Hitachi 26LD9000TA, 32LD9000TA Schematic

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric

nless you are

Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter

and the AC/DC Power supply have

The Panel Module should not be touched with bare hands in order to protect its surface from

It is recommended that you use clean soft gloves during the replacement work in order to protect not

No.

26LD9000TA

Caution

Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful radiation and materials, various measures are provided in this LCD Television. Be sure to read cautionary items described in the manual before servicing.

shock, do not perform any servicing other than that described in the operating instructions u qualified to do so.

Service Warning

1. carefully and with caution in order not to receive injury.

2. Replacement work should be started after the Panel Module become sufficiently cool.

3. Special care should be taken when working near the display area in order not to damage its surface.

4. blemishes and damage.

5. only the display area of the Panel Module but also yourself.

1. Features ...................................... 3

Contents

8. Connection Diagram .............…28

32LD9000TA

2. Specifications............................... 4

3. Component names ......................6

4. Service points ..............................8

5. Adjustment...................................9

6. Troubleshooting......................... 15

7. Block Diagram ....................... …23

9. Wiring Diagram ......................... 29

10. Basic Diagram........................... 31

11. Printed wiring board diagram .... 33

12. Disassembly diagram................ 39

13. Replacement parts list............... 43

LCD Television

abels are parts

that require attention. You must follow the

presented throughout this User Manual to

The Monitor uses special tubes and tapes

ls. Moreover,

connection it is possible to sustain severe

servicing.Be sure to check everything that

ohm meter to confirm that the

the impedance value is less than 4M ohm,

CAUTION FOR SAFETY

Please read this page before repair the monitor. The following safety precautions are designed to help you stay safe and prevent accidents during the repair work.

 Please take note of these cautionary flags.

Warning

Caution

 Also note these cautionary icons

This means "CAUTION"

This means "Potential to sustain injury or even death."

This means "Potential to sustain breakage or irreparable damage."

This means "MUST"

This means "POTENTIAL ELECTRIC SHOCK"

This means "DO NOT"

WARNING

Follow instructions. Must use same types of wires and components.

The cabinet, chassis, and l

made from insulated materia

caution notes and safety instructions

prevent damage to them or injury to yourself.

Prevent electric shock.

Exercise caution while working on the device as the Monitor contains high voltage parts and power supply.It is possible to sustain severe injury or death if you accidentally touch the wrong parts.You must disconnect the power supply while servicing, reassembling, or change parts. If you touch a live

Perform safety check when done.

some materials are kept from making contact with the PWB for the sake of safety.Internal leads are kept from hot parts or high voltage parts by means of clamps or other measures. As such, you must restored these parts to their original conditions in order to prevent electric shock or fire.

Every part (such as removed screws, components, and wiring) must be restored to their prior conditions after

injury or death.

Use recommended components.

Use only the recommended components or componentst that structurally identical to the originals. This is to ensure safety and reliability. Pay special attention to parts in the parts list and circuit diagrams

marked with . If you use non-recommended components, then electric shock or fire may result.

was repaired for damage or mistakes. Also measure the insulated impedance with a megimpedance value is more than 4M ohm.If

then electric shock or fire may result.

Do not try to check the HDCP code and

combination circuit.

Never remove the shield case protecting the HDCP code and combination circuit.

PRECAUTIONS

 Cleaning the LCD panel of the television

Please make sure to unplug the power cord before cleaning the television.

● Wipe the panel with a lint-free and dry cloth in order to prevent damage to the panel surface.

● Do not use a chemical cloth or cleaner. Depending on the ingredients, it may cause discoloration and damage the panel surface.

● Do not wipe with a hard cloth or rub hard. It may hurt the panel surface.

● In case of the greasy dirt such as fingerprint, wipe with a lint-free cloth moistened by a diluted neutral detergent solution, and then wipe with a soft and dry cloth.

● Do not use a spray cleaner. It could cause malfunction.

 Cleaning the monitor's cabinet of the television

● The following may cause crack, deformation, and paint peeling.

● Do not wipe the cabinet with benzene, thinner, and other chemical products.

● Do not spray volatile solutions such as insecticide over the cabinet.

● Do not leave the cabinet in prolonged contact with plastic or rubber materials.

● Do not use a chemical cloth, cleaner or wax. Depending on the ingredients, it may cause crack and

deformation.

● Use a lint-free cloth to clean the cabinet and control panel of the television. In case of the heavy dirt, wipe

with a soft cloth moistened by a diluted neutral detergent solution, and then wipe with a soft and dry cloth.

● Never use the following detergents. It could cause crack, discoloration, and scratch.

● Acid/ alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax, glass

cleaner, etc.

1. Features

● Large-screen and high-definition LCD panel.

● Improved Digital signal processor.

● Accept more digital input devices with HDMI terminals.

● Great diversity of connecting terminals to cover wide range of audio-visual equipments.

● Enjoy the image from PC with large, high-definition LCD screen.

● Easy-to-use On-Screen Display system operating with Remote control.

● Low power consumption with Power Saving feature.

2. Specifications

SPECIFICATION 26LD9000TA 32LD9000TA

Panel

Approx. 26 inches

Display dimensions

Resolution 1366 (H) x 768 (V) pixels 1366 (H) x 768 (V) pixels

(576 (H) ×324 (V)mm,

diagonal 660.5mm)

Approx. 32inches (698 (H) x 392 (V) mm, diagonal 801mm)

including Stand:

Net dimensions

Net weight

Ambient conditions

Power supply AC110 - 240V, 50/60Hz

Power consumption/at standby 125W/<1W 135W/<1W

Audio output Speaker total 14W 20W

(VIDEO input)

Input terminals

Input signals

Output signals

Temperature

Relative Humidity

664(W)x508(H)x262(D) mm excluding Stand: 664(W)x471(H)x118.5(D) mm

including Stand:14kg excluding Stand:12.5kg

Operating: 5°C to 35°C, Storage: 0°C to 40°C

Operating: 20% to 80%, Storage: 20% to 90% (non-condensing)

AV1.2: composite video input terminal (RCA)

S video input terminal L/R audio input terminal (RCA)

AV3.4: component video input terminal (RCA)

L/R audio input terminal (RCA)

HDMI : HDMI input terminal Composite video: PAL, SECAM, NTSC3.58, NTSC4.43, PAL60

Component video: 480i, 576i, 480p, 576p, 720p/50, 720p/60, 1080i/50, 1080i/60

OUTPUT (MONITOR): composite video monitor-output terminal (RCA) OUTPUT (MONITOR): L/R audio monitor- output terminal (RCA) OUTPUT (HEADPHONE): L/R audio monitor- output terminal (Mini-pin) OUTPUT (SUB-WOOFER): Woofer output terminal

including Stand: 790(W)x585.5(H)x308.5(D) mm excluding Stand: 790(W)x550(H)x120(D) mm

including Stand:19.2kg excluding Stand:16.5kg

(RF input)

Input terminal / Receiving range ANT: 75Ω Unbalanced / 44~870MHz

PAL B, G, H / I / D, K

RF Video System

(RGB input)

Input terminals

Input signals 0.7 V, analog RGB (Recommended Signal)

Sync signals H/V separate, TTL level [2kΩ]

● The television takes at least 30 minutes to attain the status of optimal picture quality.

SECAM B, G / D, K / K1 NTSC-M

Analog RGB input terminal (D-sub 15-pin) Audio input terminal (3.5mm Stereo Mini Jack)

 The Expression of input signal mode (format)

With HDMI INPUT

No.

Signal Name

Signal mode

Resolution

Vertical

frequency

Horizontal frequency

(kHz)

Dot clock

frequency

(MHz)

Remarks

(Hz)

1 VGA 640x480 59.94 31.47 25.18 2 480i 720(1440)x480 60 15.75 27.00 3 480P 720x480P 60 31.5 27.00 4 576i 720(1440)x576 50 15.63 27.00 5 576P 720x576P 50 31.25 27.00 6 720P/60 1280x720 60 45 74.25 7 720P/50 1280x720 50 37.5 74.25 8 1080i/60 1920x1080 59.94 33.75 74.25 9 1080i/50 1920X1080 50 28.13 74.25

With RGB input

No.

Signal Name

Signal mode

Resolution

Vertical

frequency

Horizontal

frequency

(kHz)

Dot clock

frequency

(MHz)

Remarks

(Hz)

1 VGA 720 x 400 70.09 31.47 28.32 2 VGA 640 x 480 59.94 31.47 25.18 3 SVGA 800 x 600 56.25 35.16 36.0 4 SVGA 800 x 600 60.32 37.88 40.0 5 SVGA 800 x 600 72.19 48.08 50.0 6 XGA 1024 x 768 60.00 48.36 65.0 7 XGA 1024 x 768 70.07 56.48 75.0



The type of video board or connecting cable used may not allow for correct displays adjustment of Horizontal Position, Vertical Position, Horizontal Clock and Clock Phase.



The television may fail to display an animation image correctly when a signal having a vertical frequency of 72Hz or higher is input to it.



The television differentiates the signal modes according to the horizontal and vertical frequencies and the horizontal and vertical sync signal polarities. Note that different signals having all these elements alike may be handled as the same signal.



Displaying images with more than 768 lines of vertical resolution a Full display (compressed display) can result in the interpolation of stripes.

3. Component names

2 1

43 2 1

[Main unit]

Front Panel

1. Cabinet

2. Panel

3. Indicating Lamp

4. Remote Control Receiver

5. Speaker

6. Desktop Stand

7. Main Power Switch (on the left side)

Rear Panel

1. Side Input

2. Power Cord Socket

3. Terminal Board (External Device Connection)

4. Control Panel (see below for details)

26LD9000TA 32LD9000TA

Control Panel

These buttons are located on the top.

5, 6

3, 4

1. Sub Power button

2. Menu button

3. Program UP/  button

4. Program DOWN/  button

5. Volume UP / button

6. Volume DOWN /button

7. Input button

[Remote Control]

816

59 18

10 1

1. Power ON/OFF

2. [Color (Red, Green, Yellow, Blue)]

3. TV Select (TV)

Press this button to change input to TV.

4. Input Select (AV1/AV2/AV3/AV4/HDMI/RGB)

Press this button to change input mode.

5. Program Select

Press these buttons to select a TV program directly.

6. Freeze [Hold]

Press this button to change the picture to freeze mode.

7. MENU

8. Cursor

9. Volume Up/Down

10. MUTE

11. [Index]

12. Picture Size

Press this button to change picture size.

13. Recall

Pressing this button shows the input signal status.

14. [TV Text]

Teletext mode can be changed each time pressed in the following sequence. TV Teletext Mix mode

15. Return

You can use this to return to the previous menu.

16. OK

17. Picture Mode

Picture mode can be changed each time pressed in the following sequence. Dynamic Natural Cinema

18. Channel Up/Down[P +/-]

19. CHI/II

This is exclusively for TV audio A2/NICAM mode.

20. [Reveal]

21. [Sub Title]

22. [Cancel]

NOTE

Some buttons are only for Teletext mode, and other buttons have different functions in Teletext mode from the use of TV mode. Those buttons are indicated by

[ ]

4. Service points

The PWB assembly which has used lead free

 Lead-free solder

This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions before attempting any soldering work.

Caution: Always wear safety glasses to prevent fumes or molten solder from getting into

the eyes. Lead-free solder can splatter at high temperatures (600℃).

Lead-free solder indicator

Printed circuit boards using lead-free solder are engraved with an "F."

Properties of lead-free solder

The melting point of lead-free solder is 40-50℃ higher than leaded solder.

Servicing solder

Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended. Although servicing with leaded solder is possible, there are a few precautions that have to be taken. (Not taking these precautions may cause the solder to not harden properly, and lead to consequent malfunctions.)

Precautions when using leaded solder

 Remove all lead-free solder from soldered joints when replacing components.

 If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the

lead-free solder has been completely melted (do not apply the soldering iron without solder).

Servicing soldering iron

A soldering iron with a temperature setting capability (temperature control function) is recommended. The melting point of lead-free solder is higher than leaded solder. Use a soldering iron that maintains a high stable temperature (large heat capacity), and that allows temperature adjustment according to the part being serviced, to avoid poor servicing performance.

Recommended soldering iron:

 Soldering iron with temperature control function (temperature range: 320-450℃)

Recommended temperature range per part:

Part Soldering iron temperature

Mounting (chips) on mounted PCB 320ºC±30ºC

Mounting (chips) on empty PCB 380ºC±30ºC

Chassis, metallic shield, etc. 420ºC±30ºC

(1) IR PWB, SW PWB, KEY PWB, SIDE I/O PWB

(2) FORMATTER PWB

(3) POWER BOARD

5. Adjustment

55 75 11 0

26LD9000TA/ 32LD9000TA VGA Color Temperature Adjustment Procedure

5.1 Preparation

1. Set the signal generator (ASTRO VG859A or equivalent) to RGB, 1024*768, 60HZ, Level:0.7V, all

white pattern..

2. Turn on the set and select RGB source,perform pre-heat run more than 30 min. with Full white

pattern.

3. Prepare Minolta CA210,and calibration before adjustment.

4. Press 「Menu」key , Press 「ok」 to select [Picture][Reset]「Reset」「ok」.

Picture Picture Mode

Contrast

Brightness Color Sharpness

Tint

Color Temperature

Back Light Reset

Select OK Set Return

5. Press [Menu] key exit OSD.

Dynmaic

Cool

High

Reset

5.2 Entering into factory Mode:

In VGA mode, press “Red” key, next press “Green” key, next press “Return” key in remote control to

enter into factory mode.

Green

Factory Menu

NV CLEAR

Full Power

SourceCalibration

Reset Default

Aspect Ratio

Red

Return key

LH32CG v1.00 Oct 16.2006 21:40:50

WARM(6500K)

NORMAL(9300K)

COOL(15000K)

TimerClear

Shipping Mode

0 0 0 0 0 5 HOUR 58 MIN

5.3 Source Calibration (RGB)

0 0 0 0 0 5

HOUR

MIN

0 0 0 0 0 5

HOUR

MIN

◄ ►

1. Set the signal generator to RGB, Color bar pattern (level: 0.7V, color order from left side: white,

yellow, cyan, green,magenta, red, bule, black, width ratio: 12.5% for each color),

2. Entering into factory Mode: Press up or down key of remote control to select “Source Calibration”,

Press 「OK」 key to enter the item.

Factory Menu

LH32CG v1.00 Oct 16.2006 21:40:50

WARM(6500K)

NORMAL(9300K)

COOL(15000K)

TimerClear

Shipping Mode

-> Source calibration performed automatically.

5.4 Color Temperature Adjustment

26LD9000TA

1. Set the signal generator to RGB, 1024*768, 60HZ, Level:0.56V(80%). Full white pattern.

2. Press up or down key of remote control to select “Cool”, Press 「OK」 key to enter the item.

R, G, B drive values are set for COOL, NORMAL, and WARM independently.

NV CLEAR

Full Power

SourceCalibration

Reset Default

Aspect Ratio

Factory Menu

LH26CG v1.00 Oct 16.2006 21:40:50

WARM(6500K)

NORMAL(9300K)

COOL(15000K)

TimerClear

Shipping Mode

NV CLEAR

Full Power

SourceCalibration

Reset Default

Aspect Ratio

Factory Menu

COOL(15000K)

Col or Temp eratu re

Red

Green

Blue

◄

130

►

145

140

For Red drive, keep initial value (130).

Change Green, or Blue drive as follows;

- Press “Up” or “Down” key to select the item “R”, “G”, or “B”, and press [OK] key to enter.

- Press “Left” or “Right” key to set the value.

- Press [OK] key to exit.

3.Select 「Cool 15000」

(1) Cool：15000 K spec.:

x=0.266±0.001

y=0.270±0.001

(2) If the x and y value are larger than specification,

Decrease Green drive from default value. Increase Blue drive from default value.

(3) If the x or y or both x and y value is/are smaller than specification.

Decrease Blue drive from default value

(4) According to a x and y value, please following adjustment of (4)-1 or (4)-2.

(4)-1 If x value is higher than spec

Increase Green drive from default value. Increase Blue drive from default value.

(4)-2 If y value is higher than spec,

Decrease Green drive from default value

4.Select [Normal 9300]

Normal：9300 K spec.:

x=0.285±0.001

y=0.293±0.001

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

5.Select [WARM]

(1) WARM：6500 K spec.:

x=0.314±0.001

y=0.327±0.001

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

6. Exit Factory Mode:

After finish adjusting color temperature,press [MENU] to exit factory mode.

32LD9000TA

0 0 0 0 0 5

HOUR

MIN

1. Set the signal generator to RGB,

1024*768, 60HZ, Level:0.56V(80%

). Full white pattern.

2. Press up or down key of remote control to select “Cool”, Press 「OK」 key to enter the item.

R, G, B drive values are set for COOL, NORMAL, and WARM independently.

Factory Menu

LH32CG v1.00 Oct 16.2006 21:40:50

WARM(6500K)

NORMAL(9300K)

COOL(15000K)

TimerClear

Shipping Mode

NV CLEAR

Full Power

SourceCalibration

Reset Default

Aspect Ratio

Factory Menu

COOL(15000K)

Col or Temp eratu re

Red

Green

Blue

◄

►

140

►

125

►

127

For Red drive, keep initial value (140).

Change Green, or Blue drive as follows;

- Press “Up” or “Down” key to select the item “R”, “G”, or “B”, and press [OK] key to enter.

- Press “Left” or “Right” key to set the value.

- Press [OK] key to exit.

3.Select 「Cool 15000」

(1) Cool：15000 K spec.:

x=0.266±0.001

y=0.270±0.001

(2) If the x and y value are larger than specification,

Decrease Green drive from default value. Increase Blue drive from default value.

(3) If the x or y or both x and y value is/are smaller than specification.

Decrease Blue drive from default value

(4) According to a x and y value, please following adjustment of (4)-1 or (4)-2.

(4)-1 If x value is higher than spec

Increase Green drive from default value. Increase Blue drive from default value.

(4)-2 If y value is higher than spec,

Decrease Green drive from default value

4.Select [Normal 9300]

Normal：9300 K spec.:

x=0.285±0.001

55 75 11 0

y=0.293±0.001

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

5.Select [WARM]

(1) WARM：6500 K spec.:

x=0.314±0.001

y=0.327±0.001

Adjust G drive (GREEN) or B drive (BLUE) to set x and y above.

6. Exit Factory Mode:

After finish adjusting color temperature,press [MENU] to exit factory mode.

5.5 Color Temperature Check:

Press 「Menu」key , Press 「ok」 to select [Picture][Color Temp.][OK].

Picture Picture Mode

Contrast

Brightness Color Sharpness

Tint

Color Temperature

Back Light Reset

Select OK Set Return

Dynmaic

Cool

High

Reset

1. Select 「Cool」,check If the color temperature is in spec.

Color Temperature

Next/Prev ◄► Adjust Return

Cool：15000 K

x=0.266±0.005

y=0.270±0.005

Cool

2. Select [Normal],check If the color temperature is in spec.

0 0 0 0 0

2 HOUR 50 MIN

Color Temperature

Next/Prev ◄► Adjust Return

Normal

Normal：9300K

x=0.285±0.005

y=0.293±0.005

3. Select [Warm],check If the color temperature is in spec.

Color Temperature

Warm

Next/Prev ◄► Adjust Return

Warm：6500 K

x=0.314±0.005

y=0.327±0.005

5.6 Source Calibration (Component only support AV3 port used)

1. Set the signal generator to Component, Color bar pattern (level: 0.7V, color order from left side:

white, yellow, cyan, green, magenta, red, bule, black, width ratio: 12.5% for each color)

2. Entering into factory Mode):Press up or down key of remote control to select “Comp

Calibration”, Press 「OK」 key to start adjusting..

LH32CG v1.02 Oct 31.2006 18:10:34 1

WARM(6500K)

NORMAL(9300K)

COOL(15000K)

Factory Menu

NV CLEAR

Full Power

Comp Calibration

TimerClear

Shipping Mode

-> Source calibration performed automatically.

Reset Default

Aspect Ratio

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