Toshiba 32HL84 - TheaterWide HD - 32" LCD TV Original Betriebsanleitung

File No.01C2005002R

Date: Mar.11,2005

Rank: C

SERVICE INSTRUCTION

Product: LCD TV

Model: 26/32HL84, 26/32WL46B/G/C/A/E/R/T

CorrectiveAction: Backlight Lamp unit as a service part

Part No. Description Model applied

23587241 Back light unit 26HL84, 26WL46B/G/C/A/E/R/T

23587242 Back light unit 32HL84, 32WL46B/G/C/A/E/R/T

__________________

Hideto Kitamura

Manager

International Customer

Service & Support Dept.

Digital Media Network Company

CTV & Visual Media Equipment Div.

International Customer Service & Support Dept. [34F-A]

1-1,SHIBAURA 1-CHOME, MINATO-KU TOKYO 105-8001,JAPAN

PHONE:(03)3457-3536

FACSIMILE:(03)5444-9408

Product Safety Precautions:

Product Safety Precautions are described in Toshiba service manuals

020-200403 and 020-200405 for the model(s) covered in this bulletin. All

safety precautions and checks shall be complied with before returning the

equipment to the customer. Servicers who defeat safety features or fail to

perform safety checks may be liable for any resulting damages and may

expose themselves and others to possible injury.

Service Instruction

2004 LCD Television

Page 1 of 12

Model: 26HL84, 26WL46B/G/C/A/E/R/T

1. Cautions for Backlight Lamp Unit Replacement

 The backlight lamps used in the listed Liquid Crystal Display (LCD) modules are

consumables. Follow the included replacement procedures when replacing these

components.

 Disconnect AC power before starting the replacement procedure. The high

voltage applied to the backlight lamps produces an electrical shock hazard if

caution is not used when servicing this area.

 Backlight lamp units are fragile and caution should be used when handling.

 Ferrite cores are attached to the backlight lamp units with double-sided adhesive

tape. Use caution when removing these ferrite cores, as excessive force may

cause damage.

 Where possible, replace backlight lamp units in a clean and dust-free environment.

TFT-LCD Module Bottom view

Return FFC

INV board

(HOT)side

Flat cables

Ferrite cores

C board cover

INV board

(GND)side

C board

INV cover

Service Instruction

2004 LCD Television

Page 2 of 12

2. Removing C Board Cover and C Board

2.1. Remove the two screws securing the C board cover.

2-2. Remove the two screws securing the C board. Remove the C board and

connectors, using caution to remove the ferrite cores.

Use caution when removing the ferrite

cores, as excessive force may cause

damage.

Service Instruction

2004 LCD Television

Page 3 of 12

3. Removing INV Cover and INV Board (HOT Side / GND Side)

3-1. Remove the return FFC connected to the INV board.

3-2. Remove the three screws securing the INV cover.

3-3. Disconnect the seven lamp unit connectors and remove the three screws

securing the INV board (HOT side).

3-4. Disconnect the seven lamp unit connectors and remove the seven screws

securing the INV board (GND side).

Service Instruction

2004 LCD Television

Page 4 of 12

4. Removing Panel Unit and Lamp Holder

4-1. Remove the 20 screws securing the panel unit.

4-2. Remove the six screws securing the lamp holder.

Service Instruction

2004 LCD Television

Page 5 of 12

5. Replacing Lamp Units

5-1. Remove the old lamp units from the lamp clip, and replace them with new ones.

Be very careful not to break the lamp units when detaching/reattaching them. Keep

dust off the units.

Note: The seven lamp direct illumination system uses 14 CCFTs

(Cold Cathode Fluorescent Tubes) to provide backlighting for

the LCD display.

One lamp unit consists

of two lamps.

Small connector

Connected to INV board

(GND side)

Large connector

Connected to INV board

(HOT side)

Service Instruction

2004 LCD Television

Page 6 of 12

6. Assembly

6-1. Follow the lamp unit removal instructions in reverse order to re-assemble

the backlight lamp assembly. (Section2-5).

Assembly Cautions

 Handle fragile lamp units with extreme caution.

 Replace lamp units in a dust-free environment.

 Do not bend or pinch flat cables when installing the panel unit.

 Ferrite core may be damaged even by a slight shock. Attach ferrite cores

very carefully.

 Connect the connectors securely to the INV board.

Connect small connectors

to the INV board (GND

side).

Connect small connectors

to the INV board (HOT

side).

INV board (HOT side) INV board (GND side)

Panel unit

Flat cables

Service Instruction

2004 LCD Television

Page 7 of 12

Model: 32HL84, 32WL46B/G/C/A/E/R/T

1. Cautions for Backlight Lamp Unit Replacement

 The backlight lamps used in the listed Liquid Crystal Display (LCD) modules are

consumables. Follow the included replacement procedures when replacing these

components.

 Disconnect AC power before starting the replacement procedure. The high

voltage applied to the backlight lamps produces an electrical shock hazard if

caution is not used when servicing this area.

 Backlight lamp units are fragile and caution should be used when handling.

 Ferrite cores are attached to the backlight lamp units with double-sided adhesive

tape. Use caution when removing these ferrite cores, as excessive force may

cause damage.

 Where possible, replace backlight lamp units in a clean and dust-free environment.

TFT-LCD Module Bottom view

Return FFC

INV board

(HOT) side

Flat cables

Ferrite cores

C board cover

INV board

(GND) side

C board

Service Instruction

2004 LCD Television

Page 8 of 12

2. Removing C Board Cover and C Board

2.1. Remove the two screws securing the C board cover.

2-2. Remove the two screws securing the C board. Remove the C board and

connectors, using caution to remove the ferrite cores.

Use caution when removing the ferrite

cores, as excessive force may cause

damage.

Service Instruction

2004 LCD Television

Page 9 of 12

3. Removing INV Cover and INV Board (HOT Side / GND Side)

3-1. Remove the return FFC connected to the INV board.

3-2. Remove the four screws securing the INV cover.

3-3. Disconnect the eight lamp unit connectors from and remove the four screws

securing the INV board (HOT side).

3-4. Disconnect the eight lamp unit connectors from and remove the six screws

securing the INV board (GND side).

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