Thomson-RT2280-avr-sm 维修电路原理图.pdf

DSP/AC3 Theory of Operation In order to easily diagnose the operation of the DSP/AC3 board one must have an understanding of its operation. The below circuit description is provided to familiarize you with its functions and how an audio signal is processed by the circuit. The DSP/AC3 provides two basic functions, analog signal processing and digital signal processing. For a better understanding of its operation refer to the IC block diagrams. We will cover the analog signal flow first and then the digital. The right and left analog signal enter the board via CP401 pins 7 and 9 respectably, IC11 and 12 then amplify the signals. Once amplified the signals are sent to IC1 pins 16 and 20. IC1 converts the analog signal to a digital signal and it exits IC1 as a Serial Digital signal, SDOUT, on pin 4. The SD signal is then sent to IC5 pin 27 for processing. IC5 determines if the signal is a standard surround sound signal or Dolby ProLogic signal. The function of IC5 is determined by data from IC19. IC19 acts as a buffer for data from the main system control microprocessor. These signals will determine if the DSP IC, IC5, is in the Dolby ProLogic, concert, stadium, theater, church, arena, or club mode. The digital signal is then processed by IC5 and exits as three digital signals at pins 39, 40 and 41. These signals then enter IC1on pins 1, 2 and 3. IC1 decodes the three digital signals into appropriate analog signals and processes them out pins 23 through 26 to IC6, 7 and 8. IC6, 7 and 8 then amplify the signal and it is processed out CP402 pins 1(LF), 3(RF), 5(C), 7(S-L), 9(S-R) and 11(SW). A digital signal can be provided by either the COAX-IN or Optical cable. The Coax in is delivered to IC14 pin 4 and the Optical signal is delivered to IC14 pin 12. The digital signal contains the audio information and a timing or clock signal. The clock is processed by IC14 and OCLK exits on pin 16 and OLRCK at pin 17. The two clock signal are then buffered by IC18 and sent on to IC1 and IC5 for timing. The digital audio is processed into an SD (Serial Digital) signal and processed out pin 18 to pin 22 of IC5. IC5 then determines if the signal is an AC-3 or DTS signal. As in the analog mod, the data from IC19 determines the mode of the DSP. After being processed by IC5 the Digital signal exits IC5 as three digital signals on pin 39, 40 and 41. These signals then enter IC1on pins 1, 2 and 3. IC1 decodes the three digital signals into appropriate analog signals and processes them out pins 23 through 26 to IC6, 7 and 8. IC6, 7 and 8 then amplify the signal and it is processed out CP402 pins 1(LF), 3(RF), 5(C), 7(S-L), 9(S-R) and 11(SW). RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库RT2280 IC COMPLIMENT IC# TYPE FUNCTION DATA SHEET IC1 CS4228 24-Bit, 96 kHz Surround Sound Codec YES IC101 78M06 Voltage Regulator +6 Volts N/A IC102 78M15 Voltage Regulator +15 Volts N/A IC103 79M15 Voltage Regulator 15 Volts N/A IC104 7805 Voltage Regulator +5 Volts N/A IC106 BA33T Voltage Regulator +3.3 Volts N/A IC107 BU4053 Triple 2-Channel Analog Switch NO IC108 KIA4558 Dual Low Noise OPAMP N/A IC11 NJM2068DD Dual Wide Band OPAMP N/A IC12 NJM2068DD Dual Wide Band OPAMP N/A IC14 CS8415 96 kHz Digital Audio Interface Receiver YES IC18 74VHC244FW Octal Buffer/Line Driver YES IC19 74VHC244FW Octal Buffer/Line Driver YES IC200 LC78211 Analog Switch NO IC201 LC78211 Analog Switch NO IC202 KIA4558 Dual Low Noise OPAMP N/A IC300 KIC9162 Analog Switch NO IC300 CXP8228 System Control Microprocessor NO IC301 KIA4558 Dual Low Noise OPAMP N/A IC302 KIA4558 Dual Low Noise OPAMP N/A IC303 KIA4558 Dual Low Noise OPAMP N/A IC400 SM7346 Multi-channel Volume Control NO IC401 KIA4558 Dual Low Noise OPAMP N/A IC402 KIA4558 Dual Low Noise OPAMP N/A IC403 KIA4558 Dual Low Noise OPAMP N/A IC5 CS49325 MPEG, DTS, Dolby Decoder YES IC6 NJM2068DD Dual Low Noise OPAMP N/A IC7 NJM2068DD Dual Low Noise OPAMP N/A IC8 NJM2068DD Dual Low Noise OPAMP N/A IC950 BU4052 Analog Switch NO STANDBY/ONTHOMSON multimedia Inc.10330 N.Meridian St.Indianapolis, IN 46290 2001 Thomson multimedia Inc.Trademark(s) RegisteredMarca(s) Registrada(s)Marque(s) Depose55135910 (EN/F/E)IMPORTADOR COMERICALIZADORA THOMSON DE MEXICO S.A. DEC.V SIERRA CANDELA NO. 111, PISO 11COL. LOMAS DE CHAPULTEPECDEL. MIGUEL HIDALGOMEXICO D.F. C.P. 11000R.F.C. CTM-980723 KS5HOME THEATER AV SURROUND RECEIVER RT22806 CH.INVCR-2 / VIDEO CAM INPUTHigh Current Discrete AmplifierNFUNCTIONusermanualRT2280/RT2250/RT2250RFCC InformationThis device complies with Part 15 of the FCC Rules.Operation is subject to the following two condi-tions: (1) This device may not cause harmful interference, and (2) this device must accept anyinterference received, including interference thatmay cause undesired operation.In accordance with FCC requirements, changes ormodifications not expressly approved by Thomsonmultimedia Inc. could void the users authority tooperate this product.This device generates and uses radio frequency (RF)energy, and if not installed and used properly, thisequipment may cause interference to radio and television reception.If this equipment does cause interference to radioor television reception (which you can determine byunplugging the unit), try to correct the interferenceby one or more of the following measures: Re-orient the receiving antenna (that is, theantenna for the radio or television that is receiving the interference). Move the unit away from the equipment that isreceiving interference. Plug the unit into a different wall outlet so thatthe unit and the equipment receiving interferenceare on different branch circuits.If these measures do not eliminate the interference,please consult your dealer or an experiencedradio/television technician for additional suggestions. Also, the Federal CommunicationsCommission has prepared a helpful booklet, HowTo Identify and Resolve Radio TV InterferenceProblems. This booklet is available from the U.S.Government Printing Office, Washington, DC 20402.Please specify stock number 004-000-00345-4 whenordering copies.This product complies with DHHS Rules 21 CFRSubchapter J. Applicable at the date of manufacture.For Your Safety The AC power plug is polarized(one blade is wider than theother) and only fits into ACpower outlets one way. If theplug wont go into the outletcompletely, turn the plug overand try to insert it the otherway. If it still wont fit, contacta qualified electrician to change the outlet, or use adifferent one. Do not attempt to bypass this safetyfeature. CAUTION: TO PREVENT ELECTRIC SHOCK,MATCH WIDE BLADE OF PLUG TO WIDE SLOT,FULLY INSERT.For Your Records In the event that service should be required, youmay need both the model number and the serialnumber. In the space below, record the date andplace of purchase, and the serial number:Model No. Remote Control No. CRK76Date of Purchase Place of Purchase Serial No. Service Information This product should be serviced only by those spe-cially trained in appropriate servicing techniques.For instructions on how to obtain service, refer tothe warranty included in this GuideWARNING: TO PREVENT FIREOR ELECTRICAL SHOCK HAZARD,DO NOT EXPOSE THIS PRODUCTTO RAIN OR MOISTURE.SEE MARKING ON BOTTOM / BACK OF PRODUCTCAUTIONRISK OF ELECTRIC SHOCK DO NOT OPENTHE EXCLAMATIONPOINT WITHIN THETRIANGLE IS AWARNING SIGNALERTING YOU OFI M P O R T A N TI N S T R U C T I O N SA C C O M PA N Y I N GT H E P R O D U C T.THE LIGHTNINGFLASH AND ARROW-HEAD WITHIN THETRIANGLE IS AWARNING SIGNALERTING YOU OF D A N G E R O U SVOLTAGE INSIDETHE PRODUCT.CAUTION: TO REDUCE THERISK OF ELECTRIC SHOCK,DO NOT REMOVE COVER(OR BACK). NO USER-SERVICEABLE PARTS IN-SIDE. REFER SERVICINGTO QUALIFIED SERVICEPERSONNEL.1Table of ContentFCC Information Getting Started Unpacking the Receiver . . . . . . . . . . . . .2Unpacking the Speakers (RT2280 Only) . .3Inserting Batteries into Remote Control .3Set Up and Maintenance of the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . .3Protect your Components from Overheating . . . . . . . . . . . . . . . . . . . . . . .3Connecting to Audio-Visual Components . . . . . . . . . . . . . . . . . . . . . .4Digital Connection . . . . . . . . . . . . . . . . .5Connecting Antennas . . . . . . . . . . . . . . .5Connecting the Speakers . . . . . . . . . . . . .6Connecting the Subwoofer . . . . . . . . . . .6Positioning your Speaker . . . . . . . . . . . . .7Front Speaker Placement . . . . . . . . . . . . .7Surround Placement . . . . . . . . . . . . . . . .8Advanced Surround Setting . . . . . . . . . .8Test Tone / Channel Balance . . . . . . . . . .9Connecting for Power . . . . . . . . . . . . . . .9Using Headphones . . . . . . . . . . . . . . . . . .9Factory Setting . . . . . . . . . . . . . . . . . . . . .9Operating your Receiver Receiver Controls . . . . . . . . . . . . . . . . . .10Your Remote Control . . . . . . . . . . . . . . .11Display . . . . . . . . . . . . . . . . . . . . . . . . . .12Switching On/Off . . . . . . . . . . . . . . . . . .13Selection of Audio/Video Source . . . . . .13Using the Remote to Control AdditionalComponents . . . . . . . . . . . . . . . . . . . . . .14Using the receiver to play a Source . . . .15Advanced Sound Control Sound Enhancement Systems . . . . . . . .19Fine Setting of Components . . . . . . . . .20Fine Setting of the Speakers . . . . . . . . .21Advanced Setting . . . . . . . . . . . . . . . . .21Care and Maintenance Troubleshooting Tips . . . . . . . . . . . . . . .23Receiver/Tuner Operation . . . . . . . . . .23Remote Control Operation . . . . . . . . .23General . . . . . . . . . . . . . . . . . . . . . . . .23Cleaning the Exterior . . . . . . . . . . . . .23Equipment Specifications . . . . . . . . . .23Remote Codes Cable Codes . . . . . . . . . . . . . . . . . . . . . .24VCR Codes . . . . . . . . . . . . . . . . . . . . . . .24TV Codes . . . . . . . . . . . . . . . . . . . . . . . .25Satellite Receivers . . . . . . . . . . . . . . . . .26Audio (RCA only) . . . . . . . . . . . . . . . . . .26Laser disc Players . . . . . . . . . . . . . . . . . .26Limited Warranty (US) . . . . . . . . .27Limited Warranty (Canada) . . . . .28ENGetting StartedUnpacking the ReceiverYou should receive the following items:2HOME THEATER AV SURROUND RECEIVER RT22806 CH.INVCR-2 / VIDEO CAM INPUTHigh Current Discrete AmplifierSTANDBY/ONFUNCTION+ -+ -One receiver unitOne pair of “AA” batteriesOne external FM DipoleantennaOne external AM loopantennaone audio cable (two wires) with redand white RCA connectors;one video cable (single wire) withyellow RCA connectors;STOPPAUSETVON OFFVCR1VCR2DVD6 CHLEVELAUDIORECORDSURRDIGITALPLAYFORWARDREVERSEMUTECH+CH-VOLVOLTAPECDMENUCLEAR1234567890SATCABLEu n i v e r s a lAMFMINFORDSINPUTSEEKANTFMSGOBACKDISKGUIDERDMPTYOK one instruction book; one safety leaflet; one Quick Connection GuideOne RCA UniversalRemote Control(CRK76)Getting StartedUnpacking The Speakers (RT2280/RT2250 Only) one set of speakers including 2 left and right frontspeakers, 1 centre speaker, 1 subwoofer and 2 leftand right rear speakers. 6 speaker cables including:Inserting Batteries into Remote Control Insert two AA(R6) batteries according to the + and -signs on the battery compartment. To use the remotecontrol, point it directly at your receiver.Set up and Maintenance of the Receiver Provide spaces for sufficient ventilation as indicated: Do not connect to the AC power cords until allconnections are completed. Do not use your set immediately after transferringit from a cold place to a warm place: there is risk ofcondensation. Do not expose your set to water and excessivelyhigh temperatures. After having disconnected your set, clean the casewith a soft cloth, or with a slightly damp leatherchamois. Never use strong solvents.Protect your Components fromOverheating Do not block ventilation holes in any component.Arrange the components so that air can circulatefreely. Do not stack components directly on top of eachother. Allow adequate ventilation when placing yourcomponents in a stand. Place an amplifier near the top shelf of the standso heated air rising from it will not affect other com-ponents. If you have a satellite receiver, you shouldplace it on the top shelf.EN310 cm/410 cm/ 410 cm/ 410 cm/45 cm/ 2FRONT SPEAKERSCENTER SPEAKERSSUB WOOFERREAR SPEAKERS(SURROUND SOUND)2 X grey/black cable for rear speakers1 X brown/blackcable for subwoofer1 X blue/black cablefor centre speaker2 X red/black cable for front speakersGetting StartedConnecting to Audio-Visual Components4PRE OUTFRONT LREAR LFRONT RREAR RINININOUTINMONITOR OUTINOUTDIGITAL INPUTDVD/CD/SATDVD/CD/SAT/TVOPTICALTVVCRCD PlayerTape DeckSAT Multi-Channel Decoder e.g. DTSto LINE OUT(Tape Deck)to LINE IN ( Tape Deck )to AUDIO OUT (CD)to VIDEO OUT (SAT)to AUDIO OUT (SAT)to S-VIDEO OUT (SAT)to S-VIDEO OUT (DVD)to AUDIO OUT(DVD)to VIDEO OUT (DVD)to AUDIO OUT (TV)to VIDEO IN (TV)to S-VIDEO IN (TV)to AUDIO OUT (VCR)to VIDEO OUT (VCR) to VIDEO IN (VCR) to AUDIO IN (VCR)to AUDIO OUTto AUDIO OUT (DVD)UNIT BACK PANELDIGITAL CONNECTIONIf you have a SAT receiver DVD player or CD player with a digital output, you can make use of an optical digital connecting cord (not supplied) or coaxial digital connecting cord (not supplied) to carry the audio portion of the signal and enjoy Dolby Digital sound quality. One optical or coaxial cable is needed for each SAT receiver, DVD player or CD player. When optical or coaxial cable is used, the analog audio cables are still needed if recording through a tape or VCR is desired. This receiver provides one optical and one coaxial digital input for the connection of your components. Please connect your components (e.g. DVD, SAT or CD) to the appropriate digital inputs and press FUNCTION and then rotate MULTIJOG to match your connection. Note: Optical and coax cables carry only the audio portion of the signal. A video connection must also be established for a SAT receiver and DVD player. S-video provides the best connection for the video portion of the signal. Composite video (yellow RCA connector) can also be used. It isimportant that the same type of cable (S-video or composite) that is connected from the Home Theater to the TV is used to connect the SAT receiver or DVD player to the Home Theater.FRONT TERMINALRemark: If you have a video camera, video game machine, or an extra VCR, connect it to VCR 2 jack at the front of the receiverDIGITAL INPUTConnect components capable of outputing Dolby Digital (e.g. DVD or SAT) or standard PCM (CD) format digital signals. Read section on Input Signal Setting under Advanced Sound Control carefully to adjust the matching input settings. If your CD player is equipped with digital optical jacks, use of optical cable is preferred. What you need is just one more optical digital connecting cord(not supplied). Plug it in the digital input jack of the receiver and select OPTICAL on the receiver setting (see details on pg 20 chapter Input Signal Setting). You can enjoy better sound quality brought to you by the