Sharp LC-20S4E Schematic

LC-20S4E

SERVICE MANUAL

S85M5LC20S4E/

LCD COLOUR TELEVISION

MODEL

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

» 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

LC-20S4E

Page

SHARP CORPORATION

LC-20S4E

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: FOR CONTINUED PROTECTION AGAINST A RISK 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.

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 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.

• 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 1.05V 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.

DVM

AC SCALE

1.5k ohm 10W

0.15 µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

23456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012

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

and shaded areas in the

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.

components having such features are identified by " å"

23456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012

Replacement Parts Lists and

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:

L Fa

Indicates lead-free solder of tin, silver and copper.

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.

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

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.

LC-20S4E

SPECIFICATIONS

Model LC-20S4E LCD panel 20" Advanced Super View & BLACK TFT LCD Number of dots 921,600 dots VGA Video colour system PAL/SECAM/NTSC TV

Brightness 430 cd/m Viewing angles H: 170˚ V: 170˚ Audio amplifier 2.1 W 2

Speakers Terminals EXT1: 21-pin Euro-SCART

OSD language Power requirement

Power consumption

Weight (approx.) Operating temperature

■ 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.

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

11 cm 4 cm 2 pcs.

Headphones: 3.5 mm ø jack (front)

English/Spanish/German/French/Italian/Swedish/Dutch/Russian/Portuguese/Turkish/Greek/Finnish/Polish

AC 220-240V, 50/60 Hz 68W (0.8W Standby) AC 230 V

Display only: 6.3 kg Display with stand: 7.0 kg 0°C to +40°C (+32°F to +104°F)

× ×

EXT2: S-VIDEO, VIDEO, AUDIO

OUT: AUDIO

Antenna: DIN

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

Ë Using 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.

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

(

Input

)

OK on the remote control

MENU MENU on the remote control

(

)

(

)(

Channel

)

"/' on the remote control

(–)

(+)

(

Volume

)

\/| on the remote control

Decoder

VCR

DVD Player

To EXT1 terminal

To EXT2

terminal

21-pin Euro-SCART connector

Antenna terminal

Audio amplifier

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.

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.

Displays the TV 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 the Teletext Subpage

directly.

(Teletext)

Displays the Teletext 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

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.

Open the battery cover.

Insert two “AAA” size batteries.

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.

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.

117

LC-20S4E

DIMENSIONS

Unit: mm

475.8

432.5

43.3

403.1

310

482.8

100

300.8

138.9

53.4 97.6

447

293.4

151

224

100

48.2

LC-20S4E

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 B

Terminal Cover

Carrying Handle

Stand Cover

Cabinet A

Stand

CN1

SC4201

Operation PWB

Main PWB

SC1201

SC104

P3901

SC105

SC102

P7701

SC106

P3902

Sub PWB

P3601

P6705

SC6701

P6703

P6702

P6701

SC3601

SC4001

R/C,LED PWB

P3301

P6700

Inverter PWB

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.

Main PWB

Chassis Frame

Operation PWB

Sub PWB

Inverter PWB

Speaker (R)

R/C,LED PWB

Speaker (L)

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)

Lens Sheet (POFMA0220TPZZ)

20" LCD Panel

Backlight Case (LHLDZ3104TPZA)

Lamp Unit, x5 (RLMPC2401TPZZ)

Diffusion Plate (PSLDK2553TPZZ)

Diffusion Sheet (Bottom)

(PSLDK2554TPZZ) Diffusion Sheet (Top), x2 (PSLDK2567TPZZ)

Bezel (LANGK3261TPZA)

LC-20S4E

SC1201

CN1

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

(Side-B)

» 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)

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 the AC 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

*.**

5.Adjustment

5-1. RF AGC adjustment

1) Feed in the colour bar signal (Field strength: 52dBµ V)

2) In Adjustment Mode, select RF AGC AUTO ("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.

LC-20S4E

S4E Main Ver

Scaler Ver *****

RF AGC OK

***

RF AGC Auto adjustment complete RF AGC data (Example)

5-2. DCXO adjustment

1) Feed in the B/G NICAM signal. (Field strength: more than 70dBµ V.)

2) In Adjustment Mode, select the DCXO AUTO ("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.

S4E Main Ver DCXO AUTO OK

Scaler Ver *****

***

DCXO Auto adjustment complete DCXO data

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

LCD SCREEN

←0% ←100%

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 Inspection

Specification Specification

80% white

40% white

x 0.285 0.002 0.01 y 0.291 0.002 0.01 x 0.277 0.003 0.01 y 0.284 0.003 0.01

[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)

LC-20S4E

6.Factory Setting

6-1. Make the factory setting using the adjustment remote control.

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)

6-2. Different factory settings.

Model Language Country Colour System Sound System 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

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. 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 , 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 "V olume (–)" and "P (Ù)" key simultaneously. The Adjustment 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.

AV Control Voltage

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.

S4E Main Ver *.** ERROR NO RESET 5

Afterwards, perform the operation check to confirm that the lamp error detection does not function.

Scaler Ver *.**.**

Reset 0

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.

Adjustment Process menu

LC-20S4E

Hotel mode = "0"

Hotel mode 0

EXT CONTROL OFF

Hotel mode = "1"

Hotel mode 1

Power on fixed **

Maximum volume **

Volume fixed **

Volume fix level **

RC button **

Panel button **

Menu button **

On Screen Display **

Input mode start **

Input mode fixed **

EXT CONTROL OFF

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 the Adjustment Process mode and turn of f 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.

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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.

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.

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"

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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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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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