Hitachi-HTADD3WUN-avr-sm维修电路原理图.pdf

CAUTION: Beforeservicing this chassis, itisimportantthat the servicetechnician read the“Safety Precautions”and“ProductSafetyNotices”inthisservicemanual. ATTENTION: Avantdeffectuerlentretienduchassis,letechniciendoitlirelesPrcautionsdescurit etlesNoticesdescuritduproduitprsentsdansleprsentmanuel. VORSICHT: VorffnendesGehuseshatderService-IngenieurdieSicherheitshinweise“undHinweise zurProduktsicherheit“indiesemWartungshandbuchzulesen. SERVICE MANUAL MANUEL DENTRETIEN WARTUNGSHANDBUCH DatacontainedwithinthisService manualissubjecttoalterationfor improvement. Les donnes fournies dans le prsent manueldentretienpeuventfairelobjet demodificationsenvuedeperfectionner leproduit. DieindiesemWartungshandbuch enthaltenenSpezifikationenknnensich zwecksVerbesserungenndern. September 2000 AV SURROUND SYSTEM HTADD3E HTADD3EBS HTADD3W HTADD3WUN HTADD3WAU SM0103 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT CONTENTS SPECIFICATIONS.3 SERVICE POINTS.4 WIRING DIAGRAM.9 PRINTED WIRING BOARD.10 SCHEMATIC DIAGRAM.25 EXPLODED VIEW.43 REPLACEMENT PARTS LIST.47 ADJUSTMENT.8 BLOCK DIAGRAM.23 RadioFans.CN 收音机爱 好者资料库 ENGLISH SAFETY PRECAUTIONS WARNING: The 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 service 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 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 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 lengths. 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 dielectric 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 electrical 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 parts 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 original 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 tube. 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 high 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-radiation. 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 should 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. - 1 - RadioFans.CN 收音机爱 好者资料库 HTA-DD3 ? ? ? ? Checking method ? ? ? ?!?# ? ? ?$%? INSTRUMENT (Exposed part) Insulation tester (DC 500V) ? ?:? Usablesensitivity:?8+?-?(*?08+?0?.?(*;?(*?!?1?%?2?%(? ? ?:? Power consumption:?+,(0=?$%?)?-#-?=?. ?$%?)? %0?%?)?:?%#G?%=?$ ?3;3HB;36H0=?$%?)?-#-?=?. ?$%?)? %0?%?)?:?%#G?%=?$ 6?+;+,($?)?%?G#? ?G?)? :?)?:?%#G?%=?$ ?3;3HB;36H$?)?%?G#? ?G?)? :?)?:?%#G?%=?$ A D J U S T M E N T S ?G? HTA-DD3 WIRING DIAGRAM FL DISPLAY UNIT CN2B CN1B CN1A CN1BCN2A W17A W15A W16A W18A W14A W19A W13A CN204 CN204A CN201A CN14 CN12 TUNER/VOL UNIT AUDIO IN. UNIT DIGITAL IN. UNIT VIDEO(C)IN. UNIT VIDEO(S)IN. UNIT MAIN UNIT CN22 PG22 PG13 CN205 THERMAL UNIT VIDEO(COMP.)IN. UNIT SPEAKER OUT. UNIT CN206 PG14 CN201 DSP UNIT PG205 PG206 W19B W18B W17B W16B W15B W14B W13B POWER T.(2nd) UNIT W5B W7B W9B W6B W8B W10B W4B POWER T.(Pry.) UNIT POWER CONTROL UNIT PG3 CN13 CN3 PHONES/SPEAKER SW UNIT POWER SW UNIT *PG15 PG12 W3A W1A W1BW2B W6AW7A W10A W9AW8A W3B W2A POWER CORD PG25 *VOLTAGE SELECTOR (for W, WUN, WAU) REMARKS * SHOULD BE FOLLOW PWB ASSY. *CN15 HTA-DD3 PRINTED WIRING BOARD - 10 - Soldering Side MAIN PWB HTA-DD3 - 11 - Component Side MAIN PWB HTA-DD3 Soldering Side Tuner PWB - 12 - HTA-DD3 Component Side Tuner PWB - 13 - HTA-DD3 Soldering Side Component Side Audio PWB - 14 - HTA-DD3 Relay PWB Soldering Side Component Side - 15 - HTA-DD3 Digital PWB Power PWB Component Side FL PWB - 16 - HTA-DD3 Soldering Side FL PWB Power PWB Digital PWB HTA-DD3 Component Side Soldering Side Component PWB HTA-DD3 Component Side Soldering Side DSP PWB HTA-DD3 S-Video PWB Composit PWB PT2 PWB Soldering Side HTA-DD3 S-Video PWB Composit PWB PT2 PWB Component Side HTA-DD3 Soldering SideComponent Side Phone PWB PT1 PWB P-SW PWB Phone PWB PT1 PWB P-SW PWB ?-? HTA-DD3 BLOCK DIAGRAM FR 2. : ANALOG SIGNAL, : DIGITAL SIGNAL, : VIDEO SIGNAL 0dB 0dB +6dB 12dB0dB +6dB +6dB +6dB +6dB 0dB 0dB +6dB +4dB +4dB -6dB 0dB 0dB 0dB +4.5dB+10.5dB +10dB +10dB+28dB +28dB +28dB +28dB +14dB +14dB 0dB 0dB +14dB +21dB 0dB 0dB REMARKS 1. THIS DRAWING IS THE HTA-DD3 CIRCUIT BLOCK (LEVEL) DIAGRAM. 3. : u-COM CONTROL SIGNAL +28dB ANALOG PHONO RIAAFUNCTION SW IC102 BA4558 BF H. P. F BA15218TC9273F-007 CD DVD/VDP TV/DBS VCR MD/TAPE 200mV/47k 200mV 50mV 200mV BA4558 BF BA15218BA15218 ADC +IN BFA/D IC202 ERR MUTE SR BA15218 CODEC AK4527 D/A SL C BA15218 FR BA15218 SW FL ADC -IN TAPE RACK VCR REC LA1838 TUNER BLOCK LC7272ON SPFRX SDASDB-SDD BU4066BC NJM2267ROM DVD/VDP BA15218 BA15218 IC951 96KHz CONT NJM2068x3 ELE. VOL CH. TRIM NJM2068x3 DTS SEL (CD/DVD) F GAIN SW PO. AMP MIX. AMP MIX. AMP MIX. AMP BA15218 SW SW SR SL SL SR STEREO 6CH EXT. IN SEL. STEREO (WHEN SW) C CFL BFLC7536x3 BF BF BF BF BF PO. AMP PO. AMP PO. AMP TONE CONT.1V TONE CONT. MAIN AMP IC50 IC40 24. 5V 200mV/22k MAIN AMP MAIN AMP MAIN AMP MAIN AMP VOL. MUTE SUBWOOFER MUTE HP RELAY SP. RELAY 2V HONES Rch HONES Lch FRONT Rch CENTER SUBWOOFER PRE OUT FRONT Lch SURROUND Rch SURROUND Lch SURROUND Rch SUBWOOFER SURROUND Lch CENTER CENTER FRONT Rch-B FRONT Rch-A FRONT Lch-B FRONT Rch FRONT Lch 6ch EXT. IN FRONT Lch-A DVD TV/DBS COMPONENT VIDEO BU4066BC VCR REC MONITOR OUTPUT COMPONENT VIDEO FUNCTION MONITOR OUTPUT BA15218 PO.AMP PO.AMP PO.AMP FL FR NJM2267 MIX. AMPL. P. F TV/DBS VCR IC611 S. VIDEOS. VIDEO FUNCTION IC201 VIDEO DVD/VDPVCR REC TV/DBSMONITOR OUTPUT VCR VIDEO FUNCTION OPT CD OPT DVD OPT TV TC74HCU04AF TC74HC151F DIGITAL INPUT SEL. DIGITAL INPUT IC92 RDS (E, EBS) IC203 DSP (ZR38650) ?.? HTA-DD3 HTA-DD3 A A 1 1 35 1 1 32 31 28 6 OUTLET P.W.B. 5 AM LOOP ANTENNA 8T Remote Control EDISON PLUG ADAPTERFM ANT 48 38 40 47 39 FL DISP PWB 13 15 12 46 42 37 41 23 36 21 36 20 22 B B 10 11 30 45 19 44 9 16 18 27 27 18 29 B B A A SHIELD PLATE (E/EBS) (W/WUN) VOLTAGE SELECTOR (W/WUN) 24 33 49 43 2 51 50 34 8 25 RELAY P.W.B. 2 4 3 17 26 (E, EBS)43 COMPONENT P.W.B. S-VIDEO P.W.B. COMPOSIT P.W.B. AUDIO P.W.B. DSP P.W.B. TUNER P.W.B. 7 52 P-SW1 P.W.B. 14 MAIN P.W.B. EXPLODED VIEW (Cabinet Chassis) Nos. are reference Nos. of part list I?.-?II?.?I THE UPDATED PARTS LIST FOR 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. 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