2.4 TV main Parts .................................................................................................................................. - 16 -
3. Factory/Service OSD Menu and Adjustment ............................................................................................. - 16 -
3.1 How to enter the Factory OSD Menu .............................................................................................. - 16 -
3.2 Factory OSD Menu .......................................................................................................................... - 16 -
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 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
- 4 -
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
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.
- 5 -
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 thi s 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.
- 6 -
-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.
(7) Do not pull out or insert the power cable from/to an outlet with wet hands. It may
- 7 -
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 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
- 8 -
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
short-circuits due to residual electric charge.
• Routing of the wires and fixing them in position must be done in accordance with the
- 9 -
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.
- 10 -
2. Product Specifications
2.1 Main board layout
2.1.1 1Main board: 6012
Take LHD32K260AM(6168)for example.
Top:
Flash
MSD6308
- 11 -
Side terminals:
Coaxial
Side terminals:
Cable
Air
HDMI
VGA Audio
VGA
COMP/AV
- 12 -
2.2 TV Front and TV Rear
LHD32K260AM TV Front:
- 13 -
LHD32K260AM TV Rear
- 14 -
2.3 Spec.
LHD32K260AM
- 15 -
2.4 TV main Parts
TV Panel Mode LVDS(Main-Panel)
LHD32K260AM
HD315DH-F13
HX2-2×20KLB90P\90.0\无\ROH RSAG2.908.6168\ROH
Main board &Power
board
3. Factory/Service OSD Menu and Adjustment
3.1 How to enter the Factory OSD Menu
With user’s RC
Power on the TV.
1. Press “Menu” button and call up User OSD Menu.
2. Select “ Sound” -> “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 “exit” key on the RC, which can exit factory OSD menu.
Chassis
MSD6308RT-A1G
3.2 Factory OSD Menu
The Factory OSD Menu comprises Factory Menu and Design menu.
3.2.1、Factory Menu
White balance:
- 16 -
Option:
Init:
- 17 -
Version:
3.2.2、Design Menu
- 18 -
Note:
The above “Factory/Service OSD Menus” are reference only, please refer to the actual
unit to determine the appearances.
4. Software updating
Software updating includes Mboot write and main software update. Usually first write
Mboot to nand flashWith (MSTV_Tool.exe) then can update main software With SecureCRT.
4.1 Updating main board with SecureCRT
4.1.1 Hardware connecting
You can update the software through a special tool (as following)
Connect the Debug board to the TV use the RS232 (4 pin), the other USB port to the PC.
- 19 -
For mstar chassis,the bebug boad set as following.
Mstar c hassis connect or t o t he
leftmost.
For MTK chassis,the bebug boad set as following.
MTK chassis connector to t he
second.position.from left.
- 20 -
4.1.2
First use Mstar bebug Tools,and you have to install drive software for bebug board.
If your PC is Windows XP system:
1、First install FTCUNIN.EXE of FTC100103(MSTAR) rar file in your PC.
This is a drive software of Mstar
Another:
If your PC is Win7 system, you will have to install CDM20802_Setup_WIN7 rar file,and then
open the software of SecureCRT in your PC.
Now you c an upgrade the USBUpgrade.bin file with serial command following the steps in
section 1.
- 24 -
4.3 Upgrading with the USB disk
4.3.1 TV in normal state
1. Copy the “USBUpgrade.bin” file that MBoot and main software named to the root directory
of two USB disks respectively.
2. Insert the USB disk into the USB slot of the TV SET.
3. Press “Menu” button of remote control and call up Factory OSD Menu, choose "
OPTION "->”Software Update(USB)” item.
Detail see 3.1 HowtoentertheFactoryOSDMenu
4. Press the
Press button to select “yes” in the confirm message box, then TV will automatic
update.
5. Then it will update the software automatically, Please don’t power off during the updating
process.
key on RC, it will show a confirm message box, Are you sure?
- 25 -
6. After update succeeds, TV SET will restart automatically.
7. First update the Boot software, second update the main software. In order to
convenience, prepare two USB disks to save different software respectively.
- 26 -
5.Troubleshooting
5.1 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
- 27 -
5.2 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 B D
OK
NO
Replace main board
- 28 -
5.3 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
- 29 -
5.4 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
- 30 -
5.5 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
- 31 -
5.6 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
- 32 -
5.7 Troubleshooting for 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
6. Circuit instruction
Board signal process and power tree
- 33 -
- 34 -
7. Schematic circuit diagram
8. Explode View
- 35 -
5
4
3
2
1
5V_STB/2A
0R
DD
12V
TPS54328
12V
5VAIN/3A
PWR-ON/OFF
IN
5VAIN
POWER IN
IN
+12V
CC
X3
X1VGA
X1
X1
X2
X1
HDMI1
HDMI2
HDMI3
YUV
AVAV
USB1
USB2
RJ45
MSD6308RT
MHL
输入
HDMI
VGA
输入
BB
YUVI
输入
输入
输入
USB
网络输入
12V/2A
AMS1117-3.3V +3.3V_Standby/300MA
+5V_MHL/1ASWITCH
NAND_FLASH
2GBITS
SPI FLASH
16MBITS
EEPROM
32KBITS
PANELLVDS
TAS5707
EARPHONE
+1.15V_VDDC/3A
+1.5V_DDR/250MA
+3.3VAl/200MAAMS1117-3.3V5VAIN
L_OUT
R_OUT
MP1495
1117ADJ
AMS1117-3.3V 3.3V_Tuner/250MA5VAIN
FUSE5V_USB/1A5VAIN
MOSVCC-Panel /1.5A 0R
TAS5707
I2C
L
R
L
R
MSD6308RT
AV_OUT
输出
音视频
L/R_OUT
遥控接收、键控板
3
2
1
AV_L/R
IF1
TUNER
输入
AA
5
IF2
IF
VGA_L/R
音频输入
4
YUV_L/R
X3AV
Power Input
5
4
3
2
1
BL-ON/OFF
BL-ON/OFF 1
BL-ADJUST
BL-ADJUST 1
VBL_CTRL2
5VS
DD
C447
10u/16V
12VS
C448
10u/10V
5VS
BLM21PG220SN1D
5Vstb
L55
+3.3V_Standby
R8
4.7k/NC
R22
0R/NC
3.3VA
R20
4.7k/NC
R11
4.7k
R12
4.7k
VBL_CTRL
BRI_ADJ
BRI_ADJ2
1
0R/NC
R13
R14
1k
V6
MMBT3904LT1
23
1
5VAIN
V10
MMBT3904LT1
23
R15
4.7k
R16
0R
BL-ON/OFF
R17
1k
BL-ADJUST
R18
C4
4.7k/NC
10u/16V/NC
Power for Panel
12VS
R45
12VS
100k
C11
100n/16V
R43
1
4.7k
V13
MMBT3904LT1
23
R44
100k
+3.3V_Standby
CC
PWR-ON/OFF2
H:ON
L:OFF
PWR-ON/OFF
R40
1k
R41
10k
C44
100n/16V
1
2
3
4
+12V
C15
10u/16V
5V Power-12V/5V
12VS
R235
10k
C226
C230
10u/16V/NC
10u/16V
靠近
DC-DC
C211
C225
1u/25V
100n/16V
BB
Core Power 1.15V-MP1495(3A)
+12V
C244
10u/16V
C31
100n/16V
10u/16V
R35
100k
R36
33k
C39
C231
100n/16V
2
7
6
8
IN
VCC
EN/SYNC
FB
C212
8.2n/50V
N8
MP1495
8
VIN
1
EN
3
VRG5
SS4GND
R250
100k/NC
SW
SS
BST
GND
N7
TPS54528
9
3
1
5
4
VBST
EPAD
1n/50V
N40
AO4459
S1
S2
S3
G
SW
VFB
R58
10k
C37
R34
10R
8
D1
7
D1
6
D2
5
D2
6
C216
7
100n/16V
2
5
6.8uH
C242
100n/16V
+12V
L08
4.7 uH
R224
R1
130k
R219
22R/NC
R220
27k
C215
1n/50V/NC
Vout=0.765*(1+R1/R2)=5.16V
R1:130k, R2:27K//140K.
L09
C241
15p/50V
R49
0R
R39
82k
5VS5VAIN
R46
C12
10k
100n/16V
R47
1k
MMBT3904LT1
5VS
C224
C234
22p/50V
22u/6.3V
R229
140k
R2
+1.15V_VDDC
R255
22k
C243
22u/6.3V
R249
48.7k
C16
1u/16V
V28
靠近电感
C240
22u/6.3V
1
2
3
4
23
C233
22u/6.3V
N42
AO4459
S1
S2
S3
G
1
L08和DC-DC
22u/6.3V/NC
D1
D1
D2
D2
R48
10k
放置
C235
C247
100n/16V
8
7
6
5
C64
22u/6.3V
PWR-ON/OFF
C13
1u/16V
PANEL_ON/OFF2
1.5V Normal Power for DDR3
+12V
5VAIN
3.3VA
5VAIN
C54
100n/16V
L5
BLM18PG121SN1
L40
BLM18PG121SN1/NC
R33 10k
C60
10u/10V/NC
C19
C20
10u/16V
100n/16V
R78 10k
R31
0R/NC
R38
10k/NC
100n/16V
N36
SPX1117M3-ADJLD1117A-ADJ
3
VOUT
VIN
VOUT
ADJ
1
SOT-223
1
C32
V8
MMBT3904LT1
23
4
2
R27
20k
R32 1k
VDD_Panel
C38
1u/25V
1
R59
1k
R60
200R
2
V19
1
R29
10k
V15
MMBT3904LT1
23
AO3401L
10u/10V
3
C33 100n/16V/NC
L07
BLM18PG121SN1
250mA
C56
VCC-Panel
+1.5V_DDR
C34
10u/16V
C35
100n/16V
3.3V Standby Power
5VS+3.3V_Standby
L80
BLM18PG121SN1
AA
C48
C49
100n/16V
2.2u/10V
1.25 x _1+180/110_ = 3.3V
5
N17
3
VIN
SPX1117M3-ADJLD1117A-ADJ
4
VOUT
2
VOUT
ADJ
1
R30
110R
R28
180R
C51
10u/10V
Main IC Max:300mA
C50
100n/16V
3.3V Normal Power
5VAIN
L60
BLM21PG220SN1D
100n/16V
4
C396
N35
LD1117A-3.3AZ1117H-3.3
3
VIN
C741
10u/10V
R68
0R
3.3VA
L63
BLM21PG220SN1D
VOUT
VOUT
ADJ
1
DVDD3V3
R67
4
2
0R/NC
C732
22u/6.3V
3.3VA
C733
22u/6.3V
C1113
100n/16V
Hisense Electric Co.,Ltd.
Hisense Electric Co.,Ltd.
Hisense Electric Co.,Ltd.
No.11,Jiangxi Road,Qingdao,China