LG-LHRH7505SA-hdd-sm 电路图 维修手册.pdf

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1、HDD/DVD Recorder Receiver System SERVICE MANUAL MODELS : LH-RH7500SA/LH-RH7700S/LH-RH7505SA LHS-75SA5S/LHS-75SA5C/LHS-75SA5A CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETYPRECAUTIONS” IN THIS MANUAL. MODELS : LH-RH7500SA/LH-RH7700S/LH-RH7505SA/LHS-75SA5S/LHS-75SA5C/LHS-75SA5ASERVICE MANUAL P/NO

2、 : 3829RGP020NOCTOBER, 2005 RadioFans.CN 收音机爱 好者资料库 1-1 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS. 1-2 SERVICING PRECAUTIONS. 1-3 THE STEPS FOR CHANGE THE OPTION CODE. 1-4 SPECIFICATIONS. 1-5 RadioFans.CN 收音机爱 好者资料库 1-2 IMPORTANT SAFETY NOTICE This manual was

3、prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics Corporation. All components should be replaced only with types identical to those in

4、 the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs. Special components are also used to prevent x-radiation, shock and fire haz- ard. These components are indicated by the letter “x” included in their compo- nent design

5、ators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Electronics Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into the set i

6、s not delayed until the new service literature is printed. CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturers approval. Unauthorized modi- fications will not only void the warranty, but may lead to property damage or user injury. S

7、ervice work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines. GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. The lig

8、htning flash with arrowhead symbol within an equilateral tri- angle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magni- tude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating withi

9、n an equi- lateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE. SERVICE INFORMATION While servicing, use an isol

10、ation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the fol- lowing: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items

11、trans-ported to and from the repair shop. 2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been

12、 defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign par- ticles. 4. Check for physical evidence of damage or deterioration to parts and compo- nents, for frayed leads or damaged insulation

13、(including the AC cord), and replace if necessary. 5. No lead or component should touch a high current device or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided. 6. After reassembly of the set, always perform an AC leakage test on all exposed metalli

14、c parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS- FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the fo

15、llowing manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metal- lic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor.

16、 Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit consti- tutes a potential shock hazard and must be corrected i

17、mmediately. TIPS ON PROPER INSTALLATION 1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow. 2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, n

18、ear steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation. 4. Wall- and shelf-mounted installations using a commercial mounting kit

19、 must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leak

20、age tests on customized installations. 5. Caution customers against mounting a product on a sloping shelf or in a tilt- ed position, unless the receiver is properly secured. 6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying

21、to roll a cart with small cast- ers across thresholds or deep pile carpets. 7. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous conse- quences to home and family. A.C. Voltmeter 1500 OHM 10 WATT Place this pr

22、obe on each exposed metal part. Good Earth Ground such as the Water Pipe, Conduit, etc. 0.15uF PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS RadioFans.CN 收音机爱 好者资料库 1-3 SERVICING PRECAUTIONS CAUTION: Before servicing the DVD Recorder Combi Receiver covered by this service data and its suppl

23、ements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety pre- cautions in this publications, always follow the safety pre- cautions. Remember Safety First: General Servicing Precaut

24、ions 1. Always unplug the DVD Recorder Combi Receiver AC power cord from the AC power source before: (1)Removing or reinstalling any component, circuit board, module, or any other assembly. (2)Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3)Connecting a

25、test substitute in parallel with an elec- trolytic capacitor. Caution: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this DVD Recorder Combi Receiver or any of its assemblies. 3. Unless

26、specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4

27、. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this DVD Recorder Combi Receiver and / or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 6.

28、Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulatio

29、n resistance meter (500V) to the blades of the attachment plug. The insulation resis- tance between each blade of the attachment plug and acces- sible conductive parts (Note 1) should be more than 1M- ohm. Note 1: Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc.

30、 Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and s

31、emiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor compo- nent or semiconductor-equipped assembly, drain off any electrostatic charge on your body by tou

32、ching a known earth ground. Alternatively, obtain and wear a commer- cially available discharging wrist strap device, 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 devices, place the assem

33、bly on a conductive surface such as aluminum 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 classified as “anti-st

34、atic” can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate an electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec- tive package until immediately before you are ready to in

35、stall it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil,or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the ch

36、assis or circuit assembly into which the device will be installed. Caution: Be 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. (Normally harmless motion such as the brushing toge

37、ther of your clothes fabric or the lifting of your foot from a carpeted floor can generate static elec- tricity sufficient to damage an ES device.) 1-4 THE STEPS FOR CHANGE THE OPTION CODE Push Switch POWER ON/ OFF at remocon or timer keyborad Select DVD MODE at the set use remocon or timer keyborad

38、 Push REC+ PLAY at timer keyboard Use remocon and push ENTER Use Direction Key at remocon (LEFT/ RIGHT) for select the position of option Use Direction Key at remocon (UP/ DOWN) for change the option After finish edit code of option push ENTER at remocon For finishing and intialized the option code

39、push REC+ EJECT at remocon NAMEHEXBINARY OPT10000000000 OPT20000000000 OPT30000000000 OPT40000000000 OPT50000000000 OPT60000000000 OPT70000000000 OPT80000000000 OPT90000000000 OPT100000000000 Press “Enter” key to Save and Exit DETECT NEW EEPROM (OPTION EDIT SCREEN) 1-5 SPECIFICATIONS GENERAL Power r

40、equirements AC 200-240V, 50/60 Hz Power consumption 45W Dimensions (approx.) 430 X 49 X 350 mm (w x h x d) without foot Mass (approx.) 4.6 kg Operating temperature 5C to 35C Operating humidity 5 % to 90 % Recording format PAL RECORDING Recording format DVD Video Recording, DVD-VIDEO Recordable media

41、 HDD (160GB), DVD-ReWritable, DVD-Recordable, DVD+ReWritable, DVD+Recordable, DVD+Recordable (Double Layer) Recordable time DVD (4.7GB): Approx. 1 hour (HQ mode), 2 hours (SQ mode), 4 hours (LQ mode), 6 hours (EQ mode) DVD+R DL (8.5GB): Approx. 3 hour (HQ mode), 3 hours 40 minutes (SQ mode), 7 hours

42、 10 minutes (LQ mode), 10 hours 30 minutes (EQ mode) HDD (160GB): Approx. 42 hours (HQ mode), 82 hours (SQ mode), 152 hours (LQ mode), 226 hours (EQ mode) VIDEO RECORDING FORMAT Sampling frequency 27MHz Compression format MPEG 2 (VBR support) AUDIO RECORDING FORMAT Sampling frequency 48kHz Compressi

43、on format Dolby Digital PLAYBACK Frequency response DVD (PCM 48 kHz): 8 Hz to 20 kHz, CD: 8 Hz to 20 kHz DVD (PCM 96 kHz): 8 Hz to 44 kHz Signal-to-noise ratio More than 100 dB (AUDIO OUT connector) Harmonic distortion Less than 0.008% (AUDIO OUT connector) Dynamic range More than 95 dB (AUDIO OUT c

44、onnector) INPUTS AERIAL IN Aerial input, 75 ohms VIDEO IN 1.0 Vp-p 75 ohms, sync negative, RCA jack x 2 / SCART x 2 AUDIO IN 0 dBm more than 47 kohms, RCA jack (L, R) x 2 / SCART x 2 DV IN 4 pin (IEEE 1394 standard) OUTPUTS VIDEO OUT1 Vp-p 75 , sync negative, RCA jack x 1 / SCART x 2 COMPONENT VIDEO

45、 OUT(Y) 1.0 V (p-p), 75 , negative sync, RCA jack x 1 (Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2 HDMI video/audio output 19 pin (HDMI standard, Type A) Audio output (digital audio) 0.5 V (p-p), 75 , RCA jack x 1 Audio output (optical audio) 3 V (p-p), 75 , Optical connector x 1 Audio output (analog au

46、dio) 2.0 Vrms (1 KHz, 0 dB), 600 , RCA jack (L, R) x 1 / SCART x 2 AMPLIFIER(LH-RH7000 SERIES) Stereo mode 100W + 100W (6 at 1 kHz, THD 10 %) Surround mode Front: 100W + 100W (THD 10 %) Center*: 100W Surround*: 100W + 100W (6 at 1 kHz, THD 10 %) Subwoofer*: 200W (3 at 30 Hz, THD 10 %) AMPLIFIER(LH-R

47、H9000 SERIES) Stereo mode 180W + 180W (4 at 1 kHz, THD 10 %) Surround mode Front: 180W + 180W (THD 10 %) Center*: 180W Surround*: 180W + 180W (4 at 1 kHz, THD 10 %) Subwoofer*: 300W (3 at 30 Hz, THD 10 %) (* Depending on the sound mode settings and the source, there may be no sound output.) (* Depen

48、ding on the sound mode settings and the source, there may be no sound output.) 1-6 TUNER SPECIFICATIONS Tuning Range (FM) 87.5 - 108 MHz Intermediate Frequency (FM) 10.7 MHz Signal-to-noise ratio 60 dB (Mono) Tuning Range (AM) 522 - 1,620 kHz Intermediate Frequency (AM) 450 kHz Antenna Wire antenna

49、(FM) Loop antenna (AM) SPEAKERS(LHS-75PA5) FRONT SATELLITE CENTER ACTIVE SUBWOOFER (LHS-75PA5F)(LHS-75PA5S)(LHS-75PA5C)(LHS-75PA5A) Power consumption: -70W Type: 1 Way 2 Speaker1 Way 1 Speaker1 Way 2 Speaker1 Way 1 Speaker Impedance: 6 3 6 3 Frequency Response: 100 - 20,000 Hz100 - 20,000 Hz80 - 20,000 H