(1) The design of this product contains special hardware and many circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel
only.
(2) Alterations of the design or circuitry of the product should not be made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage
resulting therefrom.
(3) Many electrical and mechanical parts in the product have special safety-related characteristics. These characteristics are often
not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are
identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the
schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the
same safety characteristics as the recommended replacement part shown in the Parts List of Service Manual may cause shock,
fire, or other hazards.
(4) The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live parts,
high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When service is
required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to
normal, after re-assembling.
WARNING
(1) The equipment has been designed and manufactured to meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant safety standards.
(4) It is essential that safety critical components are replaced by approved parts.
(5) If mains voltage selector is provided, check setting for local voltage.
(No.YA299)1-3
1.2INSTALLATION
1.2.1 HEAT DISSIPATION
If the heat dissipation vent behind this unit is blocked, cooling
efficiency may deteriorate and temperature inside the unit will
rise. The temperature sensor that protects the unit will be
activated when internal temperature exceeds the pre-determined
level and power will be turned off automatically.Therefore,
please make sure pay attention not to block the heat dissipation
vent as well as the ventilation outlet behind the unit and ensure
that there is room for ventilation around it.
Ventilation hole
1.2.3 INSTALLATION REQUIREMENTS
To ensure safety in an emergency such as an earthquake, and
to prevent accidents, ensure that measures are taken to prevent
the TV dropping or falling over.
Tie commercially available tough cord(s) to the hooks in the back
of the TV, and fix the TV to solid walls or columns.
WALL
HOOK
Ventilation hole
*Diagram differs from actual appearance.
1.2.2 INSTALLATION REQUIREMENTS
Ensure that the minimal distance is maintained, as specified
below, between the unit with and the surrounding walls, as well
as the floor etc.Install the unit on stable flooring or stands.Take
precautionary measures to prevent the unit from tipping in order
to protect against accidents and earthquakes.
䎕䎓䎓䏐䏐䎕䎓䎓䏐䏐
150mm150mm
䎘䎓䏐䏐
*Diagram differs from actual appearance.
䎘䎓䏐䏐
HOOK
It fixes in a band.
TV STAND
*Diagram differs from actual appearance.
1.2.4 NOTES ON HANDLING
(1) WHEN TAKING UNIT OUT OF A PACKING CASE
When taking the unit out of a packing case, do not grasp
the upper part of the unit. If you take the unit out while
grasping the upper part, the LCD PANEL may be damaged
because of a pressure. Instead of grasping the upper part,
put your hands on the lower backside or sides of the unit.
(2) AS FOR PRESSING OR TOUCHING A SPEAKER
Be careful not to press the opening of the speaker in the
lower part of the unit and around them since the decorative
sheet on the surface of the openings may be deformed.
1-4 (No.YA299)
1.3HANDLING LCD PANEL
1.3.1 PRECAUTIONS FOR TRANSPORTATION
When transporting the unit, pressure exerted on the internal LCD
panel due to improper handling (such as tossing and dropping)
may cause damages even when the unit is carefully packed. To
prevent accidents from occurring during transportation, pay
careful attention before delivery, such as through explaining the
handling instructions to transporters.
Ensure that the following requirements are met during
transportation, as the LCD panel of this unit is made of glass and
therefore fragile:
(1) USE A SPECIAL PACKING CASE FOR THE LCD PANEL
When transporting the LCD panel of the unit, use a special
packing case (packing materials). A special packing case
is used when a LCD panel is supplied as a service spare
part.
(2) ATTACH PROTECTION SHEET TO THE FRONT
Since the front (display part) of the panel is vulnerable,
attach the protection sheet to the front of the LCD panel
before transportation. Protection sheet is used when a LCD
panel is supplied as a service spare part.
(3) AVOID VIBRATIONS AND IMPACTS
The unit may be broken if it is toppled sideways even when
properly packed. Continuous vibration may shift the gap of
the panel, and the unit may not be able to display images
properly. Ensure that the unit is carried by at least 2
persons and pay careful attention not to exert any vibration
or impact on it.
(4) DO NOT PLACE EQUIPMENT HORIZONTALLY
Ensure that it is placed upright and not horizontally during
transportation and storage as the LCD panel is very
vulnerable to lateral impacts and may break. During
transportation, ensure that the unit is loaded along the
traveling direction of the vehicle, and avoid stacking them
on one another. For storage, ensure that they are stacked
in 2 layers or less even when placed upright.
1.3.2OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)
(1) Avoid placing the unit under direct sunlight over a
prolonged period of time. This may cause the optical filter
to deteriorate in quality and COLOUR.
(2) Clean the filter surface by wiping it softly and lightly with a
soft and lightly fuzz cloth (such as outing flannel).
(3) Do not use solvents such as benzene or thinner to wipe the
filter surface. This may cause the filter to deteriorate in
quality or the coating on the surface to come off. When
cleaning the filter, usually use the neutral detergent diluted
with water. When cleaning the dirty filter, use water-diluted
ethanol.
(4) Since the filter surface is fragile, do not scratch or hit it with
hard materials. Be careful enough not to touch the front
surface, especially when taking the unit out of the packing
case or during transportation.
1.3.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR
PARTS
Take note of the following when replacing exterior parts (REAR
COVER, FRONT PANEL, etc.):
(1) Do not exert pressure on the front of the LCD panel (filter
surface). It may cause irregular COLOUR.
(2) Pay careful attention not to scratch or stain the front of the
LCD panel (filter surface) with hands.
(3) When replacing exterior parts, the front (LCD panel) should
be placed facing downward. Place a mat, etc. underneath
to avoid causing scratches to the front (filter surface).
(No.YA299)1-5
2.1SYSTEM SETTEING
LOB OK FAN OK
SYNC M:OK S:OK HD:NG
TIM OK
MSM OK DIGI 0000
MEM OK AVSW OK
YC OK AIO OK
TUN OK GCR NG 1
IP OK RGB OK 8
DVI OK HDMI OK
SERVICE MENU
1.ADJUST
2.SELF_CHK
3.I2C STOP
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Be sure to carry out the following operation at the end of
the procedure.
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) When the Main Menu is displayed, press [2] key to enter
the self check mode.
(3) Turn off the power by pressing the [POWER] key on the
remote control unit.
2.2FEATURES
DVB-T (DIGITAL TERRESTRIAL BROADCASTING)
This TV can receive both Digital terrestrial broadcasting (DVBT) and Analogue terrestrial broadcasting.
D.I.S.T. (Digital Image Scaling Technology)
This system uses line interpolation to double the number of
scanning lines and achieve high resolution, flicker-free picture.
COLOUR MANAGEMENT
This function ensures dull colours are compensated to
produce natural hues.
PICTURE MANAGEMENT
This function makes it easier to see the dark areas when a
picture has many dark areas, and makes it easier to see the
bright areas when a picture has many bright areas.
MAIN MENU SCREEN
SERVICE MENU
1.ADJUST
2.SELF_CHK
3.I2C STOP
SELF CHECK MODE SCREEN
LOB OK FAN OK
SYNC M:OK S:OK HD:NG
TIM OK
MSM OK DIGI 0000
MEM OK AVSW OK
YC OK AIO OK
TUN OK GCR NG 1
IP OK RGB OK 8
DVI OK HDMI OK
ZOOM
This function can change the screen size according to the
picture aspect ratio.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
SUPER DIGIPURE
This function uses the latest in digital technology to give you a
natural-looking picture.
MOVIE THEATRE
This function displays a cinema film picture more smoothly and
naturally on the screen.
3D CINEMA SOUND
You can enjoy sounds with a widerambience.
2.3MAIN DIFFERENCE LIST
ItemLT-37DS6BJLT-37DS6BJ/P
DIGITAL SIGNAL PWB----------
1-6 (No.YA299)
2.4HOW TO IDENTIFY MODELS
"PE" are added to the serial No. under at the Rating label.
MODEL No.
SERIAL NO.
NUMERO DE SERIE
LT-37DS6BJ
PE
Indicated
2.521-PIN EURO CONNECTOR (SCART) : EXT-1 / EXT-2
Pin No.Signal designationMatching valueEXT-1EXT-2
1AUDIO R output500mV(rms) (Nominal), Low impedanceUsed (TV OUT)Used (LINE OUT)
2AUDIO R input500mV(rms) (Nominal), High impedanceUsed (R1)Used (R2)
3AUDIO L output500mV(rms) (Nominal), Low impedanceUsed (TV OUT)Used (LINE OUT)
4AUDIO GNDUsedUsed
5GND (B)UsedUsed
6AUDIO L input500mV(rms) (Nominal), High impedanceUsed (L1)Used (L2)
7B input700mV
8FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance
, 75ΩUsedUsed
(B-W)
UsedUsed
9GND (G)UsedUsed
10SCL / T-V LINKNot used Used (SCL2 / TV-LINK)
11G input700mV
, 75ΩUsedUsed
(B-W)
12SDANot used Used (SDA2)
13GND (R)UsedUsed
14GND (YS)UsedNot used
15R / C inputR : 700mV
C : 300mV
(B-W)
(P-P)
, 75Ω
, 75Ω
Used (R)Used (C2/R)
16Ys input (FAST SW)Low : 0V-0.4V, High : 1V-3V, 75ΩUsedUsed
17GND (VIDEO output)UsedUsed
18GND (VIDEO input)UsedUsed
19VIDEO output1V
20VIDEO / Y input1V
(Negative sync), 75ΩUsed (TV OUT)Used (LINE OUT)
(P-P)
(Negative sync), 75ΩUsedUsed
(P-P)
21COMMON GNDUsedUsed
(P-P= Peak to Peak, B-W= Blanking to white peak)
[Pin assignment]
20 18 16 14 12 10 8 6 42
21 19 17 15 13 11 9 7 53 1
(No.YA299)1-7
2.6TECHNICAL INFORMATION
2.6.1 LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light
does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
2.6.1.1SPECIFICATIONS
The following table shows the specifications of this unit.
ItemSpecifications
Maximum dimensions ( W × H × D ) 877 mm × 545 mm × 56 mm
Weight8.5 kg
Effective screen sizeDiagonal: 949 mm (H: 826 mm × V: 467 mm)
Aspect ratio16 : 9
Drive device / systema-Si-TFT active matrix system
ResolutionHorizontally 1366 × Vertically 768 × RGB < W-XGA > 3147264 dots in total
Pixel pitch (pixel size)Horizontally: 0.6 mm Vertically: 0.6 mm
Displayed colour16777216 colours 256 colours for R G and B
Brightness500cd/m2
Contrast ratio800 : 1
Response time6 ms
View angleHorizontally: 170° , Vertically: 170°
Surface polarizerAnti-Glare type Low reflective coat
Panel interface systemLVDS (Low Voltage Differential Signaling)
2.6.1.2PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off.
For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
DARK FAULT
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting.
For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.
FLICKER FAULT
In the pixel fault, a cell that should light originally or not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on
and off.
1-8 (No.YA299)
2.6.2 MAIN CPU PIN FUNCTION [IC7501 : DIGITAL SIGNAL PWB]
PinPin nameI/OFunction PinPin nameI/OFunction
1TCKI Test purpose65D2I/O Program ROM data for main CPU
2TMSI Test purpose66D12I/O Program ROM data for main CPU
3TDII Test purpose67D10I/O Program ROM data for main CPU
4TDOO Test purpose68VSS33- GND
5P2.8O Not used69VDD33I 3.3V
6P2.9O Blue for OSD70D4I/O Program ROM data for main CPU
7P2.10O Blue for OSD71D3I/O Program ROM data for main CPU
8P2.11O Blue for OSD72D11I/O Program ROM data for main CPU
9P2.12O Blue for OSD73RSTINI Reset
10P2.13O Blue for OSD74POWERO Sleep state release for chassis CPU [Relese : L]
11P2.14I Not used75P3.1O Not used
12P2.15O Request for chassis CPU communication76REMOCONIRemote control
13VSS33- GND77P3.3I Clock for OSD
14VDD33I 3.3V78P3.4O Red for OSD
15P4.5O Not used79P3.5O Red for OSD
16A20O Program ROM address for main CPU80P3.6O Red for OSD
17A19O Program ROM address for main CPU81P3.7O Red for OSD
18A18O Program ROM address for main CPU82MTSTO Data transmission for chassis CPU communication
19A17O Program ROM address for main CPU83MTSRI Data receive for chassis CPU communication
20VSS25- GND84VSS33- GND
21VDD25I 2.5V85VDD33I 3.3V
22A16O Program ROM address for main CPU86VSS25- GND
23A8O Program ROM address for main CPU87VDD25I 2.5V
24A7O Program ROM address for main CPU88TXD0O Communication for adjustment
25A9O Program ROM address for main CPU89RXD0O Communication for adjustment
26A6O Program ROM address for main CPU90P3.12O Red for OSD
27A5O Program ROM address for main CPU91CLKO Clock for chassis CPU communication
28A10O Program ROM address for main CPU92P3.15O Green for OSD
29A11O Program ROM address for main CPU93P5.14O Green for OSD
30A12O Program ROM address for main CPU94P5.15O Green for OSD
31VSS33-GND95TRIG_INO Green for OSD
32VDD33I 3.3V96TRIG_OUTO Green for OSD
33A4O Program ROM address for main CPU97P6.2O Green for OSD
34A3O Program ROM address for main CPU98P6.3O I
35A2O Program ROM address for main CPU99P6.4I/O I
36A1O Program ROM address for main CPU100P6.5O Teletext signal select [Analog RGB : H / Digital RGB : L]
37A0O Program ROM address for main CPU101IRQO Not used
38A13O Program ROM address for main CPU102VSYNCI Vertical sync
39ARAS/A14O Program ROM address for main CPU103HSYNCI Horizontal sync
40CAS/A15O Program ROM address for main CPU104
41VSS33- GND105BLANKO Ys for OSD / Teletext
42VDD33I 3.3V106VDD33I 3.3V
43MEMCLKO Clock for memory107VSS33-GND
44CSSDRAMO Chip select for memory108XTAL1I 6MHz for system clock
45CLKENO Clock enable for memory109XTAL2O 6MHz for system clock
46CSROMO Chip select for memory110VSSA- GND
47RDO Read for memory111VDDAI 2.5V
48UDQMO Control buffer of memory112RO R for OSD / Teletext
49LDQMO Control buffer of memory113GO G for OSD / Teletext
50WRO Write for memory114BO B for OSD / Teletext
51D15I/O Program ROM data for main CPU115 VSSA- GND
52VSS33- GND116VDDAI 2.5V
53VDD33I 3.3V117CVBS2I Video for Teletext
54D7I/O Program ROM data for main CPU118VSSA- GND
55D0I/O Program ROM data for main CPU119VDDAI 2.5V
56D14I/O Program ROM data for main CPU120CVBS1BI Video for Teletext
57D8I/O Program ROM data for main CPU121CVBS1AI Video for Teletext
58D6I/O Program ROM data for main CPU122VSSA- GND
59D1I/O Program ROM data for main CPU123VDDAI 2.5V
60VSS33- GND124KEY1I Key scan data 1 [ON : H]
61VDD33I 3.3V125KEY2I Key scan data 2 [ON : H]
62D13I/O Program ROM data for main CPU126MECA_SWI Main power ON / OFF control [ON : L]
63D9I/O Program ROM data for main CPU127P5.3I Not used
64D5I/O Program ROM data for main CPU128TMODEI Test purpose
COR/RSTOUT
2
C bus clock (for main memory)
2
C bus Data (for main memory)
O Not used
(No.YA299)1-9
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