Marantz LC3050 Manual de usuario
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
SECTION PAGE
PRODUCT SPEC. ....................................................................................................................... 1
SAFETY PRECAUTIONS ............................................................................................................ 2
SERVICING PRECAUTIONS ...................................................................................................... 3
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 ................................................................................................ 41
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 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 : 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.
040401ECM
SUPERSCOPE TECHNOLOGIES, INC.
USA
MARANTZ AMERICA, INC
1100 MAPLEWOOD DRIVE
ITASCA, IL. 60143
USA
PHONE : 630 - 741 - 0300
FAX : 630 - 741 - 0301
JAPAN
Technical
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 / TRADING
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 - 3677
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
TAIWAN
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 : +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
PHONE : +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, KWUN 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 - 9519 - 0900
FAX : +61 - (0)2 - 9519 - 0600
AUSTRALIA
SERVICE MANUAL PAGE:1
PRODUCT SPEC.
Model LC3050
Main body
Horizontal size 850 mm Thickness 244.6 mm
Height 540 mm Weight 14.6 kg
Power requirements DC 24V/6.0A
Television system
PAL-BG, I, DK/ SECAM-BG, DK, L
Television programme VHF: 2~13 UHF: 21~69 Cable: S1~S41
LCD Panel 30” wide TFT LCD panel
Power consumption MAX. 130W
External antenna impedance 75Ω
Audio output 10W + 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 100-240V, 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 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.
SERVICE MANUAL PAGE:2
SAFETY PRECAUTIONS
Leakage Current Hot Check (See below Figure)
Plug the 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 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 limits 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 parts 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 manufacturer.
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;
Removing 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 substitution 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 equipped.
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 Sensitive(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 adhesive
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 procedure 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 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 pattern. Solder the overlapped area and clip off any
excess jumper wire.
SERVICE MANUAL PAGE:4
DISASSEMBLY PROCEDURE
Disassemblyprocedure
1).Back cover
Remove 13 screws
Remove 4 screws
SERVICE MANUAL PAGE:5
DISASSEMBLY PROCEDURE
2).Metal plate & Rear chassis
Remove 4
Removal of rear metal chassis...
Removal of Terminal metal plate
1. Remove 2
2. Slide away the
metal plate
SERVICE MANUAL PAGE:6
DISASSEMBLY PROCEDURE
3).Main PWB & Connectors
Remove 4 Main
CB screws
Removal of Main P C...
Remove 4 Main
CB screws
Removal of Main P C...
Remove 7
Removal of MainPCB
Remove 7
Removal of MainPCB
SERVICE MANUAL PAGE:7
DISASSEMBLY PROCEDURE
4).LCD Panel chassis
Removal of LCD Module sub-bracket
Remove 8 screws, then take off sub-metal
Remove 8 screws, then take off two
vertical mountmetal brackets
Removal of LCD Module vertical brackets
SERVICE MANUAL PAGE:8
DISASSEMBLY PROCEDURE
5-1). LCD Moul
Removal of LCD Module brackets
Remove18 screw
Remove 4 brackets, then lift out LCD Module
(move all wire looms away which are attached to the module)
Removal of LCD Panel module mounting brackets
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