Jvc-DRMH-50-Service-Manual 电路图 维修手册.pdf

《Jvc-DRMH-50-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Jvc-DRMH-50-Service-Manual 电路图 维修手册.pdf（64页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.YD060 2005/3 DVD&HDD VIDEO RECORDER YD06020053 DR-MH50SE, DR-MH50SEF DR-MH50SEK TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . 1-12 Since the whole mechanism assembly unit is replaced, the DVD recorder mechanism of this unit need not be adjusted. DR-MH50SE, DR-MH50SEF, DR-MH50SEK D4HR30 HDDDVD CABLE/SAT DVDTV DVD PR NEXTPREVIOUS PAUSEREC REC MODEDISPLAYON SCREEN SLOWSLOWPLAY/SELECT STOP/ CLEA

5、R NAVIGATIONTOP MENU RETURN ENTER MENU TV/CBL/SAT STANDBY ON OPEN/ CLOSETV AV VIDEO TV AUXCANCELMEMO/MARK PROGRAMMEEDITDUBBINGLIVE JUMP HELP TV SATSET UPVPS/PDC AUDIOSUBTITLEANGLE LIVE CHECK PROGRESSIVE SCAN STANDBY/ON S-VIDEOVIDEOL(MONO)-AUDIO-R DVDV IN F1 HDDDVD PULL - OPEN VIDEO Area Suffix E - C

6、ontinental Europe EF - France EK - U.K. Only ver.EKOnly ver.E,EF R RadioFans.CN 收音机爱 好者资料库 1-2 (No.YD060) SPECIFICATION E.& O.E. Design and specifications subject to change without notice. Manufactured under licence from Dolby Laboratories. “Dolby” and double-D symbol are trademarks of Dolby Laborat

7、ories. “DTS “ and “DTS DIGITAL OUT “ are trademarks of Digital Theater Systems, Inc. VIDEO Plus+ and PlusCode are registered trademarks of Gemstar Development Corporation. The VIDEO Plus+ system is manufactured under license from Gemstar Development Corporation. This product incorporates copyright p

8、rotection technology that is protected by method claims of certain U.S. patents and other intellectual property rights owned by Mac- rovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision Corporation, and is intended for home and o

9、ther limited viewing users only unless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited. DR-MH50SEDR-MH50SEFDR-MH50SEK GENERAL Power requirement AC 220 V - 240 V, 50 Hz/60 Hz Power consumption Power on : 37 W Power off : 15.6 W Temperature Operating :

10、 5C to 35C Storage : -20C to 60C Operating position Horizontal only Dimensions (W H D) 435 mm 70 mm 345.5 mm Weight 6.1 kg Input/Output Video input Y:0.5-2.0 Vp-p, 75 ohms(pin jack) Audio input -8 dB, 50 kilohms (pin jack) Corresponding to mono (left) Audio output -8 dB, 1 kilohms (pin jack) 21-pin

11、SCART connectors IN/OUT x 1, IN/DECODER x 1 S-video input Y: 0.8 - 1.2 Vp-p, 75 ohms C: 0.2 - 0.4 Vp-p, 75 ohms S-video output Y: 1.0 Vp-p, 75 ohms C: 0.3 Vp-p, 75 ohms i.Link 4-pin for DV input Component video output Y: 1.0 Vp-p, 75 ohms CB/CR, PB/PR: 0.7 Vp-p, 75 ohms Corresponding to copy protect

12、ion SAT Control 3.5 mm Digital audio output Optical: -18 dBm, 660 nm Coaxial: 0.7 Vp-p, 75 ohms Corresponding to Dolby Digital and DTS Digital Surround Bit stream Selectable in digital audio output setting menu VIDEO/AUDIO (DVD Deck) Recording time Maximum 8 hours (with 4.7 GB disc) (XP) : Approx. 1

13、 hour, (SP) : Approx. 2 hours, (LP) : Approx. 4 hours, (EP) : Approx. 6 hours, (FR) : Approx. 1 hour - 8 hours Audio recording system Dolby Digital (2 ch) Linear PCM (XP mode only) Video recording compression system MPEG2 (CBR/VBR) VIDEO/AUDIO (HDD Deck) Video recording compression system MPEG2 (VBR

14、) Audio recording system Dolby Digital (2 ch) Linear PCM (XP mode only) Recording time Maximum 473 hours(with 250 GB HDD) (XP): Approx.53 hours, (SP): Approx.109 hours,(LP): Approx.218 hours, (EP): Approx.328 hours, (FR): Approx. 473 hours TUNER/TIMER Signal system PAL-type colour signal and CCIR mo

15、nochrome signal, 625 lines/50 fields TV channel storage capacity 99 positions (+AUX position) Tuning system Frequency synthesized tuner Channel coverage (SECAM L) FrequenceVHF-LOW: 49 MHz -65 MHz/ HIGH: 104 MHz -300 MHz - Hyper300MHz-470MHz UHF470 MHz -862 MHz CanauxVHF-LOW: 2-4 HIGH: 5-10 CATV - Hy

16、perCATV UHF21-69 Channel coverage (PAL B/G) FrequenceVHF 47 MHz -89 MHz/ 104 MHz -300 MHz/ 302 MHz -470 MHz LOW: 47 MHz -89 MHz/ HIGH: 104 MHz -300 MHz 44.5MHz-143MHz/ 143MHz-470MHz Hyper-302 MHz -470 MHz- UHF470 MHz -862 MHz CanauxVHF-LOW: E2-E4, X, Y, Z HIGH: E5-E12,S1-S20,M1-M10,U1-U10 - HyperS21

17、-S41 UHFE21-E69 Memory backup time Approx. 60 seconds ACCESSORIES Provided accessories RF cable,21-pin SCART cable,Satellite Controller,Infrared remote control unit,”AA” battery x 2 ATTENTION: This unit contains microcomputers. External electronic noise or interference could cause malfunctioning. In

18、 such cases, switch the unit off and unplug the mains power cord. Then plug it in again and turn the unit on. Take out the disc. After checking the disc, operate the unit as usual. RadioFans.CN 收音机爱 好者资料库 (No.YD060)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contai

19、ns special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services shou

20、ld be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of

21、responsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be

22、 obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having such features are identified by shading on the schematics and by

23、( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. (4) The leads in the products are routed and

24、 dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be

25、 confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal cabinet, screw heads, headphone jack, control sha

26、fts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabin

27、et, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 per volt or more sensitivi

28、ty in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any

29、exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2Warning (1) This equipment h

30、as been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance with the relevant safety standards. (4) It is essential that safety critical compo

31、nents are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4Critica

32、l parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be s

33、ure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机爱

34、 好者资料库 1-4 (No.YD060) 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace

35、the complete Laser Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety

36、 switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. ! Please use enough caution not to see the beam directly or touch

37、 it in case of an adjustment or operation check. REPRODUCTION AND POSITION OF LABEL On mechaism assembly (No.YD060)1-5 1.6Hard Disk Drive (HDD) Handling Precautions The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at a high speed. If it i

38、s not handled carefully, either abnormal operation may result or it may not be possible to read data. The HDD is sensitive to the following items and special care is required in safeguarding against them when handling an HDD. Also take care in handling a set incorporating an HDD. (1) Vibrations and

39、impacts (2) Static electricity (3) Rough handling 1.6.1Handling in transport, etc. Be sure to place the HDD in the manufacturers specified pack- age carton before transport. When receiving a package containing an HDD, check that the package carton is not damaged (such as having holes in the carton,

40、crushed corners, etc.). Do not impact the packaging carton when loading or unloading it. It is not permitted to use the inner package carton only for transporting an HDD. Do not stack package cartons one upon another. 1.6.2Handling an HDD in the stand-alone status When handling an HDD on a hard work

41、bench, place an anti- static mat (rubber sheet) or similar object on the hard surface (to prevent any impacts occurring between the HDD and bench). Do not stack the HDDs one upon another. Do not knock an HDD with a hard object (such as a screwdriv- er). Do not place an HDD on its side panel without

42、using a support (do not place an HDD in an unstable position). 1.6.3Handling the installation of an HDD Place antistatic mats or similar sheets on all of the surfaces on which work is conducted or when the HDD is transported. Do not permit the HDD to knock against the sets brackets. When screwing th

43、e brackets, be careful not to knock the HDD. When using a power screwdriver, use a low-shock model and arrange the tightening torque properly. When mounting an HDD in a main body, take care not to apply excessive force to the brackets. HDD Do not throw or drop packages. Be sure to package and transp

44、ort the HDDs correctly. 1-6 (No.YD060) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.YD060)1-7 SECTION 3 DISASSEMBLY The photograph used by this explanation might be different from the actual one according to the destination etc. 3.1

45、Main body section 3.1.1Remove the top cover (See figure 1) (1) Remove the four screws A attaching the top cover on both sides of the main body. (2) Remove the five screws B attaching the top cover on the back of the main body. (3) Raise the both sides and lower part of the rear of the top cover, wit

46、h opening them slightly in an outward direction. And the top cover will be removed. Fig.1 B B A x 2 TOP COVERTOP COVERTOP COVER B A x 2 B B 1-8 (No.YD060) 3.1.2Remove the front panel assembly and HDD (See figure 2, figure 3, figure 4, and figure 5) Prior to performing the following procedure, remove

47、 the top cover. There is no need to remove the drive unit. (1) Remove the four screws C attaching the HDD. (2) Disconnect the socket wire from connector CN5307 on the switching regulator board. (3) Disconnect the card wire from connector on the HDD. (4) Disconnect the card wires from connector CN300

48、1, CN3002, CN4001 on the main board. (5) Hooks a and b are removed respectively, and the front panel assembly is removed. NOTE: In case of attach a front panel assembly, please let a card wire pass in the hole in the front part of a chassis, respectively, and connect. Fig.2 Fig.3 Fig.4 Fig.5 HDDConn

49、ectorCN5307Switching regulator board C C C C Front panel assembly Main boardCN3001 CN3002CN4001 Hook a Hook bHook b Hook a Front panel assembly Front panel assembly Card wire Card wire Front part of a chassis (No.YD060)1-9 3.1.3Remove the drive unit (See figure 6) Prior to performing the following procedure, remove the top cover. There is no need to remove the front panel assembly. (1) Disconnect the socket wire from connector CN5303 on the switching regulator board. (2) Disconnect the card wir