FLOF (Fastext level 2.5) / TOP / WST(World Standard system)
Contents
28.0 kg [Included stand]
25.9 kg [TV only]
---
RM-C1910 (AA/R6 dry cell battery × 2)
Design & specifications are subject to change without notice.
1-2 (No.YA545)
SECTION 1
PRECAUTION
1.1SAFETY PRECAUTIONS [EXCEPT FOR UK]
(1) The design of this product contains special hardware,
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 products 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 products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily 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 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) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.
(5) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(6) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
b) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal part of the cabinet, particularly
any exposed metal part having a return path to the chassis,
to a known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).
Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use
an AC voltmeter having 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to
0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
GOOD EARTH GROUND
1500 10W
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
(No.YA545)1-3
1.2SAFETY PRECAUTIONS [FOR UK]
(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.
1-4 (No.YA545)
1.3INSTALLATION
1.3.1 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.
1.3.3 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.
It fixes in a band.
Ventilation hole
*Diagram differs from actual appearance.
1.3.2 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.
200 mm
150 mm50
*Diagram differs from actual appearance.
mm
150 mm50 mm
TV STAND
*Diagram differs from actual appearance.
1.3.4 NOTES ON HANDLING
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.
1.4HANDLING LCD PANEL
1.4.1 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.
(No.YA545)1-5
1.4.2OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 0
RESET : OK 1
(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.
1.4.3 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).
1.4.4 HOW TO CHECK THE OPERATING TIME
This model has a function to count and record the LCD panel
operating time. The operating time can be checked in the
following procedure.
• Maximum count time = 131070 hours
(1) Press the [INFORMATION] key and [MUTING] key simul-
taneously, then enter the SERVICE MODE.
(2) When the Main Menu is displayed, press [2] key to enter
the self check mode.
(3) The operating time of the LCD panel is displayed in 5-digit
decimal number.(Refer to the below figure)
SERVICE MODE SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
Press [2] key
Switch the display/ non-display
with the [ZOOM] key.
SELF CHECK MODE SCREEN (Page 1)
The operating time is displayed
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 0
RESET : OK 1
MAX is displayed when the maximum
count time is exceeded
*When the power is turned off with the remote control unit or the power
button of the main unit, the count restarts from the turn off time.
*When the power is turned off by disconnecting the power cord from the
AC outlet, the recorded time count less than 2 hours is not counted.
*When the operating time exceeds the maximum count time, "MAX" is
displayed to the right of the counted time, and the following count is
discontinued.
1.4.5 HOW TO RESET THE OPERATING TIME
(1) Press the [MENU] key simultaneously, then enter the
USER MENU.
(2) Select the "Features" from the USER MENU.
(3) Select the Blue back from the Features.
(4) Set the Blue back to Off.
(5) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(6) When the Main Menu is displayed, press [2] key to enter
the self check mode.
(7) When the self check screen(page-1) is displayed, press
[ZOOM] key.
(8) "RESET : OK" is displayed under the operating time.
(9) Press the [TV] key to reset the operating time.
NOTE:
When the LCD PANEL UNIT is replaced, be sure to reset the
operating time following the above method.
1-6 (No.YA545)
2.1SYSTEM SETTING
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 0
RESET : OK 1
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.
SERVICE MODE SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
Press [2] key
SELF CHECK MODE SCREEN (Page 1)
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 0
RESET : OK 1
2.2FEATURES
100Hz Clear Motion Drive
This function is able to display twice as many frames as a
conventional LCD display.
DIGITAL TUNER [LT-42DP8 series only]
This TV can receive both DVB-T (Digital terrestrial broadcasting)
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
Smart Picture
This function detects the APL (Average Picture Level) and
adjusts the contrast suitable for what you are watching.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
MPEG Noise Reduction
This function effects the block noise removal and mosquito NR
simultaneously.
MaxxAudio
MaxxAudio improves sound performance with four sound
features (MaxxBass, MaxxTreble, MaxxStereo and
MaxxVolume).
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.
2.3MAIN DIFFERENCE LIST
ItemLT-42DP8BJ/PLT-42DP8BG/PLT-42P80BU/P
Digital TunerYES←NO
Teletext (Digital)MHEG 5 UK profileEBU TEXTNO
Indoor ANT Power SupplyYES←NO
Digital Audio Optical OutputYES←NO
Remote Control UnitRM-C1911←RM-C1910
(No.YA545)1-7
2.421-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 (C1/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), 75ΩUsed (Y1/V)Used (Y2/V)
(P-P)
21COMMON GNDUsedUsed
(P-P= Peak to Peak, B-W= Blanking to white peak)
[Pin assignment]
20 18 16 14 12 10 86 4 2
21 19 17 15 13 11 97 5 31
1-8 (No.YA545)
2.5TECHNICAL INFORMATION
2.5.1 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.
2.5.1.1SPECIFICATIONS
The following table shows the specifications of this unit.
ItemSpecifications
Maximum dimensions ( W × H × D )98.3 cm × 57.6 cm × 5.2 cm
Weight15.0 kg
Effective screen sizeDiagonal: 1050 mm (H: 930.25 mm × V: 523.01 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: 0.681 mm, Vertically: 0.681 mm
Displayed colour16777216 colours 256 colours for R G and B
Surface polarizerAnti-Glare type Low reflective coat
Colour filterVertical stripe
BacklightCold cathode fluorescent lamp × 20
Power supply voltage in LCD12 V
Power supply voltage in inverter24 V
Panel interface systemLVDS (Low Voltage Differential Signaling)
2.5.1.2PIXEL 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.
(No.YA545)1-9
2.5.2 MAIN CPU PIN FUNCTION [IC7301
PinPin nameI/OFunction PinPin nameI/OFunction
1TCKO 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
5P2.8I Input for HDMI CEC69VDD33I 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 [Release : L]
11P2.14I TV-LINK data75P3.1O Reset for digital tuner unit
12P2.15O Request for chassis CPU communication76REMOCONIRemote control
13VSS33-GND77P3.3I Clock for OSD
14VDD33I 3.3V78P3.4O Red for OSD
15P4.5O TV-LINK data79P3.5O 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 CPU82MTSTI/O Data transmission for chassis CPU communication
19A17O Program ROM address for main CPU83MTSRI/O 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 CPU88TXD0I/O Data transmission for digital tuner unit
25A9O Program ROM address for main CPU89RXD0I/O Data receive for digital tuner unit
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 Output for HDMI CEC
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 CPU98P6.3I/O I
35A2O Program ROM address for main CPU99P6.4I/O I
36A1O Program ROM address for main CPU100P6.5O Sync signal select for OSD / Teletext
37A0O Program ROM address for main CPU101IRQO Interrupt request for digital tuner unit
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 Teletext
49LDQMO Control buffer of memory113GO G for Teletext
50WRO Write for memory114BO B for Teletext
51D15I/O Program ROM data for main CPU115VSSA- GND
52VSS33-GND116VDDAI 2.5V
53VDD33I 3.3V117CVBS2I Not used
54D7I/O Program ROM data for main CPU118VSSA- GND
55D0I/O Program ROM data for main CPU119VDDAI2.5V
56D14I/O Program ROM data for main CPU120CVBS1BI Not used
57D8I/O Program ROM data for main CPU121CVBS1AIVideo for Teletext
58D6I/O Program ROM data for main CPU122VSSA- GND
59D1I/O Program ROM data for main CPU123VDDAI2.5V
60VSS33-GND124KEY1I Key scan data 1 [ON : H]
61VDD33I 3.3V125KEY2IKey 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 CPU127
64D5I/O Program ROM data for main CPU128TMODEI Test purpose
: DIGITAL PWB]
COR/RSTOUT
(KEYP2)P5.3
2
C bus clock (for main memory)
2
C bus Data (for main memory)
O Not used
I Error detection for digital tuner unit
1-10 (No.YA545)
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
• Be sure to perform the SYSTEM SETTING, at the end of the procedure.
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
REFERENCE:
When removing each board, remove the connector if necessary. The operation is easier if you write down the connection points
(connector numbers) of the connector. For connection of each board, refer to the "WIRING DIAGRAM" of the Standard Circuit
Diagram.
3.1.1 REMOVING THE REAR COVER (Fig.3-1)
(1) Remove the 1 screw [A].
(2) Remove the POWER CORD COVER.
(3) Remove the POWER CORD.
(4) Remove the 10 screws [B], 4 screws [C], 5 screws [D], 2
screws [E] and 1 screw [F].
(5) Remove the REAR COVER.
3.1.2 REMOVING THE ANALOG PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 1 screw [G].
(2) Remove the TUNER BASE.
(3) Remove the 3 hooks [a], 2 screws [H] and 3 screws [I].
(4) Remove the TERMINAL BASE.
(5) Remove the 5 screws [J] and 2 screws [K].
(6) Remove the ANALOG PWB.
3.1.3 REMOVING THE DC-DC PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 2 screws [L].
(2) Remove the DC-DC PWB.
3.1.4 REMOVING THE POWER PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 11 screws [M].
(2) Remove the POWER PWB.
3.1.5 REMOVING THE SW PWB (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 2 screws [N].
(2) Remove the CONTROL KNOB with SW PWB.
(3) Remove the 2 screws [O].
(4) Remove the SW PWB from the CONTROL KNOB.
3.1.6 REMOVING THE DIGITAL TUNER UNIT
[LT-42DP8 series only] (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 9 hooks [b].
(2) Remove the SHIELD COVER.
(3) Remove the 2 screws [P], 2 screws [Q] and 2 screws [R].
(4) Remove the SHIELD TERMINAL.
(5) Remove the 4 screws [S].
(6) Remove the DIGITAL TUNER UNIT.
3.1.7 REMOVING THE DIGITAL PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the SHIELD COVER.
• Remove the SHIELD TERMINAL.
• Remove the DIGITAL TUNER UNIT. [LT-42DP8 series only]
(1) Remove the 7 screws [T].
(2) Remove the DIGITAL PWB BRACKET.
[LT-42DP8 series only]
(3) Remove the 2 screws [U].
(4) Remove the DIGITAL PWB.
CAUTION :
Make sure to perform the "SYSTEM SETTING", when
DIGITAL PWB is replaced.
3.1.8 REMOVING THE SPEAKER (Fig.3-1)
• Remove the REAR COVER.
(1) Remove the 2 screws [V].
(2) Remove the SPEKAER.
(3) Follow the same steps when removing the other hand
SPEAKER.
3.1.9 REMOVING THE STAND ASS'Y (Fig.3-1)
(1) Remove the 1 screw [F] and 4 screws [W].
(2) Remove the STAND ASS'Y.
3.1.10 REMOVING THE LED PWB (Fig.3-1)
• Remove the REAR COVER.
• Remove the STAND ASS'Y.
(1) Remove the 5 screws [X] and 2 screws [Y].
(2) Remove the STAND BASE SUPPORT.
(3) Remove the 2 screws [Z] and 2 hooks [c].
(4) Remove the LED PWB.
3.1.11 REMOVING THE LCD PANEL UNIT (Fig.3-1)
• Remove the REAR COVER.
• Remove the STAND ASS'Y.
• Remove the STAND BASE SUPPROT.
• Remove the SPEKAER.
(1) Remove the 4 screws [AA], 4 screws [AB] and 4 screws
[AC].
(2) Remove the MAIN BASE.
(3) Remove the LCD PANEL UNIT from the FRONT PANEL.
(No.YA545)1-11
POWER CORD COVER
A
B
B
C
D
POWER CORD
F
B
D
E
b
J
REAR COVER
H
ANALOG PWB
M
a
TERMINAL
I
BASE
DC-DC PWB
L
AB
AC
POWER PWB
L
SHIELD COVER
DIGITAL TUNER UNIT
DIGITAL PWB BRACKET
U
S
T
SHIELD TERMINAL
P
R
Q
AB
AC
K
N
CONTROL
KNOB
MAIN BASE
O
SW PWB
AC
LCD PANEL UNIT
N
LED PWB
AA
AC
G
TUNER BASE
Z
c
DIGITAL PWB
AA
X
STAND BASE
SUPPORT
V
W
Y
STAND ASS'Y
V
SPEAKER
FRONT PANEL
1-12 (No.YA545)
SPEAKER
Fig.3-1
The illustration is LT-42DP8 series
3.1.12 REMOVING THE LCD CONTROL PWB (Fig.3-2)
• Remove the REAR COVER.
• Remove the STAND ASS'Y.
• Remove the STAND BASE SUPPROT.
• Remove the MIAN BASE.
(1) Remove the 4 screws [A].
(2) Remove the LCD CONTROL PWB COVER.
(3) Remove the LCD CONTROL PWB.
3.1.13 REMOVING THE INVERTER PWB (Fig.3-2)
• Remove the REAR COVER.
(1) Remove the 5 screws [B].
(2) Remove the INVERTER PWB COVER.
(3) Remove the INVERTER PWB.
(4) Follow the same steps when removing the other hand
INVERTER PWB.
LCD CONTROL PWB COVER
A
B
INVERTER PWB(MASTER)
COVER
INVERTER PWB(MASTER)
LCD CONTROL PWB
INVERTER PWB(SLAVE)
COVER
B
INVERTER PWB(SLAVE)
FRONT
Fig.3-2
(No.YA545)1-13
3.2MEMORY IC REPLACEMENT
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
S001 R DRIVE 137
PAL50 FULL STD H
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC TABLE
Symbol Number of pins Mounting PWBMain content of data
IC7201
IC7602
48-pinDIGITAL PWBProgram (Video process) of IC6001(System CPU) is memorized.
8-pinDIGITAL PWBSetting value of IC7301(MAIN CPU) is memorized.
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting values.
3. Power on
Connect the power plug to the AC outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.
5. User setting
Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.3-3). Refer to the SERVICE ADJUSTMENT for setting.
3.2.3 SERVICE MODE SETTING
SERVICE MODE SCREEN
MAIN MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
ADJUSTMENT MODE SCREEN
S001 R DRIVE 137
PAL50 FULL STD H
Fig.3-3
SETTING ITEM
Setting itemsSettingsItem No.
Video system settingAdjustS001 - S009
(Not used)FixedT001 - T003
(Not used)FixedM001 - M224
(Not used)FixedF001 - F002
(Not used)FixedD001
(Not used)FixedZ001
3.2.4 SETTINGS OF FACTORY SHIPMENT
3.2.4.1BUTTON OPERATION
Setting itemSetting position
POWEROff
CHANNELPR1
VOLUME10
TV/AVTV
3.2.4.2REMOTE CONTROL DIRECT OPERATION
Setting itemSetting position
CHANNELPR1
VOLUME10
ZOOMAuto
SUB PICTUREEXT-1
SUB POWEROff
1-14 (No.YA545)
3.2.4.3REMOTE CONTROL MENU OPERATION
(1) PICTURE
Setting itemSetting position
Picture ModeBright
Colour Temp.Cool
Features
Super Digipure Auto
Movie Theatre Auto
Colour Management On
Picture Management On
Smart Picture On
MPEG Noise Reduction Off
Colour SystemMain Depends PR
Sub Auto
4:3 Auto AspectPanoramic
(2) SOUND
Setting itemSetting position
Stereo / I•iiStereo Sound
MaxxAudioLow
BalanceCentre
Voice EnhancerOff
(3) FEATURES
Setting itemSetting position
Sleep TimerOff
Child LockOff (ID:0000)
AppearanceType A
Blue BackOn
Favorite SettingBlank
IlluminationBright
Power LampOn
Eco ModeOff
(4) SET UP
Setting itemSetting position
Auto ProgramTv Channel Automatically Set
Edit/manual-
LanguageEnglish
Decoder (Ext-2)Off
Component Auto SelectOff
HDMIHDMI CEC: On
Size: Auto
Audio: Auto
AttenuatorOff
PC PositionCentre
Auto DemonstrationOff
Ext Setting
S-INBlank
IDBlank
DubbingExt-1 → Ext-2
(5) DTV [LT-42DG8 series only]
[For UK]
Setting itemSetting position
Configuration
Audio LanguageEnglish
Subtitle LanguageEnglish
Favourite ModeOff
Menu LockDisable
[For other country]
Setting itemSetting position
Configuration
Country--- *
Menu Language--- *
Audio Language--- *
Subtitle Language--- *
Teletext Language--- *
EPG Language--- *
Enter PIN Code0000
Favourite ModeOff
Maturity RatingOff
*It differs according to the language that the user selected.
[For All country]
Setting itemSetting position
Setup
Digital Audio OutputPCM
Banner Duration2sec
Receiver UpgradeAuto
Common Interface---
Antenna PowerOff
(No.YA545)1-15
3.3REPLACEMENT OF CHIP COMPONENT
3.3.1 CAUTIONS
(1) Avoid heating for more than 3 seconds.
(2) Do not rub the electrodes and the resist parts of the pattern.
(3) When removing a chip part, melt the solder adequately.
(4) Do not reuse a chip part after removing it.
3.3.2 SOLDERING IRON
(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.
3.3.3 REPLACEMENT STEPS
1. How to remove Chip parts
2. How to install Chip parts
[Resistors, capacitors, etc.]
(1) As shown in the figure, push the part with tweezers and
alternately melt the solder at each end.
(2) Shift with the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply extra solder to each lead.
SOLDER
SOLDER
[Resistors, capacitors, etc.]
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder. Then heat and melt the solder at both ends of the
chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the
solder.
(3) First solder lead A as indicated in the figure.
(2) As shown in the figure, push the part with tweezers and
alternately melt the solder at each lead. Shift and remove
the chip part.
NOTE :
After removing the part, remove remaining solder from the
pattern.
1-16 (No.YA545)
A
B
C
(4) Then solder leads B and C.
A
B
C
SECTION 4
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
ADJUSTMENT
4.1ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the
REMOTE CONTROL UNIT and the other is the
conventional method using adjustment parts and
components.
(2) The adjustment using the REMOTE CONTROL UNIT is
made on the basis of the initial setting values. The
setting values which adjust the screen to the optimum
condition can be different from the initial setting
values.
(3) Make sure that connection is correctly made AC to AC
power source.
(4) Turn on the power of the TV and measuring instruments for
warming up for at least 30 minutes before starting
adjustments.
(5) If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors,
transformers and condensers) not shown in the adjustment
items of this service adjustment.
4.2PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Setting itemSettings position
Picture ModeStandard
Picture AdjustmentsCentre
Colour Temp.Normal
Super DigipureAuto
Movie TheatreAuto
Colour ManagementOn
Picture ManagementOn
ZoomFull
4.3MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator) [PAL]
• Remote control unit
4.5BASIC OPERATION OF SERVICE MODE
4.5.1 HOW TO ENTER THE SERVICE MODE
(1) Press [INFORMATION] key and [MUTING] key on the
remote control unit simultaneously to enter the SERVICE
MODE SCREEN.
(2) In the SERVICE MENU, press the [1] key to display
ADJUSTMENT MODE SCREEN.
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
NOTE:
• Before enter the SERVICE MODE, press the [MODE] key to
confirm that "TV" position is indicated. If it is in a wrong
position, the SERVICE MODE operation cannot be
performed.
• When a number key other than the [1] key is pressed in the
SERVICE MODE SCREEN, the other relevant screen may
be displayed.
This is not used in the adjustment procedure. Press the
[MENU] key to return to the SERVICE MODE SCREEN.
4.5.2 HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the Service mode.
4.5.3 SERVICE MODE SELECT KEY LOCATION
[MUTING] key
[Nunber] key
4.4ADJUSTMENT ITEMS
VIDEO CIRCUIT
• WHITE BALANCE (HIGH LIGHT) adjustment
[INFORMATION] key
[Red] key
[MODE] key
[Function/] key
[Green] key
[MENU] key
[FUNCTION
/] key
(No.YA545)1-17
4.5.4 ADJUSTMENT MODE
S001 R DRIVE 137
PAL50 FULL STD H
This mode is used to adjust the VIDEO CIRCUIT and the MTS CIRCUIT.
4.5.4.1 HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE.
4.5.5 DESCRIPTION OF STATUS DISPLAY
(3) PICTURE MODE
SOFT: SOFT
ADJUSTMENT MODE
SETTING ITEM No.
SETTING ITEM
SETTING VALUE (DATA)
STD: STANDARD
BRI: BRIGHT
(4) COLOUR TEMP.
H: COOL
M: NORMAL
S001 R DRIVE 137
PAL50 FULL STD H
L: WARM
(5) SETTING ITEM NAME
Setting item name are displayed. For the setting item names
to be displayed, refer to "INITIAL SETTING VALUES IN THE
SERVICE MODE".
Changed setting value is memorized by pressing [MUTING]
key.
1-18 (No.YA545)
4.6INITIAL SETTING VALUES IN THE SERVICE MODE
• Perform fine-tuning based on the "initial values" using the remote control when in the Service mode.
• The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved
may be different from the default values. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They
are fixed values.
[1.ADJUST]
S001: R DRIVE (Red drive)
S002: G DRIVE (Green drive)
S003: B DRIVE (Blue drive)
(1) Receive a PAL 75% all white signal.
(2) Set PICTURE MODE to "STANDARD".
(3) Set ZOOM to "FULL".
(4) Set COLOUR TEMP. to "NORMAL".
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Adjust to Keep one of <S001> (Red drive),
<S002> (Green drive) or <S003> (Blue drive)
unchanged, then lower the other two so that the
all-white screen is equally white throughout.
NOTE:
Set one or more of <S001>, <S002>, and
<S003> to "137".
(7) Check that white balance is properly tracked
from low light to high light. If the white balance
tracking is deviated, adjust to correct it.
(8) Press the [MUTING] key to memorize the set
value.
(No.YA545)1-21
SECTION 5
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
TMP 0 L 1 0
L 2 0 DDT 0
FAN 0 L C 0
IRS 0
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 00
00
TROUBLESHOOTING
5.1SELF CHECK FEATURE
5.1.1 OUTLINE
This unit comes with the "Self check" feature, which checks the
operational state of the circuit and displays/saves it during
failure.Diagnosis is performed when power is turned on, and
information input to the main microcomputer is monitored at all
time.Diagnosis is displayed in 2 ways via screen display and LED
flashes. Failure detection is based on input state of I
2
C bus and
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF CHECK MODE
Before enter the SELF CHECK MODE, press the [MODE] key to
confirm that "TV" position is indicated. If it is in a wrong position,
the SELF CHECK MODE operation cannot be performed.
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key SELF CHECK MODE.
(3) Press the [RED] key to enter Page 2 of the SELF CHECK
MODE.
*Use the [GREEN] key to toggle between Page 1 and Page 2.
NOTE:
When a number key other than the [2] key is pressed in the
SERVICE MODE screen, the other relevant screen may be
displayed.
This is not used in the SELF CHECK MODE. Press the
[MENU] key to return to the MAIN MENU SCREEN.
5.1.3 HOW TO EXIT THE SELF CHECK MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the Self check display mode.
To Clear (Reset) Failure History:
Turn off the power by pressing the [POWER] key on the remote
control unit when in the Self check display mode.
5.1.4 FAILURE HISTORY
Failure history can be counted up to 9 times for each item. When
the number exceeds 9, display will remain as 9. Failure history
will be stored in the memory unless it has been deleted.
5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be diagnosed as "Abnormal" and counted.
(1) Temporary defective transmissions across circuits due to
pulse interruptions.
(2) Misalignment in the on/off timing of power for I
2
C bus (Vcc)
when turning on/off the main power.
Therefore, turn on the main power, and then wait for about 3
seconds before starting Self check.
If recurrences are expected, ensure to clear (reset) the failure
history and record the new diagnosis results.
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
Press [2] key
SELF CHECK MODE SCREEN (Page 1)
Item
LOB 0 FAN 0
AUD 0
ANA 9 DIG 9
HOUR 131070 MAX 00
00
Press [Red] key
Failure
history
Failure
Item
history
Press [Green] key
SELF CHECK MODE SCREEN (Page 2)
1-22 (No.YA545)
Not used
TMP 0 L 1 0
L 2 0 DDT 0
FAN 0 L C 0
IRS 0
Fig.5-1
5.1.6 DETAILS
Self check is performed for the following items: (---- is not used items)
the power is turned on. If error
continues between 200 ms the
power is turned off.
SDADetection starts 3 seconds after
the power is turned on. If it checks
whenever I2C communication is
performed and no reply of ACK
signal an error will be counted.
SDADetection starts 3 seconds after
the power is turned on. If it checks
whenever I2C communication is
performed and no reply of ACK
signal an error will be counted.
Diagnosis
signal (line)
Detection timing
Detection timing
5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT
In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.
Type of errorPOWER LED flash cycle
Low bias line short protectionPOWER LED turnig on and off at 1 second intervals.
<Explanation of operation>
If error is detected, the power is turned off.
Shortly after a power is turned off, POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.
(No.YA545)1-23
Victor company of Japan, Limited
Display category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
The components identified by thesymbol and shading are
critical for safety. For continued safety replace safety ciritical
components only with manufactures recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
following conditions.
(1)Input signal: Colour bar signal
(2)Setting positions of
each knob/button and
variable resistor
(3)Internal resistance of tester
(4)Oscilloscope sweeping time
(5)Voltage values
Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.
Rated allowable power
No indication: 1/16 [W]
Others: As specified
Type
No indication
OMR
MFR
MPR
UNFR
FR
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
Capacitance value
1 or higher: [pF]
less than 1
Withstand voltage
No indication: DC50[V]
Others: DC withstand voltage [V]
AC indicated
Electrolytic Capacitors
47/50[Example]: Capacitance value [µF]/withstand voltage[V]
: [kΩ]
: [MΩ]
: Carbon resistor
: Oxide metal film resistor
: Metal film resistor
: Metal plate resistor
: Uninflammable resistor
: Fusible resistor
: [µF]
: AC withstand voltage [V]
(7)Ground symbol
: LIVE side ground
: ISOLATED(NEUTRAL) side ground
: EARTH ground
: DIGITAL ground
5.NOTE FOR REPAIRING SERVICE
This model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : ( ) side GND and the
ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be
taken for the following points.
(1)Do not touch the LIVE side GND or the LIVE side GND and the
ISOLATED(NEUTRAL) side GND simultaneously. if the above
caution is not respected, an electric shock may be caused.
Therefore, make sure that the power cord is surely removed from
the receptacle when, for example, the chassis is pulled out.
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL
side GND or never measure with a measuring apparatus measure
with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND
and ISOLATED(NEUTRAL) side GND at the same time.
If the above precaution is not respected, a fuse or any parts will be broken.
Since the circuit diagram is a standard one, the circuit and
circuit constants may be subject to change for improvement
without any notice.
NOTE
Due improvement in performance, some part numbers show
in the circuit diagram may not agree with those indicated in
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.