In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.
Parts marked with "" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
Page 2
LC-37D44E/S/RU-BK/GY
LC37D44E-BK
SAFETY PRECAUTION
Service Manual
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the
servicing guidelines which follow:
WARNING
1. For continued safety, no modification of any circuit should be
attempted.
2. Disconnect AC power before servicing.
CAUTION: F O R C ON TI N U E D PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
F7101, F7103 (250V 3.15A)
• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.
• Connect the resistor connection to all exposed metal parts having a
return to the chassis (antenna, metal cabinet, screw heads, knobs
and control shafts, escutcheon, etc.) and measure the AC voltage
drop across the resistor.
All checks must be repeated with the AC cord plug connection
reversed. (If necessary, a nonpolarized adaptor plug must be used
only for the purpose of completing these checks.)
Any reading of 1.05 V peak (this corresponds to 0.7 mA peak AC.)
or more is excessive and indicates a potential shock hazard which
must be corrected before returning the monitor to the owner.
F7102 (250V 1A)
DVM
AC SCALE
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform the following
safety checks:
3. Inspect all lead dress to make certain that leads are not pinched,
and check that hardware is not lodged between the chassis and
other metal parts in the receiver.
4. Inspect all protective devices such as non-metallic control knobs,
insulation materials, cabinet backs, adjustment and compartment
covers or shields, isolation resistor-capacitor networks, mechanical
insulators, etc.
5. To be sure that no shock hazard exists, check for leakage current in
the following manner.
• Plug the AC cord directly into a 220~240 volt AC outlet.
• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.
Many electrical and mechanical parts in LCD color television have
special safety-related characteristics.
These characteristics are often not evident from visual inspection, nor
can protection afforded by them be necessarily increased by using
replacement components rated for higher voltage, wattage, etc.
Replacement parts which have these special safety characteristics are
identified in this manual; electrical components having such features
are identified by “” and shaded areas in the Replacement Parts
List and Schematic Diagrams.
For continued protection, replacement parts must be identical to those
used in the original circuit.
The use of a substitute replacement parts which do not have the same
safety characteristics as the factory recommended replacement parts
shown in this service manual, may create shock, fire or other hazards.
i
Page 3
LC-37D44E/S/RU-BK/GY
PRECAUTIONS FOR USING LEAD-FREE SOLDER
Employing lead-free solder
• “PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The
alphabetical character following LF shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper.Indicates lead-free solder of tin, silver and copper.
Using lead-free wire solder
• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering
bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
Soldering
• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor
solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be
peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the
steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as
required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
• Be careful when replacing parts with polarity indication on the PWB silk.
• As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for
product improvement without prior notice. The performance specification figures indicated are nominal values of production
units. There may be some deviations from these values in individual units.
NOTE
• Refer to inside back cover for dimensional drawings.
Optional accessory
The listed optional accessories are available for the
LCD colour TV. Please purchase them at your nearest
shop.
• Additional optional accessories may be available in near
future. When purchasing, please read the newest catalogue
for compatibility and check the availability.
Part namePart number
Wall mount bracket
(LC-37D44E, LC-37D44S, LC-37D44RU)
1 – 1
AN-37AG5
Page 5
[2] OPERATION MANUAL
Remote control unit
1(Standby/On)
Enter standby mode or turn on the
power.
2AVMODE
Select a video setting.
30–9
Set the channel in TV and DTV mode.
Set the page in Teletext mode.
When one of the 4 Nordic countries
(Sweden, Norway, Finland or
Denmark) is selected in the country
setting of Auto Installation, DTV
channels are 4 digits. When another
country is selected, DTV channels
are 3 digits.
4(Flashback)
Press to return to the previous selected
channel or external input mode.
5(WIDE MODE)
Select the wide mode.
6(Sound mode)
Select the sound multiplex mode.
(See below.)
7 EPG
DTV: To display EPG (Electronic
Programme Guide) screen.
8 ESG
DTV: To display ESG (Electronic Service
Guide) screen.
9(Teletext)
Select the TELETEXT mode.
DTV: Select DTV data broadcasting and
TELETEXT.
10/ / /(Cursor)
Select a desired item on the setting
screen.
11 END
Exit the menu screen.
12(Reveal hidden Teletext)
13(Freeze/Hold)
Usingon the remote control unit
DTV mode:
Pressto open the multi audio screen.
Analogue TV mode:
Each time you press, the mode switches as illustrated in the following
tables.
NICAM TV broadcasts selection
SignalSelectable items
Stereo
Bilingual
Monaural
NOTE
• When no signal is input, the sound mode will display “MONO”.
NICAM STEREO, MONO
NICAM CH A, NICAM CH B,
NICAM CH AB, MONO
NICAM MONO, MONO
1
2
3
4
5
6
7
8
9
10
11
12
13
14 SURROUND
Switch the surround effects on and off.
15 RADIO
DTV: Switch between RADIO and DTV
mode.
16(Mute)
Switch the sound on and off.
A2 TV broadcasts selection
SignalSelectable items
Stereo
Bilingual
Monaural
STEREO, MONO
CH A, CH B, CH AB
MONO
LC-37D44E/S/RU-BK/GY
17 DTV
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Press to access DTV mode while
watching other input sources, and vice
versa.
(This button will not work if you were
watching DTV immediately before
turning off the TV. In this case first select
any other input source except DTV
using thebutton.)
18( / ) (Volume)
( ) Increase the volume.
( ) Decrease the volume.
19 P (/)
TV/DTV: Select the channel.
External: Switch to TV or DTV input
mode.
Teletext: Move to the next/previous
page.
• Only if you use an active terrestrial antenna, select “On (5V)” under “Supply Voltage”.
9
11
12
7 OUTPUT (AUDIO) terminals
8 EXT 6 (HDMI/AUDIO) terminals
9 EXT 7 (HDMI) terminal
10 COMMON INTERFACE slot
11 EXT 3 terminals
12 Headphone jack
13 AC INPUT terminal
1 – 3
WARNING:
Make sure that the volume is turned
down before using or connecting
earphones and headphones.
Listen to audio at moderate levels.
Excessive sound pressure from
earphones and headphones can
cause hearing loss.
Page 7
LC-37D44E/S/RU-BK/GY
Troubleshooting
ProblemPossible Solution
• No power.
• Unit cannot be operated.• External influences such as lightning, static electricity, etc., may cause improper
• Remote control unit does not
operate.
• Picture is cut off.• Is the image position correct?
• Strange colour, light colour, or
dark, or colour misalignment.
• Power is suddenly turned off.• The unit’s internal temperature has increased.
• No picture.• Is connection to other components correct?
• No sound.• Is the volume too low?
• The DTV menu screen is displayed
in monochrome and hard to select
the item.
• The TV sometimes makes a
cracking sound.
• Check if you pressedon the remote control unit.
If the indicator on the TV lights up red, press.
• Is the AC cord disconnected?
• Check if you pressedon the TV.
operation. In this case, operate the unit after first turning the power off, or
unplugging the AC cord and re-plugging it in after 1 or 2 minutes.
• Are batteries inserted with polarity (+, -) aligned?
• Are batteries worn out? (Replace with new batteries.)
• Are you using it under strong or fluorescent lighting?
• Is a fluorescent light illuminated to remote control sensor?
• Are screen mode adjustments (4:3 Mode/WSS) such as picture size made
correctly?
• Adjust the picture tone.
• Is the room too bright? The picture may look dark in a room that is too bright.
• Check the colour system setting.
• Check the HDMI Setup setting.
Remove any objects blocking vent or clean.
• Check the power control setting.
• Is sleep timer set? Press SLEEP on the remote control unit until it sets to Off.
• Is input signal type selected correctly after connection?
• Is the correct input source selected?
• Is non-compatible signal being input?
• Is picture adjustment correct?
• Is the antenna connected properly?
• Is “On” selected in “Audio Only”?
• Make sure that headphones are not connected.
• Check if you pressedon the remote control unit.
• Check if “Monochrome” is set to “On”. If so, set it to “Off”.
• This is not a malfunction. This happens when the cabinet slightly expands and
contracts according to change in temperature. This does not affect the TV’s
performance.
Cautions regarding use in high and low temperature environments
• When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails or appear slightly
delayed. This is not a malfunction, and the unit will recover when the temperature returns to normal.
• Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed to direct sunlight or near a
heater, as this may cause the cabinet to deform and the LCD panel to malfunction.
Storage temperature: -20°C to +60°C.
IMPORTANT NOTE ON RESETTING THE PIN
We suggest that you remove the following instruction from the operation manual to prevent children from
reading it. As this operation manual is multilingual, we also suggest the same with each language. Keep it in a
safe space for future reference.
1 – 4
Page 8
LC-37D44E/S/RU-BK/GY
[3] DIMENSIONS
(mm)
637.0
585.0
52.0
824.4
903.8
465.0
200.0
463.8
366.9
89.6
95.3
270.0
100.0
200.0
1 – 5
Page 9
LC37D44E-BK
CHAPTER 2. REMOVING OF MAJOR PARTS
Service Manual
[1] REMOVING OF MAJOR PARTS
LC-37D44E/S/RU-BK/GY
1. Remove the 4 lock screws and detach the Stand .
2. Remove the PC Card Cover , 1 lock screw , 2 lock screws , 6 lock screws ,4 lock screws , 2 VESA Caps and 2 lock screws
and detach the Rear Cabinet.
1
3
2
4
5
6
7
8
7
Front Cabinet
PC Card Cover
3
6
4
5
9
9
Rear Cabinet
1
Stand
8
2
2 – 1
Page 10
LC-37D44E/S/RU-BK/GY
3. Disconnect the KM, LB, PD, SP, RA connectors and FFCs.
4. Remove the Speaker (L) , Speaker (R) .
5. Remove the LED PWB Unit .
6. Remove the Control Button .
7. Remove the KEY PWB Unit from Control Button.
8. Remove the 8 lock screws and detach the LCD PANEL from the Front Cabinet.
10
12
13
14
15
11
KEY PWB Unit
14
Control Button
[FFC]
[KM]
[LB]
[PD]
[RA]
[SP]
13
Front Cabinet
15
LCD PANEL
11
SP-R
LED PWB Unit
12
10
SP-L
15
2 – 2
Page 11
LC-37D44E/S/RU-BK/GY
25
18
24
28
31
26
19
32
28
Power PWB Unit
18
16
20
23
26
29
16
9. Remove the 1 lock screw , 5 lock screws , 2 lock screws and detach the Main Shield .
10.Remove the 2 lock screws and 1 hook and detach the Main PWB Unit .
11.Remove the 2 lock screws and detach the Mini AV PWB Unit and Mini AV Cover .
12.Remove the 2 lock screws and 2 hooks and detach the Power PWB Unit .
13.Remove the 2 lock screws and 4 hooks and detach the Inverter PWB Unit and Barrier Sheet .
17
2122
27
30
17
27
20
Main Shield
Mini AV Cover
19
Main PWB Unit
25
21
22
23
29
Inverter PWB Unit
31
30
Mini AV PWB Unit
24
32
Barrier Sheet
2 – 3
Page 12
LC-37D44E/S/RU-BK/GY
34
36
38
40
43
Stand Angle
44
37
33
35
37
39
41
42
Center Angle R
38
14.Remove the 1 lock screw and detach the Bottom Cover .
15.Remove the 4 lock screws and detach the Stand Angle .
16.Remove the 5 lock screws and detach the Center Angle R .
17.Remove the 5 lock screws and detach the Center Angle L .
18.Remove the 4 lock screws , LCD Angle A , LCD Angle B from the LCD Panel Unit .
36
35
LCD Angle B
43
39
Center Angle L
40
LCD Angle A
42
41
LCD Angle A
42
34
Bottom
Cover
33
LCD Angle B
43
4141
LCD Panel Unit
44
41
2 – 4
Page 13
LC-37D44E/S/RU-BK/GY
46
19.Remove the 14 lock screws and detach the LCD Panel Module Ass’y .
20.Remove the 4 lock screws and detach the 2 GND-PWB from Back Light Chassis Ass’y .
45
47
Back Light Chassis Ass'y
48
49
49
Lamp Holder L
Diffusion Sheet
Lamp Socket
Lamp Unit
Lamp Holder R
48
GNDPWB
47
48
GND-PWB
45
Diffusion Plate
46
LCD Panel Module Ass'y
2 – 5
Page 14
LC-37D44E/S/RU-BK/GY
LC37D44E-BK
CHAPTER 3. ADJUSTMENT
Service Manual
[1] After replacement of any PWB and/or IC for repair, note the following.
1. When replacing the following units, be sure to prepare the new units loaded with updated software.
MAIN-UNIT:DUNTKE449FM03
• Note that an IC into which ROM data is written is available for MAIN-UNIT servicing (see below)
2. After replacing the LCD panel, adjust the VCOM in the following procedure.
1) Enter the process adjustment mode.
2) Use the cursor keys / and P/ of R/C to select the item [ VCOM ADJ] on the page 11/11.
3) Press the OK key to verify that the adjustment pattern is displayed.
4) Use the + / - keys of VOL of L/C to adjust the flicker in the center of the screen to minimum.
5) When the optimal state is achieved in Step 4, press the OK key to turn the pattern to OFF.
[2] SOFTWARE UPDATING
There are 2 methods to update software in the VCTp: I2C method, RS-232C HyperTerminal and RS-232C Tera Term method.
• RS-232C method is allowed when the TV is working properly and the action should be only software upgrade.
1. RS-232C Method Description (HyperTerminal).
The hardware tools requirement are:
1. A Modem-null (Cross type) DB9 female to DB9 female cable.
2. Make the connections as indicated in the figure:
ComputerTVset
TV Set
RS-232C
IOIOI
Before using RS-232C updating method is necessary to configure a Terminal PC software. HyperTerminal has been selected as a Terminal software because it’s include in all Windows versions as an accessory, and you can find it inside “Accessories\Communications” folder. For this reason, please follow carefully the next steps:
1) First time HyperTerminal is used, it’s necessary to configure some settings. Follows next action to configure two connection: low speed
(9600bps) and high speed (115200bps).
2) Create a New Connection file with name “P55_9600bps”.
3) Select a free COM port and select the Port Settings properties as follows:
3 – 1
Page 15
4) Click on “File\Properties” menu for selecting the General and ASCII properties as follows:
5) Select “New Connection” in the File Menu.
6) Answer “Yes” to close current connection and “Yes” to save session “P55_9600bps”.
7) Create a new connection with the name “P55_115200bps”.
8) Select a the same COM port used in item 2 and select the Port Settings properties as follows:
LC-37D44E/S/RU-BK/GY
9) Select the same General and ASCII properties as item 3.
10)Close HyperTerminal session, answering “Yes” to close current connection and “Yes” to save session “P55_115200bps”.
To start updating session, click over “P55_9600bps” icon that you can find in the “START\All programs\Accessories\ Communications\HyperTerminal\HyperTerminal” folder and follow next procedure:
3 – 2
Page 16
LC-37D44E/S/RU-BK/GY
1) Check the connection between TV set and PC, sending a wrong command, as for example: “aaa”. TV set returns an “ERR” label as an syn-
taxes ERROR (Not correct order or sequence).
2) Send the command “DWMD” to enter TV set in Download Mode. The TV set answer sending same symbol continuously. If this symbol charac-
ter doesn’t appear, please don’t worry and pass to next step.
3) Close this connection and open “P55_115200bps” connection clicking over the “P55_115200bps” that you can find in “START\All pro-
4) Using “Transfer\Send file...” menu, select desired file (.bin format) and the transmission protocol (Xmodem) as show below.
5) After press “Send” button the updating process starts as follows:
6) When flash update process finishes, the “Flash Programming Complete” label appears in the screen, the device automatically go to switch off,
and in a few seconds go to switch on again.
VERY IMPORTANT NOTE:
During the updating time, please don’t use the PC for other purposes, in order to abolish communication problems between TV set and PC.
If TV set was not updated properly, the TV won’t have the software to startup again, and you must follow the “I2C method” to update
another time the TV set.
3 – 3
Page 17
2. RS-232C Method Description (Tera Term)
The hardware tools requirement are:
1. A Modem-null (Cross type) DB9 female to DB9 female cable.
2. Make the connections as indicated in the figure:
ComputerTVset
LC-37D44E/S/RU-BK/GY
TV Set
Software requirements:
To upgrade VCTp software from RS-232C external connector is necessary to use a Tera Term (Pro) free software.
Copy all the distribution files to an empty floppy disk or temporary directory (for example C:\ TEMP).
Run SETUP.EXE and follow the instruction given by it.
After the installation, the distribution? les are no longer needed, you can delete them or may keep them in the floppy disk.
Ho w to us e Tera Te rm Pro :
When the Tera Term (Pro) program is used, it’s necessary to shape some settings. Follows next action to configure the connection:
RS-232C
IOIOI
3 – 4
Page 18
LC-37D44E/S/RU-BK/GY
1) Select: Serial→COM X→ O.K.
2) Select: Ter minal
3) Choose the same options as the above picture.
3 – 5
Page 19
4) Select: Setup→Serial port →O.K. Appear the follow screen:
5) Select follows settings:
Serial port to use: COM x
Baud rate:9600
Data:8 bits
Parity:none
Stop:1 bit
Flow control:none
Enter O.K.
LC-37D44E/S/RU-BK/GY
6) Check the connection between TV set and PC, sending a wrong command, as for example: “aaa”. TV set returns an “err” label as an syntaxes
ERROR (Not correct order or sequence).
Send a “DWMD” (capital letters) command to enter TV set in Download Mode.
Change a baud rate to 115200.
Select: Setup → Baud rate→115200 →O.K.
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Page 20
LC-37D44E/S/RU-BK/GY
7) Select: File → Transfer→XMODEM →Sent
8) Choose the file for upgrade and click “Open”.
9) After select “Open” the upgrade process starts as follows:
3 – 7
Page 21
LC-37D44E/S/RU-BK/GY
10)When flash update process finishes, the “Flash programming complete” label appear in the screen, the device automatically go to switch off, and
in a few seconds go to switch on again.
VERY IMPORTANT NOTE:
During the updating time, please don’t use the PC for other purposes, in order to abolish communication problems between TV set and PC.
If TV set was not updated properly, the TV won’t have the software to startup again, and you must follow the “I2C method”
another time the TV set.
3. How to update the Digital Board Software.
There are 2 methods to update the Digital Board Software on Flash Memory (IC4251) thought the Digital Processor (IC4001).
• RS-232 Method (From PC trough RS-232C COM port).
• PCMCIA CARD (Compact Flash Memory) Method.
NOTE: The PCMCIA method is only compatible with those PCs running XP Windows Version.
to update
3.1. Jig RS-232 Method Description
• Hardware requirements:
1. A modem null (Cross type) DB9 female to DB9 female cable.
2. Make the connections as in the below figure.
Computer
RS-232C serial control cable
(cross type, commercially available)
TVSet
(CITerminal)
TV Set
Jig
~
~
RS-232C
IOIOI
• Software requirements:
1. “Winupload” application software on PC.
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Page 22
LC-37D44E/S/RU-BK/GY
• How to setup the “Winupload” software for the first time:
1. Start “Winupload”. It will appear the following picture.
2. Select the most suitable RS232 Serial Port from “Port Setting” - “Process” Menu.
3. Select the following settings from “Port Settings” Menu.
Bits Per Second: 115200
Parity: None
Data bits: 8
Stop bits: 1
Hardware Flow Control: OFF
• Procedure for updating the TV set.
1. Switch off the TV set to be updated, in DTV mode.
2. Start “Winupload”. It will appear the following picture on PC.
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LC-37D44E/S/RU-BK/GY
3. Establish connection on Winupload Software.
4. Select “Upload URT file”
5. Select and open the “.urt” data file from data directory
NOTE: Consider the version shown below just an example, may be is not the latest one, and could be different depending on the TV set destination
(market/Country) or model.
6. Switch On the TV Set (previously in DTV Mode). The Uploading Process starts automatically.
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LC-37D44E/S/RU-BK/GY
While the TV set is uploading the software, the following information is shown on the TV set screen.
Then, data transfer from PC to TV set finishes when the “Upload progress completed” label appears in the “Winupload” screen. Now, the TV set made
some additional verification (Items #2 to #7). When the full uploading process is finished, in the “Winupload” window appears the label “Preparing to
start application” for a new TV Set, and just now, in the TV screen of the updated set, appears a congratulations label (Item #8).
NOTE: Do not turn off the TV set while the software updating was in progress.
7. Unplug the AC cord.
8. Disconnect the Jig from TV Set.
• Software Version verification procedure.
1. Connect the AC cord and Switch On the TV Set.
2. Select DTV Menu on TV Set. The following On Screen Display will appear.
3. Select “Version”. The updated version can be verified.
NOTE: Consider the version shown above just as example, may be is not the latest one, and could be different depending on the TV set destination
(market/Country) or model.
3 – 11
Page 25
LC-37D44E/S/RU-BK/GY
4. Software Version Upgrade Using Card
1. Write the software (ATV and DTV) on the PCMCIA CARD by following the procedure described in the separate document, “How to write software
(ATV and DTV) to PCMCIA CARD”.
(* In the document, both ATV and DTV are written; you may write either of them.)
(You can equally use any version after “Storage Media Manager Version 1.3.1”.)
2. Turn off the power.
(* You can select either of the mode ATV or DTV. In this document, ATV is selected.)
3. Insert the PCMCIA CARD with the upper side facing up into the card slot.
(* Do not insert the card with the upper side facing down.)
4. Turn on the power. After a short time, the message, “SYSTEM SOFTWARE UPDATE IN PROGRESS. ...) appears and the software upgrade
starts.
If the ATV software upgrade is necessary, the step proceeds to (5); if unnecessary, the DTV software upgrade starts and the step proceeds to (7).
5. If the ATV software upgrade is necessary, the following display appears and the upgrade starts.
When the status bar reaches 100%, the ATV upgrade is complete. Then the system restarts from the ATV mode. The step proceeds to (6).
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LC-37D44E/S/RU-BK/GY
6. The message, “SYSTEM SOFTWARE UPDATE IN PROGRESS. ...” appears again and the DTV software upgrade starts. Then the step proceeds
to (7).
7. After a short time, the message, “Congratulations! ...” appears. The upgrade is complete.
(Note: You cannot downgrade the ATV software but can downgrade the DTV software.)
[3] Entering and exiting the adjustment process mode
1) Unplug the AC power cord of running TV set to force off the power.
2) While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power.
The letter appears on the screen.
3) Next, hold down the “VOL (-)” and “P()” keys on the set at once.
Multiple lines of orange characters appearing on the screen indicate that the set is now in the adjustment Process mode.
If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.
4) To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off
with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
Caution: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode.
If the settings are tampered with in this mode, unrecoverable system damage may result.
[4] Remote controller key operation and description of display in adjustment process mode.
1. key operation
Remote controller keyMain unit keyFunction
P ( /)
(+ / –) (+ / –)
Cursor (/)
Cursor (/)
Input button on remote
controller
OK——————Executing a function
* Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.
P ( /)Moving an item (line) by one (UP/DOWN)
Changing a selected line setting (+1/-1)
——————Turning a page (PREVIOUS/NEXT)
——————Changing a selected line setting (+10/-10)
1Main VersionLEW07 01XX(XX/XX0/XX) Main microprocessor version
2Dev VersionXXDTV microprocessor version
3Dev Loader VersionXXDTV microprocessor-Loader version
4Pic VersionxxxxxxPic MICON version
5TEMP SENSORxxxxxx
6NORMAL STANDBY CAUSE RC_STANDBY
7ERROR STANDBY CAUSE[1] 00H 00MError standby cause Total operating time before error
[2] 00H 00M
[3] 00H 00M
[4] 00H 00M
[5] 00H 00M
2/11[INIT]
1Factory Init[EURO/RUSSIA/SWEDEN]Initialization to factory settings execution
2Inch SettingXXInch present setting
3Public ModeOFF/ONHOTEL MODE flag setting
4Center AcutimexxH xxMMain operating hours
5RESETOFF/ONMain operating hours reset
6Backlight AcutimexxH xxMBacklight operating hours
7RESETOFF/ONBacklight operating hours reset
8Picture Read Pos X0-xxxx-axis setting of picture data
9Picture Read Pos Y0-xxxy-axis setting of picture data
10Picture ReadON/OFFStart/stop of picture data
3/11[PAL.SECAM.N358]
1RF-AGC ADJENTERRF-AGC auto adjustment execution
2PAL+TUNER ADJENTERPAL TUNER auto adjustment execution
3PAL ADJENTERPAL auto adjustment execution
4TUNER ADJENTERTUNER auto adjustment execution
5CONTRAST SD32PAL contrast adjustment
6SECAM CB OFFSET1SECAM offset adjustment
7SECAM CR OFFSET1SECAM offset adjustment
8TUNER A DAC32TUNER DAC adjustment
9RF AGC16RF AGC adjustment
4/11[COMP 15K]
1COMP 15K ADJENTERCOMP15K auto adjustment execution
2COMP 15K CONTRAST40Contrast adjustment
5/11[HDTV]
1HDTV CONTRAST41HDTV Contrast adjustment
6/11[SMPTE]
1RF-AGC ADJENTERRF-AGC auto adjustment execution
2PAL-AGC ADJENTERPAL AGC auto adjustment execution
3PAL ADJENTERPAL auto adjustment execution
4TUNER ADJENTERTUNER auto adjustment execution
5CONTRAST SD30PAL contrast adjustment
6SECAM CB OFFSET1SECAM offset adjustment
7SECAM CR OFFSET1SECAM offset adjustment
8TUNER A DAC36TUNER DAC adjustment
9RF AGC16RF AGC adjustment
7/11[M GAMMA INFO]
1M GAMMA IN 1160W/B adjustment, gradation 1 input setting
2M GAMMA IN 2320W/B adjustment, gradation 2 input setting
3M GAMMA IN 3480W/B adjustment, gradation 3 input setting
4M GAMMA IN 4640W/B adjustment, gradation 4 input setting
5M GAMMA IN 5800W/B adjustment, gradation 5 input setting
6M GAMMA IN 6960W/B adjustment, gradation 6 input setting
7M GAMMA WRITEOFF/ONEEP writing of adjustment values
8M GAMMA RESETOFF/ONInitialization of adjustment values
1M GAMMA R 10W/B adjustment, gradation 1R adjustment value
2M GAMMA G 10W/B adjustment, gradation 1G adjustment value
3M GAMMA B 10W/B adjustment, gradation 1B adjustment value
4M GAMMA R 20W/B adjustment, gradation 2R adjustment value
5M GAMMA G 20W/B adjustment, gradation 2G adjustment value
6M GAMMA B 20W/B adjustment, gradation 2B adjustment value
7M GAMMA R 30W/B adjustment, gradation 3R adjustment value
8M GAMMA G 30W/B adjustment, gradation 3G adjustment value
9M GAMMA B 30W/B adjustment, gradation 3B adjustment value
10M GAMMA WRITEOFF/ONEEP writing of adjustment values
9/11[M GAMMA 4-6]
1M GAMMA R 40W/B adjustment, gradation 4R adjustment value
2M GAMMA G 40W/B adjustment, gradation 4G adjustment value
3M GAMMA B 40W/B adjustment, gradation 4B adjustment value
4M GAMMA R 50W/B adjustment, gradation 5R adjustment value
5M GAMMA G 50W/B adjustment, gradation 5G adjustment value
6M GAMMA B 50W/B adjustment, gradation 5B adjustment value
7M GAMMA R 60W/B adjustment, gradation 6R adjustment value
8M GAMMA G 60W/B adjustment, gradation 6G adjustment value
9M GAMMA B 60W/B adjustment, gradation 6B adjustment value
10M GAMMA WRITEOFF/ONEEP writing of adjustment values
10/11[ETC]
1EEP CLEAROFF/ONClear of all adjustment value
2EEP CLEAR BOFF/ONClear of adjustment value of B mode
3STANDBYCAUSE RESETOFF/ONReset of STANDBY CAUSE
4AUTO INSTALLATION SW0/11: * * * 0: * * *
5OPTION 0
6COUNTRYAUTO/EURO/UKDestination setting
7L ERR RESET0LAMP ERR RESET Initializatio of L_ERR
8L ERR STOP0/1LAMP ERR Inhibit L_LRR detection
9DTV CLRENTERClear of DTV setting
10I2C-OFFENTERI2C DATA execution
11/11[COM-BIAS]
1VCOM ADJ63
2TEST PATTERN0
[6] Special features
* ERROR STANDBY CAUSE (Page 1/11)
The total time when the unit enters the standby due to operational error and cause of error are recorded on EEPROM as much as possible.
The values can be used to locate the fault for repair.
* EEP CLEAR (Page10/11)
Clear of process adjustment EEP value.
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[7] Video signal adjustment procedure
* The adjustment process mode menu is listed in Section 5.
1. Signal check
1. Signal generator level adjustment check (Adjustment to the specified level)
• Composite signal PAL: 0.7Vp-p ±0.02Vp-p (Pedestal to white level)
• 15K component signal (50 Hz): Y level 0.7Vp-p ±0.02Vp-p (Pedestal to white level)
2. Entering the adjustment process mode
1. Enter the adjustment process mode according to Section 3.
• Feed the COMPONENT 15K 100% full field colour bar signal
(100% colour saturation) to EXT5 COMPONENT IN.
2Auto adjustment
performance
Adjustment process
Page4
100% white
Bring the cursor on [COMP15K ADJ] and press [OK]
[***OK***] appears when finished.
Black
[8] White Balance Adjustment
Adjustment gradation values (IN) appear on page 7/11 of process adjustment, and adjustment initial values (offset value) appear on pages 8/11 and
9/11. For white balance adjustment, adjust the offset values on pages 8/11 and 9/11.
[Condition of the unit for inspection] Modulated light: MAX (+8)
[Adjustment reference device] Minolta CA-210
[Adjustment]
Check that the values on page 7/11 of process adjustment are set as below. If not, change them accordingly.
M GAMMA IN 1160M GAMMA IN 2320
M GAMMA IN 3480M GAMMA IN 4640
M GAMMA IN 5800M GAMMA IN 6960
1) Display the current adjustment status at point 6. (Page 7/11 of process adjustment)
The display for checking the adjustment status is toggled by pressing the “6” button on the remote control.
3) Change M GAMMA R6/M GAMMA B6 (Adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R and B must be fixed.)
4) If G is changed in step 3), change the values of M GAMMA G1-M GAMMA G5 on pages 8/11 and 9/11 of process adjustment as follows. When not
changed, go to step5).
Offset value of M GAMMA G1 = (Offset value of M GAMMA G6) * (160/960)
Offset value of M GAMMA G2 = (Offset value of M GAMMA G6) * (320/960)
Offset value of M GAMMA G3 = (Offset value of M GAMMA G6) * (480/960)
Offset value of M GAMMA G4 = (Offset value of M GAMMA G6) * (640/960)
Offset value of M GAMMA G5 = (Offset value of M GAMMA G6) * (800/960)
5) Display the adjustment status of the current point 5. (Each time the “5” button on the remote control is pressed, the adjustment status check display is toggled.)
Change M GAMMA R5/M GAMMA B5 (adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
1) Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system, as well as the RS-232C cross cable.
2) Start the unit with the RS-232C cable connected.
3) Start the terminal software. (The freeware readily available on the Internet will do.)
4) Make the following settings.
Baud rate9,600 bps
Data LENGTH8 bit
Parity bitNone
Stop bit1 bit
Flow controlNone
5) If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key.
6) After the settings are done correctly, it is possible to make an adjustment by typing in the command shown in the table below and pressing the
"ENTER" key on the keyboard.
7) Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed. If "ERR" is shown, retry to enter the command.
8) Send the process mode switching command to switch from the RS232C operation mode to the process mode.
KRSW0001: "ERR" is returned.
KKT10037: When "OK" is returned, the process mode becomes active. When "ERR", start over from KRSW0001.
9) Send each adjustment command.
RS-232C command list
CommandFunctionRemarks
KYOF0000Remote control disabled
OSDS0001OSD display inhibited
SBSL0016Light control level MAX
MSET0001Background adjustment start
MSET0004Initialization of adjustment value
LEV60928Gradation 6 (928-gradation adjustment)
MG6G ****Adjustment of G of gradation 60000 ~4095
MG6R ****Adjustment of R of gradation 60000 ~ 4095
MG6B ****Adjustment of B of gradation 60000 ~ 4095
LEV50800Gradation 5 (800-gradation adjustment)
MG5G ****Input of G of gradation 5Calculated value
MG5R ****Input of R of gradation 50000 ~4095
MG5B ****Input of B of gradation 50000 ~ 4095
LEV40656Gradation 4 (656-gradation adjustment)
MG4G ****Input of G of 4Calculated value
MG4R ****Input of R of 40000 ~4095
MG4B ****Input of B of 40000 ~ 4095
LEV30528Gradation 3 (528-gradation adjustment)
MG3G ****Input of G of 3Calculated value
MG3R****Input of R of 30000 ~ 4095
MG3B ****Input of B of 30000 ~ 4095
LEV20352Gradation 2 (352-gradation adjustment)
MG2G ****Input of G of 2Calculated value
MG2R ****Input of R of 20000 ~ 4095
MG2B ****Input of B of 20000 ~ 4095
LEV10184Gradation 1(176-gradation adjustment)
MG1G ****Input of G of 1Calculated value
MG1R ****Input of R of 10000 ~ 4095
MG1B ****Input of B of 10000 ~ 4095
MSET0003Writing of adjustment value
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[10] Initialization to factory settings
LC-37D44E/S/RU-BK/GY
Caution: When the factory settings have been made, all user setting data, including the channel settings, are initialized.
After adjustments, exit the adjustment process mode.
To exit the adjustment process mode, unplug the AC power cord from the outlet to forcibly turn off the power.
When the power is turned off with the remote control, unplug the AC power cord and plug it back in (wait approximately 10 seconds before plugging
in the AC power cord)
(The adjustments done in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings.
• Use the R/C key to select a destination [EURO/RUSSIA/
SWEDEN]. And, press the [OK] key.
• “EXECUTING...” appears and initialization starts.
• After a while, “*** OK ***” appears and the setting is complete.
NOTE: Never turn the power off during initialization.
When performing factory settings (while displaying page 2 of adjustment
process), confirm that the item “Inch Setting” or the panel size displayed
in the upper right corner corresponds to each panel size.
The following settings will be back to their factory ones.
1. User settings
2. Channel data (e.g. broadcast frequencies)
3. Maker option setting
4. Password data
[11] Lamp error detection
1. Function description
This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety when the lamp or lamp circuit is abnormal
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the following occur.
1- The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front side of TV turns from green to red.)
2 - If the situation “1” happens 5 times sequentially, the power is turned on (relay is turned ON).
However, the backlight is not turned on, and then the relay is turned OFF after 5 to 6 seconds. (The power LED turns from green to red.)
2. Countermeasures
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment process with the power LED red. Entering the
adjustment process turns OFF the error detection and turns ON TV. This enables the operation check to detect errors in the lamp or lamp circuit
Check whether “L ERROR RESET” on point 7, page 10/11 of the adjustment process is 1 or more. If it is 1 or more, it indicates the lamp error detection was executed. After confirming that the lamp or lamp circuit is normal, reset the lamp error counter pushing “OK” in the R/C. After resetting
counter the label “***OK***” appears on Screen.
3. Reset standby cause error list
After confirming that the lamp error counter has been erased, select “STAND BY CAUSE RESET” on point 3, page 10/11 of the adjustment process
and select ON using the right cursor. For execute press “OK” in the R/C and the label “***OK***” appears on Screen.
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[12] Public Mode (Hotel Mode)
1. How to Enter in the Public Mode (Hotel Mode).
Turn on the power and enter in the Adjustment Process mode as usual.
In the [INIT], Page 2/11 of Service, turns ON the Public Mode option.
Turn off TV by pressing Main Power switch.
While pressing “VOL+” and “INPUT” keys at the same time, press Main Power switch for more than 2 seconds.
Then, when you are asked for the password, enter “027”.
After this sequence the TV will turn on showing the Public Mode setting screen as follows:
Is possible to select each item of function by pressing cursor UP/DOWN keys on the remote control or CH()() keys on the LCD TV. (Except
DTV)
The setting position of each item of functions is made by pressing cursor RIGHT/LEFT keys on the remote control or VOL (+) / (-) keys on the LCD
TV.
Select EXECUTE position after you set all function, and press cursor RIGHT/LEFT keys on the remote control or VOL (+) / (-) keys on the LCD TV for
confirmation.
2. Public Mode Settings.
1. POWER ON FIXED [VARIABLE FIXED]
When it is set to “FIXED” the TV is impossible to be switch off by Main Switch or Remote Control.
2. MAXIMUM VOLUME [0 60]
Is possible to set the maximum volume at limited level.
3. VOLUME FIXED [VARIABLE FIXED]
Is possible to fix the sound volume at limited level.
When “FIXED” is selected the sound volume before limited is fixed.
4. VOLUME FIXED LEVEL [0 60]
If “FIXED” has been selected, is possible to set a fixed volume at the level that is chosen.
5. RC BUTTON [RESPOND NO RESPOND]
If “NO RESPOND” is selected, the remote control keys are inoperative.
6. PANEL BUTTON [RESPOND NO RESPOND]
If “NO RESPOND” has been selected, the set’s keys remain deactivated (Except POWER key).
7. MENU BUTTON [RESPOND NO RESPOND]
If “NO RESPOND” has been selected, “MENU” key, of remote control, is inoperative.
8. ON SCREEN DISPLAY [YES NO]
If “NO” has been selected, the On Screen Display does not appear.
When any other item than “NORMAL” has been selected, the sets will start in a selected input mode at the next power-on.
10.INPUT MODE FIXED [VARIABLE → FIXED]
“FIXED” has been selected, any channels and input modes other than those selected at the start mode cannot be picked up.
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11.RESET
Cancel all Public Mode settings. (It returns to the factory settings)
12.EXECUTE
Select this item, and press cursor RIGHT / LEFT keys on the remote control or VOL (+) / (-) keys on the LCD TV for confirmation the functions settings.
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LC37D44E-BK
CHAPTER 4. TROUBLESHOOTING TABLE
Service Manual
[1] TROUBLESHOOTING TABLE
The sound is not emitted from the speaker though the picture has come out.
No sound output in all modes.?
Is the audio signal output of pins (28/L) and (27/R) of
IC3001 (MAIN_MICON) normal?
YES
Is audio signal input to pin(5/L), pin(9/R) of IC2701(AMP)?
YES
Is MUTE circuit [MUTE_SP_LINE, RESET_N_LINE] normal?
YES
Is the audio signal output of pins (3, 4) (L-ch) and (2, 1)
(R-ch) of P2701(AOUDIO-CONNECTOR) normal?
YES
Check Speaker (right and left) and wire harness.
No sound (during the reception of TV(ANALOG) broadcasting)
NO
NO
NO
NO
Check IC3001 and its peripheral circuits.
Check the line between IC3001 and IC2701.
Check the MUTE_SP_LINE and RESET_N_LINE.
(Q2701, etc.)
Check IC2701 and its peripheral circuits.
Does not the sound go out though the picture has come out when UHF/VHF is received?
Is the SIF signal output from pin (4) of TUNER (TU201)?
YES
Is the SIF signal sent to pins (31) of IC3001
(MAIN_MICON)?
YES
Refer to “No sound output in all modes”.
NO
NO
Check the tuner and its peripheral circuits.
Replace as required.
Check the line between TU201 and IC3001.
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No sound (during the reception of TV(DIGITAL) broadcasting)
Does not the sound go out though the picture has come out when DTV is received?
LC-37D44E/S/RU-BK/GY
Is the audio signal output from PIN(24,25)/ LETFT_M/P,
PIN(28,29)/ RIGH_M/P of IC4001(SETTOP_BOX_DECODER).
YES
Is the audio signal input to PIN(6,5)/ LETFT_M/P, (2,3)/
RIGH_M/P of IC4005(OP-AMP)?
YES
Is the audio signal sent from PIN(7)/ AIN1L, (1)/AIN1R of
IC4005 to PIN(10), PIN(9) of IC3001 (MAIN_MICON)?
Refer to “No sound output in all modes”.
Does not the sound of the audio signal input to EXT1(SCART1) go out?
Does not the sound of the audio signal input to EXT2(SCART2) go out?
YES
No sound from external input devices (1)
NO
NO
NO
Check IC4001 and its peripheral circuits.
Check the line between IC4001 and IC4005.
Check the line between IC4005 and IC3001.
EXT1
Is the audio signal properly sent to pins (6) (AIN3_L) and
(2) (AIN3_R) of SCART1(SC1102)?
EXT2
Is the audio signal properly sent to pins (6) (AIN2_L) and
(2) (AIN2_R) of SCART2(SC1101)?
YES
EXT1
Is the audio signal properly sent to pins (14) (AIN3_L) and
(13) (AIN3_R) of IC3001(MAIN_MICON)?
EXT2
Is the audio signal properly sent to pins (12) (AIN2_L) and
(11) (AIN2_R) of IC3001(MAIN_MICON)?
YES
Refer to “No sound output in all modes”.
NO
NO
NO
NO
Check the setting of an external input device that connects of
SC1102.
Check the setting of an external input device that connects of
SC1101.
Check the line between SC1102 and IC3001.
Check the line between SC1101 and IC3001.
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No sound from external input devices (2)
Does not the sound of the audio signal input to EXT3 go out?
MINI AV UNIT:
Is audio signal output from pin(5/IN3L), (4/IN3R) of input
terminal J1002 to pin(8), (6) of connector SC1001?
MAIN UNIT:YES
Is audio signal input to pin(8/IN3L), (6/IN3R) of connector
P1001?
YES
Is audio signal input to pin(1/IN3L), (6/IN3R) of IC1301
(AUDIO_SELECTOR)?
YES
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?
NO
NO
NO
NO
Check connection of between from J1002 to SC1001 and the external input device.
Check the connector(SC1001/ P1001).
Check the line between P1001 and IC1301.
Check IC1301 and its peripheral circuits.
YES
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
YES NO
Refer to “No sound output in all modes”Check the line between IC1301 and IC3001.
No sound from external input devices (3)
Does not the sound of the audio signal input to EXT4 go
out?
Is audio signal sent from pin(2/L) and (3/R) of input terminal J1301 to pin(5) and (8) of IC1301
(AUDIO_SELECTOR)?
YES
Does not the sound of the audio signal input to EXT6(Analog) go
out?
Whether "Analog" has selected it in the Audio setup of the HDMI
option is checked.
Is audio signal sent from pin(2/L) and (3/R) of input terminal J1302 to
pin(3) and (7) of IC1301(AUDIO_SELECTOR)?
NO NO
Check the connection between J1301 and the peripheral
circuit, the external input devices.
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?
Check the connection between J1302 and the peripheral circuit, the
external input devices.
NO
Check IC1301 and its peripheral circuits.
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YES
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
YES NO
Refer to “No sound output in all modes”Check the line between IC1301 and IC3001.
No sound from external input devices (4)
Does not the sound of the audio signal input to EXT5 go out?
LC-37D44E/S/RU-BK/GY
Is audio signal output from pin(2/COMP_AL), (4/
COMP_AR) of input terminal J1303 to pin(13), (9) of
IC1301 (AUDIO_SELECTOR)?
YES
Is the audio signal sent to pin (15/AIN4L), (11/AIN4R) of
IC1301?
YES
Is audio signal input from pin (15/AIN4L), (11/AIN4R) of IC1301 to pin (16, 15) of IC3001 (MAIN_MICON)?
YES NO
Refer to “No sound output in all modes”Check the line between IC1301 and IC3001.
No sound from external input devices (5)
Does not the sound of the audio signal input to EXT6/7(HDMI) go out?
Is picture of the signal input from EXT6/7 displayed?
NO
NO
NO
Check connection of between from J1303 to IC1301 and the external
input device.
Check IC1301 and its peripheral circuits.
Refer to “Does not the picture of the HDMI signal input to EXT6/7 go
out?”.
YES
Is the HDMI_SCK/ WS/ SD0 audio signal output from
pin(86), (85), (84) of IC1951 (HDMI RECEIVER) to pin(39),
(40), (38) of IC3001 (MAIN_MICON)?
YES
Refer to “No sound output in all modes”.
NO
Check the line between IC1951 and IC3001, and their peripheral circuits.
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No audio signal output from SCART1 terminal.
The audio signal is not output (1)
Is audio signal sent to pins (3/L-ch) and (1/R-ch) of
SCART1(SC1102)?
NO
Is S-MUTE-LINE [pin(62) of IC2302(SUB_MICON)] at H?
NO
Is audio signal sent to pins (24/L-ch) and (23/R-ch) of
IC3001(MAIN_MICON)?
NO
Check IC3001 and its peripheral circuits.
No audio signal output from SCART2 terminal.
Is audio signal sent to pins (3/L-ch) and (1/R-ch) of
SCART2(SC1101)?
YES
YES
YES
The audio signal is not output (2)
YES
Check the connection to SCART1 and external devices.
Check the peripheral circuits of IC2302 and S-MUTE_LINE.
(Q1101, etc.)
Check the line between SC1102 and IC3001.
(Q1106, Q1105, etc.)
Check the connection to SCART2 and external devices.
NO
Is S2-MUTE-LINE [pin(63) of IC2302(SUB_MICON)] at H?
NO
Is audio signal sent to pins (22/L-ch) and (21/R-ch) of
IC3001(MAIN_MICON)?
NO
Check IC3001 and its peripheral circuits.
YES
YES
Check the peripheral circuits of IC2302 and S2-MUTE_LINE.
(Q1102, etc.)
Check the line between SC1101 and IC3001.
(Q1108, Q1107, etc.)
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NO
No audio signal output from AUDIO_OUTPUT terminal.
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The audio signal is not output (3)
Is audio signal output to pin(2/L-ch), (4/R-ch) of audio output terminal J1304?
NO
Is S-MUTE-LINE [pin(62) of IC2302(SUB_MICON)] at H?
NO
Is audio signal sent to pins (22/L-ch) and (21/R-ch) of
IC3001(MAIN_MICON)?
NO
Check IC3001 and its peripheral circuits.
No sound from HEDPHONE_OUTPUT terminal.
Is the HP_PLUG signal input into pin (208) of
MAIN_UNIT's IC3001 (MAIN_MICON) from pin (6) of a
headphone terminal (J1003)?
YES
YES
YES
The audio signal is not output (6)
NO
Check the connection to J1304 and external devices.
Check the peripheral circuits of IC2302 and S-MUTE_LINE.
(Q1303, etc.)
Check the line between J1304 and IC3001.
(Q1302, Q1301, etc.)
Check the line between J1003 and IC3001.
(SC1001/P1001, IC3001, etc.)
YES
Is the audio signal output to pin(2/L-ch) pin(3/R-ch) of
headphone terminal J1003?
NO
Is the audio signal input into pin (3) and (1) of connector
SC1001 from pin(3/L-ch),(1/R-ch) of connector P1001?
NO
Is HP-MUTE-LINE [pin(40) of IC2302(SUB_MICON)] at
H?
NO
Is audio signal sent to pins (26/L-ch) and (25/R-ch) of
IC3001(MAIN_MICON)?
NO
Check IC3001 and its peripheral circuits.
YES
YES
YES
YES
Check HEAD-PHONE (J1003) or peripheral circuits.
Check the line between P1001 and J1003.
(SC1001/P1001, etc.)
Check the peripheral circuits of IC2302 and HP-MUTE_LINE.
(Q1001, etc.)
Check the line between P1001 and IC3001.
(IC1102, etc.)
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No picture on the display (1)
The picture doesn't appear in all modes.
Is the LVDS signal output from IC3001
(MAIN_MICON)?
LVDS0_P/N(140/141), LVDS1_P/N(137/138),
LVDS2_P/N(134/135), LVDS3_P/N(128/129),
LVDS4_P/N(125/126), LVDS_CP/CN(131/132).
YES
Is the LVDS signal input to IC8103 (LCD_CONTROL)?
A0+/-(165/164), A1+/-(167/166), A2+/-(169/168), A3+/(189/188), A4+/-(191/190), ACK+/-(187/186)
YES
Is the control signal of LCD controller normal?
YES
Is VCC_3.3V, VCC_2.5V or VCC_1.5V supplied to
IC8103?
YES
Are the video signals BR/BG/BB (0_P/M-3_P/M), FR/
FG/FB (0_P/M-3_M/P) and the CLK signals (BCLK_P/
M, FCLK_P/M) output from IC8103?
NO
Check IC3001 and its peripheral control circuits.
NO
NOCheck the control signal R/L_LINE, U/D_OUT_LINE,
NO
NO
Check the line between IC3001 and IC8103.
FRAME_LINE, BANK_SEL_LINE, TEMP1/2/3_LINE,
QS_EN_LINE, etc.
Check if IC8402(MULTI_CHANNEL_SYSTEM_POWER_SUPPLY)
and the peripheral power supply circuit are normal.
Check IC8103 and its peripheral circuits.
YES
Are BR/BG/BB (0_P/M-3_P/M), BCLK (P/M) input to
connector SC8201 and FR/FG/FB (0_P/M-3_P/M),
FCLK (P/M) input to connector SC8202?
YES
Are the gradation signals (VH/VL_247, 191, 159, 63,
31, 0) normally sent from IC8201 (GLAY_LEVEL
_GENERATION) to SC8201/SC8202?
YES
Check the connectors SC8201/SC8202 and LCD panel.
NO
Check the line between IC8103 and SC8201/SC8202.
NOCheck IC8201 and that the communication between its peripheral
circuits and IC8103 is normal. (Each line of DAC_CLK/DATA/
LATCH)
4 – 7
Page 47
Does not the picture come out when VHF/UHF is received?
LC-37D44E/S/RU-BK/GY
No picture on the display (2)
Is the video signal(VIN1) output from pin (6) of TUNER
(TU201)?
YES
Is the video signal(VIN1) sent to pins (191) of IC3001
(MAIN_MICON)?
YES
Refer to “The picture doesn't appear in all modes.”
Does not the picture come out when DTV is received?
Is the voltage of regulation for a TUNER circuit and the
power supply terminal of IC207 (COFDM) supplied?
(Refer to the circuit diagram)
YES
Is IF signal output from pin (16),(17) of TUNER(TU201)
to pin(10),(11) of IC207(COFDM)?
NO
NO
No picture on the display (3)
NO
NO
Check whether I2C is normally accessed between named TU201
and IC3001(MAIN_MICON).
Check the line between TU201 and IC3001.
Each power supply circuit is checked.
YES
Similarly, is communication control carried out between
pin (8),(9) of TU201, and pin (20),(21)of IC207?
YES
Does X201(27MHz) oscillate?
YES
Is the MPEG data (FESCL, FESDA, FEVALID, FESTROUT) output from IC207 to IC4001?
YES
Are the video signals (DTV_R/G/B, DTV_CVBS) output
from PIN(15,16,17), PIN(18) of IC4001?
YES
Are the video signals (DTV_R/G/B, DTV_CVBS) input
to PIN(181,180,179), PIN(184) of IC3001
(MAIN_MICON)?
NO
NO
NO
NO
NO
Check the tuner, IC207 and their peripheral circuits.
Replace as required.
Check X201 and its peripheral circuits.
Check if the line between IC207 and IC4001 and the control signals
FERROR_LINE and FERESET_LEINE are normal. (IC4402, etc.)
Check if IC4001, IC4201(SDRAM), IC4251(FLASH_MEMORY) and
IC4202(B+2.5V_REG) are normal.
Check the line between IC4001 and IC3001.
(IC1401, IC1001, Q1031, etc.)
YES
Refer to “The picture doesn't appear in all modes.”
4 – 8
Page 48
LC-37D44E/S/RU-BK/GY
[External input EXT1,EXT2] No picture on the display (4)
Does not the picture of the CVBS signal input to EXT1 go out?
Does not the picture of the CVBS signal input to EXT2 go out?
<EXT1>
Is CVBS signal sent to pin (20) of SCART1 (SC1102)?
<EXT2>NOCheck the setting of an external input device that connects of SC1101.
Is CVBS signal sent to pin (20) of SCART2 (SC1101)?
YES
<EXT1>
Is CVBS signal sent to pin (6) of IC1502(SW.)?
<EXT2>
Is CVBS signal sent to pin (4) of IC1502(SW.)?
YES
Is CVBS signal output to pin(190) of
IC3001(MAIN_MICON) from pin(2) of IC1502?
YES
Refer to “The picture doesn't appear in all modes.”
[External input EXT1,EXT2] No picture on the display (5)
Does not the picture of the R/G/B video signal input to EXT1 go out?
Does not the picture of the R/G/B video signal input to EXT2 go out?
NOCheck the setting of an external input device that connects of SC1102.
NOCheck the line between SC1102 and IC1502
NOCheck the line between SC1101 and IC1502.
NOCheck the line between IC1502 and IC3001.
(SCART12_LINE, etc.)
<EXT1>
Is RGB1 signal sent to pins (15)/R1, (11)/G1 and (7)/B1
of SCART1(SC1102)?
<EXT2>
Is RGB2 signal sent to pins (15)/R2, (11)/G2 and (7)/B2
of SCART2(SC1101)?
YES
<EXT1>
Is RGB1 signal sent to pins (187)/R1, (175)/G1 and
(182)/B1 of IC3001(MAIN_MICON)?
<EXT2>
Is RGB2 signal sent to pins (178)/R2, (177)/G2 and
(176)/B2 of IC3001(MAIN_MICON)?
YES
Refer to “The picture doesn’t appear in all modes.”
NO
Check the setting of an external input device that connects of SC1102.
NO
Check the setting of an external input device that connects of SC1101.
NO
Check the line between SC1102 and IC3001.
NO
Check the line between SC1101 and IC3001.
4 – 9
Page 49
[External input EXT1,EXT2] No picture on the display (6)
Does not the picture of the Y/C video signal input to EXT1 go out?
Does not the picture of the Y/C video signal input to EXT2 go out?
LC-37D44E/S/RU-BK/GY
<EXT1>
Is Y/C video signal sent to pins (20)/Y and (15)/C of
SCART1 (SC1102)?
<EXT2>
Is Y/C video signal sent to pins (20)/Y and (15)/C of
SCART2 (SC1101)?
YES
<EXT1>
Is Y/C signal sent to pins (190)/Y, (187)/C of
IC3001(MAIN_MICON)?
<EXT2>
Is Y/C signal sent to pins (190)/Y, (178)/C of
IC3001(MAIN_MICON)?
YES
Refer to “The picture doesn’t appear in all modes.”
<When EXT3 is used for external input> No picture on the display (7)
Does not the picture of the composite video signal input to EXT3 go out?
NOCheck the setting of an external input device that connects of SC1102.
NOCheck the setting of an external input device that connects of SC1101.
NOCheck the line between SC1102 and IC3001.
NOCheck the line between SC1101 and IC3001.
(IC502, SCART12_LINE, etc.)
(IC502, SCART12_LINE, etc.)
Is CVBS signal output from pin(6) in input terminal
J1002 to pin(10) of connector SC1001?
YES
Is the CVBS signal input from pin(10) of connector
P1001 to pin(1) of IC1001(VIDEO SELECTOR)?
YES
Is CVBS signal output to pin(184) of
IC3001(MAIN_MICON) from pin(7) of IC1001?
YES
Refer to “The picture doesn't appear in all modes.”
NOCheck the line between J1002 and SC1001.
NOCheck the line between P1001 and IC1001.
(Connector SC1001/P1001, etc.)
NOCheck the line between IC1001 and IC3001.
(SV1JSW_LINE, EXT_DTV_LINE, etc.)
4 – 10
Page 50
LC-37D44E/S/RU-BK/GY
<When EXT3 is used for external input> No picture on the display (8)
Does not the picture of the Y/C video signal input to EXT3 go out?
Is Y/C signal input into pin(14), (12) of connector
SC1001 from pin(3)/Y, (4)/C of J1001?
YES
Is Y/C signal output from pin(14)/Y,(12)/C of connector
P1001?
YES
Is the Y/C video signal detection function SV1JSW sig-
nal from pin (6) of the input terminal J1001 normal?
YES
Is the SV1JSW signal input to pin(2) of IC1001
(VIDEO_SELECTOR) and pin(27) of IC2302
(SUB_MICON)?
YES
Is Y/C signal sent to pins (184), (183) of
IC3001(MAIN_MICON)?
NOCheck the line between J1001 and SC1001.
NOCheck the connector SC1001/P1001.
NOCheck J1001 or peripheral circuits.
NOCheck the between SV1JSW_LINE J1001 and IC1001/IC2302. (Con-
nector SC1001/P1001, etc.)
NOCheck the line between P1001 and IC3001.
(IC1001, EXT_DTV_LINE etc.)
YES
Refer to “The picture doesn't appear in all modes.”
<When EXT4 is used for external input> No picture on the display (9)
Does not the picture of the DVI(ANALOG) video signal input to EXT4(15pin-D-SUB terminal) go out?
Are the video signal and the synchronized signal input
from pin(1, 2, 3)/(R, G, B), (13 and 14)/(V, H) of input
terminal D-SUB (SC1201)?
YES
Is EDID data pin (6)/SCL, pin(5)/SDA of IC1201
(EEPROM) accessed, and is it read from pin (15),(12)
of a DVI terminal(SC1201)?
YES
Are the video signal and the synchronized signal input
from pin(174, 173, 172)/(R, G, B), pin(171, 47)/(H, V) of
IC3001(MAIN_MICON)?
NOCheck the connection and setup with the external DVI devices.
NOIs access possible in the re-writing or exchange of EDID data of
IC1201?
Check the circumference circuit of SC1201, IC1201.
NOCheck the line between SC1201 and IC3001.
(IC1941,etc)
NO
YES
Refer to “The picture doesn't appear in all modes.”
4 – 11
Page 51
<When EXT5 is used for external input> No picture on the display (10)
Does not the picture of the component video signal input to EXT5 go out?
LC-37D44E/S/RU-BK/GY
Is COMPONENT video signal input into pin(3)/Y, (5)/Pb,
(7)/Pr of the input terminal J1401?
YES
Is COMPONENT video signal input into pin(1)/Y, (6)/Pb,
(9)/Pr of IC1401(VIDEO_BUFFER)?
YES
Is COMPONENT signal output into pin(180), (179),
(181) of IC3001(MAIN_MICON) from pin(20)/Y, (18)/PB,
(16)/PR of IC1401?
YES
Refer to “The picture doesn't appear in all modes”
NOCheck the connection of J1401 and the external input device.
NOCheck the line between J1401 and IC1401.
NOCheck the line between IC1401 and IC3001.
4 – 12
Page 52
LC-37D44E/S/RU-BK/GY
<When EXT6/7 is used for external input> No picture on the display (11)
Does not the picture of the HDMI signal input to EXT6/7 go out?
EXT6EXT6
Is the HDMI detection function output from pin (19) of
the HDMI terminal (SC1901) normal?
EXT7EXT7
Is the HDMI detection function output from pin (19) of
the HDMI terminal (SC1921) normal?
YES
EXT6NO
Is EDID data pin (6)/SCL, pin(5)/SDA of
IC1902(EEPROM) accessed, and is it read from pin
(15),(16) of a HDMI terminal(SC1901)?
EXT7
Is EDID data pin (6)/SCL, pin(5)/SDA of
IC1922(EEPROM) accessed, and is it read from pin
(15),(16) of a HDMI terminal(SC1921)?
NO
NO
Check between SC1901and IC3001(MAIN_MICON) of pin(205).
(Q1905, etc.)
Check between SC1921 and IC3001(MAIN_MICON) of pin(203).
(Q1925, etc.)
Check the connection and setup with the external HDMI devices.
Is access possible in the re-writing or exchange of EDID data of
IC1902?
Check the circumference circuit of SC1901, IC1902 and
IC1951(HDMI_RECEIVER).
Is access possible in the re-writing or exchange of EDID data of
IC1922?
NO
NO
Check the circumference circuit of SC1921, IC1922 and
IC1951(HDMI_RECEIVER).
YES
EXT6
Is TMDS signal input into pin(59,58)/TMDS2_CLKP/N,
(63,62)/TMDS2_D0P/N, (67,66)/TMDS2_D1P/N,
(71,70)/TMDS2_D2P/N of IC1951 from SC1901?
EXT7
Is TMDS signal input into pin(40,39)/TMDS1_CLKP/N,
(44,43)/TMDS1_D0P/N, (48,47)/TMDS1_D1P/N,
(52,51)/TMDS1_D2P/N of IC1951 from SC1921?
YES
Is each signal output from DINR[0:7], DING[0:7],
DINB[0:7], pin(2,3)/HDMI_H/V, (1)/DINEN, (121)/
DINCK, of IC1951?
YES
Is each signal of DINR[0:7], DING[0:7], DINB[0:7], pin(171,47)/HDMI_H/V, (48)/DINEN, (49)/DINCK of IC3001(MAIN_MICON) input?
YESNO
Refer to “The picture doesn't appear in all modes.”
NO
NO
NO
Check the line between SC1901 and IC1951.
Check the line between SC1921 and IC1951.
Is the control signal of IC1951 and IC3001 (MAIN_MICON) normal?
(HDMI_RST, IC1941, etc.)
Check the line between IC1951 and IC3001.
(IC1941, etc.)
4 – 13
Page 53
LC-37D44E/S/RU-BK/GY
<During external connection> No picture on the monitor (1)
SCART1:
No picture appears on EXT1 - connected monitor during the tuner (U/V) reception.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device?... Set it to”CVBS”, ”Y/C” or “RGB”.
2) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
3) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is CVBS signal output into pin(19) of SC1102(SCART1)
from pin(2) of IC1102(SW)?
NO
Is CVBS signal output from PIN(195) of
IC3001(MAIN_MICON) to PIN(6) of IC1102?
NO
Is video signal (CVBS) sent to pin (195) of IC3001?YESCheck power supply of IC3001 and peripheral circuits.
NO
Is VIN1 signal output from pin(6) of TUNRE(TU201)?YESCheck the line between TU201 and IC3001.
NO
Check whether I2C is normally accessed between
TU201 and IC3001.
YESCheck the setting of an external input device that connects of SC1102.
YESCheck the line between IC1102 and SC1102.
4 – 14
Page 54
LC-37D44E/S/RU-BK/GY
<During external connection> No picture on the monitor (2)
SCART1:
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? ... Set it to “CVBS”, “Y/C” or “RGB”.
2) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
3) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is DTV_CVBS signal output from pin(2) of IC1102(SW)
to pin(19) of SC1102(SCART1)?
NO
Is DTV_CVBS signal output from PIN(195) of
IC3001(MAIN_MICON) to PIN(6) of IC1102?
NO
Is video signal (DTV_CVBS) sent to pin (184) of
IC3001?
NO
Is DTV_CVBS signal output from PIN(18) of
IC4001(SET-TOP_BOX_DECODER)?
NO
Check the IC4001 and its peripheral circuits.
YESCheck the setting of an external input device that connects of SC1102.
YESCheck the line between IC1102 and SC1102.
YESCheck power supply of IC3001 and peripheral circuits.
YESCheck the line between IC4001 and IC3001.
(IC1001, EXT_DTV_LINE, etc.)
4 – 15
Page 55
LC-37D44E/S/RU-BK/GY
<During external connection> No picture on the monitor (3)
SCART2:
No picture from EXT1 appears on EXT2-connected monitor.
NOTE: Normally, if the screen during display is sent to EXT2, no picture is sent to EXT2.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? ... Set it to “CVBS”, “Y/C” or “RGB”.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
When sent by component, etc., that signal is not sent to the monitor.
4) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is CVBS signal output into pin(19) of SC1101(SCART2)
from pin(2) of IC1101(SW)?
NO
Is CVBS signal output into pin(194) of
IC3001(MAIN_MICON) from pin(6) of IC1101?
NO
Is video signal (VIN2) from EXT1 sent to pin (190) of
IC3001 (MAIN_MICON)?
NO
Is CVBS signal sent to pin (20) of SCART1(SC1102)?YESCheck the line between SC1102 and IC3001.
NO
Check the setting of an external input device that connects of SC1102.
YESCheck the setting of an external input device that connects of SC1101.
YESCheck the line between IC1101 and SC1101.
YESCheck power supply of IC3001 and peripheral circuits.
(IC1502, SCART12_LINE, etc.)
4 – 16
Page 56
LC-37D44E/S/RU-BK/GY
<During external connection> No picture on the monitor (4)
SCART2:
No picture from EXT3 appears on EXT2- connected monitor.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? ... Set it to “CVBS”, “Y/C” or “RGB”.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
4) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is CVBS signal output into pin(19) of SC1101(SCART2)
from pin(2) of IC1101(SW)?
NO
Is CVBS signal output into pin(194) of
IC3001(MAIN_MICON) from pin(6) of IC1101?
NO
Is CVBS signal output into pin(194) of IC3001 from
pin(6) of IC1101(VIDEO_SELECTOR)?
NO
Is CVBS signal output into PIN(1) of IC1001 from
PIN(10) of connector P1001?
NO
Check the setting of an external input device that con-
nects of SC1102.
YESCheck the setting of an external input device that connects of SC1101.
YESCheck the line between IC1101 and SC1101.
YESCheck power supply of IC3001 (MAIN_MICON) and peripheral circuits.
YESCheck IC1001 and its peripheral circuits.
(SV1JSW_LINE, EXTDTV_LINE)
MINI_AV_UNIT:NO
Is the video signal output into PIN(10) of connector
SC1001 from PIN(6) of input terminal J1002?
NO
Check the setting of an external input device that connects of J1002.
YESCheck the connector SC1001/P1001.
4 – 17
Page 57
LC-37D44E/S/RU-BK/GY
5 – 1
LC37D44E-BK
Service Manual
CHAPTER 5. BLOCK DIAGRAM/OVERALL WIRING
[1] BLOCK DIAGRAM
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BLOCK DIAGRAM (1/2)
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[2] SYSTEM BLOCK DIAGRAM
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[3] OVERALL WIRING DIAGRAM
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6 – 1
LC37D44E-BK
Service Manual
CHAPTER 6. PRINTED WIRING BOARD ASSEMBLIES
[1] MAIN Unit
1
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MAIN Unit (Chip Side A)
C1118
C1501
C1119
C1502
C8456
C1503
C1504
C1310
R210
R8430
C8458
C1505
C1311
Q1501
R211
C1506
C1312
R8432
R212
C1507
C1313
R8433
R213
C1120
C1314
C1508
R8434
R214
P3081
C1121
C1315
C4001
R8435
R215
C1122
C1316
C4002
R8436
R216
C1123
C1317
C4003
R8437
R217
C1124
C1318
C4004
R8438
C1319
D1101
C1125
C4005
C8461
R8439
R219
C1126
D1102
C4006
C8462
D1103
C1127
C4007
C8463
C1128
D1104
C4008
C8464
C1129
D1105
R1101
FB1201
C4009
C1705
R1102
D1106
FB1202
D1107
R1103
FB1203
C1320
FB1204
D1108
R8440
C8468
R220
R221
C1321
D1109
VA1921
FB1205
C4201
R8441
VA1922
C4202
R222
C1322
R8442
R1107
C4203
VA1923
R223
C1323
R8443
R1108
C4204
C4010
VA1924
C1324
R8444
VA1925
C1131
R1109
C1901
C4011
C4205
D1301
C1325
C3071
R8251
R8445
P3091
C1132
VA1926
C1902
C4206
C4012
D1302
C1326
R226
C3072
R8252
C1133
C4207
C1327
VA1927
D1303
R227
C3073
R8253
D1110
C1134
C4014
C4208
C1328
VA1928
D1304
R228
R8254
C8470
R8448
C1135
D1305
D1111
C4015
Q1901
R1301
C1329
R229
R8255
R8449
C8471
D1306
C1136
D1112
C1906
Q1902
R1302
R8256
C1137
C4017
R1303
Q1903
C8473
D1114
Q1904
R1110
C1138
C4018
R1304
D1115
R1111
C4019
C1139
R1305
C4401
C1715
R1112
D1116
R1306
C4402
R1113
R1307
C1717
C4210
R1308
R230
R8450
D1501
C4211
IC1301
R1309
R8451
C1719
D1502
D1503
R1117
R233
R1118
C4020
C4214
C1140
R234
R8454
R1119
R1501
C1141
C4021
IC3051
R8455
R1502
C1142
C4022
R236
R8456
R1503
R237
C8480
R1504
C4218
C4024
R1310
C1144
R238
C1720
R1505
C4219
R1311
C1145
R239
R8459
C1146
R1312
R1506
R1313
C1147
R1507
R1120
R1314
C1148
C4410
R1508
R1315
C1149
IC1501
C4029
R4001
C1725C201
R1122
IC1502
R1316
R4002
C1726
D1702
R1317
R1123
C1727
C203
R1124
R1318
R240
R8460
C1728
D1705
R1319
R1125
C4221
P2301
FB1031
C4415
C205
C1729
R1126
R4006
C4416
P2302
C206
R1127
R4007
C4223
C4417
R8463
P2303
C207
C4224
C4030
R8464
C4419
C4225
C4031
C4226
C1922
R1706
C4033
C4227
R8467
R1320
C4034
R1321
C4035
C4229
Q1921
C1155
R8469
IC1701
C1731
R1322
C1156
C4036
Q1922
D1902
IC1702
C4037
Q1923
D1903
R1323
R1130
C4038
Q1924
R1324
C4420
R1131
C4039
R1325
C4421
C211
R1132
R1326
C212
R1327
C213
C4230
R1134
R1328
R8470
R1329
C4231
R1905
R1135
C215
R8471
R1711
R1136
C4232IC4202
R1906
C216
R3076
R1712
R8472
R1137
R4017
C4233
C217
R8473
R1138
C4040
C1161
IC1901
R1139
C4041
C219
C1162
IC1902
C4043
R1330
R4405
C1741
P2701
C1742
C1743
R1140
C1744
C4049
R4021
R1141
R3081
R1142R1143
C223
R1144
R1145
D1725
R1146
C2302
R8482
R4027
R1147
C227
R1148
C228
R8484
C2304
R1149
C229
C2305
C1941
C4052
R1726
R8486
C4053
R8487
C2307
R1727
C2308
L1031
R8489
C1751
Q2305
C1752
R4417
C1753
R4030
C4058
IC4410
C1754
C4059
C1755
IC1725
R1922
C232
C1756
IC1726
R1923
C233
R4034
R1924
C234
C1758
R4035
C4251
R1925
C235
R1731
D1735
R4036
C4252
C236
R4037
C4253
C2313
C4060
C4254
R4038
C238
Q4251
R4039
C4255
IC1921
C2315
C4062
IC1922
C4257
C4063
R4423
C1953
R8498
C4064
C4258
R4424
C1760
C2318
C2319
C2701
R8499
C1761
R4426
C1762
C2702
C1763
C2703
R4040
C240
C2704
C1764
R4041
R4235
IC1735
C1765
C2705
Q2701
Q2702
C2706
C243
C2707
Q2703
C2320
C2708
C245
R1741
C2709
P8101
C2321
D1745
R4046
C246
R1742
R4047
C247
R4430
FL1101
R4431
C249
FL1102
R4432
FL1103
FL1104
R4240
C2710
FL1105
R4435
R4241
C2711
FL1106
R4242
R4436
C2712
FL1107
R4243
R4437
C2713
R2303
FL1108
R4244
C2714
R2304
R4245
FL1109
C2715
IC1745
R4246
C252
C2716
C253
C2717
C254
C2718
C2719
D1755
R1751
IC2302
D1756
C256
R1752
IC2303
R1753
C257
FL1110
C258
R4441
IC1941
C1971
R1756
C1972
C1973
R1757
R1758
C2720
C1974
R4445
C2721
R2312
C2722
R4447
C2723
C1977
C2724
C2725
IC1755
R1951
D2701
D2702
C2726
R1952
IC1756
D202
R2317
C2727
D2703
R1953 R1954
D2704
C2728
D2705
R1955
C8101
C2729
D2706
R1956
C8102
R1957
IC1951
R1959
R2706
R2707
C2730
R2708
IC2701
C2731
R2709
R4262
C2732
R4263
C2733
R4264
R2324
R1960
C2734
C271
C2735
R1962
C2736
R4267
R1963
R2327
C2737
R2710
R1964
R4268
C2738
R1965
R2711
C2739
R2712
R1966
R1967
R2713
R2714
R1968
R2715
R1969
R2716
C1993
R2717
C2740
C1995
C2741
R4272
R1970
R1971
L2601
IC201
L2602
R2336
R1973
IC203
R2337
L2603
L2604
L2605
R2721
IC206
L2606
IC207
R2723
D8101
R2728
R2729
R8104
R8106
R8108
R2730
R2731
R2732
C8132
IC8102
IC8103
C8135
LUG3001
C8136
LUG3002
LUG3003
LUG3004
R8110
LUG3005
LUG3006
R8112
R8114
R8115
R8116
R8501
SC8201
R8502
C8142
SC8202
R8504
R8505
R8507
R8508
R8121
R8122
R8124
C1005
C1006
R8126
C1007
C1008
R8128
C1009
C1201
C1202
C1203
C1204
C1010
R8130
C1011
R8131
C1012
R8132
R8133
R8134
L8401
R8135
L8402
R8136
C1017
R8137
L8403
C1018
C1019
C1403
C1405
X3051
C1407
C1409
R8142
R8143
R8145
R8146
R8147
C1410
R8148
FB1101
C1411
R8149
FB1102
FB1103
C1413
FB1104
C1414
FB1105
C1415
FB1106
R1006
C1416
FB1107
C1417
FB1108
D1201
FB1109
IC1001
C1031
D1202
C1032
C1802
D1203
C1033
D1204
C1034
D1205
R1201
FB1301
Q1031
C1035
Q1801
D1206
R1202
FB1302
R1203
D1207
FB1303
D1208
R1204
FB1110
FB1304
R1010
FB1305
FB1111
R1205
D1209
R1011
FB1306
FB1112
R1206
R1207
R1208
R1209
IC1201
FB1309
R1017
FB1501
R1402
FB1502
FB1503
R1403
R1210
R1404
FB4001
IC1401
FL8101
FB4002
FB4003
FB1701
FB1702
LUG1701
LUG1702
LUG1703
LUG1704
FB4201
D1801
LUG1705
LUG1706
FB4202
D1802
D1803
D1804
R1031
D1805
R1801
R1032
R1802
R1033
R1803
R1034
R1035
R1036
FB4401
FB4402
C2003
FB4403
SC1901
L1701
SC4401
C2019
X2301
C2020
FB1735
X1951
SC1921
FB1745
C2610
FB1941
FL1201
FL1202
FL1203
FB2310
FB4251
FL1401
L1735
FL1402
FL1403
Q203
IC2602
C8201
L1745
C8202
C8203
C8204
C8205
C8206
R2612R2613
C8207
C8208
R2614
L201
C8209
R2615
C8402
L207
C8210
C8211
C8406
C8212
Q8403
C8213
C8407
C8214
C8408
Q8405
C8215
C8216
C8217
C8218
Q8408
C8219
C8410
C8411
L2701L2702
C8412
FB8103
L2703
C8413
L2704
C8414
C8415
Q8411
FB8105
C8222
C8416
Q8412
Q8413
C8417
C8223
C8418
C8224
Q8414
C8225
C8419
C8226
C8228C8229
R8202
R8203
C3024
R8204
C8421
R8205
R8206
C8422
R8207
C8423
C8424
R8208
R8209
IC8201
D8401
C8425
IC8202
D8402
C8427
D8403
D8404
C8429
D8405
R3005
D8406
D8407
R3007
D8408
R8210
R3008
IC3001
D8409
R8212
R8213
R8408
R8214
R8215
C3036
IC8402
R8216
IC8403
R8217
C8433
IC8404
D8410
R8218
R8219
C8436
C8438
R8410
C8439
R8411
L8101L8102
L8103L8104L8105
R8221
L8106
R8222
P4002
C1103
L8107
R8223
C1104
L8108
R8224
C8440
C1105
R8225
L8109
C8441
P1701
C1106
R8226
C1107
C8443
C1108
R8228
C1109
R8229
C8445
C8446
C8447
L8110
C8448
R8420
VA1901
C1301
C8449
L8111
C1302
VA1902
L8112
R8422
C1303
VA1903
R8423
L8113
C1110
C1304
VA1904
R8230
L8114
C1111
Q1301
VA1905
C1305
P3071
R8425
C1112
C1306
VA1906
Q1302
R206
C1113
C1307
VA1907
Q1303
R8233
R8427
C1308
VA1908
R8234
R8428
C3054
C1115
C1309
R8429
C3055
C1116
C8452
C1117
C8453
R218
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MAIN Unit (Side B)
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MAIN Unit (Chip Side B)
R8238
C3058
C8454
Q8450
C3059
C8455
R8239
C8457
C8459
R8431
C3060
R8240
R8241
L263
C8460
R218
Q4001
C1701
Q4002
C1702
Q4003
C1703
Q4004
C1704
C8465
C1706
C8466
C8467
C1707
C1708
C1709
C8469
R224
C1130
R225
IC1101
IC1102
R8446
C1903
C4013
R8447
C1904
C1710
C3074
C1905
C1711
FB1401
C3075
C4016
C8472
C3076
C1712
FB1402
D1113
C1713
R8257
C1907
R8258
C1714
C1908
Q1905
R8259
Q1906
C1716
C8476
D1117
C4403
C8477
C4404
D1118
C1330
C1718
R3054
C8478
C8479
C4405
D1119
C1331
C4406
R3056
R8452
C1332
C4407
Q4403
R8453
C1333
C4408
R8260
C4409
R8261
C3081C3082
R8262
IC3052
C1143
C4023
R8457
D1120
R8458
C4025
D1121
C1721
C4026
C1722
C4027
C4028
C4411
D1701
C4412
C202
C4413
D1703
R4004
C4414
C204
D1704
R4005
FB1801
R1701
R8461
R8462
R1702
R1703
C4418
C1150
R1704
C208
D4201
IC4001
C1921
C1151
C209
R1705
IC4002
C4032
C1152
R8466
IC4003
C1153
R1707
C4228
IC4004
C1154
R1708
R8468
C1730
IC4005
R4201
D1901
D3071
R1709
R4202
D3072
C1732
R4203
C1157
D3073
IC1703
C1733
R4010
R4204
D1904
C1158
C210
D1905
R4205
R4011
Q1925
C1159
X201
C1735
R3071
D1906
R4012
R4206
R1902
R3072
C1736
D1907
R4207
R4013
R1903
C1737
R3073
D1908
R4014
R4208
R1904
C214
R3074
C1738
R1710
IC4201
R4209
R4015
D1909
R3075
C1739
R4016
R1907
R1713
C4234
C1160
C218
R1714
R1909
C4235
R4401
R4019
R1715
R8475
C4042
R4402
C4236
R1716
R8476
C4237
R4403
R8477
R1717
R4404
R4210
C4044
D1910
R8478
C1740
R1718
R1719
D1911
C4045
R4211
R1331
R4212
C4046
R1332
R4406
R4407
C4047
R4213
C4048
R4214
R4020
R4408
C220
R4409
R4215
IC4401
R1911
C221
C1745
IC4402
R4216
R4022
R1912
C222
C1746
IC4403
R4023
R4217
C1747
R4024
IC4404
R1914
C224
C1748
R8480
IC4405
R4025
R4219
R1915
C2301
C225
C1749
R8481
IC4406
R4026
C226
R262
D1726
IC4407
C2303
R8483
R4028
C4050
IC4408
R4410
C4051
IC4409
R4411
R1725
R4412
R266
R4413
R4220
C4054
R4414
R1728
C1750
D1921
C4055
R4415
R1729
D1922
R4416
C4056
D1923
C4057
R4418
D1924
R1150
C230
R4031
R1921
D1925
R1151
R4419
C231
R3091
R4032
R1152
R3092
R4033
R1153
C1757
R1154
R1730
C2311
R1155
C1759
R8491
R1926
C2312
R1156
R8492
D1736
R1157
C237
R8493
R1928
R4420
C2314
R8494
R4421
C4061
C239
R1735
R8495
C1951
C4256
C1952
R4422
R1736
R8496
C2316
C2317
R8497
R1737
C1954
R1738
R4231
R4425
C1955
R1739
C1956
R4427
C1957
R1930
R4428
C1958
R4429
C241
C1959
R4042
R1932
C242
R4043
R1933
R4044
C244
R1740
R4045
C2322
R283
R1743
C2323
R4048
C248
C1960
D2301
C1961
R1745
R4049
R1746
C1962
R4433
C1963
R1747
R4434
R1748
C1964
R1749
C1965
R2302
C1966
C1967
C250
C1968
C251
C1969
R2305
R2306
R2307
R1750
C255
IC2301
R1754
C1970
R1755
R4443
R4251
C1975
R4252
R4446
C1976
R4253
R2313
R4448
R4254
R2314
C1978
R4255
C1979
D201
R4256
R4257R4258
IC4251
R4259
TH2301
IC4252
TH2302
C8103
IC4253
C1980
R1958
C8104
C269
C8105
C1981
R4452
C1982
C8106
R4453
C1983
C8107
R4260
R4454
C1984
C8108
R2320
R4261
R4455
R2321
C1985
C8109
C1986C1987
R4458
C1988
R1961
R2325
C1989
R2326
C8110
R2328
R2329
C8111
R4269
C8112
C8113
C1990
C8114
C8115
C1991
C1992
C8116
C8117
C1994
C8118
C8119
C1996
C1997
C1998
C1999
R2335
IC202
IC204
C8120
IC205
C8121
C8122
C8123
C8124
C8125
C8126C8127
C8128
C8129
R8101
R8102
R8107
C8130
FB3001
C8131
R8109
FB3002
C8133
FB3003
C8134
FB3004
FB3005
FB3006
C8137
C8138
C8139
R8111
R8113
R8117
C8140
R8500
R8118
C8141
C8143
C8144
R8506
R8123
Q1001
R8125
R8127
FB3021
R8129
FB3022
C1013
C1014
C1015
C1016
C1401
C1402
C1404
FB3035
FB3036
C1406
FB3037
C1408
FB3038
R8140
R8141
C1412
X4001
C1801
IC1002
IC261
Q1802
FB3051
R1012
FB3052
R1013
FB3053
R1014
FB3054
R1015
D1401
FB3055
R1016
D1402
FB3056
D1403
R1018
R1019
R1401
R1405
R1020
R1021
R1409
R1022
FL8103
R1023
FB4004
FB1703
R1410
R1411
FB1901
FB3071
FB1902
FB3072
FB3073
C2000
C2001
C2002
C2004
C2005
Q1831
C2006
C2007
C2008
C2009
C2010
C2011
C2012
C2013
C2014
C2015
C2016
C2017
C2018
C2601
C2602
FB2301
FB2302
FB2304
FB2305
FB2309
FB1951
FB1952
FB1953
FB1954
R2601
FB1955
Q201
FB1956
R2603
FB1957
Q204
IC2601
C3001
C3002
L203
C3003
L204
C3004
L205
C3005
C8401
L206
C3006
C3007
C8403
C8404
C3008
C3009
C8405
Q8401
Q8402
Q8404
R4561
C8409
C3010
C3011
C3012
C3013
C3014
C3015
FB8101
C3016
FB8102
C3017
C8220
FB8104
Q8410
C3018
C3019
C8221
FB8106
C8227
C3020
C3021
C3022
C3023
C8420
C3025
C3026
C3027
C8230
C3028
C8231
C3029
R3001
C8426
R3002
R3003
R3004
C8428
R8401
R8402
R8403
R8404
C3030
R8405
C3031
C3032
IC3002
R8406
C3033
R8407
C3034
C8430
R8409
IC8401
C3035
C8431
C8432
C3037
C8434
C3038
D8411
C3039
C8435
C8437
FB201
FB202
R8412
R8413
R8414
R8220
C3040
C1101
P4001
R8415
C3041
C1102
C3042
R8416
C3043
R8417
R8418
C3044
Q1101
C3045
R8419
Q1102
C8442
C3046
C3047
C8444
Q1105 Q1106
Q1107Q1108
R201
R8421
R202
Q262
R203
C3051
R205
C3052
R8232
C3053
R207
C1114
R208
C8450
C8451
Q3051
R8235
R8236
Q3052
C3056
C3057
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[2] R/C, LED Unit
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R/C, LED Unit (Side A)R/C, LED Unit (Side B)R/C, LED Unit (Chip Side A)R/C, LED Unit (Chip Side B)
P101
R101
R108R109
C102
C107
D101
D103
Page 66
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[3] MINI AV Unit
1
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MINI AV Unit (Side A)
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[4] KEY
1
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S155
R153
D152
S154
S152
R151
D151
S151
R152
S153
R154
S156
S157
D155
P151
KEY Unit (Side A)KEY Unit
(Chip Parts Side A)
Page 68
LC-37D44E/S/RU-BK/GY
7 – 1
LC37D44E-BK
Service Manual
CHAPTER 7. SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC DIAGRAM
VOLTAGE MEASUREMENT CONDITION:
1. The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 230V.
Signals are fed by a colour bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.
INDICATION OF RESISTOR & CAPACITOR:
RESISTOR
1. The unit of resistance “Ω” is omitted.
(K=kΩ=1000 Ω, M=MΩ).
2. All resistors are ± 5%, unless otherwise noted.
(K= ± 10%, F= ± 1%, D= ± 0.5%)
3. All resistors are 1/16W, unless otherwise noted.
CAPACITOR
1. All capacitors are µF, unless otherwise noted.
(P=pF=µµF).
2. All capacitors are 50V, unless otherwise noted.
CAUTION:
This circuit diagram is original one, therefore there may be a
slight difference from yours.
SAFETY NOTES:
1. DISCONNECT THE AC PLUG FROM THE AC
OUTLET BEFORE REPLACING PARTS.
2. SEMICONDUCTOR HEAT SINKS SHOULD BE
REGARDED AS POTENTIAL SHOCK HAZARDS
WHEN THE CHASSIS IS OPERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH “ ” () ARE
IMPORTANT FOR MAINTAINING THE SAFETY OF THE
SET. BE SURE TO REPLACE THESE PARTS WITH
SPECIFIED ONES FOR MAINTAINING THE SAFETY AND
PERFORMANCE OF THE SET.
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[2] SCHEMATIC DIAGRAM
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MAIN Unit (1/13)
AND SHADED COMPONENTS=SAFETY RELATED PARTS
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MAIN Unit (2/13)
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MAIN Unit (3/13)
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MAIN Unit (4/13)
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MAIN Unit (5/13)
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MAIN Unit (6/13)
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MAIN Unit (7/13)
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MAIN Unit (8/13)
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MAIN Unit (9/13)
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MAIN Unit (10/13)
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MAIN Unit (11/13)
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MAIN Unit (12/13)
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MAIN Unit (13/13)
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R/C, LED Unit
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MINI AV Unit
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KEY Unit
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PartsGuide
LC-37D44E/S/RU-BK/GY
PARTS GUIDE
No. S88N6LC37D44E
LCD COLOUR TELEVISION
MODELS
LC-37D44E/S/RU-BK/GY
CONTENTS
[1]PRINTED WIRING BOARD
ASSEMBLIES
[2]LCD PANEL
[3]DUNTKE449FM03 (MAIN Unit)
[4]DUNTKE457FM03 (R/C, LED Unit)
[5]DUNTKE266FM01 (KEY Unit)
[6]DUNTKE491FM01 (MINI-AV Unit)
[7]CABINET PARTS
[8]LCD MODULE ASSEMBLY
[9]SUPPLIED ACCESSORIES
[10] PACKING PARTS
[11] SERVICE JIGS
Parts marked with "" are important for maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
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NO.PARTS CODE
[1] PRINTED WIRING BOARD ASSEMBLIES
N DUNTKE449FM03CPNRMAIN Unit
N DUNTKE457FM03AQNRR/C, LED Unit
N DUNTKE266FM01ARNRKEY Unit
N DUNTKE491FM01AYNRMINI-AV Unit
N RDENCA267WJQZBMNPPOWER Unit
N RUNTKA497WJQZBHNPINVERTER Unit