Sharp LC-20S5H Schematic

1st Edition

LC-20S5H/M/X

SERVICE MANUAL

LCD COLOUR TELEVISION

MODELS

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

» PUBLIC MODE SETTING PROCEDURE ..................................................................................................16

» TROUBLE SHOOTING TABLE ..................................................................................................................23

» BLOCK DIAGRAM......................................................................................................................................26

» OVERALL WIRING DIAGRAM ...................................................................................................................28

» DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................30

» SCHEMATIC DIAGRAM

ËINVERTER Unit .......................................................................................................................................31

ËMAIN Unit.................................................................................................................................................32

ËSUB Unit ..................................................................................................................................................42

ËOPERATION Unit.....................................................................................................................................48

ËR/C, LED Unit ..........................................................................................................................................49

» PRINTED WIRING BOARD ASSEMBLIES................................................................................................50

» REPLACEMENT PARTS LIST....................................................................................................................65

» PACKING OF THE SET..............................................................................................................................77

LC-20S5H/M/X

Page

SHARP CORPORATION

LC-20S5H/M/X

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:

IMPORTANT SERVICE SAFETY PRECAUTION

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 110~240 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-20S5H/M/X

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-20S5H/M/X

SPECIFICATIONS

ITEMS

LCD panel 20" (50 cm) Advanced Super View & BLACK TFT LCD Number of pixels Video colour systems World multi system

TV Standard (CCIR) PAL: B/G, I, D/K NTSC: M SECAM: B/G, D/K TV Tuning System Auto preset tuning

function STEREO/BILINGUAL NICAM-B/G, I, D/K A2 stereo-B/G

AUTO PRESET Yes

CATV S1~S41 ch. Hyper Band 4-LINE DIGITAL COMB FILTER Yes Brightness 430 cd/m Viewing angles Audio output 2.1 W ⋅ 2 Speakers 4 11 cm, 2 pcs.

INPUT1 AUDIO-IN, COMPONENT-IN

INPUT2

Terminals INPUT3 AUDIO-IN, VIDEO-IN/AUDIO-OUT, VIDEO-OUT

Antenna DIN-Type

Headphone jack 3.5 mm ø jack (Front) OSD LANGUAGE English/Chinese/Arabic (Only for LC-20S5M/X) Power requirement AC 110–240 V, 50/60 Hz Power Consumption 64 W (0.7 W at Standby)

Weight Operating temperature

ËAs a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for the LCD TV set

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.

Display only 6.6 kg

Display with stand 7.3 kg

MODEL

921,600 dots VGA

H: 170° V: 170°

AUDIO-IN, VIDEO-IN, S-VIDEO-IN

0°C to +40°C

LC-20S5H/M/X

Upper control panel

VOL (Volume)

(–)/(+)

POWER

INPUT

CH (Channel)

( )/( )

Speaker

OPC (Optical Picture Control) indicator

The Optical Picture Control indicator lights up green when "OPC"

is set to "ON".

(Headphone) jack

Plug the headphone mini-plug into the headphone jack located

on the front of the LCD TV set.

POWER indicator

The POWER 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)

OPC sensor

Remote sensor

Part Names of the Main Unit

Controls

NOTE

• INPUT, CH (

)/(

), VOL (–)/(+) and MENU on 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.

To change the vertical angle of the LCD TV

set, tilt the screen up to 2.5 degrees forward

or 10 degrees backward. 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 your other hand.

How to adjust the angle

Terminals

How to Fix the Cables

Secure cables and cords with the supplied

cable clamps so that they do not get

caught when mounting the cover.

Pull down the

hook to open

the cover.

Carrying handle

Rear View

Round lock for Kensington

Security Standard slot

Using the Kensington Lock

• This LCD TV set has a Kensington

Security Standard slot for use

with a Kensington MicroSaver

Security System. Refer to the

information that came with the

system for instructions on ho

use it to secure the LCD TV set.

S-VIDEO

INPUT1

(COMPONENT)

Antenna terminal

VIDEO

AUDIO (L)

AUDIO (R)

INPUT2

VIDEO

AUDIO (L)

AUDIO (R)

INPUT3

AC INPUT

terminal

Cable clamps

How to Prevent the LCD TV Set from Falling Over

To prevent the LCD TV set from falling over in case of earthquakes and

so on, strap it onto the wall by threading one end of the string through the

loop

of the carrying handle (

)

and fastening the LCD TV set with the

string attached to the hook on the wall or the post, etc. (

(An example of strapping the LCD TV set onto the wall is shown below.)

• The string and hook are commercially available.

OPERATION MANUAL

LC-20S5H/M/X

SUBTITLE

Displays the Teletext

Subtitle directly.

HOLD

Temporarily holds the

current Teletext page.

DIS.MODE

(Mute)

Switches the sound on and off.

Yellow

Blue

Channel Select

TV input mode: Selects the channel.

Teletext mode: 0-9/Selects the page.

Displays the TV menu or returns

to normal screen.

VOL (+)/(

)

(Flashback)

Returns to the previous

channel.

Red, Picture Menu

Right/Left Selection

END

Returns to normal screen

in Telete xt mode.

RETURN

Returns to the previous screen.

TEXT

Displays the Teletext mode

screen.

Upwards/Downwards

Selection, Zoom display

function (Teletext mode)

POWER

MPX

Switches to the audio

mode.

REVEAL

Displays hidden information

such as solutions to riddles

and puzzles.

(Status Display)

Turns on the status display

when the menu is not

displayed.

SUBPAGE

Displays the Teletext

Subpage directly.

TIMER

Displays the Sleep timer

screen.

INPUT

Switches the input source

between INPUT1, INPUT2, INPUT3

and TV mode.

BACKLIGHT

Selects the brightness and

OPC of the display.

Green, Sound Menu

CH ( )/( )

TV input mode: Selects the channel.

Teletext mode: Selects the page.

ËLC-20S5H ËLC-20S5M/X

rt Names of the Remote Control

(Mute)

Switches the sound on and off.

DIS.MODE

INPUT

Switches the input source

between INPUT1, INPUT2, INPUT3

and TV mode.

Channel Select

Displays the TV menu or returns

to normal screen.

VOL (+)/(

)

(P. 9)

(Flashback)

Returns to the previous

channel.

MPX

Switches to the audio

mode.

Right/Left Selection

RETURN

Returns to the previous screen.

Upwards/Downwards

Selection

POWER

LANGUAGE

(Status Display)

Turns on the status display

when the menu is not

displayed.

BACKLIGHT

Selects the brightness and

OPC of the display.

TIMER

Displays the Sleep timer

screen.

CH ( )/( )

DIMENSIONS

LC-20S5H/M/X

475.8

432.5

403.1

117

310

482.8

300.8

Unit: mm

138.9

53.4 97.6

447

100

43.3

48.2

100

293.4

151

224

LC-20S5H/M/X

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

SC1701

SC2001

P3901

SC2003

SC1201

P7301

SC2002

P3902

Sub PWB

P3601

P6705

SC6701

P6703

P6702

P6701

SC3601

P4001

R/C,LED PWB

P3301

P6700

Inverter PWB

LC-20S5H/M/X

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 6 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-20S5H/M/X

» 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-20S5H/M/X

SC1701

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)

P4001

SC2003

SC4201

P3902

P3901

P3601

SC6701

SC1201

P7301

SC2002

SC3601

SC2001

» Precautions at the time of the side-B(back) service of main, sub and Inverter unit.

1. Remove only SC1701 of the FPC for connection between Main unit (SC1701) 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: 6 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 (SC1701)-LCD Panel (CN1)

» Other extension cable

Part No. Description QCNW-C461WJQZ Extension Cable 15-pin Main (SC1201)-Sub (P7301) QCNW-C461WJQZ Extension Cable 15-pin Main (SC2001)-Sub (P3901) QCNW-D402WJQZ Extension Cable 23-pin Main (SC2002)-Sub (P3902) QCNW-D444WJQZ Extension Cable 5-pin Operation (SC4201)-Main (SC2003) QCNW-D449WJQZ Extension Cable 13-pin Inverter (SC6701)-Sub (P3601) QCNW-E158WJQZ Extension Cable 14-pin R/C, LED (P4001)-Sub (SC3601)

LC-20S5H/M/X

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.

1. Preparations

(1) Plug the AC power cord directly into a wall outlet. [1] Adjustment procedure

1-1. Adjusting the checker

Turning on the power (initialization) → Making the model and size settings → Transferring the model-related data to the setting E2PROM (I2C)

1-2. Adjusting the finish process

Final assembling → Turning on the power → Calling the adjustment process mode (bus connector) → Adjust- ing the common bias, TAMP, and white balance (cut-off and gain) settings

[2] Calling the checker mode/adjustment process mode 2-1. Calling the checker mode * Keep KEY5 (pin (82) of microprocessor) at "L" and turn on the power.

KEY-4 KEY -5 Mode shift

H H Normal mode (Data is written and stored on EEP is brand-new.)

L H Shift to adjustment mode

Activated with the checker-oriented master ROM values (EEP still brand-new even after the checker mode) The EEP gets initialized and the microprocessor's master values are written. (Process-adjusted settings not reprogrammed)

2-2. Calling the adjustment process mode There are two ways to call this mode. * Turn on the power and press the "ADJUST PROCESS" key on the remote controller. * Keep KEY4 (pin (81) of microprocessor) at "L" and turn on the power. * For servicing: Hold down the INPUT key and VOL (–) key at once, and turn on the power switch.

("K" appears at the top left of the screen to indicate the inspection process mode.) → Press the CH (Ù) key and VOL (–) key at once. (The adjustment process mode screen shows up.) _ To quit, turn off the power. (Or turn off the power switch or turn off the remote controller.)

[3] Key operation in the adjustment process Basic operation Selecting the receiving channels *Using the CH (ù)/(Ù) keys, turn up and down an actual receiving channel.

Snap press: The channels are turned up and down one by one. Continuous press: The next receivable channel is searched.

*Various adjustments The items are adjusted one by one by selecting on the menu screen and using the cursor

key and VOL (+)/(–) keys. *With the CURSOR UP/DOWN keys, select an adjustment item. *Using the menu key, the adjustment items are selected one after another.

When the bottom item on a page is already selected and the menu key is pressed, the top item on the next page

is selected. *If any item on a page is selected and the preset key is pressed, the top item on the next page is selected.

Page 1 → Page 2 → Page 3 → Page 9 → Page 1 ... *If any item on a page is selected and the manual memory key is pressed, the top item on the same page is

selected. *Using the CURSOR LEFT/RIGHT keys and VOL (+)/(–) keys, turn up and down the setting of a selected item.

Hierarchical shift *When the ENTER key is pressed on any item other than I2C DATA on page 4, the setting page of the item shows

up. * To quit the setting page, press the front screen key.

[4] Initialization 4-1. Ground pins (81) and (82) of IC2001 (microprocessor) and turn on the power. 4-2. Make sure the screen size is set at 20 inches. 4-3. Make sure the model number is "A646AH".

(Adjustment Process Menu Page 1)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

0 1 2 3 4 4 6

MOD E L 6AAH4

INCH S IZE ERROR NO R ESE T PUBL I C MODE

OF OF

[5] 5-1. Model-by-model sending data

Separately published.

LC-20S5H/M/X

0 F FEXT CONTROL

5-2. ROM collection

Separately published.

[6] Adjustment 6-1. Common bias adjustment

1) Feed a built-in signal.

2) Apply the specified instrument at the center of the screen.

3) Observe the instrument output on an oscilloscope.

4) Adjust the "COM BIAS" setting on Adjustment Process Page 2 so that the peak-to-peak of the wave be minimized.

6-2. T AMP adjustment

1) Receive the standard colour bar signal.

2) See if the "Y" reading (maximum) on Adjustment Process Page 2 is within the range in the following table. If not, adjust the "NTSC T AMP" setting on the same page to have the "Y" reading (maximum) within this range.

Model LC-20S5H/M/X

Setting (PAL) 155~158

Reference (Adjustment Process Menu Page 2)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

0 1 2 3 4 5 6 7

COM B I A S

TAMP L

YDATA

TAMP H

NTSC TAMP PAL TAMP

SEC AM TAMP

45510

51 51

9 9 9

5 8 8

0 0 0

Y Data

(White 75%)

LC-20S5H/M/X

6-3. White balance adjustment

1) Adjustment procedure Adjust the RGB CUTOFF2 setting for white 40% first and then the RGB-GAIN setting for white 80%. (1) Adjusting the test signal

[Input signal] White 80% (191 gradations) for the left of screen, and white 40% (92 gradations) for the right. [Specification] RGB CUTOFF2 and RGB-GAIN settings on Adjustment Process Page 3. Adjustment spec. Inspection spec. White 80% x 0.264 0.004 0.01 Radius from the center

White 40% x 0.274 0.002 0.01 Radius from the center [Adjusting with the bus]

Gain (RGB-GAIN): Cut-off (RGB CUTOFF2) (Reading with Minolta CA-210)

[7] Factory settings 7-1. Making factory settings

Use the adjustment remote controller for the factory settings.

1) Hold down the remote controller's FACTORY SETTING key.

2) Several seconds later, "SETTING COMPLETE" appears at the center of the screen. Now the settings are complete.

y 0.273 0.004 0.01 Radius from the center y 0.279 0.002 0.01 Radius from the center

Fix the G setting at "0". Vary the R and B settings accordingly. Adjustment range: ±40

: Reduce the two strong colours

Adjustment range: Down to -40

SETTING COMPLETE

LC-20S5H/M/X

TEST PATTERN IN THE ADJUSTMENT PROCESS MODE

IC1201 (LCD controller) test pattern

1) Getting the test pattern displayed Call the adjustment process mode, select "DVP" on page 4, and press the ENTER button. Next select "DVP TEST PATTERN" in line 2 on page 1. (The "DVP TEST PATTERN" turns yellow.) Now use the cursor RIGHT/ LEFT keys to get the test pattern displayed. To quit the test pattern, enter "0" in the "DVP TEST PATTERN" setting. The test pattern is kept onscreen even by pressing the RETURN UP/DOWN buttons. The test pattern display is cancelled when the power is turned off, and the usual display appears instead when the power is turned on again.

2) Test pattern displayed The following test pattern appears onscreen.

» The DVP test pattern comes in 22 different types.

Black & white (Size:Minimum)

2 Black & white (Size:Small) 3

Black & white (Size:Medium)

4 Black & white (Size:Large) 5

Crosshatch (Spacing:Minimum)

Crosshatch (Spacing:Small)7 Crosshatch (Spacing:Medium)8 Crosshatch (Spacing:Large)9 Colour bar (Spacing:Minimum)

Colour bar (Spacing:Medium)

Vertical lamp (Spacing:Medium)

Colour bar (Spacing:Large)

Black-background pattern

13 Lamp (Spacing:Small) 14

18 White 100% 19

Lamp (Spacing:Medium)

White 50%

10 Colour bar (Spacing:Small)

Vertical lamp (Spacing:Small)

20 Red-background pattern

21 Green-background pattern 22

Blue-background pattern

LC-20S5H/M/X

PUBLIC MODE SETTING PROCEDURE

1. How to start Public Mode

» There are the following two ways to get the public mode setup screen displayed.

1 In the adjustment process mode, turn on "PUBLIC MODE". Also press the "CH (ù)" and "VOL (+)" keys on

the set at once and turn on the power.

2 1) Press the "INPUT" and "VOL (+)" keys on the set at once and turn on the power.

2) Get the password input screen displayed.

Procedure

» The input starts with the leftmost digit. » Use the numeric keys [1] thru [9] and [10/0] keys on the remote con-

troller. The other keys are not acceptable.

» With a numeric-key input, "–" will change to " ". The input position

will move one digit to the right.

» With all the 3 digits entered, the password will be verified.

3) The 3-digit password is now verified. The password [0] [2] [7] provides for the public mode screen. (This screen comes on with whatever adjustment process settings.) With any other passwords, the screen changes to the normal mode.

LC-20S5H/M/X

2. How to exit Public Mode

There are the following ways to quit the public mode setup screen. » Turn off "PUBLIC MODE" in the adjustment process mode. (✩) ← This way alone is not for quitting the setup

screen, but for quitting the mode itself.

» Turn off the power with the "POWER" key. (★) » Select "ENTER". (★) » Move the cursor to "RESET" and press the "FLASHBACK" key. (Back to the normal mode screen)(✩)

★ ... "PUBLIC MODE" stays on in the adjustment process mode. ✩ ... The settings will be back to the factory ones.

3. Public Mode Setting Values

» With the factory settings made, the public mode settings get initialized. (The adjustment process remains intact.)

4. Public Mode Menu

The guidance is not displayed onscreen. Setup procedure

» To move the cursor up and down, use the "cursor UP/DOWN" key (remote controller) and "CH (ù)/(Ù)" key

(remote controller and set).

» To change the settings, use the "cursor RIGHT/LEFT" key (remote controller) and "VOL (+)/(–)" key (remote

controller and set).

» To save new settings, keep the cursor at "Enter" and use the "cursor RIGHT/LEFT" key (remote controller) and

"VOL (+)/(–)" key (remote controller and set).

Public mode Power on fixed [Variable ] Maximum volume [ 60 ] Volume fixed [Variable ] Volume fixed level [ 20 ] RC button [Respond ] Panel button [Respond ] Menu button [Respond ] On screen display [Yes ] Input mode start [Normal ] Input mode fixed [Variable ] Sound only mode [No ] Reset Enter

LC-20S5H/M/X

5. On Setting Items

* "EZ-SETUP" discussed below indicates "EZ-SETUP after the first power-on". (1) POWER ON FIXED

Selection Default Explanation

Limit in Setting Exception Remarks

(2) MAXIMUM VOLUME

Selection Default Explanation Limit in Setting

Exception

Remarks

Selection between

"Variable" and "Fixed" (loop provided)

– (Variable) In

"Fixed" setting, the power-off by the power key of the unit is invalidated and the image is kept being

received. The power can be turned off by stopping the power supply from AC. Refer to the

"Power-On Fixed" sheet.

None

» Selection of "FIXED" depends on use of STB etc. » In "Variable" setting, the power operation is in wait for 1 sec. and then turned off when the main power

switch is off.

» Display ON/OFF in hotel menu is controlled by adjustment process "HOTEL POWERFIX".

Adjustment from 1 to 60 (no loop) 60 Sound volume can not be adjusted higher than the preset value.

» When the sound volume is set lower than 59, only figures are displayed and the sound volume bar is not

displayed.

» The maximum sound volume for ON-timer (Wake up timer) is limited also to the preset value. » In the item "VOLUME" of adjustment process, the sound volume can be set freely irrespective of this

setting.

» Setting is valid only for the speakers of the unit. (As for the headphone, the sound volume can be set up

to 60 irrespective of the limit.)

» In line output (sound volume variable), the sound volume can be adjusted from -60 to 0 irrespective of

pre-adjusted value.

» When the sound volume is set higher than the MAX setting by the adjusting process or headphone, the

sound volume control operation is prohibited for turn-up and the sound volume should be turned down to MAX in this state.

(3) VOLUME FIXED

Selection Default Explanation Limit in Setting

Exception

Remarks

Selection between "Variable" and "Fixed" (loop provided) Variable Sound volume is fixed and made invariable.

» The sound volume for the ON-timer (Wake up timer) is fixed also without display of menu. Besides, the

» The following keys become invalid:

» In the item "VOLUME" of adjustment process, the sound volume can be set freely irrespective of this

» In "Variable" setting, the sound volume had been conventionally set at 1 but this operation has been

» The sound volume for the ON-time is not set at 1 either and the sound volume set value of the ON-timer

» Setting is valid only for the speakers of the unit. (As for the headphone, the sound volume can be set up

» In line output (sound volume variable), the sound volume can be adjusted from -60 to 0 irrespective of

» As for sound volume fixing and sound volume MAX level, the sound volume fixing has priority. » Once the sound volume has been changed by adjustment process or headphone, it should be set back to

setting is made impossible. (Basically, the menu is not displayed.)

» Sound volume Up/Down (VOL +/-) [for both remote control and the unit] » Mute (MUTE)

setting.

abolished (and follows the last memory).

before executing the hotel mode is held.

to 60 irrespective of the limit.)

pre-adjusted value.

the sound volume preset by sound volume fixing level when the adjustment process ends or when the headphone is removed.

(4) VOLUME FIXED LEVEL

Selection Default Explanation Limit in Setting Exception Remarks

Adjustment from 1 to 60 (no loop) 10 The sound volume to be fixed by None None Setting is valid only when This must be confirmed actually by changing also the sound volume in accordance with setting.

(5) R/C BUTTON

Selection Default Explanation Limit in Setting

Exception

Remarks

Selection between Respond Keys acceptable by remote control are limited or reception of keys can be prohibited. 1In

"limited" setting, only power ON/OFF, sound volume '", tuning '" and BACKLIGHT (brightness

sensor) are accepted.

2In

"No respond" setting, all the keys (including the power key) are not accepted.

» Adjustment process, factory setting, inspection process and hotel only keys are valid irrespective of set-

ting.

» All the keys can be used in adjustment process, inspection mode and hotel menu irrespective of setting. » All the keys can be used also in the initial EZ-Setup after power-ON irrespective of setting.

LC-20S5H/M/X

"Volume fixed" is determined.

"Volume fixed" is selected for "fixed".

"Respond", "Limited" and "No respond" (loop provide)

(6) PANEL BUTTON

Selection Default Explanation Limit in Setting Exception

Remarks

Selection between Respond All the operations by keys (except the power key) of the unit can be invalidated.

» Inspection mode and hotel menu mode can be started irrespective of setting. » All the keys can be used in adjustment process, inspection mode and hotel menu irrespective of setting. » In U.S.A model, all the keys can be used also in the initial EZ-Setup after power-ON irrespective of

setting.

(7) MENU BUTTON

Selection Default Explanation

Limit in Setting

Exception

Remarks

Selection between Respond In unit are invalidated.

» ON-timer (Wakeup Timer) is turned OFF. » The following keys become invalid.

Wake-up timer and clock setting keys and all of the direct change keys to menu display

» Inspection mode and hotel menu mode can be started irrespective of setting. » All the keys can be used in adjustment process, inspection mode and hotel menu irrespective of setting. » All the keys can be used also in the initial EZ-Setup after power-ON irrespective of setting.

"Respond" and "No respond" (loop provide)

"No respond" setting, the menu operation by the menu key of the remote control and the menu key of the

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