SHARP LC20B8US, LC-20B9U-S, LC-20B9U Service Manual

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

SERVICE MANUAL

S45H7LC20B9US

LCD COLOR TELEVISION

LC-20B8U-S LC-20B9U-S

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 ........................................................................................................................................5

» OPERA TION MANUAL .................................................................................................................................6

» DIMENSIONS ...............................................................................................................................................8

» REMOVING OF MAJOR P ARTS ........................................................................................................ ..........9

» ADJUSTING PROCEDURE OF EACH SECTION .....................................................................................13

» PUBLIC MODE SETTING PROCEDURE .................................................................................................. 23

» TROUBLE SHOOTING TABLE ..................................................................................................................29

» MAJOR IC INFORMATION.........................................................................................................................34

» BLOCK DIAGRAM......................................................................................................................................42

» OVERALL WIRING DIAGRAM ...................................................................................................................44

» DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................46

» SCHEMATIC DIAGRAM

ËR/C, LED Unit ..........................................................................................................................................47

ËMAIN Unit.................................................................................................................................................48

ËSUB Unit ..................................................................................................................................................72

ËPOWER Unit ............................................................................................................................................76

ËINVERTER Unit .......................................................................................................................................86

» PRINTED WIRING BOARD ASSEMBLIES................................................................................................88

» REPLACEMENT PARTS LIST..................................................................................................................109

» PACKING OF THE SET............................................................................................................................127

LC-20B9U-SM

Page

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-20B8U-S

LC-20B9U-S LC-20B9U-SM

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 ONL Y WITH SA ME

A V

TYPE F6701 (6.3A, 250V) AND F7701 (3.15A, 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, and connect the DC power cable into the receiver's DC jack. (Do not use an isolation transformer for this test).

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.75V peak (this corresponds to 0.5 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

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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

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"

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Replacement Parts Lists

and

LC-20B8U-S

LC-20B9U-S LC-20B9U-SM

PRECAUTIONS A PRENDRE LORS DE LA REPARATION

Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants.

AVERTISSEMENT

• Utiliser un voltmètre CA d'une sensibilité d'au moins 5000Ω/V pour mesurer la chute de tension en travers

1. N'entreprendre aucune modification de tout circuit. C'est dangereux.

2. Débrancher le récepteur avant toute réparation.

PRECAUTION: POUR LA PROTECTION CONTINUE CONTRE LES RISQUES D'INCENDIE, REMPLACER LE

A V

FUSIBLE P AR UN FUSIBLE DE MEME TYPE F6701 (6.3A, 250V), F7701 (3.15A, 250V).

de la résistance.

• Toucher avec la sonde d'essai les pièces métalliques exposées qui présentent une voie de retour au châssis (antenne, coffret métallique, tête des vis, arbres de commande et des boutons, écusson, etc.) et mesurer la chute de tension CA en-travers de la résistance. T outes les vérifications doivent être refaites après avoir inversé la fiche du cordon d'alimentation. (Si nécessaire, une prise d'adpatation non polarisée peut être utilisée dans le but de terminer ces vérifications.) Tous les courants mesurés ne doivent pas dépasser

0.5 mA.

VERIFICA TIONS CONTRE L'INCEN-DIE ET LE CHOC ELECTRIQUE

Avant de rendre le récepteur à l'utilisateur, effectuer

Dans le cas contraire, il y a une possibilité de choc électrique qui doit être supprimée avant de rendre le récepteur au client.

les vérifications suivantes.

1. Inspecter tous les faisceaux de câbles pour s'assurer que les fils ne soient pas pincés ou qu'un outil ne soit pas placé entre le châssis et les autres pièces métalliques du récepteur.

2. Inspecter tous les dispositifs de protection comme les boutons de commande non-métalliques, les isolants, le dos du coffret, les couvercles ou blindages de réglage

DVM

ECHELLE CA

1.5k ohm 10W

et de compartiment, les réseaux de résistance-capacité, les isolateurs mécaniques, etc.

3. S'assurer qu'il n'y ait pas de danger d'électrocution en vérifiant la fuite de courant, de la facon suivante:

• Brancher le cordon d'alimentation directem-ent à une

0.15 µF

SONDE D'ESSAI

prise de courant de 110-240V. (Ne pas utiliser de transformateur d'isolation pour cet essai).

• A l'aide de deux fils à pinces, brancher une résistance de 1.5kΩ 10 watts en parallèle avec un condensateur de 0.15µF en série avec toutes les pièces métalliques exposées du coffret et une terre connue comme une

AUX PIECES METALLIQUES EXPOSEES

BRANCHER A UNE TERRE CONNUE

conduite électrique ou une prise de terre branchée à la terre.

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AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans les téléviseurs présentent des caractéristiques spéciales relatives à la sécurité, qui ne sont souvent pas évidentes à vue. Le degré de protection ne peut pas être nécessairement augmentée en utilisant des pièces de remplacement étalonnées pour haute tension, puissance, etc. Les pièces de remplacement qui présentent ces caractéristiques sont identifiées dans ce manuel; les pièces électriques qui présentent ces particularités sont

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identifiées par la marque " å " et hachurées dans la liste des pièces de remplacement et les diagrammes schématiques. Pour assurer la protection, ces pièces doivent être identiques à celles utilisées dans le circuit d'origine. L'utilisation de pièces qui n'ont pas les mêmes caractéristiques que les pièces recommandées par l'usine, indiquées dans ce manuel, peut provoquer des électrocutions, incendies, radiations X ou autres accidents.

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Precautions for using lead-free solder

1 Employing lead-free solder

"All 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

SPECIFICATIONS

Items

LCD panel 20" Advanced Super View & BLACK TFT LCD Number of dots 2,359,296 dots XGA Video color systems N358, N443, PAL, PAL-M, PAL-N, SECAM, PAL-60

TV Standard (CCIR) NTSC/PAL-M/PAL-N

TV function

TV Tuning System PLL 181 ch. STEREO MTS+SAP CATV 125 ch.

Y/C FILTER 3D Y/C FILTER Brightness

Viewing angles H: 170° V: 170° Audio amplifier 2.1 W × 2 Speakers ø2.0 in. (ø5.0 cm), 2 pcs.

INPUT1 AUDIO-IN, COMPONENT-IN INPUT2 AUDIO-IN, COMPONENT-IN INPUT3 AUDIO-IN, VIDEO-IN, S-VIDEO-IN

Terminals INPUT4/OUTPUT AUDIO-IN, VIDEO-IN/AUDIO-OUT, VIDEO-OUT

INPUT5 PC Connector: 15-pin mini D-sub PC AUDIO: Mini-jack for stereo (ø3.5 mm) Antenna F-Type Headphone Mini-jack for stereo (ø3.5 mm)

OSD language English/Spanish/French Power supply AC 110-240V, 50/60Hz Power consumption 81 W (0.6 W standby): AC 120V Weight 19.4 lbs. (8.8 kg), w/o accessories

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

some

deviations from these values in individual units.

Model

LC-20B8U/LC-20B9U

480 cd/m

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

LC-20B8U-S

Part Names of the Main Unit

Controls

• 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.

Headphone jack (

)

Plug the headphone mini-plug into the headphone

jack located

on the front of the main unit.

OPC (Optical Picture Control)

sensor

Remote sensor

OPC (Optical Picture Control) indicator

The OPC indicator lights up green when "OPC" is

set to "ON".

POWER/WAKE UP TIMER indicator

POWER/WAKE UP TIMER 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), and orange when the wake-

up timer is set (the indicator will light when in the standby mode).

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 12 degrees to right and

left. Please adjust the angle so that the LCD

TV set can be watched most comfortably.

POWER

Upper control panel

INPUT

CH (Channel) (

)/(

)

VOL (Volume)

(–)/(+)

Speaker

Tilt the display by grabbing onto the

carrying handle while securely holding

down the stand with your other hand.

How to adjust the angle

Listening with Headphones

ËPlug

the headphone mini-plug into the headphone jack located on the front of the main unit.

• 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.

Ë On-screen display

VOLUME

Adjust

the sound volume

using VOL

(

)/(

–

) on

the

remote

control.

Headphones

Speaker

Terminals

)

(

Carrying handle

Rear View

AUDIO (L)

AUDIO (R)

AUDIO (L)

AUDIO (R)

AUDIO

ANALOG RGB

S-VIDEO

AUDIO (L)

AUDIO (R)

VIDEO

AUDIO (L)

AUDIO (R)

VIDEO

INPUT2

(COMPONENT)

ANT

(Antenna terminal)

AC INPUT

(AC 110-240 V)

INPUT5

(PC-IN)

INPUT4/

OUTPUT

INPUT1

(COMPONENT)

INPUT3

Round lock for

Kensington Security

Standard slot*

)

(

How to Fix the Cables

• Secure cables and cords with the supplied cable clamp so that they do not get caught when mounting the cover.

Cable clamp

Pull down the hook

to open the cover.

* 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 how to use it to

secure the LCD TV set.

LC-20B9U-S LC-20B9U-SM

OPERATION MANUAL

Part Names of the Remote Control

DISPLAY

Displays the receiving channel and

the current time for 10 seconds.

AV MODE

Selects preferred AV MODE.

BACKLIGHT

Adjusts the brightness of the screen.

' /" /\/| (Cursor control)

Selects a desired item on the screen.

Displays the menu screen.

INPUT

Switches the input source between

INPUT1, INPUT2, INPUT3, INPUT4,

INPUT5 (PC) and TV mode.

Displays Closed Caption subtitles.

FLASHBACK

Returns to the previous channel.

CH (

)/(

)

Selects a channel.

Channel Select

Sets the channel.

POWER

Switches the Liquid Crystal

Television power on or standby.

PIC.FLIP

Sets the orientation of the picture.

SLEEP

Sets the sleep timer.

MENU RETURN

Returns to the previous screen.

ENTER

Executes a command.

MUTE

Mutes the sound.

AUDIO ONLY

Outputs audio without screen image.

VOL (+)/(–)

Sets the volume.

MTS

Selects audio settings.

TV Signals in Your Region

This product is factory set to comply with the TV broadcasting system in the United States. For Brazil, Argentina and Uruguay,

set the color system according to the country before using this product by following the table below.

U.S.A.

Color: NTSC NTSC (N358) NTSC (N358)

TV ch: US ch US ch US ch

Not required or N/A

Canada, Mexico, Color: NTSC NTSC (N358) NTSC (N358)

Latin America TV ch: US ch US ch US ch

Not required or N/A

Brazil

Color: PAL-M NTSC (N358) NTSC (N358) Set color system to

TV ch: US ch US ch US ch PAL-M

Argentina, Color: PAL-N NTSC (N358) NTSC (N358) Set color system to

Uruguay TV ch: US ch US ch US ch PAL-N

• The 3 Dimensional Y/C separation circuit* only works when the color system is set to N358 in TV mode and Video mode.

* The 3 Dimensional Y/C separation circuit is used to remove flickering and color bleeding.

* The 3 Dimensional Y/C separation circuit does not function when S-VIDEO or COMPONENT signals are input.

broadcasting

system

Factory setting of color system User setting

TV Video TV/Video

Country

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.

Open the battery cover.

Insert two "AAA" size batteries.

Close the battery cover.

Ë Place batteries with their

terminals corresponding

to the (+) and (–)

indications in the battery

compartment.

Caution!

Precautions regarding batteries

Ë Improper use of batteries can result in a leakage of chemicals and/or explosion. Be sure to follow the instructions below.

• Place batteries with their terminals corresponding to the (+) and (–) indications.

• 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 due to storage conditions.

• If the remote control is not to be used for a long period of time, remove the batteries from the remote control.

Preparation

Ë Engaging the lower

claw with the remote

control, close the

cover.

Using the Remote Control

Ë 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.

Cautions regarding use of the remote control

Ë 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.

Ë Do not install or place the remote control in direct sunlight. The

heat may cause deformation of the unit.

Ë The remote control may not work properly if the remote sensor

window is in direct sunlight or strong lighting. In such a case,

change the angle of the lighting or main unit, or operate the

remote control closer to the remote sensor window.

Ë Slide the cover while

pressing the (

) part.

Headphone jack

OPC indicator

POWER/WAKE UP TIMER

indicator

Remote sensor

OPC sensor

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

DIMENSIONS

1319/32(345)

/64(444)

/8(638)

Unit: inch (mm)

/32(134)

/8(92)211/16(68)

(443)

/ 17

(100)

/ 3

/64(410.5)

(389)

(308.4)

(54)

315/16(100)

(45)

(256)

/32(242)

(413)

)(

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 terminal screws (4 pcs.).

6. Remove the cabinet B fixing screws (9 pcs.).

7. Remove the cabinet B after opening from the direction of an arrow.

8. Remove the stand angle fixing screws (5 pcs.).

9. Disconnect all the connectors from all the PWBs.

Cabinet B

Cabinet A

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Carrying Handle

Stand Angle

Stand Cover

Stand

Terminal Cover

Power PWB

Inverter PWB

P6702

P6703

SC7701

Sub PWB

SC3402

P6704

R/C, LED PWB

P6705

P6706

P6707

SC2003

SC7702

SC4001

P7705

SC2004

SC1201

SC2001

Main PWB

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

10. Remove the inverter PWB fixing screws (3 pcs.).

11. Remove the power PWB fixing screws (6 pcs.).

12. Remove the sub PWB fixing screws (4 pcs.).

13. Remove the chassis frame fixing screws (3 pcs.).

14. Remove the R/C, LED PWB fixing screws (2 pcs.).

15. Remove the main PWB fixing screws (4 pcs.).

16. Remove the 4 lock screws each from the right and left speakers and take out both the speakers.

Inverter PWB

Speaker (R)

Power PWB

Sub PWB

Chassis Frame

Speaker (L)

R/C, LED PWB

Main PWB

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

» Precautions in handling the LCD panel

1. Handle it in a clean room. (above 50% humidity)

2. The worker must wear an earth band.

3. Be careful not to drop, vibrate and shock the panel.

4. Use an ionizer. (within 30 cm)

17. Remove the three lock screws from the LCD panel, and detach the LCD panel unit.

18. Remove the prism sheet (H), (V), diffusion sheet and diffusion plate.

19. Remove the lamp unit from the lamp holder (top). Then detach the (bottom)-left and (bottom)-right lamp holders.

20. Remove the reflection sheets (top) and (bottom) from the back shield.

Back Shield

Reflection Sheet (Top) (PSHEPA205WJZZ)

Lamp Holder (Bottom)-Left (LHLDZA368WJKZ)

Lamp Unit, x6 (KLMP-A034WJZZ)

Lamp Holder (Top), x2 (LHLDZA365WJKZ)

(PSLDMA653WJFW)

Diffusion Sheet (PSHEPA204WJZZ)

Prism Sheet (H) (PSHEPA203WJZZ)

20" LCD Panel Unit

Lamp Holder (Top), x2 (LHLDZA365WJKZ)

Diffusion Plate (PCOVUA035WJZZ)

Prism Sheet (V) (PSHEPA208WJZZ)

Reflection Sheet (Bottom) (PSHEPA206WJZZ)

Lamp Holder (Bottom)-Right (LHLDZA367WJKZ)

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

»Precautions in servicing the side-B (backside) of the main PWB unit

1. Disconnect the FFC for connection between the main PWB (SC1201) and LCD panel (CN1), and then connect the service-specific extension FFC (flat cable) (QCNW-C458WJQZ).

2. Disconnect the SC2001 side of the lead from between the main PWB (SC2001) and the sub PWB (P3401), and then connect the service-specific extension cord (QCNW-D402WJQZ).

3. Disconnect the SC2003 side of the lead from between the main PWB (SC2003) and the power PWB (P7703), and then connect the service-specific extension extension cord (QCNW-C461WJQZ).

4. Disconnect the SC2004 side of the lead from between the main PWB (SC2004) and the power PWB (P7702), and then connect the service-specific extension cord (QCNW-D402WJQZ).

5. Remove the lock screws (4pcs.) from the main PWB, detach the PWB from the chassis frame, and then turn it over to service.

»Precautions in servicing the Chip Parts side (backside) of the inverter PWB unit

6. Disconnect the SC7701 side of the lead from between the power PWB (SC7701) and the inverter PWB (P6701), and then connect the service-specific extension cord (QCNW-C460WJQZ).

7. Remove the lock screws from the inverter PWB and then turn it over to service.

»Precautions in servicing the Chip Parts side (backside) of the power PWB unit (main/sub PWB)

8. Disconnect the SC7701 side of the lead from between the power PWB (SC7701) and the inverter PWB (P6701), and then connect the service-specific extension cord (QCNW-C460WJQZ).

9. Remove the PWB fixing screws (main unit: 4 pcs., sub unit: 4 pcs., power unit: 6 pcs.)

Power PWB Sub PWB

Inverter PWB

(Backside)

Inverter PWB

P6701 SC7701

P7702

Power PWB (Backside)

SC2003

SC2004

SC1201

Main PWB (Side-B)

Sub PWB

P3401P7703

SC2001

CN1

Main PWB

Step Part No. Description

1 QCNW-C458WJQZ

Extension Cable 80-pin Main (SC1201)-LCD Panel (CN1) 2 QCNW-D402WJQZ Extension Cable 23-pin Main (SC2001)-Sub (P3401) 3 QCNW-C461WJQZ Extension Cable 15-pin Main (SC2003)-Power (P7703) 4 QCNW-D402WJQZ Extension Cable 23-pin Main (SC2004)-Power (P7702)

6, 8 QCNW-C460WJQZ

Extension Cable 19-pin Power (SC7701)-Inverter (P6701)

ADJUSTING PROCEDURE OF EACH SECTION

1. Preparations before adjustment

(1) Keep the AC power cable directly plugged in a wall outlet.

AC110V~240V

[1] Adjustment procedures 1-1. Adjusting the checker

Power on (initialization) → Setting the model number and screen size

1-2. Finishing process adjustments

Assembling → Power on → Adjustment process mode (bus connector) → AD converter level, common bias, TAMP and white balance (cut-off and gain) adjustments

[2] Entering the checker mode/adjustment process mode 2-1. Calling the checker mode * Keep KEY-5 (pin (82) of microprocessor) at "L" level and turn on the power.

KEY-4 KEY-5 Mode shift

H H Normal mode (Fresh data written and saved on EEPROM)

L H Shift to adjustment process mode

Operation with master ROM settings in the checker mode (EEPROM still brand-new after the checker mode) EEPROM initialized and microprocessor's master settings written (process adjustment values not yet written)

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

2-2. Calling the adjustment process mode There are two ways to call this mode. * Keep KEY-4 (pin (81) of microprocessor) at "L" level and turn on the power. * For servicing:1 Hold down the "INPUT" and "VOL (–)" keys at once, and turn on the power switch. ("K" appears

at the top left onscreen to indicate that the checker mode is on.) → 2 Press the "CH (Ù)" and "VOL (–)" keys at once. (The adjustment process mode screen shows up.) switch on the set or the remote controller).

[3] Key operation ËBasic operation *Using the "CH (ù)/(Ù)" keys, select a receiving channel. *Using the "INPUT" key, select an input. *Using the "cursor up/down keys, select an adjustment item. (When the "cursor down" key is pressed at the bottom

item of a page, the top item on the next page will be selected. When the "cursor up" key is pressed at the top item

of a page, the bottom item on the previous page will be selected.) *Using the "VOL (+)/(–)" or "cursor right/left" keys, adjust the selected item. *Press the "MENU" key, and the next item will be selected. (When the "MENU" key is pressed at the bottom item

of a page, the top item on the next page will be selected.) ËHierarchical shift

*Press the "ENTER" key on any item other than I2C DATA on Page 9, the setting page of the item will show up. *To quit the setting page, press the "FLASHBACK" key.

.....

T o quit the mode, turn of f the power (using the power

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

[4] Initialization 4-1. Connect both pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power. 4-2. Make sure the model number "A628" is selected. *Note: This setting cannot be changed. 4-3. Make sure "20" (inches) is selected for the screen size. *Note: This setting cannot be changed.

(Onscreen display of adjustment process menu page 1)

0112 0 1 2 3 4 5 6 7 8

13S14E15T16 17 18 19 20 21 22A23

I I

[5] Adjustments 5-1. AD converter level adjustment 1 D3 input

1) Feed only the Y component of D3 75% color bar signal. Equipment used: LEADER LT446 Signal name: COLOR BAR 75% Setting: 01: 1920 x 1080 / 60i H: 33.72 kHz, V: 29.97 Hz

2) Turn on the AUTO GAIN-OFFSET1 item on adjustment process page 7.

2 PC input

1) Feed the VGA white 0% signal.

2) Turn on the AUTO OFFSET2 item on adjustment process page 8.

3) Feed the VGA white 100% signal.

4) Turn on the AUTO GAIN2 item on adjustment process page 8.

0 0

F 1

5-2. Common bias adjustment

1) Adjust the "COM BIAS" setting on adjustment process page 2 so that flickering gets to minimum. With the setting changed, the flicker check built-in test pattern will show up.

5-3. T AMP adjustment

1) Receive the 75% standard color bar signal in the TV input mode.

2) If the "YDATA" reading on adjustment process page 2 is not within the range in the table below, readjust the "NTSC TAMP" item on the same page and make sure the "YDATA" reading is as specified. * Note that the setting range may be different from model to model.

3) Then add 6 to the "NTSC TAMP" setting and enter this value for "PAL-M TAMP" and "PAL-N TAMP".

Model LC-20B8U LC-20B9U

Setting 155-158 155-158

Reference

0212

C T Y T N P P

O A D A

T A A

M M

S L L

T P C

H T

A T T

A A

P M M

P P

12 13 14 15 16 17 18 19 20 21

4 1 1 1

5 5 5 5 8 9 9

0 5 7 8 5 1 1

24 25 26 0 1 2 3 4 5 6 7 8

Y Data

(White 75%)

(Onscreen display of adjustment process menu page 2)

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

5-4. White balance adjustment

1) Adjustment procedure (Call the AV input mode with INPUT3 or INPUT4.) Adjust the RGB CUTOFF2 setting for the 40% white level, and the RGB-GAIN setting for the white 80% level. (1) Adjustment [Input signal] White 80% (191 gradations) and white 40% (92 gradations) signals [Adjustment value] RGB CUTOFF2 and RGB-GAIN settings on adjustment process page 3

Adjustment spec. Inspection spec.

White 80% x=0.291 ±0.006 ±0.012 Radius from center point

y=0.300 ±0.006 ±0.012 Radius from center point

(Reference brightness: 300 cd/m2)

White 40% x=0.276 ±0.006 ±0.012 Radius from center point

y=0.282 ±0.006 ±0.012 Radius from center point

(Reference brightness: 50 cd/m2)

Cut-off (RGB CUTOFF2)

: Fix the G setting at 0. Vary the R and B settings. Adjustable range ±30. Gain (RGB-GAIN): Reduce the settings of the two stronger colors. Adjustable range 0 to -70. (The values are based on the Minolta CA-210.)

[6] Factory settings 6-1. Hold down the "INPUT" and "VOL (–)" keys on the set at once, and turn on the power. Hold down the "CH (ù)"

and "VOL (+)" keys at once. ("SETTING COMPLETE" appears on the screen.) *Note: Immediately after the factory settings have been made, turn off the power switch. (The next time the power is turned on, the set gets started in the EZ SETUP mode. An extra key-in just after the factory setting may cause the set to malfunction.)

SETTING COMPLETE

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

6-2. Intial value of factory settings

MENU PICTURE AV MODE STANDARD/DYNAMIC/DYNAMIC(FIXED)/MOVIE/GAME DYNAMIC DYNAMIC DYNAMIC DYNAMIC DYNAMIC

AUDIO TREBLE -10 ~ +10 0

SETUP CH-SETTING YES/NO

OPTION (TV) (INPUT1) (INPUT2) (INPUT3) (INPUT4)

OPC

BACKLIGHT

CONTRAST BRIGHTNESS COLOR -30 ~ +30 TINT -30 ~ +30 SHARPNESS -10 ~ +10

ADVANCED COLOR TEMP. USER/HIGH/MIDDLE/LOW MIDDLE

RESET

BASS -10 ~ +10 0 BALANCE -10(L) ~ +10 (R) PC SOUND SELECT RESET YES/NO NO Always select "NO" to move to the setting screen.

MTS STEREO/SAP/MONO STEREO CLOCK SET

INPUT4 IN/OUT

V-CHIP BLOCK SECRET No. 4-DIGIT ENTRY CLEAR

CLOSED CAPTION

COLOR SYSTEM

PC SETTING

LANGUAGE ENGLISH/ESPANOL/FRANCAIS

VIEW MODE

AUDIO ONLY ON/OFF

BLUE SCREEN ON/OFF SLEEP TIMER WAKE UP TIMER

NO SIGNAL OFF

NO OPERATION OFF

POWER MANAGEMENT ON/OFF OFF

PICTURE FLIP NORMAL/MIRROR/ROTATE/UPSIDE DOWN NORMAL

RED GREEN 0 BLUE 0 I/P SETTING INTERLACE/PROGRESSIVE PROGRESSIVE NOISE CLEAN FILM MODE QUICK SHOOT ON/OFF ON

RESET

EZ-SETUP

AIR/CABLE AIR/CABLE AIR CH SEARCH CH MEMORY

TIME DISPLAY

MPAA G

TV GUIDELINES TV-Y

CAN.ENGLISH RATINGS

CAN.FRENCH RATINGS G NONE

STATUS ON/OFF OFF

INPUT SIGNAL FINE SYNC. H-POS. -30 ~ +30 0

TIMER ON/OFF TIME 12 : 00AM~11 : 59PM 12 : 00AM CHANNEL VOL. 0~60 20

LANGUAGE ENGLISH/ESPANOL/FRANCAIS CH SETTING ON/OFF ON AUTO CLOCK ON/OFF ON START

AUTO AUTO/[2]~[69] or [1]~[125] AUTO MANUAL DST

PG NONE PG-13 R NC-17 X

TV-Y7 NONE TV-G TV-PG (NONE)/BLOCK TV-14 (NONE)/BLOCK NONE TV-MA (NONE)/BLOCK NONE BLOCK CONTENT (BLANK)/BLOCK BLANK (UN BLOCK)

C C8+ G PG NONE 14+ NONE 18+ NONE

8 ans+ NONE 13 ans+ NONE 16 ans+ NONE 18 ans+ NONE

V-POS. -15 ~ +15 0 CLOCK -15 ~ +15 0 PHASE -15 ~ +15 0 RESET NO Always select "NO" to move to the setting screen.

TIME 12 : 00AM~11 : 59PM 12 : 00AM The clock setting is yet to be made. Follow the display at left to move to the MANUAL CLOCK setting screen.

D L (BLANK)/BLOCK BLANK (UN BLOCK) S (BLANK)/BLOCK BLANK (UN BLOCK) V (BLANK)/BLOCK FV BLANK (UN BLOCK)

Setting ranges Initial values

ON/OFF OFF OFF

BRIGHT/NORMAL/DARK/VARIABLE VARIABLE VARIABLE

1 (DARK) ~ 9 (NORMAL) ~ 17 (BRIGHT)

0 ~ 60

-30 ~ +30

ON/OFF ON/OFF

YES/NO NO Always select "NO" to move to the setting screen. YES/NO NO Always select "NO" to move to the setting screen.

INPUT1~4/INPUT5 (PC)/TV

YES/NO YES

– –

AUTO/MANUAL

ON/OFF

ON/OFF ON

IN/OUT /OUT× IN

(NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK (NONE)/BLOCK

(BLANK)/BLOCK

(NONE)/BLOCK NONE

OFF/CC1/CC2/T1/T2 OFF

AUTO/N358/N443/PAL/PAL-M/PAL-N/SECAM/PAL60

(* N358/PAL-M/PAL-N IN TV MODE) N358 AUTO

1024×768 (60Hz)/800×600(60Hz)/ 800×600(56Hz)/640×480(60Hz)

YES/NO

4 : 3/16 : 9/ZOOM/STRETCH

OFF/30/60/90/120/150MIN OFF (CLEAR) Always select "OFF" to move to the setting screen.

CH1~125/INPUT1~INPUT4

ENABLE/DISABLE DISABLE ENABLE/DISABLE DISABLE

(TV) (INPUT1) (INPUT2) (INPUT3)

(Except PC) (PC)

(STANDARD) (DYNAMIC) (DYNAMIC (FIXED)) (MOVIE) (GAME) (PC)

17 17 17 7 30 40 40 30

0000 0 0000 0000

(Except PC) (PC)

OFF OFF

INPUT5 (PC)

YES

ENGLISH

– –

AUTO

OFF

NONE

NONE NONE NONE NONE NONE

NONE NONE

BLANK (UN BLOCK)

NONE NONE

(TV)

1024x768 (60Hz)

ENGLISH

OFF OFF

OFF

CH2

+5 +5 0

MIDDLE

0 0 0

(INPUT3) (INPUT4)

AUTO

(INPUT4)

4 : 34 : 34 : 34 : 34 : 3

9 30 0 0 0 0

17(BRIGHT)

– – – – –

(Items not on the menu) Initial values EZ SETUP AUTO START ON LAST CHANNEL LAST TV/INPUT TV FLASH BACK 2ch SKIP DATA_CATV ALL SKIP SKIP DATA_AIR ALL SKIP VOLUME 20 LINE OUT LEVEL (AT VAO) 0 EDS CH (FOR AUTO) NOT ESTABLISHED

HOTEL MODE POWER ON FIXED VARIABLE

MAXIMUM VOLUME VOLUME FIXED VARIABLE REMOTE CONTROL USER CONTROL MENU BUTTON ON SCREEN DISPLAY START MODE NORMAL INPUT MODE FIXED VARIABLE

2ch

RESPOND RESPOND RESPOND YES

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

LIST OF THE ADJUSTMENT PROCESS MODE MENU

For calling the adjustment process mode and keying in this mode, refer back to "ADJUSTING PROCEDURE OF EACH SECTION".

DEFAULT CHART OF ADJUSTMENT PROCESS 1ST HIERARCHICAL ITEMS

Page No. Item

BASIC SETTING

1 MODEL A628

INCH SIZE 20

ERROR NO RESET 0 PUBLIC MODE OFF V-CHIP 1 EXT CONTROL OFF ROM AND GAIBU VERSION NUMBERS DISPLAYED AT THE BOTTOM.

Initial

Value (Do not change other items than designated.)

MODEL NAME SELECTION CANNOT BE CHANGED. SCREEN SIZE SELECT (20-INCH AND USED FOR INITIALIZATION, NOT 13/15-INCH SETTINGS NOT MODIFIABLE FOR OTHER CASES. SWITCHABLE IN CASE OF DATA FOR OTHER CASES. DATA REWRITE DIFFERENT SYSTEMS) AND READJUSTMENT REQUIRED WHEN

LAMP ERROR COUNT AND RESET SEE THE LAMP ERROR DETECTION. HOTEL MODE SETTING NOT USED VCHIP LINE MUTE SETTING NOT USED BUS, UART OPEN NOT USED

Function

Response precautions on servicing

WHEN INITIALIZED.

VIDEO ADJUSTMENT

2 COM BIAS 410

TAMP L 155 YDATA —

TAMP H 158 NTSC TAMP 90 T AMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES. PAL-M TAMP 96 TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES. PAL-N TAMP 96 TAMP ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.

WHITE BALANCE ADJUSTMENT

1125I/750P AD ADJUSTMENT

7 AD9883 DATA 0

R CUTOFF2 0 RED CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT. G CUTOFF2 0 GREEN CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT. B CUTOFF2 0 BLUE CUT-OFF ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT. R-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT . G-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT. B-GAIN 0 WHITE BALANCE ADJUSTMENT 2 REFER TO METHOD OF ADJUSTMENT. RGB GAMMA 1 RGB γ COEFFICIENT SETTING NOT USED

AD9883 DATA WAIT WRITE AND READ EXECUTED NOT USED AUTO GAIN-OFFSET1 OFF AD R GAIN 140 AD G GAIN 140 AD B GAIN 140 AD R OFFSET 56 AD G OFFSET 56 AD B OFFSET 56 RGTAR A3 GGTAR A3 BGTAR A3 RGCAL — GGCAL — BGCAL — ROCAL — GOCAL — BOCAL —

COMMON BIAS ADJUSTMENT SEE THE ADJUSTMENT PROCEDURES.

—

Y LOWER LIMIT SETTING AT TAMP ADJUSTMENT DATA READ VALUE AT TAMP ADJUSTMENT Y UPPER LIMIT SETTING AT TAMP ADJUSTMENT

AD9883 DATA WRITE AND READ NOT USED

AD9883 GAIN AND OFFSET AUTO ADJUSTMENT OFF/RUN 1125I, 750P INPUT RED GAIN ADJUSTMENT 1125I, 750P INPUT GREEN GAIN ADJUSTMENT 1125I, 750P INPUT BLUE GAIN ADJUSTMENT 1125I, 750P INPUT RED OFFSET ADJUSTMENT 1125I, 750P INPUT GREEN OFFSET ADJUSTMENT 1125I, 750P INPUT BLUE OFFSET ADJUSTMENT 1125I, 750P INPUT RED GAIN ADJUSTMENT TARGET 1125I, 750P INPUT GREEN GAIN ADJUSTMENT TARGET 1125I, 750P INPUT BLUE GAIN ADJUSTMENT TARGET Y LEVEL, CHROMA CALCULATION DISPLAY Y LEVEL, CHROMA CALCULATION DISPLAY Y LEVEL, CHROMA CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY

NOT USED SEE THE ADJUSTMENT PROCEDURES. NOT USED

REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Page No. Item

PC AD ADJUSTMENT

8 AUTO GAIN2 OFF

AUTO OFFSET2 OFF PCAD R GAIN 100 PCAD G GAIN 100 PCAD B GAIN 100 PC INPUT BLUE GAIN ADJUSTMENT REFER TO METHOD OF ADJUSTMENT. PCAD R OFFSET 56 PCAD G OFFSET 56 PCAD B OFFSET 56

RGTAR E6 GGTAR E6 BGTAR E6 RGCAL — GGCAL — BGCAL — ROCAL — GOCAL — BOCAL —

TABLE OF VARIOUS SETTINGS

9 I2C DATA 0

I2C DATA WAIT WRITE AND READ EXECUTED NOT USED SOUND DVP TUNER OTHERS

Initial

Value (Do not change other items than designated.)

AD9883 GAIN AUTO ADJUSTMENT OFF/RUN AD9883 OFFSET AUTO ADJUSTMENT OFF/RUN

PC INPUT RED GAIN ADJUSTMENT PC INPUT GREEN GAIN ADJUSTMENT

PC INPUT RED OFFSET ADJUSTMENT PC INPUT GREEN OFFSET ADJUSTMENT PC INPUT BLUE OFFSET ADJUSTMENT

PC INPUT RED GAIN ADJUSTMENT TARGET PC INPUT GREEN GAIN ADJUSTMENT TARGET PC INPUT BLUE GAIN ADJUSTMENT TARGET Y LEVEL, CHROMA CALCULATION DISPLAY Y LEVEL, CHROMA CALCULATION DISPLAY Y LEVEL, CHROMA CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY CLAMP RANGE Y LEVEL, WHITE LEVEL CALCULATION DISPLAY

I2C BUS CONTROL IC DATA WRITE AND READ

—

SHIFT TO THE SOUND ADJUSTMENT PAGE

—

SHIFT TO THE DVP ADJUSTMENT PAGE

—

SHIFT TO THE TUNER ADJUSTMENT PAGE

—

SHIFT TO THE OTHER ADJUSTMENT PAGE

Function

Response precautions on servicing

REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT.

REFER TO METHOD OF ADJUSTMENT. REFER TO METHOD OF ADJUSTMENT.

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED

USE ENTER KEY TO GO TO THE SOUND ADJUSTMENT PAGE. USE ENTER KEY TO GO TO THE TC ADJUSTMENT PAGE. USE ENTER KEY TO GO TO THE TUNER ADJUSTMENT PAGE. USE ENTER KEY TO GO TO THE OTHER ADJUSTMENT PAGE.

AUDIO ADJUSTMENT PROCESS SPECIFICATIONS

Page No. Item

AUDIO ADJUSTMENT

SOUND1 VOLUME 20 SOUND VOLUME NOT USED

MSP DATA 0 MSP DATA WAIT WRITE AND READ EXECUTED NOT USED CARRIER MUTE ON IGR THR 12D IGR THRESH LEVEL NOT USED

AUDIO ADJUSTMENT

SOUND2 PRESCALE SCART 27

PRESCALE FM/AM-M 31 PRE-SCALE SETTING (TV) NOT USED

AUDIO ADJUSTMENT

SOUND3 BAND1 MIN TV -0350

OTHER -0350

BAND1 CNT TV +0450

OTHER +0450

BABD1 MAX TV +1200

OTHER +1200

BAND2 MIN TV 0000

OTHER 0000

BAND2 CNT TV +0300

OTHER +0300

BABD2 MAX TV +0600

OTHER +0600

BAND3 TV -0150

OTHER -0150

Initial

Value (Do not change other items than designated.)

AUDIO IC MSP DATA WRITE AND READ

AUDIO OUTPUT SETTING WITHOUT TV SYNC

PRE-SCALE SETTING (EXTERNAL INPUT)

EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV) EQUALIZER SETTING (WITH TV INPUT) EQUALIZER SETTING (WITH OTHER INPUT THAN TV)

Function

NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

Response precautions on servicing

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Page No. Item

AUDIO ADJUSTMENT

SOUND4 BAND4 MIN TV -0150

OTHER -0150

BAND4 CNT TV +0150

OTHER +0150

BAND4 MAX TV +0450

OTHER +0450

BAND5 MIN TV -0500

OTHER -0500

BAND5 CNT TV +0300

OTHER +0300

BAND5 MAX TV +1100

OTHER +1100

Initial

Value (Do not change other items than designated.)

Function

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

DVP ADJUSTMENT PROCESS ITEMS

Page No. Item

DVP1 DVP DATA 0000 F0 ------(----) —

DVP TEST PATTERN 0 TEST PATTERN SELECT VCDOFFSET 15 VCDWINDOW 30 READ TEMP ---.--°C —

DVP3 N358 TV CONT 144 N358 IMAGE SETTING (TV) NOT USED

N358 AV CONT 144 N358 TV BRIGHT 122 N358 BRIGHTNESS SETTING (TV) NOT USED N358 AV BRIGHT 122 N358 TV COLOR 52 N358 COLOR DENSITY SETTING (TV) NOT USED N358 AV COLOR 52 N358 TV TINT 138 N358 TINT SETTING (TV) NOT USED N358 AV TINT 138 N358 TV SHARP V 100 N358 AV SHARP V 100 N358 TV SHARP H1 200 N358 AV SHARP H1 200 N358 TV SHARP H2 150 N358 AV SHARP H2 160

DVP4 N443 AV CONT 144

N443 AV BRIGHT 122 N443 N443 AV COLOR 52 N443 AV TINT 138 N443 AV SHARP V 100 N443 AV SHARP H1 200 N443 AV SHARP H2 160

DVP5 PAL AV CONT 144

PAL AV BRIGHT 122 PAL AV COLOR 52 PAL AV TINT 138 PAL AV SHARP V 100 PAL AV SHARP H1 200 PAL AV SHARP H2 160

DVP6 SECAM AV CONT 144

SECAM AV BRIGHT 122 SECAM AV COLOR 52 SECAM AV TINT 138 SECAM AV SHARP V 100 SECAM AV SHARP H1 200 SECAM AV SHARP H2 160

Initial

Value (Do not change other items than designated.)

DVP-RELATED GENERAL-PURPOSE VARIABLE SETTINGS

VERTICAL COUNT-DOWN MINIMUM OSCILLATION CYCLE VERTICAL COUNT-DOWN SYNC RANGE TEMPERATURE DATA READING DISPLAY

N358 IMAGE SETTING (COMPOSITE, S VIDEO)

N358 BRIGHTNESS SETTING (COMPOSITE, S VIDEO)

N358 COLOR DENSITY SETTING (COMPOSITE, S VIDEO)

N358 TINT SETTING (COMPOSITE, S VIDEO) N358 V PICTURE QUALITY SETTING (TV) N358 V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) N358 H PICTURE QUALITY SETTING 1 (TV) N358 H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) N358 H PICTURE QUALITY SETTING 2 (TV) N358 H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO) N443 IMAGE SETTING (COMPOSITE, S VIDEO)

BRIGHTNESS SETTING (COMPOSITE, S VIDEO) N443 COLOR DENSITY SETTING (COMPOSITE, S VIDEO) N443 TINT SETTING (COMPOSITE, S VIDEO) N443 V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) N443 H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) N443 H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO) PAL IMAGE SETTING (COMPOSITE, S VIDEO) PAL BRIGHTNESS SETTING (COMPOSITE, S VIDEO) PAL COLOR DENSITY SETTING (COMPOSITE, S VIDEO) PAL TINT SETTING (COMPOSITE, S VIDEO) PAL V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) PAL H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) PAL H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO) SECAM IMAGE SETTING (COMPOSITE, S VIDEO) SECAM BRIGHTNESS SETTING (COMPOSITE, S VIDEO) SECAM COLOR DENSITY SETTING (COMPOSITE, S VIDEO) SECAM TINT SETTING (COMPOSITE, S VIDEO) SECAM V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) SECAM H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) SECAM H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO)

Function

NOT USED SEE THE ADJUSTMENT PROCESS MODE TEST PATTERNS. NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

Response precautions on servicing

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Page No. Item

DVP7 PAL60 A V CONT 144

PAL60 AV BRIGHT 122 PAL60 AV COLOR 52 PAL60 AV TINT 138 PAL60 AV SHARP V 100 PAL60 AV SHARP H1 200 PAL60 AV SHARP H2 160

DVP8 PAL-M TV CONT 144 PAL-M IMAGE SETTING (TV) NOT USED

PAL-M AV CONT 144 PAL-M TV BRIGHT 122 PAL-M BRIGHTNESS SETTING (TV) NOT USED PAL-M AV BRIGHT 122 PAL-M TV COLOR 52 PAL-M AV COLOR 52 PAL-M TV TINT 138 PAL-M TINT SETTING (TV) NOT USED PAL-M AV TINT 138 PAL-M TV SHARP V 100 PAL-M AV SHARP V 100 PAL-M TV SHARP H1 200 PAL-M AV SHARP H1 200 PAL-M TV SHARP H2 150 PAL-M AV SHARP H2 160

DVP9 PAL-N TV CONT 144 PAL-N IMAGE SETTING (TV) NOT USED

PAL-N AV CONT 144 PAL-N TV BRIGHT 122 PAL-N BRIGHTNESS SETTING (TV) NOT USED PAL-N AV BRIGHT 122 PAL-N TV COLOR 52 PAL-N AV COLOR 52 PAL-N TV TINT 138 PAL-N TINT SETTING (TV) NOT USED PAL-N AV TINT 138 PAL-N TV SHARP V 100 PAL-N AV SHARP V 100 PAL-N TV SHARP H1 200 PAL-N AV SHARP H1 200 PAL-N TV SHARP H2 150 PAL-N AV SHARP H2 160

DVP10 525I CONT 144 525I IMAGE SETTING (TV) NOT USED

525I BRIGHT 122 525I BRIGHTNESS SETTING (TV) NOT USED 525I COLOR 78 525I TINT 146 525I TINT SETTING (TV) NOT USED 525I SHARP V 100 525I SHARP H1 160 525I SHARP H2 160 525P CONT 144 525P BRIGHT 122 525P COLOR 78 525P TINT 146 525P SHARP V 100 525P SHARP H1 120 525P SHARP H2 120

Initial

Value (Do not change other items than designated.)

PAL60 IMAGE SETTING (COMPOSITE, S VIDEO) PAL60 BRIGHTNESS SETTING (COMPOSITE, S VIDEO) PAL60 COLOR DENSITY SETTING (COMPOSITE, S VIDEO) PAL60 TINT SETTING (COMPOSITE, S VIDEO) PAL60 V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) PAL60 H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) PAL60 H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO)

PAL-M IMAGE SETTING (COMPOSITE, S VIDEO)

PAL-M BRIGHTNESS SETTING (COMPOSITE, S VIDEO) PAL-M COLOR DENSITY SETTING (TV) PAL-M COLOR DENSITY SETTING (COMPOSITE, S VIDEO)

PAL-M TINT SETTING (COMPOSITE, S VIDEO) PAL-M V PICTURE QUALITY SETTING (TV) PAL-M V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) PAL-M H PICTURE QUALITY SETTING 1 (TV) PAL-M H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) PAL-M H PICTURE QUALITY SETTING 2 (TV) PAL-M H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO)

PAL-N IMAGE SETTING (COMPOSITE, S VIDEO)

PAL-N BRIGHTNESS SETTING (COMPOSITE, S VIDEO) PAL-N COLOR DENSITY SETTING (TV) PAL-N COLOR DENSITY SETTING (COMPOSITE, S VIDEO)

PAL-N TINT SETTING (COMPOSITE, S VIDEO) PAL-N V PICTURE QUALITY SETTING (TV) PAL-N V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) PAL-N H PICTURE QUALITY SETTING 1 (TV) PAL-N H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) PAL-N H PICTURE QUALITY SETTING 2 (TV) PAL-N H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO)

525I COLOR DENSITY SETTING (TV)

525I V PICTURE QUALITY SETTING (TV) 525I H PICTURE QUALITY SETTING 1 (TV) 525I H PICTURE QUALITY SETTING 2 (TV) 525P IMAGE SETTING (COMPOSITE, S VIDEO) 525P BRIGHTNESS SETTING (COMPOSITE, S VIDEO) 525P COLOR DENSITY SETTING (COMPOSITE, S VIDEO) 525P TINT SETTING (COMPOSITE, S VIDEO) 525P V PICTURE QUALITY SETTING (COMPOSITE, S VIDEO) 525P H PICTURE QUALITY SETTING 1 (COMPOSITE, S VIDEO) 525P H PICTURE QUALITY SETTING 2 (COMPOSITE, S VIDEO)

Function

Response precautions on servicing

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

Page No. Item

DVP11 625I CONT 144 625I IMAGE SETTING (TV) NOT USED

625I BRIGHT 122 625I BRIGHTNESS SETTING (TV) NOT USED 625I COLOR 78 625I TINT 146 625I TINT SETTING (TV) NOT USED 625I SHARP V 100 625I SHARP H1 160 625I SHARP H2 160 625P CONT 144 625P IMAGE SETTING (TV) NOT USED 625P BRIGHT 122 625P BRIGHTNESS SETTING (TV) NOT USED 625P COLOR 78 625P TINT 146 625P TINT SETTING (TV) NOT USED 625P SHARP V 100 625P SHARP H1 120 625P SHARP H2 120

DVP12 1125I CONT 144 1125I IMAGE SETTING (TV) NOT USED

1125I BRIGHT 122 1125I BRIGHTNESS SETTING (TV) NOT USED 1125I COLOR 78 1125I TINT 146 1125I TINT SETTING (TV) NOT USED 1125I SHARP V 100 1125I SHARP H1 100 1125I SHARP H2 100 750P CONT 144 750P IMAGE SETTING (TV) NOT USED 750P BRIGHT 122 750P BRIGHTNESS SETTING (TV) NOT USED 750P COLOR 78 750P TINT 146 750P TINT SETTING (TV) NOT USED 750P SHARP V 100 750P SHARP H1 100 750P SHARP H2 100

Initial

Value (Do not change other items than designated.)

625I COLOR DENSITY SETTING (TV)

625I V PICTURE QUALITY SETTING (TV) 625I H PICTURE QUALITY SETTING 1 (TV) 625I H PICTURE QUALITY SETTING 2 (TV)

625P COLOR DENSITY SETTING (TV)

625P V PICTURE QUALITY SETTING (TV) 625P H PICTURE QUALITY SETTING 1 (TV) 625P H PICTURE QUALITY SETTING 2 (TV)

1125I COLOR DENSITY SETTING (TV)

1125I V PICTURE QUALITY SETTING (TV) 1125I H PICTURE QUALITY SETTING 1 (TV) 1125I H PICTURE QUALITY SETTING 2 (TV)

750P COLOR DENSITY SETTING (TV)

750P V PICTURE QUALITY SETTING (TV) 750P H PICTURE QUALITY SETTING 1 (TV) 750P H PICTURE QUALITY SETTING 2 (TV)

Function

Response precautions on servicing

NOT USED

NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED

NOT USED

NOT USED NOT USED NOT USED

DEFAULT CHART OF ADJUSTMENT PROCESS TUNER ITEMS

Page No. Item

BASIC SETTINGS

TUNER1 AFT UP 1.80

AFT DOWN 1.20 LSYNC 150 HSYNC 162 LSYNC2 150 HSYNC2 162 AVSYNC 1 COMPSYNC 3 EDS TEST 10

TUNER2 AFT FARTIME 50

AFT NEARTIME 30 AFT NEARTIME 10 AFT 1STEPTIME 10 AFT CSYNCTIME 50 SYNC ON 10

SYNC WIDTH 1

Initial

Value (Do not change other items than designated.)

AFT VOLTAGE REFERENCE LEVEL (ALL BANDS) AFT VOLTAGE REFERENCE LEVEL (ALL BANDS) SYNC JUDGMENT THRESHOLD (TV) SYNC JUDGMENT THRESHOLD (TV) SYNC JUDGMENT THRESHOLD (FOR TV AFT CHANNEL (1-CH) SELECT) SYNC JUDGMENT THRESHOLD (FOR TV AFT CHANNEL (1-CH) SELECT) SYNC DETERMINATION THRESHOLD (EXTERNAL INPUT) SYNC JUDGMENT THRESHOLD (COLOR DIFFERENCE INPUT) DURATION UNTIL JUDGMENT OF NO EDS TIME DATA (SECONDS) CHANNEL PRESET TIME ADJUSTMENT 1 CHANNEL PRESET TIME ADJUSTMENT 2 CHANNEL PRESET TIME ADJUSTMENT 3 CHANNEL PRESET TIME ADJUSTMENT 4 CHANNEL PRESET TIME ADJUSTMENT 5 CHANNEL PRESET SYNC JUDGMENT, CONTINUOUS MATCHING TIMES(CH SEARCH, AIR/CABLE JUDGMENT, CLOCK SYNC JUDGMENT) CHANNEL PRESET SYNC JUDGMENT, THRESHOLD (SYNC PROVIDED JUST AFTER THE MAXIMUM-TOMINIMUM DIFFERENCE COMES SMALLER)

Function

Response precautions on servicing

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED

NOT USED

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

DEFAULT CHART OF OTHER ADJUSTMENT PROCESS ITEMS

Page No. Item

OTHERS

OTHERS1 DAC DATA —

L ERROR WAIT 15s L ERROR H TIME 1.0s LAMP ERROR DETECT TIME NOT USED TV AUTO GAIN OFF AUTO GAIN SETTING FOR TV NOT USED PWM FREQ 150 PWM DUTY 0 DIMMER DUTY SETTING NOT USED OPC THRESHOLD 24

HOTEL POWERFIX OFF COMP SYSTEM AUTO REMOCON CODE DISPLAYED AT THE BOTTOM

OTHERS

OTHERS2 CLOSED CAPTION 15 CLOSED CAPTION THRESH LEVEL NOT USED

AUTO CLOCK DISPLAYED ON THE 2ND, 3RD AND 4TH LINES FROM BOTTOM FOR US-DESTINED MODELS

Initial

Value (Do not change other items than designated.)

DAC-RELATED GENERAL-PURPOSE VARIABLE SETTINGS LAMP ERROR DETECT WAIT TIME

DIMMER FREQUENCY SETTING (IN HZ)

INPUT LEVEL THRESHOLD FROM BRIGHTNESS SENSOR STOP MODE TO OPERATION MODE USED FOR FIXED HOTEL MODE POWER ON COMPONENT SIGNAL SELECT IN ADJUSTMENT PROCESS

Function

NOT USED NOT USED

NOT USED

NOT USED NOT USED

Response precautions on servicing

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 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.

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

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.

2 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.

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

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 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 ] Reset Enter

5. On Setting Items

* "EZ-SETUP" discussed below indicates "EZ-SETUP after the first power-on". (1) MAXIMUM VOLUME

Selection Default Explanation Limit in Setting

Exception

Remarks

(2) VOLUME FIXED

Selection Default Explanation Limit in Setting

Exception

Remarks

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.

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

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

» The following keys become invalid:

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

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

setting.

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

abolished (and follows the last memory).

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

before executing the hotel mode is held.

» 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.

» 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

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

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

(3) VOLUME FIXED LEVEL

Selection Default Explanation Limit in Setting Exception Remarks

Adjustment from 1 to 60 (no loop) 20 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.

(4) 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 sensor) are accepted.

2In

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

» 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.

"Volume fixed" is determined.

"Volume fixed" is selected for "fixed".

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

"limited" setting, only power ON/OFF, sound volume '", tuning '" and BACKLIGHT (brightness "No respond" setting, all the keys (including the power key) are not accepted.

ting.

(5) 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.

(6) 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

(7) ON SCREEN DISPLAY

Selection Default Explanation

Limit in Setting

Others

Exception

Remarks

Selection between "Yes" , "Limited" (loop provide) Yes The following OSD displays are made ineffective. Displays of menu group, channel call, sound volume bar and direct key call

» ON-timer (Wake-up timer) is cleared and set to "OFF". » Set time of the OFF-timer (SLEEP TIMER) is cleared. » Setting of the no-signal power-OFF (AUTO POWER OFF) is cleared to "OFF". » Setting of the no-operation power-OFF is cleared to "OFF". » Keys falling under any of the following items become invalid.

1Appearance of screen changes and the sound changes. 2Personal functions which are hard to restore.

Ex.) Screen display, menu, OFF-timer, ON-timer, AV MODE, screen size switching, clock setting, treble emphasis, AUDIO ONLY, sound changeover, LANGUAGE, CLOSED CAPTION

» Simple input switching is generated. Those which are restored soon after leaving as they are and may be

requested for change by customer are not prohibited. Ex.) Brightness sensor (BACKLIGHT) and PIC. FLIP

» Such a caution which is displayed independently is displayed as it is.

Non-responding signal caution, V-Chip caution and power-ON fixing caution

» In "No" setting, the setting of "SOUND ONLY MODE" is changed to "OFF" and selecting operation is

made prohibited.

» When CC has already been ON, CLOSED CAPTION is displayed.

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

(8) INPUT MODE START

Selection Default Explanation

About options

Limit in Setting Exception Remarks

Selection between Normal In power-ON, the input source to be started or channel can be set. (In standard mode, the operation follows the last memory.)

» All the input sources in the model are made selectable. » When the input/output switchable input source is selected and the input source is set to output, the setting

of input/output switching is changed to input at the execution of hotel menu. In addition, the input/output switching by menu is prohibited.

» In TV mode, the display of all channels is stopped and it is treated as an input source. At this time, the

channel to be set follows the last memory and the content of the last memory is included in the notation by options. Ex.) TV (CH2), TV (CH4) etc.

» The order of appearance of options in the hotel menu should agree with the order of toggles by input

switching key.

» The display of channel setting menu and the channel setting operation are prohibited (except for MCL). » In the start by "ON-timer (Wake-up timer)", the channel set by ON-timer (Wake-up timer) has priority. » In setting at "Normal", the setting of "Input mode fixed" is changed to "Variable" and selection should be

prohibited.

"Normal" , "TV (CH~)" "COMPONENT" "AV1" and "AV2" (loop provide)

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

(9) INPUT MODE FIXED

Selection Default Explanation

Limit in Setting

Exception Remarks

Selection between

"Variable" and "Fixed" (loop provide)

– (Variable) The input mode is fixed at the input source or the channel set at the

"Input mode start" in 9 and other input

sources and channels can be made non-selectable.

» With the execution of hotel mode, the input source is forced to change to that set by "Input mode start"

and the channel switching and input switching are prohibited thereafter.

» ON-timer's (Wake-up timer) channel items are not displayed or the operation is prohibited. (Basically, they

are not displayed.)

» The following keys are invalidated.

CH '", direct tuning button, FLASHBACK, input ~However, the keys (input switching and CH '" keys) of the unit for menu operation remain valid.

None

» In the following case, setting is cancelled and mode is changed to "Variable".

1When the setting of

"Input mode start" is set to "Standard (Normal)"

TROUBLE SHOOTING TABLE

No or Wrong Picture

Are the waveforms at

pins (84), (89) and (90)

of IC801 as specified?

Check IC801 and its

peripheral circuits as

well as the LCD panel

voltage and waveform.

Check the related lines,

IC801 itself and its

peripheral circuits.

Are the waveforms at the signal

input pins of IC801 as specified?

TV/Composite … Pin (40)

S Video … Pins (42) and (31)

Component … Pins (21), (33) and

(44)

Check the IC801 signal

input line.

Check IC801 and its

peripheral circuits.

Yes

Does the IC801 test pattern appear

properly?

No Power (Power LED indicator still in red)

Go to the adjustment process mode.

Move the cursor to ERROR NO RESET

and click on it (to reset to zero).

Turn off the power.

Is the power turned on again?

MODEL A628

INCH SIZE 20

ERROR NO RESET 0

PUBLIC MODE OFF

V-CHIP 1

EXT CONTROL OFF

VER ROM

A GAIBU

***

Note:

This model is equipped with the lamp error detection function that detects the current

flowing into the fluorescent lamp and protects the backlight lamp drive circuit.

If a lamp error is detected, the microprocessor interrupts the unit and the ERROR NO

RESET setting will go up.

When the ERROR NO RESET setting has reached "5", the microprocessor turns and

keeps off the unit's power. To resume the power, take the above procedure to clear the

ERROR NO RESET setting.

Check the following points.

(1) Backlight lamp

(2) Inverter circuit Sub PWB F6701, Q6719, Q6720, Q6721, Q6722, Q6723,

Q6724 and their peripheral parts as well as pins (187) of IC801, Q7752

(3) Lamp error detection circuit Q6703, Q6704, IC6701 and their peripheral parts

as well as pin (42) of IC2001

LC-20B8U-S LC-20B9U-S LC-20B9U-SM

LC-20B8U-S

Check the secondary

load of T7001.

Is pin (10) of IC7002

and IC7001 at "H"?

Check the load of

IC7002 and IC7001 and

its peripheral circuits.

Is the primary

oscillation wave of

T7001 as specified?

Are the secondary

outputs of T7001 +5V, -

12V, +35V and +9V?

Is there DC 12V input at

T7001 and pin (8) of

IC7301?

Is the output voltage of

IC7002 and IC7001 as

specified?

Check the load of IC701

thru IC703.

Check T7701, IC7701

and their peripheral

circuits.

Check the primary side

of T7001, IC7301 and

its peripheral circuits.

Disconnect F7701. Is

the load short-circuited?

Is pin (187) of IC801 at

"H" or pulse?

Check the line in

question, IC801 and its

peripheral circuits.

Check the primary side

of T7001, Q7001 and

its peripheral circuits.

Check pin (72) of

IC2001, pin (12) of

SC2004 and pin (12)

of P7702.

No video and audio output (no power) No fluorescent lamp light-up

No No

Are Q6719-Q6724 free

from short-circuit?

Check Q6719-Q6724 and

their peripheral part.

Are F7701 as specified?

Replace F7701.

Is F6701 normal?

Replace F6701.

Yes

Replace and check the

fluorescent lamp.

Yes

Is the oscillation

waveform of the primary

side of T6701-T6712

normal?

Check the peripheral

parts of Q6719-Q6724

and the connecting cable.

Yes

Yes Yes

Check the microprocessor's adjustment process menu for wrong settings.

LC-20B9U-S LC-20B9U-SM

TROUBLE SHOOTING TABLE (Continued)

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