Toshiba 37HLC56 - 37" LCD Flat Panel Display User manual

SERVICE MANUAL
LCD Color Television
37HLC56 Ver. 1.01
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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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 Su stances. From July 1, 2006, the RoHS Directive will
prohi it any marketing of new products containing the restricted su stances.
Increasing attention is given to issues related to the glo al environmental. Toshi a
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, Toshi a 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 e 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
1 4ºF (3 ºC to 4 ºC). 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 usin lead free solder.
DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT!
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IMPORTANT NOTICE
A Known Malfunction
Autodesk® DWF™ iewer version
(Free software provided through WEB)
Use Autodesk DWF Viewer ver. 6.0.
Through WEB, ver. 6.5 has been re eased but with it, the inking function in this manua may
not work proper y.
If ver. 6.5 has been insta ed, uninsta it and reinsta ver. 6.0.
To get ver. 6.0, c ick the icon, or contact to the nearest Toshiba Service Centre for further
assistance.
Freezing windows opened
(Cannot close the open windows)
This may happen occasiona y.
In case of encountering this, fo ow the procedure be ow.
1. Press [Ctr ], [A t] and [De ete] keys at the same time to engage windows security
windows.
2. Then, choose TASK manager and App ication tab, and se ect TOSHIBA SERVICE
MANUAL-Microsoft Internet Exp orer.
3. C ick TASK-end.
Main Window back forwarded
The rea cause has not been found yet but with this condition, nothing disturbs the service
manua operation.
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Continue to use by operating the windows.
Precaution when opening the diagrams
Whi e opening the diagrams, the menu in the eft frame changes its co or to GRAY. This is
an indication that the viewer is processing.
With this condition, the menu indication co or may stick to the GRAY co or or Windows
may freeze if c icking other menu.
To avoid such things, do not operate any others whi e menu turns GRAY co or.
If entering this, re-open the service manua or refresh the eft 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 P2 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.
. 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 : 024 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 earch 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. 
ignal 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. 
pecified 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
rovided herein without rior written consent by Toshiba. Toshiba shall not
be liable to anybody for any damages, losses, ex enses 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, ex enses or costs, if
any, incurred in connection with or as a result of use of any information or
data rovided herein.
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ADJUSTMENT
Service Mode
Entering to Service Mode
1. Set VOLUME to minimum and press MUTE
button once on remote control.
↓
↓↓
↓
2. Press MUTE button again and hold button
down.
↓
↓↓
↓
Service Mode display
.
While holding the MUTE button, press MENU
button on TV set.
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Displaying the Adjustment Menu
Press MENU button on TV.
Key Function in the Service Mode
The following key entry during display of adjustment menu provides special functions.
Service Mode
Press ↑
↑↑
↑ ↓
↓↓
↓ Press
Adjustment Mode
AUTION: Never try to perform initialization unless you have changed the
memory I .
button (on remote control)
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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
[ SERVI E MODE ]
ADJUSTING ITEMS AND DATA IN THE SERVI E MODE:
Note: The image system data of RCUT-BDRV is different by each image format.
Test signal selection
Selection of the adjustment items CH (on T or remote control)
Change of the data value olume +/- (on T or remote control)
Adjustment menu mode ON/OFF MENU button (on T )
Initialization of the memory (QA02) CALL + CH button on T ( )
"RCUT" selection 1 button
"GCUT" selection 2 button
"BCUT" selection 3 button
"CNTX" selection 4 button
"COLC" selection 5 button
"U TT" selection 6 button
Automatic A/D Adjustment
(PC, Component, Composite (NTSC)) 7 button
Self diagnostic display ON/OFF 9 button
Item Name of adjustment
anada
Preset Data
RCUT R CUT OFF 00H ←
GCUT G CUT OFF 00H ←
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Adjusting the Data
Pressing of VOLUME +/- button will change the value of data in the range from 00H to
FFH. The variable range depends on the adjusting item.
Exit from Service Mode
Pressing POWER button to turn off the TV once.
Initialization of Memory Data of QA02
After replacing QA02, the following initialization is required.
BCUT B CUT OFF 00H ←
RDR R DRI E 79H ←
GDR G DRI E 7CH ←
BDR B DRI E 87H ←
BRTC BRIGHTNESS CENTER FDH ←
COLC COLOR CENTER C8H ←
U TT BASE BAND TINT FEH ←
CNTX CONTRAST MAX 86H ←
OLUX MAX OLUME LIMITED 7FH ←
PLLW0 PLL WAIT TIME 14H ←
PLLW1 PLL WAIT TIME 03H ←
PLLW2 PLL WAIT TIME 0FH ←
PLLW3 PLL WAIT TIME 05H ←
PLLW4 PLL WAIT TIME 14H ←
PLLW5 PLL WAIT TIME 04H ←
AUTION: Never attempt to initialize the data unless QA02 has been
replaced.
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1. Enter the service mode, then select any register item.
2. Press and hold the CALL button on the remote control, then press the CH button on
the TV.
The initialization of QA02 has been completed.
. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform "Auto tune" on the owner's manual.
Test Signal Selection
Every pressing of INPUT button on the remote control changes the built-in test patterns on
screen as described below in Service Mode.
Picture Signal
Red raster
Green raster
Blue raster
All Black
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Self Diagnostic Function
1. Press "9" button on remote control during display of adjustment menu in the service
mode. The diagnosis will begin to check if interface among IC's is executed properly.
2. During diagnosis, the following displays are shown.
All White
(1) Firmware :
Version information of microprocessor
In case of file name : HCL56 and Version : 0459 indicates [HLC56_0459].
(2) Time : Total hour of turn the TV on. (Unit : H)
( ) Bus line : -- "OK" is normal
SCL-GND (Red indication) : SCL-GND short circuit
SDA-GND (Red indication) : SDA-GND short circuit
SCL-SDA (Red indication) : SCL-SDA short circuit
(4) Bus cont : --- "OK" is normal.
When the abnormal status is detected, the type name of semiconductor is
indicated in red color.
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Version heck Mode
1. Press "9" button twice on remote control during display of adjustment menu in the
service mode.
The version of the main MPU will be checked.
2. During Version Check, the following displays are shown.
(5) Block
V1 - V4 : VIDEO 1-4 input mode
PC : PC mode
HL 56
1
ideo1/
ColorStreamHD1
(Composite/Component)
2 ideo2
(Composite/S- IDEO)
3 ColorStreamHD2
(Component)
4 HDMI
PC PC
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(1) MAIN MPU :
Version information of microprocessor
In case of file name : HLC56, Version 4569 for Code Program Version and (U01) for
OSD Version indicates [HLC56_0459(U01)]
(2) EEPROM :
Version information of EEPROM : Display 1 byte data.
( ) SUB MPU :
Version information of SUB MPU : Display 1 byte data.
(4) OPTION :
Option information : Display six numbers of 1 byte data.
(5) HDMI ID :
HDMI ID information : Display 4 byte data.
(6) A/D Adjust
A/D adjustment item.
--COMP : Component input
--PC : PC input
--NTSC :
NTSC (60 Hz) SD signal (composite input)
--OK : A/D adjustment set correctly.
--NG : A/D adjustment set incorrect.
(7) LCD Panel Vender information display
The following Panel Vender and screen size are displayed.
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Status heck Mode
1. Press "9" button thrice on remote control during display of adjustment menu in the
service mode.
The status of the model will be checked.
2. During Status Check, the following displays are shown.
Example : AUO- 2 indicates that Vender is AUO and Screen Size is 2 inch.
Panel Vender Screen Size (Inch)
LPL -26
SHP -32
CMO -37
(1) MAIN :
Main source information : Input Source (EXT1/2/ /HDMI etc.)
(2) MAIN FORMAT :
Display Video and PC format information
( ) SCREEN SIZE :
Display the screen size as follows.
TheaterWide 1
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LED Indication
Red LEDs on the TV (at the bottom center of the TV) indicate the TV's status, as described
below.
Red OFF = The TV is in a standby mode.
Red ON = The TV is in a normal operation mode.
TheaterWide 2
TheaterWide 3
FULL
NATURAL
4:3 HD
(4) OTHER STATUS :
Other status information : Display three numbers of 2 byte data.
LED Indication ondition Solution
1 Red blinks continuously at 0.5-
second intervals.
Abnormal operation Turn OFF the T and unplug
the power cord.
Plug the power cord in again
and turn ON the T .
2 Red blinks continuously at 1-
second intervals.
Abnormal operation of
BUS line.
Turn OFF the T and unplug
the power cord.
Plug the power cord in again
and turn ON the T .
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