资料库 WARRANTY Marantz: Company. Inc., proudly warrants YO!- Ma.ntt product to .befree ofmanufaeturing defects inmateriafand workman,ship as follows: . From .date, of purchase . . . PARTS 3 Electronic Components and. Receivers .LABOR _ years Syears PARTS 3 years .eadphones LABOR, 3years PARTS. 3 years 4-Channld-Remote Control LABOA- . 3 1ears PARTS 3 years P1ugin Matrix Dec:oders . LABOR -3years PARTS 5 years SpeakQfS afld Cabinets LABOR -5 years TO VALIDATE YOUR WARRANTY; YOU MUST Fill OUT AND MAIL THE WARRANTY REG ISTRATION CARD TO MARANTZ COMPANY. INC. P. O.BOX 99, SUN VALLEY, CALIFORNIA 91352, WITHIN TEN DAYS FOllOWING THE DATE OF PURCHASE. F()r Warranty repair, send this produ.ct,to Marantz COmpay, lnt:, 8150 Vineland Avenue, Sun Valley, Cillifornia 91352,01 to an AUTHORIZED. Matantz Service Station. AllShipping charges must be prepaid. Marantzwill pay returrishtpPlngehatges toanydeilignatedpoint within the United States. . This VVarranty is void if the serial number has been altered or removed; if the prowctk modified or repaired in any manne whicb Marantz believes may affect the reliabitityof the product; if the product is not OPerated in accordance witll theinstruetion manual, Marantz shall hale no liability whatsoever for consequential damages. The sole responsibility of Marantz Company, Inc., under this Warranty shall be linlited to the repair of the product. or replacement ther.eof, in the sole discretion of Marantz C()mpariy. InC. EXCEPT TOTHE EXTENT THATAPPLICABLE LAW tRECllJOES A DISCLAIMER OF WARRANTY, THERE IS NO IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS WITH REsPECT .TO THIS PRODUCT. NOR ARE THERE ANY OTHER WARRANTIES WHICH EXTENT BEYOND THE PROVISIONS OFTHISWARRANtY. . . 8150 Vineland Avenue, Sun. Valley, Calijornia 91352 REGISTRATION FOR MARANTZ 3-YEAR GOLDEN WARRANTY Model Purchased Date of Purchase _.-_ Place of Purchase Address City _ _ State _ Serial Number The above information becomes your permanent record of a valuable purchase. It should be promptly filled in at the same time that you fill in and mail the warranty registration AC Line Operation reply card to Marantz. This information provides a valuable WARNING: TO PREVENT FIRE OR SHOCK HAZARD, 00 insurance record and must also be referred to should you NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. have any correspondence with Marafitz. I RadioFans.CN 收音机爱 好者资料库 FOR WORD To obtain optimum performance and enjoyment from the Model CD-400B, please study these in structions and follow the step-by-step procedures carefully. This manual is divided into two parts. The first covers installation and operation in simple, non technical language. The second describes the Model CD-400B in more technical detail. For quick identification of the controls and con nections, references to these are printed in BOLD FACE TYPE. may institute a claim against the carrier for shipping damage. Save the carton and all packing material as evidence of damage for their inspec tion. Should assistance be required, the Marantz Company will cooperate fully in assisting your claim., Please fill out and mail the Warranty Registration Card as soon as possible. The Marantz 3-year Golden Warranty will not go into effect until the Marantz Company receives the registration card, which was packed in the carton with your Model CD-400B. TABLE 0 C NTENTS GENERA DESCRIP 10 Your Marantz Model CD-400B is a simple to operate demodulator for obtaining four discrete channels from CD-4 records. The Model CD-400B incorporates an Automatic Noise Reduction Cir cuit to minimize record noise without affecting frequency response, and an automatic 30 kHz Connecting the CD-400B Adjustments Front Panei Features Power Indicator Power Switch Selector Switch Mode Switch Rear Panel Features 2 CH Direct Out Switch and Jacks 2 2 4 4 4 4 4 5 5 carrier level control which selects the optimum Phono Input Jacks 5 carrier level for the cartridge being used. NoncCD Aux Input Jacks 4 records may also be played through the CD 4 CH Out Jacks 400B without affecting their performance. The Chassis Ground 5 5 5 CD400Bs controls do not have to be adjusted to Separation Controls 5 play non-CD-4 records. When CD4 records are Line Cord played and the MODE pushswitch is in the 4 CH AUTO position, the RADAR indicator will Operation Notes illuminate and the record will automatically be demodulated into four discrete channels. 5 6 Functional Description General Specifications Service Notes AFTER UNPACKIN Repairs It is advisable to retain all original packing ma terial to prevent damage should you wish to transport or ship the Demodulator (refer to page LIST FilL S RATIONS 8 for repacking and shipping instructions), Pleaseinspect your CD-400B carefully for any signs of shipping damage. Our very strict quality 1. Connection Diagram control and professional pride ensure that each 2. Front Panel Switches 8 8 8 3 CD-400B left the factory in perfect condition. If the unit is damaged or fails to operate, im mediately notify your dealer. If the unit was shipped to you directly, notify the transportation company without delay. Only you, the consignee, 3. Rear Panel Connection Facilities and Controls 4. Cartridge Mounting 5. Functional Block Diagram 6. Packing Instructions 5 6 7 8 6 4 RadioFans.CN 收音机爱 好者资料库 4. Set the controls on the 4-channel amplifier in CONNECTING T EC. -4008 accordance with the manufacturers instruc Turn off the Model CD-400B and any equipment that will be connected to it before making any connections. The CD-400B must be used with a turntable or changer equipped with a cartridge designed for CD-4 records. 1. Connect the turntable or changer to the rear panel of the CD-400B with the special audio cables recommended by the cartridge manu facturer. Using any other cable may seriously degrade the performance of the CD400B. TURNTABLE/CHANGER CD-400B LEFT OUTPUT to lEFT PHONO RIGHT OUTPUT to RIGHT PHONO GROUNDING WIRE to CHASSIS GROUND 2. Using standard shielded audio cables with phono plugs make the following connections. 4CHANNEL AMPLIFIER CD400B FRONT CD4/AUX L to 4 CHANNEL OUT FRONT l FRONT CD-4/AUX R to 4 CHANNel OUT FRONT R REAR CD-4/AUX L to 4 CHANNEL OUT REAR L REAR CD4/AUX R to 4 CHANNel OUT REAR R PHONO IN LEFT to 2 CHANNEl DI RECT OUT lEFT PHONO IN RIGHT to 2 CHANNEL 01 RECT OUTRJGHT 3. A discrete 4-channel playback device (0-8 cartridge player, 4-channel discrete reel-to-reel tape deck, etc.) may be connected to the CD 400B using standard shielded audio cables with phono plugs as follows: DISCRETE 4-CHANN.El CD-400B PLAYBACK DEVICE LEFT FRONT or L F or CHANNEL 1 or TRACK 1 to FRONT AUX l LEFT REAR or L R or CHANNEL 2 or TRACK 2 to REAR AUX l RIGHT FRONT or R For CHANNEL 3 orTRACK 3 tp FRONT AUX R RIGHT REAR or R R or CHANNEL 4 orTRACK 4 to REAR AUX R tions. 5. Set the CD-400Bs front panel MODE push switch to the 4 CH AUTO position. 6. Set the front panel SELECTOR pushswitch to the PHONO position. 7. Set the rear panel DIRECT OUT switch to OFF. 8. Connect the AC line cord to an AC outlet providing the AC voltage and frequency speci fied on the rear panel serial number nameplate. Turn on the turntable, CD-40GB and 4-channel amplifier. ADJUSTMENTS Before the Model CD400B can properly demod ulate CD-4 records, a few simple adjustments must be made. The following adjustment procedure should be performed whenever a new cartridge or stylus is installed. 1. Decrease the front channel volume on the .t main amplifier so that only the rear speakers can be heard. 2. Play the CD-4 ADJUSTMENT TONE band of the test record. 3. Adjust the rear panel LEFT SEPARATION CONTROL for minimum sound level from the left rear speaker. 4. Play the CD-4 ADJUSTMENT TONE band of the test record. 5. Adjust the rear panel RIGHT SEPARATION CONTROL for minimum sound from the right rear speaker. 6. PlaytheCHANNELBALANCE ADJUSTMENT TONE band of the test record and using the BALANCE CONTROLS of the main amplifier, adjust the relative sound level of each of the four channels to achieve a satisfactory four channel balance. NOTE: The CD-400B contains a special circuit to control the lock range of the carrier -.t - detector and thereby optimize its per formance. No adjustments for carrier level (band 2 of the supplied test record) RadioFans.CN 收音机爱 好者资料库 CD4 RECORD PLAYER OUTPUT . OUTlItT are therefore necessary. However, in ingdistorted sound and intermittent extreme cases of badly worn discs and 4-channel operation. If this is the case, stylus or poorly designed cartridges, the either. a new disc, a new stylus, or a carrier level output may be outside the better cartridge must be secured. range of automatic compensation, caus- MARANTZ MODEL CD-400B 00 FROT LEfT 1-FROT RIGHT I 0 U REAR LEFT REAR RIGHT . - 4CHANNEL TAPE DECK 4CHANNU AMPLIFIER RadioFans.CN 收音机爱 好者资料库 FRONT PANEL FEATURES POWER INDICATOR The POWER INDICATOR illuminates to signify that the Model CD-400B is on when the POWER pushswitch is depressed. POWER SWITCH The POWER pushswitch activates the Model CO400Bs power when depressed. When the push switch is released, the AC power is off. SELECTOR SWITCH When this switch is set to the PHONO position, the Model CO-400B is set for listening to CO-4, 2-channel, or 4,channel matrix records. When set to the AUX position, any input that has been connected to the rear panel AUX input jacks will be fed directly through the CO-400Bs 4 CH OUT jacks. This permits listening to dis- Figure 2. Front Panel Switches crete 4-channel sources such as an 8-track tape deck, 4-channel reel-to-reel deck, etc. MODE SWITCH 4 CH AUTO: When in the 4 CHAUTO position, CO-4 records will automatically be reproduced with four discrete channels. 2-channel records and 4-channel matrix records will be reproduced with the left channel of the record fed to the left front and left rear amps, while the right channel is fed to the right front and right rear amps. . 2CH: When in the 2 CH POSItIon all records, including CO-4 records, will be reproduced in the 2-chimnel mode. Some 2-channet records may contain enough high frequency signals to . render them unplayable in the 4 CH AUTO posi tion.lf this occurs, set the MODE switch to the 2 CH position. RADAR: When the MODE pushswitch is set to the 4 CH AUTO position, the RADAR indicator will illuminate when a COA record is being played. RadioFans.CN 收音机爱 好者资料库 2 CH 01 RECT OUT SWITCH AND JACKS When set to the ON position, the PHONO INPUT signal is fed directly to the DIRECT OUT jacks. These jacks may be connected to the PHONO IN jacks of an amplifier as an alternate method for playing stereo or 4-channel matrix records. When set to the OFF position, the PHONO INPUT signal is processed by the CD-400B. PHONO INPUT JACKS These jacks are intended to be used with a CD-4 magnetic cartridge. AUX INPUT JACKS These jacks are for connecting any 4-channel high level source. Manufacturers may use different terminology for the four channels, and care should be exercised to avoid confusing the chan nel connections. The following are examples of 4channel nomenclature equivalents: :JI LEFT FRONT LF-LF-CHANNEL 1 -TRACK 1 LEFT REAR LR-LB-CHANNEL 2 -TRACK 2 RIGHT FRONT RF-RF-CHANNEL 3 -TRACK 3 RIGHT REAR RR-RB-CHANNEL 4 -TRACK 4 Figure 3. Rear Panel Connection Facilities and Controls 4 CH OUT JAC KS These high level output jacks should be connected to the AUX IN or CD-4/AUXjacks on a 4-channel console amplifier or pre-amplifer. CHASSIS GROUND This binding post is for the connection of the ground wire from the turntable or record changer. SEPARATION CONTROLS The LEFT and RIGHT SEPARATION CON TROLS adjust channel separation between the left front and left rear and right front and right rear speakers respectively. See adjustment section. LINE CORD Connect the AC line cord to an AC outlet provid ing the AC voltage and frequency specified on the rear panel serial number nameplate. 5 RadioFans.CN 收音机爱 好者资料库 I OPERATION NOTES ,FUNCTIONAL QESCRIPTION 1. Separation Adjustment In the CD-4 record two sigAals are superimposed Once the separation controls are set they on each wall of the same groove. One is the SUM should not need readjustment until the carSIGNAL LF + La (or RF + Rs). The other is a tridge and/or stylus is replaced. 30 KHz carrier modulated itl frequency by the 2. Anti-Skating DIFFERENCE SIGNAL LF -L8 (or RF .:. Rs). For optimum results with the CD-400B, the Referring to the block diagram of Figure 5, the anti-skating force on the turntable should be compositesignal picked up b the phone cartridge carefully adjusted in, accordance with the , is first passed through a circuit which provides manufacturers instructions. standard RIAA equalization. Its output signal is 3. Cartridges split into two different paths: One path goes Only a magnetic cartridge designed for CD-4 through a Low Pass filter that lets only the sum reproduction will provide usable playback resignal through to the mixing circuit while stop sults. The cartridge must be mounted perping the carrier. A separation adjustmentis included pendicularto the record surface. See Figure 4. in this path to compensate for the variation :in The stylus must be kept clean. Consult your output level from different cartri.dges. The bther dealer for cleaning accessories. path .takes the signal through a High Pass Filter 4. Turntable Leads which blocks the sum signal, but allows the Only coaxial audio cables designed for CD-4 modulated high frequency carrier -to be presented use should be used. Consult your dealer for the to the FM Detector, after amplification to proper type. the proper level. There, the difference signal is recovered (detected) by means of a low distortion 5. TV Interference A TV set located near the CDA record player Phase Locked Loop circuit. The 30 kHz level is may interfere with playback of CD-4 discs. automatically adjusted to suit different types of If this should occur, either turn off the TV or cartridges and set-up conditions. move the record player away from the TV. The Low Pass filter that follows the FM detector 6. Record Care suppresses any vestiges of the high frequency CDA records require cleanliness. Keep them carrier, leaving only the original difference signal. away from dust, dirt and cigarette smoke. fn recording, the frequency response of the differ Clean them with a high quality record cleanence signal is modified to improve signal-to-noise ing device before playing and before storing. ratio and crosstalk. The circuits labelled De Do not use solvents or water because they will emphasis and AN RS in the CD-400B block diag