Sharp LC-20S5E-BK Schematic

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

•

HOTEL MODE FUNCTION ..................................................................................................

•

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-20S5E-BK

Page A1-1 A1-1 A1-1 A1-2 A1-3 A2-1~A2-5 B1-1~B2-2 C-1 C-2 C-3 D-1~D-4 E-1~E-7 F-1~F-8 G-1~G-8 H-1~H-24 I-1~I-3 J-1~J-3 K1-1~K2-10

SHARP CORPORATION

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)

1.

Unplug the plug from the AC outlet.

2.

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

3.

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].

4.

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

HOTEL MODE FUNCTION

The following can be set by the Hotel mode function.

Setting item

Hotel mode Power on fixed Maximum volume Volume fixed Volume fix level RC button Panel button Menu button On Screen Display

Input mode start Input mode fixed Reset

Note 1) Note 2)

When setting it to “Fixed", the Sleep timer setting is turned off. When setting it to “Fixed", the VOL+/- key operation of a main/ remote control and the MUTE key operation of a

remote control become invalid. Note 3) Note 4) Note 5) Note 6)

When setting it to “Fixed", the remote control operation and the service mode function in Hotel mode are effective.

When setting it to “Fixed", the service mode function in Hotel mode are effective.

The Sleep timer setting is turned off when setting it to "No", and the audio change with AUDIO key is invalid.

The Input mode fixed setting becomes effective when the Input mode start setting except for " Normal" setting.

FUNCTION

ON/OFF setting for Hotel mode function. Effective/invalid setting of POWER button on the set and remote cotrol. (*Note 1) Setting of the maximum volume value (1~50). Effective/invalid setting of volume fix level function. (*Note 2) Setting of output volume value. Effective/invalid setting of remote control key operation. (*Note 3) Effective/invalid setting of main key operation. (*Note 4) Effective/invalid setting of menu key operation of set and remote cotrol. (*Note 4) Display/non-display setting of analog menu, CALL, CH, audio, backlight, and volume level. (*Note 5) Setting of input source at power supply On. During the power on, effective/invalid setting of tuning the channel and input change operation. (*Note 6) Various settings of the Hotel mode function return initial State.

To set the Hotel mode, please follow the steps below.

1.

In power off mode, press and hold the ‘VOLUME +’ button on the front panel.

2.

Simultaneously press and hold the ‘ ’ button on the front panel.

3.

Hold both keys, press the POWER button on the front panel.

4.

The password screen is displayed.

5.

Press it in order of ‘0’, ‘2’ and ‘7’ key of a remote control unit. Then press the ENTER button.

6.

The Hotel mode setting menu will appear.

7.

Using the LEFT/RIGHT on the remote control, set the Hotel Lock to on.

8.

Turn off the power. The Hotel Lock has now been set up.

To release the Hotel mode, please follow the steps below.

1.

In power off mode, press and hold the ‘VOLUME+’ button on the front panel.

2.

Simultaneously press and hold the ‘ ’ button on the front panel.

3.

Hold both keys, press the POWER button on the front panel.

4.

The password screen is displayed.

5.

Press it in order of ‘0’, ‘2’ and ‘7’ key of a remote control unit. Then press the ENTER button.

6.

The Hotel mode setting menu will appear.

7.

Using the LEFT/RIGHT on the remote control, set the Hotel Lock to off.

8.

Turn off the power. The Hotel Lock has now been cleared.

When the ‘Power on fixed‘ is set to ‘fixed’, press and hold the

NOTE:

‘VOLUME +’ button and ‘ ’ button on the front panel simultaneously. Hold both keys, press the POWER button on the front panel, the power is turned off. Then follow steps 1~8.

Hotel Mode Password

Hotel Mode Hotel mode

Power on fixed Maximum volume Volume fixed Volume fixe level RC button Panel button

Hotel Mode

Menu button On Screen Display Input mode start Input mode fixed Reset

---

Off Variable 50 Variable 22 Respond Respond

Respond Yes 1 Variable

A1-2

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.

A1-3

GENERAL SPECIFICATIONS

0oC

60oC

G-1 TV LCD LCD Size / Visual Size 19.7 inch / 500.3mmV

G-2 Tuning Broadcasting System Analog CCIR, French System B/G D/K I/I SECAM L/L'

G-3 Power Power Source AC 220~240V AC 50/60Hz

G-4 Regulation Safety CE(EN60065:2002), SEMKO

G-5 Temperature Operation

G-6 Operating Humidity 35%RH ~ 75% RH G-7 OSD Language English, Spanish, German, French, Italian,

G-8 Clock and Sleep Timer Max Time 120 Min

System LCD Type Color TFT LCD

Color System PAL, SECAM Speaker 2 Speaker

Sound Output MAX 2W + 2W

AV Input Receivable NTSC3.58 Yes

System Digital -

Tuner and System 1Tuner Receive CH Destination IR. + UK + CCIR Hyper + France CATV

Intermediate Frequency PAL BG / PAL II / PAL DK, SECAM L / SECAM L' (VL) Analog Picture(FP) 38.9 / 38.9 / 38.9 / 33.9 MHz

Digital ATS Area Setting Auto Tuning Method Preset CH Analog 99

Stereo/Dual TV Sound Nicam/A2 Dual Tuner Sound Muting Yes

Power Consumption at AC 74W at AC 230V 50Hz

Protector Power Fuse Yes

Timer Step 30 Min

On/Off Timer Program(On Timer / Off Timer) No Wake Up Timer No EPG Timer Digital tuner only No Timer Back-up (at Power Off Mode) more than -- Min Sec

Number of Pixels 640(H) x 480(V)

View Range Left/Right 85/85 degree

Position Front Size 1.2 x 2.8 inch Impedance 8 ohm

10%(Typical) ---

NTSC4.43 Yes PAL60Hz Yes

CH Coverage

Sound(FS) 33.4 / 32.9 / 32.4 / 40.4 MHz FP-FS 5.5 / 6.0 / 6.5 / 6.5 MHz

Digital -

DC ---

Stand by (at AC) 1W Per Year --- kWh/Year

Safety Circuit Yes IC Protector (Micro Fuse) Yes

Radiation CE X-Radiation ---

Storage

Up/Down 85/85 degree

IreE2~E4, X~Z+2, S1~S10, E5~E12, S11~S41, E21~E69

Germany ALL Band (Not CCIR CH Plan)

at DC ---

~ +4

-2

~ +

Swedish, Dutch, Russian, Portuguese, Turkish, Greek, Finnish, Polish

A2-1

GENERAL SPECIFICATIONS

G-9 Remote Unit RC-NB

Control Glow in Dark Remocon No

Remocon Format SHARP Format SHARP Custom Code 10000 / 10001 / 01111 Power Source Voltage(D.C) 3V

UM size x pcs UM-3 x 2 pcs Total Keys 40 Keys Standby/On Yes

BACKLIGHT Yes

Mute Yes

1 Yes

2 Yes

3 Yes

4 Yes

5 Yes

6 Yes

7 Yes

8 Yes

9 Yes

0 Yes

Flashback Yes

Input select Yes

Volume up Yes

Volume down Yes

Channel up Yes

Channel down Yes

WIDE MODE Yes

Sound Mode Yes

Display information Yes

SLEEP Yes

Teletext Yes

MENU Yes

UP Yes

LEFT Yes

OK / Channel list Yes

RIGHT Yes

DOWN Yes

END Yes

TOP/BOTTOM/FULL Yes

REVEAL Yes

HOLD Yes

SUBTITLE Yes

SUBPAGE Yes

RED Yes

GREEN Yes

YELLOW Yes

BLUE Yes

A2-2

GENERAL SPECIFICATIONS

G-10 Features Auto Power Off (Auto Shut Off) Yes

BBE No Auto Search Yes Sort (CH Allocation) Yes Rotate No Clock (Digital only) No Just Clock Function No Game Position No CH Label Yes T'Text Yes

Subtitle Yes Top Over View (Analog teletext only) No Picture size Yes Position (Picture Scroll) No Surround Yes Backlight Yes Power On Memory Yes Auto Set Up (Fast installation) Auto tuning (Analog tuner) Yes

Picture Setting (TV) Brightness , Contrast , Color Yes

Picture Setting (PC) Brightness , Contrast Yes

Sound Setting Tone Control (Bass/Treble/Balance) Yes

Lock Hotel Lock Yes

PC Monitor Input Yes

Variable Audio Out No Freeze frame No Choke Coil No Rec Screen Status No Digital Text (VBI teletext) No MHEG-5 No MHP No EPG (BBC type 8Days Digital tuner only) No OAD (Over Air Download) (UK only) No Common Interface (Digital tuner only) No LCN Renumber No Country select (Digital Only) No Ch sorting based on Ch List (Digital/Germany only) No Ch Allocation (Digital) No Favorite Ch (Digital) No Rename Service/Carrier (Digital) No

Text type Fastext (FLOF) / Toptext

Text Language

CH sort Yes

ATS Yes

Auto clock (Analog tuner) No

Plug in start (Analog tuner) Yes

Tint Yes

Sharpness Yes

Black Stretch Yes

Backlight Yes

Picture Preference (AV Mode) Yes

Color Temperature Yes

DNR Yes

Color Temperature Yes

Sound via No

Auto Vol Yes

Clear Voice Yes

Sound wide Yes

Child Lock Yes

VGA (640x480) Yes (60Hz)

VGA (720x400) No

WVGA (848x480) No

SVGA (800x600) Yes (60Hz)

XGA (1024x768) Yes (60Hz)

WXGA (1280x768) No

WXGA (1280x720) No

WXGA (1360x768) No

SXGA (1280x1024) No

English, French, Swedish, Hungarian, Turkish, German, Portuguese, Spanish, Italian, Greek, Slovakian, Russian, Polish, Czech, Rumanian, Estonian, Lettish, Lithuanian, Ukrainian, Croatian, Slovenian, Latvian

A2-3

GENERAL SPECIFICATIONS

G-11 Accessories Owner's Manual Language English, German, French, Italian, Dutch, Spanish

w/Guarantee Card No Remote Control Unit Yes Rod Antenna

Poles -

Terminal Loop Antenna (W/ Antenna Change Plug)

Terminal U/V Mixer No DC Car Cord (Center+) Guarantee Card No Warning Sheet No Circuit Diagram No Antenna Change Plug No Service Facility List No Important Safeguard No Dew/AHC Caution Sheet Quick Set-up Sheet No Battery Yes

UM size x pcs UM-3 x 2 pcs

OEM Brand No AC Adapter AC Cord (for AC Adapter) AC Cord Yes AV Cord (2Pin-1Pin) No Registration Card No Information Sheet(WEEE) No 300 ohm to 75 ohm Antenna Adapter No Cable Clamp (x1) Yes Information Sheet(Eco Sheet) Yes

Greek, Portuguese, Swedish, Finnish, Danish Norwegian, Polish, Hungarian, Czech, Slovak, Ukrainian

A2-4

GENERAL SPECIFICATIONS

3 Edges / 5 Surfaces

G-12 Interface Switch Side Sub Power (Tact) Yes

Indicator Power No

Terminals Rear Video Output No

Bottom VHF/UHF Antenna Input

Side CI Card slot No

Front Other Terminal No

G-13 Set Size Approx. W x D x H (mm) 483 x 225 x 435

G-14 Weight Net Approx. 7.4kg

G-15 Carton Master Carton No

Gift Box Material Double/Brown

Drop Test

Container Stuffing 556 w/Pallet w/Wrapping No

G-16 Material Cabinet Cabinet Front PC+ABS 94V-0 Non-Halogen

PCB Non-Halogen No

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

WEEE Yes

System Select No

Main Power SW No

Sub Power (Push) No

Channel Up/Menu Up Yes

Channel Down/Menu Down Yes

Volume Up/Menu > Yes

Volume Down/Menu < Yes

Input Select Yes

Menu Yes

Stand-by No

Power / Stand-By Yes (Green / Red)

On Timer No

OPC No

Color Stream 2 No

Diversity No

Ext Speaker No

DC Jack 12V (Center +) No

AC Inlet

Audio Output (L, R) RCA x2 (Fix)

Other Terminal RS-232C x1

Euro Scart (21Pin) EXT1 Yes (CVBS In, RGB In, Tuner Out)

Euro Scart (21Pin) EXT2 Yes (CVBS In, Y/C In, Video Out)

PC Monitor Input (D-Sub) Yes

Audio Input (Mini Pin) Yes

Audio Input No

Video Input EXT3 RCA x1

Audio Input EXT3 (L/Mono, R) RCA x2 (L/MONO,R White,Red)

S Video Input EXT3 S-Jack x1

Other Terminal Headphone x1

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

Gross Approx. 10.4kg

Content ----

Material --

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

Description of Origin No

Dimensions W x D x H(mm) 588 x 313 x 542

Description of Origin Yes (Made in Japan)

Height (cm) 48

Cabinet Rear PC+ABS 94V-0 Non-Halogen

Eyelet Yes

Pb-free Phase3 (Phase3A)

Measures for Whisker Yes

DIN x1 Yes

483 x 96 x 399.5

Natural Dropping At 1 Corner /

Yes

A2-5

DISASSEMBLY INSTRUCTIONS

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

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

1.

Unlock the 2 supports 1.

2.

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

3.

Remove the 3 screws 2.

4.

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

5.

Remove the 5 screws 3.

6.

Remove the Frame Stand in the direction of arrow (C).

7.

Remove the 4 screws 4.

8.

Remove the Angle Stand in the direction of arrow (D).

4

Cover Back

1

(A)

1

2

(B)

Stand

(C)

3

Angle Stand

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

1.

Remove the 9 screws 1.

2.

Remove the 4 screws 2.

3.

Remove the Back Cabinet in the direction of arrow.

1

2

1

Back Cabinet

2

1

3

(D)

Frame Stand

Fig. 1-1

1

2

1-3: OPERATION PCB (Refer to Fig. 1-3)

1.

Disconnect the following connectors: (CP301 and CP4201).

2.

Remove the 2 screws 1.

3.

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

4.

Remove the 4 screws 2.

5.

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

2

1

4

3

Operation PCB

1

(B)

Plate Button Ass'y

(A)

Fig. 1-3

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

1.

Disconnect the following connectors: (CP302, CP3400, CP3401, CP4301 and CP7201).

2.

Remove the 7 screws 1.

3.

Remove the Main PCB in the direction of arrow (A).

4.

Remove the 2 screws 2.

5.

Remove the 3 screws 3.

6.

Remove the Plate Jack in the direction of arrow (B).

7.

Remove the Shield Jack in the direction of arrow (C).

2

3

1

(C)

1

Main PCB

(B)

1

Shield Jack

1

Plate Jack

Fig. 1-2

(A)

Fig. 1-4

B1-1

DISASSEMBLY INSTRUCTIONS

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

1.

Disconnect the following connectors: (CP6700, CP6701, CP6702, CP6703 and CP6705).

2.

Remove the 7 screws 1.

3.

Remove the Power PCB in the direction of arrow (A).

4.

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

1

Power PCB

(A)

Holder PCB

(B)

1-6: LCD COVER/LCD PANEL (Refer to Fig. 1-6)

1.

Remove the 2 screws 1.

2.

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

3.

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

4.

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

1

Angle Frame

Fig. 1-5

LCD Cover

Front Cabinet

(A)

(B)

LCD Panel

(C)

Fig. 1-6

B1-2

DISASSEMBLY INSTRUCTIONS

2.

REMOVAL AND INSTALLATION OF FLAT PACKAGE IC

REMOVAL

Put Masking Tape (cotton tape) around the Flat Package

1.

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 a 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

2.

IC

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

NOTE

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

Blower type IC desoldering machine

Fig. 2-1

Tweezers

IC

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

IC

IC pattern

Fig. 2-4

Fig. 2-2

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

2.

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

IC

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, be always sure to replace the IC in this case.

Soldering IronSolder

IC

Absorb the solder left on the lead using the Braided

3.

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

IC

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

Set Key Operations

Remocon

Key

Standard

Time

Initialization of factory TV data.

TV mode

VOL. DOWN

(Minimum)

1 2 sec.

NOTE:

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

TV mode

VOL. DOWN

(Minimum)

2

2 sec.

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

POWER ON total hours are displayed on the screen. Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS"

TV mode

VOL. DOWN

(Minimum)

6 2 sec.

(CONFIRMATION OF HOURS USED). Can be checked of the INITIAL DATA of MEMORY IC.

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).

ALL mode

VOL. DOWN

(Minimum)

9 2 sec.

CONFIRMATION OF POWER ON TOTAL HOURS

POWER ON total hours 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".

1.

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

2.

Set the VOLUME to minimum.

3.

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

4.

After the confirmation of POWER ON total hours, turn off the power.

ADDRESS DATA

OEC7162A-083 INIT 0000 F8 LCD ON 0000

MICON Version

Initial setting content of MEMORY IC. 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)

C-1

WHEN REPLACING EEPROM (MEMORY) IC

CONFIRMATION OF CHECK SUM, MICON VERSION AND DIGITAL TV MICON FIRMWARE

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

NOTE:

1.

2.

3.

4.

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 (2) on the remote control for more than 2 seconds. After the confirmation of MICON VERSION and Digital TV MICON Firmware, turn off the power. ADDRESS and DATA should appear as FIG 1.

*1 DVP1 is different according to each set.

Version Hardware version

Software version

2.0

ADDD0400-A [PRE-PRODUCTION]

Firmware Version

Initial setting data check sum.

AD CONVERTER data check sum.

OEC7162A-083 INIT: 6A10 ADC: 0000

ROM: 7E5F DVP: 1F84 *1

MICON Version Rom correction data check sum. SCALER data check sum.

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

OEC7162A-083 INIT 0000 F8 LCD ON 0000

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.

9.

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

JG199JG198 Serial Communication Change JIG

Ref. No.

JG198

JG199

JG176

Confirm that the AC cord is plugged out.

1. Using the Serial Communication Change JIG (JG198), connect the set to personal computer. (Refer to Fig. 1)

2.

NOTE: It is possible to write only with the personal computer of WINDOWS.

Part No.

APJG201000

APJG200000

Parts Name

Serial Communication Change JIG

Flash UP-Date Soft Disc

DTV ROM DISC

Flash UP-Date Soft Disc

Connect the set to personal computer

Up-Date of the Firmware

Up-Date of the FirmwareAPJG176109

JG176

DTV ROM DISC

Remarks

Fig. 1

3.

Using the Flash UP-Date Soft Disc (JG199) and DTV ROM DISC (JG176), please Re-write the DIGITAL SOFT FIRMWARE. The operating manual for Re-writing is included in Flash UP-Date Soft Disc (JG199).

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.

•

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).

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.

NO.

FUNCTION

NO.

H POSI OSD

01

V POSI OSD

02

R DRIVE (H)

03

R CUTOFF (H)

04

G DRIVE (H)

05

G CUTOFF (H)

06

B DRIVE (H)

07

B CUTOFF (H)

08

R DRIVE (M)

09

R CUTOFF (M)

10

G DRIVE (M)

11

G CUTOFF (M)

12

B DRIVE (M)

13

B CUTOFF (M)

14

R DRIVE (L)

15

R CUTOFF (L)

16

G DRIVE (L)

17

G CUTOFF (L)

18

B DRIVE (L)

19

B CUTOFF (L)

20

H POSI

21

H POSI MAX

22

FUNCTION

23

H POSI MIN

24

V POSI

25

V POSI MAX

26

V POSI MIN

27

BAK LIGHT CENT

28

BAK LIGHT MAX

29

BAK LIGHT MAX

30

BRIGHT CENTER

31

BRIGHT MAX

32

BRIGHT MIN

33

TINT CENTER

34

CONTRAST CENTER

35

CONTRAST MAX

36

CONTRAST MIN

37

CONTRAST 50

38

COLOR CENTER

39

COLOR MAX

40

COLOR MIN

41

TEXT H POSI

42

TEXT V POSI

43

DAC Vcom

2-1: FLICKER

1.

Activate the adjustment mode display of Fig. 2-1 and

2.

press the channel button (43) on the remote control to select “DAC Vcom”.

3.

Check if the screen is flashing.

4.

If screen is flashing, press the" i+" button on the remote control and using the LEFT/RIGHT button on the remote control to adjust the screen.

Fig. 2-2

TV

01 H POSI OSD

9

Fig. 2-1

3.4.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.

2-2: WHITE BALANCE

1.

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

2.

Receive the gray scale pattern from the Pattern Generator.

3.

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

4.

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

5.

Activate the adjustment mode display of Fig. 2-1 and press the channel button (03) on the remote control to select “R DRIVE (N)”.

6.

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)”.

7.

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.

8.

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

D-1

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

j

)

ELECTRICAL ADJUSTMENTS

Please check if the fixed values of each of the ad

NO. FUNCTION

1 H POSI OSD 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 2 V POSI OSD 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 3 R DRIVE (H) 4 R CUTOFF (H) 5 G DRIVE (H) 6 G CUTOFF (H) 7 B DRIVE (H) 8 B CUTOFF (H) 9 R DRIVE (M) 10 R CUTOFF (M) 11 G DRIVE (M) 12 G CUTOFF (M) 13 B DRIVE (M) 14 B CUTOFF (M) 15 R DRIVE (L) 16 R CUTOFF (L) 17 G DRIVE (L) 18 G CUTOFF (L) 19 B DRIVE (L) 20 B CUTOFF (L) 21 H POSI 22 H POSI MAX 23 H POSI MIN 24 V POSI 25 V POSI MAX 26 V POSI MIN 27 BAK LIGHT CENTER 28 BAK LIGHT MAX 29 BAK LIGHT MIN 30 BRIGHT CENTER 31 BRIGHT MAX 32 BRIGHT MIN 33 TINT CENTER 34 CONTRAST CENTER 35 CONTRAST MAX 36 CONTRAST MIN 37 CONTRAST 50 38 COLOR CENTTER 39 COLOR MAX 40 COLOR MIN 41 TEXT H POSI 42 TEXT V POSI 43 DAC Vcom

PAL50Hz PAL60Hz

******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * ********** ******* * **** **** * * **********

626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626 626

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 117 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230 230

48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40

-100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 -100 0000000 0 000 0 0 000 0 0 0000000000

******* * **** **** * * ********** ******* * **** **** * * **********

14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14

******* * **** **** * * **********

36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 36 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63

0000000 0 000 0 0 000 0 0 0000000000 0000000 0 000 0 0 000 0 0 0000000000 0000000 0 000 0 0 000 0 0 0000000000

******* * **** **** * * **********

ustment items are set correctly referring below. (A-TU/EXT1,EXT2(CVBS) /EXT3(CVBS) /EXT2(S(Y/C)) /EXT3(S(Y/C)) /EXT1(RGB

A-TU

576i

SECAM

PAL50Hz PAL60Hz

CVBS CVBS S(Y/C) S(Y/C)

SECAM

NTSC3.58 NTSC4.43 PAL50Hz PAL60Hz

SECAM

NTSC3.58 NTSC4.43 PAL50Hz PAL60Hz SECAM NTSC3.58 NTSC4.43 PAL50Hz PAL60Hz

Step No.

EXT3EXT2EXT3EXT1,EXT2

SECAM

NTSC3.58 NTSC4.43 PAL50Hz PAL60Hz

EXT1

576i 480i576i 480i 576i 480i 576i 480i 576i 480i

RGB

SECAM

NTSC3.58 NTSC4.43

NOTE: For the steFor the step no. with * mark, please adjust it according to the situation of the set.

D-2 D-3

Sharp LC-20S5E-BK Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual