Sharp Lc-26dv20u - 26" lcd tv User manual

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.

MODEL

This document has been published to be used for

after sales service only.

The contents are subject to change without notice.

LCD COLOR TELEVISION/

DVD VIDEO PLAYER

CONTENTS

#########

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

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

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

WHEN REPLACING DVD DECK .........................................................................................

DISC REMOVAL METHOD AT NO POWER SUPPL ..........................................................

PARENTAL CONTROL - RATING LEVEL ...........................................................................

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

DVD DECK EXPLODED VIEWS ..........................................................................................

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

Page

A1-1

A1-2

A1-3

A1-4

A2-1~A2-5

B1-1~B3-2

C-1

C-2

C-3

D-1~D-3

E-1~E-12

F-1~F-14

G-1~G-14

H-1~H-60

I-1~I-4

J-1~J-4

J2-1

K1-1~K3-13

•

LC-26DV20U

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.

3. USE THE DESIGNATED PARTS

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an

electric shock while the electric current is

flowing.

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.

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

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

A1-1

4. BE CAREFUL WITH THE

LCD PANEL

Avoid a shock to the panel while servicing.

Take enough care to deal with it.

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).

IMPORTANT

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.

HOW TO ORDER PARTS

A1-2

Before removing Pick Up PCB and DVD PCB connector, the short circuit the position shown in Fig. 1

using a soldering iron. If you remove the DVD Deck with no soldering, the Laser may be damaged.

WHEN REPLACING DVD DECK

[ When removing the DVD Deck ]

[ When installing the DVD Deck ]

Remove all the soldering on the short circuit position after the connection of Pick Up PCB and DVD

PCB connector.

Fig. 1

Short circuit using a

soldering iron.

Pick Up PCB

NOTE

Before your operation, please read “PREPARATION OF SERVICING”.

Use the Lead Free solder.

Manual soldering conditions

• Soldering temperature: 320 ±20˚C

• Soldering time: Within 3 seconds

• Soldering combination: Sn-3.0Ag-0.5Cu

When Soldering/Removing of solder, use the draw in equipment over the Pick Up Unit to keep the

Flux smoke away from it.

•

Remove the Back Cabinet. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)

Slide the Rack Loading toward the arrow direction by hand to release the lock. (Refer to Fig. 1)

Take out the Disc from the DVD Deck. Be careful not to scratch on the Disc.

DISC REMOVAL METHOD AT NO POWER SUPPLY

Fig. 1

DVD Deck

Rack Loading

PARENTAL CONTROL - RATING LEVEL

4 DIGIT PASSWORD CANCELLATION

A1-3

If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below.

Turn Unit ON.

Set the DVD Mode.

Confirm that the 'No Disc' will be appeared on the screen.

Press and hold the '7' key on the remote control unit.

Simultaneously press and hold the 'STOP' key on the front panel.

Hold both keys for more than 2 seconds.

The On Screen Display message 'PASSWORD CLEAR' will appear.

The 4 digit password has now been cleared

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.

Distinction of PbF PCB:

Recommendations

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

ABOUT LEAD FREE SOLDER (PbF)

•

A1-4

GENERAL SPECIFICATIONS

G-1 TV LCD LCD Size / Visual Size 25.5 inch / 647.7mmV

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) ---

G-2 DVD System Color System NTSC

Disc DVD, CD-DA, CD-R/RW

DVD-R/RW (Video Format Only)

Disc Diameter 120 mm , 80 mm

Drive DSM-2

Search speed Fwd 4 step

Actual 2-45 times (DVD)

4-40 times (CD)

Rev 4 step

Actual 2-45 times (DVD)

4-40 times (CD)

Slow speed Fwd 1/7 -1/2 times

Actual --

Rev 1/7 -1/2 times

Actual --

G-3 Tuning Broadcasting System Analog US System M

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

G-4 Signal Video Signal Input Level 1 V p-p/75 ohm

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 0.85 V p-p/1k ohm

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) 90dB

Harmonic Distortion 0.02% (1KHz)

Frequency Response : at DVD 4Hz - 22kHz

at Video CD --

at SVCD --

at CD 4Hz - 20kHz

G-5 Power Power Source AC 120V, 60Hz

DC --

Power Consumption at AC 155W 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

G-6 Regulation Safety UL/CSA/NOM

Radiation FCC/IC

Laser DHHS

G-7 Temperature Operation +5oC ~ +40oC

Storage -20oC ~ +60oC

G-8 Operating Humidity Less than 80% RH

A2-1

GENERAL SPECIFICATIONS

G-9 Clock and Clock 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

G-10 Remote Unit RC-MR

Control Glow in Dark Remocon No

Remocon Format SHARP

Format TV:SHARP, DVD:KASEIKYO

Custom Code TV:SHARP 15bit, DVD:KASEIKYO 48bit

Power Source Voltage(D.C) 3V

UM size x pcs UM-3 x 2 pcs

Total Keys 47 Keys

Keys POWER Yes

DISPLAY Yes

SLEEP Yes

VIEW MODE Yes

INPUT SELECT Yes

1Yes

2Yes

3Yes

4Yes

5Yes

6Yes

7Yes

8Yes

9Yes

0Yes

MUTE Yes

AUDIO Yes

VOL+ Yes

VOL- Yes

CH+ Yes

CH- Yes

LEFT/SLOW- Yes

ENTER Yes

RIGHT/SLOW+ Yes

UP Yes

DOWN Yes

SETUP/TV MENU Yes

EXIT/CANCEL Yes

RETURN

･Yes

/SUBTITLE Yes

TV/DVD Yes

OPEN/CLOSE(EJECT) Yes

FWD(SEARCH+) Yes

REV(SEARCH-) Yes

SKIP+ Yes

SKIP- Yes

PAUSE/STILL Yes

PLAY Yes

STOP Yes

PLAY MODE Yes

ANGLE Yes

ZOOM Yes

DVD MENU Yes

TOP MENU Yes

REPAT A-B Yes

MARKER Yes

DIRECT SKIP(JUMP) Yes

FREEZE No

A2-2

GENERAL SPECIFICATIONS

G-11 Features Auto Shut Off Yes

(TV) Auto Search No

Power On Memory No

Comb Filter Yes

3 -D

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

Audio MTS Yes

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

Tuning CH Program Yes

Air/Cable Yes

ADD/DELETE Yes

Label CH Label Yes

Video Label Yes

Favorite CH No

V-Chip Yes

Type USA/CANADA Type

RRT Setup Yes

Lock Hotel Lock No

Channel Lock No

Video Lock No

Panel Lock No

OSD Language

English

French

Closed Caption Yes

CC Advanced Yes

View Mode (Picture Size) Yes

Picture Scroll Yes

Cinema Mode Yes

Aspect Yes

Backlight Yes

PFC(Power Factor circuit) No

Freeze frame No

PIP/POP No

Direct Input Selection Yes

Digital Out Dolby Digital Yes

MPEG No

PCM Yes

DTS No

PC Monitor Input 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

HDMI Input Yes

×VGA

(

640 480

)

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)

A2-3

GENERAL SPECIFICATIONS

Component Input Yes

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)

Features Video CD Playback No

(DVD) SVCD Playback No

MP3 Playback Yes

JPEG Yes

WMA Yes

Digital Out (Dolby Digital) Yes

(MPEG) Yes

(PCM) Yes

(DTS) Yes

Down Mix Out (Dolby Digital) Yes

(DTS) No

Closed Caption Yes

Screen Saver No

Audio DAC 192kHz / 24bit

G-12 Accessories Owner's Manual Language English/French/Spanish

w/Guarantee Card Yes

Remote Control Unit Yes

Rod Antenna No

Poles --

Terminal --

Loop Antenna No

Terminal --

U/V Mixer No

DC Car Cord (Center+) No

Guarantee Card No

Warning Sheet No

Circuit Diagram No

Antenna Change Plug No

Service Facility List No

Important Safeguard No

Dew/AHC Caution Sheet No

Quick Set-up Sheet No

Battery Yes

UM size x pcs UM-3 x 2 pcs

OEM Brand No

AC Adapter No

AC Cord (for AC Adapter) No

AC Cord (Flat Polarity Plugs) Yes

Cable Cramp Yes

Stand Yes

Stand Screw Yes

Hexagon Wrench Yes

AV Cord (2Pin-1Pin) No

Registration Card (NDL Card) Yes

300 to 75ohm Antenna Adapter No

A2-4

GENERAL SPECIFICATIONS

G-13 Interface Switch Top Power (Tact) Yes

Channel Up/Menu Up Yes

Channel Down/Menu Down Yes

Volume Up/Menu > Yes

Volume Down/Menu < Yes

Menu No

Play Yes

Eject Yes

Skip+, Search+ Yes

Skip-, Search- Yes

Still/Pause No

Stop Yes

Main Power SW No

Input Select Yes

Rear Main Power SW No

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

On Timer No

Terminals Rear Video Input 1 RCA x 1

Audio Input 1 RCA x 2(L/MONO, R)

S - Input 1 Yes

Video Input 2 RCA x 1

Audio Input 2 RCA x 2(L/MONO, R)

S - Input 2 Yes

Video Output No

Audio Output RCA x 2 (Variable) (L, R)

Component Input 1 RCA x 3

Analog Audio RCA x 2(L/MONO, R)

Component Input 2 No

Analog Audio No

HDMI Input HDMI x 1

Analog Audio RCA x 2(L/MONO, R)

Sub Woofer Out No

PC Monitor Input No

Analog Audio No

Digital Audio Output Coaxial

DC Jack (Center +) No

VHF/UHF Antenna Input F Type

AC Inlet Yes

Side Video Input 3 No

Audio Input 3 No

S - Input 3 No

Other Terminal No

G-14 Set Size Approx. W x D x H (mm) 682.5 x 282.5 x 565

w/o Handle, Stand Approx. W x D x H (mm) 682.5x 111.5 x 506

G-15 Weight Net (Approx.) 16.0kg (35.3lbs)

Net w/o Handle, Stand (Approx.) 13.5kg (29.8lbs)

Gross (Approx.) 20.0kg (44.1lbs)

G-16 Carton Master Carton No

Content --- Sets

Material --- / ---

Dimensions W x D x H(mm) ---

Description of Origin ---

Gift Box Material Double/Brown

W/Color Photo Label No

W/Handle No

Dimensions W x D x H(mm) 781 x 255 x 622

Description of Origin Yes

Drop Test 1 Corner / 3 Edges / 6 Surfaces

Height (cm) 32(ORION SPEC:46)

Container Stuffing (40' container) 405 Sets/40' container

G-17 Material Cabinet Front PS 94V0 NON-DECABROM

Rear PS 94V0 NON-DECABROM

Jack Panel --

PCB Non-Halogen Demand No

Eyelet Demand Yes

G-18 Environment Environmental standard requirement Green procurement of SHARP

Pb-free Phase3(Phase3A)

Measures for Whisker Yes

Rohs Yes

A2-5

DISASSEMBLY INSTRUCTIONS

B1-1

1. REMOVAL OF MECHANICAL PARTS

AND P.C. BOARDS

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

2. Remove the 19 screws 1.

Remove the Back Cabinet in the direction of arrow.

Fig. 1-1

Back Cabinet

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

10.

11.

12.

13.

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).

Remove the 2 screws 4.

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

Remove the 5 screws 5.

Remove the Plate Button and Operation PCB in the

direction of arrow (E).

Fig. 1-3

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 6 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).

Fig. 1-2

Stand Ass'y

Angle Back 2

Angle Back 1

Plate Jack 2

Plate Jack 1

Shield Jack

(A)

(B) (C)

(D)

STAND ASS'Y/ANGLE BACK 1/2/PLATE JACK 1/2

(Refer to Fig. 1-2)

Holder AC-Inlet

Power PCB

(A)

222

Shield Scaler

Scaler PCB

Digital PCB

AV PCB

(B)

(C)

Remocon PCB

(D)

(E)

Operation PCB

Plate Button

DISASSEMBLY INSTRUCTIONS

B1-2

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).

Fig. 1-4

Front Cabinet

(A)

LCD Cover

LCD Panel

(B)

DISASSEMBLY INSTRUCTIONS

B2-1

2. REMOVAL OF DVD DECK PARTS

2-1: TRAVERSE ASS'Y (Refer to Fig. 2-1-A)

Remove the 3 screws 1.

Unlock the 2 supports 2.

Remove the Insulator (R) from the Loader Sub Ass'y.

Remove the Traverse Ass'y.

Fig. 2-1-A

Insulator (R)

NOTE

1. Disassemble only the DVD DECK PARTS parts listed

here. Minute adjustments are needed if the

disassembly is done. If the repair is needed except

listed parts, replace the DVD MECHA ASS'Y.

Loader Sub Ass'y

Traverse Ass'y

Fig. 2-1-B

• Screw Torque: 2.0 ±0.3kgf•cm 1

NOTE

1. In case of the Traverse Ass'y installation, hook the wire

on the Loader Ass'y as shown Fig. 2-2-B to Fig. 2-2-D.

2-2:

Remove the Insulator (F).

Remove the Insulator (R).

Unlock the support 1.

Remove the Gear Middle.

Remove the screw 2.

Remove the Rack Feed Ass'y.

Remove the screw 3.

Remove the Switch PCB Ass'y.

Remove the screw 4.

Remove the Gear Feed.

Remove the 2 screws 5.

Remove the Feed Motor.

Remove the Gear Motor.

10.

11.

12.

13.

SWITCH PCB ASS'Y/GEAR MIDDLE/GEAR FEED/RACK

FEED ASS'Y/FEED MOTOR (Refer to Fig. 2-2-A)

Gear Middle

Gear Motor

Feed Motor

• Screw Torque: 1.3 ±0.3kgf•cm (Screw 2)

• Screw Torque: 3.0 ±0.3kgf•cm (Screw 3)

• Screw Torque: 1.0 ±0.3kgf•cm (Screw 4, 5)

Switch PCB Ass'y

Rack Feed Ass'y

Gear Feed

Fig. 2-2-A

Traverse Ass'y

Insulator (R)

Insulator (F)

NOTE

When installing the Rack Feed Ass'y, push both ends to

align the teeth as shown Fig. 2-2-B. Then install it.

In case of the Gear Motor installation, check if the value

of the Fig. 2-2-C is correct.

When installing the wire of the Switch PCB Ass'y, install

it correctly as Fig. 2-2-D.

Manual soldering conditions

• Soldering temperature: 350 ±5˚C

• Soldering time: Within 4 seconds

• Soldering combination: Sn-3.0Ag-0.5Cu

After the assembly of the Traverse Ass'y, hook the wire

on the Traverse Ass'y as shown Fig. 2-2-E.

[OK] [NG]

Fig. 2-2-B

Rack Feed Ass'y

Push

Fig. 2-1-D

Loader Ass'y (Top Side)

Check Hook

Loader Ass'y (Bottom Side)

Check Lock Check Lock

Fig. 2-1-C

Loader Ass'y

40 ±5mm

3 ±1mm

Check Hook

Check Hook Check Hook

DISASSEMBLY INSTRUCTIONS

B2-2

To Pick Up PCB Printing Surface

Fold it by 90˚

60 ±1mm

[ 24 pin FFC ]

When installing the FFC, fold it correctly and install it as

shown from Fig. 2-3-A to Fig. 2-3-B.

2-3: FFC WIRE HANDLING

Do not make the folding lines except the specified

positions for the FFC.

NOTE

Fig. 2-3-A

Traverse Ass'y

Check Hook

Fig. 2-2-E

• Loosen the wire in the direction of the arrow.

Check Hook

~ FEED MOTOR ~

WHITE (4)

BROWN (3)

~ SPINDLE MOTOR ~

YELLOW (2)

GREEN (1)

Fig. 2-2-D

Switch PCB Ass'y

•Install wire from (1) to (4) in order.

Fold

40 ±1mm

Fig. 2-2-C

8.0 ±0.2mm

Safety surface for pressing

of the insert.

Feed Motor

Gear Motor

[ 6 pin FFC ]

Fig. 2-3-B

Printing Surface

B3-1

Masking Tape

(Cotton Tape)

DISASSEMBLY INSTRUCTIONS

REMOVAL

Put Masking Tape (cotton tape) around the Flat Package

IC to protect other parts from any damage.

(Refer to Fig. 3-1.)

Fig. 3-1

NOTE

REMOVAL AND INSTALLATION OF

FLAT PACKAGE IC

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.

NOTE

Masking is carried out on all the parts located within

10 mm distance from IC leads.

Blower type IC

desoldering machine

Heat the IC leads using a blower type IC desoldering

machine. (Refer to Fig. 3-2.)

Fig. 3-2

NOTE

Do not rotate or move the IC back and forth , until IC

can move back and forth easily after desoldering the

leads completely.

When IC starts moving back and forth easily after

desoldering completely, pickup the corner of the IC using

tweezers and remove the IC by moving with the IC

desoldering machine. (Refer to Fig. 3-3.)

Blower type IC

desoldering

machine

IC Fig. 3-3

Tweezers

Peel off the Masking Tape.4.

Absorb the solder left on the pattern using the Braided

Shield Wire. (Refer to Fig. 3-4.)

NOTE

Do not move the Braided Shield Wire in the vertical

direction towards the IC pattern.

Braided Shield Wire

Soldering Iron

Fig. 3-4

IC pattern

B3-2

DISASSEMBLY INSTRUCTIONS

Supply soldering

from upper position

to lower position

Supply the solder from the upper position of IC leads

sliding to the lower position of the IC leads.

(Refer to Fig. 3-6.)

Fig. 3-6

Soldering IronSolder

Absorb the solder left on the lead using the Braided

Shield Wire. (Refer to Fig. 3-7.)

Fig. 3-7

Soldering Iron

Braided Shield Wire

NOTE

Do not absorb the solder to excess.

When bridge-soldering between terminals and/or the

soldering amount are not enough, resolder using a Thin-

tip Soldering Iron. (Refer to Fig. 3-8.)

Fig. 3-8

Thin-tip Soldering Iron

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.

Finally, confirm the soldering status on four sides of the

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.

Solder temporarily

Soldering Iron

INSTALLATION

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

new IC fitting on the printed circuit pattern. Then solder

each lead on the diagonal positions of IC temporarily.

(Refer to Fig. 3-5.)

Fig. 3-5

Solder temporarily

C-1

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.)

Releasing of V-CHIP PASSWORD.

Initialization of factory TV data.

NOTE: If you set factory initialization, the memories are reset

such as the channel setting, and the POWER ON total

hours.

Can be checked of the INITIAL DATA of MEMORY IC.

Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".

Set Key Operations

VOL. DOWN

(Minimum)

Remocon

Key

0 2 sec.

VOL. DOWN

(Minimum) 1 2 sec.

Standard

Time

VOL. DOWN

(Minimum) 6 2 sec.

VOL. DOWN

(Minimum) 9 2 sec.

Set

Condition

TV mode

ALL mode

TV mode

Display of the Adjustment MENU on the screen.

Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display

Adjustment).

VOL. DOWN

(Minimum) 8

ALL mode 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".

2 sec.

Initialization of factory DVD data.

NOTE: Do not use this for normal servicing.

VOL. DOWN

(Minimum) 4 2 sec.

DVD mode

(No disc)

STOP 7 2 sec.

DVD mode

(No disc) Releasing of PARENTAL LOCK.

Refer to the “PARENTAL CONTROL - RATING LEVEL”.

C-2

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:

INIT : C7C3

ROM : 0000

ADC : 8F97

DVP1 : F5EB *1

DVP2 : 29EF

LCD ON 0000

OEC7155B_004

DTV d0l63041

FIG. 1

Initial setting 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

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, POWER ON

total hours, MICON VERSION and Digital TV MICON

Firmware, turn off the power.

*1 DVP1 is different according to each set.

Rom correction data check sum.

AD CONVERTER data check sum.

WHEN REPLACING EEPROM (MEMORY) IC

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.

SCALER data check sum.

Digital TV MICON Firmware

10.

11.

12.

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

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

until required ADDRESS to be changed is reached.

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.

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

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

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.

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

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

ADDRESS DATA

INIT 0000 00

LCD ON 0000

OEC7155B_004

DTV d0l63041

FIG. 2

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.

Set the VOLUME to minimum.

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

ADDRESS and DATA should appear as FIG 2.

CONFIRMATION OF INITIAL DATA

C-3

SET (REAR)

RE-WRITE FOR DIGITAL SOFT FIRMWARE

Ref. No. Part No. Parts Name Remarks

JG176

Up-Date of the Firmware

APJG176095JG176 USA HD DTV ROM

DISC

NOTE:

USA HD DTV ROM

DISC

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

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)

USB CONNECTOR

ELECTRICAL ADJUSTMENTS

D-1

1. ADJUSTMENT PROCEDURE

Read and perform these adjustments when repairing the

circuits or replacing electrical parts or PCB assemblies.

CAUTION

On-Screen Display Adjustment

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.

Fig. 2-1

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, YUV, HDMI

mode, press the INPUT button on the remote control to

set to the AV, YUV, HDMI mode. Press the VOL.DOWN

button on the set and the channel (9) on the remote

control for more than 2 seconds.

FUNCTION

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)

NO.

•

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 (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).

2. BASIC ADJUSTMENTS

NO.

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)

CONTRAST (3F55)

SRC TOP

DFEA VIMGVT

Prepare the following measurement tools for electrical

adjustments.

1. Pattern Generator

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.

01 H POSI OSD 346

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Sharp LC-26DV20U - 26" LCD TV User manual