Toshiba REGZA 37HL66 User manual

SERVICE MANUAL
LCD Color Television
37HL66
Ver. 1.02
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. Press MUTE button twice on Control.
↓
↓↓
↓
2. Press MUTE button again and keep in
pressing.
↓
↓↓
↓
Service Mode display
3. While pressing the MUTE button, press
ME U 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:
(a) HOST-MICRO EEPROM data DRMA0477
(b) TV-MICRO EEPROM data DRMA0476
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
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Item Name of adjustment Data
R CUT R CUTOFF **H (a)
G CUT G CUTOFF **H (a)
B CUT B CUTOFF **H (a)
R DRV G DRIVE **H (a)
G DRV G DRIVE **H (a)
B DRV B DRIVE **H (a)
*BRTC BRIGHTNESS CENTER **H (a)
*COLC COLOR CENTER **H (a)
*UVTT BASE BAND TINT **H (a)
*CNTX CONTRAST MAX **H (a)
SHRC SHARPNESS CENTER **H (a)
VBIS VBI Setting **H (a)
CC Closed Caption **H (a)
ID1 VBID **H (a)
GG Gemstar **H (a)
BYBK B Y OFF SET **H (a)
RYBK R Y OFF SET **H (a)
OPT1 TV SET OPTION 1 **H (b)
OPT2 TV SET OPTION 2 **H (b)
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OPT3 TV SET OPTION 3 **H (b)
MAGC AGC of MTS decoder **H (b)
VO1 Volume1 Data **H (b)
V25 Volume25 Data **H (b)
V50 Volume50 Data **H (b)
V75 Volume75 Data **H (b)
V100 Volume100 Data **H (b)
VOLBS Correction Volume at DTV **H (b)
VOLST Correction Volume at Stereo/SAP of ATV **H (b)
EVOL Reduce Volume For Bassboost (Nonuse) **H (b)
VOLX Volume Limiter For Hotel **H (b)
BASX Bass Max Data **H (b)
TREX Treble Max Data **H (b)
TONN Tone Min Data **H (b)
BASC Bass center Data **H (b)
TREC Treble center Data **H (b)
EBAS Add Bass on FOCUS **H (b)
ETRE Add Treble on FOCUS **H (b)
WON2 Bass Reducer **H (b)
ALS ALS point **H (b)
ALOF Reduce in ALL (wow, TruSurround) off **H (b)
VSTB Reduce Volume For Stable Sound **H (b)
VS3D Reduce Volume For SRS3D **H (b)
VFCS Reduce Volume For FOCUS **H (b)
VTBH Reduce Volume For TruBass High **H (b)
VTBL Reduce Volume For TruBass Low **H (b)
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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.
Exit from Service Mode
Pressing POWER button to turn off the TV once.
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.
VVDD Reduce Volume For Dolby **H (b)
WFCS FOCUS Level **H (b)
WWSP SRS 3D Level **H (b)
WTBH TruBass High Level **H (b)
WTBL TruBass Low Level **H (b)
VOLM Volume coefficient at 1/2 Mute **H (b)
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(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 : HL66 not used. (HLV66, 37LX96
USED)
(4) Version information of DMD Engine OEM Revision : LCD Model not used.
(5) Version information of DMD Engine ASIC Revision : LCD Model not used.
(6) Total brightness hour of TV. : Display 4 bytes data.
(7) Count the integrating lighting hour of lamp. : 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.
(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
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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.
"NG : MTS"
"NG : APRO"
"NG : AVSW"
LED Indication Condition
1 Blue is ON (solid). The TV is operating properly.
2 Yellow is ON (solid). In Power Saving mode (standby with Power On Mode Power
Saving).
3 Yellow blinks three times. The TV is in rebooting.
Check the Digital board.
4 Blue blinks slowly. Abnormal operation of BUS line.
• Check the faulty device through the self diagnostics function under SERVICE
mode.
• Does BUS line (SCL, SDA) work normally?
If the BUS line is under abnormal conditions, replace the faulty device with a
new one.
5 Blue blinks quickly. Power Protect Detection.
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Check the cause that the protecting circuit of the power supply.
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FUNCTION AND OPERATION
TV Front and Side Panel Control and Connection
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