Hitachi-HTADD1-asr-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 produ

2、it 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 MANUAL MANUEL DENTRETIEN WARTUNGSHANDBUCH Data contained within this Service manual is subject to alte

3、ration for 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 2000 AV SURROUND RECEIVER HTA-DD1E HTA-D

4、D1EBS HTA-DD1W HTA-DD1WUN SM0102 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT CONTENTS SPECIFICATIONS.4 SERVICE POINTS.5 ADJUSTMENTS .9 WIRING DIAGRAM.11 PRINTED WIRING BOARD .12 CIRCUIT DIAGRAM.22 BLOCK DIAGRAM.28 EXPLODED VIEW.29 REPLACEMENT PARTS LIST .30 RadioFans.CN ENGLISH SA

5、FETY 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 pu

6、t 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 charac

7、teristics 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

8、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 origina

9、l 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 breakdow

10、n 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

11、 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 indicati

12、ng 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 repla

13、ce 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

14、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

15、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 speciall

16、y 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

17、 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. RadioFans.CN WARNING Check that exposed parts are acceptably insulated fro

18、m the supply circuit before returning the repaired instrument to the customer. CHECKING METHOD Measure 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

19、 value is 500k ohms or more. SAFETY PRECAUTIONS The 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 repl

20、aced with other makers. Critical 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. Ra

21、dioFans.CN SPECIFICATIONS Audio section Video 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

22、.08 % T.H.D.) Output terminalsFront:A or B8 to 16W/ohms A + B16W/ohms or more Center/Surround:8 to 16W/ohms (Analog) LINE input - PRE OUT Input sensitivity / input impedance:200 mV / 47 kW/kohms Frequency response:10 Hz 50 kHz: +1, 3 dB S/N ratio:92 dB (IHF-A weighted) Total harmonic distortion:0.08

23、 % (20 Hz 20 kHz) Rated output:1.2 V PHONO input-REC OUT Input sensitivity / input impedance:2.5 mV / 47 kW/kohms RIAA 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 vid

24、eo jacks) Input/output level and impedance:1 Vp-p, 75 W/ohms Frequency response:5 Hz 10 MHz +1, 3 dB -15 FM (note: V at 75 W/ohms, 0 dBf = 1 10W)AM Receiving 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

25、 step) (W, WUN) Usable sensitivity:1.0 V (11.2 dBf)18 V 50 dB quieting sensitivity: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 11

26、5/230 V, 50/60 Hz (W, WUN) Power consumption:180 W Maximum external dimensions:434 (W) 144 (H) 320 (D) mm Weight:7.1 kg Batteries:R6P/AA Type (two batteries) External dimensions:54 (W) 172 (H) 27.2 (D) mm Weight:100 g (including batteries) Accessory supplied Operating instructions, Remote control un

27、it (RB-DD1S), R6P/AA batteries, AM loop antenna and FM indoor antenna * For purposes of improvement, specifications and design are subject to change without notice. 1 x 2 2 1 x 2 x 4 Top cover 3 x 23 4 x 1 19 x 5 Real plate SERVICE POINTS 1.Removal of Top Cover (a)Remove 4 screws 2 from the rear pla

28、te. (b)Remove 2 screws 1 from each side. 2.Removal of the Rear Plate (a)Remove 23 screws 3 and 1 screw 4 from the rear plate. (b)Remove 5 screws + from the Bottom Chassis. Fig. 1 Fig. 2 Connectors x 8 Tuner PWB Flat cable DSP PWB Video PWB Digital PWB Z x 1 Flat Cable x 1 10 x 6 8 x 3 9 x 17 x 518 x

29、 46 x 17 Claws (PWB Support) 8 3.Removal of Tuner/DSP/Video/Digital PWB Board (a)Remove the Flat cable Z at the Tuner PWB. (b)Gently 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

30、 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 and 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

31、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 Board. (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

32、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. 3 Fig. 4 5 11 x 4 x 2 12 x 1 Bottom Chassis Bass/Treble Knob Master Vol. Front Panel 13 13x 1 16x 2 x 1 14 x 11 15x 2 Nut x 2 Nut x 1 Inner Panel 8.Removal of F

33、ront 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, Power 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)R

34、emove 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. 5 Fig. 6 17x 4 10. Removal of Foot (a)Remove 4 screws ) to remove foot. Fig. 7 ADJUSTMENTS 1) FM Discriminator Measuring instrument and conditi

35、on. 2) Voltage of covering (Reference) Measuring instrument and condition. Input Terminal Output Terminal Measuring InstrumentFrequencyAdjustReading FM Antenna* R22DC Balance Meter98.1MHzT4030mV 1kHz, 60 dB 22.5kHz dev. BandDestinationFrequencySpecificationNote Limit (V)Average (V) FM50 kHz step87.5

36、0 MHz1.3 - 3.72.3 E, EBS, W,WUN108.00 MHz6.0 - 9.07.5 AM10 kHz step520 kHz0.9 - 1.21.0 W,WUN1,710 kHz6.0 - 9.07.5 9 kHz step522 MHz0.9 - 1.21.0 E, EBS, W, WUN1,611 kHz6.0 - 9.07.5 *R22 DC balance meter TEST PT BL1 R51 3) Idling voltage (No adjustment is needed) Test points a) Front left channel (MAI

37、N PWB) b) Front right channel (MAIN PWB) c) Center channel (MAIN PWB) d) Surr left channel (SURR PWB) e) Surr right channel (SURR PWB) Condition Master volume : - (min) Temperature : 15 30C Reading (SPEC) 1) POWER ON AFTER ONE MIN. 0.5 2.0 mV 2) STABLE 1 HOUR 0.8 8 mV IF THIS IDLING VOLT - 0.4 mV R6

38、25 (SURROUND LEFT) R626 (SURROUND RIGHT) R529 (FRONT LEFT) R530 (FRONT RIGHT) R416 (CENTER) NEED TO CUT AWAY IF 2.1 mV NEED TO ADD ABOVE RESISTOR (IF DONT HAVE ABOVE RESISTOR) C522 L501 JP513 10K + 10K JP514 K426 10K + 10K R429 L401 RY401 JP407 10K + 10K R639 10K + 10K R640 10K + 10K SM0102WIRING DI

39、AGRAM SM0102TUNER PCB SM0102SURR PCB SM0102DSP PCB SM0102FL PCB SM0102POWER PCB SM0102VIDEO PCB SM0102SPJK PCB SM0102SW-H-P PCB SM0102DIGITAL IN PCB SM0102MAIN CIRCUIT SM0102DISP / TONE CIRCUIT SM0102SURROUND MAIN AMP CIRCUIT SM0102TUNER / VOLUME CIRCUIT SM0102DSP CIRCUIT SM0102POWER SUPPLY / VIDEO

40、CIRCUIT Accessories AM LOOP ANTENNA 8T Remote Control EDISON PLUG ADAPTERFM ANT 3839 40 47 (W/WUN) VOLTAGE SELECTOR (W/WUN) 45 2 48 41 43 19 46 36 37 42 33 15 14 16 13 FL DISP PWB 44 20 11 29 12 21 32 32 B B 22 23 B A B A 5 26 27 17 35 50 24 TRANSFORMER 7 POWER CAUTION 6 6 2 4 3 49 25 (E, EBS) (E, E

41、BS) 45 TUNER P.W.B. VIDEO P.W.B. DSP P.W.B. 10 8 9 MAIN P.W.B. 34 18 1 1 A A A A 1 1 31 30 28 REPLACEMENT PARTS LIST PRODUCT SAFETY NOTE: Components marked with a ? have special characteristics important to safety. Before replacing any of these components, please read carefully the Service Manual. A

42、BBREVIATIONS Capacitors . CK45: Disk capacitor, CK73: Chip capacitor (E-12 series), CK14: Axial capacitor, CQ: Polyester film capacitor, CE: Electrolytic, CC73: Chip capacitor (E-24 series) Resistors. RD: Axial resistor, RN: Non-burn resistor, RMC73: Chip resistor, RE: Standing resistor, FR: Fuse Re

43、sister Semiconductor . TR:Transistor, DI: Diode, ZD: Zener diode, VA: Varistor, TH: Thermistor, IC: IC C54 0890085R CER CAP B 680PF 50V K W, WUN C55 0890075R CER CAP SL 120PF 50V J E, EBS C56 0890101R CER CAP B 10000PF 16V K C57 0890101R CER CAP B 10000PF 16V K C59 0890101R CER CAP B 10000PF 16V K C

44、60 0890101R CER CAP B 10000PF 16V K C61 0890096R CER CAP B 4700PF 25V K E, EBS C62 0890096R CER CAP B 4700PF 25V K E, EBS C65 0890101R CER CAP 10000PF 16V K C87 0800018Y ELECT CAP SSL 10F 50V C91 0800005Y ELECT CAP SSL 2.2F 50V E, EBS C92 0890084R CER CAP B 560PF 50V K E, EBS C93 0890101R CER CAP B

45、10000PF 16V K E, EBS C94 0800018Y ELECT CAP SSL 10F 50V E, EBS C95 0890119R CER CAP CH 27PF 50V J E, EBS C96 0890119R CER CAP CH 27PF 50V J E, EBS C97 0800018Y ELECT CAP SSL 10F 50V E, EBS C101 0893132R CHIP CAP 39CH 220PF J 50V C102 0893132R CHIP CAP 39CH 220PF J 50V C103 0800018Y ELECT CAP SSL 10F 50V C104 0800018Y ELECT CAP SSL 10F 50V C105 0893126R CHIP CAP 39CH 100PF K 50V C106 0893126R CHIP CAP 39