Marantz LC 3050 Service Manual

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Se IV I Ge LC3050 /m B
Man ual LCD TV

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TABLEOFCONTENTS

SECTION PAGE
PRODUCT SPEC. .
SAFETY PRECAUTIONS
SERVICING PRECAUTIONS ..

DISASSEMBLY PROCEDURE 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 .

Please use this service manual with referring to the user guide (D.F.U) without fail.
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LC3050

Part no. 90M47AW855010
First Issue 2004.05
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MARANTZ DESIGN 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 equipment 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 address

2. Complete part numbers and quantities required

3. Description of parts

4. Model numberfor 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.

7 USA - 7 EUROPE / TRADING - - CANADA
MARANTZ AMERICA, INc MARANTZ EUROPE a.v. MARANTZ CANADA INC.
1100 MAPLEWOOD DRIVE P. 0. BOX 3744, BUILDING SILVERPOINT 57505 APPLE CREEK BLVD.
ITASCA, IL. 60143 BEEMDSTRAAT 11, 5653 MA EINDHOVEN MARKHAM, ONTARIO L3R 531
USA THE NETHERLANDS CANADA
PHONE : 630 . 741 . 0300 PHONE : +31 . 40 . 2507344 PHONE : 905 . 415 . 9292
FAX : 630 . 741 7 0301 FAX : +31 . 40 . 2507860 FAX : 905 . 475 . 4159
- FHOFESSIDNAL AMERICAS - TPHDFESSIUNAL AUSTRALIA 7 T PHGFESSIMVAL HONG KONG 7
SUPERSCOPE TECHNOLOGIES, INC. TECHNICAL AUDIO GROUP PTv, LTD Jolly ProAudio Broadcast Engineering Lid.
MARANTZ PROFESSIONAL PRODUCTS 4353 Bridge Rd., UNIT 2, 10F, WAH HUNG CENTRE,
2640 WHITE OAK CIRCLE, SUITE A STANMORE NSW 2046 41 HUNG To ROAD, KWUN TONG, KLN.,
AURORA, ILLINOIS 60504 USA AUSTRALIA HONG KONG
PHONE : 630 . 320 . 4300 PHONE : +61 7 (0)2 7 9519 . 0900 PHONE : 952 . 21913660
FAX : 630 . 520 7 3103 FAX : +61 . (0)2 . 9519 . 0600 FAX : 352 . 21913990
- AUSTRALIA - 7 THAILAND - 7SINGAPORE
QualiFi Pty Lid, MR2 STANDARD CO., LTD wo KEE HONG DISTRIBUTION PTE LTD
24 LIONEL ROAD, 746 . 754 MAHACHAI ROAD_, No.1 JALAN KILANG TIMOR
MT. WAVERLEY VIC 3149 WANGBURAPAPIROM, PHRANAKORN, #08703 PACIFIC TECH CENTRE
AUSTRALIA BANGKOK, 10200 THAILAND SINGAPORE 159303
PHONE : +61 . (0)3 . 9543 . 1522 PHONE : +66 . 2 . 222 9131 PHONE : +65 6376 0333
FAX : +61 . (0)3 . 9543 . 3677 FAX : +66 . 2 . 224 6795 FAX : +65 6376 0166
- NEW ZEALAND - 7 TAIWAN - 7 MALAYSIA
WILDASH AUDIO SYSTEMS Nz PAI- VUING co., LTD. wo KEE HONG ELECTRONICS SDN. BHD.
14 MALVERN ROAD MT ALBERT 6 TH FL NO, 143 SUNG KIANG ROAD, 2ND FLOOR BANGUNAN INFINITE CENTRE
AUCKLAND NEw ZEALAND TAIPEI, 10429, TAIWAN R.O.C. LOT 1, JALAN 13/6, 46200 PETALING JAYA
PHONE :+64 . 9 . 3451953 PHONE : +866 . 2 . 25221304 SELANGOR DARUL EHSAN, MALAYSIA
FAX : +64 . 9 . 8463554 FAX :+886 . 2 . 25630415 PHONE : +60 . 3 . 7954 8088
FAX : +60 . 3 . 7954 7033
- JAPAN Technical 7 KOREA
MARANTZ JAPAN, INC. B 2S 1? 5 y \y H ifi g $1 MK ENTERPRISES LTD.
357 1+ 7* CHOME. SAGAMIONO ROOM 604/605, ELECTROPOFFICETEL, 16758,
SAGAMIHARA 7 SHI, KANAGAWA 3GA, HANGANGPRO, YONGSANPKU, SEOUL
JAPAN 22373505 a: 7: $228-8505 KOREA
PHONE : +31 42 74a 1013 133% I lfiffifilfimtfitEflW-asq pHONE : +822 . 3232 ,155
FAX : +31 42 741 9190 FAX : +322 . 3232 . 154

SHOCK, FIRE HAZARD SERVICE TEST :

CAUTION :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 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.

040401 ECM