Hitachi-HTDK160-mc-sm2 维修电路原理图.pdf
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1、SM9209SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTDVD DIGITAL THEATRE SYSTEMSERVICE MANUAL2002November Digital Media DivisionHTDK160STAN DBYDVDTUNERAUX2580SLEEPREPEATA-BN/PMENU/PB CSLOW/MEMORYZoomEQLanguageAUDIOGoToSubTitleANGLEReturnDISP LAYMUT ESEL ECTADJ /VOLSET UPTITL EPLAY /PA
2、U SEOPE N/CL OSEPRO GLIST ENIN GENTPOWERREMOTE CONTROLLE RRB-HTDK160STANDBYRadioFans.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
3、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 e
4、lectrical 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.
5、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
6、 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 les
7、s 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 th
8、e 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 inadvertentl
9、y 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 on
10、ly 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 t
11、he 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 o
12、r 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
13、 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 whil
14、e 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 interl
15、ocks are defeated or have failed. RadioFans.CN 收音机爱 好者资料库CONTENTS1 GENERAL INFORMATION . E1-11-1 SPECIFICATIONS . E1-11-2 CONTROLLING VERSION OF FIRMWARE . E1-21-3 REPAIR INSTRUCTIONS . E1-32 EXPLODED VIEW .2-12-1 MAIN UNIT . 2-12-2 SUBWOOFER .2-23 REPLACEMENT PARTS LIST .3-13-1 MAIN UNIT SECTION .
16、3-13-1-1 MECHANICAL PARTS LIST .3-13-1-2 ELECTRICAL PARTS LIST . 3-2TUNER . 3-2SCART . 3-3KEY PANEL . 3-4POWER . 3-5MAIN .3-63-2 SUBWOOFER SECTION .3-93-2-1 MECHANICAL PARTS LIST .3-93-2-2 ELECTRICAL PARTS LIST . 3-10AMP & JACK . 3-10POWER . 3-10SCHEMATIC, CIRCUIT BOARD AND BLOCK DIAGRAMS . 11 MAIN
17、UNIT SECTION . 11-1 WIRING DIAGRAM . 11-2 BLOCK DIAGRAM . 21-3 SCHEMATIC DIAGRAMS . 3TUNER . 3SCART . 4KEY PANEL .5POWER . 6MAIN . 71-4 IC BLOCK DIAGRAMS .111-5 CIRCUIT BOARD DIAGRAMS .16TUNER . 16SCART . 18KEY PANEL .19POWER .20MAIN . 212 SUBWOOFER SECTION .232-1 WIRING DIAGRAM . 232-2 BLOCK DIAGRA
18、M . 242-3 SCHEMATIC DIAGRAMS . 25AMP & JACK . 25POWER .262-4 CIRCUIT BOARD DIAGRAMS .27AMP & JACK . 27POWER .28E1 - 1DVD Player Pickup Semiconductor laser, Wavelength 650 mm Signal system NTSC / PAL Video signal horizontal resolution 480 lines (DVD) Video signal-to-noise ratio 50 dB (DVD)Audio signa
19、l-to-noise ratio 60 dB Total harmonic distortion 0.05% Dynamic range DVD : 80 dB ; CD: 80 dBFM Tuner System PLL quartz-locked digital synthesizer system Tuning range 87.50 108.00 MHz (50 kHz step) Antenna FM pigtail antenna Antenna terminals 75 ohms, unbalanced Intermediate frequency 10.7 MHzAM Tune
20、r System PLL quartz-locked digital synthesizer system Tuning range 5221620 kHz (9 kHz interval) Antenna AM Loop antennaVideo outputs CVBS Video 1 Vp-p 75 ohms S-video Y: 1 Vp-p 75 ohmsC: PAL 0.3 Vp-p 75 ohms / NTSC 0.286 Vp-p 75 ohms Scart out 1 Vp-p 75 ohms Optical & Coaxial out 1 Vp-p 75 ohmsAudio
21、 line outputs Audio L/R 1 Vrms, 1k ohms Subwoofer 1.2Vrms maximum (adjustable), 1k ohmsAudio power outputs Stereo mode 50 W + 50 W (8 ohms at 1 kHz, THD 10%) Surround mode Front: 50 W + 50 W (8 ohms at 1 kHz, THD 10%)Center: 50 W (8 ohms at 1 kHz, THD 10%)Rear: 50 W + 50 W (8 ohms at 1 kHz, THD 10%)
22、 Phones Headphones jack(stereo 3.54mm)General (main unit) Power requirements AC 220 - 240 V, 50 Hz Power consumption 250 W Dimensions W 435 x H 59 x D 345 mm Weight 4.8 kgActive SubwooferOutput power : 100 W (4 ohms at 55Hz, THD 10%)Speaker system : Bass reflexPower requirements : AC 220 - 240 V, 50
23、 HzPower consumption : 165 WSpeaker unit : 8 inchesRated impedance : 4 ohmsDimensions : W 200 x H 360 x D 345 mmWeight : 9.8 kgFront / Center / Rear speakersPower: 50 W maximumSpeaker system: Bass reflexSpeaker unit: 3 inches,cone type: paperRated impedance: 8 ohmsDimensions: W 90 x H 150 x D 110 mm
24、Weight: 0.64 kg (rear speaker)0.82 kg (front , center speaker)1-1 SPECIFICATIONS MAIN UNIT SPEAKERSGENERAL INFORMATION1E1 - 21-2 CONTROLLING VERSION OF FIRMWAREThe firmware is regularly modified as required to improve theperformance.Check to see whether the customer problem can be solved byupgrading
25、 the firmware : If it can, do so.1) Open the tray with power on.2) While holding down the ADJ/VOL (+) key on remote control, press the Zoom key.3) The version of firmware will appear at the top left of screen.(The display will disappear in approx. 5 seconds.) VER XXXX 1 ATUO EUR 2 0 Version No. Regi
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