Eltax-AVR800-avr-sm维修电路原理图.pdf
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1、6.1 ChannelHome Theatre ReceiverSERVICE MANUALAVR-800CONTENTS Specifications . 2Measurements And Adjustments . 3Troubleshooting. 5IC Internal Diagrams . 6Electrical Parts List. 27Block Diagram. 33Wiring Diagram. 35Schematic Diagrams. 37Printed Circuit Boards . 45Exploded View. 53RadioFans.CN 收音机爱 好者
2、资料库- 2 -SPECIFICATIONSAmplifier SectionOutput Power Stereo Mode : 120W/CH (1% THD 1KHz 8ohm DIN)Surround Mode : 92W/CH (1% THD 1KHz 8ohm DIN)THD : 0.01%DOLBY DIGITAL Mode:Surround : 0 15 msCenter : 0 5 msBack surround : 0 20 msDOLBY PRO LOGIC Mode (Surround):Music : 05 msMovie : 1025 msEmulation : 1
3、025 msFrequency Response:*LINE: 10 Hz 70 kHz, +1/ 3 dBSignal-to-Noise Ratio:*LINE: 100dB (IHF-A)Tone Control:BASS: 10 dB at 100 HzTREBLE: 10 dB at 10 kHzDigital Audio SectionSampling Frequency:32 kHz, 44.1 kHz, 48 kHz, 96 kHzDIGITAL Input Level/Impedance: DIGITAL 1, 2 (OPTICAL): 15 dBm 21 dBmDIGITAL
4、 3 (COAXIAL): 0.5 Vp-p / 75 ohmsFM Tuner Section(Without notes 100.1 MHz, 65 dBf)Tuning Range:87.5 MHz 108.0 MHz (50 kHz steps)Usable Sensitivity (IHF):Mono: 11.2 dBf 50 dB Quieting Sensitivity:Mono: 15.3 dBf Stereo: 38.5 dBf Capture Ratio:2.0 dB Image Rejection Ratio: 45 dB AM Suppression Ratio: 55
5、 dBTotal Harmonic Distortion (1 kHz):Mono: 0.2%Stereo: 0.3%Frequency Response:30 Hz 15 kHz, +1/ 1.5 dBStereo Separation (1 kHz):40 dBSignal-to-Noise Ratio:Mono: 70 dBStereo: 65 dBAM Tuner SectionTuning Range:522 kHz 1,620 kHz (9 kHz steps)Usable Sensitivity:55 dB/mTotal Harmonic Distortion:0.8% at 8
6、5 dB/mSignal-to-Noise Ratio:45 dB at 85 dB/mVideo SectionInput Sensitivity/Impedance:1.0 Vp-p/75 ohmsOutput Level/Impedance:1.0 Vp-p/75 ohmsGeneralPower Requirements:230 V AC, 50 Hz Power Consumption:320W AC Outlets:Switched x 1, 100 W max. Dimensions (W x H x D)435 x 165 x 350 mm (17-1/8 x 6-1/2 x
7、13-3/4)Weight (net):12Kg*LINE means CD, TAPE, VCR/VID 1, TV/VID 2, AUX/VID 3 andDVD/CD. Improvements may result in specifications and featureschanging without notice. Illustrations may differ slightly from production models.RadioFans.CN 收音机爱 好者资料库ItemBandAM30%400HzFM100%(40KHz Dev.)400HzTUNER MODULE
8、TUNER MODULE ModulationModulation frequency- 3 -MEASUREMENTS AND ADJUSTMENTSALIGNMENT INSTRUCTIONSEQUIPMENT NEEDEDAM Signal GeneratorFM Signal GeneratorOscilloscopeVTVM(AC,DC)Test loop antenna(AM Adjustment)Dummy antenna(FM Adjustment)IMPORTANT1.Check power-source voltage.2.Set the function switch t
9、o band aligned.3.Keep the signal input as low as possible to adjust accurately.4.Modulation and modulation frequency.ADJUSTMENT POINTKST-M9014MS1(0)-70 FM/AM AUTO STOP LEVEL ADJUSTMENTFM Signal Generator . . . . Connect to FM ANT Jack (FM IN) through the dummy.AM Signal Generator . . . . Connect to
10、AM ANT. Coil the through the Loop antenn a .BANDStepAdjustmentTUNED Display ONTUNED Display OFFS i g n a l G e n e r a t o rA d j u s t f o rAMFM1212999 82dB999 81dB100.10 25dB100.10 24dBTUNED Display ONTUNED Display OFFSVR03SVR03SVR01SVR01- 4 -AM SGAM LOOP ANTENNAAC EVMOSCILLOSOPEKHzOUTOUTPUT60 cmF
11、M SG75 ohmAC EVMOSCILLOSOPEMHzOUTOUTPUTFM ANT.- 5 -TROUBLESHOOTINGProblemProbable CauseRemedyAmplifierWhen listening to the music in stereo,left/right speakers sounds reversed.Low hum or buzzer sound.Sound is only heard from one channel.Sound cuts off during listening to themusic or no sound even th
12、ough power isON.No sound.Low bass response.An unusual hissing noise is heard whenlistening to the broadcast in stereo, but notheard when listening monaurally.Noise is excessive in both stereo andmonaural broadcasts.Sound is distorted and/or the volume levelbecomes low.Excessive distortion in the sou
13、nd of stereobroadcasts.No sound from the Surround speakers.No sound from the center speaker.No sound from the surround back speakerNo suond from the front speaker.Remote control not working.Speakers are connected wrong.Power line of a fluorescent light is installednear this product.One of the input
14、cords is disconnected.The BALANCE control is set to one side.Speaker impedance is less than prescribedfor this unit.A/B Speaker selectors are turned off.Speaker polarity (+/) is reversed.A slight noise may be heard because themethod used for modulation of FM stereobroadcasts is different than that u
15、sed formonaural broadcasts.Poor location and/or direction of theantenna.Transmitting station is too far away.Broadcast signals are being disturbed.Speaker system connections are notcorrect.SURROUND ON/OFF button is set to OFF.Source being played is not recorded orbroadcast in surround sound or stere
16、o.One or more rear speaker wires is notmaking good contact.SURROUND mode button is not set to DOLBYDIGITAL, DTS, DOLBY PRO LOGICII or 3 STEREO.The surround back speaker cableconnection is incomplete Surround modeis not EX/ES mode.Surround back = NONE has been selectedin SPEAKERS Configuration.Short
17、pins not insert EQ jackWhen speaker A and B is selectedSimultaneously, but speaker B is Notconnection.The batteries are exhausted.The remote control unit is too far from thereceiver or out of the effective range.After checking, if needed, reconnect.Place this product as far away as possiblefrom elec
18、tric devices with interference.Connect the input cords securely.Adjust the BALANCE control.After turning off the power and thenturning it on again, reduce the volume orchange to the correct 8 ohm speakers.Press the A or B speaker selector as applicable.Check all speakers for correct polarity. Try re
19、ducing the treble sound by turningthe treble controls. Try changing the location, height and/ordirection of the antenna. Set the FM mode to monaural bypressing the STEREO/MONO button.(Note that the broadcast will then beheard as monaural sound). If an indoor antenna is being used,change to an outdoo
20、r antenna. Try using an antenna with moreelements.Set the button to the desired surroundmode position.Use surround or stereo source.Check all rear speaker wires for goodconnection.Set the button to Dolby Digital EX, DTS/ES,Dolby Pro LogicII or 3 STEREO.Connect the cable correctly.Set surround mode E
21、X/ES Make thecorrect setting.Insert the short pin Connect the speakerboth A and B.Select speaker A onlyReplace with new batteries.Operate the remote control unit within the effective range.TunerSurround EffectsRemote Control Unit The center and rear speakers only operate when the unit is set on a Su
22、rround Sound mode andthe source material being played is recorded or broadcast in Dolby Digital EX, DTS/ES, Dolby Pro LogicIIsurround sound. Stereo broadcasts or recordings will produce some rear channel effects when played in asurround mode. However, mono sources will not produce any sound from the
23、 rear speakers.- 6 -TC9163AF (FUNCTION/INPUT) : IC51BLOCK DIAGRAMLEVEL SHIFTER212341562783123415627831345678910142811121327262524232221201918171615LATCH CIRCUIT SHIFT REGISTER LEVEL SHIFTERLATCH CIRCUIT L-SR-SVssGNDVDDL-SL-SL-SL-COML-SL-SL-COML-SL-SL-COMSTR-SR-SR-SR-COMR-SR-SR-COMR-SR-SR-COMDATACKTC
24、9164AF (FUNCTION/INPUT) : IC53BLOCK DIAGRAMIC INTERNAL DIAGRAMS- 7 -BLOCK DIAGRAMTC9459F(VOLUME) : IC55 LEVEL SHIFTER212134256374121342563741345678910142811121327262524232221201918171615LATCH CIRCUIT SHIFT REGISTER LEVEL SHIFTERLATCH CIRCUIT L-SR-SVssGNDVDDL-SL-COML-SL-SL-COML-SL-SL-COML-SL-COMSTR-S
25、R-COMR-SR-SR-COMR-SR-SR-COMR-SR-COMDATACKLEVEL SHIFTER212134256374121342563741345678910142811121327262524232221201918171615LATCH CIRCUIT SHIFT REGISTER LEVEL SHIFTERLATCH CIRCUIT L-SR-SVssGNDVDDL-SL-COML-SL-SL-COML-SL-SL-COML-SL-COMSTR-SR-COMR-SR-SR-COMR-SR-SR-COMR-SR-COMDATACKTC9162AF (FUNCTIOIC BL
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