DAEWOO
MODELO: DLA-32H1
Chassis： MT5380
Product Type: Televisión de 32” LCD
Ver 1.0
Hisense Electric Co.，Ltd.
Apr. 2008
Contents.......................................................................................................................................................................- 2 -
Service Manual ...........................................................................................................................................................- 3 -
1. Precautions and notices.....................................................................................................................................- 3 -
1.1 Warning...................................................................................................................................................- 4 -
1.2 Notes.......................................................................................................................................................- 7 -
2. Product Function Specifications .....................................................................................................................- 10 -
2.1 Product Function...................................................................................................................................- 10 -
2.2 Specifications........................................................................................................................................- 13 -
3. LCD Panel Spec..............................................................................................................................................- 14 -
3.1 General Description ..............................................................................................................................- 14 -
3.2 General Features ...................................................................................................................................- 15 -
4. Chassis Layout and Overall Wiring Diagrams ...............................................................................................- 16 -
4.1 Boards and Chassis Layout...................................................................................................................- 16 -
4.2 Connectors ............................................................................................................................................- 17 -
4.3 Wires and Cables Overall Wiring Diagram(s)......................................................................................- 18 -
5. Factory/Service OSD Menu and Adjustment.......................................................¡Error! Marcador no definido.
5.1 To enter the Factory OSD Menu ................................................................¡Error! Marcador no definido.
5.2 Factory OSD Menu....................................................................................¡Error! Marcador no definido.
Contents
5.3 Designer Menu(待小于数据) ....................................................................¡Error! Marcador no definido.
6. Software Upgrading........................................................................................................................................- 19 -
6.1 Get ready for upgrading........................................................................................................................- 23 -
6.2 Upgrading with the MtkTool .....................................................................¡Error! Marcador no definido.
7. Troubleshooting..............................................................................................................................................- 26 -
7.1 Troubleshooting for Remote Control....................................................................................................- 30 -
7.2 Troubleshooting for Function Key........................................................................................................- 31 -
7.3 TV won’t Power On..............................................................................................................................- 32 -
7.4 Troubleshooting for Audio....................................................................................................................- 33 -
7.5 Troubleshooting for TV/VGA/HDMI input..........................................................................................- 34 -
7.6 Troubleshooting for YPbPr input..........................................................................................................- 35 -
7.7 Troubleshooting for Video/S-Video input.............................................................................................- 36 -
8. Schematic circuit diagram ...................................................................................¡Error! Marcador no definido.
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Service Manual
1. Precautions and notices
BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN
THIS MANUAL.
WHEN REPLACEMENT PARTS ARE REQUIRED, BE SURE TO USE
REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER.
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. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. Hisense could not possibly know, evaluate and advise the service
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trade of all conceivable ways in which service might be done or of the possible
hazardous consequences of each way. Consequently, Hisense has not undertaken any
such broad evaluation. Accordingly, a serviceman that uses a service procedure or tools,
which are not recommended by Hisense, must first satisfy himself thoroughly that
neither his safety nor the safe of the equipment will be jeopardized by the service
method selected.
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
Ref. No. in the parts list. Use of substitute replacement parts, which do not have the
same specified safety characteristics, 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. Serviceman assumes all liability.
DANGERCAUTION 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.
by the
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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, make sure
that you are connected with the same potential as the mass of the set by a wristband with
resistance. Keep components and tools also at this same potential.
1. Never replace modules or other components while the unit is switched on.
2. When making settings, use plastic rather than metal tools. This will prevent any
short circuits and the danger of a circuit becoming unstable.
1.1.3
To prevent electrical shock, do not use this polarized ac plug with an extension cord,
receptacle, or the outlet unless the blades can be fully inserted to prevent blade exposure.
To prevent electrical shock, match wide blade or plug to wide slot, fully insert.
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.
1.1.5
Safety regulations require that after a repair the set must be returned in its original
condition. In particular attention should be paid to the following points.
-Note: The wire trees should be routed correctly and fixed with the mounted cable
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clamps.
-The insulation of the mains lead should be checked for external damage.
1.1.6
(1) Do not touch Signal and Power Connector while this product operates. Do not
touch EMI ground part and Heat Sink of Film Filter.
(2) Do not supply a voltage higher than that specified to this product. This may damage
the product and may cause a fire.
(3) Do not use this product in locations where the humidity is extremely high, where it
may be splashed with water, or where flammable materials surround it. Do not install
or use the product in a location that does no satisfy the specified environmental
conditions. This may damage the product and may cause a fire.
(4) 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.
(5) 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.
(6) Do not disconnect or connect the connector while power to the product is on. It
takes some time for the voltage to drop to a sufficiently low level after the power has
been turned off. Confirm that the voltage has dropped to a safe level before
disconnecting or connecting the connector.
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(7) Do not pull out or insert the power cable from/to an outlet with wet hands. It may
cause electric shock.
(8) Do not damage or modify the power cable. It may cause fire or electric shock.
(9) 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.
(10) 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.
(11) Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, 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
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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
activation of the leakage-detection 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
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.
• When handling the circuit board, be sure to remove static electricity from your body
before handling the circuit board.
• 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
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short-circuits due to residual electric charge.
• Routing of the wires and fixing them in position must be done in accordance with the
original routing and fixing configuration when servicing is completed. All the wires are
routed far away from the areas that become hot (such as the heat sink). These wires are
fixed in position with the wire clamps so that the wires do not move, thereby ensuring
that they are not damaged and their materials do not deteriorate over long periods of time.
Therefore, route the cables and fix the cables to the original position and states using the
wire clamps.
• 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
Back Cabinet
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2.2 Specifications
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NOTE: Specifications and design are subject to possible modifications without notice due
to improvements。
3. LCD Panel Spec
3.1 General Description
AX080D002F is a 31.5” TFT Liquid Crystal Display module with 16-EEFL
Backlight unit and a single LVDS interface.
This module supports 1366 x 768 WXGA format and can display 16.7M colors
(8-bits colors).
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3.2 General Features
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4. Chassis Layout and Overall Wiring Diagrams
4.1 Boards and Chassis Layout
TV(4)
TV(5)
TV(1)
TV(2)
TV(3)
No Description Part No Type/Model PCB/ Model
TV(1) Main BD
116468
RSAG2.908.1230-4
RSAG7.820.1276
TV(2) In/Out connector
board
TV(3) LED / IR Board
TV(4) Key Board
TV(5) Power Board
116434
114175
114174
114922
RSAG2.908.1291
RSAG2.908.1169
RSAG2.908.1168
RSAG2.908.916-27\ROH
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5RSAG7.820.1263
40RSAG7.820.1213
20RSAG7.820.1214
E/RSAG7.820.848A
4.2 Connectors
Main Board
J1411
J1410
J703
J101
J901
Location No. Specification Description
J901 Jack/FF-HX19-10\ROH LVDS signal between MB and panel
J101 Jack/TJC10-14A\ROH Power from Power BD
J1411 Jack/TJC10-3A\ROH Buttons (connect key BD and main BD)
J1410 Jack/TJC10-5A\ROH IR, LED
J703 Jack/TJC10-4A\ROH Serial Port connector
J902 Jack/TJC3-4A\ROH Video/Audio signal
J1201 Jack/A2006WSO-2×13P\ROH Headphone Audio Signal
J801 Jack/TJC3-4A\ROH Audio signal to speakers
J902
J1201
J801
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4.3 Wires and Cables Overall Wiring Diagram(s)
No DESCRIPTION SPECIPICATION NOTE
LVDS signal Connector/HX-0147\ROH Main BD J901<-->Panel
1
+5V, +12V supply to Main BD Connector /TJC10T-14Y-200\ROH Main BD J101<-->Power BD XP812
2
Main Power Connector /TJC2-3Y-300-2\ROH Power Inlet-->Power BD XP801
3
Buttons Connector /TJC10T-3Y-800\ROH Main BD J1411<--> Key BD XPK01
4
LED & IR Connector /TJC10T-5Y-500\ROH Main BD J1410<-->IR &LED BD XPR01
5
Audio out put (R/L) Connector /TJC3H-4Y-650-900\ROH Main BD J801<-->Speakers
6
Headphone Audio Connector /TJC3T-4Y-300\ROH Main BD J902<-->I/O CON BD XP02
7
Serial data Connector /TJC10T-4Y-350\ROH Main BD J703<-->I/O CON BD XP03
8
Video/Audio signal Connector /HX-2026C400\ROH Main BD J1201<-->I/O CON BD XP01
9
Backlight Power Connector /HX-3005B450\ROH Power BD XP810<--> Panel left backlight port
10-1
Backlight Power Connector /HX-3005B350\ROH Power BD XP809<--> Panel right backlight port
10-2
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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. Power TV On
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, please change to desired source and right timing and pattern.
source Timing Pattern Notes
1 ADC VGA 1024*768 gray-3color For VGA source
2 ADC HDTV 720P gray-3color For Component Video
a. Select the item “Auto Color”.
b. Press VOL+ button to auto color.
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c. Close the OSD menu after 5 seconds.
5.2.2 Factory Option
Item Default Options Notes
1 MODE M M, U
U-Can enter factory mode only
Note: MODE “M” is only used for factory production.
5.2.3 Version Info
Item Default Options Note
1
2
Note: Software version info of the TV, readable only.
5.2.4 Clear the EEPROM
Item Meaning Note
Version LHD32W19NUS_E002
Date r.1.02_0308
Software version
The date of current version
M-Can enter factory mode
with factory RC or user RC.
with user’s RC.
Clean data except
1 Clear partly
WB data and Auto Color data
2 Clear completely
Note: The factory menu date varies according to different sources. Incase changing the factory
data by error, you can choose to “clear the EEPROM”, by which you can resume the default
value.
To clear the EEPROM:
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Clean all data
a. Select the item “Clear All”.
b. Press VOL+ button to clear the EEPROM data.
c. Close the OSD menu after 5 seconds.
d. Restart the TV.
5.3 Designer Menu
5.3.1 Video Mode
Standard：
TV AV S-Video Component VGA HDMI
R Gain 128 128 128 128 132 130
G Gain 126 126 126 116 124 120
B Gain 134 134 134 124 124 125
Offset：
TV AV S-Video Component VGA HDMI
R Offset 116 116 116 117 113 115
G Offset 118 118 118 123 122 117
B Offset 120 120 120 125 125 120
Cool：
TV AV S-Video Component VGA HDMI
R Gain 118 118 118 121 123 124
G Gain 119 119 119 122 123 123
B Gain 135 135 135 135 135 143
Warm：
TV AV S-Video Component VGA HDMI
R Gain 150 150 150 150 150 150
G Gain 120 120 120 120 120 120
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B Gain 120 120 120 120 120 120
5.3.2 Video Curve:
TV AV S-Video Component VGA HDMI
Bright Max 570 570 550 600 650 600
Bright Min 20 0 0 0 0 0
Bright Mid 540 540 520 550 510 530
Contrast
Max
Contrast Min 0 0 0 0 0 0
Contrast Mid 450 450 450 450 450 450
Saturation
Max
Saturation
Min
Saturation
Mid
Hue Max 1000 1000 1000 1000 1000 1000
Hue Min 0 0 0 0 0 0
Hue Mid 471 471 471 471 471 471
5.3.3 Picture Mode
550 550 550 550 550 600
1000 1000 1000 1000 1000 1000
0 0 0 0 0 0
500 500 500 500 500 500
TV AV S-Video Component VGA HDMI
Vivid Bright 55 55 55 55 55 55
Vivid Contrast 55 55 55 55 55 55
Vivid
Saturation
Std Bright 50 50 50 50 50 50
Std Contrast 50 50 50 50 50 50
Std
Saturation
Movie Bright 45 45 45 45 45 45
Movie 45 45 45 45 45 45
55 55 55 55 55 55
50 50 50 50 50 50
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Contrast
Movie
Saturation
5.3.4 Volume Curve：
TV 0 23 32 47 64
AV 0 27 39 52 73
S-Video 0 27 38 55 88
HDMI/component/VGA 0 24 35 45 80
Note：Set Downmix to “Lt/Rt”.
45 45 45 45 45 45
Min 20 Mid 80 Max
6. Software Upgrading
The software is upgraded by a burning toll-MtkTool, which can burn the program file *.bin to the
main board of the unit.
6.1 Get ready for upgrading
6.1.1 Install the driver
Double click the icon
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, install the driver.
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Select the default value, the driver will be installed step by step.
6.1.2 Hardware connecting
Connect the unit to your pc with a USB-to-serial port cable. USB port connects to your pc, and
serial port to the TV’s RS232 port.
USB connector: to PC.
Serial connector: to TV’s RS232
port.
For the first connecting, the pc will recognize and automatically install the USB device. The
process is just like the installation of a mini disk, see the following picture.
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6.2 Upgrading with the MtkTool
MTKtool is a green program needing no installation. It is saved in the folder
. There are five folders/files in this folder altergether.
The MtkTool using log is restored in the MtkLog folder. It records the running time and date
whenever the tool is used. The log will be a txt file named by the date and time.
After connecting the TV with your PC, double click icon, open the
MtkTool.
If following error appears, it means the related port is not be set properly.
Ignore these errors, click “Confirm” and enter the MtkTool main interface, see the
following picture.
Flash chip model (for LHD32W19NUS, it will be MT538X).
Please refer to follow steps to update the software:
1—Select mode of Flash chip to MT538X as the below picture.
2—Refer to the next page instruction to select the communicate port.
3—Press the icon beside the baud rate and make sure it is green as the below picture.
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4—Set the flash baud rate to 115200 as the below picture.
5—Click the browse button to select the *.bin file that will be updated.
6—Click the “start” button to update software.
Select mode
of Flash chip
Communicate
port
Set Flash
Baud Rate
Select *.bin
file
Start upgrade
Information of upgrade
process
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Open “Device Manager” and find which port is connected with the TV. In above picture, COM2
is connected to the TV; so, select “COM2” in the MtkTool main interface. Select the right baud rate
according to chip model. For this unit( chip model is MT538X), select 115200.
Note: Where or not click the “Auto Set Flash Baud Rate” in the “window” menu depends
on the chip type. If the flash chip does not support high speed transport, do not select this option;
otherwise, reserve the selected mood.
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Click “Browse” button, find the upgrading program file, and select it. Press “Upgrade” button
and start upgrading.
The following interface appears on the screen, indicating upgrading successfully.
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7. Troubleshooting
7.1 Troubleshooting for Remote Control
Remote control does not work
Try new batteries
NO
Replace RC
Check IR receiver
YES
YES
Replace battery
Replace remote control
Change Led & IR board
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YES
Replace Led & IR BD
7.2 Troubleshooting for Function Key
Buttons does not work
Check switches
YES
Replace tact switch
NO
Check key board
NO
Check Key BD cable
Change Key BD
YES
YES
Replace Key BD
OK
NO
Replace main board
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7.3 TV won’t Power On
TV won’t power on
Is LED
light?
NO
Check Power
Inlet
YES
Make Sure Power
source is live
YES
NO
BLUE
RED
OSD?
NO
YES
Check signal
Source
YES
NO
Check Power
Cord
NO
Try Power on by
RC and Button
Neither
works
Replace Main
BD
YES
Only
one works
Both
Work
Replace
Power Cord
Check/replace IR
BD or Keypad
PCA
NO
Replace Panel
Replace Main BD
OK
YES
Power on
NO
Replace Power BD
YES
OK
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7.4 Troubleshooting for Audio
No sound
Check connecter
YES
Reconnect
NO
Check speaker wire
NO
Check speaker set
YES
YES
Replace speaker wire
Replace speaker set
NO
Replace main board
NO
YES
OK
Replace PSU
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7.5 Troubleshooting for TV/VGA/HDMI input
No picture on the screen
NO
Check Signal Source
Make sure signal
source is available
YES
Check connect
NO
YES
Check cable
NO
Replace main board
Reconnect
Replace cable
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7.6 Troubleshooting for YPbPr input
No picture on the screen
Check Source work or not
YES
Check connect
NO
Check Wires (Green Blue, Red)
NO
Replace main board
NO
YES
YES
Check Source Device
Reconnect
Replace wires
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7.7 Troubleshooting for Video/S-Video input
No picture on the screen
Check Source work or not
YES
Check connect
NO
Check Cable/ Wires
NO
Replace main board
NO
YES
YES
Check Signal Source
Reconnect
Replace Cable/Wires
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