Sharp LC-20SD4E 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-20SD4E

Page A1-1 A1-1 A1-1 A1-2 A1-3 A2-1~A2-4 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-40 I-1~I-3 J-1~J-3 K1-1~K2-10

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

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.

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

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

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

The password screen is displayed.

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

The Hotel mode setting menu will appear.

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

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

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

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

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

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

The password screen is displayed.

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

The Hotel mode setting menu will appear.

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

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

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

System LCD Type Color TFT LCD

Color System PAL, SECAM Speaker 2 Speaker

Sound Output MAX 2.1W + 2.1W

NTSC3.58+4.43 /PAL60Hz Yes

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

System Tuner and System 2Tuner (Analog:1, Digital:1)

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 Auto Tuning Method Preset CH Analog 199

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

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

Power Consumption at AC 89W at AC 230V 50Hz

Protector Power Fuse Yes

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

G-5 Temperature Operation 0oC ~ +40oC

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

Timer Step

On/Off Timer Program(On Timer / Off Timer) No Wake Up Timer No EPG Timer Digital tuner only Yes 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 1.57 x 4.33 inch Impedance 8 ohm

10%(Typical) ---

Digital DVB-T (OFDM 2k/8k)

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 Carrier 200 / Service 1000

DC ---

Stand by (at AC) 1W (No EPG Timer) Per Year --- kWh/Year

Safety Circuit Yes IC Protector (Micro Fuse) Yes

Radiation CE X-Radiation ---

Storage -20oC ~ +60oC

Up/Down 85/85 degree

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

36.167MHz ALL Band (Not CCIR CH Plan)

at DC ---

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

30 Min

A2-1

GENERAL SPECIFICATIONS

G-9 Remote Unit RC-MU

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 44 Keys POWER Yes

1 Yes

2 Yes

3 Yes

4 Yes

5 Yes

6 Yes

7 Yes

8 Yes

9 Yes

0 Yes

Up Yes

Down Yes

Left Yes

Right Yes

CH+ Yes

CH- Yes

VOL+ Yes

VOL- Yes

MUTE Yes

AUDIO1/2 Yes

TV/Radio Yes

DTV/TV Yes

Screen size Yes

Information Yes

Sleep Yes

Guide Yes

Enlage Yes

Exit Yes

TEXT / TV Yes

Input select Yes

Menu Yes

DTV Menu Yes

Enter / Top Over View Yes

Sub page Yes

Flashback (Quick View) Yes

Reveal / Skip Yes

Subtitle Yes

Hold / Status Yes

Back Light Yes

Red Yes

Green Yes

Yellow Yes

Cyan Yes

A2-2

GENERAL SPECIFICATIONS

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

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

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

Subtitle Yes Picture size Yes Position (Picture Scroll) Surround Yes Backlight Yes Stable Sound No Power On Memory Yes Auto Set Up (Fast installation) Auto tuning (Analog tuner) Yes

Picture Setting Brightness , Contrast , Color Yes

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

Digital Text (VBI teletext) Yes MHEG-5 Yes MHP No EPG (BBC type 8Days Digital tuner only) Yes OAD (Over Air Download) (UK only) No Common Interface (Digital tuner only) Yes LCN Renumber Yes Rec Screen Status Yes Top Over View (Analog teletext only) Yes Hotel Lock Yes Choke Coil Yes PC Monitor Input No Freeze frame No

Remote Control Unit Yes Rod Antenna

Loop Antenna (W/ Antenna Change Plug)

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 Yes AV Cord (2Pin-1Pin) Registration Card Information Sheet(WEEE) 300 ohm to 75 ohm Antenna Adapte Cable Clamps(x2) Yes

ormation Sheet(Eco Sheet) Yes

Text type Fastext (FLOF) / Toptext

Text Language

CH sort No

ATS No Auto clock (Analog tuner) No Plug in start (Analog tuner) Yes

Tint Yes Sharpness Yes

Sound via Yes Sound wide Yes

w/Guarantee Card w/WEEE information Yes

Poles Terminal -

Terminal -

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

[West] English, French, Swedish, Hungarian, Finnish, Turkish, German, Dutch, Portuguese, Spanish, Italian, Greek, slovak [East] Russian, Polish, Bulgarian, Czech, Rumanian, Estonian, Lettish, Lithuanian, Ukranian

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

No No

No No No No No No

No No No No

A2-3

GENERAL SPECIFICATIONS

G-12 Interface Switch Sub Power (Tact) No

Indicator Power No

Terminals Rear Video Input EXT2 RCA x1

Side CI Card slot Yes

Front Other Terminal Headphone x1

G-13 Set Size Approx. W x D x H (mm) 483 x 224 x 476

G-14 Weight Net Approx. 7.4kg (16.3 lbs)

G-15 Carton Master Carton

Gift Box Material Double/Brown

Drop Test

Container Stuffing 556

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

PCB Non-Halogen

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

WEEE Yes

System Select No Main Power SW No Sub Power (Push) Yes 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 / EPG Timer On Timer No OPC No

Audio Input EXT2 (L/Mono, R) RCA x2 S Video Input EXT2 S-Jack x1 Video Output No Audio Output (L, R) RCA x2 Color Stream 2 No Other Terminal No Euro Scart (21Pin) EXT1 PC Monitor Input (D-Sub) No Audio Input (L/Mono, R) No Diversity No Ext Speaker No DC Jack 12V (Center +) No VHF/UHF Antenna Input AC Inlet

Audio Input No

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

Gross Approx. 10.4kg (22.9 lbs)

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

Dimensions W x D x H(mm) 588 x 313x 583 Description of Origin Yes (Made in Japan)

Height (cm) 62 (SHARP SPEC:48)

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

Eyelet Yes

Pb-free Phase3 (Phase3A)

Yes (Green / Red / Orange)

Yes

DIN x1 Yes

483 x 106.5 x 433

Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces

No Sets /--

Sets/40' container

A2-4

DISASSEMBLY INSTRUCTIONS

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

1-1:

STAND COVER/STAND ASS'Y/DAMMY CARD (Refer to Fig. 1-1)

Remove the 1 screw 1.

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

Remove the 4 screws 2.

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

Remove the Dammy Card in the direction of arrow (C).

Stand Cover

(A)

(B)

Stand Ass'y

(C)

Dammy Card

Fig. 1-1

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

1.2.Remove the 9 screws 1.

Remove the Back Cabinet in the direction of arrow.

1-3: ANGEL EARTH-1/DIGITAL PCB (Refer to Fig. 1-3)

Disconnect the following connectors: (CD003 and CP505).

Remove the 7 screws 1.

Remove the Angel Earth-1 and Digital PCB in the direction of arrow.

Digital PCB

Angel Earth-1

Fig. 1-3

1-4: PCB ASS'Y (Refer to Fig. 1-4)

Disconnect the following connector: (CP202).

Remove the 3 screws 1.

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

Disconnect the following connectors: (CP3201, CP801 and CP802).

Remove the 4 screws 2.

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

Disconnect the following connectors: (CP503, CP302, CP303, CP6700, CP6701, CP6702, CP6703 and CP6704).

Remove the 7 screw 3.

Remove the 9 screws 4.

10.

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

11.

Disconnect the following connectors: (CP503 and CP2201).

12.

Remove the 2 screw 5.

13.

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

14.

Remove the Holder PCB Tuner.

15.

Remove the Tuner PCB in the direction of arrow (E).

Back Cabinet

Fig. 1-2

B1-1

DISASSEMBLY INSTRUCTIONS

Tuner PCB

Back Light PCB

(C)

Sacler PCB

Operation PCB

1-5:

HOLDER PCB/BACK SHIELD/LCD PANEL

(B)

(A)

(E)

Angle Earth-2

AV PCB

(D)

Holder Ac Inlet

(Refer to Fig. 1-5)

Remove the 3 screws 1.

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

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

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

Fig. 1-4

(C)

(A)

(B)

Holder PCB

Back Shield

LCD Panel

Front Cabinel

Fig. 1-5

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

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 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".

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.

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:

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 ADD0400-9-1 [PRE-PRODUCTION]

Firmware Version

Initial setting data check sum.

AD CONVERTER data check sum.

OEC7162A-083 INIT: 680A ADC: 0000

ROM: 0000 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.

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)

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

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.

•

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

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)

H POSI 50Hz

H POSI 60Hz

FUNCTION

V POSI 50Hz

V POSI 60Hz

BAK LIGHT MEDIUM

BAK LIGHT BRIGHT

BAK LIGHT DARK

BRIGHT CENT

BRIGHT MAX

BRIGHT MIN

TINT

CONTRAST CENTER

CONTRAST MAX

CONTRAST MIN

COLOR CENT

COLOR MAX

COLOR MIN

H POSI TEXT

V POSI TEXT

CONTRAST 35

DAC IC Vcom

H POSI TEXT (MIX)

V POSI TEXT (MIX)

2-1: FLICKER

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

press the channel button (44) on the remote control to select “DAC IC Vcom”.

Check if the screen is flashing.

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

01 H POSI OSD

346

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

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. 2-1 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

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

)

ELECTRICAL ADJUSTMENTS

Please check if the fixed values of each of the ad

PAL50Hz PAL60Hz

NO. FUNCTION

1H POSI OSD 000000 0 0 000 0 0 000 0 0 00000 2 V POSI OSD 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 3 R DRIVE (N) 4 R CUTOFF (N) 5 G DRIVE (N) 6 G CUTOFF (N) 7 B DRIVE (N) 8 B CUTOFF (N) 21 H POSI 50Hz 22 H POSI 60Hz 22 H POSI (SIDE BAR) 24 V POSI 60Hz 25 BAK LIGHT MEDIUM 26 BAK LIGHT BRIGHT 27 BAK LIGHT DARK 28 BRIGHT CENT 29 BRIGHT MAX 30 BRIGHT MIN 31 TINT 35 CONTRAST CENTER(N) 36 CONTRAST MAX(N) 37 CONTRAST MIN(N) 38 COLOR CENT 39 COLOR MAX 40 COLOR MIN 41 H POSI TEXT 42 V POSI TEXT 43 CONTRAST 35 44 DAC IC Vcom

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

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --323 323 323 323 323 323 323 323 316 316 316 316 316 323 323 323 323 323 323 323 323 323 323 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300

34 34 34 34 34 34 34 34 31 31 31 31 31 34 34 34 34 34 34 34 34 34 34

25 25 25 25 25 25 25 25 21 21 21 21 21 25 25 25 25 25 25 25 25 25 25 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217 217

43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 43 133 134 133 133 133 133 133 133 133 133 133 133 133 134 134 134 134 134 134 134 134 134 134 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170 170

55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 116 116 116 116 116 116 109 109 116 116 116 120 120 116 116 116 109 109 116 116 116 109 109

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

60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60 60

78 80 48 67 67 69 75 75 122 122 122 150 150 67 67 69 75 75 66 66 75 80 80 127 127 127 127 127 127 127 127 200 200 200 200 200 127 127 127 127 127 127 127 127 127 127

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214

69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69

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

449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449 449

ustment items are set correctly referring below. (TV/AV/D-Terminal

CVBS RGBTV

576i 480i 576i 480i 576i 480i 576i 480i

SECAM

PAL50Hz PAL60Hz

SECAM

NTSC3.58 NTSC4.43 PAL50Hz PAL60Hz

AV1

SECAM

AV2

CVBS S(Y/C)

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

Step No.

SECAM

NTSC3.58 NTSC4.43

D-2 D-3

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-4

POWER DOES NOT TURN ON

TROUBLESHOOTING GUIDE

IS F501 BROKEN ?

IS THERE VOLTAGE AT PIN 4 OF IC501

18.9V ?

YES

IS THERE VOLTAGE AT PIN 2 OF IC504 AT5V ?

YES

CHANGE AV PCB.

YES

CHANGE F501.

CHECK IC501 AND PERIPHERAL CIRCUIT.

CHECK IC504 AND PERIPHERAL CIRCUIT. OR CHANGE IC504.

E-1

THE PICTURE DOES NOT APPEAR (1).

TROUBLESHOOTING GUIDE

IS CD7201 CONNECTED ?

YES

IS THERE SIGNAL AT CP7201 ?

YES

IS THERE SIGNAL AT IC7201 ?

YES

CHECK IC801. OR CHANGE SCALER PCB.

CONNECT CD7201.

CHANGE CP7201.

CHANGE IC7201.

E-2

THE PICTURE DOES NOT APPEAR (2).

TROUBLESHOOTING GUIDE

IS THERE SIGNAL AT IC4201 ?

YES

IS CD4204 CONNECTED AND IS THERE SIGNAL ?

YES

CHECK IC801 AND PERIPHERAL CIRCUIT.

CHECK IC4201 AND PERIPHERAL CIRCUIT.

CONNECT CD4204. CHECK IC4201 AND PERIPHERAL CIRCUIT.

E-3

THE PICTURE DOES NOT APPEAR. (DIGITAL)

TROUBLESHOOTING GUIDE

DOES AN ERROR MESSAGE DISPLAY IT?

YES

IS THERE SIGNAL AT PINS 2 AND 3 OF CP2402 ?

CHECK SUB POWER PCB

YES

CHANGE DIGITAL TUNER MODULE.

E-4

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