Hisense MT5380 User Manual
LCDTelevision
Service Manual
Chassis: MT5380
Product Type: LHDN26W57US
Ver 1.0
Hisense Electric Co.,
August, 2009
Ltd.
(1) --ELCHW261
Contents
Contents ....................................................................................................................................................................... - 2 -
Service Manual ........................................................................................................................................................... - 3 -
1. Precautions and notices ..................................................................................................................................... - 3 -
1.1 Warning ................................................................................................................................................... - 4 -
1.2 Notes ....................................................................................................................................................... - 7 -
2. Product Function Specifications ....................................................................................................................... - 9 -
2.1 Product Function ..................................................................................................................................... - 9 -
2.2 Specifications ........................................................................................................................................ - 10 -
3. LCD Panel Spec .............................................................................................................................................. - 11 -
3.1 General Description .............................................................................................................................. - 11 -
3.2 General Features ................................................................................................................................... - 12 -
4. Chassis Layout and Overall Wiring Diagrams ............................................................................................... - 13 -
Boards and Chassis Layout ......................................................................................................................... - 13 -
5. Factory/Service OSD Menu and Adjustment .................................................................................................. - 14 -
5.1 To enter the Factory OSD Menu ........................................................................................................... - 14 -
5.2 Factory OSD Menu ............................................................................................................................... - 14 -
5.3 Designer Menu ...................................................................................................................................... - 15 -
5.4 To Exit the Aging Mode ........................................................................................................................ - 17 -
6. Software Upgrading ........................................................................................................................................ - 18 -
6.1 Get ready for upgrading ........................................................................................................................ - 18 -
6.2 Upgrading with the MtkTool ................................................................................................................ - 20 -
7. Troubleshooting .............................................................................................................................................. -24 -
7.1 Troubleshooting for Remote Control .................................................................................................... - 24 -
7.2 Troubleshooting for Function Key ........................................................................................................ - 25 -
7.3 TV won't Power On .............................................................................................................................. - 26 -
7.4 Troubleshooting for Audio .................................................................................................................... - 27 -
7.5 Troubleshooting for TV/VGA/HDMI input .......................................................................................... - 28 -
7.6 Troubleshooting for YPbPr input .......................................................................................................... -29 -
7.7 Troubleshooting for Video/S-Video input ............................................................................................. - 30 -
8. Explode View and Explode Born List ............................................................................................................. - 31 -
9. Schematic circuit diagram .............................................................................................................................. - 31 -
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1. Precautions and notices
Service Manual
BEFORE SERVICING THE LCD TV,
READ THE SAFETY PRECAUTIONS IN
THIS MANUAL•
USE ONLY MANUFACTURER SPECIFIED REPLACEMENT PARTS WHEN
SERVICING.
USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S
WARRANTY
Proper service and repair is important to the safe, reliable operation of all Hisense
Electric Co., Ltd Equipment. The service procedures recommended by Hisense and
described in this Service Guide are effective methods of performing service operations.
Some of these service operations require the use of tools specially designed for the
purpose. The special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES
which should be carefully read in order to minimize the risk of personal injury to service
personnel. The possibility exists that improper service methods may damage the
equipment and pose risk of personal injury
• It is also important to understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. Service should only be performed by an experienced electronics
-3-
techician trained in the proper Television safety and service methods and procedures
Hereafter throughout this manual, Hisense Electric Co., Ltd will be referred to as
Hisense.
1.1 Warning
1.1.1
Critical components having special safety characteristics are identified with a a_ by the
Ref. No. in the parts list. Use of non-manufacturer's recommended parts may create
shock, fire, or other hazards.Under no circumstances should the original design be
modified or altered without written permission from Hisense. Hisense assumes no
liability, express or implied, arising out of any unauthorized modification of design.
Servicetech assumes all liability.
DANGER CAUTION
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY
ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH
THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE GUIDE,
1.1.2.
All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce life drastically. When repairing, be sure to
use anti-static table mats and properly use a grounding wrist stra. Keep components and
tools also at this same potential.
-4-
IMPORTANT:
Always disconnect the power cord from AC outlet before replacing parts or modules.
1.1.3
To prevent electrical shock, use only a properly grounded 3 prong outlet or extension
cord.
1.1.4
When replacement parts are required, be sure to use replacement parts specified by the
manufacturer or have the same characteristics as the original part. Unauthorized
substitutions may result in fire, electric shock, or other hazards and will void the
manufacturer's warranty.
1.1.5
Safety regulations require that after a repair the set must be returned in its original
condition. In addition, prior to closing set, check that:
-Note:
>All wire harnesses and flex cables are properly routed and secured with factory tape
and/or mounted cable clamps.
> All cables and connectors are properly insulated and do not have any bare wires/lead
exposed.
-5-
1.1.6
(1) Do not supply a voltage higher than that specified to this product. This may
damage the product and may cause a fire.
(2) Do not use this product:
> High humidity areas
> In an area where any water could enter or splash into the unit.
High humidity and water could damage the product and cause fire.
(3) If a foreign substance (such as water, metal, or liquid) gets inside the panel
module, immediately turn off the power. Continuing to use the product may cause fire
or electric shock.
(4) If the product emits smoke, and abnormal smell, or makes an abnormal sound,
immediately turn off the power. Continuing to use the product, it may cause fire or
electric shock.
(5) Do not pull out or insert the power cable from/to an outlet with wet hands. It may
cause electric shock.
(6) Do not damage or modify the power cable. It may cause fire or electric shock.
(7) If the power cable is damaged, or if the connector is loose, do not use the product:
otherwise, this can lead to fire or electric shock.
(8) If the power connector or the connector of the power cable becomes dirty or dusty,
wipe it with a dry cloth. Otherwise, this can lead to fire.
(9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer,
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or sold with the apparatus. When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-over.
1.2 Notes
Notes on Safe Handling of the LCD panel and during service
The work procedures shown with the Note indication are important for ensuring the
safety of the product and the servicing work. Be sure to follow these instructions.
• Before starting the work, secure a sufficient working space.
• At all times other than when adjusting and checking the product, be sure to turn OFF
the POWER Button and disconnect the power cable from the power source of the TV
during servicing.
• To prevent electric shock and breakage of PC board, start the servicing work at least 30
seconds after the main power has been turned off. Especially when installing and
removing the power board, start servicing at least 2 minutes after the main power has
been turned off.
• While the main power is on, do not touch any parts or circuits other than the ones
specified. If any connection other than the one specified is made between the measuring
equipment and the high voltage power supply block, it can result in electric shock or
may trip the main circuit breaker When installing the LCD module in, and removing it
from the packing carton, be sure to have at least two persons perform the work.
• When the surface of the panel comes into contact with the cushioning materials, be
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sure to confirm that there is no foreign matter on top of the cushioning materials before
the surface of the panel comes into contact with the cushioning materials. Failure to
observe this precaution may result in, the surface of the panel being scratched by foreign
matter.
• Be sure to handle the circuit board by holding the large parts as the heat sink or
transformer. Failure to observe this precaution may result in the occurrence of an
abnormality in the soldered areas.
• Do not stack the circuit boards. Failure to observe this precaution may result in
problems resulting from scratches on the parts, the deformation of parts, and
short-circuits due to residual electric charge.
• Perform a safety check when servicing is completed. Verify that the peripherals of the
serviced points have not undergone any deterioration during servicing. Also verify that
the screws, parts and cables removed for servicing purposes have all been returned to
their proper locations in accordance with the original setup.
The lightning flash with arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
dangerous voltage within the products enclosure that may be of sufficient magnitude to
constitute a risk of electric shock.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the set.
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2. Product Function Specifications
2.1 Product Function
Front Cabinet
Input _l_tion
Volume Up
Volume Down
_Remote reviver
Channel Up
Channel Down
Power(On/Stand by)
-9-
Back Cabinet
AC INPUT
2.2 Specifications
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Appendix
Model
Diagonal display size
Television system
Audio multiplex
Channem coverage
PC mode
YPbPr/YCbCr mode
HDMI mode
Resolution
Power source
Power consumption
Audio power
RF input
Video input
Connection
Interface
Graphic iHput Analog RGB 15pin x 1
ELCHW261
26 Inches
American TV standard ATSC/NTSC system
BTSC system
VRF: 2_,13 UHF: 14_,59 CATV:lN125
Digital Terrestrial Broadcast (8VSB): 2_-_59
Digital cable (64/256 QAM): 1-,135
640 x 480/50Hz,800 x 500/50Hz, 1024 x 768/50Hz
4801/50Hz,480P/50Hz,720Pi50Hz, lO80Z/50Hz
4BOI/50Hz,480P/50HzJ20Pi50H% l O801/50Hz
1366 x 768
AC 120 V, 60 Hz
75W
5W+5W
Cable/Antenna xl
VideoX1
S-VideoX1
ComponentX2
HDMIX2
AVAudio X 1
Audio input ComponentAudio X 2
VGAAudio Input X 1
Audio X 1
Audio output
Dimensions Width: 8.2 inches
Environmenta_ conditions Temperature 5_C,_3d_C(41F_@5F}Humidity:20%_80%RH, Atmospheric pressure:86kPa.-106kPa
Supplied accessories Remote Control Guide, Warranty Registration card
Desgn and specifications an subject to change without notice.
CUSTONERNOTICE: Use carefu ly when operating to prevent damage to the screen.
Coaxial Audio out x 1
Headphone audio outx i
Length: 26.5inches
Height: 20.3 inches
23.1 Ibs
Remote control, AC cord, Batteries, User Hanua[, Warranty Card, QSG,
3. LCD Panel Spec
Panel: M260TWRl\ROH SN 1061384
3.1 General Description
The M260TWR1 is a color active matrix thin film transistor (TFT)liquid crystal display
(LCD) that uses amorphous silicon TFT as a switching device. It is composed of a TFT
LCD panel, a timing controller, voltage reference, common voltage, DC-DC converter,
column driver; and row driver circuit. This TFT LCD has a 26-inch diagonally measured
active display area with WXGA resolution (1366 vertical by 768 horizontal pixel array).
_-,26" WXGA TFT LCD Panel
'!,_''ill
[]4U CCFLs Backlight System
mSupported WXGA (V:1.,366lines, H:768 pixels)resolution
mCompatible with RollS Standard
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3.2 General Features
Product Summary
Screen Diagonal
Active Area
Pixels H x V
Pixel Pitch
Pixel Arrangement
Disp_a_ Mode
White Luminance
Contrast Ratio
Response Time
Logic Power Consumption
Boc ghtPowe,
i_:i:ii2iih, iii{i;{"
Outline DimensQB
Electrica_ Inte_ace (_ic)
Suppo_ Co_or .......
26
575J69 (H) x 323.712: (V)"
1,366. (x3) x 768
0.4215 (per one triiad)x:
RG,B. Medical Stripe ......
NormaililyWhite_ ii!!!i_I:!i!!ii:?
s00_ ....
36 typ]ca (Black pa_ern_ 60Hz)
typical (C,FL current 7mA)
3_900 tS@ica/
626 (W) x 373 (H) x 32 (T)*
8 bit LVDS
16.7 M
mm
cd,m_ (CCFL@7mA)
ms@c
v
wa_
watt
9
mm
80% typica[
_i_1 Viewing Direction
:Su_ace Treatment
...... *The gib_sities were not calculated in the thickness of the outline dimension.
6 o:'dock
Anti Glare + 3H
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4. Chassis Layout and Overall Wiring Diagrams
Boards and Chassis Layout
No Description Part No. Type/Model PCB/Model
(1) Main Board 121477 RSAG2.908.1553-2\ROH RSAG7.820.1730\VER.D\ROH
(2) Power Board 122630 RSAG2.908.1498-2\ROH RSAG7.820.1646\VER.C\ROH
(3) Keypad Board 113354 RSAG2.908.1088\ROH RSAG7.820.1101 \VER.B\ROH
(4) IR Board 116295 RSAG2.908.1260-2\ROH RSAG7.820.1337\VER.B\ROH
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5. Factory/Service OSD Menu and Adjustment
5.1 To enter the Factory OSD Menu
a. With factory RC (remote control)
1. Press "M" button and enter factory mode.
2. Press "Menu" button and enter factory OSD menu.
3. Press "CH+"/"CH-" button select the function menu, press "VOL+"/"VOL-" enter the selected
function menu. Press "VOL+"/"VOL-" button adjust values in the menu.
b. With user's RC
1. PowerTVOn
2. Press Menu button and call up User OSD Menu
3. Select Audio-> Balance
4. Enter 0->5->3 ->2 in sequence.
Note: If necessary, re-do number keys.
5. Factory OSD appears.
6. Press Menu again and leave factory OSD.
5.2 Factory OSD Menu
5.2.1 White Balance
Note: Different source has different WB values. Before adjusting, please change to desired source.
1. Auto Color
For VGA and Component Video sources, WB values must be adjusted.
Before adjusting, prepare the signal instruments such as DVD or K-8256 first, and find the video picture
with gray and color bars. Then please change to desired source.
source Timing Pattern Notes
1
2
Notes:
a, Press
b, Press
c, Select
d, Press
e, Close
ADC V{3A 1024"768 gray-3color For V{3A source
ADC HDTV 720P gray-3color For Component Video
"M" button and enter factory mode.
"Menu" button and enter factory OSD menu.
the item "Auto Color"
VOL+ button to auto color.
the OSD menu after 5 seconds.
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