Sharp Aquos LC-20S4E User manual

LC-20S4E
SERVICE MANUAL
SHARP CORPORATION
LCD COLOUR TELEVISION
In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
CONTENTS
»IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................2
»SPECIFICATIONS ........................................................................................................................................4
»OPERATION MANUAL .................................................................................................................................5
»DIMENSIONS ...............................................................................................................................................7
»REMOVING OF MAJOR PARTS..................................................................................................................8
»ADJUSTING PROCEDURE OF EACH SECTION .....................................................................................12
»TROUBLE SHOOTING TABLE ..................................................................................................................21
»BLOCK DIAGRAM......................................................................................................................................26
»OVERALL WIRING DIAGRAM ...................................................................................................................28
»DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................30
»SCHEMATIC DIAGRAM
ËINVERTER Unit .......................................................................................................................................31
ËSUB Unit ..................................................................................................................................................32
ËMAIN Unit.................................................................................................................................................36
ËOPERATION Unit.....................................................................................................................................44
ËR/C, LED Unit ..........................................................................................................................................45
»PRINTED WIRING BOARD ASSEMBLIES ................................................................................................46
»REPLACEMENT PARTS LIST....................................................................................................................61
»PACKING OF THE SET..............................................................................................................................73
Page
LC-20S4E
MODEL
S85M5LC20S4E/

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LC-20S4E
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SAFETY NOTICE
Many electrical and mechanical parts in LCD 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"
IMPORTANT SERVICE SAFETY PRECAUTION
ËService work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and the servicing guidelines which follow:
and shaded areas in the Replacement Parts Lists 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.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
•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 1.05V 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.
BEFORE RETURNING THE 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 theAC cord directly into a 220~240 voltAC 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.
CAUTION: FOR CONTINUED PROTECTION
AGAINSTARISK OF FIRE REPLACE ONLY WITH
SAME TYPE F6700 (1A, 250V), F6701 (1A, 250V),
F6702 (1A, 250V), F6703 (1A, 250V) F6704 (1A,
250V) AND F7701 (T3.15A, 250V) FUSE.
DVM
AC SCALE
1.5k ohm
10W
TO EXPOSED
METAL PARTS CONNECT TO KNOWN EARTH
GROUND
0.15 µF
TEST PROBE

3
LC-20S4E
Precautions for using lead-free solder
1 Employing lead-free solder
"AII 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
Precautions on removing the Sub PWB
•CAUTION
Before taking out and servicing the Sub unit, be sure to discharge the C7703 electrolytic capacitor. Otherwise
you may get an electric shock by the capacitor’s charging voltage.

4
LC-20S4E
SPECIFICATIONS
■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.
Model LC-20S4E
Speakers 11 cm 4 cm 2 pcs.
LCD panel 20" Advanced Super View & BLACK TFT LCD
Terminals EXT1: 21-pin Euro-SCART
Number of dots 921,600 dots VGA
EXT2: S-VIDEO, VIDEO, AUDIO
Video colour system PAL/SECAM/NTSC
OUT: AUDIO
TV
Antenna: DIN
Headphones: 3.5 mm øjack (front)
OSD language
Brightness 430 cd/m
2
Power requirement
Power consumption
Viewing angles H: 170˚V: 170˚
Weight (approx.)
Audio amplifier 2.1 W 2
Operating temperature
0°C to +40°C (+32°F to +104°F)
×
×
English/Spanish/German/French/Italian/Swedish/Dutch/Russian/Portuguese/Turkish/Greek/Finnish/Polish
Display only: 6.3 kg Display with stand: 7.0 kg
AC 220-240V, 50/60 Hz
68W (0.8W Standby) AC 230 V
TV-Standard (ITU-R): B/G, I, D/K, L/L’TV-Tuning System: Auto preset 200 ch.
STEREO/BILINGUAL: NICAM, A2 stereo AUTO PRESET: YES CATV: ~Hyper Band

5
LC-20S4E
OPERATION MANUAL
Part Names of the Main Unit
OPC sensor
Remote sensor
OPC (Optical Picture Control) indicator
The OPC indicator lights up green when the "Backlight" is set
to "Auto (OPC)".
STANDBY/ON indicator
The STANDBY/ON indicator lights up green when the power is on, and red when
in the standby mode (the indicator will not light when the main power is off).
Upper control panel
ËUsing the control panel of the main unit •(Input),P ( )/( ) (Channel),(–)/(+) (Volume) and MENU on the control panel of the main unit have the same functions
as the same buttons on the remote control. Fundamentally, this operation manual provides a description based on operation using
the remote control.
Speaker
Headphones
Plug the headphone mini-plug into the headphone jack.
Adjust the sound volume using (+)/(–) on the
remote control.
NOTE
•Headphones are not included in the supplied accessories.
•No sound is heard from the main unit speakers when a
headphone mini-plug is connected into the headphone jack.
•Do not set the volume at a high level. Hearing experts
advise against extended listening at high volume levels.
Controls
(MAIN POWER)
•The STANDBY/ON indicator instantly changes from red to green and the
LCD TV set is turned on.
•To turn off the main power, press again.
Ë
Operating the menu with the control panel
Button operations on the control panel correspond to the ones on the
remote control as shown below.
On-screen display
TV Volume
10
(Input)OK on the remote control
MENU MENU on the remote control
P()/()(
Channel)"/'on the remote control
(–)/(+) (Volume)\/|on the remote control
<Example> Decoder
VCR
DVD Player
To EXT1 terminal
To EXT2 terminal
21-pin Euro-SCART connector
Antenna terminal
<Example>
Audio amplifier
<Example> DVD Player
VCR
Camcorder
Home video game system
To AUDIO OUT terminal
Audio/Video cable
Video
Audio (L)
Audio (R)
Audio (L)
Audio (R)
S-Video cable
S-Video
Audio cable
EXT1
EXT2
AUDIO OUT
RGB (21-pin Euro-SCART)
VIDEO
AUDIO (L)
AUDIO (R)
AUDIO OUT (L)
AUDIO OUT (R)
S-VIDEO
Connecting External Devices
Terminals
You can enjoy picture and sound by connecting devices, such as a VCR or home video
game system, to the terminals located on the rear of the LCD TV set.
When connecting an external device, turn off the power of the LCD TV set first to prevent
any possible damage.
NOTE
•For the cable, use a commercially available audio/video cable.
•PC connection is not possible.
•For more information about external device connections, see the operation manuals of your external devices.
•Make sure that the corresponding cables are connected to each terminal. Connecting other cables may result in a malfunction.
•EXT2 has two terminals, VIDEO and S-VIDEO terminals. If your external device has an S-VIDEO terminal, S-VIDEO connection is
recommended. S-VIDEO provides a finer, more detailed picture. If both terminals are connected, S-VIDEO terminal takes a priority.

6
LC-20S4E
Preparation
Part Names of the Remote Control
OK, Programme Table
Yellow, Sleep Timer
Blue, Status Display
Turns on the status display when
the menu is not displayed.
Channel Select
TV input mode: Selects the channel.
This LCD TV set allows you to select
up to 200 channels (0 to 199).
Teletext mode: Selects the page.
MENU
Displays theTV menu.
Returns to the previous screen.
Red, Picture menu Upwards/Downwards
Selection, Zoom Display
Function (Teletext mode)
END
Returns to normal screen.
(Power)
Switches the LCD TV set
power on or standby.
Right/Left Selection
ROTATE
Rotates the display in every
direction.
BACKLIGHT
Selects the brightness and OPC
of the display.
Green, Sound menu
(Flashback)
Switches the channels between
the currently tuned one
and the previous one.
(Hold)
Temporarily holds the current
Teletext page.
(Subtitle)
Displays the Teletext Subtitle
directly.
(Sound)
Switches to the sound mode.
(Subpage)
Displays theTeletext Subpage
directly.
(Teletext)
Displays theTeletext mode
screen.
(Reveal)
Displays hidden information
such as solutions to riddles
and puzzles.
EXT2
EXT1 1 S- 6
EXT1Mode: EXT2 TV
•EXT1: Select this mode when viewing the signals from the video
equipment connected to the EXT1 (21-pin Euro-SCART (RGB))
terminal.
•EXT2: Select this mode when viewing the signals from the video
equipment connected to the EXT2 terminals using the VIDEO or
S-VIDEO terminal for video input.
If both VIDEO and S-VIDEO terminals are connected with cables,
the S-VIDEO input terminal is selected as the high priority.
NOTE
(+)/(
-
)(Volume)
Changes the sound volume.
(Mute)
Switches the sound on and off.
Sound off Sound on
•When (+)/(
-
)is pressed in the
Mute mode, the sound turns on, and
the volume indicator is displayed.
•The Mute function is cancelled when
is pressed.
P ( )/( ) (Channel)
TV input mode: Selects the channel.
•Channel “0”is reserved for RF
output of VCR.
•Channels not set with "Automatic
search" or via "Setup" are set to be
skipped and therefore cannot be
displayed using P ( )/( ).
Teletext mode:
Selects the page.
(Input)
Switches the input source between
EXT1, EXT2 and TV modes.
TV Volume
10
Using the Remote Control
Installing Batteries in the Remote Control
Before using the LCD TV set for the first time, install the two “AAA”size batteries (supplied) in the remote control. When the
batteries become depleted and the remote control fails to operate, replace the batteries with new “AAA”size batteries.
Caution!
Precautions regarding batteries
Improper use of batteries can result in a leakage of chemicals and/or explosion. Be sure to follow the instructions below.
•Different types of batteries have different characteristics. Do not mix batteries of different types.
•Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new batteries and/or cause old
batteries to leak chemicals.
•Remove batteries as soon as they are depleted. Chemicals that leak from batteries can cause a rash. If chemical
leakage is found, wipe it off with a cloth.
•The batteries supplied with the LCD TV set may have a shorter operating time
•If the remote control is not to be used for an extended period of time, remove
Control
Cautions regarding use of the remote control
•Do not apply shock to the remote control. In addition, do not
expose the remote control to liquids, and do not place it in an area
with high humidity.
•Do not install or place the remote control in direct sunlight. The
heat may cause deformation to it.
•The remote control may not work properly if the remote sensor
window is in direct sunlight or strong light. In such a case, change
the angle of the lighting or main unit, or operate the remote control
closer to the remote sensor window.
1
Open the battery cover.
2
Insert two “AAA”size batteries.
3
Close the battery cover.
•Place batteries with their
terminals corresponding to the
(+) and (–) indications in the
battery compartment.
•Engaging the lower
claw with the remote
control, close the cover.
•Slide the cover while
pressing the ( ) part.
How to Adjust the Angle
To change the vertical angle of the LCD TV set, tilt the screen up to 2.5
degrees forwards or 10 degrees backwards. The LCD TV set can also
be rotated up to 25 degrees to right and left. Please adjust the angle so
that the LCD TV set can be watched most comfortably.
Tilt the display by grabbing onto the
carrying handle while securely holding
down the stand with other hand.
7m
30˚30˚
Remote
sensor
Using the Remote
Use the remote control by pointing it towards the remote sensor
window of the main unit. Objects between the remote control and
sensor window may prevent proper operation.
due to storage conditions.
the batteries from the remote control.

7
LC-20S4E
DIMENSIONS
Unit: mm
100
117
310
482.8
138.9
53.4 97.6
447
403.1
300.8
293.4
151
475.8
432.5
100
48.2 43.3
224

8
LC-20S4E
SC4001
P6705
P6703
P6702
P6701
P6700
SC1201
CN1
SC105
P3902
P3901
P3301
SC3601
SC4201
P3601 SC6701
SC102 P7701
SC106
SC104
7
7
7
7
7
7
7
7
Main PWB
Sub PWB
R/C,LED PWB Inverter PWB
Operation PWB
REMOVING OF MAJOR PARTS
1. Remove the stand cover fixing screw (1 pc.).
2. Remove the stand fixing screws (4 pcs.).
3. Remove the carrying handle fixing screws (4 pcs).
4. Remove the terminal cover.
5. Remove the cabinet B fixing screws (10 pcs.).
6. Remove the cabinet B after opening from the direction of an arrow.
7. Detach the connector from each PWB.
Cabinet A
Cabinet B
Terminal Cover
Carrying Handle
Stand Cover Stand
5
5
5
4
6
3
2
1

9
LC-20S4E
8. Remove the 2 lock screws from the main PWB and undo the hooks a. Detach the main PWB, together with its
terminals, from the chassis frame.
9. Remove the 4 lock screws from the sub PWB and undo the hooks b, c, d and e. Detach the sub PWB together
with its terminals, from the chassis frame.
10. Remove the 3 lock screws from the operation PWB, and detach the operation PWB.
11. Remove the 3 lock screws from the inverter PWB and take out the inverter PWB.
12. Remove the 2 lock screws from the R/C, LED PWB and take out the R/C, LED PWB.
13. Remove the 2 lock screws each from the right and left speakers and take out both the speakers.
8
9
11
13 13
12
Speaker (L)
Speaker (R)
R/C,LED PWB
Main PWB Sub PWB
Operation PWB
e
c
b
a
Inverter PWB
Chassis Frame
d
9
10

10
LC-20S4E
»Precautions in handling the LCD panels
1. Work in a clean room (with humidities below 50%).
2. Be sure to wear an anti-static armband.
3. Handle the panels on an electro-conductive mat.
4. Be careful not to fall, shake and shock the panels.
14. Detach the back shield.
15. Remove the 5 lock screws from the bezel and detach the bezel.
Note: Carefully undo the hooks in the four directions.
16. Detach the LCD panel from the backlight case.
Note1:Carefully undo the hooks in the four directions.
Note2:Do not remove the LCD panel from the panel chassis. Be careful not to touch the LCD panel’s glass faces,
driver IC, PWBs and other components with bare hands. (Otherwise defects may be caused in the
production line.)
17. Remove the diffusion sheets (top), lens sheet, diffusion sheet (bottom), and diffusion plate.
Note: Fit the diffusion plate and sheets tightly in the backlight casing.
If set out of position, the panel may get cracked.
18. Detach the lamp unit from the backlight case.
Back Shield
(PSLDMA763WJFW)
Backlight Case
(LHLDZ3104TPZA)
Lamp Unit, x5
(RLMPC2401TPZZ)
Diffusion Plate
(PSLDK2553TPZZ)
Diffusion Sheet (Bottom)
(PSLDK2554TPZZ)
Lens Sheet
(POFMA0220TPZZ)
Bezel
(LANGK3261TPZA)
Diffusion Sheet (Top), x2
(PSLDK2567TPZZ)
20" LCD Panel
18
17
16
15
15
15
14

11
LC-20S4E
»Precautions at the time of the side-B(back) service of main, sub and Inverter unit.
1. Remove only SC1201 of the FPC for connection between Main unit (SC1201) and LCD panel (CN1), and connect
the extended cable (QCNW-C458WJQZ) for service.
2. Remove the PWB unit fixing screws (main unit: 2 pcs., sub unit: 4 pcs., inverter unit: 3 pcs., operation unit: 3 pcs.,
R/C, LED unit: 2 pcs.)
Step Part No. Description
1 QCNW-C458WJQZ Extension Cable 80-pin Main (SC1201)-LCD Panel (CN1)
SC1201
CN1
1
2
Main PWB
Operation PWB
Inverter PWB
Operation PWB
(Back Side)
Inverter
PWB
(Back Side)
Main PWB
(Side-B)
Sub PWB
(Back Side)
Sub PWB
R/C, LED PWB
R/C, LED PWB
(Side-B)

12
LC-20S4E
ADJUSTING PROCEDURE OF EACH SECTION
The best adjustment is made before shipping. If any position deviation is found or after part replacement is
performed, adjust as follows.
Preparation for adjustments
Use a stable AC power source.
LC-20S4E AC Power : 230V
1.Adjusting procedure
Complete Set → Power ON →Enter Adjustment Process Mode (By Remote Control) → RF AGC adjustment →
DCXO adjustment → Common Bias adjustment →White Balance adjustment
2.Entering the adjustment process mode
•After power on, press the adjustment process mode key on the service remote control.
•Switching on the TV set, holding pushed the "Input" and "Volume (–)" key at once, the TV set enters in the "K"
mode.
In this condition, pushing "Volume (–)" and "P (Ù)" key, the adjust mode appears.
3.Key operation in the adjustment process mode
•Use the "UP" or "DOWN" cursor key to select the adjustment mode item.
•Use the "LEFT" or "RIGHT" cursor key to change the data.
4.Initialization
When the EEPROM (IC101) has been replaced or when the EEPROM has been initialized, readjust the each
adjust the each adjustments.
4-1. When the EEPROM has been replaced:
1) Plug in the AC cord to an AC power outlet and turn on the power.
2) When the setting is finished, the LED turns from red to green. In about 15 seconds, the initialization is
completed.
4-2. When initializing the EEPROM data and making readjustments:
1) Enter the Adjustment Process mode.
2) Select the INIT TV item and press the "RIGHT" cursor key to enable the item.
3) Unplug the AC cord and plug it again in the AC power outlet. Turn on the power.
4) When the setting is finished, the LED turns from red to green. In about 5 seconds, the initialization is
completed.
<Note>
When the INIT TV item has been enabled in the adjustment process, be sure to unplug theAC cord and plug it in
again. Then start adjustments. Otherwise the readjusted data cannot be put in memory.
4-3. Setting the screen size (inches)
1) Enter the Adjustment Process mode.
2) Check the model number.
3) Hold down the "LEFT" or "RIGHT" cursor key longer than 2 seconds, and select a screen size (20).
S4E Main Ver *.**
Scaler Ver *.**.**
INCH SIZE 20

13
LC-20S4E
5.Adjustment
5-1. RF AGC adjustment
1) Feed in the colour bar signal (Field strength: 52dBµ V)
2) InAdjustment Mode, select RFAGCAUTO ("OFF") and press the "RIGHT" cursor key to start the adjustment.
3) Automatic adjustment complete, when it displayed "OK".
4) RF AGC data will be in the range of 0-63. If "NOK" is displayed, adjustment failed.
5) Check that the value is 30±10.
5-2. DCXO adjustment
1) Feed in the B/G NICAM signal. (Field strength: more than 70dBµ V.)
2) InAdjustment Mode, select the DCXOAUTO ("OFF") and press "RIGHT" cursor key to start the adjustment.
3) Automatic adjustment complete when "OK" is displayed. If "NOK" is displayed, adjustment failed.
4) Check that the value is 58±25.
5-3. Common bias adjustment
1) In adjustment mode, select the COM BIAS.
2) Select the internal signal "flicker pattern".
* Remote control direct key: No. 19 (13 Hex).
3) Adjust the flicker to become smallest.
4) After adjustment, exit from the "flicker pattern" display.
* Remote control direct key: No. 19 (13 Hex).
5-4. White balance adjustment
[A] White balance pre-adjustment
1) Feed the 0%/100% white signal.
2) In Adjustment Mode, select AWBSD ("OFF") and press "RIGHT" cursor key to start the adjustment.
3) Automatic adjustment complete when "OK" is displayed.
[B] White balance adjustment
For 40% white signal adjust RGB CUTOFF2 and for 80% white signal adjust RGB-GAIN.
1) Composite Signal
[Input signal] Composite video signal with picture of 80% white(Left) and 40% white(Right).
[Adjustment] Adjust the RGB CUTOFF2 and RGB-GAIN
[Adjustment method MANUAL]
CUT OFF RGB CUT OFF2 Fix the G value, and adjust R, B value.
GAIN WB RGB-GAIN Fix the G value, and adjust R, B value.
( Data taken from MINOLTA CA-210)
S4E Main Ver ***
Scaler Ver *****
RF AGC OK
30 RF AGC Auto adjustment complete
RF AGC data (Example)
S4E Main Ver ***
Scaler Ver *****
DCXO AUTO OK
** DCXO Auto adjustment complete
DCXO data
Adjustment Inspection
Specification Specification
80% white x 0.285 0.002 0.01
y 0.291 0.002 0.01
40% white x 0.277 0.003 0.01
y 0.284 0.003 0.01
←0%
←100%
LCD SCREEN

14
LC-20S4E
7. Lamp error detection
7-1. Functional 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 followings occur.
1The 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.)
2If the situation 1happens 5 times sequentially, television can not be turned ON. (The power LED remains
red.)
7-2. Countermeasures
7-2-1.Check when turning OFF the lamp error detection
If the power has been turned off 5 times because of lamp error, hold down the unit’s "INPUT" and "Volume
(–)" key simultaneously and turn on the unit’s power switch. The TV set gets back on power in the "K"
mode.
In this state, press the unit’s "Volume (–)" and "P (Ù)" key simultaneously. TheAdjustment Process mode
shows up.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" of the adjustment process is 1 or more. If it is 1 or more, it indicates
the lamp error detection was executed.
7-2-2.Resetting of the lamp error count
After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO
RESET" of the adjustment process and set the number to 0 using the "LEFT" or "RIGHT" cursor key.
Afterwards, perform the operation check to confirm that the lamp error detection does not function.
Reset 0
S4E Main Ver *.**
Scaler Ver *.**.**
ERROR NO RESET 5
6.Factory Setting
6-1. Make the factory setting using the adjustment remote control.
6-2. Different factory settings.
Model Key Name Remote Control Code OSD Language Setting
A3IK0S4E0 Shipment Setting 1 1000 0011 1111 110 German (00001 FEh)
A3IK0S4K0 Shipment Setting 2 1000 0000 1010 110 English (00001 A8h)
A3IK0S4R0 Shipment Setting 3 1000 0110 1011 110 Russian (00001 EBh)
A3IK0S4F0 Shipment Setting 4 1000 0100 1011 110 French (00001 E9h)
A3IK0S4I0 Shipment Setting 6 1000 0000 1011 110 Italian (00001 E8h)
Model Language Country Colour System Sound System AV Control Voltage
A3IK0S4E0 German Germany PAL B/G NO
A3IK0S4K0 English UK PAL I NO
A3IK0S4R0 Russian Russia SECAM D/K NO
A3IK0S4F0 French France SECAM L/L' YES
A3IK0S4I0 Italian Italy PAL B/G NO

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LC-20S4E
8. Hotel mode
8-1. How to enter the Hotel mode.
1) Turn on the power and enter the Adjustment Process mode.
2) Using the "up" or "down" cursor key on the remote controller, select the Hotel mode.
3) Using the "right" cursor key on the remote controller, change the setting from "0" to "1". Now the Hotel
mode shows up.
4) Using "up" or "down" cursor key on the remote controller, select each item .
Make the setting with "left" or "right" cursor key .
5) Finally quit theAdjustment Process mode and turn off power. The TV set comes on in the Hotel mode after
the next switch-on.
8-2. Hotel mode settings
1) Power on fixed (OFF ↔ON )
When it is set to "ON", the TV is impossible to be switch off by main power switch on TV or power
button on remote control .
2) Maximum volume (0 - 60)
You can set the maximum volume at your desired level.
3) Volume fixed (Variable ↔Fixed)
You can fix the sound volume at your desired level.
When you set "Fixed", the sound volume which you have just selected is fixed.
4) Volume fix level (0 - 60)
If "Fixed" has been selected, you can set a fixed volume at your desired level.
5) RC button ( →Enable ↔Limited ↔Disable ←)
When you set "Limited", all the other remote control keys than "power", "P (ù)/(Ù)", "volume (+)/(–)"
and brightness are inoperative.
When you set "Disable", the remote control keys are inoperative in their otherwise usual way.
6) Panel button (Enable ↔Disable)
If "Disable" has been selected, the set's keys other than POWER gets disabled.
7) Menu button (Enable ↔Disable)
If "Disable" has been selected, "menu" keys both on the set and remote control get disabled.
8) On Screen Display (Yes ↔No)
If "No" has been selected, the On Screen Display does not appear.
9) Input mode start (→Normal ↔0 ↔199 ↔Input2 ↔Input1 ←)
When any other item than "Normal" has been selected, the set gets started in a selected input mode at
the next power-on.
Adjustment Process menu
Hotel mode = "0"
Hotel mode 0
EXT CONTROL OFF
Hotel mode = "1"
Hotel mode 1
Power on fixed **
Menu button **
Maximum volume **
On Screen Display **
Volume fixed **
Input mode start **
Volume fix level **
Input mode fixed **
RC button **
EXT CONTROL OFF
Panel button **

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LC-20S4E
9. Software Loading
1) Upgrading the software or after replacement of IC151, IC501 or Main PWB, make sure to upload the processors
with updated software.
2) Please use the dedicated Interface JIG (JIGINF-001) and supplied programs for upgrading the software.
3) This model employs two software;
•SCALER microprocessor software
•MAIN microprocessor software
Please upload the SCALER microprocessor software first follow by MAIN microprocessor software.
1. SCALER microprocessor
1) Set Interface JIG switch to position "SCALER".
2) Power ON the set and plug Interface JIG connector to P2002.
3) Run the ISP_Tool.exe program.
10) Input mode fixed (Variable ↔Fixed)
If "Fixed" has been selected, any channels and input modes other than those selected in the start
mode cannot be picked up.
8-3. Canceling the Hotel mode
1) Turn on the power and enter the Adjustment Process mode.
2) Using the "UP" or "DOWN" cursor key, select the Hotel mode.
3) Using the "LEFT" cursor key, change the setting from "1" to "0".
4) Finally quit the Adjustment Process mode and turn off the power. The TV set comes on out of the Hotel
mode after the next switch-on.

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LC-20S4E
4) First click [SST / ATMEL] and then follow by [Identify] to identify the flash memory.
Confirm the item below in Comment Window.
5) Click [Select Intel HEX File …] to open the source files. The source file name are
"Sedna_Release_****.hex"
Confirm the source file is loaded correctly.
6) Next click the [Erase] to erase all the data in the flash memory. Confirm the erase process is complete
without any error.
7) Then click [Program] to start uploading the source file into the flash memory. After uploading process is
complete, confirm there are no error.
8) Click [Verify] to verify the uploaded data and confirm there are no error.

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LC-20S4E
9) Finally click [Restart System] to initialize. Confirm "Reset done" in Comment Window.
10) Power OFF the set by unplugging AC Cord, remove the JIG from the plug and wait for 1 minute before
power ON again.
Notes: If any error occur during any process, power OFF the set and repeat the all the process again. If
these still fail, please erase Main Software and repeat the whole process again. To erase Main software,
please refer to MAIN microprocessor step No. 1) to 5) only.
2. MAIN microprocessor
1) Set JIG switch to position "LOC".
2) Power ON the set and plug Interface JIG connector to P2002.
3) Run the WISP.exe program.

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LC-20S4E
4) First click [Enter ISP Mode] then click [Send]. If the following window appear, click [Yes]
Confirm ISP status "Ready".
If "Entering ISP is not successful" occur, repeat step No. 4) again. If still fail, unplug the AC cord and
repeat from step No. 2) again.
5) Then click [Erase Flash], follow by [Send]. Confirm the Program, PK26 & Character are all "OK" and ISP
status is "Ready".
If "Failed" occur, unplug the AC cord and repeat the whole process again from beginning.

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LC-20S4E
6) Next click [Write Flash] and load the source file by clicking [Browse]. The source file name are
"LC20S4E_****.hex". Once the data is loaded successfully click [Send]. Confirm the Program, PK26 &
Character are all "OK" and ISP status is "Ready".
If "Failed" occur, unplug the AC cord and repeat the whole process again from beginning.
7) Finally click [Verify Flash] and [Send] to verify the flash memory. Confirm the Program, PK26 & Character
are all "OK" and ISP status is "Ready". If "Failed" occur, unplug the AC cord and repeat the whole process
again from beginning.
8) Power OFF the set and remove the JIG.