Sharp LC-20AD5E-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) ..................................................................................

•

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

•

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

•

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

•

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

•

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

•

SERVICING FIXTURES AND TOOLS.................................................................................

•

INSTALL FOR WRITING TOOLS ........................................................................................

•

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

•

UPDATE FOR VCTP SOFTWARE ......................................................................................

•

UPDATE FOR EEPROM DATA...........................................................................................

•

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

•

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

•

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

•

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

•

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

•

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

•

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

•

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

•

LC-20AD5E-BK

Page A1-1 A1-1 A1-1 A1-2 A1-3 A1-3 A2-1~A2-6 B1-1~B2-2 C-1 C-2 C-3 C-3 C-4~C-7 C-8~C-11 C-12, C-13 D-1~D-7 E-1~E-7 F-1~F-14 G-1~G-8 H-1~H-40 I-1, I-2 J-1, J-2 K1-1~K2-9

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)

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 will turn 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)

When setting it to “No Respond", the remote control key operation and service mode function in Hotel mode are

effective. Note 4) Note 5) Note 6) Note 7)

When setting it to “No Respond", the service mode function in Hotel mode are effective.

The sleep timer setting will turn off when setting it to "No", and the audio change using the AUDIO key is invalid.

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

Except the Hotel mode function return initial State.

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 (0~50). 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, Audio, Program table(CH List) 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. (*Note 7)

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 for 3 seconds, 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 mode to on.

Turn off the power. The Hotel mode 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 for 3 seconds, 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 mode to off.

Turn off the power.

The Hotel mode has now been cleared.

Hotel Mode

Please input password

- - -

0/9: Set OK: Ener END: Exit

Hotel Mode

Adjust Setting Hotel mode Power on fixed Maximum volume Volume fixed Volume fixe level RC button Panel button Menu button On Screen Display Input mode start Input mode fixed Reset

: Select

Off Variable 50 Variable 20 Respond Respond Respond Yes Normal Variable Yes

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 Please use a soldering iron with temperature control and adjust it to 650 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 1100oF/ 600oC).

•

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.

F~104oF(30oC~40oC) higher.

F ± 20oF (350oC ± 10oC).

Recommendations

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

PARENTAL CONTROL - RATING LEVEL

4 DIGIT PASSWORD CANCELLATION

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

Turn on the power.

Set the VOLUME to minimum.

Press both VOL. DOWN button on the set and Channel button (3) on the remote control for more than 2 seconds.

The 4 digit password has naw been cancelled.

NOTE:

No indications on the screen when the Parental Lock is setting. Initializing password is 0000.

A1-3

GENERAL SPECIFICATIONS

B/G, D/K, I/I, L

(SECAM VL)

0oC ~ +40oC

-20oC ~ +60oC

Timer Back-up (at Power Off Mode) more than -- Min Sec

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

System LCD Type Color TFT LCD

Color System PAL / SECAM Speaker 2 Speaker

Sound Output MAX 2W + 2W

NTSC3.58+4.43 /PAL60Hz Yes

G-2 Tuning Broadcasting System Analog

Number of Pixels 1366(H) x 768(V) View Range Left/Right 88/88 degree

Up/Down 88/88 degree

Position Front Size 1.2 x 2.8 inch Impedance 8 ohm

10%(Typical) ---

U.K., I.R., CCIR, FRENCH System

Digital

System Tuner and System 1Tuner (Analog+Digital)

Receive CH Destination UK, I.R., CCIR Hyper+France CATV CH Coverage Analog IreE2~E4, X~Z+2, S1~S10, E5~E12,S11~S41,E21~E69

Digital E5~E12, ItaE~G, F1~F6, Rus6~12, E21~E69

Intermediate Analog

Frequency Picture(FP) 38.9 / 38.9 / 38.9 / 33.9MHz

Sound(FS) FP-FS

Digital Auto Tuning Method Preset CH Analog 99

Digital Carrier 200 / Service 1000 Stereo/Dual TV Sound Nicam/A2 Dual Tuner Sound Muting Yes

G-3 Power Power Source AC 220-240V AC 50Hz

DC --Power Consumption at AC 84 W at AC 230 V 50 Hz

at DC --

Stand by (at AC) w/ EPG Timer 9 W at 230V 50Hz

w/o EPG Timer 1 W at 230V 50Hz

Per Year -- kWh/Year Protector Power Fuse Yes

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

Radiation CE

X-Radiation ---

G-5 Temperature Operation

Storage

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 30 Min

On/Off Timer Program(On Timer / Off Timer) -- Program Wake Up Timer No

DVB-T (OFDM 2k/8k 16QAM/64QAM)

BG / II / DK, L / L'

33.4 / 32.9 / 32.4 / 40.4MHz

5.5 / 6.0 / 6.5 / 6.5MHz

36.167MHz ALL Band (Not C.C.I.R. CH Plan)

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

A2-1

GENERAL SPECIFICATIONS

Cyan Yes

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 43 Keys Keys Power (Stand By) Yes

TV/Radio Yes

DTV/TV Yes

Backlight No

Mute Yes

1 Yes

2 Yes

3 Yes

4 Yes

5 Yes

6 Yes

7 Yes

8 Yes

9 Yes

Flashback (Quick View) Yes

0 Yes

Input Select Yes

Volume Up Yes

Volume Down Yes

CH Up Yes

CH Down Yes

Screen size Yes

Audio 1/2 Yes

Information Yes

Sleep Yes

Guide Yes

Digital Menu Yes

TEXT / TV Yes

Menu Yes

End Yes

TOP/BOTTOM/FULL Yes

UP Yes

DOWN Yes

LEFT Yes

RIGHT Yes

OK / Channel list / Index Yes

Reveal Yes

HOLD/Freeze Yes

Subtitle Yes

Sub Page Yes

Red Yes

Green Yes

Yellow Yes

A2-2

GENERAL SPECIFICATIONS

Reset TV Setting Yes

G-10 Features Power On Memory Yes

Auto Shut Off Yes No Operation Off Yes Just Clock Function No Game Position No DNR Yes

Comb Filter Yes

Auto Set Up (Fast installation) Auto tuning (Analog tuner) Yes

Auto clock (Analog tuner) No

Picture Setting(TV) Picture Preference (AV Mode) Yes

Picture Setting(PC) BRIGHTNESS , CONTRAST Yes

Audio Nicam No

Tuning Auto Tuning Yes

Lock Chaild Lock Yes

Screen Saver

Black Side Panel No CH Label Yes T'Text Yes

Wide Mode (AUTO/4:3/FULL SCREEN/16:9/CINEMA/14:9) Yes HD Zoom No Picture Scroll (Vertical Position) No PFC(Power Factor circuit) Yes Freeze frame Yes (w/o720p, 1080i) HD-Ready Yes Plug and Play Yes

Plug in start Yes

Brightness , Contrast , Color Yes

Tint Yes

Sharpness Yes

Black Stretch Yes

DNR Yes

Color Temperature Yes

Blue Back Yes

Backlight Yes

Film Mode Yes

Color Temperature Yes

HOR POSITION , VER POSITION Yes

PHASE , CLOCK Yes

AUTO ADJUST No

RED , GREEN , BLUE Yes

Backlight Yes

Power Management Yes

XGA Mode Yes

WXGA INPUT No

WVGA INPUT No

Tone Control (Bass/Treble/Balance) Yes

Loudsp. Sound Yes

Auto Vol Yes

Clear Voice Yes

Surround (Sound wide) Yes

BBE No

SRS WOW (SRS 3D/Focus/Tru Bass) No

Variable Audio Out No

Manual Tuning Yes

CH Allocation Yes

Hotel Lock Yes

Inversion No

Full White No

Screen Saver No

Static Image No

Text type Fastext / Toptext

Text Language English , French, Swedish, Hungarian

CH sort Yes

ATS Yes

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

A2-3

GENERAL SPECIFICATIONS

1920×1080i Yes (50/60Hz)

Scart Spec Scart1 AV in Yes

Scart2 AV in Yes

Digital Text (VBI teletext) MHEG-5 MHP EPG (BBC type 8Days Digital tuner only) OAD (Over Air Download) Common Interface (Digital tuner only) Rec Screen Status Ch sorting based on Ch List (Digital/Germany only) Rename Carrier (Digital) Edit Event Timer Software Update via CI Slot Preference Language (Audio/Subtitle/Digital Service)(Digital) Ch Organizer (Fav, Lock, Skip, Go To, Delete, Rename, Move, Move to) Parental Lock (Digital) DVB Subtitle (Digital) PC Monitor Input Yes

HDMI Input Yes

Component Input Yes

AV out Yes (A.Tuner/D.Tuner)

S-Video in Yes

RGB in Yes

AV out Yes (Monitor)

S-Video in Yes

RGB in Yes

Yes Yes

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

VGA (640x480) Yes (60Hz)

VGA (720x400) No

WVGA (848x480) No

SVGA (800x600) Yes (60Hz)

XGA (1024x768) Yes (60Hz)

WXGA (1280x768) Yes (60Hz)

WXGA (1280x720) No

WXGA (1360x768) Yes (60Hz)

SXGA (1280x1024) No

VGA (640×480) Yes (60Hz)

720×480i (4:3) Yes (60Hz)

720×480i (16:9) Yes (60Hz)

720×480p (4:3) Yes (60Hz)

720×480p (16:9) Yes (60Hz)

720×576i (4:3) Yes (50Hz)

720×576i (16:9) Yes (50Hz)

720×576p (4:3) Yes (50Hz)

720×576p (16:9) Yes (50Hz)

1280×720p Yes (50/60Hz)

1920×1080i Yes (50/60Hz)

720×480i (4:3) Yes (60Hz)

720×480i (16:9) Yes (60Hz)

720×480p (4:3) Yes (60Hz)

720×480p (16:9) Yes (60Hz)

720×576i (4:3) Yes (50Hz)

720×576i (16:9) Yes (50Hz)

720×576p (4:3) Yes (50Hz)

720×576p (16:9) Yes (50Hz)

1280×720p Yes (50/60Hz)

A2-4

GENERAL SPECIFICATIONS

On Timer No

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

w/Guarantee Card Remote Control Unit Yes Rod Antenna

Poles -

Terminal Loop Antenna (W/ Antenna Change Plug)

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

UM size x pcs UM-3 x 2 pcs

OEM Brand No AC Adapter AC Cord (for AC Adapter) AC Cord x 2 Yes AV Cord (2Pin-1Pin) AQUOS CARE PLAN Yes HDMI-DVI Cable Registration Card 300 ohm to 75 ohm Antenna Adapter Information Sheet(Protection Sheet) Information Sheet(Eco Sheet) Yes(From '07.AUG O/R) Information Sheet(for G-card and AQUOS CARE PLAN) Yes(Only '07.MAY/JUN oder) Cleaning Cloth Yes Gurantee Card Yes

G-12 Interface Switch Power (Tact) Yes

System Select No

Main Power SW No

Channel Up/Menu Up Yes

Channel Down/Menu Down Yes

Volume Up/Menu > Yes

Volume Down/Menu < Yes

Input Select/Enter Yes

Menu Yes Indicator Power/Stand-by/EPG Timer Yes(GREEN / RED / ORANGE)

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

A2-5

GENERAL SPECIFICATIONS

Mini Pin Jack(φ3.5), STEREO

Sets

/--

Sets/40' container

Yes

Terminals Side Video Input 1

Audio Input 1

S- Input 1 Yes

Video Input 2 No

Audio Input 2 No

S- Input 2 No

Video Output No

Audio Output

Digital Audio Out (Coaxial) No

Other Terminal No

Euro Scart (21Pin) No

Component In

Audio Input (Component In use)

PC Monitor Input (D-Sub) No

Audio Input No

HDMI Input 1 No

Audio Input (HDMI/DVI In use) No

HDMI Input 2 No

Audio Input (HDMI/DVI In use) No

RS-232C No

Sub Woofer Output No

Diversity No

Ext Speaker No

DC Jack 12V(Center +) No

VHF/UHF Antenna Input No

AC Inlet No

Other Terminal Headphone

CI Card Slot Yes(w/DUMMY CARD)

Rear Euro Scart (21Pin) 2Scart

PC Monitor Input (D-Sub)

Audio Input

HDMI Input 1

Audio Input (HDMI/DVI In use) PC Monitor Audio Input Alternative

RS-232C

VHF/UHF Antenna Input

AC Inlet Yes

G-13 Set Size Approx. W x D x H (mm) 522 x 225 x 395.5

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

G-14 Weight Net Approx. 7.3kg (16.5 lbs)

Net w/o Stand,Handle Approx. 6.5kg (14.7 lbs)

Gross Approx. 11.5kg (25.0 lbs)

G-15 Carton Master Carton

Content ----

Material --

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

Description of Origin

Gift Box Yes

Material Double/Brown

Dimensions W x D x H(mm) 622 x 320 x 503

Design As per Buyer's

Description of Origin Yes (Made in Japan)

Drop Test Natural Dropping At 1 Corner / 3 Edges / 5 Surfaces

Height (cm) 48

Container Stuffing 532 w/Pallet No w/Wrapping No

G-16 Material Cabinet Cabinet Front PC+ABS 94V0 NON-HALOGEN

Cabinet Rear PS 94V0 NON-HALOGEN

PCB Non-Halogen

Eyelet Yes

G-17 Environment Environmental standard requirement Green procurement of SHARP

Pb- Free Phase3(PHASE3A)

Measures for Whisker Yes

WEEE

RCA x 1

RCA x 2(L/MONO, R)

RCA x 2(Fixed) (L, R)

Yes RCA x 2(L/MONO, R)

Yes

Yes DIN Type

522 x 101.5 x 359.5

A2-6

DISASSEMBLY INSTRUCTIONS

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

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

Unlock the 2 supports 1.

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

Remove the 3 screws 2.

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

Remove the 5 screws 3.

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

Remove the 4 screws 4.

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

Cover Back

(A)

(B)

Stand

(C)

Angle Stand

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

Remove the 9 screws 1.

Remove the 4 screws 2.

Remove the Back Cabinet in the direction of arrow.

(D)

Frame Stand

Fig. 1-1

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

Disconnect the following connectors: (CP301 and CP4201).

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

Remove the screw 1.

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

Operation PCB

Plate Button Ass'y

(B)

(A)

Fig. 1-3

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

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

Remove the 4 screws 1.

Remove the Power PCB in the direction of arrow.

Back Cabinet

Power PCB

Fig. 1-4

Fig. 1-2

B1-1

DISASSEMBLY INSTRUCTIONS

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

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

Remove the 6 screws 1.

Remove the screw 2.

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

Remove the 3 screws 3.

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

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

Remove the 3 screws 4.

Remove the screw 5.

10.

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

11.

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

Shield Digital

Plate Jack Side

Shield Jack Side

(B)

(C)

(E)

(D)

Shield Jack

Plate Jack

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

Remove the 3 screws 1.

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

Remove the 2 screws 2.

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

Remove the 4 screws 3.

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

Angle Hinge

LCD Cover

(B)

(C)

(A)

Main PCB

Fig. 1-5

Front Cabinet

LCD Panel

(A)

Fig. 1-6

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

POWER ON

Set Key Operations

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

Remocon

Key

1 2 sec.

9 2 sec.

Standard

Time

2 sec.

Initialization of factory TV data. NOTE:

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".

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

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

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

C-1

WHEN REPLACING EEPROM (MEMORY) IC

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

Initial total of MEMORY IC, MICON VERSION, Digital TV MICON Firmware and 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". Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.

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 (2) on the remote control for more than 2 seconds.

3. After the confirmation of MICON VERSION and Digital TV MICON Firmware, turn off the power.

4. ADDRESS and DATA should appear as FIG 1.

NOTE: The each item value might be

different according to each set.

Version

Initial setting data check sum.

AD CONVERTER data check sum.

Main Micon Fimware Version

Sub Micon Fimware Version

Hardware version Software version

INIT: 2ED0 VCT-P: 3451

ANALOG M: DB060-70328A ANALOG S: DB050-70330A

A.0 CB00C74021

LCD ON: 0000

FIG. 1

Firmware Version

END

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)

CONFIRMATION OF INITIAL DATA

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

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

1. Set the VOLUME to minimum.

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

3. ADDRESS and DATA should appear as FIG 2.

ADDRESS DATA

INIT 0000 00 LDC ON 0000 ANALOG M: DB060-70328 ANALOG S: DB050-70330

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

SERVICING FIXTURES AND TOOLS

JG201 Serial Communication

Change JIG

Ref. No.

JG176

JG201

Part No.

APJG176133JG176

APJG212003JG212

APJG201000

JG203 MICON PROGRAM JIG KIT 25-4

Parts Name

EU LCD MICON VER UP ROM DISC

DTV ROM DISC EEP ROM DISC Serial Communication

Change JIG

JG176

JG212 JG204

Up-Date of the VCTP DATA.

Up-Date of the Digital Soft Firmware.APJG176130 Up-Date of the EEPROM DATA.

Connect the set to personal computer.

EU LCD MICON VER UP ROM DISC DTV ROM DISC EEPROM DISC MICON UPDATE TOOL DISC

Remarks

JG203

JG204

APJG203000

APJG204000

MICON PROGRAM JIG KIT 25-4

MICON UPDATE TOOL DISC

INSTALL FOR WRITING TOOLS

1.2.Set the MICON UPDATE TOOL DISC (JG204) to PC.

Install the LPT driver.

NOTE :

It is necessary to install according to the PC.

Windows 95/98 : Setup_LptDrv_v0104_9x.exe Windows 2000/XP : Setup_LptDrvDev_v020201_XP_2000.exe Windows NT : Setup_LptDrv_v0104_NT.exe

Connect the set to personal computer.

There is WRITING TOOLS in Disc.

Re-boot the PC.

Install the “Setup_Visual_I2C_v3-2-3b8h.exe”, “Setup_VI2C_for_VCT_Pro_v0101.exe” and “Winupload 4.4.3.exe”.

C-3

RE-WRITE FOR DIGITAL SOFT FIRMWARE

Before UPDATE the Digital Soft Firmware, it is necessary to install the WRITING TOOLS into the PC. For the installation of WRITING TOOL, refer to the "INSTALL FOR WRITING TOOLS".

Unplug the AC cord, and remove the back cabinet.

Using the Serial Communication Change JIG (JG201) and RS232 Cable, connect the PC terminal and UART

Connector(CP2402) on the MAIN PCB.

UART Connector(CP2402)

MAIN PCB

Connect it in order of MAIN PCB Serial Communication Change JIG(JG201) RS232 Cable PC.

Serial Communication Change JIG(JG201)

TO MAIN PCB

Insert the AC cord, turn on the power.

RS232 Cable

TO PC

Press both VOLUME DOWN button on the set and Channel button (2) on the remote control for 2 seconds.

Confirm that displayed software version. Set the Standby mode.

Set the DTV ROM DISC(JG176) to PC.

C-4

RE-WRITE FOR DIGITAL SOFT FIRMWARE

7. Start the "Winupload"(Writing tool).

8. Select the "Port Setting" from Process menu, then please set it as follows.

NOTE: This step is not necessary from next time.

C-5

RE-WRITE FOR DIGITAL SOFT FIRMWARE

Select the "Connect" from File menu.

Select the "Upload" from Process menu, and select the Software(CB00C74021.urt) in DTV ROM DISC(JG176).

10.

Unplug the AC cord on the set, then plug it in again.

11.

Turn on the power.

12.

The following window will appear, Up-date for Software will start. "Uploading inprogress" bar will begin to move.

C-6

RE-WRITE FOR DIGITAL SOFT FIRMWARE

13.

When the "Uploading inprogress" bar reaches a right edge, the Writing for Digital Soft Firmware will start. During the writing for Digital Soft Firmware, writing message will appear on the screen. Finish the writing for Digital Soft Firmware, writing message will disappear.

14.

Unplug the AC cord, and remove the Serial Communication Change JIG(JG201).

15.

Insert the AC cord again.

After the write, set to the initializing of shipping.

16.

Turn on the power.

17.

Press both VOLUME DOWN button on the set and Channel button (1) on the remote control for 2 seconds. The set will turn into the standby mode.

Check for the Firmware Version

18.

Turn on the power.

19.

Press both VOLUME DOWN button on the set and Channel button (2) on the remote control for 2 seconds. When the changed version displays, the Re-write will be completed.

20.

Select the "Disconnect" from File menu.

C-7

UPDATE FOR VCTP SOFTWARE

Before Update the VCTP Software, it is necessary to install the WRITING TOOLS into the PC. For the installation of WRITING TOOLS, refer to the "INSTALL FOR WRITING TOOLS".

Unplug the AC cord, and remove the back cabinet.

Short circuit the 1 pin and 2 pin of CP802 on the Main PCB.

Insert the AC cord.

Remove the short circuit 1 pin and 2 pin of CP802 on the Main PCB.

Set the EU LCD MICON VER UP ROM DISC (JG176) to PC.

Start the "VCTP" (Writing Tools).

Select the "LPT Preferences" from File/Preferences menu, then input "5" to the value of "Delay", and press "OK".

NOTE: This step is not necessary from next time.

Using the MICON PROGRAM JIG KIT 25-4 (JG203), connect the PC Terminal (LPT Port) and 1~4 pin of CP802 on the Main PCB (JG203(Red line) =1 pin of CP802).

CP802

Main PCB

C-8

UPDATE FOR VCTP SOFTWARE

Press the “TVT”.

Remove the check of “Bootloader Version”, and check it again.

10.

NOTE :

When the number of the side of the check box becomes 40, you can proceed to next step. If the number doesn’t become 40, check the connection and try again from step 1.

C-9

UPDATE FOR VCTP SOFTWARE

11.

Press the “Erase Flash”. Then, press the “C:\TV\MINTS8\Output\VCTP\Obj\Mints.bin” twice.

Press the , and select the writing Firmware.

12.

...

C-10

UPDATE FOR VCTP SOFTWARE

Select the “Address", then input the ”0x7ffff", and press the “OK”.

13.

Press the “Load Bin -> Flash”.

14.

The following window will appear, then writing will start. After the finishing of the writing, window will close.

Finish the writing, unplug the AC cord, and remove the MICON PROGRAM JIG KIT 25-4 (JG203).

15.

Insert the AC cord again, turn on the power.

16.

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

17.

Confirm that displayed version agreement with writing.

18.

C-11

UPDATE FOR EEPROM DATA

Before Update the EEPROM data, it is necessary to install the WRITING TOOLS into the PC. For the installation of WRITING TOOLS, refer to the "INSTALL FOR WRITING TOOLS".

Set to the standby mode, and remove the back cabinet.

Using the MICON PROGRAM JIG KIT 25-4 (JG203), connect the PC Terminal and Pin 1-4 of CP802 on the

Main PCB (JG203(Red line) =1 pin of CP802).

CP802

Main PCB

Set the EEP ROM DISC (JG212) to PC.

Start the "VCTP" (Writing Tools).

Press the "NVM".

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