Toshiba 15DL15, 15DL75, 20DL75 Schematic

FILE NO. 050-200513

DOCUMENT CREATED IN JAPAN, Sept., 2005

SERVICE MANUAL

LCD Color Television

15DL15 15DL75 20DL75

TOSHIBA CORPORATION 2005

Published in Japan, Sep. 2005 (YC)

TABLE OF CONTENTS

SERVICE SAFETY PRECAUTIONS ........................................................................................................................................ 3

HANDLEING THE LCD MODULE ........................................................................................................................................... 5

1. SERVICE MODE .................................................................................................................................................................. 7

1-1. STARTING SERVICE MODE ......................................................................................................................................... 7

2. ADJUSTMENT ..................................................................................................................................................................... 8

2-1. ADJUSTMENT TOOLS AND CONDITIONS ................................................................................................................. 8

2-2. AUTO GAIN/OFFSET ADJUSTMENT ........................................................................................................................... 8

2-3. DDC EDID DATA READ & WRITE ................................................................................................................................. 9

3. VCTI FIRMWARE INSTALLATIONS/UPGRADING ............................................................................................................ 19

3-1. VCTI FIRMWARE INSTALLATIONS ............................................................................................................................ 20

3-2. SCALER FIRMWARE INSTALLATIONS...................................................................................................................... 26

4. TROUBLESHOOTING........................................................................................................................................................ 33

5. EXPLODED VIEW .............................................................................................................................................................. 39

6. CHASSIS AND CABINET REPLACEMENT PARTS LIST ................................................................................................. 40

7. PC BOARDS TOP & BOTTOM VIEW................................................................................................................................. 50

8. SCHEMATIC DIAGRAM ..................................................................................................................................................... 54

8-1. WIRING DIAGRAM ...................................................................................................................................................... 55

8-2. BLOCK DIAGRAM (20DL75) ....................................................................................................................................... 56

8-3. BLOCK DIAGRAM (15DL15,15DL75) ......................................................................................................................... 57

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

SERVICE SAFETY PRECAUTIONS

• The caution items shown here describe major safety issues and should always be observed.

• The meanings of the various indications are as follows.

WARNING

CAUTION

* Physical damage means major damage to a home, furnishings and other possessions.

Examples of marks

SHOCK HAZARD

PROHIBIT DISASSEM-

BLING

UNPULUG

Indicates a hypothetical situation in which service personnel and nearby third parties, or even end users due to a product defect after the service operation is completed, could possibly be in danger of injury or even death in the event of operational error.

Indicates a hypothetical situation in which service personnel and nearby third parties, or even end users after the service operation is completed, could possibly be in danger of injury, or where there could be physical damage in the event of operational error.

The" indicates caution (including danger and warning).

The actual meaning of this caution is indicated inside the The example shown to the left indicates the danger of "electrical shock".

The

indicates a forbidden action. The actual meaning of this caution is indicated inside the The example shown to the left indicates that disassembly is forbidden.

The

indicates a forced action (an action that must be performed). The actual meaning of this forced action is indicated by The example shown to the left indicates that the power plug must be disconnected.

or nearby illustrations or text.

KEEP CHILDREN

AWAY

UNPULUG

SHOCK HAZARD

USE SPECIFIED

PARTS

CAUTION FOR

WIRING

CAUTION FOR

ASSEMBLING /

WIRING

WARNING

• Always advise users to keep children away. There is danger of injury to children from tools, disassembled products, etc.

• Always disconnect the power plug before starting work whenever power is not required. Failure to disconnect the power plug before starting work can result in electrical shock.

• Depending on the model, use an insulation transformer or wear 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.

• Always use the replacement parts specified for the particular model when making repairs. The parts used in products have the necessary safety characteristics such as inflammability, voltage resistance, etc.; therefore, use only replacement parts that have these same characteristics. Use only the specified parts when the

• Parts mounting and routing of the wiring should be the same as that used originally. For safety purposes, insulating materials such as tubing or tape is sometimes used and printed circuit boards are sometimes mounted floating. Also make sure that wiring is routed and clamped to avoid parts that generate heat and which use high voltage. Always follow the original scheme.

• After a repair has been completed, reassemble all disassembled parts, and route and reconnect the wiring, in accordance with the original scheme. 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.

mark is included in a circuit diagram or parts list.

CHECK INSULATION

RESISTANCE

PROHIBIT

REMODELING

• After completing the work, disconnect the power plug from the outlet, remove the antenna, turn on the power switch. Then, use a 500V insulation resistance meter to check the insulation resistance of the antenna terminal, other metallic parts and between the prongs of the power plug to make sure that the insulation resistance is 1M 1 or more. The set will require inspection and repair if the insulation resistance is below this value.

• Never remodel the product in any way. Remodeling can result in improper operation, malfunction, or electrical leakage and flame, which may be hazardous

HANDLING THE LCD MODULE

a n

r r

Safety Precautions

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 should enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the 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 LCD module can easily be damaged during disassembly or reassembly; therefore, always observe the following precautions when handling the module.

1. When attaching the LCD module to the LCD cover, position it appropriately and fasten at the position where the display can be viewed most conveniently.

The metal edges of the LCD module are sharp, handle it with care.

3. If the panel surface becomes soiled, wipe with cotton or soft cloth. If this does not remove the soiling, breathe o the surface and then wipe again. If the panel surface is extremely solied, use a CRT cleane as a cleaner. Wipe off the panel surface by drop the cleane on the cloth. Do not drop the cleaner on the panel. Pa attention not to scratch the panel surface.

4. Leaving water or other fluids on the panel screen for a extended period of time can result in discoloration o stripes. Immediately remove any type of fluid from th screen.

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.

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

6. CMOS-LSI circuitry is used in the LCD module, so avoi damage due to static electricity. When handling the mod ule, 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.

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.

1.Service Mode

1-1.Starting Service Mode

*Set LCD TV to the normal TV signal receive mode.

Note: In this "Service Mode" section, [ ] shows a button.

1-1-1. Press [MUTE] on the remote control once.

1-1-2. Presss [MUTE] again, and press [

Service mode displayed on TV screen

Items other than those enclosed by are default settings.

] on LCD TV.

VCTi version

Scaler version

15-inch TV

Item Default setting 3D Comb Filter 0 HDTV 1 PC Information 1 Speaker Outout 0 FLI2310 0 Country 2 Canadian Vchip 0 BS 0 Module Option 4

20-inch TV

Item Default setting 3D Comb Filter 1 HDTV 1 PC Information 1 Speaker Outout 1 FLI2310 0 Country 2 Canadian Vchip 0 BS 0 Module Option 0

- 7 -

2. Adjustment

Note: In this "Adjustment" section, [ ] shows a button.

2-1.Adjustment Tools and Conditions

Tools: Pattern Generator (801GF, MSPG925F) DDC Adjustment Tool PC Remote Control Conditions: Heat Run 30 minutes or more

2-2. Auto Gain/Offset Adjustment

2-2-1. RF Mode Adjustment (normal TV receive mode)

No reguired

2-2-2. Component Mode Adjustment

Preparation

Carry out Heat Run for 30 minutes or more before adjustment (with no RF signal).

1) Connect Y, Pb, and Pr output signals of Pattern Generator to the component jack (Y, Pb, Pr) of LCD TV.

2) Connect Y, Pb, and Pr output signals of Pattern Generator to the component jack (D Jack) of LCD TV.

3) Change the TV input mode to component mode.

4) Select 480p Mode (Y:100% Pb/Pr:75%) in Pattern Generator. Select Pattern 33 (Color Bar Pattern signal) in Pattern Generator (MSPG925F).

5) Go into service mode, and Auto Gain menu appears, and then press VOL [+].

6) Press [OK] to store the adjustment data.

(Adjustment in component mode or PC mode)

2-2-3. PC Mode Adjustment

Preparation

Carry out Heat Run for 30 minutes or more before adjustment (with no RF signal).

Connect Pattern Generator to the 15-pin D-Sub Jack of LCD TV.

1) Change the TV input mode to PC mode.

2) Set Pattern Generator to the following:

15DL15,15DL75: XGA (1024x768) 16-step or 11-step grayscale

20DL75 : VGA (640x480) 16-step grayscale

3) Go into service mode, and Auto Gain menu appears, and then press VOL [+].

4) Press [OK] to store the adjustment data.

- 8 -

4. TROUBLESHOOTING

Process A

No power

Ref.1/1-1

Check 15V or ST_ 5V

of Power B/D

Pass

Fail

Check short circuits of Main B/D or Change Power B/D

Check Output of

IC1004, IC1005(Main B/D)

Pass

Check IR Assy

Pass

Check P101 Connector

Check IC 1004, IC1005

Fail Fail

Fail

PIN 7 LEVEL(High 3.3V)

Pass

Change IC1004 , IC1005 or check short circuits of Main B/D

Change IR Assy

Change IC200 Of Main B/D

15V : P1100, #1, 2Ref.1 ST_5V : P1100, #6, 7Ref.1-1

- 33 -

Process B

No Raster on Component ,D2 Signal

Repeat Process A

Pass

Check

R217 of Main B/D

1.Component Jack (high)

2.D-JACK (LOW)

Pass

Ref.2

Check the Input/

Output of IC701 of Main B/D

Fail

Check short circuits of Main B/D & JACK B/D

Check R715 of Main

Level(high 3.3V)

Check short circuits of Main B/D

Fail

Ref.2

Pass

Ref.3

Check the input / output

IC500 of Main B/D

Pass

Check input source cable and jack

Component Y signal Input : IC701(Swiching IC), #3

Ref.3

Pass

Re-soldering or Change IC701

Fail

Component Y signal Input : IC500(Scaler IC), #147

Re-soldering or Change IC500

- 34 -

No Raster on PC Signal

Repeat Process A

Pass

Ref.4/4-1

Check the input/

output of IC701 of Main B/D

Fail

Check R715 of Main B/D

Level(LOW 0V)

Pass

Check short circuits of main B/D

Fail

Pass

Ref.5/5-1

Check the Input / Output

IC500 of Main B/D

Pass

Check input source cable and Jack

Ref.4

Ref.5

Re-soldering or Change IC701 of Main B/D

Fail

H Sync Input : IC701 (Swiching IC), #23

H Sync Input : IC500 (Scaler IC), #181

Ref.4-1

Ref.5-1

Re-soldering or Change IC500

V Sync Input : IC701 (Swiching IC), #13

V Sync Input : IC500 (Scaler IC), #182

- 35 -

No Raster on video Signall (Video1)

Repeat Process A

Pass

No Raster on TV(RF)

Signal

Check the output of

TU100

Fail

Check 5V, 33V of TU100 Re-soldering or Change the defect part

Check the input

source

Pass

Check R217 Level

(Video1,RF : HIGH 3.3v)

Pass

Ref.7

Check the Input/Output

of IC200

Pass

Check the Input/Output

of IC500

Pass

Fail

Pass

Fail

Check short circuits of Main B/D & JACK B/D

Ref.6

Check the Input/Output

of IC300

Check short circuits of Main B/D or Change IC500

Option

Fail

Only for 20DL75

Check short circuits of main B/D or Change the defect part

Check cable and Jack

Ref.6

Y separated Output : IC300 (Comb Filter), #96

- 36 -

Ref.7

ITU656 Clock Out : IC200(VCTI), #83

No Raster on video Signall (Video2 , S-video)

Repeat Process A

Pass

Check the input

source

Pass

Check R212 of Main B/D

1.Video2 : HIGH

2.s-video : LOW

Pass

Ref.8

Check the Input/Output

of IC200

Pass

Check the input/output

of IC500

Pass

Check short circuits of Main B/D

Fail

Fail Fail

Pass

Fail

& side B/D

Check short circuits of Main B/D & JACK B/D

Ref.9

Check the Input/Output

of IC300

Check short circuits of Main B/D or Change IC500

Only for 20DL75

Check short circuits of Main B/D or Change the defect part

Check cable and Jack

Ref.8

ITU656 Clock Out : IC200(VCTI), #83

- 37 -

Ref.9

Y separated Output : IC300 (Comb Filter), #96

No Sound (ALL MODE)

No Sound (Only VIDEO 1 or PC mode)

Check the input

source

Pass

Check the input/output

of IC200 of Main B/D

Pass

Ref.10

Check the input/output

of IC600 of Main B/D

Pass

Check the speaker

Fail

Change source Input

Pass

Re-soldering or Change IC200

Re-soldering or Change IC600

Change speaker

Check the R750 Level

Video1 : High

PC : Low

Pass

Check Input / Ouput

& 12V Of IC 702

Chang IC 702

Fail

Check short circuits of Main B/D

Fail

Check the speaker wire

Ref.10

Sound Input : IC600 (Audio AMP), #3, 5

Pass

- 38 -

5. EXPLODED VIEWS

15DL15,15DL75,20DL75

030

110

100

050

160

170

020

130

090

080

070

040

150

140

010

- 39 -

6. CHASSIS AND CABINET REPLACEMENT PARTS LIST

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “SERVICE SAFETY PRECAUTIONS” ON PAGE 3 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 SERVICE SAFETY PRECAUTIONS. Do not degrade the safety of the receiver through improper servicing.

NOTICE:

•

The part number must be used when ordering parts, in order to assist in processing, be sure to include the

Model number and Description.

•

The PC board assembly with ∗ mark is no longer available after the end of the production.

Model : 15DL15/15DL75/20DL75

Capacitors ............. CD : Ceramic Disk PF : Plastic Film EL : Electrolytic

Resistors ............... CF : Carbon Film CC : Carbon Composition MF : Metal Film

OMF : Oxide Metal Film VR : Variable Resistor FR : Fusible Resistor

(All CD and PF capacitors are ±5%, 50V and all resistors, ±5%, 1/6W unless otherwise noted.)

Location

No.

Parts No. Reference Description

#1:[15DL15] #2:[15DL75] #3:[20DL75]

CAPACITORS

C1 72795154 0CH6101K416 CERAMIC, 100PF 50V 5% NP0 201 C2 72795154 0CH6101K416 CERAMIC, 100PF 50V 5% NP0 201 C3 72795154 0CH6101K416 CERAMIC, 100PF 50V 5% NP0 201 C4 #1,#2 72795191 0CE107WF6DC ELECTROLYTIC, 100UF MVK 16V 20% R/ C6 72795155 0CH6102K406 CERAMIC CHIP, 1000PF 50V J SL 2012 C7 72795170 0CC471CK41A CERAMIC, 470PF 1608 50V 5% R/ C8 72795157 0CH6471K416 CERAMIC CHIP, 470F 50V J NP0 2012 C9 72795155 0CH6102K406 CERAMIC CHIP, 1000PF 50V J SL 2012 C10 72795161 0CH6331K416 CERAMIC CHIP, 330PF 50V J NP0 2012 C11 72795194 0CE226WJ6DC ELECTROLYTIC, 22UF MVK 35V 20% R/T C12 72795194 0CE226WJ6DC ELECTROLYTIC, 22UF MVK 35V 20% R/T C20 72795177 0CK104CK56A CERAMIC, 0.1UF 1608 50V 10% R C24 72795155 0CH6102K406 CERAMIC CHIP, 1000PF 50V J SL 2012 C53 72795163 0CC101CK41A CERAMIC, 100PF 1608 50V 5% R/ C66 72795163 0CC101CK41A CERAMIC, 100PF 1608 50V 5% R/ C100 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C101 72795172 0CH3104K566 CERAMIC, 0.1UF 50V 10% X7R 20 C102 72795177 0CK104CK56A CERAMIC, 0.1UF 1608 50V 10% R C103 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C104 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C105 72795185 0CK273DK51A CERAMIC, 27000PF 2012 50V 10% C106 72795169 0CC390DK41A CERAMIC, 39PF 2012 50V 5% NP0 C108 72795146 0CE108EF618 ELECTROLYTIC, 1000UF KMG 16V 20% F C109 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C110 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C111 72795171 0CH3103K516 CERAMIC, 10000PF 50V 10% B(Y5 C112 72795172 0CH3104K566 CERAMIC, 0.1UF 50V 10% X7R 20 C113 72795151 0CH3332K516 CERAMIC CHIP, 3300PF 50V K B 2012 C114 72795183 0CK225DH94A C115 72795177 0CK104CK56A CERAMIC, 0.1UF 1608 50V 10% R C116 72795166 0CC271CK41A CERAMIC, 270PF 1608 50V 5% R/ C117 72795188 0CK475DD57A CERAMIC, 4.7UF 2012 10V 10% X C118 72795193 0CE225WK6DC ELECTROLYTIC, 2.2UF MVK, RC 50V 20% C119 72795172 0CH3104K566 CERAMIC, 0.1UF 50V 10% X7R 20 C120 72795193 0CE225WK6DC ELECTROLYTIC, 2.2UF MVK, RC 50V 20% C121 72795177 0CK104CK56A CERAMIC, 0.1UF 1608 50V 10% R C150 72795148 0CH8106F691 ELECTROLYTIC, 10UF 16V 20% 105STD C151 72795148 0CH8106F691 ELECTROLYTIC, 10UF 16V 20% 105STD C152 72795148 0CH8106F691 ELECTROLYTIC, 10UF 16V 20% 105STD

CERAMIC, 2.2UF 2012 25V 80%, -

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