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1、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 ba
2、sic 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, IC1
3、1 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 st
4、andard 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,
5、 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
6、 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 cont
7、ains 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
8、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 pi
9、ns 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
10、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 Vo
11、lts 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 Buf
12、fer/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 Dua
13、l 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
14、/A IC7 NJM2068DD Dual Low Noise OPAMP N/A IC8 NJM2068DD Dual Low Noise OPAMP N/A IC950 BU4052 Analog Switch NO STANDBY/ON THOMSON multimedia Inc. 10330 N.Meridian St. Indianapolis, IN 46290 2001 Thomson multimedia Inc. Trademark(s) Registered Marca(s) Registrada(s) Marque(s) Depose 55135910 (EN/F/E)
15、 IMPORTADOR COMERICALIZADORA THOMSON DE MEXICO S.A. DE C.V SIERRA CANDELA NO. 111, PISO 11 COL. LOMAS DE CHAPULTEPEC DEL. MIGUEL HIDALGO MEXICO D.F. C.P. 11000 R.F.C. CTM-980723 KS5 HOME THEATER AV SURROUND RECEIVER RT2280 6 CH.IN VCR-2 / VIDEO CAM INPUT High Current Discrete Amplifier N FUNCTION us
16、ermanual RT2280/RT2250/RT2250R FCC Information This 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 any interference received, including interference that may ca
17、use undesired operation. In accordance with FCC requirements, changes or modifications not expressly approved by Thomson multimedia Inc. could void the users authority to operate this product. This device generates and uses radio frequency (RF) energy, and if not installed and used properly, this eq
18、uipment may cause interference to radio and television reception. If this equipment does cause interference to radio or television reception (which you can determine by unplugging the unit), try to correct the interference by one or more of the following measures: Re-orient the receiving antenna (th
19、at is, the antenna for the radio or television that is receiving the interference). Move the unit away from the equipment that is receiving interference. Plug the unit into a different wall outlet so that the unit and the equipment receiving interference are on different branch circuits. If these me
20、asures do not eliminate the interference, please consult your dealer or an experienced radio/television technician for additional suggestions. Also, the Federal Communications Commission has prepared a helpful booklet, How To Identify and Resolve Radio TV Interference Problems. This booklet is avail
21、able from the U.S. Government Printing Office, Washington, DC 20402. Please specify stock number 004-000-00345-4 when ordering copies. This product complies with DHHS Rules 21 CFR Subchapter J. Applicable at the date of manufacture. For Your Safety The AC power plug is polarized (one blade is wider
22、than the other) and only fits into AC power outlets one way. If the plug wont go into the outlet completely, turn the plug over and try to insert it the other way. If it still wont fit, contact a qualified electrician to change the outlet, or use a different one. Do not attempt to bypass this safety
23、 feature. 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, you may need both the model number and the serial number. In the space below, record the date and place of purchase, and the serial number
24、: Model No. Remote Control No. CRK76 Date 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 to the warranty included in this Guide WARNIN
25、G: TO PREVENT FIRE OR ELECTRICAL SHOCK HAZARD, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. SEE MARKING ON BOTTOM / BACK OF PRODUCT CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN THE EXCLAMATION POINT WITHIN THE TRIANGLE IS A WARNING SIGN ALERTING YOU OF I M P O R T A N T I N S T R U C T I O N S A C
26、C O M PA N Y I N G T H E P R O D U C T. THE LIGHTNING FLASH AND ARROW- HEAD WITHIN THE TRIANGLE IS A WARNING SIGN ALERTING YOU OF D A N G E R O U S VOLTAGE INSIDE THE PRODUCT. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER- SERVICEABLE PARTS IN- SIDE. REFER SER
27、VICING TO QUALIFIED SERVICE PERSONNEL. 1 Table of Content FCC Information Getting Started Unpacking the Receiver . . . . . . . . . . . . .2 Unpacking the Speakers (RT2280 Only) . .3 Inserting Batteries into Remote Control .3 Set Up and Maintenance of the Receiver . . . . . . . . . . . . . . . . . .
28、. . . . . . . .3 Protect your Components from Overheating . . . . . . . . . . . . . . . . . . . . . . .3 Connecting to Audio-Visual Components . . . . . . . . . . . . . . . . . . . . . .4 Digital Connection . . . . . . . . . . . . . . . . .5 Connecting Antennas . . . . . . . . . . . . . . .5 Connect
29、ing the Speakers . . . . . . . . . . . . .6 Connecting the Subwoofer . . . . . . . . . . .6 Positioning your Speaker . . . . . . . . . . . . .7 Front Speaker Placement . . . . . . . . . . . . .7 Surround Placement . . . . . . . . . . . . . . . .8 Advanced Surround Setting . . . . . . . . . .8 Test T
30、one / Channel Balance . . . . . . . . . .9 Connecting for Power . . . . . . . . . . . . . . .9 Using Headphones . . . . . . . . . . . . . . . . . .9 Factory Setting . . . . . . . . . . . . . . . . . . . . .9 Operating your Receiver Receiver Controls . . . . . . . . . . . . . . . . . .10 Your Remote
31、Control . . . . . . . . . . . . . . .11 Display . . . . . . . . . . . . . . . . . . . . . . . . . .12 Switching On/Off . . . . . . . . . . . . . . . . . .13 Selection of Audio/Video Source . . . . . .13 Using the Remote to Control Additional Components . . . . . . . . . . . . . . . . . . . . . .14 U
32、sing the receiver to play a Source . . . .15 Advanced Sound Control Sound Enhancement Systems . . . . . . . .19 Fine Setting of Components . . . . . . . . .20 Fine Setting of the Speakers . . . . . . . . .21 Advanced Setting . . . . . . . . . . . . . . . . .21 Care and Maintenance Troubleshooting Ti
33、ps . . . . . . . . . . . . . . .23 Receiver/Tuner Operation . . . . . . . . . .23 Remote Control Operation . . . . . . . . .23 General . . . . . . . . . . . . . . . . . . . . . . . .23 Cleaning the Exterior . . . . . . . . . . . . .23 Equipment Specifications . . . . . . . . . .23 Remote Codes Cable
34、 Codes . . . . . . . . . . . . . . . . . . . . . .24 VCR Codes . . . . . . . . . . . . . . . . . . . . . . .24 TV Codes . . . . . . . . . . . . . . . . . . . . . . . .25 Satellite Receivers . . . . . . . . . . . . . . . . .26 Audio (RCA only) . . . . . . . . . . . . . . . . . .26 Laser disc Players
35、. . . . . . . . . . . . . . . . . .26 Limited Warranty (US) . . . . . . . . .27 Limited Warranty (Canada) . . . . .28 EN Getting Started Unpacking the Receiver You should receive the following items: 2 HOME THEATER AV SURROUND RECEIVER RT2280 6 CH.IN VCR-2 / VIDEO CAM INPUT High Current Discrete Amp
36、lifier STANDBY/ON FUNCTION + - + - One receiver unit One pair of “AA” batteries One external FM Dipole antenna One external AM loop antenna one audio cable (two wires) with red and white RCA connectors; one video cable (single wire) with yellow RCA connectors; STOPPAUSE TVON OFFVCR1 VCR2DVD6 CH LEVE
37、LAUDIO RECORD SURRDIGITAL PLAYFORWARDREVERSE MUTE C H + C H - V O L V O L TAPECD MENUCLEAR 123 456 789 0 SATCABLE u n i v e r s a l AMFM INFORDS INPUTSEEK ANTFMS G O B A C K D I S K G U I D E R D M P T Y OK one instruction book; one safety leaflet; one Quick Connection Guide One RCA Universal Remote
38、 Control (CRK76) Getting Started Unpacking The Speakers (RT2280/RT2250 Only) one set of speakers including 2 left and right front speakers, 1 centre speaker, 1 subwoofer and 2 left and right rear speakers. 6 speaker cables including: Inserting Batteries into Remote Control Insert two AA(R6) batterie
39、s according to the + and - signs on the battery compartment. To use the remote control, 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 all connections are completed. Do not
40、use your set immediately after transferring it from a cold place to a warm place: there is risk of condensation. Do not expose your set to water and excessively high temperatures. After having disconnected your set, clean the case with a soft cloth, or with a slightly damp leather chamois. Never use
41、 strong solvents. Protect your Components from Overheating Do not block ventilation holes in any component. Arrange the components so that air can circulate freely. Do not stack components directly on top of each other. Allow adequate ventilation when placing your components in a stand. Place an amp
42、lifier near the top shelf of the stand so heated air rising from it will not affect other com- ponents. If you have a satellite receiver, you should place it on the top shelf. EN 3 10 cm/4 10 cm/ 4 10 cm/ 4 10 cm/4 5 cm/ 2 FRONT SPEAKERS CENTER SPEAKERS SUB WOOFER REAR SPEAKERS (SURROUND SOUND) 2 X
43、grey/black cable for rear speakers 1 X brown/black cable for subwoofer 1 X blue/black cable for centre speaker 2 X red/black cable for front speakers Getting Started Connecting to Audio-Visual Components 4 PRE OUT FRONT LREAR L FRONT RREAR R ININ INOUTIN MONITOR OUT INOUT DIGITAL INPUT DVD/CD/SAT DV
44、D/CD/SAT/TV OPTICAL TV VCR CD Player Tape Deck SAT Multi-Channel Decoder e.g. DTS to 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)
45、 to S-VIDEO IN (TV) to AUDIO OUT (VCR) to VIDEO OUT (VCR) to VIDEO IN (VCR) to AUDIO IN (VCR) to AUDIO OUT to AUDIO OUT (DVD) UNIT BACK PANEL DIGITAL CONNECTION If 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 suppl
46、ied) 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 neede
47、d 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 co
48、nnection. 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 is
49、important 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 TERMINAL Remark: If you have a video camera, video game machine, or an extra VCR, connect it to VCR 2 jack at the front of the receiver DIGITAL INPUT Connect components capable of outputing Dolby Digital (e
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