Toshiba 15DL15 Manuale utente
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SERVICE MANUAL
LCD Color Television
15DL15
15DL75
20DL75
FILE NO. 050-200513
Published in Japan, Sep. 2005 (YC)
TOSHIBA CORPORATION 2005
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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
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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
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.
* Physical damage means major damage to a home, furnishings and other possessions.
Examples of marks
SHOCK HAZARD
PROHIBIT DISASSEM-
BLING
UNPULUG
The
"
indicates caution (including danger and warning).
The actual meaning of this caution is indicated inside the
"
or nearby illustrations or text.
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 or nearby illustrations or text.
The example shown to the left indicates that disassembly is forbidden.
The
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indicates a forced action (an action that must be performed).
The actual meaning of this forced action is indicated by
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or nearby illustrations or text.
The example shown to the left indicates that the power plug must be disconnected.
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WARNING
KEEP CHILDREN
AWAY
UNPULUG
SHOCK HAZARD
USE SPECIFIED
PARTS
CAUTION FOR
WIRING
CAUTION FOR
ASSEMBLING /
WIRING
CHECK INSULATION
RESISTANCE
PROHIBIT
REMODELING
• 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 pos-
sible 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 character-
istics.
Use only the specified parts when the mark is included in a circuit diagram or parts list.
• 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 recon-
nect 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.
• 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 1or 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
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HANDLING THE LCD MODULE
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 wa-
ter. 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
The LCD module can easily be damaged during disassembly
or reassembly; therefore, always observe the following pre-
cautions when handling the module.
1. When attaching the LCD module to the LCD cover, posi-
tion it appropriately and fasten 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 mod-
ule because any impact can adversely affect the perform-
ance. Also use caution when handling the polarized screen
because it can easily be damaged.
CAUTION The metal edges of the LCD module
are sharp, handle it with care.
3. If the panel surface becomes soiled, wipe with cotton or
a
soft cloth. If this does not remove the soiling, breathe o
n
the surface and then wipe again.
If the panel surface is extremely solied, use a CRT cleane
r
as a cleaner.Wipe off the panel surface by drop the cleane
r
on the cloth. Do not drop the cleaner on the panel. Pa
y
attention not to scratch the panel surface.
4. Leaving water or other fluids on the panel screen for a
n
extended period of time can result in discoloration o
r
stripes. Immediately remove any type of fluid from th
e
screen.
5. Glass is used in the panel, so do not drop or strike wit
h
hard objects. Such actions can damage the panel.
6. CMOS-LSI circuitry is used in the LCD module, so avoi
d
damage due to static electricity. When handling the mod
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ule, use a wrist ground or anchor ground.
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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 con-
ditions 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.
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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 [ ] on LCD TV.
Service mode displayed on TV screen
VCTi version
Items other than those enclosed by are default
settings.
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
Scaler version
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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.
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.
(Adjustment in component mode or PC mode)
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2-3. DDC EDID Data Read & Write
The following software programs are used to read/write DDC EDID data.
DLPortIO.exe
t15.edi
t20.edi
UserPort.exe
UserPort.sys
J(Windows/system32/Drivers)
WinEDID_2.0.exe
Be very careful that DDC EDID data read/write varies depending on Operating System conditions of
PC.
(See the flowchart below.)
Start
OS: MS Windows 2000, XP
OS: MS Windows 98
Port Setup: (2-3-1)
Preparation EDID Reading & Writing: (2-3-2)
EDID Read: (2-3-3)
EDID Write: (2-3-4)
Confirmation of Updated EDID Data: (2-3-5)
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2-3-1. Port Setup (Windows 2000, XP only)
1) Copy "UserPort.sys" file to c:\windows\system32\drivers.
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