Toshiba 32LV67U Schematic

SERVICE MANUAL

(*1), as indicated by the underlined serial number.

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LCD Color Television

32LV67U

Ver. 1.00

This model is classified as a green product
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

SOLDER

© TOSHIBA CORPORATION

.

GREEN PRODUCT PROCUREMENT

and

LEAD-FREE

GREEN PRODUCT PROCUREMENT

Corporation recognizes environmental protection as a key management tasks, and is doing its

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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

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

free solder must

free solder may result in damage to the component and or PCB being

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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. Lead­be 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 lead­soldered. 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.

IMPORTANT NOTICE

Through WEB, ver. 6.5 has been released but with it, the linking function in this manual may

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A Known Malfunction

Autodesk® DWF™ Viewer version
(Free software provided through WEB)

Use Autodesk DWF Viewer ver. 6.0.

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.

IMPORTANT NOTICE

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User Guide

Autodesk® DWF™ Viewer

this system. Please download and install.

When
function and this sample may not work. In that case, perform the Internet Explorer setting
using the following procedure to restore normal operation.

Windows XP SP2

1. Windows version check
[My Computer (right-click)] - [Properties]

is necessary to view drawings and to activate the functions of

is used, pop-up windows are limited by the enhanced security

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

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Operating Environment

PC : Pentium III or higher recommended
Monitor : 1024 x 768 or higher resolution recommended

Mouse : A mouse with wheel recommended

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OS : Microsoft Windows 2000/XP
Browser : Microsoft Internet Explorer 6.0 or later
Drawing viewer : Autodesk DWF Viewer 6.0

* Use the software following respective license terms and conditions.

Note:

In case of using this service manual with network connection, allocate its folder to the client
PCs as

network drive

to avoid any possible malfunction.

Or in case of accessing it 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.

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 list. 

Parts Search Function

You can search any part within the displayed drawing or within the whole schematic
diagram/board view by 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 choose a desired drawing to display. 

Layer Display Changing Function

When a pattern on a board view is clicked, it is highlighted in green. This allows easy pattern

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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

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). 

IMPORTANT NOTICE

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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.

ADJUSTMENT

While holding the MUTE button, press MENU

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Service Mode

Entering to Service Mode

1. Set VOLUME to minimum and press MUTE
button twice on Control.

↓

↓

Service Mode display

2. Press MUTE button again and hold button
down.

3.
button on TV set.

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Key Function in the Service Mode

The following key entry during display of adjustment menu provides special functions.

Selection of the adjustment items CH (on TV or remote control)
Change of the data value Volume +/- (on TV or remote control)
Adjustment menu mode ON/OFF MENU button (on remote control)
Reset the count of operating

protect circuit to "00"
"RCUT" selection 1 button
"GCUT" selection 2 button
"BCUT" selection 3 button
"CNTX" selection 4 button
"COLC" selection 5 button
"UVTT" selection 6 button
Self diagnostic display ON/OFF 9 button

CALL + CH button on TV ( )

Selecting the Adjusting Item

Every pressing of CH button in the service mode changes the adjustment items in the
order of table below. ( button for reverse order)

SETTING & ADJUSTING DATA
[ SERVICE MODE ]

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Note:

(1) The image system data may be different for each image format chosen. The factory

preset data value is indicated in the table.

(a) HOST-MICRO EEPROM data

Prior to changing any board containing an EEPROM IC, the exisiting data in each image

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DRAMA0543 for LV series
(b) TV-MICRO EEPROM data
DRAMA0542 for LV series

(2)

format should be copied down as a precautionary measure.

Item Name of adjustment

R-CUT R CUTOFF 00H (a)
G-CUT G CUTOFF 00H (a)
B-CUT B CUTOFF 00H (a)
R-DRV R DRIVE 64H (a)

G-DRV G DRIVE 64H (a)

B-DRV B DRIVE 64H (a)
*BRTC BRIGHTNESS CENTER 78H (a)
*COLC COLOR CENTER C0H (a)
*UVTT BASE BAND TINT 80H (a)
*CNTX CONTRAST MAX FFH (a)

SHRC SHARPNESS CENTER 60H (a)

VBIS VBI Setting 64H (a)

Data

LV series

CC Closed Caption 64H (a)
ID1 VBID 64H (a)
GG Gemstar 00H (a)

BYBK B-Y OFF SET 00H (a)

RYBK R-Y OFF SET 00H (a)

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OPT1 TV SET OPTION 1 00H (b)
OPT2 TV SET OPTION 2 25H (b)
OPT3 TV SET OPTION 3 00H (b)
OPT4 TV SET OPTION 4 25H (b)
OPT5 TV SET OPTION 5 00H (b)

SET-ID MODEL ID *1 (b)

MAGC AGC of MTS decoder 00H (b)

VO1 Volume1 Data 5FH (b)

V25 Volume25 Data ADH (b)
V50 Volume50 Data DFH (b)
V75 Volume75 Data F9H (b)

V100 Volume100 Data FFH (b)
VOLBS Correction Volume at DTV 00H (b)
VOLST Correction Volume at Stereo/SAP of ATV 00H (b)

EVOL Reduce Volume For Bassboost (Nonuse) 00H (b)
VOLX Volume Limiter For Hotel 64H (b)
BASX Bass Max Data 1AH (b)
TREX Treble Max Data 1AH (b)
TONN Tone Min Data 08H (b)
BASC Bass center Data FEH (b)
TREC Treble center Data 00H (b)
EBAS Add Bass on FOCUS 04H (b)
ETRE Add Treble on FOCUS FEH (b)

WON2 Bass Reducer 10H (b)

ALS ALS point 00H (b)
ALOF Reduce in ALL (wow, TruSurround) off 01H (b)
VSTB Reduce Volume For Stable Sound 00H (b)
VS3D Reduce Volume For SRS3D 01H (b)

VFCS Reduce Volume For FOCUS 03H (b)
VTBH Reduce Volume For TruBass High FFH (b)

VTBL Reduce Volume For TruBass Low FFH (b)

button will change the value of data in the range from 00H to

ID data according to panel

VVDD Reduce Volume For Dolby F3H (b)

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WFCS FOCUS Level 01H (b)

WWSP SRS 3D Level 02H (b)

WTBH TruBass High Level 03H (b)

WTBL TruBass Low Level 02H (b)

VOLM Volume coefficient at 1/2 Mute 32H (b)

Factory preset data will be loaded after setting Model ID data.

Note:

(*1) SET-ID data is subject to the models.

Refer to Setting Panel Option Data and SET-ID Data for detail.

Adjusting the Data

Pressing of VOLUME or
FFH. The variable range depends on the adjusting item.

Setting Panel Option Data and SET-ID Data

1. Panel option data is subject to OP4 and OP5.
Enter to service mode and select menu of OP4 or OP5 by pressing P or P during

Display of adjustment menu. After selecting OPT4 or OPT5, press + or - to set
OPT4 or OPT5 value as table below.

2. Whenever using new signal board to the set, setting the SET­option data.

Set Size Panel Maker OPT4 OPT3 OPT5 SET-ID

LV67U 32 SAMSUNG 65h 00h 00h A1h
LV37U 32 SAMSUNG 65h 00h 00h A1h
LV17U 32 SAMSUNG 65h 00h 00h A1h

Exit from Service Mode

Pressing POWER button to turn off the TV once.

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Self Diagnostic Function

1. Press "Recall" button on Remote Control during display of adjustment menu in the
service mode. This will bring up the "S" in the right corner of screen. Now press "9"
button on remote.
The diagnosis will begin to check if interface among IC's is executed properly.

2. During diagnosis, the following displays are shown.

(1) Version information of TV-MICRO : Display 1 byte data.
(2) Version information of TV-MICRO EEPROP : Display 1 byte data.
(3) Version information of DVD MPU : LV series
(4) Revision of image file : LCD Model not used.
(5) Total brightness hour of TV. : Display 4 bytes data.
(6) Operation hour of TV in LOW mode : Display 4 bytes data.
(7) Operation hour of TV in HIGH BRIGHT mode : LCD Model not used.
(8) Number of times of TV ON/OFF. : LCD Model not used.
(9) Temperature display of thermo-Sensor. (DMD) : LCD Model not used.

(10) Temperature display of thermo-Sensor. (LAMP) : LCD Model not used.

(11) DMD Engine System status : LCD Model not used.

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(12) TV-MICRO System status : Not used
(13) IIC-BUS status

Bus line normal is "None" displayed.
When it is abnormal, the block name is displayed as follows.
"SCL-GND" (Red indication) : SCL-GND short circuit
"SDA-GND" (Red indication) : SDA-GND short circuit
"SCL-SDA" (Red indication) : SCL-SDA short circuit
"NG : MTS"
"NG : APRO"
"NG : AVSW"

LED Indication

The yellow, blue and red/green LED lights on the TV (at the bottom center of the TV)
indicate the TV's status, as described below:

Note:

If the TV loses A/C power (e.g., a power outage occurs or the power cord is
unplugged), when power is restored, the yellow LED will blink while the TV is booting until
the remote control is usable. This is normal and is not a sign of malfunction.

LED Indication Condition

1 Green and Yellow are off. Power supply OFF. (AC)

2 Green and Yellow are off. Power supply OFF. (Stand by)
3 Green is on (solid). The TV is operating properly.
4 Yellow is on (solid). A disk is in the disk slot.

5 Green blinks Fan stop detection.

6 Green blinks slowly. Abnormal operation of BUS line.

Turn the TV off and unplug the power cord, then plug the

power cord in again and turn the TV on.

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7 Green blinks quickly. Power Protection Detection.

Turn the TV off and unplug the power cord, then plug the
power cord in again and turn the TV on.

8 Yellew blinks 3 times. The TV is rebooting.

Wait several seconds until the yellow LED stops blinking.

9 Green is on (solid).

Yellow is on (solid).

10 Green is on (solid).

Yellow is off.

11 Green is off.

Yellow is on (solid).

Upgrading in progress.

Upgrading succesful.

Upgrading failed.

FUNCTION AND OPERATION

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TV Front and Side Panel Control and Connection

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FUNCTION AND OPERATION

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Learning about the Remote Control

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FUNCTION AND OPERATION

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Programming Channel into the TV's Channel Memory

Programming Channel Automatically

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Manually Adding and Deleting Channel in the Channel Memory

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SAFETY INSTRUCTION

should enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the

When attaching the LCD module to the LCD cover, position it appropriately and fasten

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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

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.
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.

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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

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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.