Service Manual ....................................................................................................................................................- 2 -
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.
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, which are not recommended by Hisense, must first satisfy
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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
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(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 clamps.
-The insulation of the mains lead should be checked for external damage.
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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.
(7) Do not pull out or insert the power cable from/to an outlet with wet hands. It
may cause electric shock.
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(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 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
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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
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).
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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. Factory/Service OSD Menu and Adjustment
2.1 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.
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.
2.2 Factory OSD Menu
The Factory OSD Menu comprises Factory Menu and Design Menu .
2.2.1、Factory Menu
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FACTORY MENU
WHITE BALANCE
ADC ADJUST
LOGO
OSD LANGUAGE
COUNTRY
OPTIONS
FACTORY INIT
TEST PATTERN
VERSION
NON STANDARD
ADC ADJUST
Only in component and VGA
SOURCE ,The “
Can be chosen.
ADC Adjust”
WHITE BALANCE
COL TEMP STANDARD
R CUT 128
G CUT 128
B CUT 128
R DRV 128
G DRV 128
B DRV 128
LOGO
NULL
HISENSE
WELCOME
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OPTION
SOURCE TV
TOFAC M
ATS 1
STARTUP MENU 1
Search Sensitive 1
RF NTSC 0
HDCP OUT OR IN 1
TEST PATTERN
TEST PATTERN NULL
FACTORY INIT
QINGDAO
HUANGDAO
HUNGARY
FRANCE
AUSTRALIA
CLEAR PROTECTLY
CLEAR UNPROTECTLY
The above “Factory/Service OSD Menu” are reference only, please refer to the actual units
to determine the appearances.
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3. Software Upgrading
Before upgrading, read the following.
1、Before upgrading,Write down the ADC Calibration values of the channel of VGA and
component。
2、Upgrade the software.
3、To clear the EEPROM .
A Select the item “Clear Unprotected”.
B Press VOL+ button to clear the EEPROM data.
C Close the OSD menu after 5 seconds.
D Restart the TV.
4 Write the ADC Calibration values copied just now into the the channels of VGA and
component.
5、After the operation above all, necessarily, Renew search the channels for the users.
3.1 Get ready for upgrading
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
3.1.1 Install the ISP_TOOL4.0.9-------only for the first time update.
1、 Port Setting:
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Choose “system”option from the “control panel”
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)
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Choose the ECP print port (LPT1)
Click the port of print (LPT1)as the following
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Choose “port setting”option as the following
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2、Find the folder where the ISP_TOOL4.0.9 lies in.
There are three folders/files in this folder together.
DLPORTIO.dll and FTD2XX.DLL must be in the same folder
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
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 on the front of “Reverse High”。
As following
Choose “SDA out”and setting “PIN” is “PIN4”
Notes:
Draw on the front of “Reverse High”。
As following。
Choose “SCL out”and setting “PIN” is “PIN2”
Notes:
Draw on the front of “Reverse High”
As following
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After having finished all above, clicking the “Apply ”button to complete the configuration。
3.1.2 Hardware connecting
You can update the software through a special tool (as following)
Connect the Debug board to the TV use VGA interface, the other parallel port to the
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computer, just as the following。
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3.2 Upgrading with the ISP_TOOL4.0.9
3.2.1 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
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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The above appears on the screen-the word “program ok”shows in the information
displaying window,indicating upgrading is ov er。
3.2.2 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.
3.3 USB Software upgrading
3.3.1、Copy the Updating software to the USB root directory, the software named
*.bin. for example the TV LCD19W58AM(30) named LCD19W58AM.bin. If the TV
has internet function, Insert the USB disk to the interface nearly the Tuner.
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3.3.2the “Function” Menu “Sof tware Up date”choose“on”,see the next figure。
3.3.3 ACpoweroff,thenrestarttheTV.
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3.3.4 After update success,ACpoweroff,andrestarttheTV.
3.3.5、 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”
d. Press VOL + button to clear the EEPROM data.
e. When the “Clear Unprotectly ” button becomes white, turn off the power.
f. Restart the TV.
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3.3.6、Chasis MST6E16 includes 6E16GS and 6E16JS
Chassis 6E16GS must be the last 8 bit figures and letters in front ot .bin For example :
LCD19W58AM(30) named D19W58AM.bin.
Chassis 6E16JS must be the TV name in front of.bin. For example : LCD19W58AM(30)
named LCD19W58AM.bin.
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4. Circuit instruction
4.1 Main board Power assign and block diagram
Power assign:
The Powerd only has 12V output ,other voltages are converted from 12V.
a. 5Vstb is converted by U10 from 12V,5VAIN and +5V_USB are converted by U7 from 5Vstb.
b. +3.3Vstb that standby power supply for main IC (U41)、Flash (U42)、EEPROM (U43)、HDCP EEPROM
(U21)、Key is converted by 5Vstb from U5.
c. U28 and U30 power supply from 5VAIN
d. +3 .3AVDD supply power for main is converted by U6 from 5VAIN; +2.6VM supply power for DDR is
converted by U8 from 5VAIN; VCC-1.26V supply power for main IC(core voltage) is converted by U9
from 5VAIN;
e +12V supply power for audio amplify is converted by U6 from +12V_IN; 5V-IN supply power for Tuner
is converted by U24from +12V_IN;
f VCC-Panel supply power for Panel is converted by U4 from 5VAIN or +12V_IN
Block diagram:
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4.2 Image and signal process
e. RF Signal
RF Signal pass Tuner(U22) and surface acoustic wave filter(U23、U25) then output SIF and VIF signal,
which input to the main IC to have convert.
f. AV Signal
The video signal of AV input from terminal XS2,last enter the pin 37 of U41. as following
The CVBS video signal of SCART input from terminal XS39, last enter the pin35 of U41.
as following
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The YC video signal of S-Video input from terminal XS31, last enter pin 32、33 of U41. as
following
The RGB video signal of SCART input from terminal XS39, Ypbpr video signal of SCART input
from terminal XS7. The two signals pass U30 (IC\P15V330Q), then enter pin17-20 of U41. last pass
XP11/J2 directly output to the Panel
a
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b
PC(VGA)signal input from Terminal XS39, after having converted,. last enter the pin 22、24、
25、26 of U41.
Audio signal of HDMI and USB directly input IC U41.
Output of Scart (owning to have CANAL+ function , only output RF Signal)which by Pin 40 of
U41, As the following amplified circuit.. Output from terminal XS39.
g. Audio Signal (except HDMI and USB)
Audio Signal of TV is that the SIF signal pass through Tuner(U22) and surface acoustic wave
filter(U23、U25) was converted by U41.
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Audio XS7(YPbPr and VGA mutual the channel) Audio XS2 (AV and SV mutual the channel)
2. Control Process:
The Power only has 12V output ,other voltages are converted from 12V. U4 and U7 can interrupt other
voltages while standby, only reserve standby 5V. as following. When TV Power on , Standby Signal is High
level, 5VAIN Power suppluy no rmally ; When TV standby , the U7 tuner swi tch is shut off , 5VAIN Power
suppluy is low.
+12V standby signal control as similar as +5V
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The video input signal of SCART RGB and Component was converted by U30, controlled by AU-SW0
signal. According current signal choose one channel output from 4、7、9 of U30
The control method as following:
Current channel AU-SW0 Switch output signal
Component Low level Component YPbPr
SCART High level SCART RGB
The audio input signal of SCART and AV was converted by U28, controlled by AU-SW0、AU-SW1
signal. According current signal choose one channel output from 3、13 of U U28
The control method as following:
Current channel AU-SW0 AU-SW1 Switch output signal
AV/SV Low level x AV/SV L/R
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SCART High level x SCART RGB
The main control signal, as list:
Control Signal
Standby signal(Power
control)
BL-control
L VDS VCC
Audio amplify mute AMP-MUTE High level mute
33V PWM
Key “0” Key0-in Key
Internet mark
STANDBY
PW_CTL High level power on
BL-ON/OFF
ON_PBACK Low level power on
ON_Panel High level TCON on
PWM3
recommendRemark
High level power on
High level power on
33V rising voltage circuit
PW_CTL pass V1、V26
inverse phase
ON_PBACK pass V2
inverse phase
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Key “1” Key1-in Key
Remote control signal IR-SYNC IR
4.3 The main IC description
74HC4052D:
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AOZ1021
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RF7314
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MP1482
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TPA1517
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4.4 Troubleshooting
4.4.1 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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4.4.2 Troubleshooting for Function Key
Buttons does not work
Check switches
YES
Check solder connections and
see if any switches are stuck.