Service Manual ....................................................................................................................................................- 3 -
1. Precautions and notices..............................................................................................................................- 3 -
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.
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LCD TV Service Manual
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.
1.1 WARNING
1.1.1
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.
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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
LCD TV Service Manual
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
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cable 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
LCD TV Service Manual
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
LCD TV Service Manual
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
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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
LCD TV Service Manual
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
short-circuits due to residual electric charge.
• Routing of the wires and fixing them in position must be done in accordance with
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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
LCD TV Service Manual
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
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2.2 Specifications
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LCD TV Service Manual
3. LCD Panel Spec
3.1 General Description
V260B1- L02 is a 25.5” TFT Liquid Crystal Display module with 8-CCFL
Backlight unit and RSDS interface.
This module supports 1366 x 768 WXGA format and can display 16.2M colors
(6-bits+FRC colors).
3.2 General Features
Item Specification Unit
Active Area
Bezel Opening Area 580.8 (H) x 328.8 (V) mm
Driver Element a-si TFT active matrix
Pixel Number 1366 x R.G.B. x 768 pixel
Pixel Pitch (Sub Pixel) 0.1405 (H) x 0.4215 (V) mm
Pixel Arrangement RGB vertical stripe Display Colors 16.2M color
Display Operation
Mode
Surface Treatment Anti-Glare coating (Haze 25%) Hard coating (3H) -
575.769 (H) x 323.712
(V)
Transmissive mode / Normally White -
(26” diagonal) mm
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(2)
(6)
(4)
(3)
LCD TV Service Manual
4. Chassis Layout and Overall Wiring Diagrams
4.1 Chassis Layout
(1)
(5)
No DescriptionPart No
(1)
(2)
(3)
(4)
(5)
(6)
Main Board 117379 RSAG2.908.1395-1\ROH RSAG7.820.1529\VERCROH
Power Board 115429 RSAG2.908.1251\ROH RSAG7.820.1235\VER.C\ROH
RUSB Board
TCON Board
Keypad PCA
IR&Led Board 116295
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.
4. Press “M” button exit factory mode in the factory OSD menu.
When TV outgoing factory,user can not enter factory OSD menu with Factory Remote
b. With user’s RC
1. Power TV On
2. Press Menu button and call up User OSD Menu
3. Select Sound-> Balance
4. When Balance value is “0”,Enter 0->5->3 ->2 in sequence.
Note: If necessary, re-do number keys.
5. Factory OSD appears.
6. Press the standby button then AC turn off and restart the TV, which can exit factory OSD
menu.
5.2 Factory OSD Menu
The Factory OSD Menu comprises Factory Menu and Design Menu .
5.2.1、Factory Menu
Factory Menu
White Balance
Auto Test
Auto Calibration
LOGO
OSD Language
Country
Option
Factory Init
Test Pattern
Version:
White Balance
R DRV 8
G DRV 10
B DRV 10
R CUT 136
G CUT 130
B CUT 121
BRIGHT_H 80
CONTRAST _H 80
BRIGHT_L 40
CONTRAST_L 40
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LCD TV Service Manual
Auto Calibration
Auto Color
Color Temp. Standard
RED COLOR 136
GREEN COLOR 130
BLUE COLOR 121
Option
SOURCE TV
BRIGHT 0 10
BRIGHT 50 100
BRIGHT 100 150
CONTRAST 0 60
CONTRAST 50 100
CONTRAST 100 150
TOFAC M
HDMI Cable Standard
DQS PHASE 3
LOGO
NULL
HISENSE
WELCOME
EGYPT OFF
Factory Init
QingDao
HuangDao
Guiyang
shunde
Hungary
France
Australia
CLEAR PROTECTLY
CLEAR UNPROTECTLY
Turkey
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LCD TV Service Manual
Test Pattern
BLUE
5.2.2、Design Menu
Design Menu
Picture Mode
Sound Mode
Sound Settings
Power Save
PIP Option
EMI
MOVESHARPNESS
LipSync
The software is upgraded by a burning tool- ISP_TOOL4.0.9, 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 ISP_TOOL4.0.9-------only for the first time update.
1、 Port Setting:
Choose “system”option from the “control panel”
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Click the “system” icon as the following
Choose the “hardware” option from the dialog window
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Click“device management” icon as the following
Choose the port (COM and LPT1)
LCD TV Service Manual
Choose the ECP print port (LPT1)
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Click the port of print (LPT1)as the following
LCD TV Service Manual
Choose “port setting”option as the following
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Find the folder where the ISP_TOOL4.0.9 lies in.
2、
There are three folders/files in this folder together.
DLPORTIO.dll and FTD2XX.DLL must be in the same folder
LCD TV Service Manual
Double click the ISP_TOOL4.0.9 icon, and then a dialog window will show as below.
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Click the Config button. And then a dialog window will show as below.
Port Type setting is LPT1
Base Addr setting is 0x378
Draw on the front of “pin 1 switch UART/I2c”
Speed setting is 99
As following
LCD TV Service Manual
Choose“SDA in”and setting “PIN” is “PIN10”。
Notes:
Do not draw on the front of “Reverse High”。
As following
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Choose “SCL in”and setting “PIN” is “PIN11”。
Notes:
Do not draw
As following
Choose “SDA out”and setting “PIN” is “PIN4”
Notes:
Draw on the front of “Reverse High”。
As following。
on the front of “Reverse High”。
LCD TV Service Manual
Choose “SCL out”and setting “PIN” is “PIN2”
Notes:
Draw
As following
on the front of “Reverse High”
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After having finished all above, clicking the “Apply ”button to complete the configuration。
LCD TV Service Manual
6.1.2 Hardware connecting
You can update the software through a special tool (as following)
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Connect the Debug board to the TV use VGA interface, the other parallel port to the
computer, just as the following。
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LCD TV Service Manual
6.2 Upgrading with the ISP_TOOL4.0.9
6.2.1 Double click the ISP_TOOL4.0.9 icon and a dialog window will show as following。
Click the“Read ”button。
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Choose the update file from the folder。
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The update file has been chosen successfully。
Click the“Auto”button and choose parameters as following。
Click the“Run”button
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Click the“connect”button,then show a dialog box as following。
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If show above then click the“Run”button again and again,till show the following dialog
window。
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LCD TV Service Manual
The above appears on the screen-the word “program ok”shows in the information
displaying window,indicating upgrading is ov er。
6.2.2 After the update is over. Must Confirm the software Version in the Version Menu.
If the update is successful, enter Factory Init Menu and select “Clear Unprotectly”
a. Press VOL+ button to clear the EEPROM data.
b. When the “Clear Unprotectly ” button becomes white, turn off the power.
c. Restart the TV.
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LCD TV Service Manual
7. Troubleshooting
7.1 Troubleshooting for Remote Control
Remote control does not work
YES
Try new batteries
Replace battery
NO
Replace RC
YES
Replace remote control
NO
Check IR receiver
Change Led & IR board
NO
Change Led & IR cable
YES
Replace Led & IR BD
YES
Replace Led & IR cable
NO
Replace main board
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LCD TV Service Manual
7.2 Troubleshooting for Function Key
Buttons does not work
Check switches
YES
Replace tact switch
NO
Check key board
YES
Replace Key BD
NO
Check Key BD cable
Change Key BD cable
YES
OK
NO
Replace main board
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7.3 TV won’t Power On
LCD TV Service Manual
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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LCD TV Service Manual
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
YES
OK
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LCD TV Service Manual
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
Reconnect
NO
Check cable
YES
Replace cable
NO
Replace main board
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LCD TV Service Manual
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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LCD TV Service Manual
7.7 Troubleshooting for Video/S-Video/ SCARTinput
No picture on the screen
Check Source work or not
YES
NO
Check Signal Source
YES
Check connect
Reconnect
NO
Check Cable/ Wires
YES
Replace Cable/Wires
NO
Check SCART BD
YES
Replace SCART BD
NO
Replace main board
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8. Explode View
9. Schematic circuit diagram
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BBK LT2619SU PARTS LIST
No. Part No.Description Qty.Code Number Remark
118625Front Cover 1 RSAG8.074.552\Z4\ROH
1
1052188Bracket 1 RSAG8.078.481\B2\Z3\ROH
2
1044829Button Bracket 1 RSAG8.335.067\Z0\ROH
3
117301Keypad PCA 1 RSAG2.908.1088-1\ROH
4
1046628Speaker 2 YDT4211E-5W8R-F\ROH
5
1036391Block 1 RSAG8.634.047\black\ROH
6
1050066Bracket 2 RSAG8.038.1303\ROH
7
118870LCD Panel 1 V260B1-L02\HS\BL\ROH
8
115429Power Board 1 RSAG2.908.1251\ROH
9
1050067Bracket 1 RSAG8.038.1304\ROH
10
1046924Power Cord 1 YS-1\ROH
11
1049574Stand 1 RSAG6.121.053\ROH
12
1050055Rear Cover 1 RSAG8.074.541\Z0\ROH
13
1052003Side Label 1 RSAG8.804.3280\ROH
14
1053175Bottom Label 1 RSAG8.804.3317 \ROH
15
1055349Rating Label 1 RSAG8.807.3922
16
1048779Bracket Unit 2 RSAG6.150.452\ROH
17
117379Main Board 1 RSAG2.908.1395-1\ROH
18
1053183Terminal Bracket 1 RSAG8.081.447\Z0\ROH
19
1050068Bracket Unit 1 RSAG4.114.052\ROH
20
Please
order
them
together
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BBK LT2621SU PARTS LIST
No. Part No.Description Qty.Code Number Remark
118626 Front Cover 1 RSAG8.074.556\Z3\ROH
1
1052188Bracket 1 RSAG8.078.481\B2\Z3\ROH
2
1044829Button Bracket 1 RSAG8.335.067\Z0\ROH
3
117301 Keypad PCA 1 RSAG2.908.1088-1\ROH
4
1046628Speaker 2 YDT4211E-5W8R-F\ROH
5
1036391Block 1 RSAG8.634.047\black\ROH
6
1050066Bracket 2 RSAG8.038.1303\ROH
7
118870 LCD Panel 1 V260B1-L02\HS\BL\ROH
8
115429 Power Board 1 RSAG2.908.1251\ROH
9
1050067Bracket 1 RSAG8.038.1304\ROH
10
1046924Power Cord 1 YS-1\ROH
11
1049574Stand 1 RSAG6.121.053\ROH
12
1050055Rear Cover 1 RSAG8.074.541\Z0\ROH
13
1052003Side Label 1 RSAG8.804.3280\ROH
14
1053175Bottom Label 1 RSAG8.804.3317 \ROH
15
1055349Rating Label 1 RSAG8.807.3922
16
1048779Bracket Unit 2 RSAG6.150.452\ROH
17
18
19
20
117379 Main Board 1 RSAG2.908.1395-1\ROH
1053183Terminal Bracket 1 RSAG8.081.447\Z0\ROH
1050068Bracket Unit 1 RSAG4.114.052\ROH