Sharp LC-20SH20U Schematic

#########

LCD COLOR TELEVISION

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

SERVICING NOTICES ON CHECKING ..............................................................................

•

HOW TO ORDER PARTS ....................................................................................................

•

IMPORTANT.........................................................................................................................

•

ABOUT LEAD FREE SOLDER (PbF) ..................................................................................

•

GENERAL SPECIFICATIONS..............................................................................................

•

DISASSEMBLY INSTRUCTIONS ........................................................................................

•

SERVICE MODE LIST..........................................................................................................

•

WHEN REPLACING EEPROM (MEMORY) IC ....................................................................

•

ELECTRICAL ADJUSTMENTS ............................................................................................

•

TROUBLESHOOTING GUIDE .............................................................................................

•

BLOCK DIAGRAM ................................................................................................................

•

PRINTED CIRCUIT BOARDS ..............................................................................................

•

SCHEMATIC DIAGRAMS ....................................................................................................

•

WAVEFORMS ......................................................................................................................

•

MECHANICAL EXPLODED VIEWS .....................................................................................

•

REPLACEMENT PARTS LIST .............................................................................................

•

LC-20SH20U

Page A1-1 A1-1 A1-1 A1-2 A2-1~A2-5 B1-1~B2-2 C-1 C-2 D-1~D-4 E-1~E-6 F-1~F-10 G-1~G-8 H-1~H-32 I-1, I-2 J-1~J-3 K1-1~K2-8

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

SERVICING NOTICES ON CHECKING

1. KEEP THE NOTICES

As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual.

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an electric shock while the electric current is flowing.

3. USE THE DESIGNATED PARTS

The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety. Therefore, the part which is replaced should be used the part which has the same character. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark, the designated parts must be used.

4. BE CAREFUL WITH THE LCD PANEL

Avoid a shock to the panel while servicing. Take enough care to deal with it.

5. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING

There are parts which use the insulation material such as a tube or tape for safety, or which are assembled in the condition that these do not contact with the printed board. The inside wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions.

PERFORM A SAFETY CHECK AFTER

6. SERVICING

Confirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the portions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that.

(INSULATION CHECK PROCEDURE)

Unplug the plug from the AC outlet.

Remove the antenna terminal on TV and turn on the TV.

Insulation resistance between the cord plug terminals and the eternal exposure metal [Note 2] should be more than 1M ohm by using the 500V insulation resistance meter [Note 1].

If the insulation resistance is less than 1M ohm, the inspection repair should be required.

[Note 1]

If you have not the 500V insulation resistance meter, use a Tester.

[Note 2]

External exposure metal: Antenna terminal

Earphone jack

HOW TO ORDER PARTS

Please include the following informations when you order parts. (Particularly the VERSION LETTER.)

1. MODEL NUMBER and VERSION LETTER The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be

found at the end of the SERIAL NUMBER.

2. PART NO. and DESCRIPTION You can find it in your SERVICE MANUAL.

IMPORTANT

When you exchange IC and Transistor with a heat sink, apply silicon grease (YG6260M) on the contact section of the heat sink. Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damage to the IC and Transistor).

A1-1

ABOUT LEAD FREE SOLDER (PbF)

Distinction of PbF PCB:

PCBs (manufactured) using lead free solder will have a PbF printing on the PCB. (Please refer to figures.)

Caution:

Pb free solder has a higher melting point than standard solder;

•

Typically the melting point is 86°F~104°F(30°C~40°C) higher. Please use a soldering iron with temperature control and adjust it to 650°F ± 20°F (350°C ± 10°C). In case of using high temperature soldering iron, please be careful not to heat too long. Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C).

•

All products with the printed circuit board with PbF printing must be serviced with lead free solder.

•

When soldering or unsoldering, completely remove all of the solder from the pins or solder area, and be sure to heat the soldering points with the lead free solder until it melts sufficiently.

Recommendations

Recommended lead free solder composition is Sn-3.0Ag-0.5Cu.

A1-2

GENERAL SPECIFICATIONS

G-1 TV LCD LCD Size / Visual Size 20.04 inch / 508.9mmV

System LCD Type Color TFT LCD

Color System NTSC Speaker 2 Speaker

Sound Output Max 2.5W + 2.5W

G-2 Tuning Broadcasting System US System M

System Tuner and System 1Tuner

Receive CH Destination US (W/CABLE)

Intermediate Picture(FP) 45.75MHz Frequency Sound(FS) 41.25MHz

Preset CH No Stereo/Dual TV Sound US-Stereo Tuner Sound Muting Yes

G-3 Signal Video Signal Input Level 1 V p-p/75 ohm

RGB Signal Output Level -Audio Signal Input Level 0.85 V p-p/50k ohm

G-4 Power Power Source AC 120V, 60Hz

Power Consumption at AC 80W at 120V 60Hz

Protector Power Fuse Yes

G-5 Regulation Safety UL/CSA/NOM

G-6 Temperature Operation 0oC ~ +40oC

G-7 Operating Humidity Less than 80% RH G-8 Clock and Clock Yes

Timer Sleep Timer Max Time 120 Min

On Timer Program No Off Timer Program No Game Timer No Wake Up Timer No Timer Back-up (at Power Off Mode) more than -- Min Sec

Number of Pixels 1366(H) x 768(V)

View Range Left/Right 88/88 degree

Position Front Size 1.8 x 3.9 inch Impedance 8 ohm

10%(Typical) ---

CH Coverage 2~69, 4A, A-5~A-1, A~I, J~W, W+1~W+84

FP-FS 4.50MHz

Output Level -S/N Ratio (Weighted) -Horizontal Resolution at DVD Mode --

Output Level at DVD --

Digital Output Level -S/N Ratio at DVD (Weighted) -Harmonic Distortion -Frequency Response : at DVD --

DC --

Stand by (at AC) 1W at 120V 60Hz Energy Star Yes Per Year -- kWh/Year

Safety Circuit Yes IC Protector(Micro Fuse) Yes

Radiation FCC/IC Laser --

Storage -20oC ~ +60oC

Step

Up/Down 88/88 degree

at TV --

at Video CD --

at SVCD --

at CD --

at DC --

10 Min

A2-1

GENERAL SPECIFICATIONS

G-9 Remote Unit RC-MQ

Control Glow in Dark Remocon No

Remocon Format SHARP Format SHARP Custom Code 10000 / 10001 Power Source Voltage(D.C) 3V

Total Keys 39 Keys Keys

UM size x pcs UM-3 x 2 pcs

POWER FUNCTION Source POWER DISPLAY LIGHT SEARCH+ SEARCHPLAY REC STOP PAUSE SKIP+ SKIPVIEW MODE 1 2 3 4 5 6 7 8 9 0 MTS ENT INPUT FLASH BACK VOL+ VOLCH+ CHBACKLIGHT MUTE FREEZE MENU LEFT ENTER RIGHT UP DOWN EXIT RETURN FAVORITE A FAVORITE B FAVORITE C FAVORITE D FAVORITE SLEEP AUDIO AV MODE CC SURROUND

Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes

No No

No No No No No No No No No

A2-2

GENERAL SPECIFICATIONS

G-10 Features Auto Shut Off Yes

(TV) Auto Search No

Power On Memory Yes Comb Filter Yes

Game Position No Auto Setup(Language/CH Program) No Picture Setting(TV) Yes

AV Mode(Picture Preference) Yes Brightness , Contrast , Color Yes Tint Yes Sharpness Yes Color Temperature Yes Cable Clear No

Picture Setting(PC) Yes

BRIGHTNESS , CONTRAST Yes HOR POSITION , VER POSITION Yes PHASE , CLOCK Yes AUTO ADJUST No RED , GREEN , BLUE Yes

Audio MTS Yes

Tone Control (Bass/Treble/Balance) Yes Stable Sound No Surround Yes BBE No SRS WOW (SRS 3D/Focus/Tru Bass) No Variable Audio Out No

Tuning CH Program Yes

Air/Cable Yes ADD/DELETE Yes

Label CH Label Yes

Video Label Yes Favorite CH Yes V-Chip Yes

Type USA Type RRT Setup Lock Hotel Lock No

Channel Lock No

Video Lock No

Panel Lock No OSD Language Closed Caption

CC Advanced View Mode (Picture Size) Yes(SIDE BAR/S.STRETCH/ZOOM/STRETCH) Picture Scroll Yes Cinema Mode Yes Aspect Yes Backlight Yes PFC(Power Factor circuit) Freeze frame Yes PIP/POP No Direct Input Selection Yes PC Monitor Input Yes

VGA (640x480) Yes (60Hz)

VGA (720x400) Yes (70Hz)

WVGA (848x480) Yes (60Hz)

SVGA (800x600) Yes (60Hz)

XGA (1024x768) Yes (60Hz)

WXGA (1280x768) Yes (60Hz)

WXGA (1280x720) Yes (60Hz)

WXGA (1360x768) Yes (60Hz)

SXGA (1280x1024) No HDMI Input Yes

VGA (640x480) Yes (60Hz)

720x480i (4:3) Yes (60Hz)

720x480i (16:9) Yes (60Hz)

720x480p (4:3) Yes (60Hz)

720x480p (16:9) Yes (60Hz)

720x576i (4:3) No

720x576i (16:9) No

720x576p (4:3) No

720x576p (16:9) No

1280x720p Yes (60Hz)

1920x1080i Yes (60Hz)

3 -D

English French S Yes

anish

A2-3

GENERAL SPECIFICATIONS

Component Input Yes

G-11 Accessories Owner's Manual Language English/French/Spanish

Remote Control Unit Yes Rod Antenna

Loop Antenna

U/V Mixer DC Car Cord (Center+) Guarantee Card Warning Sheet Circuit Diagram Antenna Change Plug Service Facility List Important Safeguard Dew/AHC Caution Sheet Quick Set-up Sheet Battery Yes

AC Adapter AC Cord (for AC Adapter) AV Cord (2Pin-1Pin) Registration Card (NDL Card) Yes 300ohm to 75ohm Antenna Adapter Sheet Information (Return) Sheet Information (HDMI) No Screw for wall hanging No

720x480i (4:3) Yes (60Hz)

720x480i (16:9) Yes (60Hz)

720x480p (4:3) Yes (60Hz)

720x480p (16:9) Yes (60Hz)

720x576i (4:3) No

720x576i (16:9) No

720x576p (4:3) No

720x576p (16:9) No

1280x720p Yes (60Hz)

1920x1080i Yes (60Hz)

w/Guarantee Card Yes

No Poles -Terminal --

No Terminal --

UM size x pcs UM-3 x 2 pcs OEM Brand No

A2-4

GENERAL SPECIFICATIONS

G-12 Interface Switch Top Power (Tact) Yes

Indicator Power / Stand-by Yes(GREEN / RED)

Terminals Rear Video Input 1 RCA x 1

Side Video Input 2 No

G-13 Set Size Approx. W x D x H (mm) 553 x 228 x 448

G-14 Weight Net (Approx.) 8.7kg (19.2 lbs)

G-15 Carton Master Carton No

Gift Box Material Double/White

Drop Test 1 Corner / 3 Edges / 6 Surfaces

Container Stuffing (40' container) 492

G-16 Material Cabinet Front PS 94V0 NON-DECABROM

PCB Non-Halogen Demand No

G-17 Environment Environmental standard requirement (by buyer) Green PROCUREMENT of SHARP

Pb-Free Phase 3 (Phase 3A)

Channel Up/Menu Up Yes Channel Down/Menu Down Yes Volume Up/Menu > Yes Volume Down/Menu < Yes Menu Yes Play No Eject No Skip+, Search+ No Skip-, Search- No Still/Pause No Stop No Main Power SW No Input Select Yes

Power No Stand-by No On Timer No

Audio Input 1 S - Input 1 Video Input 2 RCA x 1 Audio Input 2 S- Input 2 No Video Output No Audio Output No Component Input Analog Audio RCA x 2(L/MONO, R) HDMI Input Analog Audio PC Monitor Audio Input Alternative PC Monitor Input Analog Audio RCA x 2(L/MONO, R) Digital Audio Output No DC Jack No VHF/UHF Antenna Input Other Terminal AC Outlet No

Audio Input 2 No PC Monitor Input(w/ Analog Audio L/R) No Other Terminal No

w/o Handle, Stand Approx. W x D x H (mm)

Net w/o Handle, Stand (Approx.) 7.4kg (16.4 lbs) Gross (Approx.) 11.0kg (24.3 lbs)

Content --- Sets Material --- / --Dimensions W x D x H(mm) --Description of Origin ---

W/Color Photo Label No W/Handle No Dimensions W x D x H(mm) 654 x 338 x 565 Description of Origin Yes

Height (cm) 62

Rear PS 94V0 NON-DECABROM

Eyelet Demand Yes

Measures for Whisker Yes

RCA x 2(L/MONO, R) Yes

RCA x 2(L/MONO, R)

RCA x 3

HDMI x 1

Dsub15pin x 1

F Type Headphone

553 x 110 x 403

Sets

A2-5

DISASSEMBLY INSTRUCTIONS

1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS

1-1: BACK COVER/STAND ASS'Y (Refer to Fig. 1-1)

Unlock the 7 supports 1.

Remove the Back Cover in the direction of arrow (A).

Remove the 4 screws 2.

Remove the Stand Ass'y in the direction of arrow (B).

(B)

Stand Ass'y

Fig. 1-1

Back Cover

(A)

1-2: BACK CABINET (Refer to Fig. 1-2)

Remove the 10 screws 1.

Remove the screw 2.

Remove the Back Cabinet in the direction of arrow.

1-3: ANGLE HANDLE-DVD (Refer to Fig. 1-3)

Remove the screw 1.

Remove the 4 screws 2.

Remove the Angle Handle-DVD in the direction of arrow.

Angle Handle-DVD

Fig. 1-3

1-4: POWER PCB (Refer to Fig. 1-4)

Disconnect the following connectors: (CP3807, CP3810 and CP3811).

Remove the 4 screws 1.

Remove the Power PCB in the direction of arrow.

Power PCB

Back Cabinet

Fig. 1-4

Fig. 1-2

B1-1

DISASSEMBLY INSTRUCTIONS

1-5: SCALER PCB (Refer to Fig. 1-5)

Disconnect the following connectors: (CP802, CP803, CP2200, CP3201 and CP7203).

Remove the 2 screws 1.

Remove the 3 screws 2.

Remove the screw 3.

Remove the Plate Jack-3 in the direction of arrow (A).

Remove the 4 screws 4.

Remove the Shield Scaler in the direction of arrow (B).

Remove the 4 screws 5.

Remove the Scaler PCB in the direction of arrow (C).

Scaler PCB

(C)

Shield Scaler

(B)

(A)

Plate Jack-3

Plate Jack-2

AV PCB

Shield Jack-2

(B)

(C)

Plate Jack-1

(A)

Shield Jack-1

Fig. 1-6

OPERATION PCB/REMOCON PCB

1-7:

(Refer to Fig. 1-7)

Remove the 2 screws 1.

Remove the Holder PCB-TV in the direction of arrow (A).

Remove the 2 screws 2.

Remove the Operation PCB in the direction of arrow (B).

Remove the 2 screws 3.

Remove the Remocon PCB in the direction of arrow (C).

1-6: AV PCB (Refer to Fig. 1-6)

Disconnect the following connectors: (CP301, and CP4202).

Remove the screw 1.

Remove the screw 2.

Remove the Plate Jack-1 and Shield Jack-1 in the direction of arrow (A).

Remove the 3 screws 3.

Remove the screw 4.

Remove the Plate Jack-2 and Shield Jack-2 in the direction of arrow (B).

Remove the 6 screws 5.

Remove the AV PCB in the direction of arrow (C).

Fig. 1-5

Holder PCB-TV

Operation PCB

Remocon PCB

(A)

(B)

(C)

Fig. 1-7

B1-2

DISASSEMBLY INSTRUCTIONS

1-8: LCD COVER/LCD PANEL (Refer to Fig. 1-8)

Remove the 3 screws 1.

Remove the screw 2.

Remove the 2 screws 3.

Remove the 2 screws 4.

Remove the Angle Hinge in the direction of arrow (A).

Remove the screw 5.

Remove the 8 screws 6.

Remove the LCD Cover in the direction of arrow (B).

Remove the 4 screws 7.

10.

Remove the LCD Panel in the direction of arrow (C).

Angle Hinge

LCD Cover

(A)

(C)

Front Cabinet

LCD Panel

(B)

Fig. 1-8

B1-3

DISASSEMBLY INSTRUCTIONS

REMOVAL AND INSTALLATION OF FLAT PACKAGE IC

REMOVAL

Put Masking Tape (cotton tape) around the Flat Package

IC to protect other parts from any damage.

(Refer to Fig. 2-1.) NOTE

Masking is carried out on all the parts located within 10 mm distance from IC leads.

When IC starts moving back and forth easily after

3. desoldering completely, pickup the corner of the IC using tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.)

NOTE

Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it.

Blower type IC desoldering machine

Masking Tape (Cotton Tape)

Heat the IC leads using a blower type IC desoldering

machine. (Refer to Fig. 2-2.)

NOTE

Do not rotate or move the IC back and forth , until IC can move back and forth easily after desoldering the leads completely.

Blower type IC desoldering machine

Fig. 2-1

Tweezers

Peel off the Masking Tape.4. Absorb the solder left on the pattern using the Braided

5. Shield Wire. (Refer to Fig. 2-4.)

NOTE

Do not move the Braided Shield Wire in the vertical direction towards the IC pattern.

Fig. 2-3

Braided Shield Wire

Soldering Iron

Fig. 2-2

IC pattern

Fig. 2-4

B2-1

DISASSEMBLY INSTRUCTIONS

INSTALLATION

Take care of the polarity of new IC and then install the

1. new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

(Refer to Fig. 2-5.)

Soldering Iron

Solder temporarily

Supply the solder from the upper position of IC leads

Solder temporarily

sliding to the lower position of the IC leads. (Refer to Fig. 2-6.)

Fig. 2-5

When bridge-soldering between terminals and/or the

4. soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 2-8.)

Thin-tip Soldering Iron

Fig. 2-8

Finally, confirm the soldering status on four sides of the

5. IC using a magnifying glass. Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC. If some abnormality is found, correct by resoldering.

NOTE

When the IC leads are bent during soldering and/or repairing, do not repair the bending of leads. If the bending of leads are repaired, the pattern may be damaged. So, always be sure to replace the IC in this case.

Soldering IronSolder

Absorb the solder left on the lead using the Braided

Supply soldering from upper position to lower position

Shield Wire. (Refer to Fig. 2-7.)

NOTE

Do not absorb the solder to excess.

Soldering Iron

Braided Shield Wire

Fig. 2-6

Fig. 2-7

B2-2

SERVICE MODE LIST

This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit and on the remote control

for more than a the standard time in the appropriate condition. (See below chart.)

Set

Condition

TV mode

ALL mode

Set Key Operations

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

Remocon

Key

0 2 sec.

1 2 sec.

6 2 sec.

9 2 sec.

Standard

Time

2 sec.

Releasing of V-CHIP PASSWORD.

Initialization of factory TV data. NOTE:

POWER ON total hours are displayed on the screen. Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".

Check of the SUM DATA and MICON VERSION on the screen. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".

Display of the Adjustment MENU on the screen. Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).

If you set factory initialization, the memories are reset such as the channel setting, and the POWER ON total hours.

C-1

WHEN REPLACING EEPROM (MEMORY) IC

CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS AND MICON VERSION

Initial total of MEMORY IC, POWER ON total hours and MICON VERSIONcan be checked on the screen. Total hours are displayed in 16 system of notation.

NOTE:

CONFIRMATION OF INITIAL DATA

If you set a factory initialization, the total hours is reset to "0". Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.

Turn on the POWER, and set to the TV mode. Set the VOLUME to minimum. Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds. After the confirmation of each check sum, turn off the power.

*1 DVP1 is different according to each set.

MICON Version

INIT : 56A7 VOLUME: 07B2 ROM : 69D4 ADC : 787B DVP1 : 1E65 *1 DVP2 : 5A51 LCD ON : 0000

OEC7158A-039

FIG. 1

Initial setting data check sum. VOLUME CURVE data check sum.

Rom correction data check sum. AD CONVERTER data check sum.

SCALER data check sum. POWER ON total hours.

= (16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value)

If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to INITIAL SETTING TABLE (Attached "INITIAL DATA").

Turn on the POWER, and set to the TV mode.

1. Set the VOLUME to minimum.

2. Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.

3. ADDRESS and DATA should appear as FIG 1.

ADDRESS DATA

INIT 0001 B4 LCD ON 0000 OEC7158A-039

FIG. 1

ADDRESS is now selected and should "blink". Using the UP/DOWN buton on the remote, step through the ADDRESS until

4. Press RIGHT/LEFT button to select DATA. When DATA is selected, it will "blink". Again, step through the DATA using UP/DOWN button until required DATA value has been selected.

5. Pressing RIGHT/LEFT button will take you back to ADDRESS for further selection if necessary.

6. Repeat steps 4 to 6 until all data has been checked.

7. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

After the data input, set to the initializing of shipping.

Turn POWER on.

9. Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.

10. After the finishing of the initializing of shipping, the unit will turn off automatically.

11.

The unit will now have the correct DATA for the new MEMORY IC.

C-2

ELECTRICAL ADJUSTMENTS

1. ADJUSTMENT PROCEDURE

Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies.

CAUTION

Use an isolation transformer when performing any

• service on this chassis. When removing a PCB or related component, after

• unfastening or changing a wire, be sure to put the wire back in its original position. When you exchange IC and Transistor with a heat sink,

• apply silicon grease on the contact section of the heat sink. Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damages to the IC and Transistor).

Prepare the following measurement tools for electrical adjustments.

1. Patterm Generator

On-Screen Display Adjustment

1.2.Set the VOLUME to minimum. Press the VOL. DOWN button on the set and the channel button (9) on the remote control for more than 2 seconds to display adjustment mode on the screen as shown in Fig. 1-1.

Function

Use the Channel UP/DOWN button or Channel button

01 H POSI OSD 175

(0-9) on the remote control to select the options shown in Fig. 1-2.

Press the INPUT button on the remote control to end the adjustments.

To display the adjustment screen for TV, AV, YUV and HDMI mode, press the INPUT button on the remote control to set to the TV, AV, YUV and HDMI mode. Press the VOL.DOWN button on the set and the channel (9) on the remote control for more than 2 seconds.

Step No.

Fig. 1-1

FUNCTION

NO.

H POSI OSD

V POSI OSD

R DRIVE(N)

R CUT OFF(N)

G DRIVE(N)

G CUT OFF(N)

B DRIVE(N)

B CUT OFF(N)

R DRIVE(C)

R CUT OFF(C)

G DRIVE(C)

G CUT OFF(C)

B DRIVE(C)

B CUT OFF(C)

R DRIVE(W)

R CUT OFF(W)

G DRIVE(W)

G CUT OFF(W)

B DRIVE(W)

B CUT OFF(W)

H POSI 60Hz

V POSI 60Hz

FUNCTION

NO.

BAK LIGHT CENT

BAK LIGHT MAX

BAK LIGHT MIN

BRIGHT CENT

BRIGHT MAX

BRIGHT MIN

TINT

SHARP CENTER

SHARP MAX

SHARP MIN

CONTRAST CENTER

CONTRAST MAX

CONTRAST MIN

COLOR CENT

COLOR MAX

COLOR MIN

CONTRAST 40

BRIGHT (3F54)

CONTRAST(3F54)

SRC TOP

DFEA VIMGT

2. BASIC ADJUSTMENTS

2-1: CONTRAST MAX

Receive the monoscope pattern. (RF Input)

Using the remote control, set the brightness and contrast to normal position.

Activate the adjustment mode display of Fig. 1-1 and press the channel button (36) on the remote control to select "CONTRAST MAX".

Press the LEFT/RIGTH button on the remote control until the contrast step No. becomes "215"

Check if the picture is normal.

Receive the monoscope pattern. (VIDEO Input)

Press the INPUT button on the remote control to set to the AV mode.

Using the remote control, set the brightness and contrast to normal position.

Activate the adjustment mode display of Fig. 2-1 and press the channel button (36) on the remote control to select "CONTRAST MAX".

10.

Press the LEFT/RIGTH button on the remote control until the contrast step No. becomes "222".

11.

Check if the picture is normal.

12.

Playback the DVD(480i) disc. (COMPONENT Input)

13.

Press the INPUT button on the remote control to set to the YUV mode.

14.

Using the remote control, set the brightness and contrast to normal position.

15.

Activate the adjustment mode display of Fig. 2-1 and press the channel button (36) on the remote control to select "CONTRAST MAX".

16.

Press the LEFT/RIGTH button on the remote control until the contrast step No. becomes "213".

17.

Playback the DVD(480i) disc. (HDMI Input)

18.

Press the INPUT button on the remote control to set to the HDMI mode.

19.

Using the remote control, set the brightness and contrast to normal position.

20.

Activate the adjustment mode display of Fig. 1-1 and press the channel button (36) on the remote control to select "CONTRAST MAX".

21.

Press the LEFT/RIGTH button on the remote control until the contrast step No. becomes "213".

22.

Check if the picture is normal.

D-1

Fig. 1-2

ELECTRICAL ADJUSTMENTS

2-2: WHITE BALANCE

Place the set in Aging Test for more than 15 minutes.

Receive the gray scale pattern from the Pattern Generator.

Using the remote control, set the brightness and contrast to normal position.

Activate the adjustment mode display of Fig. 1-1 and press the channel button (03) on the remote control to select "R DRIVE(N)".

Press the CH. UP/DOWN button on the remote control to select the "R CUT OFF(N)", "B DRIVE(N)", "B CUT OFF(N)", "R DRIVE(C)", "R CUT OFF(C)", "B DRIVE(C)", "B CUT OFF(C)", "R DRIVE(W)", "R CUT OFF(W)", "B DRIVE(W)" or "B CUT OFF(W)".

Adjust the LEFT/RIGTH button on the remote control to whiten the R CUT OFF(N), B DRIVE(N), B CUT OFF(N), R DRIVE(C), R CUT OFF(C)", B DRIVE(C), B CUT OFF(C), R DRIVE(W), R CUT OFF(W), B DRIVE(W) or B CUT OFF(W) at each step tone sections equally.

Perform the above adjustments 5 and 6 until the white achieved.

D-2

ELECTRICAL ADJUSTMENTS

2-3: Confirmation of Fixed Value (Step No.)

Please check if the fixed values of each of the adjustment items are set correctly referring below. (TV/AV/YUV/HD-MI)

YUV

TV 720p

NO. FUNCTION

1 H POSI OSD 346 346 346 346 346 346 346 346 346 346 346 346 346 2 V POSI OSD 83 83 83 83 83 83 83 83 83 83 83 83 83 5 G DRIVE (N) 6 G CUTOFF (N) 11 G DRIVE (C) 12 G CUTOFF (C) 17 G DRIVE (W) 18 G CUTOFF (W) 22 H POSI 60Hz 22 H POSI (SIDE BAR) 24 V POSI 60Hz 25 BAK LIGHT CENT 26 BAK LIGHT MAX 27 BAK LIGHT MIN 28 BRIGHT CENT 29 BRIGHT MAX 30 BRIGHT MIN 31 TINT 37 CONTRAST MIN 38 COLOR CENT 39 COLOR MAX 40 COLOR MIN 66 SRC TOP 67 DFEA VIMGVT 21 28 21 21 21 45 29 27 21 44 28 28 43

128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 282 282 282 282 282 282 282 282

35 35 35 35 35 35 128 128 128 128 128 255 255 255 255 255

00 00 00 00 00 00 00 00 00 00 00 00 126 126 126 126 126 126 126 126 126 126 126 126 156 156 156 156 156 156 156 156 156 156 156 156

70 70 70 70 70 70 70 70 70 70 70 70 122 122 117 123 118

50 50 50 50 50 50 50 50 50

68 68 64 63 108 108 108 108

00 00 00 00

21 21 21 21 21 21 21 21 21 21 21 21 21

AV AV (S) 480i 480p 720p 1080i 480i 480p 720p 1080i VGA

Step No.

128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128

128 128 128 284 138 326 130 284

80 108 100 100

130 150 150 150

00 00 00 00 00 00 00 00 00

138 --- --- 272 138 --- ---

55 40 128 128 128 255 255 255

126 130 130

128 128 128 128 272 138 290 238

35 35 50 40 128 128 128 128 255 255 255 255

128 128 130 130 128

67 67 70 70 67 108

HD-MI

128 128 128 128 128 128 128 128 128 128 128 128 128 128 128 128

150 158

---

--126 156

50 50 50 50

108 108 108 108

D-3

ELECTRICAL ADJUSTMENTS

3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)

LCD PANEL

CD3807

CD7204

POWER PCB

CD1004

SPEAKER

CP4202

CD2201

TU001

CP301

CP2201

REMOCON PCB

CD3810

CP3807

CP3810

CP3811

J4401

J301

AV PCB

CD6402

J4402

J4403

CP6401

J4404

J4405

CP6403

J4406

J4407

CD3802

CD3803

CP6402

CD3801

CP4204

CP4203

CD4204

CD4203

CP2200

CP802

CP803

J4302

SCALER PCB

CP7203

CP4302

CP3201

J4301

CD2200

OPERATION PCB

CD6403

D-4

POWER DOES NOT TURN ON

TROUBLESHOOTING GUIDE

IS F3801 BROKEN ?

IS THERE VOLTAGE AT PIN 4 OF IC3801

16.9V ?

YES

IS THERE VOLTAGE AT PIN 2 OF IC3807 AT5V ?

YES

IS THERE VOLTAGE AT EMITTER OF Q3809 AT3.3V ?

YES

CHANGE F3801.

CHECK IC3801 AND PERIPHERAL CIRCUIT.

CHECK IC3807 AND PERIPHERAL CIRCUIT. OR CHANGE POWER PCB.

CHECK Q3809 AND PERIPHERAL CIRCUIT. OR CHANGE POWER PCB.

YES

CHANGE SCALER PCB.

E-1

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