Technics-SADX1050-avr-sm 维修电路原理图.pdf

《Technics-SADX1050-avr-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Technics-SADX1050-avr-sm 维修电路原理图.pdf（84页珍藏版）》请在收音机爱好者资料库上搜索。

1、Order No. MD0104077C2AV Control Stereo ReceiverSA-DX1050Colour(K) . Black TypeE . EuropeEB . Great BritainEG . Germany and ItalySPECIFICATIONS1RadioFans.CN 收音机爱 好者资料库 FM Tuner SectionFrequency range87.5-108.0 MHzSensitivityS/N 30 dB1.5 V / 75 S/N 26 dB1.3 V / 75 S/N 20 dB1.2 V / 75 IHF usable sensit

2、ivity (IHF58)1.5 V / 75 IHF 46 dB stereo quieting sensitity22 V / 75 Total harmonic distortionMONO0.2%STEREO0.3%S/NMONO60 dB (73 dB, IHF) STEREO58 dB (67 dB, IHF) Frequency response20 Hz-15 kHz+1 dB, -2 dBAlternate channel selectivity400 kHz 65 dBCapture ratio1.5 dBImage rejection at 98 MHz40 dBIF r

3、ejection at 98 MHz70 dBSpurious response rejection at 98 MHz70 dBAM suppression50 dBStereo separation1 kHz40 dBCarrier leak19 kHz-30 dB (-35 dB, IHF)38 kHz-50 dB (-55 dB, IHF)Channel balance (250 Hz-6.3 kHz)1.5dBLimiting point1.2 VBandwidthIF amplifier180 kHzFM demodulator1000 kHzAntenna terminal75

4、(unbalanced) AM Tuner SectionFrequency range522-1611 kHz (9 kHz steps)530-1620 kHz (10 kHz steps)Sensitivity20 V, 330 V / m Selectivity (at 999 kHz)55 dBIF rejection (at 999 kHz)50 dB Video SectionOutput voltage at 1 V input (unbalanced)10.1 Vp-pMaximum input voltage1.5 Vp-pInput/output impedance75

5、(unbalanced) Amplifier SectionPower output2RadioFans.CN 收音机爱 好者资料库Power output3(at 230V for Continental Europe)(at 240V for the United Kingdom,Australia and New Zealand)DIN 1 kHz (T.H.D. 1%)2 x 100W (6 )20 Hz-20 kHz continuous power outputboth channels driven2 x 80W (6 )Total harmonic distortionrate

6、d power at 20 Hz-20 kHz0.09% (6 )half power at 1 kHz0.03% (6 )Power output at 1 kHz each channel drivenDIN 1kHz (T.H.D.1%)Front2 x 100W (6 )Center100W (6 )Surround2 x 100W (6 )Power bandwidthboth channels driven, -3 dB10 Hz-70 kHz (6 , 0.9%)Damping factor30 (6 )Load impedanceFrontA or B4-16 A and B8

7、-16 Center6-16 Surround6-16 Frequency responsePHONORIAA standard curve (30 Hz-15 kHz)0.8 dBCD ,TAPE/MD ,DVD ,TV ,VCR1 ,VCR210Hz-40 kHz, 3dBInput sensitivity and impeadancePHOTO3 mV / 47 k CD ,TAPE/MD ,DVD ,TV ,VCR1 ,VCR2200 mV / 22 k S/N at rated power (6 )PHONO70 dB (IHF, A: 80 dB)CD ,TAPE/MD ,DVD

8、,TV ,VCR1 ,VCR275 dB (IHF, A: 85 dB)DVD 6CH100 dB (IHF A, Rated Power, S=2 V), 75 dB (IHF, A:85 dB)Output voltageTAPE/MD REC (OUT), VCR 1 OUT200mVTone controlsBASS50 Hz, +10 to -10 dBTREBLE20 kHz, +10 to -10 dBChannel balance (250 Hz-6.3 kHz)1 dBChannel separation 55 dBHeadphones output level and im

9、peadance430 mV / 330 Subwoofer frequency response (-6 dB)7 - 200 HzDigital inputOptical2Coaxicial14 GeneralPower supplyFor Continental EuropeAC 230V, 50 HzFor the United Kingdom, Australia and New ZealandAC 230-240 V, 50 HzPower consumption230 WDimensions (W x H x D)430 x 158 x 375 mm(16-15/16” x 6-

10、7/32” x 14-25/32”)Mass10.0 kg (22 lb.)Power consumption in standby mode:2 WNotes:1. Specifications are subject to change without notice. / Mass and dimensions are approximate.2. Total harmonic distortion is measured by the digital spectrum analyzer.* Manufactured under license from Dolby Laboratorie

11、s. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories.* Manufactured under license from Digital Theater System. “DTS” and “DTS Digital Surround” are trademarks of Digital Theater System. 2001 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copyin

12、g and distribution is a violation of law.1. Before Repair and AdjustmentDisconnect AC power, discharge Power Supply Capacitors C1702 through a 10 , 5 W resistor to ground. DO NOT SHORT-CIRCUIT DIRECTLY (with a screw driver blade, for instance), as this may destroy solid state devices.After repairs a

13、re completed, restore power gradually using a variac, to avoid over current.Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode should be 200600 mA (for E/EG 5only).Current consumption at AC 230 V/240 V, 50 Hz in NO SIGNAL mode should be 200600 mA (for EB only).2. Protection CircuitryThe protec

14、tion circuitry may have operated if either of the following conditions are noticed:- No sound is heard when the power is turned on.- Stops during a performance.The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “short

15、ed”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.If this occurs, follow the procedure outlines below:1. Turn off the power.2. Determine the cause of the problem and correct it.3. Turn on the power once again after one minute.Note:When the

16、 protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.3. AccessoriesAC Main Lead (E/EG). 1 pc. AC Main Lead (EB). 1 pc.AM Loop Antenna Set / . 1 set.6Antenna Plug (EB). 1 set.FM Indoor Antenna. 1 pc.Remote Control / Transmitter. 1 pc.4. Cau

17、tion for AC Mains Lead75. Front Panel Controls5.1. Front Panel85.2. Remote Control96. Disassembly and Main Component Replacement Procedures“ATTENTION SERVICER”Some chassis components maybe have sharp edges. Be careful when diassembling and servicing.101. This section describes procedures for checkin

18、g the operation of the major printed circuit boards and replacing the main components.2. For reassembly after operation checks or replacement, reverse the respective procedures. / Special reassembly procedures are described only when required.3. Select items from the following index when checks or r

19、eplacement are required.Content- Disassembly Procedure for each major P.C.B. P.g. 79- Main Component Replacement Procedures1. Replacement of the Power IC and Regulator Transistor. P.g. 102. Installation of the bottom cover after replacement. P.g. 116.1. Disassembly Procedure for each major P.C.B.Ste

20、p 1 & 2 Unscrew and remove top cabinet as shown.11Step 3 Remove all the screws.Step 4 Release the connectors CP403, CN904B and CN353.12Step 5 & 6 Remove all the screws.Step 7, 8 & 9 Remove all the screws.13Step 10 Remove all the Selector knob and Volume knob, Unscrew the nut and remove all the Selec

21、tor ring and Volume ring.Step 11 Remove all the screws.14Step 12 Release the connector CP771.Step 13 Release the connectors CN702 and CN1000A. Pull up the Digital P.C.B. as shown. / Step 14, 15 & 16 Remove all the screws.15Reverse step 4 until step 16 to reconnect all wires and connectors to test al

22、l P.C.B.6.2. Main Component Replacement Procedures6.2.1. Replacement of the Power IC and Regulator TransistorStep 1 Remove the top cabinet.16Step 2 Cut the joints as shown below. (6 joints)17Step 3 Fold the joints. (6 joints)Step 4 Desolder the terminals of Power IC and Regulator Transistor.18Step 5

23、 Remove all the screws.6.2.2. Installation of the bottom cover after replacement19Step 1 Upset the bottom cover.Step 2 Align the ribs of bottom cover into the bugs.Step 3 Prepare the screws to fix the bottom cover.7. Type Illustrations of ICs, Transistors & Diodes8. Terminal Functions of ICs- IC901

24、(C2BGGF000262) MICROPROCESSOR20Pin No.MarkI/O Function12KEY2KEY1IKey Input 123RDS_CLK-RDS Data IC CLOCK4RDS_DO-RDS Data IC - DATA OUT5RDS_DI-RDS Data IC - DATA IN6RDS_CE-Control of RDS IC(Not used, open)7THRM/OVLD1IThermal/Over load input 18THRM/OVLD2IThermal/Over load input 29SDISD signal detect in

25、put10IF DATAIIF DATA input11TNR_CEO Tuner control (CE) chip enable signal12SFC_ENCD_1ISFC mode encoder input 113SFC_ENCD_2ISFC mode encoder input 214TC9482_CLKO Volume control - CLK15TC9482_DTO Volume control - DT16TC9482_STO Volume control - ST17CNVSS-18RESET-Reset detect terminal19DSP_PASS/DSP_OFF

26、O DSP signal selector20MOS_FET_LEDO MOS FET LED21VSSIGround22XINICrystal oscillator terminal (4 MHz)23XOUTO Crystal oscillator terminal (4 MHz)24VCCIPower supply terminal25VOL_ENCD_1O Volume encoder input 126VOL_ENCD_2O Volume encoder input 227CS4226_CDOUTICS4226 serial data input28CS4226_CSICS4226

27、chip selector29CS4226_OVLERRICS4226 overload error input30CS49326_INTREQICS49326 input request31REMOTEIRemote control terminal32HOLDIBlackout detection terminal33FRONT_VCR IEncoder of surround mode selector input134SEL_ENCD_1ISelector encoder for input 12135SEL_ENCD_2ISelector encoder for input 236T

28、APE_LEDO Tape Selector LED37VCR_LEDO VCR Selector LED38TV_LEDO TV Selector LED39DVD_LEDO DVD Selector LED40CD_LEDO CD Selector LED41TUNER_LEDO TUNER Selector LED42PHONO_LEDO PHONO Selector LED43DIGITAL_LEDO DIGITAL INPUT LED44DVD_6CH_LEDO DVD 6CH LED45LIMITTERO Power limitter control output46TC916x_

29、STBO Selector/Tuner (CK) clock signal47TC916x_TNR_CKO Selector/Tuner/DVD 6CH SW-CK48TC916x_TNR_DTO Selector/Tuner/DVD 6CH SW-DT49S/C SPO Surround/Center speaker control output50SP BO Speaker B control output51SP AO Speaker A control output52RELAYO Relay control output53AF_MUTEO Muting control output

30、54SUBW_MUTEO Subwoofer muting55WAKE_LED-Wake up timer LED (Not used, open)56VCR_MUTEO VCR RECORD MUTE5759NOT USED-NOT USED6078SEG19 SEG1O FL segment signal output7988DEG1 DEG10 O FL digit signal output89VEE-Power supply for FL driver90CS49326_SCDOUTO CS49326 serial data power output91CS49326_CDINICS

31、49326 serial data power input92CS49326_CCLKICS49326 serial clock93CS49326_CSICS49326 chip selector94CS4226_RESETICS4226 reset95CS49326_RESETICS49326 reset96INIT_INIDiode input intial settings97AVSS-Ground98VREF-Reference voltage2299VIDEO_BO Video selector control output B100VIDEO_AO Video selector c

32、ontrol output A9. Block Diagram10. Schematic Diagram(All schematic diagrams may be modified at any time with the development of new technology.)Notes:S301Slide SwitchS950Power SwitchS951Speaker A SwitchS954Timer SwitchS955Memory Switch S956FM Mode SwitchS957Band SwitchS958Preset SwitchS959Tuning Up

33、SwitchS960Tuning Down SwitchS961Speaker B SwitchS962Help/RDS SwitchS963DISP. Sound Mode SwitchS965Digital SwitchS966DVD 6CH SwitchS967+/Right SwitchS968-/Left SwitchS969Tone/Balance SwitchS970Tape Monitor SwitchS971Help Switch- The voltage value and waveforms are the reference voltage of this unit m

34、easured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chassis. Accordingly, there may arise some error in voltage values and waveforms depending upon the internal impedance of the tester or the measuring unit.FM( ).AM- Importance safety notice:Components identifed by m

35、ark have special characteristics important for safety. Furthermore, special parts which have 23purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturers specified parts shown in t

36、he parts list.Caution!IC, LSI and VLSI are sensitive to static electricity.Secondary trouble can be prevented by taking care during repair.- Cover the parts boxes made of plastics with aluminium foil.- Put a conductive mat on the work table.- Ground the soldering iron.- Do not touch the pins of IC,

37、LSI or VLSI with fingers directly.11. Printed Circuit Board12. Wiring Connection Diagram242513. Parts Location and Replacement Parts ListNotes:- Important safety notice:Components identified by mark have special characteristics important for safety.Furthermore, special parts which have purposes of f

38、ire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), 26etc. are used.When replacing any of these components, be sure to use only manufacturerss specified parts shown in the parts list.- The parenthesized indications in the Remarks column specify the areas or color. (Ref

39、er to the cover page for area or color.)Parts without these indications can be used for all areas.- Capacitor values are in microfarad ( F) unless specified otherwise, P=Pico-farads(pF); Farads.- Resistance values are in ohms, unless specified otherwise, 1K=1,000(ohms).- The marking (RTL) indicates

40、that the Retention Time is limited for this item. After the discontinuation of this assembly in production, the item will continue to be available for a specific period of time. The retention period of availability is dependant on the type of assembly, and in accordance with the laws govening part a

41、nd product retention. After the end of this period, the assembly will no longer be available.- M indicates in the Remarks columns indicates parts that are supplied by MESA.- The “(SF)” mark denotes the standard part.- Remote Control Unit: Supply period for three years from terminal of production.- R

42、eference for O/I book languages are as follows : Ar : ArabicCf : Canadian FrenchCz : CzechDa : DanishDu : DutchEn : EnglishFr : FrenchGe : GermanIt : ItalianKo : KoreanPo : PolishRu : RussianSp : SpanishSw : SwedishCo : Traditional ChineseCn : Simplified Chinese13.1. Cabinet13.1.1. Cabinet Parts Loc

43、ation2713.1.2. Cabinet Parts List28Ref. No.Part No.Part Name & DescriptionRemarksCABINET AND CHASSIS1RAN0002EMTUNER MODULEM2REM0080BFAN UNITM3RGB0031-A1LTECH BADGEM4RGK0995-2SSELECTOR RINGM5RGK1337-SVOLUME RINGM6RYQ0363-QHALF MIRROR UNITM8RGL0533-QDIGITAL LIGHT GUIDEM9RGL0535-QMOS LIGHT GUIDEM10RGL0

44、536-QSEL LIGHT GUIDEM11RGP0843C-KFRONT PANELM12RGQ0231-KFAN COVERM13RGR0306G-AREAR PANELMEG E13RGR0306G-BREAR PANELMEB14RGU1390-KVCR2 BUTTONM15RGU1941C-KMODE BUTTONM16RGU1942-KTONE BUTTONM17RGU1945-KDIGITAL BUTTONM18RGU1946-KPOWER BUTTONM19RGU1947-Q6CH BUTTONM20RGW0280-KSELECTOR KNOBM21RGW0359-KVOLU

45、ME KNOBM22RHD26016SCREW (PHONE JACK)M23RHD30070EARTH TERMINALM24RHN90001M9 NUTM25REE1071FCC1 (PANEL-DIGITAL)M26RKA0079A-ALEG UNITM27RKM0373C-KCABINETM28RKQ0089APCB SUPPORTM29RKW0634-QFL WINDOWM30RMC0158-STRANSISTOR HOLDERM31RMK0320-1BOTTOM CHASSISM32RMN0628FL HOLDERM33RMN0630LED HOLDERM34RMN0648PCB

46、SUPPORT 2M35RMN0649WIRE CLAMPERM36RMV0219BARRIERM38RXX0233HEAT SINK UNITM39SHR301WIRE CRAMPERM40SHR9683PCB SUPPORT 1M41SNE2129-3SCREW (CABINET)M42XTB3+20JFZSCREWM43XTB3+35JFZSCREW (FAN)M44XTB3+6GSCREWM45XTB3+8FFZSCREWM46XTB3+8JFZSCREWM47XTBS26+10JSCREWM48XTBS3+8JFZ1SCREWM49XTN26+8GFZSCREW (COBRA COV

47、ER)M50XTW3+15TSCREWM51XTWS3+8TSCREWM54REE1072FCC2 (MAIN-DIGITAL)M55RMQ1030HEAT SINK ANGLEM29Ref. No.Part No.Part Name & DescriptionRemarks57RGL0537-QSTANDBY LIGHT GUIDEM58RMR1165-KSPEAKER COVERM59RMZ0339ZENER COVERM13.2. Components Parts ListRef. No.Part No.Part Name & DescriptionRemarksP.C.B.REP310

48、6E-MSUB-TRANSFORMER P.C.B./MAIN P.C.B./TRANSFORMER P.C.B./PHONO EQ P.C.B./VCR P.C.B./FRONT SPEAKER A P.C.B.MRTL E EGREP3106F-MSUB-TRANSFORMER P.C.B./MAIN P.C.B./TRANSFORMER P.C.B./PHONO EQ P.C.B./VCR P.C.B./FRONT SPEAKER A P.C.B.MRTL EBREP3104H-SS-VIDEO P.C.B./HEADPHONE P.C.B./PANEL P.C.B./LED P.C.B

49、./SWITCH P.C.B.MRTLRAN0002EMTUNER PACK P.C.B.MRTLREP3107S-TDIGITAL P.C.B.MRTLINTEGRATED CIRCUITSIC301NJM2279DIC VIDEO SELECTOR SWMIC302NJM2279DIC VIDEO SELECTOR SWMIC351NJM2279MTE1IC VIDEO SELECTORMIC401TC9163ANIC SELECTORMIC402NJM4580DDIC OP AMPMIC451AN6558FIC OP AMPMIC601RSN310R37-P3 CH HICM IC651

50、RSN313H25-PIC HICM IC901C2BBGF000262IC MICOMMIC970LC72720NIC RDSMIC1001CS49326-CLRIC AC-3/DTS DECODERMIC1002CS4226-KQGIC DIR/DAC/VOLMIC1003SN74LV244APWIC CONVERTERMIC1004SN7AHCT244PWIC CONVERTERMIC1005SN74HCU04APWIC INVERTERMIC1006SNAHC1U04DBVIC OSCILLATORMIC1201NJM2060MTE1IC OP AMPMIC1203NJM4580MTE