SHARP LC32SH20U Service Manual

#########

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 ....................................................................

•

RE-WRITE FOR DIGITAL SOFT FIRMWARE .....................................................................

•

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

•

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

•

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

•

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

•

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

•

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

•

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

•

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

•

LC-32SH20U

Page A1-1 A1-1 A1-1 A1-2 A2-1~A2-5 B1-1~B2-2 C-1 C-2 C-3 D-1~D-3 E-1~E-7 F-1~F-10 G-1~G-14 H-1~H-52 I-1~I-3 J-1~J-4 K1-1~K2-11

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 31.5 inch / 800.4mmV

G-2 Tuning Broadcasting System Analog US System M

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

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

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

System LCD Type Color TFT LCD

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

View Range Left/Right 85/85 degree

Up/Down 85/85 degree Color System NTSC Speaker 2 Speaker

Position Front Size 2.2 x 5.0 inch Impedance 4 ohm

Sound Output Max 10W + 10W

10%(Typical) ---

System Digital ATSC(8VSB)/QAM

Tuner and System 1Tuner Receive CH Destination US (W/CABLE)

CH Coverage 2~69, 4A, A-5~A-1, A~I, J~W, W+1~W+84 Intermediate Digital 44.00MHz Frequency Analog Picture(FP) 45.75MHz

Sound(FS) 41.25MHz

FP-FS 4.50MHz Preset CH No Stereo/Dual TV Sound US-Stereo Tuner Sound Muting Yes

Output Level --

S/N Ratio (Weighted) --

Horizontal Resolution at DVD Mode --

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

Output Level at DVD --

at TV 0.85 V p-p/1k ohm

0-1.70 V p-p/1k ohm (Variable out mode) Digital Output Level 0.5 V p-p/75 ohm S/N Ratio at DVD (Weighted) -Harmonic Distortion -Frequency Response : at DVD --

at Video CD --

at SVCD --

at CD --

DC --

Power Consumption at AC 170W at 120V 60Hz

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

Protector Power Fuse Yes

Safety Circuit Yes IC Protector(Micro Fuse) Yes

Radiation FCC/IC Laser --

Storage -20oC ~ +60oC

Yes

Timer Sleep Timer Max Time 120 Min

Step 10 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

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 40 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 . ENT INPUT FLASH BACK VOL+ VOLCH+ CHSURROUND MUTE FREEZE MENU LEFT ENTER RIGHT UP DOWN EXIT RETURN FAVORITE A FAVORITE B FAVORITE C FAVORITE D FAVORITE SLEEP AUDIO AV MODE CC

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 Yes

No No

No No No No No No No No No

A2-2

GENERAL SPECIFICATIONS

(

)

G-10 Features Auto Shut Off Yes

Auto Search No Power On Memory No Comb Filter Yes

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

Picture Setting(PC) No

Audio MTS Yes

Tuning CH Program Yes

Label CH Label Yes Favorite CH Yes

V-Chip Yes RRT Setup

Lock Hotel Lock No

OSD Language Closed Caption CC Advanced View Mode (Picture Size) Yes Picture Scroll Yes Cinema Mode Yes Aspect Yes Backlight Yes PFC(Power Factor circuit) Freeze frame Yes PIP/POP No Direct Input Selection Yes Digital Out Dolby Digital Yes

PC Monitor Input No

HDMI Input Yes

Component Input Yes

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

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

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

Air/Cable Yes ADD/DELETE Yes

Video Label Yes

Type

Channel Lock No Video Lock No Panel Lock No

MPEG No PCM Yes DTS No

VGA (640x480) No VGA (720x400) No WVGA (848x480) No SVGA (800x600) No XGA (1024x768) No WXGA (1280x768) No WXGA (1280x720) No WXGA (1360x768) No SXGA (1280x1024) No

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)

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

3 -D

USA Type Yes

English French Spanish Yes Yes

A2-3

60Hz

GENERAL SPECIFICATIONS

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) AC Cord (Flat Polarity Plugs) Yes Cable Cramp Yes Stand Yes Stand Screw Yes Hexagon Wrench Yes AV Cord (2Pin-1Pin) Registration Card (NDL Card) 300 to 75ohm Antenna Adapter

G-12 Interface Switch Top Power (Tact) Yes

Rear Main Power SW No

Indicator Power/Stand-By Yes (Green / Red)

Terminals Rear Video Input 1 RCA x 1

Side Video Input 3 No

G-13 Set Size Approx. W x D x H (mm) 818 x 273.5 x 647

w/Guarantee Card Yes

Poles -Terminal --

Terminal --

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

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

On Timer No

Audio Input 1 RCA x 2(L/MONO, R) S - Input 1 Video Input 2 RCA x 1 Audio Input 2 RCA x 2(L/MONO, R) S - Input 2 Video Output No Audio Output Component Input 1 Analog Audio RCA x 2(L/MONO, R) Component Input 2 No Analog Audio No HDMI Input 1 Analog Audio RCA x 2(L/MONO, R) HDMI Input 2 No Analog Audio No Sub Woofer Out No PC Monitor Input No Analog Audio No Digital Audio Output Coaxial DC Jack (Center +) No VHF/UHF Antenna Input AC Inlet

Audio Input 3 No S - Input 3 No Other Terminal No

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

Yes

RCA x 2 (Variable) (L, R) RCA x 3

HDMI x 1

F Type Yes

818 x 116.5 x 590

No No No No No No No No No No

No No

No Yes No

A2-4

GENERAL SPECIFICATIONS

G-14 Weight Net (Approx.) 17.1kg (37.7lbs)

G-15 Carton Master Carton No

Gift Box Material Double/Brown

Drop Test 1 Corner / 3 Edges / 6 Surfaces

Container Stuffing (40' container) 327

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

PCB Non-Halogen Demand No

G-17 Environment Environmental standard requirement Green procurement of SHARP

Pb-free Phase3(Phase3A)

Rohs Yes

Net w/o Handle, Stand (Approx.) 15.0kg (33.1lbs) Gross (Approx.) 20.4kg (45.0lbs)

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) 917 x 271 x 716 Description of Origin Yes

Height (cm) 32(ORION SPEC:46)

Sets/40' container

Rear PS 94V0 NON-DECABROM Jack Panel --

Eyelet Demand Yes

Measures for Whisker Yes

A2-5

DISASSEMBLY INSTRUCTIONS

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

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

1.2.Remove the 19 screws 1.

Remove the Back Cabinet in the direction of arrow.

Back Cabinet

Angle Back 2

Fig. 1-1

Stand Ass'y

1-2:

STAND ASS'Y/ANGLE BACK 1/2/PLATE JACK 1/2 (Refer to Fig. 1-2)

Remove the 4 screws 1.

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

Remove the 4 screws 2.

Remove the 7 screws 3.

Remove the Angle Back 1/2 in the direction of arrow (B).

Remove the 4 screws 4.

Remove the Plate Jack 2 in the direction of arrow (C).

Remove the 11 screws 5.

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

Angle Back 1

1-3: PCB ASS'Y (Refer to Fig. 1-3)

Disconnect the following connectors: (CP506, CP507, CP508, CP510, CP511, CP512).

Remove the 9 screws 1.

Remove the Holder AC-Inlet and Power PCB in the direction of arrow (A).

Disconnect the following connectors: (CP802, CP803, CP2200, CP3201, CP3602, CP7203).

Remove the 10 screws 2.

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

Disconnect the following connectors: (CP301, CP302, CP2403, CP2404, CP4202).

Remove the 6 screws 3.

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

10.

Remove the 2 screws 4.

11.

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

12.

Remove the 5 screws 5.

13.

Remove the Plate Button and Operation PCB in the direction of arrow (E).

Holder AC-Inlet

Power PCB

(A)

(E)

Plate Button

Operation PCB

Shield Scaler

Scaler PCB

(B)

(C)

Digital PCB

(D)

AV PCB

Remocon PCB

Fig. 1-3

(B)

Plate Jack 2

(C)

(A)

(D)

Plate Jack 1

Shield Jack

Fig. 1-2

B1-1

DISASSEMBLY INSTRUCTIONS

1-4: LCD COVER/LCD PANEL (Refer to Fig. 1-4)

Remove the 8 screws 1.

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

Remove the 4 screws 2.

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

Front Cabinet

(B)

(A)

LCD Cover

LCD Panel

Fig. 1-4

B1-2

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 is 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 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:

Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".

Check of the SUM DATA, POWER ON total hours, MICON VERSION and DIGITAL TV MICON FIRMWARE 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, MICON VERSION AND DIGITAL TV MICON FIRMWARE

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

NOTE:

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.

INIT : C80F

Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds.

ROM : 0000

After the confirmation of each check sum, POWER ON total hours, MICON VERSION and Digital TV MICON Firmware, turn off the power.

*1 DVP1 is different according to each set.

ADC : 8F97 DVP1 : F8B4 *1 DVP2 : 32A1

Initial setting 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)

MICON Version

Digital TV MICON Firmware

LCD ON 0000 OEC7154A_036 DTV d-l62155

FIG. 1

CONFIRMATION OF INITIAL DATA

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 2.

ADDRESS DATA

INIT 0000 B4 LCD ON 0000 OEC7154A_036 DTV d-l62155

FIG. 2

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

4. until required ADDRESS to be changed is reached. Press RIGHT/LEFT button to select DATA. When DATA is selected, it will "blink".

5. Again, step through the DATA using UP/DOWN button until required DATA value has been selected.

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

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

8. 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.

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

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

12.

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

C-2

RE-WRITE FOR DIGITAL SOFT FIRMWARE

JG176

Ref. No.

NOTE:

Prepare the following tools for Up-Date of the Firmware.

1 Computer of WINDOWS2000 2 USB Flash Memory (Use only SanDisk Cruzer Mini USB Flash Drive 256Mb)

USA HD DTV ROM DISC

Part No. Parts Name

APJG176095JG176

The operating manual for Re-writing is included in USA HD DTV ROM DISC (JG176).

USA HD DTV ROM DISC

Up-Date of the Firmware

SET (REAR)

Remarks

USB CONNECTOR

C-3

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.

•

Prepare the following measurement tools for electrical adjustments.

1. Pattern Generator

2. BASIC ADJUSTMENTS

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. 2-1.

AUTO

01 H POSI OSD

Use the UP/DOWN button or Channel button (0-9) on the remote control to select the options shown in Fig. 2-2.

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

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

346

Fig. 2-1

NO.

FUNCTION

NO.

H POSI OSD

V POSI OSD

R DRIVE (N)

R CUTOFF (N)

G DRIVE (N)

G CUTOFF (N)

B DRIVE (N)

B CUTOFF (N)

R DRIVE (C)

R CUTOFF (C)

G DRIVE (C)

G CUTOFF (C)

B DRIVE (C)

B CUTOFF (C)

R DRIVE (W)

R CUTOFF (W)

G DRIVE (W)

G CUTOFF (W)

B DRIVE (W)

B CUTOFF (W)

FUNCTION

H POSI 60Hz

V POSI 60Hz

BAK LIGHT CENT

BAK LIGHT MAX

BAK LIGHT MIN

BRIGHT CENT

BRIGHT MAX

BRIGHT MIN

TINT

CONTRAST CENTER

CONTRAST MAX

CONTRAST MIN

COLOR CENT

COLOR MAX

COLOR MIN

CONTRAST 40

BRIGHT (3F54)

CONTRASR (3F54)

SRC TOP

DFEA VIMGVT

Fig. 2-2

2-1: WHITE BALANCE

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

Receive the gray scale pattern from the Pattern Generator.

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. 1-1 and press the channel button (03) on the remote control to select “R DRIVE (N)”.

Press the UP/DOWN button on the remote control to select the “R CUTOFF (N)”, “B DRIVE (N)”, “B CUTOFF (N)”, “R DRIVE (C)”, “R CUTOFF (C)”, “B DRIVE (C)”, “B CUTOFF (C)”, “R DRIVE (W)”, “R CUTOFF (W)”, “B DRIVE (W)” and “B CUTOFF (W)”.

Adjust the RIGHT/LEFT button on the remote control to whiten the R CUTOFF (N), B DRIVE (N), B CUTOFF (N), R DRIVE (C), R CUTOFF (C), B DRIVE (C), B CUTOFF (C), R DRIVE (W), R CUTOFF (W), B DRIVE (W) and B CUTOFF (W) at each step tone sections equally.

Perform the above adjustments 5 and 6 until the white color is looked like a white.

D-1

ELECTRICAL ADJUSTMENTS

2-2: 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/CS/HD-MI)

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 85 85 85 85 85 85 85 85 85 85 85 85 85 5 G DRIVE (N) 128 128 128 128 128 128 128 128 128 128 128 128 128 6 G CUTOFF (N) 128 128 128 128 128 128 128 128 128 128 128 128 128 11 G DRIVE (C) 128 128 128 128 128 128 128 128 128 128 128 128 128 12 G CUTOFF (C) 128 128 128 128 128 128 128 128 128 128 128 128 128 17 G DRIVE (W) 128 128 128 128 128 128 128 128 128 128 128 128 128 18 G CUTOFF (W) 128 128 128 128 128 128 128 128 128 128 128 128 128 22 H POSI 60Hz 284 326 284 284 284 138 328 132 272 138 290 238 158 24 V POSI 60Hz 34 59 34 34 34 34 56 42 36 35 62 42 35 25 BAK LIGHT CENT 128 128 128 128 128 128 128 128 128 128 128 128 128 26 BAK LIGHT MAX 255 255 255 255 255 255 255 255 255 255 255 255 255 27 BAK LIGHT MIN 00 00 00 00 00 00 00 00 00 00 00 00 00 28 BRIGHT CENT 126 126 126 126 126 126 126 126 126 126 126 126 126 29 BRIGHT MAX 156 156 156 156 156 156 156 156 156 156 156 156 156 30 BRIGHT MIN 70 70 70 70 70 70 70 70 70 70 70 70 70 31 TINT 128 128 114 120 128 128 128 128 132 132 132 132 132 35 CONTRAST CENTER --- --- --- --- --- --- --- --- 119 119 119 116 119 36 CONTRAST MAX --- --- --- --- --- --- --- --- 164 164 164 164 164 37 CONTRAST MIN --- --- --- --- --- --- --- --- 50 50 50 50 50 38 COLOR CENT 70 110 88 80 83 104 440 440 73 73 73 73 73 39 COLOR MAX 127 127 127 127 127 127 127 127 127 127 127 127 127 40 COLOR MIN 00 00 00 00 00 00 00 00 00 00 00 00 00 63 CONTRAST 40 --- --- --- --- --- --- --- --- 156 156 156 156 156 64 BRIGHT (3F54) 121 128 123 122 122 128 128 128 118 117 118 118 113 65 CONTRAST (3F54) --- --- --- --- --- 170 170 170 113 113 113 113 118 66 SRC TOP 21 21 21 21 21 21 21 21 21 21 21 21 21 67 SRC TOP 21 28 21 21 21 45 29 27 21 44 28 28 43

Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No. Step No.

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

HD-MI

D-2

ELECTRICAL ADJUSTMENTS

3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)

LCD PANEL

CP512

CP511

DIGITAL PCB

CP2403

REMOCON PCB

OS2200

CP2201

SPEAKER

CP510

CP507

CP508

POWER PCB

CP301 CP303

J4205

J4201

J4202

CP506

AV PCB

CP901

J4211

J502

CP3801

CP3808

J4204

AC IN

CP3803

CP3807

TU5801

CP5802

CP5801

CP3802

CP3804

CP4202

CP4204

CP4203

CP2404

CD4204

CD4203

CP802

CP803

SCALER PCB

OPERATION PCB

CP2203

CP7203

J4301

CP3601

CP3201CP2200

CP3602

CP3603

D-3

POWER DOES NOT TURN ON

TROUBLESHOOTING GUIDE

IS F501 BROKEN ?

IS THERE VOLTAGE AT PIN 4 OF IC503

20.5V ?

YES

IS THERE VOLTAGE AT PIN 4 OF IC506 AT5V ?

YES

IS THERE VOLTAGE AT PIN 2 OF IC3804 AT3.3V ?

YES

CHANGE F501.

CHECK IC503 AND PERIPHERAL CIRCUIT.

CHECK IC506 AND PERIPHERAL CIRCUIT. OR CHANGE POWER PCB.

CHECK IC3804 AND PERIPHERAL CIRCUIT. OR CHANGE AV PCB.

YES

CHANGE SCALER PCB.

E-1

THE PICTURE DOES NOT APPEAR (1).

TROUBLESHOOTING GUIDE

DOSE BACK LIGHT SHINE ?

YES

IS CD7204 CONNECTED ?

YES

IS THERE SIGNAL AT CP7203 ?

IS THERE SIGNAL AT IC7201 ?

YES

IS THERE VOLTAGE AT PINS 1, 2, 3, 4 AND 5 OF CP505 24V ?

YES

CONNECT CD7204.

CHECK IC502, T502 AND PERIPHERAL CIRCUIT.

CHANGE V2301.

CHANGE IC7201.

YES

CHECK IC801. OR CHANGE SCALER PCB.

E-2

THE PICTURE DOES NOT APPEAR (2).

TROUBLESHOOTING GUIDE

IS THERE SIGNAL AT IC4201 ?

YES

IS CD4203 CONNECTED AND IS THERE SIGNAL ?

YES

CHECK IC801 AND PERIPHERAL CIRCUIT.

CHECK IC4201 AND PERIPHERAL CIRCUIT.

CONNECT CD4203. CHECK IC4201 AND PERIPHERAL CIRCUIT.

E-3

THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEAR.

TROUBLESHOOTING GUIDE

IS CD301 AND CD303 CONNECTED ?

YES

IS THERE SIGNAL CD301 AND CD303 ?

IS THERE SIGNAL AT PINS 11 AND 15 OF IC301 ?

IS THERE SIGNAL AT PINS 27 AND 28 OF IC904 ?

YES

CONNECT CD301 AND CD303.

CHANGE SP301 AND SP302.

CHECK IC301 AND PERIPHERAL CIRCUIT.

CHECK IC904 AND PERIPHERAL CIRCUIT.

YES

CHANGE AV PCB.

E-4

THE STOP PICTURE "PLEASE WAIT".

TROUBLESHOOTING GUIDE

IS CD3806 CONNECTED ?

YES

IS DIGITAL PCB CONNECTED ?

YES

IS THERE VOLTAGE AT PINS 1 AND 2 OF CD3806 5V ?

YES

CHANGE DIGITAL PCB.

CONNECT CD3806.

CONNECT DIGITAL PCB.

CHECK Q512, IC509 AND PERIPHERAL CIRCUIT.

E-5

THE COLOR DOES NOT APPEAR.

TROUBLESHOOTING GUIDE

IS SETTING OF COLOR NORMAL ?

YES

IS THE COLOR SIGNAL RECEIVED ?

YES

IS THERE SIGNAL AT IC801 ?

YES

IS THERE SIGNAL AT IC7201 ?

CHANGE THE SETTING OF COLOR.

RECEIVE THE COLOR SIGNAL.

CHECK IC801 AND PERIPHERAL CIRUCUIT.

CHECK IC7201 AND PERIPHERAL CIRUCUIT.

YES

CHANGE SCALER PCB.

E-6

ON SCREEN DISPLAY DOES NOT APPEAR.

TROUBLESHOOTING GUIDE

IS THERE SIGNAL AT PINS 2, 3, 4 AND 5 OF IC101 ?

YES

IS THE COLOR SIGNAL AT PINS 57, 58, 59 AND 60 OF IC801 ?

YES

CHANGE SCALER PCB.

CHECK IC101 AND PERIPHERAL CIRCUIT.

CHECK IC801AND PERIPHERAL CIRCUIT.

E-7

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