Toshiba 37XV505D User manual

SERVICE MANUAL
LCD Color Television
37XV505D
Ver. 2.01
This model is classified as a green product (*1), as indicated by the underlined serial number. This
Service Manual describes replacement parts for the green product. When repairing this green
product, use the part(s) described in this manual and lead-free solder (*2).
For (*1) and (*2), refer to GREEN PRODUCT PROCUREMENT and LEAD-FREE SOLDER.
© TOSHIBA CORPORATION
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IMPORTANT NOTICE
WARNING:
You are requested that you shall not modify or alter the information or data
provided herein without prior written consent by Toshiba. Toshiba shall not be
liable to anybody for any damages, losses, expenses or costs, if any, incurred in
connection with or as a result of such modification or alteration.
THE INFORMATION OR DATA HEREIN SHALL BE PROVIDED "AS IS" WITHOUT
ANY WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED WARRANTY OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Toshiba shall not be liable for any damages, losses, expenses or costs, if any,
incurred in connection with or as a result of use of any information or data
provided herein.
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IMPORTANT NOTICE
User's Guide
Contents:
Install Autodesk DWF Viewer
Internet Explorer Settings
Operating Environment
Functions Provided on Each Drawing Page
Using with Network
Install Autodesk DWF Viewer
Autodesk DWF Viewer
is necessary to view drawings and to activate the functions of this system. Please
download and install.
Internet Explorer Settings
When Windows XP SP2 or Windows Vista is used, ActiveX control and pop-
up windows are limited by
the enhanced security function and this system may not work. In that case, perform the Internet Explorer
setting using the following procedure to restore normal operation.
1. Windows version check
[My Computer (right-click)] - [Properties]
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2. Internet Explorer setting
[Tools] - [Internet Options]
for Internet Explorer 7
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for Windows Vista
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Operating Environment
Functions Provided on Each Drawing Page
Parts Information Reference Function
When the character string of a part on the drawing is clicked, its information is popped up at the location.
You can get any parts information immediately on the screen without referring to the maintenance parts

Parts Search Function
You can search any part within the displayed drawing or within the whole schematic diagram/board view
specifying a location number. The pop-
up window displayed by clicking a part 's character string allows to
search the part within the applicable schematic diagram, board view or spare parts list. 
A circle appears when the part is found, showing the part's location within the drawing. 
Signal Line/Connector Destination Display Function
When a name at the end of a signal line in a divided schematic diagram is clicked, the destination of the
signal is searched and the display changes to the destination. Connecter destinations can also be searched in
the same way. 
When two or more search results are provided, their drawing names are displayed, allowing you to choos
desired drawing to display. 
PC : Pentium III or higher recommended
Monitor : 1024 x 768 or higher resolution recommended
Mouse : A mouse with wheel recommended
OS : Microsoft Windows 2000 SP4 / XP / Vista
Browser : Microsoft Internet Explorer 6.0 / 7.0
Drawing viewer : Autodesk DWF Viewer 6.0 / 7.0
* Use the software following respective license terms and conditions.
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Layer Display Changing Function
When any of the color buttons on the toolbar is clicked, it can be selected to display desired layer in its color
or not to display each layer. This allows you to see the pattern layer only by setting other layers to "non
display". 
PC Board View Pattern Highlighting Function
When a pattern on a board view is clicked, it is highlighted in green. This allows easy pattern tracing.
Specified Area Printing Function
The Autodesk DWF Viewer enables to print the displayed drawing region as it is on a printer. It also allows
to print a large-sized drawing in multiple pieces (tile printing). 
Using with Network
PRECAUTION
To use ZEUS Service Manual Ver.2 with network, the file-
path names written on the source files of each
ZEUS Engine Program Ver.2 and ZEUS Service Manual Ver.2 are to be modified.
Perform the procedure described below.
Preparation
1. Run the program file zuesFPch.exe to install the program file for File-Path to the Local PC.
-> Download zeusFPch_setup.zip (2.3MB)
2. Run the program file ZeusSetup_v2.0.exe to install the ZEUS Engine Program in C:\Program
Files\zeus of the local PC. This can be done by running the installer program provided.
3.
Create the appropriate folder where the ZEUS Engine Program Ver.2 and the ZEUS Service Manual
Ver.2 to be stored in the server.
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4. Move the ZEUS Engine Program of step 2 to the folder created at step 3 in the Server.
5. Detach the ZEUS Service Manual Ver.2 to the folder created at step 3 in the Server.
6. Unzip the ZEUS Service Manual Ver.2 within the folder in the Server.
Example of folder
Procedure of File-Path
The zeusFPch is the exclusive program to exchange the file-
path names written in both source files of ZEUS
Manual and ZEUS Engine program into those applicable to the network use.
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1. Whenever changing the file-
path of both ZEUS Engine Program and ZEUS Service Manual to use with
network, pay the attention to set the "Exchange to" column that should have a proper relation between
ZEUS Engine Program and ZEUS Service Manual with referring the following.
Run the zeusFPch and set "Exchange to" by referring to the examples below.
Example 1 :
In the "Exchange to" column shows the relation between ZEUS Service Manual and ZEUS Engine
Program.
../ counts the relation between.
Thus in this case, it must be ../../zeus/ (2 counts).
Example 2 :
In this case, it must be ../../../zeus/ (3 counts).
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2. Run the zeusFPch to change the path in the ZEUS Engine Program Ver.2.
3.
Set ZEUS Engine Program in the created folder in the server to the "Target Folder", and then press
"START".
(This procedure is one time only)
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4. Run the ZeusFPch to change the path in the ZEUS Service Manual Ver2.
5.
Set unzipped ZEUS Service Manual in the created folder in the server to the "Target Folder", and then
press "START".
(This procedure is required whenever placing service manual.)
Confirmation
Confirm that service manual on the server can be operated normally by client PC.
Note:
In case of accessing the ZEUS Manual through WEB site, the small pop-
up window appears at the left
bottom corner on the screen whenever searching the location links. This is not malfunction.
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IMPORTANT NOTICE
A Known Malfunction
Autodesk® DWF™ Viewer version
(Free software provided through WEB)
Use Autodesk DWF Viewer ver. 6.0.
Through WEB, ver. 6.5 has been released but with it, the linking function in this manual may not
work properly.
If ver. 6.5 has been installed, uninstall it and reinstall ver. 6.0.
To get ver. 6.0, click the icon, or contact to the nearest Toshiba Service Centre for further assistance.
Freezing windows opened
(Cannot close the open windows)
This may happen occasionally.
In case of encountering this, follow the procedure below.
1. Press [Ctrl], [Alt] and [Delete] keys at the same time to engage windows security windows.
2. Then, choose TASK manager and Application tab, and select TOSHIBA SERVICE
MANUAL-Microsoft Internet Explorer.
3. Click TASK-end.
Main Window back forwarded
The real cause has not been found yet but with this condition, nothing disturbs the service manual
operation.
Continue to use by operating the windows.
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Precaution when opening the diagrams
While opening the diagrams, the menu in the left frame changes its color to GRAY. This is an
indication that the viewer is processing.
With this condition, the menu indication color may stick to the GRAY color or Windows may freeze
if clicking other menu.
To avoid such things, do not operate any others while menu turns GRAY color.
If entering this, re-open the service manual or refresh the left frame.
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GREEN PRODUCT PROCUREMENT
The EC is actively promoting the WEEE & RoHS Directives that define standards for recycling and
reuse of Waste Electrical and Electronic Equipment and for the Restriction of the use of certain
Hazardous Substances. From July 1, 2006, the RoHS Directive will prohibit any marketing of new
products containing the restricted substances.
Increasing attention is given to issues related to the global environmental. Toshiba Corporation
recognizes environmental protection as a key management tasks, and is doing its utmost to enhance
and improve the quality and scope of its environmental activities. In line with this, Toshiba
proactively promotes Green Procurement, and seeks to purchase and use products, parts and
materials that have low environmental impacts.
Green procurement of parts is not only confined to manufacture. The same green parts used in
manufacture must also be used as replacement parts.
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LEAD-FREE SOLDER
This product is manufactured using lead-free solder as a part of a movement within the consumer
products industry at large to be environmentally responsible. Lead-free solder must be used in the
servicing and repair of this product.
The melting temperature of lead-free solder is higher than that of leaded solder by 86ºF to 104ºF
(30ºC to 40ºC). Use of a soldering iron designed for lead-based solders to repair product made with
lead-free solder may result in damage to the component and or PCB being soldered. Great care
should be made to ensure high-quality soldering when servicing this product especially when
soldering large components, through-hole pins, and on PCBs as the level of heat required to melt
lead-free solder is high.
WARNING: This product is manufactured using lead free solder.
DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT!
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LEAD
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FREE SOLDER
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SAFETY INSTRUCTION
Safety Precaution
1. An isolation transformer should be connected in the power line between the receiver and the
AC line before any service is performed on the receiver.
2. Always disconnect the power plug before any disassembling of the product. It may result in
electrical shock.
3.
When replacing a chassis in the cabinet, always be certain that all the protective devices are put
back in place, such as nonmetallic control knobs, insulating covers, shields, isolation resistor-
capacitor network, etc.
4. Always keep tools, components of the product, etc away from the children, These items may
cause injury to children.
5. Depending on the model, use an isolation transformer or wear suitable 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.
6. Always use the replacement parts specified for the particular model when making repairs. The
parts used in products require special safety characteristics such as inflammability, voltage
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY
PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.
WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE UNFAMILIAR
WITH THE NECESSARY PRECAUTIONS ON THIS RECEIVER. THE FOLLOWING
ARE THE NECESSARY PRECAUTIONS TO BE OBSERVED BEFORE SERVICING
THIS CHASSIS.
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resistance, etc. therefore, use only replacement parts that have these same characteristics. Use
only the specified parts when the mark is indicated in the circuit diagram or parts list.
7. Parts mounting and routing dressing of wirings should be the same as that used originally. For
safety purposes, insulating materials such as isolation tube or tape are sometimes used and
printed circuit boards are sometimes mounted floating. Also make sure that wirings is routed
and clamped to avoid parts that generate heat and which use high voltage. Always follow the
manufactured wiring routes / dressings.
8. Always ensure that all internal wirings are in accordance before re-assembling the external
casing after a repairing completed. 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.
9. NEVER remodel the product in any way. Remodeling can result in improper operation,
malfunction, or electrical leakage and flame, which may be hazardous.
10. Touch current check. (After completing the work, measure touch current to prevent an electric
shock.)
z
Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer for this
check.
z
Connect a measuring network for touch currents between each exposed metallic part on the
set and a good earth ground such as a water pipe.
Annex D
(normative)
Measuring network for TOUCH CURRENTS
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z
The potential at any point (TOUCH CURRENT) expressed as voltage and does not
exceed the following value:
Resistance values in orms (ȍ).
Input resistance : 1 Mȍ
Input capacitance : 200 pF
Frequency range : 15 Hz to 1 MHz and d.c. respectively
Note: Appropriate measures should be taken to obtain the correct value in case of non sinusoidal
waveforms.
The measuring instrument is calibrated by comparing the frequency factor of with the solid line in
figure F.2 of IEC 60990 at various frequencies. A calibration curve is constructed showing the
deviation of from the ideal curve as a function of frequency.
TOUCH CURRENT = /500 (peak value).
V:
Voltmeter or oscilloscope
(r.m.s. or peak reading)
The part or contact of a TERMINAL is not HAZARDOUS LIVE if:
Note: The limit values of = 0.35 V (peak) for a.c. and = 1.0 V for d.c. correspond to the values
0.7 mA (peak) a.c. and 2.0 mA d.c.
a) The open-circuit voltage should not exceed 35 V (peak) a.c. or 60 V d.c. or, if a) is not met.
b) The measurement of the TOUCH CURRENT
shall be carried out in accordance with IEC 60990,
with the measuring network described in
Annex D of this standard.
The TOUCH CURRENT expressed as voltages and , does not exceed the following
values:
- for a.c. : = 35 V (peak) and = 0.35 V (peak);
- for d.c. : = 1.0 V
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Product Safety Notice
Many electrical and mechanical parts in this chassis have special safety-
related characteristics. These
characteristics are often passed unnoticed by a visual inspection and the protection afforded by them
cannot necessarily be obtained by using replacement components rated for higher voltage, wattage,
etc. Replacement parts which have these special safety characteristics are identified in this manual
and its supplements; electrical components having such features are identified by the international
hazard symbols on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the
parts list may create electrical shock, fire, or other hazards.
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SAFETY INSTRUCTION
Handling the LCD Module
Safety Precaution
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
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.
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.
CAUTION: The metal edges of the LCD module are sharp, handle it with care.
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