Toshiba 32LV67U - 32" LCD TV User manual

SERVICE MANUAL
LCD Color Television
32LV67U
Ver. 1.00
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.
© TOSHIBA CORPORATION
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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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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.
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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.
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IMPORTANT NOTICE
User Guide
Autodesk® DWF™ Viewer is necessary to view drawings and to activate the functions of
this system. Please download and install.
When Windows XP SP2 is used, pop-up windows are limited by the enhanced security
function and this sample 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]
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
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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. 
Mouse : A mouse with wheel recommended
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.
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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). 
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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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ADJUSTMENT
Service Mode
Entering to Service Mode
1. Set VOLUME to minimum and press MUTE
button twice on Control.
↓
2. Press MUTE button again and hold button
down.
↓
Service Mode display
3.
While holding the MUTE button, press MENU
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.
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:
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" CALL + CH button on TV ( )
"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
(1) The image system data may be different for each image format chosen. The factory
preset data value is indicated in the table.
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(a) HOST-MICRO EEPROM data
DRAMA0543 for LV series
(b) TV-MICRO EEPROM data
DRAMA0542 for LV series
(2)
Prior to changing any board containing an EEPROM IC, the exisiting data in each image
format should be copied down as a precautionary measure.
Item Name of adjustment Data
LV series
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)
CC Closed Caption 64H (a)
ID1 VBID 64H (a)
GG Gemstar 00H (a)
BYBK B-Y OFF SET 00H (a)
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RYBK R-Y OFF SET 00H (a)
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)
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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
button will change the value of data in the range from 00H to
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 SET-
ID data according to panel
option data.
Exit from Service Mode
VVDD Reduce Volume For Dolby F3H (b)
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)
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
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Pressing POWER button to turn off the TV once.
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.
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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.
(11) DMD Engine System status : LCD Model not used.
(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 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
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power cord in again and turn the TV on.
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). Upgrading in progress.
10 Green is on (solid).
Yellow is off. Upgrading succesful.
11 Green is off.
Yellow is on (solid). Upgrading failed.
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FUNCTION AND OPERATION
TV Front and Side Panel Control and Connection
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