Service Manual ...........................................................................................................................................................- 3 -
1. Precautions and notices.....................................................................................................................................- 3 -
2.2 Main Board:..........................................................................................................................................- 11 -
4.1 Upgrading with the ISP_TOOL............................................................................................................- 17 -
4.2 Upgrading with the USB ......................................................................................................................- 21 -
5.1 Power assign and block diagram ..........................................................................................................- 22 -
5.2 Image and signal process......................................................................................................................- 24 -
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
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,
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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
by the
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.
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, make sure
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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
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
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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.
(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:
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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
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
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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
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
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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 Specifications:
2.1 Specifications:
32 Inch & 42 Inch:
NOTE:
The above Specifications are reference only, other models refer to the actual User manual.
Please.
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r
2.2 Main Board:
Board 1: ( Panel have not 120HZ refurbish ratio)
Main IC
(MSD309PX)
HDMI
AV2
Y PB PR L R
VGA
L
V
D
Headphone
HDMI
S-Vi deo
AV1
Cable
Ai
USB
AV OUT
Coaxial
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PC Audio IN
Page 12
Board 2: (Panel have 120HZ refurbish ratio)
LVDS Board
(120HZ)
Note
units to determine the boards.
:
The above “Main board images”are reference only, different models refer to the actual
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2.3 Wiring Diagram:
LTDN32V68NAM
14 pin
14 pin
5 pin
Note:
The above Wiring Diagram is reference only, different models refer to the actual units to
determine the connectors.
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MSD309PX Chassis Series includes model:
Model Panel Mode LVDS(Main-Panel)
LTDN32V86NAM(1) T315HW04VD\JK\ROH HX2-2X20KLB350-CMO-1\ROH NO
LTDN32V68NAM T315HW04VD\JK\ROH HX2-2X20KLB350-CMO-1\ROH NO
LTDN32K26AM LC320EUN-SDV1\JK\ROHHX2-2X20KLB300P-LG-4\ROH NO
LTDN32V88NAM T315HW04VD\JK\ROH HX2-2X20KLB350-CMO-1\ROH NO
LTDN42V86NAM HC420EF-E01\ROH HX2-2X20KLB600P-LG-2\ROH NO
FFC-521-51P-2A\ROH
LTDN40K26GAM LTA400HF24\JK\ROH
FFC-422-41P-2A\ROH
FFC-521-51P-2A\ROH
LTDN46K26GAM LTA460HJ14\JK\ROH
FFC-422-41P-2A\ROH
FFC-51P-563\ROH
LTDN40T26GAM LTA400HF16\JK\ROH
FFC-41P-476\ROH
LVDS Board
(120HZ)
Yes
Yes
Yes
LTDN40T28NGAM LTA400HF16\JK\ROH
FFC-51P-563\ROH
Yes
FFC-41P-476\ROH
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3. Factory/Service OSD Menu and Adjustment
3.1 To enter the Factory OSD Menu
a. With factory RC (remote control)
1. Press “M” button and enter factory mode.(Note1)
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
Note:
1. In the “Factory Menu”, item “Function”->”TOFAC” ,you can select “M” or “U”, default is “U”.
----M-Means you can enter factory mode with factory RC or user RC.
----U-Means you can enter factory mode only with user’s RC.
2. Mode “M” is only used for factory production.
b. With user’s RC
Power on the TV.
1. Press “Menu” button and call up User OSD Menu.
2. Select“ Sound” Menu-> “Balance” item.
3. Press number key 1->9->6 ->9 in sequence when “Balance” item is focused.
Note: If necessary, re-do number keys.
4. Factory OSD appears.
Note: Press the standby button then AC turn off and restart the TV, which can exit factory OSD menu.
3.2 Factory OSD Menu
The Factory OSD Menu comprises Factory Menu and Design Menu .
3.2.1、Factory Menu
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Factory Menu
White Balance
Auto Calibrate
Function
Init
Test Pattern
White Balance
RDRV:
GDRV:
BDRV
RCUT:
GCUT:
BCUT:
TEMPERATURE: Normal
Function
TOFAC : M or U
Power Mode Save
Software Update
LOGO: Hisense
OSD language: English
PVR RECORD ALL OFF
WDT: ON
UART Debug : None
3.2.2、Design Menu
Design Menu
Picture Mode
Audio Mode
Picture Curve
Audio Curve
SSC Adjust
Saving Mode
Overscan
Not Stand
Note:
The above “Factory/Service OSD Menu” is reference only, please refer to the actual units
to determine the appearances.
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4. Software Upgrading
4.1 Upgrading with the ISP_TOOL
4.1.1 Hardware connecting
You can update the software through a special tool (as following)
Connect the Debug board to the TV use VGA interface or the RS232 (4 pin), the other USB
port to the compute.
4.1.2 Install the ISP_TOOL4.5.0.4-------only for the first time update.
1、The software is upgraded by a burning tool- ISP_TOOL.exe
2、Find the folder where the ISP_TOOL4.5.0.4 lies in.
There are three folders/files in this folder together.
DLPORTIO.dll and FTD2XX.DLL must be in the same folder
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3、Double click the ISP_TOOL4.5.0.4 icon, and then a dialog window will show as below.
4、Click the” Config “button. And then a dialog window will show as below.
Draw on the front of “Use USB”
Port Type setting is USB
Base Addr setting is 0x38C
ISP Slave Address choose 0x92
Serial Debug Slave Address choose 0xB2,
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5、Click the “Connect”button,if appear the following figure, It indicates that the ISP_TOOL has
connected.(According to the tv set,”Device Type” maybe different.)
If appear the following figure,It indicates that the ISP_TOOL has not connected. Please click
the“DisCon”button and “Connect”button to connect..
6、Click the“Read ”button,Choose the correct update file。
7、After the update file has been chosen successfully。
Click the“Auto”button and choose parameters as following。
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8、Click the “Run” button and wait update end.
If show any error message ,then do “Dis Con” >> “Connect”,and click the “Run” button
again,till show the following dialog window。
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4.2 Upgrading with the USB
Software can update with USB device:
1. Copy the “*.BIN” file such as “MERGE.BIN” to the root directory of a USB disk.
2. Insert the USB disk into the USB slot of the TV SET.
3. Press “Menu” button and call up User OSD Menu, choose "Channel"->”Software
Update(USB)” item. (Note 1)
4. Press “OK”, it will show a confirm message box, Press [◀] button to select “yes” in the
confirm message box, to start automatic update.
5. Then it will update the software automatically, Please don’t power off during the updating
process.
6. After the software is successfully upgraded, TV SET will restart automatically.
Note:
1. In some TV SET, ”Software Update(USB)” item maybe in “OPTION” menu.
2.After updating, you must confirm the software version in the “Factory Menu” and you'd better
do " UnProtected Clear" in the “Factory Menu”.
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5. Circuit instruction
5.1 Power assign and block diagram
Power assign:
The Power board have 5V&12V output ,other voltages are converted from 5V&12V.
a. Vcc-Panel is co nverted by N1 from 12V,5V-Tuner converted by N21 from 12V supplies to tuner.
b. 3.3Vstb is converted from 5V-stb by N2, It’s standby power supply for main IC (N7), Keyboard, Remote
board ,Flash(N11)and HDMI CEC.
c. 12V supplies for Amplifier(N17
d. 5VAIN supplies for main IC , Headphone and USB
e. 3.3VA is converted by N4 from 5VAIN, It supplies for N39(main IC),N8(HDCP),N9(EEPROM).
f. 2.5VA is converted by N5 form 5VAIN.
g. 1.32V is converted by N3 from 5VAIN.
h. 1.8VA is converted by N6 from 5VAIN.
i. 3.3V_Demod is converted by N18 from 5VAIN, 1.2V_Demod is converted by N19 from 3.3V_Demod.
R2A15120FA).
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OW
O
Block diagram:
12V
5V-stb
RD
ER BA
P
AO3401
N1
78D05
N21
R2A15120FA
N17
1117-3.3
N2
1084-ADJ
Vcc-Panel
5V-Tuner
Flash
N11
Remote
3.3Vstb
Keyboard
1.8VA
N6
5VAIN
MP1482
N3
1117M3ADJ
N5
1117-3.3A
N4
AP2172SG
N15
1117A-3.3A
N18
Headphone
XS16
1.32V
N7
2.5VA
MSD309PX
3.3VA
24C04
N8
24C32(EEPROM)
N9
5V-USB
3.3V-Demod 1.2V-Demod
11117-1.2
N19
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5.2 Image and signal process
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5.3 Troubleshooting
5.3.1 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
NO
Change Led & IR cable
NO
Replace main board
YES
Replace Led & IR BD
YES
Replace Led & IR cable
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5.3.2 Troubleshooting for Function Key
Buttons does not work
Check switches
YES
Check solder connections and
see if any switches are stuck.
NO
Check key board
NO
Check Key BD cable
YES
Replace Key BD
YES
Change Key BD
OK
NO
Replace main board
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5.3.3 TV won’t Power On
TV won’t power on
Is LED
light?
NO
Check Power
Output
YES
Make Sure Power
source is live
YES
NO
BLUE
RED
Panel Bright
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
(to contact Hisense tech support.)
Replace Main BD
Replace Panel
OK
YES
Power on
NO
Replace Power BD
YES
OK
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5.3.4 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
Power Supply Board
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5.3.5 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 cab l e
NO
Replace main board
Reconnect
Replace cable
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5.3.6 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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5.3.7 Troubleshooting for Videoinput
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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6. Schematic circuit diagram
7. Explode View
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5
4
3
2
1
Power InputInverter Interface
100n/16VC1100n/16V
100n/16VC4100n/16V
L3
L3
L4
L4
+12V
5VAIN
5VAIN
C1
C4
C263
C263
220u/16V/NC
220u/16V/NC
5Vstb
C265
C265
100u/16V/NC
100u/16V/NC
VCC-A
+12V
C3
100n/16VC3100n/16V
C264
C264
220u/16V/NC
220u/16V/NC
3.3VA
R5
10kR510k
L:ON
H:OFF
ON_PBACK2
ADJ-PWM2
STANDBY
R61kR6
1k
MMBT3904LT1
MMBT3904LT1
XP1XP1
1
2
3
4
5
BL-ON/OFF
6
BL-ADJUST
XP2XP2
7
8
9
10
11
12
STANDBY
13
14
+12V
STPB3216-121PT
STPB3216-121PT
1
2
STPB3216-121PT/NC
STPB3216-121PT/NC
3
4
5
6
7
8
9
10
11
12
13
DD
CC
5VAIN
R40RR40R
3
1
2
R121kR121k
Note: Left C7 NC, R12 change to 100ohm if want to output PWM puls