Hitachi-HTADD1W-avr-sm 维修电路原理图.pdf

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1、CAUTION:Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual.ATTENTION:Avant deffectuer lentretien du chassis, le technicien doit lire les Prcautions de scurit et les Notices de scurit du produit

2、prsents dans le prsent manuel.VORSICHT:Vor ffnen des Gehuses hat der Service-Ingenieur die Sicherheitshinweise“ und Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.SERVICE MANUALMANUEL DENTRETIENWARTUNGSHANDBUCHData contained within this Service manual is subject to alteration fo

3、r improvement.Les donnes fournies dans le prsent manuel dentretien peuvent faire lobjet de modifications en vue de perfectionner le produit.Die in diesem Wartungshandbuch enthaltenen Spezifikationen knnen sich zwecks Verbesserungen ndern.September 2000AV SURROUND RECEIVERPARTS ARE SUBJECT TO CHANGE

4、FOR IMPROVEMENTCONTENTSSPECIFICATIONS.4SERVICE POINTS . .5ADJUSTMENTS .9WIRING DIAGRAM. .11PRINTED WIRING BOARD . .12CIRCUIT DIAGRAM.22BLOCK DIAGRAM . .28EXPLODED VIEW.29REPLACEMENT PARTS LIST . .30SM0102HTADD1EHTADD1EBSHTADD1WHTADD1WUNRadioFans.CN 收音机爱 好者资料库 ENGLISH SAFETY PRECAUTIONS WARNING: The

5、following precautions must be observed.ALL PRODUCTS Before any service is performed on the chassis an isolation transformer should be inserted between the power line and the product. 1. When replacing the chassis in the cabinet, ensure all the protective devices are put back in place. 2. When servic

6、e is required, observe the original lead dressing. Extra precaution should be taken to ensure correct lead dressing in any high voltage circuitry area. 3. Many electrical and mechanical parts in HITACHI products have special safety related characteristics. These characteristics are often not evident

7、 from visual inspection, nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified by marking with a ? on the schematics and the replacement

8、parts list. The use of a substitute replacement component that does not have the same safety characteristics as the HITACHI recommended replacement one, shown in the parts list, may create electrical shock, fire, X-radiation, or other hazards. 4. Always replace original spacers and maintain lead len

9、gths. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of overheating. 5. Insulation resistance should not be less than 2M ohms at 500V DC between the main poles and any accessible metal parts. 6. No flashover or breakdown should occur during the diele

10、ctric strength test, applying 3kV AC or 4.25kV DC for two seconds between the main poles and accessible metal parts. 7. Before returning a serviced product to the customer, the service technician must thoroughly test the unit to be certain that it is completely safe to operate without danger of elec

11、trical shock. The service technician must make sure that no protective device built into the instrument by the manufacturer has become defective, or inadvertently damaged during servicing. CE MARK 1. HITACHI products may contain the CE mark on the rating plate indicating that the product contains pa

12、rts that have been specifically approved to provide electromagnetic compatibility to designated levels. 2. When replacing any part in this product, please use only the correct part itemised in the parts list to ensure this standard is maintained, and take care to replace lead dressing to its origina

13、l state, as this can have a bearing on the electromagnetic radiation/immunity. PICTURE TUBE 1. The line output stage can develop voltages in excess of 25kV; if the E.H.T. cap is required to be removed, discharge the anode to chassis via a high value resistor, prior to its removal from the picture tu

14、be. 2. High voltage should always be kept at the rated value of the chassis and no higher. Operating at higher voltages may cause a failure of the picture tube or high voltage supply, and also, under certain circumstances could produce X-radiation levels moderately in excess of design levels. The hi

15、gh voltage must not, under any circumstances, exceed 29kV on the chassis (except for projection Televisions). 3. The primary source of X-radiation in the product is the picture tube. The picture tube utilised for the above mentioned function in this chassis is specially constructed to limit X-radiat

16、ion. For continued X-radiation protection, replace tube with the same type as the original HITACHI approved type 4. Keep the picture tube away from the body while handling. Do not install, remove, or handle the picture tube in any manner unless shatterproof goggles are worn. People not so equipped s

17、hould be kept away while picture tubes are handled LASERS If the product contains a laser avoid direct exposure to the beam when the cover is open or when interlocks are defeated or have failed. RadioFans.CN 收音机爱 好者资料库WARNINGCheck that exposed parts are acceptably insulated from the supply circuit b

18、efore returning the repaired instrument to the customer.CHECKING METHODMeasure the resistance value between the both poles of attachment cup (power supply plug) and the exposed parts (parts such as covers etc. where the customer can easily touch) and check that the resistance value is 500k ohms or m

19、ore.SAFETY PRECAUTIONSThe following precautions should be observed when servicing.Since many parts in the unit have special safety related characteristics, always use genuine HITACHI replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers. Cri

20、tical parts are marked with a ? in the circuit diagram and printed wiring board.Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain that it is completely safe to operate without danger of electrical shock.SPECIFICATIONS Audio section Vi

21、deo section Tuner section General Remote control unit (RB-DD1S)(Power amplifier)Rated output:Front:60 W + 60 W(8W/ohms, 20 Hz 20 kHz with 0.08 % T.H.D.)Centre:60 W(8W/ohms, 20 Hz 20 kHz with 0.08 % T.H.D.)Surround:60 W + 60 W(8W/ohms, 20 Hz 20 kHz with 0.08 % T.H.D.)Output terminalsFront:A or B8 to

22、16W/ohmsA + B16W/ohms or moreCenter/Surround:8 to 16W/ohms(Analog)LINE input - PRE OUTInput sensitivity / input impedance:200 mV / 47 kW/kohmsFrequency response:10 Hz 50 kHz: +1, 3 dBS/N ratio:92 dB (IHF-A weighted)Total harmonic distortion:0.08 % (20 Hz 20 kHz)Rated output:1.2 VPHONO input-REC OUTI

23、nput sensitivity / input impedance:2.5 mV / 47 kW/kohmsRIAA deviation:1 dB (20 Hz 20 kHz)S/N ratio:74 dB (IHF-A weighted, with 5 mV input)Total harmonic distortion:0.03 % (1 kHz, 3 V)Rated output / Maximum output:150 mV / 7V(standard video jacks)Input/output level and impedance:1 Vp-p, 75 W/ohmsFreq

24、uency response:5 Hz 10 MHz +1, 3 dB-15 FM (note: V at 75 W/ohms, 0 dBf = 1 10W)AMReceiving range:87.50 MHz 108 MHz (0.05 MHz step)522 kHz 1611 kHz (9 kHz step) (E, EBS), 522 kHz 1611 kHz(9 kHz step) (W, WUN)520 kHz 1710 kHz(10 kHz step) (W, WUN)Usable sensitivity:1.0 V (11.2 dBf)18 V50 dB quieting s

25、ensitivity:MONO1.6 V (15.3 dBf)STEREO23 V (38.5 dBf)S/N ratio:MONO80 dB (IHF-A weighted)STEREO75 dB (IHF-A weighted)Total harmonic distortion:MONO0.2 % (1 kHz)STEREO0.4 % (1 kHz)Power supply:AC 230 V, 50 Hz (E, EBS), AC 115/230 V, 50/60 Hz (W, WUN)Power consumption:180 WMaximum external dimensions:4

26、34 (W) 144 (H) 320 (D) mmWeight:7.1 kgBatteries:R6P/AA Type (two batteries)External dimensions:54 (W) 172 (H) 27.2 (D) mmWeight:100 g (including batteries) Accessory suppliedOperating instructions, Remote control unit (RB-DD1S),R6P/AA batteries, AM loop antenna and FM indoor antenna * For purposes o

27、f improvement, specifications and design are subject to change without notice.1x 221x 2x 4Top cover3x 234x 119x 5Real plateSERVICE POINTS1.Removal of Top Cover(a)Remove 4 screws 2 from the rear plate.(b)Remove 2 screws 1 from each side.2.Removal of the Rear Plate(a)Remove 23 screws 3 and 1 screw 4 f

28、rom the rear plate.(b)Remove 5 screws + from the Bottom Chassis.Fig. 1Fig. 2Connectors x 8Tuner PWBFlat cableDSP PWBVideo PWBDigital PWBZx 1Flat Cable x 110 x 68x 39x 17x 518x 46x 17Claws (PWB Support)83.Removal of Tuner/DSP/Video/Digital PWB Board(a)Remove the Flat cable Z at the Tuner PWB.(b)Gentl

29、y pull the Tuner/DSP/Video PWB Board upwards to detach 8 connectors from Main PWB Board.(c)Detach the connector from DSP PWB Board to remove the Digital PWB.4. Removal of Heat Sink and Transformer(a)Invert the Bottom Chassis, remove 2 screws 5 connect to the heat sink. (Fig. 5)(b)Remove 4 screws 6 a

30、nd pull the transformer upward together with the Power PWB section.5.Removal of Power PWB Board(a)Remove 1 screw 7 from the Bottom Chassis at the side.(b)Release board from its 3 holding claws (PWB SUPPORT) and gently pull the board free.6.Removal of Main PWB Board(a)Detach Flat cable from FL PWB Bo

31、ard.(b)Remove 6 screws 8 to release the transistors from the heat sink.(c)Remove 3 screws 9 to release the bracket from the heat sink.(d)Remove 1 screw ! to release the main PWB from the Bottom Chassis.7.Removal of Surround PWB(a)Remove 5 screws to release surround PWB from the heat sink.Fig. 3Fig.

32、4511x 4x 212 x 1Bottom ChassisBass/Treble KnobMaster Vol.Front Panel1313x 116x 2x 114 x 1115x 2Nut x 2Nut x 1Inner Panel8.Removal of Front Panel (a)Invert the Bottom Chassis and remove 4 screws .(b)Remove the Master Vol. & Bass/Treble Knob before remove the Front panel.9.Removal of Inner Panel, Powe

33、r Switch, Phone Jack and FL PWB(a)Release the inner panel from the Bottom Chassis by remove 1 screw # (Fig. 5) and 2 screws $.(b)Remove 11 screws % and 3 nuts to release the FL board.(c)Remove 2 screws & to release the Power Switch.(d)Remove 2 screws ( to release the Phone Jack.Fig. 5Fig. 617x 410.

34、Removal of Foot(a)Remove 4 screws ) to remove foot.Fig. 7ADJUSTMENTS1) FM DiscriminatorMeasuring instrument and condition.2) Voltage of covering (Reference)Measuring instrument and condition.Input Terminal Output Terminal Measuring InstrumentFrequencyAdjustReadingFM Antenna* R22DC Balance Meter98.1M

35、HzT4030mV1kHz, 60 dB22.5kHz dev.BandDestinationFrequencySpecificationNoteLimit (V)Average (V)FM50 kHz step87.50 MHz1.3 - 3.72.3E, EBS, W,WUN108.00 MHz6.0 - 9.07.5AM10 kHz step520 kHz0.9 - 1.21.0W,WUN1,710 kHz6.0 - 9.07.59 kHz step522 MHz0.9 - 1.21.0E, EBS, W, WUN1,611 kHz6.0 - 9.07.5*R22DC balance m

36、eterTEST PTBL1R513) Idling voltage (No adjustment is needed)Test pointsa) Front left channel (MAIN PWB)b) Front right channel (MAIN PWB)c) Center channel (MAIN PWB)d) Surr left channel (SURR PWB)e) Surr right channel (SURR PWB)ConditionMaster volume : - (min)Temperature : 15 30CReading (SPEC)1) POWE

37、R ON AFTER ONE MIN.0.5 2.0 mV2) STABLE 1 HOUR0.8 8 mVIF THIS IDLING VOLT - 0.4 mVR625 (SURROUND LEFT)R626 (SURROUND RIGHT)R529 (FRONT LEFT)R530 (FRONT RIGHT)R416 (CENTER)NEED TO CUT AWAYIF 2.1 mVNEED TO ADD ABOVE RESISTOR(IF DONT HAVE ABOVE RESISTOR)C522L501JP51310K +10KJP514K42610K +10KR429L401RY40

38、1JP40710K +10KR63910K+ 10KR64010K+ 10KSM0102WIRING DIAGRAMSM0102TUNER PCBSM0102SURR PCBSM0102DSP PCBSM0102FL PCBSM0102POWER PCBSM0102VIDEO PCBSM0102SPJK PCBSM0102SW-H-P PCBSM0102DIGITAL IN PCBSM0102MAIN CIRCUITSM0102DISP / TONE CIRCUITSM0102SURROUND MAIN AMP CIRCUITSM0102TUNER / VOLUME CIRCUITSM0102

39、DSP CIRCUITSM0102POWER SUPPLY / VIDEO CIRCUITAccessoriesAM LOOP ANTENNA 8TRemote ControlEDISON PLUG ADAPTERFM ANT38394047(W/WUN)VOLTAGE SELECTOR(W/WUN)45248414319463637423315141613FL DISP PWB4420112912213232BB2223BABA5262717355024TRANSFORMER7POWER CAUTION662434925(E, EBS)(E, EBS)45TUNER P.W.B.VIDEO

40、P.W.B.DSP P.W.B.1089MAIN P.W.B.341811AAAA11313028 THE UPDATED PARTS LISTFOR THIS MODEL IS AVAILABLE ON ESTA Hitachi, Ltd. Tokyo, Japan International Sales Division THE HITACHI ATAGO BUILDING, No. 15 12 Nishi Shinbashi, 2 Chome, Minato Ku, Tokyo 105-8430, Japan. Tel: 03 35022111 HITACHI EUROPE LTD, W

41、hitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA UNITED KINGDOM Tel: 01628 643000 Fax: 01628 643400 Email: consumer-servicehitachi- HITACHI EUROPE S.A. 364 Kifissias Ave. & 1, Delfon Str. 152 33 Chalandri Athens GREECE Tel: 1-6837200 Fax: 1-6835964 Email: service.hellashitachi- HITACHI

42、 EUROPE GmbH Munich Office Dornacher Strasse 3 D-85622 Feldkirchen bei Mnchen GERMANY Tel: +49-89-991 80-0 Fax: +49-89-991 80-224 Hotline: +49-180-551 25 51 (12ct/min) Email: HSE-DUS.servicehitachi- HITACHI EUROPE S.A. Gran Via Carlos III, 101-1 08028 Barcelona SPAIN Tel: 93 409 2550 Fax: 93 491 351

43、3 Email: atencion.clientehitachi- HITACHI EUROPE srl Via Tommaso Gulli N.39, 20147 Milano, Italia ITALY Tel: +39 02 487861 Tel: +39 02 38073415 Servizio Clienti Fax: +39 02 48786381/2 Email: customerservice.italyhitachi- HITACHI Europe AB Box 77 S-164 94 Kista SWEDEN Tel: +46 (0) 8 562 711 00 Fax: +

44、46 (0) 8 562 711 13 Email: csgswehitachi- HITACHI EUROPE S.A.S Lyon Office B.P. 45, 69671 BRON CEDEX FRANCE Tel: 04 72 14 29 70 Fax: 04 72 14 29 99 Email: france.consommateurhitachi- HITACHI EUROPE LTD (Norway) AB STRANDVEIEN 18 1366 Lysaker NORWAY Tel: 67 5190 30 Fax: 67 5190 32 Email: csgnorhitach

45、i- HITACH EUROPE AB Egebkgrd Egebkvej 98 DK-2850 Nrum DENMARK Tel: +45 43 43 6050 Fax: +45 43 60 51 Email: csgnorhitachi- HITACHI EUROPE AB Neopoli / Niemenkatu 73 FIN-15140 Lahti FINLAND Tel : +358 3 8858 271 Fax: +358 3 8858 272 Email: csgnorhitachi- Hitachi Europe Ltd Bergensesteenweg 421 1600 Sint-Pieters-Leeuw BELGIUMTel: +32 2 363 99 01 Fax: +32 2 363 99 00 Email: sofie.van.bomhitachi- HITACHI EUROPE LTD Na Sychrove 975/8 101 27 Praha 10 Bohdalec CZECH REPUBLIC Tel: +420 267 212 383 Fax: +420 267 212 385 Email: csgnorhitachi-