JVC MSD209GL User manual

LCD Television
Service Manual
Chassis：MSD209GL
Product Type：
Ver 1.0
Electric Co.，.
April，2010

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LCD TV Service Manual
Hisense Confidential
Contents
Contents............................................................................................................................................... - 2 -
Service Manual.................................................................................................................................... - 3 -
1. Precautions and notices.............................................................................................................. - 3 -
1.1 Warning............................................................................................................................. - 4 -
1.2 Notes ................................................................................................................................. - 7 -
2. Factory/Service OSD Menu and Adjustment............................................................................. - 9 -
2.1 To enter the Factory OSD Menu....................................................................................... - 9 -
2.2 Factory OSD Menu........................................................................................................... - 9 -
3. UPDATE SOTFWRE............................................................................................................... - 13 -
4. Troubleshooting ....................................................................................................................... - 14 -
4.1 Troubleshooting for Remote Control.............................................................................. - 14 -
4.2 Troubleshooting for Function Key.................................................................................. - 15 -
4.3 TV won’t Power On........................................................................................................ - 16 -
4.4 Troubleshooting for Audio.............................................................................................. - 17 -
4.5 Troubleshooting for TV/VGA/HDMI input.................................................................... - 18 -
4.6 Troubleshooting for YPbPr input....................................................................................- 19 -
4.7 Troubleshooting for Video/S-Video input....................................................................... - 20 -
5. Explode View........................................................................................................................... - 21 -
6. Schematic circuit diagram........................................................................................................ - 21 -

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LCD TV Service Manual
Hisense Confidential
Service Manual
1. Precautions and notices
BEFORE SERVICING THE LCD TV, READ THE SAFETY PRECAUTIONS IN
THIS MANUAL.
USE ONLY MANUFACTURER SPECIFIED REPLACEMENT PARTS WHEN
SERVICING.
USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S
WARRANTY
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 and pose risk of personal injury
. It is also important to understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. Service should only be performed by an experienced electronics

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LCD TV Service Manual
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techician trained in the proper Television safety and service methods and procedures
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 non-manufacturer's recommended parts 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.
Servicetech assumes all liability.
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, be sure to
use anti-static table mats and properly use a grounding wrist stra. Keep components and
tools also at this same potential.
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.

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LCD TV Service Manual
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IMPORTANT:
Always disconnect the power cord from AC outlet before replacing parts or modules.
1.1.3
To prevent electrical shock, use only a properly grounded 3 prong outlet or extension
cord.
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 and will void the
manufacturer's warranty.
1.1.5
Safety regulations require that after a repair the set must be returned in its original
condition. In addition, prior to closing set, check that:
-Note:
>All wire harnesses and flex cables are properly routed and secured with factory tape
and/or mounted cable clamps.
> All cables and connectors are properly insulated and do not have any bare wires/lead
exposed.

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LCD TV Service Manual
Hisense Confidential
1.1.6
(1) Do not supply a voltage higher than that specified to this product. This may
damage the product and may cause a fire.
(2) Do not use this product:
> High humidity areas
> In an area where any water could enter or splash into the unit.
High humidity and water could damage the product and cause fire.
(3) 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.
(4) 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.
(5) Do not pull out or insert the power cable from/to an outlet with wet hands. It may
cause electric shock.
(6) Do not damage or modify the power cable. It may cause fire or electric shock.
(7) 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.
(8) 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.
(9) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer,

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LCD TV Service Manual
Hisense Confidential
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
equipment and the high voltage power supply block, it can result in electric shock or
may trip the main 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

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LCD TV Service Manual
Hisense Confidential
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.
• 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.
• 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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LCD TV Service Manual
Hisense Confidential
2. Factory/Service OSD Menu andAdjustment
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
Factory Menu
Panel
Software Version
WhiteBalance
Auto Color
Optons
Clean All
Clean Protect
Test Pattern

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LCD TV Service Manual
Hisense Confidential
White Balance
Mode
R-GAIN:
G-GAIN:
B-GAIN:
R-OFFSET:
G-OFFSET:
B-OFFSET:
TEMPERATURE
Auto Color
MODE
AUTO ADC
R-GAIN:
G-GAIN:
B-GAIN:
R-OFFSET:
G-OFFSET:
B-OFFSET:

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LCD TV Service Manual
Hisense Confidential
2.2.2、Design Menu
Design Menu
Color Temperature
Video Curve
Picture Mode
Audio Curve
Sound Mode
EMC Adjust
Over Scan
Test Pattern OFF
Options
TOFAC M
Logo Hisense
OSD language English
HDCP Mode outside
HIDEV off

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LCD TV Service Manual
Hisense Confidential
Audio Curve
Curve _0
Curve _25
Curve _50
Curve _75
Curve _100
MODE ATV VOL
AV VOL
HDMIVOL
120HZ/500HZ/
1.5KHZ/5KHZ
/10KHZ
Video Curve
MODE Brightness
Sharpness
Color
Contrast
TINT
Curve _0
Curve _25
Curve _50
Curve _75
Curve
100
Sound Mode
120HZ
500HZ
1.5KHZ
5KHZ
10KHZ
Mode Standard
Music
Movie
Speech
Picture Mode
Mode
Picture Mode Standard
Soft
User
Bright
BRIGHTNESS 50
C0NTRAST 50
COLOR 50

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LCD TV Service Manual
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Note：
The above “Factory/Service OSD Menu”are reference only, please refer to the actual units to
determine the appearances.
3. UPDATE SOTFWRE
MSD209 Series can update with USB, the software name should be merge.bin.
The Updating Steps : turn on the TV then insert the USB(the update file merge.bin
should in root directory), you should go to Option->Software Update(USB) in the main
menu. After the updating，TV will reboot。
If enter the Software Update option，it can not update，please reboot the TV and insert
the USB again.
After the updating, you must confirm the software in the Factory Menu and you'd better
"Clear All".
Over Scan
H_Size
H_Pos
V_Size
V_Pos
SSC Adjust
SSC MIU
MIU SPAN
MIU STEP
SSC LVDS
LVDS SPAN
LVDS STEP

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LCD TV Service Manual
Hisense Confidential
4. Troubleshooting
4.1 Troubleshooting for Remote Control
Remote control does not work
Try new batteries
Replace RC
Check IR receiver
Change Led & IR board
Change Led & IR cable
Replace main board
Replace battery
Replace remote control
Replace Led & IR BD
Replace Led & IR cable
YES
YES
NO
YES
NO
YES
NO

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LCD TV Service Manual
Hisense Confidential
4.2 Troubleshooting for Function Key
Buttons does not work
Check switches
Check key board
Check Key BD cable
Change Key BD
Replace main board
Check solder connections and
see if any switches are stuck.
Replace Key BD
OK
YES
YES
NO
YES
NO
NO

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LCD TV Service Manual
Hisense Confidential
4.3 TV won’t Power On
Make Sure Power
source is live
Replace
Power Cord
Check/replace IR
BD or Keypad
PCA
TV won’t power on
Is LED
light?
NO
YES
Check Power
Output
YES
NO
Check Power
Cord
Only
one works
Replace Main
BD
Try Power on by
RC and Button
Neither
works Both
Work
Power on OK
YES
NO
Replace Power BD
YES
NO
RED
BLUE
Panel Bright
NO
Replace Main BD
NO
YES Check signal
Source
YES
NO
YES
Replace Panel
(to contact Hisense tech support.)
OK

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LCD TV Service Manual
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4.4 Troubleshooting forAudio
No sound
Check connecter
Check speaker wire
Replace main board
Reconnect
Replace speaker wire
YES
YES
NO
NO
Check speaker set Replace speaker set
YES
NO
OK
YES
NO
Power Supply Board

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LCD TV Service Manual
Hisense Confidential
4.5 Troubleshooting for TV/VGA/HDMI input
No picture on the screen
Check Signal Source
Check connect
Check cable
Replace main board
Make sure signal
source is available
Reconnect
Replace cable
NO
YES
YES
NO
NO

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LCD TV Service Manual
Hisense Confidential
4.6 Troubleshooting forYPbPr input
No picture on the screen
Check Source work or not
Check connect
Check Wires (Green Blue, Red)
Replace main board
Check Source Device
Reconnect
Replace wires
NO
YES
YES
NO
YES
NO

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LCD TV Service Manual
Hisense Confidential
4.7 Troubleshooting for Video/S-Video input
No picture on the screen
Check Source work or not
Check connect
Check Cable/ Wires
Replace main board
Check Signal Source
Reconnect
Replace Cable/Wires
NO
YES
YES
NO
YES
NO