Marantz-LC-3050-Service-Manual 电路图 维修手册.pdf

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1、LCD TV LC3050 Part no. 90M47AW855010 First Issue 2004.05 ecm Service Manual LC3050 /N1B Please use this service manual with referring to the user guide (D.F.U) without fail. LC3050 TABLE OF CONTENTS SECTIONPAGE PRODUCT SPEC. . 1 SAFETY PRECAUTIONS . 2 SERVICING PRECAUTIONS . 3 DISASSEMBLY PROCEDURE

2、. 4 PARTS LIST. 10 MECHANICAL EXPLODED VIEW.11 TROUBLE SHOOTING. 12 WIRE DRESSING. 17 ADJUSTMENT INSTRUCTION WITH DEFAULT FACTORY DATA. 19 PCB LAYOUT . 22 SCHEMATIC DIAGRAM . 27 BLOCK DIAGRAM . 28 CONNECTION DIAGRAM . 29 WAVE FORM . 30 FACTORY SPARE PARTS LIST . 41 RadioFans.CN 收音机爱 好者资料库 MARANTZ DE

3、SIGN AND SERVICE Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound. Only original MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which it is famous. Parts for your MARANTZ equipmen

4、t are generally available to our National Marantz Subsidiary or Agent. ORDERING PARTS : Parts can be ordered either by mail or by Fax. In both cases, the correct part number has to be specified. The following information must be supplied to eliminate delays in processing your order : 1. Complete add

5、ress 2. Complete part numbers and quantities required 3. Description of parts 4. Model number for which part is required 5. Way of shipment 6. Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void. SHOCK, FIRE HAZARD SERVICE TEST : CAUTION :

6、 After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC cord connector pins ( with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and controls and chassis bottom. Any resistance measurement

7、 less than 1 Megohms should cause unit to be repaired or corrected before AC power is applied, and verified before it is return to the user/customer. Ref. UL Standard No. 1492. In case of difficulties, do not hesitate to contact the Technical Department at above mentioned address. 040401ECM SUPERSCO

8、PE TECHNOLOGIES, INC. USA MARANTZ AMERICA, INC 1100 MAPLEWOOD DRIVE ITASCA, IL. 60143 USA PHONE : 630 - 741 - 0300 FAX : 630 - 741 - 0301 JAPANTechnical MARANTZ JAPAN, INC. 35- 1, 7- CHOME, SAGAMIONO SAGAMIHARA - SHI, KANAGAWA JAPAN 228-8505 PHONE : +81 42 748 1013 FAX : +81 42 741 9190 EUROPE / TRA

9、DING MARANTZ EUROPE B.V. P. O. BOX 8744, BUILDING SILVERPOINT BEEMDSTRAAT 11, 5653 MA EINDHOVEN THE NETHERLANDS PHONE : +31 - 40 - 2507844 FAX : +31 - 40 - 2507860 AUSTRALIA QualiFi Pty Ltd, 24 LIONEL ROAD, MT. WAVERLEY VIC 3149 AUSTRALIA PHONE : +61 - (0)3 - 9543 - 1522 FAX : +61 - (0)3 - 9543 - 36

10、77 NEW ZEALAND WILDASH AUDIO SYSTEMS NZ 14 MALVERN ROAD MT ALBERT AUCKLAND NEW ZEALAND PHONE : +64 - 9 - 8451958 FAX : +64 - 9 - 8463554 THAILAND MRZ STANDARD CO., LTD 746 - 754 MAHACHAI ROAD., WANGBURAPAPIROM, PHRANAKORN, BANGKOK, 10200 THAILAND PHONE : +66 - 2 - 222 9181 FAX : +66 - 2 - 224 6795 T

11、AIWAN PAI- YUING CO., LTD. 6 TH FL NO, 148 SUNG KIANG ROAD, TAIPEI, 10429, TAIWAN R.O.C. PHONE : +886 - 2 - 25221304 FAX : +886 - 2 - 25630415 MALAYSIA WO KEE HONG ELECTRONICS SDN. BHD. 2ND FLOOR BANGUNAN INFINITE CENTRE LOT 1, JALAN 13/6, 46200 PETALING JAYA SELANGOR DARUL EHSAN, MALAYSIA PHONE : +

12、60 - 3 - 7954 8088 FAX : +60 - 3 - 7954 7088 AMERICAS MARANTZ PROFESSIONAL PRODUCTS 2640 WHITE OAK CIRCLE, SUITE A AURORA, ILLINOIS 60504 USA PHONE : 630 - 820 - 4800 FAX : 630 - 820 - 8103 KOREA MK ENTERPRISES LTD. ROOM 604/605, ELECTRO-OFFICETEL, 16-58, 3GA, HANGANG-RO, YONGSAN-KU, SEOUL KOREA PHO

13、NE : +822 - 3232 - 155 FAX : +822 - 3232 - 154 SINGAPORE WO KEE HONG DISTRIBUTION PTE LTD No.1 JALAN KILANG TIMOR #08-03 PACIFIC TECH CENTRE SINGAPORE 159303 PHONE : +65 6376 0338 FAX : +65 6376 0166 HONG KONG Jolly ProAudio Broadcast Engineering Ltd. UNIT 2, 10F, WAH HUNG CENTRE, 41 HUNG TO ROAD, K

14、WUN TONG, KLN., HONG KONG PHONE : 852 - 21913660 FAX : 852 - 21913990 CANADA MARANTZ CANADA INC. 5-505 APPLE CREEK BLVD. MARKHAM, ONTARIO L3R 5B1 CANADA PHONE : 905 - 415 - 9292 FAX : 905 - 475 - 4159 TECHNICAL AUDIO GROUP PTY, LTD 43-53 Bridge Rd., STANMORE NSW 2048 AUSTRALIA PHONE : +61 - (0)2 - 9

15、519 - 0900 FAX : +61 - (0)2 - 9519 - 0600 AUSTRALIA RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL PAGE:1 PRODUCT SPEC. ModelLC3050 Main body Horizontal size 850 mmThickness 244.6 mm Height540 mmWeight 14.6 kg Power requirementsDC 24V/6.0A Television systemPAL-BG, I, DK/ SECAM-BG, DK, L Television programme

16、VHF: 213 UHF: 2169 Cable: S1S41 LCD Panel30” wide TFT LCD panel Power consumptionMAX. 130W External antenna impedance75 Audio output10W + 10W DVI-IN 1 *1 S-VIDEO IN 1 External IN/OUT ports HEADPHONE JACK 1 PC IN 1 PC AUDIO IN 1 SCART 2 POWER IN 1 ANTENNA IN 1 SUB WOOFER OUT 1 AC Power Adaptor AC 100

17、-240V, 5.0A, 50/60Hz, OUTPUT : 24VDC., 6.0A *1 Compatible with HDCP. Supported Signals 640 x 480P 60Hz 1280 x 720P 50/60Hz 1920 x 1080I 50/60Hz 720 x 480P 60Hz 720 x 576P 50Hz Note: In some cases a signal on the LCD TV may not be displayed properly. The problem may be an inconsistency with standards

18、 from the source equipment (DVD, Set-top box, etc.). If you do experience such a problem please contact Marantz Service Center, Inc. and also the manufacturer of the source equipment. RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL PAGE:2 SAFETY PRECAUTIONS Leakage Current Hot Check (See below Figure) Plug t

19、he AC cord directly into the AC outlet. Do not use a line Isolation Transformer during this check. Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor

20、 using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug of the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is, corresponds to 0.5mA. In case any measurement is out of the lim

21、its specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer. Leakage Current Hot Check circuit ! Import ant Safety Notice ! Many electrical and mechanical parts in this chassis have special safety-related characteristics. These p

22、arts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manu

23、facturer. SERVICE MANUAL PAGE:3 SERVICING PRECAUTIONS CAUTION! Before servicing receivers covered by this service manual, read and follow the SAFETY PRECAUTIONS on page 2 of this publication. General Servicing Precautions 1.Always unplug the receiver AC power cord from AC power source before; Removi

24、ng or reinstalling any component, circuit board module or any other receiver assembly. Disconnecting or reconnecting any receiver electrical plug or other electrical connection. Connecting a test substitute in p a. b. c.arallel with an electrolytic capacitor in the receiver. CAUTION! A wrong part su

25、bstitution or incorrect polarity installation of electrolytic capacitors may result in an explosion harzard. 2.Do not spray chemicals on or near this receiver or any of its assemblies. 3.Do not defect any plug/socket voltage interlocks with which receivers covered by this service manual might be equ

26、ipped. 4.Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. 5.Do not connect the test fixture ground strap to power supply heatsink in this receiver Electrost atically Sensit

27、ive(ES) Devices Some semiconductor(solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive(ES) Device.Examples Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the ad

28、hesive that bonds the foil to the circuit board causing the foil th separate from or “lift-off” the board. The following guidelines and procedures should be flollowed whenever this condition is encountered. At IC Connections To repair a defective copper pattern at IC connections use the following pr

29、ocedure to install a jumper wire on the copper pattern side of the circuit board.(Use this technique only on IC connections.) 1.Carefully remove the damaged copper pattern with a sharp knife.(Remove only as much copper as absolutely necessary.) 2.Carefully scratch away the solder resist and acrylic

30、coating(if used) from the end of the remaining coopper pattern. 3.Bend a small “U” in one end of a small guage jumper wire and carefully crimp it around the IC pin. 4.Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper

31、pattern. Solder the overlapped area and clip off any excess jumper wire. SERVICE MANUAL PAGE:4 DISASSEMBLY PROCEDURE Disassembly procedure 1).Back cover Remove 13 screws Remove 4 screws SERVICE MANUAL PAGE:5 DISASSEMBLY PROCEDURE 2).Metal plate L208 210 Oof IC201Video Data out OK? NO NO Check Extern

32、al Video Soure Replace IC201 SERVICE MANUAL PAGE:14 TROUBLE SHOOTING Check IC601 Audio Inputs Pin#47.48=PC L.R 50.51=Compo L.R 56.57=A/V L.R 60=RF Mono OK? Check IC601 Outputs Pin #27.28=L.R Out 30=Woofer Out OK? YES Check IC651.652 Audio outputs Each pin #7.#11 OK? Check external Input audio source

33、 Check IC601 VCC and Replacement YES NO Check IC605 Pin #10 Vcc & Pin #8 Mute (Pin #8 Low=Mute) and Replacement YES Check Speaker and Replacement NO NO SERVICE MANUAL PAGE:15 TROUBLE SHOOTING Check IC601 Pin#21 (CVBS Sibnal) OK? Check Pin #57 60 of IC 101 (R,G,B FB) YES Check Pin #67,70,72 73 of IC2

34、01 (R,G,B FB) Check CVBS Signal from Pin #67 of IC201 to Pin #21 of IC101 Replace IC01 YES NO Check RF Source gain NO NO SERVICE MANUAL PAGE:16 TROUBLE SHOOTING Check IC271,272,821 In/Out Voltage Check AL201206& AL208210 IC201 Video Data out OK? YES Check AL301306 IC301 Video Data out OK? DC Reg In/

35、Out Power Line Check & Replacement IC201 Each and all video Input Check Pin #78,80,82= Component 96=RF CVBS 98=A/V 100,102=Y/C YES NO Replacement IC101 YES Check IC1151 Pin #1,2,1215 (Sync) & VCC NO Replace IC1151 Check VCC Line & Replacement NO NO IC301 Each and all Input Signals Check Pin #54,65,7

36、0 = RGB input 32,33,35,36,38,39, 41,42 = DVI Input YES SERVICE MANUAL PAGE:17 WIRE DRESSING Wire Dressing Note : Using Acetate Tape No1, No3, No4, No5. Using Copper Tape No2, No6 (Conducted tape) 1 2 3 4 5 6 SERVICE MANUAL PAGE:18 WIRE DRESSING 1) Wire Dressing for Left speaker & woofer speaker. ( N

37、o.1) 2) Wire Dressing for Right speaker & Woofer speaker. ( No.2 ) 3) Wire Dressing for Key control & Power Indicator with IR receiver ( No.3 ) 3 1 2 SERVICE MANUAL PAGE:19 ADJUSTMENT INSTRUCTION WITH DEFAULT FACTORY DATA 1.SVC mode data Adjustment NOTE! When the EEPROM has been replaced, the SVC da

38、ta should be restored as the function of individual system and specification. Enter and exit SVC mode Note: into the SVC mode, Initialize with default data. 1) Press 5 Seconds MENU buttons on both TV set and Remote Controller at the same time to get into SVC mode. 2) Press the Yellow button several

39、times to find SVC Data. 3) Input the corresponding SVC data referring to Table below with the Volume Up/down key. 4) Press the OK button to memorize the data. 5) Press TV/AV button to exit SVC mode 2-1. Factory outgoing setting & Initialize with default data (into the SVC mode). PAGE ITEM Factory ou

40、tgoing setting Initialize with default data Ex REMARK AGC 15 15 Variable Data(0-31) RD 127 127 PC Contrast Coefficient-RED(0-255) GD 127 127 PC Contrast Coefficient-GREEN(0-255) BD 127 127 PC Contrast Coefficient-BLUE(0-255) RO 79 79 PC Brightness Coefficient-RED(0-63) GO 79 79 PC Brightness Coeffic

41、ient-GREEN(0-63) BO 79 79 PC Brightness Coefficient-BLUE(0-63) PC CP 5 5 PC Charge Pump(0-7) DATA 1 50 PR * * means current program NO. FP 52 52 FM Prescaler(0-127) NP 122 122 NICAM Prescaler(0-127) SP 63 63 SCART Prescaler(0-127) S1 VOL 44 44 SCART1 Volume(0-127) S2 VOL 44 44 SCART2 Volume(0-127) D

42、ATA 2 50 PR * * means current program NO. 0 100PR 200PR 0 0 1 200PR 0 Not apply to TEXT TEXT 1 1 1 Apply to TEXT 0 TELETEXT TOP OFF TOP 1 1 1 TELETEXT TOP ON 0 Apply to COMPONENT SCART 1 1 1 Apply to SCART 0 Not apply to ACMS ACMS 1 1 1 Apply to ACMS 0 Used except for CHINESS or AUSTRALIA CH+AU 0 0

43、1 Used CHINESS or AUSTRALIA 0 BG/I/DK 1 BG/I/DK/L 2 BG/I/DK/M SYS 1 1 3 RESERVED 50 PR * * means current program NO. DATA 3 106 Opt 1 Translate HEX into DEC(DATA3VALUE1) SERVICE MANUAL PAGE:20 ADJUSTMENT INSTRUCTION WITH DEFAULT FACTORY DATA 2-2.SVC Data Table PAGE ITEM Factory outgoing setting Initialize with default data Ex REMARK 0 Not apply to DUAL option DUAL 0 0 1 Apply to DUAL option 0 Not apply to MONO option MONO 0 0 1 Apply to MONO option 0 Not apply