Technics-SHDV-290-EG-Service-Manual电路原理图.pdf
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1、ORDER NO.AD0303068C8 Sound Processor SH-DV290EG Colour (S) .Silver Type System: SC-DV290 Because of unique interconnecting cables,when a component requires servise,send or bring in the entire system. Note: Refer to the service manual for Model No. SA-DV290E/EG/EB (ORDER NO.AD0303067C2) for informati
2、on on “ACCESSORIES”and “PACKAGING”. SPECIFICATIONS Specification 1 EQ/SFP section MANUAL GEQ 5-Band EQ Center frequency70/300/1 k/3.15 k/10 kHz Level control2.0, 4.0, 6.0 dB EQ/Space mode 4 modesHEAVY, CLEAR, SOFT, HALL SUPER 3D AI EQ 3 modesAI EQ, SUPER 3D AI 1, SUPER 3D AI 2 Pre-amplifier section
3、Input sensitivity/impedance VCR (EXT) 250 mV/15 k VDP (AUX) 250 mV/15 k Output level VCR REC OUT 150 mV/1.5 k DOLBY PRO LOGIC section PRO LOGIC modeSURROUND CENTER modeNORMAL DELAY TIME20 ms (Fixed) AV SURROUND section AV surround mode SUPER SURROUND (MUSIC, MOVIE) DSP CONTROL section DSP control mo
4、deSUPER SOUND EQ CENTER FOCUS VIRTUAL REAR SURROUND MULTI REAR SURROUND SEAT POSITION Spectrum analyzer section Display modeNORMAL, PEAKHOLD, AURORA General Dimensions (WHD)29389270 mm Mass1.5 kg Power SupplyDC10V/ -25V, AC4.6V Power Consumption7W Nots1.Design and specifications are subject to chang
5、e without notice. 2.Dimensions and weight are approximate. 3.Total harmonic distortion is measured by the digital spectrum analyzer. System/SC-DV290 Sound processor: SH-DV290, DVD/ Video CD/ CD changer: SL-DV290, Tuner/ Amplifier: SA-DV290 , Cassette Deck: RS-DV290, Speakers: Front* (SB- DV290),Cent
6、er* (SB-PC95),Surround* (SB-PS95) (*Made in MAES.) Manufactured under license from Dolby Laboratories. / “Dolby”,”Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories. 2 1. Before Repair This equipment (SH-DV290), which is the component of the system, is supplied with power from t
7、he amplifier (SA-DV290).When repairing this equipment or checking operation of the system, be sure to connect the amplifier with it. Power supply and operation check in the state of it as a single equipmenet are impracticable. 2. Operating Instructions 3. Operation Checks and Component Replacement P
8、rocedures - This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. - For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 3
9、.1. Checking for the FL P.C.B. 3 - Check the FL P.C.B. as shown below. 3.2. Checking for the main P.C.B. - Follow the (Step 1) - (Step 3) of item 3.1. 4 - Check the main P.C.B. as shown below. 5 4. Wiring Connection Diagram 5. Block Diagram 6. To Supply Power Source This unit is designed to operate
10、on power supplied from system connected. When a component requires service, use the system connections to supply power source. For system connections. (Refer to Fig. 1) Fig. 1 7. Schematic Diagram Notes 7.1. Type Illustrations of ICs, Transistors and Diodes 7.2. Schematic Diagram Notes - This schema
11、tic diagram may be modified at any time with development of new technology. Notes: 6 - S601: Display mode (DISPLAY MODE) switch. - S602: DOLBY PRO LOGIC ( PRO LOGIC, OFF/ ON) switch. - S603: Super surround (SUPER SURROUND) switch . - S604: Super sound EQ (SUPER SOUND EQ) switch . - S605: Center focu
12、s (CENTER FOCUS) switch. - S606: Virtual rear surround (VIRTUAL REAR SURROUND) switch. - S607: Multi rear surround (MULTI REAR SURROUND) switch. - S608: Jog control () switch. - S609: Jog control () switch. - S610: Jog control () switch. - S611: Jog control () switch. - S612: Super 3D AI EQ (SUPER 3
13、D AI EQ) switch. - S613: Seat position (SEAT POSITION) switch. - S614: Joystick (MULTI JOG) switch. - Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors
14、 in the voltage values, depending on the internalimpedanceof the DC circuit tester. / No mark: Power on Important safety notice: Components identified by mark have special characteristics impotant for safety. Furthermore, special parts which have purpose of fire-retardant (resistors), high-quality s
15、ound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufactures specified parts showninthe parts list. Caution! - IC and LSI are sensitive to static electricity. - Secondary trouble can be prevented by taking care during repair. - Cover the
16、 parts boxes made of plastics with aluminum foil. - Ground the soldering iron. - Put a conductive mat on the work table. - Do not touch the legs of IC or LSI with the fingers directly. Voltage and signal line 7 : Positive voltage line : CD Playback signal line : Negative voltage line 8. Schematic Di
17、agram 9. Printed Circuit Board Diagram 10. Terminal Function of ICs 10.1. IC601(C2BBGF000425):System control/FL drive Pin No. MarkI/O / Division Function 1KEY1IOperation key1 signal input terminal 2KEY2IOperation key2 signal input terminal 3SP INIA/D signal input terminal from IC602 4SP AOBand selec
18、t signal output terminal for IC602 5SP BOBand select signal output terminal for IC602 6SP COBand select signal output terminal for IC602 7SA CSIChip select signal input terminal 8DSP RSTOReset signal output terminal for IC401 9DSP CSOChip select signal output terminal for IC401 10DSP SNSISense signa
19、l input terminal from IC401 11DSP ACK IAcknowledge signal input terminal from IC401 12DSP CKOClock signal output terminal for IC401 8 Pin No. MarkI/O / Division Function 13DSP DOOData signal output terminal for IC401 14DSP DIIData signal input terminal for IC401 15JOGAIJOG A signal input terminal 16
20、JOGBIJOG B signal input terminal 17CNVSSIConnected to GND through resistor 18RESETISystem reset signal input terminal 19NC-Not used, open 20NC-Not used, open 21VSS-GND terminal 22XINICeramic oscillator input terminal (f=4MHz) 23XOUTOCeramic oscillator output terminal (f=4MHz) 24VCCIPower supply inpu
21、t terminal 25NC-Not used, open 26NC-Not used, open 27LED CFOOORANGE LED(CENTER FOCUS) signal output terminal 28LED CFGOGREEN LED(CENTER FOCUS) signal output terminal 29BR93 DATA IData signal input terminal from EEPROM 30BR93 CS-Not used, open 31BR93 CK-Not used, open 32SYNCIPower failure detect sign
22、al input terminal 33SA REQORequest signal output terminal for Tuner/Amplifier 34SA CKOSerial communication signal output terminal for Tuner/Amplifier 35SA DOOSerial communication signal output terminal for Tuner/Amplifier 36SA DIISerial communication signal input terminal from Tuner/Amplifier 9 Pin
23、No. MarkI/O / Division Function 37LED SSSOLED(SUPER SURROUND)signal output terminal 38LED DPLOLED(DOLBY PRO LOGIC) signal output terminal 39LED SPO OORANGE LED (SEAT POSITION) signal output terminal 40LED SPGOGREEN LED (SEAT POSITION) signal output terminal 41LED 3DOOORANGE LED (3D ENHANCED SURROUND
24、) signal output terminal 42LED 3DGOGREEN LED (3D ENHANCED SURROUND) signal output terminal 43LED MRO OORANGE LED (MULTI REAR SURROUND) signal output terminal 44LED MRG OGREEN LED (MULTI REAR SURROUND) signal output terminal 45LED VRO OORANGE LED (VIRTUAL REAR SURROUND) signal output terminal 46LED V
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