Toshiba 32LV703R Schematic

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SERVICE MANUAL

LCD COLOR TELEVISION

32LV703R

Ver. 2.00

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.

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.

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.

download and install.

Internet Explorer Settings

When Windows XP SP2 or Windows Vista is used, ActiveX control and pop-up windows are li the enhanced security function and this system may not work. In that case, perform the Internet Explo setting using the following procedure to restore normal operation.

1.Windows version check

[My Computer (right-click)] - [Properties]

2.Internet Explorer setting [Tools] - [Internet Options]

for Internet Explorer 7

for Windows Vista

Operating Environment

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.

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 locat You can get any parts information immediately on the screen without referring to the maintenance pa

Parts Search Function

You can search any part within the displayed drawing or within the whole schematic diagram/board v specifying a location number. The pop-up window displayed by clicking a part 's character string allo 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 t signal is searched and the display changes to the destination. Connecter destinations can also be searc the same way.

When two or more search results are provided, their drawing names are displayed, allowing you to ch desired drawing to display.

Layer Display Changing Function

When any of the color buttons on the toolbar is clicked, it can be selected to display desired layer in i or not to display each layer. This allows you to see the pattern layer only by setting other layers to "n 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 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 e 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 M Ver.2 to be stored in the server.

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 Manual and ZEUS Engine program into those applicable to the network use.

1.Whenever changing the file-path of both ZEUS Engine Program and ZEUS Service Manual to network, pay the attention to set the "Exchange to" column that should have a proper relation b 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 Eng 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).

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 pr "START".

(This procedure is one time only)

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", a 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 lef bottom corner on the screen whenever searching the location links. This is not malfunction.

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.

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.

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.

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.

WARNING: This product is manufactured using lead free solder.

DO NOT USE LEAD BASED SOLDER TO REPAIR 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.

SAFETY INSTRUCTION

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.

Safety Precaution

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.

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 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.)

Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer for this check.

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

Resistance values in orms (Ω).

V:Voltmeter or oscilloscope (r.m.s. or peak reading)

Input resistance : 1 MΩ

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).

The potential at any point (TOUCH CURRENT) expressed as voltage and does not exceed the following value:

The part or contact of a TERMINAL is not HAZARDOUS LIVE if:

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

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.

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.

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

CAUTION: The metal edges of the LCD module are sharp, handle it with

care.

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.

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.

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.

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

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

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+24V Diming BL_ON

Power BD

+5V +12V ACD

PS_ON

Diming

BL_ON

Panel

LVDS out

Main BD

HDMI 1

HDMI 2

HDMI 3 (Side)

VGA

Phone Jack

Component

+L/Mono-R

SCART 1

SCART 2

Tuner

AV+L/Mono-

R (Side)

Phone Jack

(Side)

HDMI Switch

DDR Bus

SPI Bus

R/G/B/H/V/DDC Bus

VGA & HDMI 1 Audio Input

YPbPr + Audio Input

LVDS Output

MST9B884J

SCART R/G/B, AV, SV, Audio Input & TV Out

SCART Audio Out

AMP

I2S Bus

Audio Out

DRV602

SCART Audio Out

SCART AV, SV, Audio Input & TV Out

SAW

VIF / SIF Input

Filter

CVBS + Audio Input

AMP

Head Phone Out

TPA6132

USB (Side)

F/W Upgrade, JPEG Viewer and MP3

Player

DDR 16MB

SPI Flash

2MB

NVRAM

PANEL

Audio AMP

Keypad

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SCHEMATIC DIAGRAM

Precaution

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION" FOR DIRECT VIEW CTV ONLY, "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE" 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 SAFETY PRECAUTION and PRODUCT SAFETY NOTICE.

Do not degrade the safety of the receiver through improper servicing.

Note:

1.RESISTOR

Resistance is shown in ohm [K=1,000, M=1,000,000]. All resistors are 1/6 W and 5 % tolerance carbon resistor, unless otherwise noted as the following marks.

1/2R : Metal or Metal oxide of 1/2 watt 1/2S : Carbon composition of 1/2 watt 1RF : Fuse resistor of 1 watt

10 W : Cement of 10 watt K : ±10 %

G: ±2 %

F: ±1 %

2.CAPACITOR

Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in µF, and the values more than 1 in pF.

All capacitors are ceramic 50 V, unless otherwise noted as the following marks.

= Electrolytic capacitor = Mylar capacitor

3.The parts indicated with "" have special characteristics, and should be replaced with identical parts only.

4.Voltages read with DIGITAL MULTI-METER from point indicated to chassis ground, using a color bar signal with all controls at normal, line voltage at nominal AC volts.

5.Waveforms are taken receiving color bar signal with enough sensitivity.

6.Voltage reading shown are nominal values and may vary ±20 % except H.V.

+5V_SW

VGA5V

FB1001

120OHM/100MHZ

PC_AU_INL

R1125

10KOHM

AUL5

D1001

PHONE_JACK_3P

NP_NC2

C1015

C1003

BAT54C

470PF/50V

22PF/50V

NP_NC1

D1003

FB1002

120OHM/100MHZ

VGA_5V

PC_AU INR

R1127

10KOHM

D1002

AUR5

C1001

0.1UF/16V

CN1001

ADUC10S03005

12KOHM R1128

12KOHM R1126

C1016

C1006

R1007

R1008

470PF/50V

22PF/50V

U1001

4.7KOHM 4.7KOHM

VCC

R1006 10KOHM

WC#

R1011

10OHM

DDC_DSUB_WP

SCL

R1010

10OHM

VSS

SDA

C1009

C1008

M24C02_WMN6TP

ADUC10S03005

VGA PHONE JACK

33PF/50V

ISP2_SDA

ISP2_SCL

CN1002

FB1003

30OHM/100MHZ

R1013

47OHM

C1010

47NF/25V

DSUB_11

RIN+

FB1004

30OHM/100MHZ

R1014

47OHM

C1011

47NF/25V

DDCSDA

GIN+

FB1005 30OHM/100MHZ

R1015

47OHM

C1012

47NF/25V

75OHM

C1017

C1018

C1019

BIN+

R1018

470OHM C1013

1000PF/50V

DSUB_4

SOG

FB1006

VGA5V

DDCSCL

R1016

ZD1001

C1021

ZD1002

C1020

ZD1003

10PF/50V

R1017

10PF/50V

R1019

10PF/50V

120OHM/100MHZ

CLOSE TO IC

D_SUB_15P3R

DSUB_11

C1014

NC 10PF/50V

ADUC10S03005

0.1UF/16V

DSUB_4

R1024

100OHM

HS_RGB

R1026

100OHM

VS_RGB

ZD1004

ZD1005

R1027

C1022

R1028

C1023

ZD1006

PESD0603-240

ADUC10S03005

2.2KOHM

ADUC10S03005

2.2KOHM

NC 10PF/50V

ZD1007

PESD0603-240

NC 10PF/50V

ZD1008

PESD0603-240

CLOSE TO CONNECTOR

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