Toshiba 40LV675D Schematic

LCD Color Television

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40LV675D

Ver. 2.01

ADJUSTMENT

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Service Mode

Entering to Service Mode

1. Press button once on remote control.

↓↓↓↓

↓↓↓↓

Service Mode display

2. Press button again and hold button down.

3. While holding the button, press MENU
button on TV set.

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Displaying the Adjustment Menu

Press MENU button on TV.

Service Mode

Press

Adjustment Mode

↑↑↑↑ ↓↓↓↓

Press

Key Function in the Service Mode

The following key entry during display of adjustment menu provides special functions.

CAUTION: Never try to perform initialization unless you have changed the

memory IC.

button (on remote control)

Test signal selection

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Selection of the adjustment items PROGRAMME (on TV or remote control)

Change of the data value Volume +/- (on TV or remote control)

Adjustment menu mode ON/OFF MENU button (on TV)

Initialization of the memory (IC510) "i+" + PROGRAMME button on TV

Reset the count of operating

protect circuit to "00"

Turn off TV Micro I2C bus communication "i+" + Volume button on TV

"RCUT" selection 1 button

"GCUT" selection 2 button

"BCUT" selection 3 button

"CNTX" selection 4 button

"COLC" selection 5 button

"UVTT" selection 6 button

Automatic A/D Adjustment

(PC, Component, Composite (PAL, NTSC))

Self diagnostic display ON/OFF 9 button

"i+" + PROGRAMME button on TV

7 button

Selecting the Adjusting Item

Every pressing of PROGRAMME button in the Service Mode changes the adjustment
items in the order of table below. ( button for reverse order)

SETTING & ADJUSTING DATA

[ SERVICE MODE ]

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Note:

The image system data of RCUT-BDRV is different by each image format.

The PAL value is indicated in the table.

Item Name of adjustment Address

RCUT RED CUT --

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GCUT GREEN CUT --

BCUT BLUE CUT --

RDRV RED DRIVE --

GDRV GREEN DRIVE --

BDRV BLUE DRIVE --

BRTC BRIGHTNESS CENTER --

COLC COLOR CENTER --

UVTT BASE BAND TINT --

CNTX CONTRAST MAX --

OPT1 TV SET OPTION 1 00F1

OPT2 TV SET OPTION 2 00F2

OPT3 TV SET OPTION 3 00F3

OPT4 TV SET OPTION 4 (PANEL OPT DATA FOR VENDOR & SIZE) 00F4

OPT5 TV SET OPTION 5 00F5

SETID MODEL ID 00FE

OPT6 TV SET OPTION 6 00E8

OPT7 TV SET OPTION 7 00E9

OPT8 TV SET OPTION 8 00EA

HTLID HOTEL ID 00E0

VOLX MAXIMUM VOLUME LEVEL --

Factory preset data will be loaded after setting Model ID data.

(Refer to Initialization of Memory Data of IC510 and setting data of signal board.)

Adjusting the Data

Pressing of VOLUME +/- button will change the value of data in the range from 00H to
FFH. The variable range depends on the adjusting item.

Setting TVOP

Enter Service Mode and select menu of TVOP by pressing P or P during display of

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adjustment menu. After selecting TVOP, press + or - to set I2C check function to
disable or enable as below.

TVOP FUNCTION DESCRIPTION 1 0 (Normal)

D5 (bit5) I2C check between TV-Micro and Standby-Micro (WDT) Disable Enable

Setting Panel Option Data

For a complete list of OPT4 data values corresponding to the model, see MODEL ID

TABLE.
Enter Service Mode and select menu of OPT4 by pressing P or P during display of

adjustment menu. After selecting OPT4, press + or - to set OPT4 value as table
below.

OPT4

Ex. OPT4 value 0x65 indicates that panel vendor is SAMSUNG and panel size is 32.

Upper 4bit is decided as below table.

OPT4 (Upper 4bit)

Panel

vendor

LGD 0 0 0 1

SHARP 0 0 1 0

CMO 0 0 1 1

AUO 0 1 0 0

IPS 0 1 0 1

SAMSUNG 0 1 1 0

D7

(bit7)

D6

(bit6)

D5

(bit5)

D4

(bit4)

D3

(bit3)

D2

(bit2)

D1

(bit1)

Lower 4bit is decided as below table.

D0

(bit0)

D7

(bit7)

Panel size 32 0 1 0 1

D6

(bit6)

OPT4 (Lower 4bit)

D5

(bit5)

D4

(bit4)

D3

(bit3)

D2

(bit2)

D1

(bit1)

D0

(bit0)

37 0 1 1 0

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40 1 1 1 0

42 0 1 1 1

46 1 0 1 0

47 1 0 0 0

52 1 0 1 1

55 1 1 0 0

Convert from Bit (Binary) to Hex

The table for converting from bit (D7-D0) to hex (0x**).

BIT (Binary)

High nibble

Low nibble

HEX

D7 D6 D5 D4

D3 D2 D1 D0

0

1

2

3

4

5

6

7

8 1

9 1

A 1

B 1

0 0 0 0

0 0 0

0 0

0 0

0

0

0

0

1

1

1 1

1 1 1

0 0 0

0 0

0

0

1

1 1

0 0

0

1

1 1

1

0

1

0

1

0

C 1 1

D 1 1

E 1 1 1

F 1 1 1 1

0 0

0

1

0

E.g. If Bit D7-0 = 0101 1010, Hex data is 0x5A.

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Exit from Service Mode

Pressing POWER button to turn off the TV once.

Initialization of TV Micro Data

After replacing Digital Board, the following initialization is required.

1) Enter Service Mode.

2) Select menu of ID by pressing P or P during display of adjustment menu in the
Service Mode.

3) Change ID data into MODEL ID to initialize by pressing + or -, refer to
"MODEL ID TABLE".

For example, if want to initialize 40LV685D, change MODEL ID into "0x3E".

Note:

MODEL ID is hex value.

4) Execute initialization of the memory.

Refer to "KEY FUNCTION IN THE SERVICE MODE".
Press "i+" + PROGRAMME button on TV.

5) Enter Service Mode and select Version Check Mode. Confirm if the model name and

MODEL ID set is correct. If not, do over again from the start.

Note:

In case initialization by setting wrong MODEL ID is done, there is a possibility of

abnormal display.

6) Check the picture carefully. If necessary, adjust any adjustment item above.

Perform "Auto tune" on the owner's manual.

MODEL ID TABLE

MODEL ID (HEX) Model name Panel vendor OPT4 Data (HEX)

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0x3D 32LV685D/LV675D SAMSUNG 0x65

0x3E 40LV685D/LV675D SAMSUNG 0x6E

0xE5 32LV665D SAMSUNG 0x65

0xE6 40LV665D SAMSUNG 0x6E

Initializing Data setting flowchart after replacing the Signal Unit

Test Signal Selection

Every pressing of button on the remote control changes the built-in test patterns on
screen as described below in Service Mode.

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Picture Signal

Red raster

Green raster

Blue raster

All Black

All White

Self Diagnostic Function

1. Press "9" button on remote control during display of adjustment menu in the Service

Mode. The diagnosis will begin to check if interface among IC's is executed properly.

2. During diagnosis, the following displays are shown.

* Self check displays and items are subject to the models.

TV CPU SW Version:

NG: No Sync Detected

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Version information of TV Micro SW: Display 1 byte data. (Hex)

EEPROM Version:

Version information of TV Micro EEPROM: Display 1 byte data. (Hex)

Power On Time: Total time the TV has been powered on. (Unit: Hours) (Decimal)

Main PLL: Displays Data 11 - Data 18 (8 bytes) of tuner control data. (Hex)

BL_STATUS:

BL_STATUS 1 : The total number of times that the panel did not light. (backlight double-

light also failed) (Decimal)

BL_STATUS 2 : The number of times that the backlight failed to light. (Decimal)

Block:

UV : ATV reception mode

V1 - V7 : VIDEO 1-7 input mode.

DTV : DTV mode

For current input: OK: Signal Sync Detected

TV Status: "official" is normal.

Bus Errors: "none" is normal.

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Block:

UV ATV

V1

(SCART (FULL))

V2

(SCART (S+AV))

V3

V4 HDMI1

V5 HDMI2

V6 HDMI3

V7 HDMI4

V8 --

V9 --

PC PC

YUV

DTV DTV (Digital Only)

(Composite)

(Component)

1

2

3

3

Version Check Mode

1. Press "9" button twice on remote control during display of adjustment menu in the

Service Mode.

2. During Version Check, the following displays are shown.

* Version check displays and items are subject to the models.

TV Model:

NG

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TV Model ID:

Boot Code Version:

Core SW Version:

Seine SW Version:

TV Micro SW Version:

Version information of TV Micro SW. Display 1 byte data.

TV Micro EEPROM Version:

Version information of EEPROM. Display 1 byte data.

EDID Checksum:

Pass/Fail Result Listed for HDMI 1-4 (left to right)

Global Data Version:

Version information of panel/picture data (string)

LCD Panel Opt:

Panel Option (OPT4) Data. Display 1 byte data.

(see Setting Panel Option Data)

Factory Test Status:

Optional Data Bits that is used by factory.

Country Shipout ID:

Country/Region TV is configured for. Options are: UK, France, Continental, Russia, Nordic

A/D Adjust COMP: Component input

OK A/D adjustment set correctly.

A/D adjustment set incorrect.

-- A/D adjustment is not needed because the picture format is not used.

A/D Adjust RGB: RGB (SCART or PC) input

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OK/NG/-- Same as "A/D Adjust COMP"

Setting Hotel Mode

Hotel Mode allows the customized settings for following hotel options according to various

hotel requirements.



Enable/Disable all Front Panel keys.



Enable all Front Panel keys except for Input Selection key.



Enable/Disable the remote control.



Disable access to all Setup menu items except for Language Setting.



Disable access to the Setup menu (grayed out).



Limit the maximum Volume level.



Force POS/VIDEO Channel/Input, when the TV is turned on.



Force volume setting, when the TV is turned on.



Force picture setting when the TV is turned on.



Force the TV on while main power (AC power) is ON.

There are three ways to set up Hotel Mode Options: via Service Mode, Hotel Mode Settings

menu, and Hotel Clone menu.

Setting Hotel Mode via Service Mode

Enter Service Mode and select Hotel Mode menu by pressing P or P .
After selecting Hotel Mode, press + to enter details setting in Hotel Mode.

To select menu, press P or P and press OK to enter the adjustment menu of following

table data.
To move the cursor in the adjustment, press + or -.

1. By pressing P or P , following table data setting will change the value either 1 or 0

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on selected items as follows;

OPT2

OPT2 FUNCTION DESCRIPTION 1

D7 (bit7) Enable mode that TV standby will be

appeared in forced when turning the

main power ON

D6 (bit6) Enable mode that TV On will be

appeared in forced when turning the

main power ON

D5 (bit5) FRONT Key Disable Enable

D4 (bit4) All keys except input selector key

(Video/TV)

D3 (bit3) User remote control operation Disable

D2 (bit2) Disable SET UP MENU except

language.

(tuning etc.)

Enable

(This function is ignored

when D6 is set to 1.)

Enable Disable

Disable Enable

(Only setting of Service

Mode and Super User

mode are possible.)

Disable

(Display language only)

0

(Normal)

Disable

Enable

Enable

D1 (bit1) Disable SETUP MENU Disable Enable

D0 (bit0) HOTEL Mode On (Enable the setting of

D1 to D7)

VOLX

Off

(Normal)

Set speaker volume to suitable sound volume level.

VOLX FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) ~

D0 (bit0)

Max Limiter of Volume Control 0x00 ~ 0x64

OPT6

OPT6 FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) Enable mode that POS or VIDEO program Enable Disable

number will be appeared in forced when turn

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ON the main power

D6 (bit6) ~

D0 (bit0)

POS or VIDEO program number 0 ~ 127 [decimal] (Normal: 0)

POS number: 0 ~ 99

VIDEO number: 100 ~ 127

(DTV = 100, VIDEO = 101,

VIDEO = 102..)

100 is used as ATV when

DTV option is disable.

OPT7

OPT7 FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) Enable mode that speaker volume will be set

in forced when turning the main power ON

D6 (bit6) ~

D0 (bit0)

Forced speaker volume 0 ~ 100 [decimal] (Normal: 0)

Enable Disable

Value above 100 is no effect.

OPT8

OPT8 FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) ~

D4 (bit4)

D3 (bit3) RF tuning operation by position up/down on

remote or front panel of the TV set, number,

and previous key when HDMI or PC input

D2 (bit2) Enable mode that picture mode will be set in

forced when turning the main power ON

D1 (bit1) ~

D0 (bit0)

Forced picture mode 0 [dec]: Auto View (Normal)

No use - -

Disable Enable

Enable

1 [dec]: Dynamic

2 [dec]: Standard

3 [dec]: Movie

Disable

Setting Hotel Mode via Hotel Mode Settings Menu

↓↓↓↓

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1. Press button once on remote control.

2. Press button again and hold button down.

↓↓↓↓

(Hotel Mode Settings menu)

4. To enable Hotel Mode, use the or buttons to select "On" while "Hotel Mode" item

is highlighted. When Hotel Mode is on, the various options are enabled.

3. While holding the button, press P button

on TV set.

5. Press and buttons to select the item, and then press and

buttons to change the

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setting.

6. Press [Exit] button to finish Hotel Mode setting.

Settings in "Hotel Mode Settings" menu

Hotel Mode

Setting

Hotel Mode Off Disable OPT2, D0 0

Control Panel On Enable all front panel keys OPT2, D5 ~ D4 00

Remote On Enable OPT2, D3 0

SETUP Menu On Enable access to Setup menu OPT2, D2 ~ D1 00

Options Description

On Enable 1

Off Disable all front panel keys 10

Off

(Except

Input)

Off Disable

Disable all front panel keys except

for "Input"

(except for Service Mode function)

Corresponding

Option Data

Value

01

1

Off Disable access to Setup menu 01

Off

(Except

Language)

Max Volume 0 ~ 100 Limited maximum volume level VOLUX, D7 ~ D0 0x00

Change

POS/VIDEO

POS/VIDEO

(only available

when "Change

Off TV Tunes to the last channel or

On TV tunes to preset

0 ~ 99 0 ~ 99

Disable access to Setup menu

except for Language Setting

input viewed when the TV is turned

on

"POS/VIDEO" (channel/input) when

the TV is turned on

(ATV Channel Position)

10

~

0x64

OPT6, D7 0

1

OPT6, D6 ~ D0 0x00

~

0x63

POS/VIDEO" is

Force TV volume level when the TV

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On)

100 DTV Input

(ATV Input if DTV disabled)

0x64

101 ~ 108 External Inputs

101 (Video 1), 102 (Video 2), ...108

(PC)

Change Volume Off The last TV volume level remains

not changed.

On

is turned on

Volume

(only available

when "Change

Volume" is On)

Change

Selectable

Picture

0 ~ 100 Preset speaker volume when the

TV is turned ON

Off The last Picture Setting Mode

remains not changed

On Force Picture Setting Mode to

"Selectable Picture" mode when

the TV is turned on

0x65

~

0x6C

OPT7, D7 0

1

OPT7, D6 ~ D0 0x00

~

0x64

OPT8, D2 0

1

Selectable

Picture

(only available

when "Change

Selectable

Picture" is On)

Change TV

Power

Position Change

on HDMI/PC

Input

AutoView Force Picture Mode to AutoView

when the TV is turned on

Dynamic Force Picture Mode to Dynamic

when the TV is turned on

Standard Force Picture Mode to Standard

when the TV is turned on

Movie Force Picture Mode to Movie when

the TV is turned on

Disabled TV returns to previous Standby/On

State when the main power is

applied

Force On Force TV ON when the main power

is applied

Force

Standby

On

Off When the input source is HDMI or

Force TV Standby when the main

power is applied

RF tuning by P , P , and

RETURN keys is enabled

PC Input, RF tuning by P , P ,

and RETURN keys is disabled

OPT8, D1 ~ D0 00

01

10

11

OPT2, D7 ~ D6 00

01

10

OPT8, D3 0

1

The following Hotel Mode Options can be copied to other same model TVs using USB Drive

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Copying Hotel Mode Options via Hotel Clone Menu

via Hotel Clone menu:



OPT2



OPT6



OPT7



OPT8



VOLX



DTV Channel Setup



ATV Channel Setup



Programme (position)



System



Colour System



Programme Skip



AFT



Label

Saving the Hotel Mode Settings of the TV to USB Drive

1. Configure the hotel mode settings via Service Mode or the Hotel Mode Settings menu.

2. Enter Hotel Clone menu by following steps a - c.

a. Press button once on remote control.

↓↓↓↓

button

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b. Press button again and hold button down.

↓↓↓↓

(Hotel Clone menu display)

3. Press or buttons to select "TV to USB".

c. While holding the button, press P

on TV set.

4. Insert a USB Drive and press OK to copy the settings to the USB Drive.

5. After copy is completed successfully and the message is shown, remove the USB

Drive.

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Loading the Hotel Mode Settings from USB Drive to TV

1. Enter Hotel Clone menu as shown in previous section.

2. Select "USB to TV" by pressing or buttons.

3. Insert the USB drive carrying the copied settings, and press OK to copy settings to the

TV.

4. After the copy is completed successfully, the message is shown and the set reboots

automatically.

5. Remove the USB drive.

6. If the copy is not completed, an error message is shown and the set does not reboot.

Repeat from step-a again, or repeat the steps of saving from TV to USB Drive.

LED Indications

The LEDs on the TV (at the bottom of the TV) indicate the TV's status, as described below.

There are 3 LEDS (from left to right): PowerOn/Standby, OnTimer, ProgramTimer.



PowerOn/Standby LED



Red ON (solid) = The TV power cord is plugged in, but TV is in Standby.



Green ON (solid) = The TV is powered on.



OnTimer LED



Green ON (solid) = The OnTimer is set.



Plug the power cord in again and turn ON

Plug the power cord in again and turn ON

Plug the power cord in again and turn ON

Plug the power cord in again and turn ON

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ProgrammeTimer LED



Orange ON (solid) = The On timer is set.



Red ON (solid) = The On timer is operating.

1 PowerOn/Standby LED:

2 PowerOn/Standby LED:

3 PowerOn/Standby LED:

4 OnTimer LED:

LED Indication Condition Solution

Green blinks continuously.

Other LEDs: OFF.

Red blinks continuously.

Other LEDs: OFF.

Orange blinks continuously.

Other LEDs: OFF.

Green blinks continuously.

Other LEDs: OFF.

BUS Error Turn OFF the TV and unplug the power

cord.

the TV.

Power Protect

Error

Back Light Error Turn OFF the TV and unplug the power

Fan Stop Error Turn OFF the TV and unplug the power

Turn OFF the TV and unplug the power

cord.

the TV.

cord.

the TV.

cord.

the TV.

DTV Software Update - While Watching TV

1. Extract the update files onto a USB drive.

2. Turn on the TV set.

3. Connect the USB drive to the USB port on the side panel.

The following message is displayed:

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4. Highlight OK and press the OK key on the remote.

5. The status of the update is displayed during update.

Never turn off the power while updating.

6. When the update is complete, the following message is displayed.

7. Disconnect the USB drive.

8. The TV set is automatically turned off and then on.

DTV Software Update - from Boot Up

1. Extract the update files onto a USB drive.

2. Unplug the TV.

3. Connect the USB drive to the USB port on the side panel.

4. Press and hold the menu button on the control panel of the TV set.

After several seconds, the orange PowerOn/Standby LED and the green OnTimer

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5. Plug in the TV and watch the LEDs on the front of the TV set.

a.

LED light is on, indicating that the TV set is being updated.

b. Once the update started, release the menu button.

6. When only the PowerOn/Standby LED is turned to green, the update has completed

successfully.

If the update is unsuccessful, the PowerOn/Standby LED is red.

7. Unplug the TV set.

8. Disconnect the USB drive.

FUNCTION AND OPERATION

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Remote Control

Simple at-a-glance reference of your remote control.

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FUNCTION AND OPERATION

television. Whilst all the necessary adjustments and controls for the television are made using

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TV Front and Side Panel Control

A wide variety of external equipment can be connected to the input sockets on the side of the

the remote control, the buttons on the television may be used for some functions.

FUNCTION AND OPERATION

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Tuning the Television for the First Time

Before switching on the television, put your decoder and media recorder, if applicable, to

Standby

. To set up the television, use the buttons on the remote control as detailed.

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SAFETY INSTRUCTION

should enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the

When attaching the LCD module to the LCD cover, position it appropriately and fasten

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Handling the LCD Module

Safety Precaution

In the event that the screen is damaged or the liquid crystal (fluid) leaks, do not breathe in or

drink this fluid.

Also, never touch this fluid. Such actions could cause toxicity or skin irritation. If this fluid

skin or clothing, wipe off with alcohol, etc., and rinse thoroughly with water. If the fluid

should enter the eyes, immediately rinse the eyes thoroughly with running water.

Precautions for Handling the LCD Module

CAUTION: The metal edges of the LCD module are sharp, handle it with

care.

The LCD module can easily be damaged during disassembly or reassembly; therefore,

always observe the following precautions when handling the module.

1.

at the position where the display can be viewed most conveniently.

2. Carefully align the holes at all four corners of the LCD module with the corresponding

holes in the LCD cover and fasten with screws. Do not strongly push on the module

because any impact can adversely affect the performance. Also use caution when

handling the polarized screen because it can easily be damaged.

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3. If the panel surface becomes soiled, wipe with cotton or a soft cloth. If this does not

remove the soiling, breathe on the surface and then wipe again.

If the panel surface is extremely solied, use a CRT cleaner as a cleaner. Wipe off the

panel surface by drop the cleaner on the cloth. Do not drop the cleaner on the panel.

Pay attention not to scratch the panel surface.

4. Leaving water or other fluids on the panel screen for an extended period of time can

result in discoloration or stripes. Immediately remove any type of fluid from the screen.

5. Glass is used in the panel, so do not drop or strike with hard objects. Such actions can

damage the panel.

6. CMOS-LSI circuitry is used in the LCD module, so avoid damage due to static

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electricity. When handling the module, use a wrist ground or anchor ground.

7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an

extended period of time.

8. Do not store the LCD module below the temperature conditions described in the

specifications. Failure to do so could result in freezing of the liquid crystal due to cold

air or loss of resilience or other damage.

9. Do not disassemble the LCD module. Such actions could result in improper operation.

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10. When transporting the LCD module, do not use packing containing epoxy resin

(amine) or silicon resin (alcohol or oxim). The gas generated by these materials can

cause loss of polarity.

PANEL IDENTIFICATION

name, the identification marking will be shown at the last digit of the set serial number on the

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Panel Identification

If the several panels are alternatively used in the same model without amending the model

specification label on the back cover.

In servicing, do not alter the panel because several setting and parts are different.

Marking Panel Vendor Marking Panel Vendor Marking Panel Vendor

A AUO J

B

C CMO L LGD U

D

E

F

G

H IPS R

K SAMSUNG T

M

N

P

Q

S SHARP

V

W

X

Y

Z

With this alternative use, some of key parts may differ and their combinations are

indicated with the suffix marking on the location number in the part list

(Miscellaneous).

e.g.

Location No. Part No. Description

B001A

B001B

MZ01A

MZ01B

Please refer to the Parts List for correct part numbers.

75XXXXXX LCD Panel, 32" LGD

75XXXXXX LCD Panel, 32" AUO

75XXXXXX LDVS Cable for 32" LGD Panel

75XXXXXX LDVS Cable for 32" AUO Panel

U02A

KEY

U01A
MAIN

POWER

U03A

AC SW

U04A LED

U04B RMT

SAFETY INSTRUCTION

Always keep tools, components of the product, etc away from the children, These items

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WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY

PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.

Safety Precaution

WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE

UNFAMILIAR WITH THE NECESSARY PRECAUTIONS ON THIS RECEIVER.

THE FOLLOWING ARE THE NECESSARY PRECAUTIONS TO BE OBSERVED

BEFORE SERVICING THIS CHASSIS.

1. An isolation transformer should be connected in the power line between the receiver

and the AC line before any service is performed on the receiver.

2. Always disconnect the power plug before any disassembling of the product. It may

result in electrical shock.

3. When replacing a chassis in the cabinet, always be certain that all the protective

devices are put back in place, such as nonmetallic control knobs, insulating covers,

shields, isolation resistor-capacitor network, etc.

4.

may cause injury to children.

5. Depending on the model, use an isolation transformer or wear suitable gloves when

servicing with the power on, and disconnect the power plug to avoid electrical shock

when replacing parts. In some cases, alternating current is also impressed in the

chassis, so electrical shock is possible if the chassis is contacted with the power on.

6. Always use the replacement parts specified for the particular model when making

repairs. The parts used in products require special safety characteristics such as

inflammability, voltage resistance, etc. therefore, use only replacement parts that have

NEVER remodel the product in any way. Remodeling can result in improper operation,

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these same characteristics. Use only the specified parts when the mark is indicated
in the circuit diagram or parts list.

7. Parts mounting and routing dressing of wirings should be the same as that used

originally. For safety purposes, insulating materials such as isolation tube or tape are

sometimes used and printed circuit boards are sometimes mounted floating. Also make

sure that wirings is routed and clamped to avoid parts that generate heat and which use

high voltage. Always follow the manufactured wiring routes / dressings.

8. Always ensure that all internal wirings are in accordance before re-assembling the

external casing after a repairing completed. Do not allow internal wiring to be pinched

by cabinets, panels, etc. Any error in reassembly or wiring can result in electrical

leakage, flame, etc., and may be hazardous.

9.

malfunction, or electrical leakage and flame, which may be hazardous.

10. Touch current check. (After completing the work, measure touch current to prevent an

electric shock.)



Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer

for this check.



Connect a measuring network for touch currents between each exposed metallic part

on the set and a good earth ground such as a water pipe.

Annex D

(normative)

Measuring network for TOUCH CURRENTS

Resistance values in orms (Ω).

V: Voltmeter or oscilloscope

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(r.m.s. or peak reading)

Input resistance : 1 MΩ
Input capacitance : 200 pF

Frequency range : 15 Hz to 1 MHz and d.c. respectively

Appropriate measures should be taken to obtain the correct value in case of non

Note:

sinusoidal waveforms.

The measuring instrument is calibrated by comparing the frequency factor of with the
solid line in figure F.2 of IEC 60990 at various frequencies. A calibration curve is
constructed showing the deviation of from the ideal curve as a function of frequency.

TOUCH CURRENT = /500 (peak value).



The potential at any point (TOUCH CURRENT) expressed as voltage and
does not exceed the following value:

The part or contact of a TERMINAL is not HAZARDOUS LIVE if:

a) The open-circuit voltage should not exceed 35 V (peak) a.c. or 60 V d.c. or, if a) is not

met.

b) The measurement of the TOUCH CURRENT shall be carried out in accordance with

IEC 60990, with the measuring network described in

The TOUCH CURRENT expressed as voltages and , does not exceed the
following values:

- for a.c. : = 35 V (peak) and = 0.35 V (peak);

- for d.c. : = 1.0 V

The limit values of = 0.35 V (peak) for a.c. and = 1.0 V for d.c. correspond to

Note:

the values 0.7 mA (peak) a.c. and 2.0 mA d.c.

Annex D

of this standard.

Product Safety Notice

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Many electrical and mechanical parts in this chassis have special safety-related

characteristics. These characteristics are often passed unnoticed by a visual inspection and

the protection afforded by them cannot necessarily be obtained by using replacement

components rated for higher voltage, wattage, etc. Replacement parts which have these

special safety characteristics are identified in this manual and its supplements; electrical

components having such features are identified by the international hazard symbols on the

schematic diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The

use of substitute replacement parts which do not have the same safety characteristics as

specified in the parts list may create electrical shock, fire, or other hazards.

SPECIFICATION

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SCHEMATIC DIAGRAM

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Precaution

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY

RADIATION PRECAUTION" FOR DIRECT VIEW CTV ONLY, "SAFETY

PRECAUTION" AND "PRODUCT SAFETY NOTICE" OF THIS MANUAL.

CAUTION: The international hazard symbols " " in the schematic diagram
and the parts list designate components which have special characteristics

important for safety and should be replaced only with types identical to

those in the original circuit or specified in the parts list.

The mounting position of replacements is to be identical with originals.

Before replacing any of these components, read carefully the SAFETY

PRECAUTION and PRODUCT SAFETY NOTICE.

Do not degrade the safety of the receiver through improper servicing.

Note:

1. RESISTOR

Resistance is shown in ohm [K=1,000, M=1,000,000]. All resistors are 1/6 W and 5 %

tolerance carbon resistor, unless otherwise noted as the following marks.

1/2R : Metal or Metal oxide of 1/2 watt

1/2S : Carbon composition of 1/2 watt

1RF : Fuse resistor of 1 watt

10 W : Cement of 10 watt

K : ±10 %

G : ±2 %

F : ±1 %

2. CAPACITOR

Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in

µF, and the values more than 1 in pF.

All capacitors are ceramic 50 V, unless otherwise noted as the following marks.

= Electrolytic capacitor

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= Mylar capacitor

3. The parts indicated with " " have special characteristics, and should be replaced with
identical parts only.

4. Voltages read with DIGITAL MULTI-METER from point indicated to chassis ground,

using a color bar signal with all controls at normal, line voltage at nominal AC volts.

5. Waveforms are taken receiving color bar signal with enough sensitivity.

6. Voltage reading shown are nominal values and may vary ±20 % except H.V.