Toshiba 32WL58A.pdf

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FILE NO. 060-200511
SERVICE MANUAL
LCD Color Television
32WL58A
32WL58E
32WL58R
32WL58T
TOSHIBA CORPORATION 2005
Published in Japan Sep. 2005 (YC)
TABLE OF CONTENTS
SERVICE SAFETY PRECAUTIONS .................................................................................................................................... 3
HANDLING THE LCD MODULE .......................................................................................................................................... 5
SERVICE MODE .................................................................................................................................................................. 7
LOCATION OF CONTROLS ............................................................................................................................................... 12
LAYOUT OF MAJOR BOARDS .......................................................................................................................................... 14
MECHANICAL DISASSEMBLY .......................................................................................................................................... 15
EXPLODED VIEW .............................................................................................................................................................. 17
PACKING DISASSEMBLY ................................................................................................................................................. 19
CHASSIS AND CABINET REPLACEMENT PARTS LIST ................................................................................................. 20
PC BOARDS TOP & BOTTOM VIEW ................................................................................................................................ 29
CIRCUIT BLOCK DIAGRAM .............................................................................................................................................. 46
SPECIFICATIONS ............................................................................................................................................................. 50
APPENDIX:
SCHEMATIC DIAGRAM
–2–
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
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".
SHOCK HAZARD
PROHIBIT DISASSEM-
BLING
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.
UNPLUG
The
-
indicates a forced action (an action that must be performed).
The actual meaning of this forced action is indicated by
-
or nearby illustrations or text.
The example shown to the left indicates that the power plug must be disconnected.
–3–
SPECIFIC INFORMATIONS
GENERAL ADJUSTMENTS
WARNING
• Always advise users to keep children away.
There is danger of injury to children from tools, disassembled products, etc.
KEEP CHILDREN
AWAY
• 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.
UNPLUG
• 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 4M 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
SHOCK HAZARD
USE SPECIFIED
PARTS
CAUTION FOR
WIRING
CAUTION FOR
ASSEMBLING /
WIRING
CHECK INSULATION
RESISTANCE
PROHIBIT
REMODELING
–4–
HANDLING THE LCD MODULE
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.
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.
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.
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.
5. Glass is used in the panel, so do not drop or strike with
hard objects. Such actions can damage the panel.
CAUTION
The metal edges of the LCD module
are sharp, so use caution to avoid in-
jury.
6. CMOS-LSI circuitry is used in the LCD module, so avoid
damage due to static electricity. When handling the mod-
ule, use a wrist ground or anchor ground.
–5–
SPECIFIC INFORMATIONS
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.
GENERAL ADJUSTMENTS
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.

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