Sharp Aquos LC 37GB5U User manual

LC-37GB5U
SERVICE MANUAL
LCD COLORTELEVISION
MODEL LC-37GB5U
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.
CONTENTS Page
»LIST OF CHANGED PARTS ...........................................................................................................................2
»IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................3
»SPECIFICATIONS........................................................................................................................................6
»OPERATION MANUAL ................................................................................................................................7
»DIMENSIONS ............................................................................................................................................14
»REMOVING OF MAJOR PARTS................................................................................................................15
»BLOCK DIAGRAM .....................................................................................................................................22
»OVERALL WIRING DIAGRAM...................................................................................................................24
»PARTS LIST ...............................................................................................................................................26
»PACKING OF THE SET .............................................................................................................................31
OUTLINE
This model is based on the LC-37D7U and is equipped with a redesigned speaker, and is changed some
function. This Service Manual covers the modifications alone. For the other points, refer to the LC-26/32/
37D7U Service Manual.
S45H5LC37GB5U
SHARP CORPORATION 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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LC-37GB5U
LIST OF CHANGED PARTS
LC-37D7U → LC-37GB5U
Ref.No. Description LC-37D7U LC-37GB5U Note
PWB ASSEMBLIES
AV Unit DUNTKC971WE01 DUNTKC971WE03 *Some parts changed
AV Unit DUNTKD115WE01 DUNTKD115WE03 *Some parts changed
KEY Unit DUNTKC972WE01 DUNTKC972WE03 No parts changed
KEY Unit DUNTKD116WE01 DUNTKD116WE03 No parts changed
R/C LED Unit DUNTKC973WE01 DUNTKC973WE03 *Some parts changed
R/C LED Unit DUNTKD117WE01 DUNTKD117WE03 *Some parts changed
LCD CONTROL Unit DUNTKC793FE08 DUNTKC793FE33 *Some parts changed
MAIN Unit DUNTKC794FE02 DUNTKC794FE03 No parts changed
DIGITAL Unit DKEYDC956FE15 DUNTKC956FE07 *Some parts changed
POWER SUPPLY Unit RDENCA109WJZZ 
INVERTER A Unit RUNTKA099WJZZ 
INVERTER B Unit RUNTKA100WJZZ 
INVERTER A GND Unit RUNTKA101WJZZ 
INVERTER B GND Unit RUNTKA102WJZZ 
EXT SP TERMINAL-L Unit DUNTKC974WE01  
EXT SP TERMINAL-L Unit DUNTKD118WE01  
EXT SP TERMINAL-R Unit DUNTKC975WE01  
EXT SP TERMINAL-R Unit DUNTKD119WE01  
LCD PANEL 37”Wide LCD Panel Unit RLCDTA036WJZZ 
AV Unit
R3926 Metal Oxide VRS-CY1JF222JY VRS-CY1JF102JY *Change
R3930 Metal Oxide VRS-CY1JF682JY VRS-CY1JF102JY *Change
These parts is deleted from “LC-37D7U”. *Delete
Q1110, L1103, C1110, C1113, R1114, R1118, UNT1101
R/C LED Unit
D103 Diode RH-PXA087WJZZY RH-PXA089WJZZY *Change
R108 Metal Oxide VRS-CY1JF911JY VRS-CY1JF561JY *Change
LCD CONTROL Unit
R2026 Metal Oxide VRS-CY1JF223JY  *Delete
R2029 Metal Oxide  VRS-CY1JF223JY *Add
DIGITAL Unit
IC8451 IC RH-iXB333WJZZQ VHiLHF12F01-1Q *Change
R8176 Metal Oxide  VRS-CH1JF103JY *Add
R9509 Metal Oxide  VRS-CH1JF000JY *Add
R9529 Metal Oxide  VRS-CZ1JF472JY *Add
These parts is deleted from “LC-37D7U”. *Delete
IC8051, IC8052, IC8454, IC8501~8504, IC9003, IC9402, IC9403, IC9405, IC9406, IC9501~9503, IC9701~9703,
Q9002, Q9003, D9001, D9002, D9701~9703, X8501, X9001, X9501, FL8051, L8051~8061, L8501, L8502,
L9702, L9703, C8051~8087, C8460, C8461, C8502, C8503, C8505~8534, C9002, C9005, C9006, C9404~9411,
C9413, C9415~9417, C9501~9535, C9701~9709, C9711, C9713, C9714, R8051~8054, R8056, R8057, R8465,
R8466, R8501~8538, R8540~8555, R9008, R9017, R9018, R9020, R9024, R9026, R9029~9031, R9033, R9035,
R9038~9041, R9043, R9101, R9120, R9401, R9403~9405, R9408~9411, R9413, R9414, R9418, R9501~9504,
R9508, R9512, R9514~9519, R9528, R9530~9533, R9701, R9702, R9704~9710, FB8501, FB9001~9003,
FB9401~9403, FB9501, FB9502, FB9701, J8052, J8501, J8502, J9001, SC9401, SC9501, LUG9401, LUG9402
CABINET AND MECHANICAL PARTS
Please refer to a Parts list.
PACKING PARTS AND ACCESSORIES
Please refer to a Parts list.

3
LC-37GB5U
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SAFETY NOTICE
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 " å"
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.
CAUTION: FOR CONTINUED PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAMETYPE FUSE.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
BEFORE RETURNINGTHE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks:
1. 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.
2. 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.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
»Plug the AC cord directly into a 120 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.
»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 0.75 Vrms (this corresponds to 0.5
mA rms AC.) or more is excessive and indicates a
potential shock hazard which must be corrected
before returning the monitor to the owner.
IMPORTANT SERVICE SAFETY PRECAUTION
ËService work should be performed only by qualified service technicians who are thor-
oughly familiar with all safety checks and the servicing guidelines which follow:
DVM
AC SCALE
1.5k ohm
10W
TO EXPOSED
METAL PARTS CONNECT TO KNOWN EARTH
GROUND
0.15 µF
TEST PROBE
F701, F702 (5A, 250V)
F703 (2A, 250V), F704 (117°C, 2A) F705 (1A,
DC450V)

4
LC-37GB5U
PRECAUTION:POUR LA PROTECTION CONTINUE
CONTRELES RISQUESD'INCENDIE,REMPLACER
LE FUSIBLE
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AVIS POUR LA SECURITE
De nombreuses pièces, électriques et mécaniques,
dans les téléviseur ACL présentent des caractéristiques
spéciales relatives àla sécurité, qui ne sont souvent
pas évidentes àvue. Le degréde protection ne peut
pas être nécessairement augmentée en utilisant des
pièces de remplacement étalonnées pour haute tension,
puissance, etc.
Les pièces de remplacement qui présentent ces
caractéristiques sont identifiées dans ce manuel; les
pièces électriques qui présentent ces particularités sont
PRECAUTIONS A PRENDRE LORS DE LA REPARATION
ËNe peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement
accoutumé à toute vérification de sécurité et aux conseils suivants.
identifiées par la marque " å" et hachurées dans la
liste des pièces de remplacement et les diagrammes
schématiques .
Pour assurer la protection, ces pièces doivent être
identiques àcelles utilisées dans le circuit d'origine.
L'utilisation de pièces qui n'ont pas les mêmes
caractéristiques que les pièces recommandées par
l'usine, indiquées dans ce manuel, peut provoquer des
électrocutions, incendies, radiations X ou autres
accidents.
AVERTISSEMENT
1. N'entreprendre aucune modification de tout circuit.
C'est dangereux.
2. Débrancher le récepteur avant toute réparation.
VERIFICATIONS CONTRE L'INCEN-DIE ET
LE CHOC ELECTRIQUE
Avant de rendre le récepteur à l'utilisateur, effectuer
les vérifications suivantes.
1. Inspecter tous les faisceaux de câbles pour s'assurer
que les fils ne soient pas pincés ou qu'un outil ne soit
pas placéentre le châssis et les autres pièces
métalliques du récepteur.
2. Inspecter tous les dispositifs de protection comme les
boutons de commande non-métalliques, les isolants,
ledos ducoffret,lescouverclesoublindagesde réglage
et de compartiment, les réseaux de résistance-
capacité, les isolateurs mécaniques, etc.
3. S'assurer qu'il n'y ait pas de danger d'électrocution en
vérifiant la fuite de courant, de la facon suivante:
•Brancher le cordon d'alimentation directem-ent àune
prise de courant de 120V. (Ne pas utiliser de
transformateur d'isolation pour cet essai).
•A l'aide de deux fils àpinces, brancher une résistance
de 1.5 kΩ10 watts en parallèle avec un condensateur
de 0.15µF en série avec toutes les pièces métalliques
exposées du coffret et une terre connue comme une
conduite électrique ou une prise de terre branchée à
la terre.
•Utiliser un voltmètre CA d'une sensibilitéd'au moins
5000Ω/V pour mesurer la chute de tension en travers
de la résistance.
•Toucher avec la sonde d'essai les pièces métalliques
exposées qui présentent une voie de retour au châssis
(antenne, coffret métallique, tête des vis, arbres de
commande et des boutons, écusson, etc.) et mesurer
la chute de tension CA en-travers de la résistance.
Toutes les vérifications doivent être refaites après avoir
inverséla fiche du cordon d'alimentation. (Si
nécessaire, une prise d'adpatation non polarisée peut
être utilisée dans le but de terminer ces vérifications.)
Tous les courants mesurés ne doivent pas dépasser
0.5 mA.
Dans le cas contraire, il y a une possibilitéde choc
électrique qui doit être supprimée avant de rendre le
récepteur au client.
DVM
ECHELLE CA
1.5k ohm
10W
0.15 µF
SONDE D'ESSAI
AUX PIECES
METALLIQUES
EXPOSEES
BRANCHER A UNE
TERRE CONNUE
F701, F702 (5A, 250V)
F703 (2A, 250V), F704 (117°C, 2A) F705 (1A,
DC450V)

5
LC-37GB5U
Precautions for using lead-free solder
1 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:
2 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.
3 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.
Indicates lead-free solder of tin, silver and copper.
Lead-free wire solder for servicing
Part No, ★Description Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL
ZHNDAi126500E J φ0.6mm 500g(1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM
LFa

6
LC-37GB5U
SPECIFICATIONS
Item 37"LIQUID CRYSTAL TELEVISION,
Model: LC-37GB5U
TV
Function
American TV Standard ATSC/NTSC System
VHF/UHF VHF 2-13ch, UHF 14-69ch
CATV 1-125ch
Audio multiplex BTSC System
Terminals AV in, COMPONENT in
INPUT 2 AV in, COMPONENT in
INPUT 4 HDMI in (Type-A) with HDCP
INPUT 3 S-VIDEO in, AV in
OSD language English/French/Spanish
Power Requirement AC 120 V, 60 Hz (FOR NORTH AMERICA)
AC 110-240 V, 50/60 Hz(FOR OTHERS)
Power Consumption
Weight
Accessories Operation manual ( 1), Remote control unit ( 1), AC cord ( 1), "AAA" size
battery ( 2), Cable clamp ( 1), Cable tie ( 1)
TV-standard (CCIR)
Receiving
Channel
Rear INPUT 1
As 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.
LCD panel 37" Advanced Super View & BLACK TFT LCD
Number of dots 3,147,264 dots (1366 768 3 dots)
Brightness 450 cd/m
2
Viewing angles H : 170°V : 170°
Audio out 10W 2
MONITOR OUTPUT S-VIDEO out, AV out
189 W (0.2 W Standby with AC 120 V)
INPUT 5 Audio in, DVI-I in with HDCP
ANALOG ANTENNA 75 Unbalance, F Type for VHF/UHF/CATV in 1
DIGITAL ANTENNA 75 Unbalance, F Type for Digital Air in 1
DIGITAL AUDIO OUTPUT Optical Digital audio output 1 (PCM/Dolby Digital)
42.4 lbs./19.2 kgDisplay only
50.1 lbs./22.7 kg
Display with stand
Digital Terrestrial
Broadcast (8VSB)
2-69ch
×
×
×
×
×
×××
×××
×
Ω
Ω

7
LC-37GB5U
OPERATION MANUAL
Part names
TV (Front) TV (Rear)
POWER indicator**
OPC sensor*
POWER (On/Off)
button
INPUT
button
Volume buttons (VOL /)
Channel buttons
(CH / )
Remote control sensor OPC indicator*
RESET*
INPUT 3
terminals
SYSTEM
RESET**
DIGITAL
AUDIO
OUTPUT
*Press RESET if the TV cannot return to its original state after performing various operations.
AV MODE resets to DYNAMIC (Fixed)
TV channel returns to initial channel setting (Air: 2ch, Cable:1 or 2ch)
Audio setting initializes
Dolby Virtual resets to Off
Image position initializes
**Press SYSTEM RESET if the TV does not operate after starting up.
NOTE
Pressing RESET will not work if the TV is in standby mode.
Pressing RESET will not delete channel preset or secret number.
AC INPUT
terminal
RS-232C
terminal
INPUT 2
terminals
INPUT 1
terminals
INPUT 5
terminals
INPUT 4
terminal
MONITOR
OUTPUT
terminals
Antenna input
terminal (ANALOG)
Antenna input terminal
(DIGITAL)

8
LC-37GB5U
P Using external equipmentart names
Remote control unit
NOTE
• When using the remote control unit, point it at the TV.
3
2
111
5
4
6
14
12
13
15
16
17
718
820
21
22
23
9
10 25
19
24
1TVPOWER: Switches the TV power on or enters
standby mode.
2 DISPLAY: Displays the channel information.
3 SOURCE POWER: Turns the power of the external
equipment on and off.
4 External equipment operational buttons: Operates
the external equipment.
5 0 9/ (DOT): Sets the channel.
6VOL/: Sets the volume.
7Virtual: Selects Virtual Dolby Surround settings.
8 EXIT: Turns off the menu screen.
9 SLEEP: Sets the sleep timer.
10 AUDIO: Selects the MTS/SAP or the audio mode during
multi-channel audio broadcasts.
11 FUNCTION: Switches the remote control for TV, CBL/
SAT, VCR, DVD and AUDIO operation. Indicator lights
up for the current mode.
* To enter the code registration mode, you need to press
FUNCTION and DISPLAY at the same time.
12 :When pressed all buttons on the remote control unit
will light. The lighting will turn off if no operations are
performed within about 5 seconds. This button is used
for performing operations in low-light situations.
13 VIEW MODE: Selects the screen size.
14 FLASHBACK: Returns to the previous channel or
external input mode.
15 INPUT: Selects a TV input source. (TV, INPUT 1, INPUT
2, INPUT 3, INPUT 4, INPUT 5)
16 CH / : Selects the channel.
17 MUTE: Mutes the sound.
18 MENU: Displays the menu screen.
19 ////ENTER: Selects a desired item on the
screen.
20 RETURN: Returns to the previous menu screen.
21 FAVORITE CH
A, B, C, D: Selects four preset favorite channels in four
different categories.
While watching, you can toggle the selected channels
by pressing A, B, C and D.
22 FREEZE: Sets the still image. Press again to return to
normal screen.
23 CC: Displays captions during closed-caption source.
24 EDIT: Registers favorite channel.
25 AV MODE: Selects an audio or video setting.
(AV mode: STANDARD, MOVIE, GAME,
USER, DYNAMIC (Fixed), DYNAMIC. PC mode:
STANDARD, USER.)
-
You can connect many types of external equipment to your TV, like a DVD player, VCR, Digital TV tuner, PC,
HDMI equipment, game console and camcorder. To view external source images, select the input source from
INPUT on the remote control unit or on the TV.
CAUTION
To protect all equipment, always turn off the TV before
connecting to a DVD player, VCR, Digital TV tuner, PC,
HDMI equipment, game console, camcorder or other
external equipment.
NOTE
Please refer to the relevant operation manual (DVD player,
PC, etc.) carefully before making connections.
Each time INPUT is pressed, the input source toggles.
Refer to your external equipment operation manual for
the signal type.
Displaying an external equipment
image
Explanation here is for the setting when connecting
DVD to INPUT1 terminal.
INPUT button
To watch a DVD image, select "INPUT1" from "INPUT
SOURCE" menu using INPUT on the remote control
unit or on the TV.
INPUT SOURCE
TV(Air)
TV(Cable)
INPUT1
INPUT2
INPUT3
INPUT4
INPUT5
1
MENU
[Option ... Input Select]
Auto
COMPONENT
VIDEO
For INPUT1 signal
Select the desired signal type.
The setting is stored and can be selected on the
"INPUT SOURCE" menu.
Press MENU and the MENU screen displays.
2
3
Press / to select "Input Select", and then
press ENTER.
4
Press / to select "Option".
NOTE
If the image does not come in clearly, you may need to
change the input signal type setting on the "Input Select"
menu.
Selecting the INPUT signal
(Example)

9
LC-37GB5U
Using external equipment
DVD player
Connecting a DVD player
You can use the INPUT 1, INPUT 2, INPUT 3 and INPUT 5 terminals when connecting to a DVD player and other
audiovisual equipment.
AV cable
(commercially available)
DVD player
DVD player
ø3.5 mm stereo minijack cable
(commercially available) DVI cable (commercially available)
When using component cable. (INPUT 1 or 2)
When using composite cable. (INPUT 1, 2 or 3)
When using DVI cable. (INPUT 5)
Component video cable
(commercially available)
Audio cable
(commercially
available)
VCR/Game console/
Camcorder
AV cable
(commercially available)
Connecting aVCR, game console or camcorder
A VCR, game console, camcorder and some other audiovisual equipment are conveniently connected using
the INPUT 1 to 3 terminals.
S-video cable
(commercially available)
NOTE
The S-video terminal has priority over the video terminals. (INPUT 3 only)

10
LC-37GB5U
Using external equipment
Connecting a DigitalTV STB (Air or Cable)
You can use the INPUT 1, INPUT 2, INPUT 3 or INPUT 5 terminals when connecting a Digital TV STB and other
audiovisual equipment.
DigitalTV STB
AV cable
(commercially available)
DigitalTV STB
DigitalTV STB
ø3.5 mm stereo minijack cable
(commercially available) DVI cable (commercially available)
When using component cable. (INPUT 1 or 2)
When using composite cable. (INPUT 1, 2 or 3)
When using DVI cable. (INPUT 5)
Component video cable
(commercially available)
Audio cable
(commercially
available)
Connecting HDMI equipment
You can use the INPUT 4 terminal when connecting an HDMI equipment.
HDMI equipment
HDMI cable
(Commercially available)
Displaying an image from HDMI
equipment
To watch an HDMI equipment image, select
"INPUT4" from "INPUT SOURCE" menu
using INPUT on the remote control unit or
on the TV.
INPUT SOURCE
TV(Air)
INPUT1
INPUT2
INPUT3
INPUT4
INPUT5INPUT5
1
Press MENU and the MENU screen displays.
2
3
Press / to select "HDMI Setup", and then
press ENTER.
4
Press / to select "Option".
MENU
[Option ... HDMI Setup]
Option
Digital Noise Reduction
Output Select
Audio Only
Quick Shoot
[Fixed]
HDMI Setup
[Low]
[Off]
5
Press / to select the desired item and
press ENTER.
Press / / / to select the desired setting
and press ENTER.
6
NOTE
Refer to your external equipment operation manual for
the signal type.
Selectable items
Auto/RGB/YCbCr
4:4:4/YCbCr 4:2:2
Auto/ITU601/
ITU709
Standard/
Out of Standard
Enable/Disable
HDMI Setup
items
Signal
Type
Color
Matrix
Dynamic
Range
Auto View
Description
Select the signal type from
an HDMI terminal. Unless
the image quality looks
obviously poor, select Auto.
Select the internal color
space conversion method
when an RGB signal is
input. Normally, select
Auto.
Select the signal amplitude
range. Normally, select
Standard.
Set whether or not to use
VIEW MODE based on
signal recognition,
including an HDMI signal.

11
LC-37GB5U
Using external equipment Appendix
PC with DVI terminal
Connecting a PC
Use the INPUT 5 terminal to connect a PC.
ø3.5 mm stereo minijack cable
(commercially available)
DVI cable
(commercially available)
ø3.5 mm stereo
minijack cable
(commercially
available)
PC with analog RGB terminal
RGB/DVI conversion cable
(commercially available)
To optical digital input of external audio devices
Optical fibre cable
Using Digital Audio Output
It is possible to output audio through the DIGITAL AUDIO OUTPUT terminal.
PCM audio outputs from the terminal.
Removing the stand
Before detaching (or attaching) stand, unplug the AC cord from the AC INPUT terminal.
CAUTION
Do not remove the stand from theTV unless using an optional wall mount bracket to mount it.
Before attaching/detaching stand
Before performing work make sure to turn off the TV.
Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being
damaged.
NOTE
To attach the stand, perform the above steps in reverse order.
2
Detach the stand from the TV.
(Hold the stand so it will not drop from the edge of
the base area.)
1
Unfasten the four screws used to secure the
stand in place.
Setting theTV on the wall
CAUTION
Installing the TV requires special skill that should only be performed by qualified service personnel. Customers
should not attempt to do the work themselves.SHARP bears no responsibility for improper mounting or mounting
that results in accident or injury.
Using an optional bracket to mount theTV
You can ask a qualified service professional about using an optional bracket to mount the TV to the wall.
Carefully read the instructions that come with the bracket before beginning work.
Vertical mounting Angular mounting
Hanging on the wall
Wall mount bracket. (See the bracket instructions for details.)

12
LC-37GB5U
Appendix
PC compatibility chart
Apple and Macintosh are registered trademarks
of Apple Computer, Inc.
DDC is a registered trademark of Video Electronics
Standards Association.
Power Management is a registered trademark of
Sun Microsystems, Inc.
VGA and XGA are registered trademarks of
International Business Machines Co., Inc.
PC/MAC Resolution Horizontal Frequency Vertical Frequency VESA Standard
PC 31.5 kHz
37.9 kHz
31.5 kHz
37.9 kHz
31.5 kHz
37.9 kHz
37.5 kHz
43.3 kHz
31.5 kHz
35.1 kHz
37.9 kHz
48.1 kHz
46.9 kHz
53.7 kHz
48.4 kHz
56.5 kHz
60.0 kHz
68.7 kHz
45.0 kHz
48.1 kHz
64.0 kHz
34.9 kHz
49.7 kHz
60.2 kHz
640 x 400
720 x 400
VGA
640 x 480
WVGA 848 x 480
SVGA 800 x 600
1024 x 768XGA
1280 x 720
WXGA 1280 x 768
SXGA 1280 x 1024
VGA 640 x 480
MAC13"
XGA 1024 x 768
MAC19"
SVGA 832 x 624
MAC16"
60 Hz
85 Hz
60 Hz
85 Hz
60 Hz
72 Hz
75 Hz
85 Hz
60 Hz
56 Hz
60 Hz
72 Hz
75 Hz
85 Hz
60 Hz
70 Hz
75 Hz
85 Hz
60 Hz
60 Hz
60 Hz
67 Hz
75 Hz
75 Hz
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
RS-232C port specifications
Return codeCommand 4-digits Parameter 4-digits
PC Control of theTV
When a program is set, the TV can be controlled from the PC using the RS-232C terminal. The input signal
(PC/AV) can be selected, the volume can be adjusted and various other adjustments and settings can be
made, enabling automatic programmed playing.
Attach an RS-232C cable cross-type (commercially available) to the supplied Din/D-Sub RS-232C for the
connections.
NOTE
This operation system should be used by a person who is accustomed to using computers.
Communication conditions
Set the RS-232C communications settings on the PC to match the TV's communications conditions.
The TV's communications settings are as follows:
Baud rate:
Parity bit:
Data length:
Stop bit:
Flow control:
9,600 bps
8 bits
None
1 bit
None
Command format
Communication procedure
Send the control commands from the PC via the RS-232C connector.
The TV operates according to the received command and sends a response message to the PC.
Do not send multiple commands at the same time. Wait until the PC receives the OK response before sending
the next command.
Eight ASCII codes CR
Command 4-digits: Command. The text of four characters.
Parameter 4-digits: Parameter 0 9, x, blank, ?
Parameter
Input the parameter values, aligning left, and fill with blank(s) for the remainder. (Be sure that 4 values are input for the
parameter.)
When the input parameter is not within an adjustable range, "ERR" returns. (Refer to "Response code format".)
No problem to input any numerical value for "x" on the table.
When "?" is input for some commands, the present setting value responds.
C1 C2 C3 C4 P1 P2 P3 P4
0055
100
30
0009
0
????
?
+
-

13
LC-37GB5U
Appendix Basic adjustment settings
Command table
•About the command except being indicated here, it is outside the guarantee range of operation.
CONTROL ITEM COMMAND
PARAMETER
CONTROL CONTENTS
POWER SETTING It shifts to standby.
It input-switches by the toggle. (It is the same as an input change key)
It input-switches to TV. (A channel remains as it is. (Last memory))
It input-switches to INPUT1~INPUT5.
An input change is also included.
Although it can choose now, it is toggle operation in inside.
Although it can choose now, it is toggle operation in inside.
(Toggle)
Input terminal number (1- 5)
AUTO
VIDEO
COMPONENT
DIGITAL PC
ANALOG PC
DIGITAL AV
ANALOG AV
(Toggle)
STANDARD
MOVIE
USER
GAME
DYNAMIC (Fixed)
DYNAMIC
Volume (0- 60)
AV mode. ( 10)
PC mode. (0- 180)
AV mode. ( 20)
PC mode. (0- 100)
Only PC mode. (0- 180)
Only PC mode. (0- 40)
(Toggle) [AV]
An input change is included if it is not TV display.
In Air, 2- 69ch is effective.
In Cable, 1- 125ch is effective.
If it is not TV display, it will input-switch to TV. (same function as CH )
If it is not TV display, it will input-switch to TV. (same function as CH )
Toggle operation of a closed caption.
(Toggle)
Side Bar [AV]
S.Stretch [AV]
Zoom [AV]
Stretch [AV]
Normal [PC]
Zoom [PC]
Stretch [PC]
Dot by Dot [PC]
On
Off
OFF
OFF TIMER 30 MIN.
The channel number of TV
The channel number of TV 1
The channel number of TV 1
(Toggle)
(1- 125)
AUTO
POWR
ITGD
ITVD
IAVD
INP1
INP5
INPUT SELECTION A TOGGLE
INPUT SELECTION B
AV MODE SELECTION
VOLUME
POSITION
VIEWMODE
Dolby Virtual
SLEEP TIMER
CHANNEL
CC
DIRECT
(ANALOG)
(DIGITAL)
CH UP
CH DOWN
CHANNEL
H-POSITIONH-POSITION
V-POSITION
CLOCK
PHASE
INPUT 1
INPUT 5
AVMD
VOLM
HPOS
VPOS
CLCK
PHSE
ACDV
OFTM
DCCH
CHUP
CHDW
CLCP
WIDE
0
x
x
*
0
5
6
7
8
1
2
0
*
*
*
*
*
0
0
*
x
x
x
1
1
2
0
1
2
3
4
5
6
7
8
*
*
1
2
3
4
5
6
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
*
*
*
*
*
*
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
DIGITAL Air (Two-Part numbers, 2-digit plus 2-digit)(0101-9999)
DIRECT
CHANNEL
DA2P * * * *
_
_
_
_
(Toggle)
AUDIO SELECTION ACHA x _ _ _
_
_
OFF TIMER 60 MIN.
OFF TIMER 90 MIN.
2
3
_
_
_
_
_
_
OFF TIMER 120 MIN.4___
_
_
(Toggle)
On
Off
MUTE MU T E 0
1
2
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
INPUT5: AV mode. ( 90)***_
_
_
_
_
INPUT5: AV mode. ( 50)
***_
_
_
_
_
_
_
_
_
_
_
_
_
_
AUTO
VIDEO
COMPONENT
AUTOINP2
INPUT 2 0
1
2
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
TV
INPUT1-5
NOTE
If an underbar (_) appears in the parameter column, enter a space.
If an asterisk (*) appears, enter a value in the range indicated in brackets under CONTROL CONTENTS.
As long as that from which the parameter ( ) in the table is a numerical value, it may write anything.
Return code (0DH)
Response code format
Normal response
Problem response (communication error or incorrect command)
Return code (0DH)
OK
ERR
±
±
±
±
+
-
×
AV input mode menu items
List of AV menu items to help you with
operations
OPC
Backlight
Contrast
Brightness
Color
Tint
Sharpness
Advanced
C.M.S.
ColorTemp.
Black
3D-Y/C
Monochrome
Film Mode
I/P Setting
Picture
No Signal Off
No Operation Off
EZ Setup
CH Setup
Antenna Setup-DIGITAL
Input Label
Parental CTRL
Position
Picture Flip
Language
Treble
Bass
Balance
Dolby Virtual
Audio Only
Digital Noise Reduction
HDMI Setup
Input Select
Output Select
Quick Shoot
Caption Setup
Audio
Power Control
Setup
Option
PC input mode menu items
List of PC menu items to help you with
operations
OPC
Backlight
Contrast
Brightness
Red
Green
Blue
Advanced
C.M.S.
Picture
Power Management
Input Signal
Auto Sync.
Input Label
Fine Sync.
Picture Flip
Language
Audio
Power Control
Setup
Treble
Bass
Balance
Dolby Virtual
Option
Audio Only
Input Select
Output Select
Quick Shoot
Video Setup
Audio Setup
Digital Setup

14
LC-37GB5U
DIMENSIONS
Unit: inch/(mm)
26
21
/ 32 (677)
43
3
/ 8 (1102)
32
3
/ 8 (822.6)
181/4
(463.8)
2139/64
(549)
2431/32
(634)
141/4
(362)
12
5
/ 64 (307)
4
19
/ 64 (109)4
1
/ 4 (108)
7
7
/ 8 ( 200)
1415/64
(
361.5)
77/8
(
200)
349/64
(
96)

15
LC-37GB5U
REMOVING OF MAJOR PARTS
1
4
4
4
4
4
2Front Cabinet
Rear Cabinet
Terminal Cover
Stand
3
SD Card Cover
1. Remove the 4 lock screws 1from the stand, and detach the stand.
2. Detach the Terminal Cover.2
3. Detach the SD Card Cover.3
4. Remove the 33 lock screws 4from the Rear Cabinet, and detach the Rear Cabinet.

16
LC-37GB5U
9Main Shield A
LCD PWB Shield
8
Center Angle
5
P2002
P151
Top Control
Cover
KEY PWB
6
7
9
5. Remove the 7 lock screws 5and detach the Center Angle.
6. Remove the KEY PWB.
6-1. Remove the 2 lock screws 6from the Top Control Cover.
6-2. Remove the 3 lock screws 7from the KEY PWB.
7. Remove the 5 lock screws 8and detach the LCD PWB Shield.
8. Remove the 4 lock screws 9and detach the Main Shield A.

17
LC-37GB5U
(CN7542)
(CN7543) (CN7541)
(CN7547)
(P7611)
(CN7544)
(CN7545)
(CN7546)
(CN7612)
(CN7613)
(CN7614)
(CN7615)
(SC4651) (SC4652) (CN7404)
(CN7405)
(CN7406)
(CN7407)
(CN7408)
(CN7472)
(CN7473)
(CN7474)
(CN7475)
(P7705)
(CN706)
(CN704) (CN7501)
(CN707)
(CN705)
(CN702)
(CN7471)
(CN7503)
(CN703)
(P3805) (CN7502)
(P1803)
(P1804)
(P1501)
(SC3201)
(SC3202)
(P2501)
(SC3200)
(P3101)
(P5703)
(P3804)
(P1105) (P1802)
(SC3201)
(SC3202)
(P2006) (P2003)
(P7707)
(P7704) (SC4601)
(P2004)
(SC9601)
10
11
12
13 13
Jack Cover C
Digital PWB
Main Shield B
Speaker Box (R) Speaker Box (L)
9. Disconnect all the connectors from all the PWBs.
10. Remove the 5 lock screws 0and detach the Main Shield B.
11. Remove the 4 lock screws qand detach the Digital PWB
12. Remove the 4 lock screws wand detach the Jack Cover C.
13. Detach the 2 Speaker Box.e

18
LC-37GB5U
14
Main PWB
Main Shield C
Radiation Shield
Radiation
Shield
LCD Controller PWB
AV PWB
Jack Cover A
Jack Cover B
15
16
18
19
20
14. Remove the 6 lock screws r.Detach the Main PWB and Main Shield C.
15. Remove the AV PWB.
15-1. Remove the 3 lock screws t, 2 screws y, and detach the AV PWB.
15-2. Remove the 1 lock screw iand detach the Jack Cover B.
15-3. Remove the 4 lock screws oand detach the Jack Cover A.
16. Remove the 1 lock screw pand detach the LCD Controller PWB.Detach the Radiation Shields.

19
LC-37GB5U
INVERTER-GND A
and B PWB INVERTER
A and B PWB
24
R/C, LED
PWB
22 23
21
Power PWB
25
17. Remove the 6 lock screws aand detach the Power PWB.
18. Remove the 6 lock screws s. Detach the INVERTER-GND A and INVERTER-GND B PWB.
19. Remove the 8 lock screws d. Detach the INVERTER A and INVERTER B PWB.
20. Remove the 2 lock screws 24 and detach the R/C LED PWB.
21. Remove the 2 lock screws
25 and detach the LCD Panel Ass'y.

20
LC-37GB5U
26
27
27
37" LCD Panel Unit Reflection/Deflection Sheet
(PSHEPA245WJZZ)
Diffusion Sheet
(PSHEPA290WJZZ )
Diffusion Panel
(PCOVUA053WJZZ)
Lamp Holder(Top)
(LHLDZA521WJKZ)
Lamp Holder Bottom
(LHLDZA522WJKZ)
Lamp Holder(Top)
Lamp Holder Bottom
Fluorescent Lamp
(KLMP-A049WJZZ)
Sheet Spacer 1
(PSPAKA092WJZZ)
Sheet Spacer 2
(PSPAKA093WJZZ)
Back Light Chassis
22. Remove the 4 lock screws 26 from the 37" LCD Panel Unit, and detach the 37" LCD Panel Unit.
23. Detach the sheet spacer 1 and sheet spacer 2.
24. Detach the Diffusion and Reflection/Deflection Sheets and Diffusion Panel.
25. Remove the 6 lock screws 27 from the Lamp Holder (top), and detach the Lamp Holder (top).
26. Remove the Fluorescent Lamps.