Technics-SAHT340E-htss-sm 维修电路原理图.pdf

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1、lGeneralPower Source:E/ EG areas:AC 230V, 50HzEB area:AC 230V-240V, 50HzPower consumption:90 WDimensions (WHD):43060342 mmMass:3kglAmplifier sectionRMS Output Power: Dolby Digital ModelTotal RMS Dolby Digitalmode Power:330 WAt 1kHz and total harmonic of 10%lFront:55 W/ Channel (5)lCenter:55 W/ Chann

2、el (5)lSurround:55 W/ Channel (5)At 100Hz and total harmonic of 10%lActive subwoofers:55 W/ Channel (5)DIN Output Power: Dolby Digital Mode:lTotal DIN Dolby Digital mode Power:150 WAt 1kHz and total harmonic of 1%lFront:25 W/ Channel (5)lCenter:25 W/ Channel (5)lSurround:25 W/ Channel (5) 2006 Panas

3、onic AVC Networks Singapore Pte.Ltd. All rights reserved. Unauthorized copying anddistribution is a violation of law.SA-HT340ESA-HT340EBSA-HT340EGColour(S).Silver TypeAt 100Hz and total harmonic of 1%lSubwoofer:25 W/ Channel (5)lFM tuner section (FM)Preset Memory:FM 15 stationsAM/MW 15 stationsFrequ

4、ency Range:87.5-108.00MHz(50kHz step)Sensitivity:1.8V (IHF)S/N 26dB1.4VAntenna Terminals:75 (unbalanced)lAM tuner section (AM/MW)Frequency Range:522-1629kHz (9kHz step)AM Sensitivity S/N 20dB at999kHz:560V/mlDisc sectionDiscs played (8 cm or 12 cm):(1) DVD DVD-Video, DivX(*6,7)(2) DVD-RAM DVD-VR, MP

5、3(*2,7), JPEG(*4,7), MPEG4(*5,7),DivX(*6,7)(3) DVD-R DVD-Video, DVD-VR, MP3(*2,7), JPEG(*4,7),MPEG4(*5,7), DivX(*6,7)(4) DVD-R DL DVD-Video, DVD-VR(5) DVD-RW DVD-Video, DVD-VR, MP3(*2,7), JPEG(*4,7),MPEG4(*5,7), DivX(*6,7)(6) +R/RW VideoDVD Home Theater Sound SystemSpecificationsORDER NO.MD0605168C2

6、RadioFans.CN 收音机爱 好者资料库(7) +R DL Video(8) CD, CD-R/RW CD-DA, Video CD, SVCD(*1), MP3(*2,7),WMA(*3,7), JPEG(*4,7), MPEG4(*5,7), DivX (*6,7), HighMATLevel 2 (Audio and Image)*1Conforming to IEC62107*2MPEG-1 Layer 3, MPEG-2 Layer 3*3Windows Media Audio Ver.9.0 L3lNot compatible with Multiple Bit Rate (

7、MBR)*4Exif Ver 2.1 JPEG Baseline fileslPicture resolution: between 160 x 120 and 6144 x 4096pixels (Sub sampling is 4:0:0, 4:2:0, 4:2:2, 4:4:4). Extremelylong and narrow pictures may not be displayed.*5MPEG4 data recorded with Panasonic SD multi cameras orDVD video recorders.lConforming to SD VIDEO

8、specifications (ASF standard)/MPEG4 (Simple Profile) video system/G.726 audio system.*6Plays all versions of DivX video (including DivX6) withstandard playback of DivX media files. Certified to the DivXHome Theater Profile.lGMC (Global Motion Compensation) is not supported.*7The total combined maxim

9、um number of recognizable audio,picture and video contents and groups: 4000 audio, pictureand video contents and 400 groups.Pick up:Wavelength:lCD:785nmlDVD:662nmLaser power:lCD:CLASS 1MlDVD:CLASS 1Audio output (DISC):Number of channels:5.1 ch (FL, FR, C, SL, SR,SW)Audio performance:Frequency respon

10、se:DVD (linear audio):4 Hz-22 kHz (48 kHz sampling)4 Hz-44 kHz (96 kHz sampling)CD-Audio:4 Hz-20 kHzS/N ratio:CD-Audio:105 dBDynamic range:DVD (linear audio):95 dBCD-Audio:95 dBTotal harmonic distortion:CD-Audio:0.005 %lVideo sectionVideo system:Signal system:PAL 625/50, PAL 525/60,NTSCComposite vid

11、eo output:Output level:1 Vp-p (75 )Terminal:Scart jack (1 system)S-video output:Y output level:1 Vp-p (75 )C output level:PAL; 0.3Vp-p (75)NTSC; 0.286 Vp-p (75 )TerminalScart jack (1 system)RGB video output:R output level:0.7 Vp-p (75 )G output level:0.7 Vp-p (75 )B output level:0.7 Vp-p (75 )Termin

12、al:Scart jack (1 system)Power consumption in standby mode:approx 1WNote:1.Specifications are subject to change without notice.Mass and dimensions are approximate.2.Total harmonic distortion is measured by the digital spectrumanalyzer.Solder:This model uses lead free solder (PbF).Mechanism:This model

13、 uses DL2SU (Single tray) mechanism.Power Supply:This model uses Switching Mode Power Supply (SMPS)Module for power-up unit.Refer to original service manual for *1, *2, *3, *4.2SA-HT340E / SA-HT340EB / SA-HT340EGRadioFans.CN 收音机爱 好者资料库3SA-HT340E / SA-HT340EB / SA-HT340EG 1 Safety Precautions 5 1.1.

14、GENERAL GUIDELINES 5 1.2. Before Repair and Adjustment (Using SMPS) 5 1.3. Protection Circuitry 5 1.4. Caution for AC Cord 6 2 Prevention of Electro Static Discharge (ESD) toElectrostatically Sensitive (ES) Devices 7 3 Precaution of Laser Diode 8 4 About Lead Free Solder (PbF) 9 4.1. Service caution

15、 based on legal restrictions 9 5 Handling Precautions for Traverse Unit 10 5.1. Cautions to Be Taken in Handling the Optical Pickup Unit 10 5.2. Grounding for electrostatic breakdown prevention 10 6 Accessories 12 7 Operation Procedures 13 7.1. Remote Control Keys Operation 13 7.2. Main Unit Keys Op

16、eration 14 7.3. Connection Setup 15 7.4. Disc information 16 7.5. About DivX VOD Content 18 8 Self-Diagnosis and special mode setting 19 8.1. Service Mode Summary Table 19 8.2. Service Mode Table 1 19 8.3. DVD Self Diagnostic Function-Error Code 24 8.4. Sales Demonstration Lock Function 26 8.5. Serv

17、ice Precautions 27 9 Assembling and Disassembling 28 9.1. Disassembly Flow Chart 29 9.2. Main Components and P.C.B. Locations 29 9.3. Disassembly of Top Cabinet 30 9.4. Disassembly of the DVD Lid (When taking out discmanually) 30 9.5. Disassembly of Front Panel Assembly 31 9.6. Disassembly of FL P.C

18、.B. & Volume P.C.B. 31 9.7. Disassembly of DVD Mechanism Unit 32 9.8. Disassembly of DVD Module P.C.B. 32 9.9. Disassembly of Rear panel 33 9.10. Disassembly of SMPS Module P.C.B. 33 9.11. Disassembly of Main P.C.B. & Tuner Extent P.C.B. 33 9.12. Disassembly of Digital Amp IC 33 10 Service Position

19、34 10.1. Servicing position of the DVD Module P.C.B. 34 10.2. Servicing position of the Main P.C.B. 34 10.3. Servicing position of the SMPS Module P.C.B. 34 11 Assembly and disassembly of Mechanism Unit 35 11.1. Disassembly Procedure 35 12 Measurements and Adjustments 41 12.1. Service Tools and Equi

20、pment 41 12.2. Important points in adjustment 41 12.3. Storing and handling of test discs 41 12.4. Optical adjustment 42 13 Abbreviations 43 14 Voltage and Waveform Chart 45 14.1. DVD Module P.C.B. 45 14.2. Main P.C.B. 46 14.3. FL P.C.B. & Tray Loading P.C.B. 47 14.4. SMPS Module P.C.B. 47 14.5. Wav

21、eform Chart 48 15 Illustration of ICs, Transistors and Diodes 49 16 Wiring Connection Diagram 51 17 Block Diagram 53 18 Schematic Notes 59 19 Schematic Diagram 61 19.1. (A) DVD Module (DV3.2) Circuit 61 19.2. (B) Main/FL/Volume/Tray Loading/Tuner Extent Circuit 65 20 Printed Circuit Board 71 20.1. (

22、A) DVD Module P.C.B. 71 20.2. (B) Main/Power P.C.B. 72 20.3. (C) FL, Volume, Tuner Extent, & Tray Loading P.C.B. 73 21 Basic Troubleshooting Guide 75 21.1. Basic Troubleshooting Guide for Traverse Unit (DVDModule P.C.B.) 75 21.2. Troubleshooting Guide for Power section (Power circuit) 75 22 Overall

23、Block (HT340) 76 22.1. HT340 DVD Unit Block 77 22.2. HT340 Block (Analog Signal : DVD 5.1ch Play BackMode) 78 22.3. HT340 Block (Analog Signal : 2ch Analog Input Mode) 79 22.4. HT340 Power Supply Block 80 22.5. HT340 Power (Main) Block 81 23 Terminal Function of ICs 82 23.1. IC2018 (C2CBYY000194): S

24、ystem ControlMicroprocessor IC 82 24 Exploded Views 83 24.1. Cabinet Parts Location 83 24.2. Packaging 85 25 Replacement Parts List 86 25.1. Component Parts List 87CONTENTS Page Page4SA-HT340E / SA-HT340EB / SA-HT340EG1 Safety Precautions1.1. GENERAL GUIDELINES 1. When servicing, observe the origina

25、l lead dress. If a short circuit is found, replace all parts which have been overheated ordamaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properlyinstalled. 3. After servicing, carry out the follow

26、ing leakage current checks to prevent the customer from being exposed to shock hazards.1.1.1. LEAKAGE CURRENT COLD CHECK 1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed met

27、allic cabinet part onthe equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to thechassis, the reading should be between 1M and 5.2M.When the exposed metal does not have a return path to the chassis, the reading must be.Figure 11.1.2. LEAK

28、AGE CURRENT HOT CHECK (See Figure 1.) 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5k, 10 watts resistor, in parallel with a 0.15F capacitors, between each exposed metallic part on the set and agood earth ground such as a water p

29、ipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the voltage at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6.

30、The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) maybe used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limitsspecified, there is a possibility of a shock hazard,

31、and the equipment should be repaired and rechecked before it is returned tothe customer.1.2. Before Repair and Adjustment (Using SMPS)This model uses Switching Mode Power Supply (SMPS) Module to provide the neccessary voltages for the unit.DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for

32、 instance), as this may destroy solid state devices.After repairs are completed, restore power gradually using a variac, to avoid overcurrent.Current consumption at AC 230 V, 50 Hz in NO SIGNAL mode volume minimal should be 650 mA. (For E/EG)Current consumption at AC 230V240V, 50 Hz in NO SIGNAL mod

33、e volume minimal should be 650 mA. (For EB)1.3. Protection CircuitryThe protection circuitry may have operated if either of the following conditions are noticed: No sound is heard when the power is turned on. Sound stops during a performance.The function of this circuitry is to prevent circuitry dam

34、age if, for example, the positive and negative speaker connection wires are“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.5SA-HT340E / SA-HT340EB / SA-HT340EGIf this occurs, follow the procedure outlines below: 1. Turn off the pow

35、er. 2. Determine the cause of the problem and correct it. 3. Turn on the power once again after one minute.Note:When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.1.4. Caution for AC Cord6SA-HT340E / SA-HT340EB / SA-HT340EG2 Prev

36、ention of Electro Static Discharge (ESD) toElectrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits

37、 and some field-effect transistors andsemiconductor chip components. The following techniques should be used to help reduce the incidence of component damagecaused by electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain

38、off any ESD on yourbody by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES

39、devices, place the assembly on a conductive surface such asaluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not

40、 classified as anti-static (ESD protected) cangenerate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immedia

41、tely before you are ready to install it. (Mostreplacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparableconductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the

42、protective materialto the chassis or circuit assembly into which the device will be installed.CautionBe sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion

43、 such as thebrushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)sufficient to damage an ES device).7SA-HT340E / SA-HT340EB / SA-HT340EG3 Precaution of Laser Diode8SA-HT340E / SA-HT340EB / SA-HT340EG4 About Lead Free Solder (

44、PbF)4.1. Service caution based on legal restrictions4.1.1. General description about Lead Free Solder (PbF)The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for thisequipment in considering the globally environmental conservati

45、on.The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86F) more than thatof the normal solder.Definition o

46、f PCB Lead Free Solder being usedThe letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.(See right figure)Service caution for repair work using Lead Free Solder (PbF) The lead free solder has to be used when repairing the equipment for which the lead

47、 free solder is used.(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.) To put lead free solder, it should be well molten and mixed with the original lead free solder. Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC. Since the mel

48、ting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to meltthe lead free solder. Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 35030degrees C (66286F).Recommended Lead Free Solder (

49、Service Parts Route.) The following 3 types of lead free solder are available through the service parts route.RFKZ03D01K-(0.3mm 100g Reel)RFKZ06D01K-(0.6mm 100g Reel)RFKZ10D01K-(1.0mm 100g Reel)Note* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to

50、 0.3%9SA-HT340E / SA-HT340EB / SA-HT340EG5 Handling Precautions for Traverse UnitThe laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must betaken avoid caution to electrostatic breakdown when servicing and handling the laser diod