JVC LT-42DP8 BG-BJ, LT-42D80BU Schematic
SERVICE MANUAL
INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION
YA54520078SERVICE MANUAL
LT-42DP8BG/P,
LT-42DP8BJ
LT-42P80BU
/P,
/P
BASIC CHASSIS
FL5
COPYRIGHT © 2007 Victor Company of Japan, Limited
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
COPYRIGHT © 2007 Victor Company of Japan, Limited
No.YA545
2007/8
SPECIFICATION
Items
Dimensions ( W × H × D ) 103.0 cm × 71.9 cm × 29.6 cm [Included stand]
Mass 28.5 kg [Included stand]
Power Input AC220V - AC240 V, 50 Hz
Power Consumption 220 W (Standby: 0.5 W) 214 W (Standby: 0.5 W)
TV RF System Analog CCIR (I) CCIR (B/G, I, D/K, L)
Colour System PAL, NTSC 3.58/4.43 [EXT only] PAL, SECAM, NTSC 3.58/4.43 [EXT only]
Stereo System NICAM (I) NICAM (B/G, I, D/K, L), A2 (B/G, D/K)
Receiving
Frequency
Intermediate
Frequency
Colour Sub
Carrier Frequency
Teletext System Analog FLOF (Fastext level 2.5) /
LCD panel 42V-inch wide aspect (16 : 9)
Screen Size Diagonal: 105 cm (H: 93.0 cm × V: 52.3 cm)
Display Pixels Horizontal: 1366 dots × Vertical: 768 dots (W-XGA)
Audio Power Output 10 W + 10 W
Speaker 5.5 cm × 20.0 cm, oval type × 2 (Oblique Cone)
Aerial terminal (VHF/UHF) 75 Ω unbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2
EXT-3 (Input) S-Video Mini-DIN 4 pin × 1
EXT-4 (Input) Component Video
625p / 525p / 625i / 525i
Digital input
[DIGITAL-IN 1/2]
PC (RGB) Input D-sub 3-row 15pin × 1
Audio Output 500 mV (rms), Low impedance, RCA pin jack × 2
Digital Audio Optical Output Digital SPDIF × 1--Headphone 3.5 mm stereo mini jack × 1
Remote Control Unit RM-C1911 (AA/R6 dry cell battery × 2)
SECAM --- 4.40625MHz / 4.25MHz
750p / 1125i
Video / Audio HDMI 2-row 19pin connector × 2
103.0 cm × 67.2 cm × 12.2 cm [TV only]
26.4 kg [TV only]
Digital DVB-T ---
Analog UHF: 470 MHz - 862 MHz VHF: 47MHz - 470MHz
Digital UHF:470 MHz - 854 MHz UHF:174 MHz - 230 MHz
VIF 38.9MHz (I) 38.9MHz (B/G, I, D/K, L)
SIF 32.9MHz (6.0MHz:I) 33.4MHz (5.5MHz:B/G)
PAL 4.43MHz
NTSC 3.58MHz / 4.43MHz
WST(World Standard system)
Digital MHEG 5 UK profile EBU TEXT ---
Y: 1 V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286 V (p-p) (Burst signal), 75 Ω
Video 1 V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 1
Audio 500 mV (rms), High impedance, RCA pin jack × 2
RCA pin jack × 3
Y: 1 V (p-p) (Sync signal: ±0.35V(p-p), 3-value sync.), 75Ω / Pb/Pr: ±0.35V(p-p), 75 Ω
Y: 1 V (p-p), Positive (Negative sync.), 75 Ω / Cb/Cr: 0.7V(p-p), 75 Ω
Audio 500 mV(rms) (-4dBs), high impedance, RCA pin jack × 2
(Digital-input terminal is not compatible with picture signals of personal computer)
R/G/B : 0.7V (p-p), 75Ω
HD / VD : 1V (p-p) to 5V (p-p), high impedance
< Available signal >
VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz)
XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)
LT-42DP8BJ/P LT-42DP8BG/P LT-42P80BU/P
UHF: 470 MHz - 862 MHz
CATV: 116MHz - 172MHz / 220MHz - 469MHz
UHF:470 MHz - 862 MHz
32.9MHz (6.0MHz:I)
32.4MHz (6.5MHz:D/K)
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
1.1 SAFETY 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
1.2 SAFETY 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)
1.3 INSTALLATION
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 mm 50
*Diagram differs from actual appearance.
mm
150 mm 50 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.
1.4 HANDLING 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
1.4.2 OPTICAL 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)
2.1 SYSTEM 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
2.2 FEATURES
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.
2.3 MAIN DIFFERENCE LIST
Item LT-42DP8BJ/P LT-42DP8BG/P LT-42P80BU/P
Digital Tuner YES ← NO
Teletext (Digital) MHEG 5 UK profile EBU TEXT NO
Indoor ANT Power Supply YES ← NO
Digital Audio Optical Output YES ← NO
Remote Control Unit RM-C1911 ← RM-C1910
(No.YA545)1-7
2.4 21-PIN EURO CONNECTOR (SCART) : EXT-1 / EXT-2
Pin No. Signal designation Matching value EXT-1 EXT-2
1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT)
2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2)
3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT)
4 AUDIO GND Used Used
5 GND (B) Used Used
6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2)
7 B input 700mV
8 FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance
, 75Ω Used Used
(B-W)
Used Used
9 GND (G) Used Used
10 SCL / T-V LINK Not used Used (SCL2 / TV-LINK)
11 G input 700mV
, 75Ω Used Used
(B-W)
12 SDA Not used Used (SDA2)
13 GND (R) Used Used
14 GND (YS) Used Not used
15 R / C input R : 700mV
C : 300mV
(B-W)
(P-P)
, 75Ω
, 75Ω
Used (C1/R) Used (C2/R)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75Ω Used Used
17 GND (VIDEO output) Used Used
18 GND (VIDEO input) Used Used
19 VIDEO output 1V
20 VIDEO / Y input 1V
(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT)
(P-P)
(Negative sync), 75Ω Used (Y1/V) Used (Y2/V)
(P-P)
21 COMMON GND Used Used
(P-P= Peak to Peak, B-W= Blanking to white peak)
[Pin assignment]
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
1-8 (No.YA545)
2.5 TECHNICAL 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.
2.5.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
Item Specifications
Maximum dimensions ( W × H × D ) 98.3 cm × 57.6 cm × 5.2 cm
Weight 15.0 kg
Effective screen size Diagonal: 1050 mm (H: 930.25 mm × V: 523.01 mm)
Aspect ratio 16 : 9
Drive device / system a-Si-TFT active matrix system
Resolution Horizontally 1366 × Vertically 768 × RGB <W-XGA> 3147264 dots in total
Pixel pitch (pixel size) Horizontally: 0.681 mm, Vertically: 0.681 mm
Displayed colour 16777216 colours 256 colours for R G and B
Brightness 500cd/m
2
Contrast ratio 1500 : 1
Response time (Tr) less than 8 ms
View angle (Horizontally) 178°
View angle (Vertically) 178°
Surface polarizer Anti-Glare type Low reflective coat
Colour filter Vertical stripe
Backlight Cold cathode fluorescent lamp × 20
Power supply voltage in LCD 12 V
Power supply voltage in inverter 24 V
Panel interface system LVDS (Low Voltage Differential Signaling)
2.5.1.2 PIXEL 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
Pin Pin name I/O Function Pin Pin name I/O Function
1 TCK O Test purpose 65 D2 I/O Program ROM data for main CPU
2 TMS I Test purpose 66 D12 I/O Program ROM data for main CPU
3 TDI I Test purpose 67 D10 I/O Program ROM data for main CPU
4 TDO O Test purpose 68 VSS33 - GND
5 P2.8 I Input for HDMI CEC 69 VDD33 I 3.3V
6 P2.9 O Blue for OSD 70 D4 I/O Program ROM data for main CPU
7 P2.10 O Blue for OSD 71 D3 I/O Program ROM data for main CPU
8 P2.11 O Blue for OSD 72 D11 I/O Program ROM data for main CPU
9 P2.12 O Blue for OSD 73 RSTIN I Reset
10 P2.13 O Blue for OSD 74 POWER O Sleep state release for chassis CPU [Release : L]
11 P2.14 I TV-LINK data 75 P3.1 O Reset for digital tuner unit
12 P2.15 O Request for chassis CPU communication 76 REMOCON I Remote control
13 VSS33 - GND 77 P3.3 I Clock for OSD
14 VDD33 I 3.3V 78 P3.4 O Red for OSD
15 P4.5 O TV-LINK data 79 P3.5 O Red for OSD
16 A20 O Program ROM address for main CPU 80 P3.6 O Red for OSD
17 A19 O Program ROM address for main CPU 81 P3.7 O Red for OSD
18 A18 O Program ROM address for main CPU 82 MTST I/O Data transmission for chassis CPU communication
19 A17 O Program ROM address for main CPU 83 MTSR I/O Data receive for chassis CPU communication
20 VSS25 - GND 84 VSS33 - GND
21 VDD25 I 2.5V 85 VDD33 I 3.3V
22 A16 O Program ROM address for main CPU 86 VSS25 - GND
23 A8 O Program ROM address for main CPU 87 VDD25 I 2.5V
24 A7 O Program ROM address for main CPU 88 TXD0 I/O Data transmission for digital tuner unit
25 A9 O Program ROM address for main CPU 89 RXD0 I/O Data receive for digital tuner unit
26 A6 O Program ROM address for main CPU 90 P3.12 O Red for OSD
27 A5 O Program ROM address for main CPU 91 CLK O Clock for chassis CPU communication
28 A10 O Program ROM address for main CPU 92 P3.15 O Output for HDMI CEC
29 A11 O Program ROM address for main CPU 93 P5.14 O Green for OSD
30 A12 O Program ROM address for main CPU 94 P5.15 O Green for OSD
31 VSS33 - GND 95 TRIG_IN O Green for OSD
32 VDD33 I 3.3V 96 TRIG_OUT O Green for OSD
33 A4 O Program ROM address for main CPU 97 P6.2 O Green for OSD
34 A3 O Program ROM address for main CPU 98 P6.3 I/O I
35 A2 O Program ROM address for main CPU 99 P6.4 I/O I
36 A1 O Program ROM address for main CPU 100 P6.5 O Sync signal select for OSD / Teletext
37 A0 O Program ROM address for main CPU 101 IRQ O Interrupt request for digital tuner unit
38 A13 O Program ROM address for main CPU 102 VSYNC I Vertical sync
39 ARAS/A14 O Program ROM address for main CPU 103 HSYNC I Horizontal sync
40 CAS/A15 O Program ROM address for main CPU 104
41 VSS33 - GND 105 BLANK O Ys for OSD / Teletext
42 VDD33 I 3.3V 106 VDD33 I 3.3V
43 MEMCLK O Clock for memory 107 VSS33 - GND
44 CSSDRAM O Chip select for memory 108 XTAL1 I 6MHz for system clock
45 CLKEN O Clock enable for memory 109 XTAL2 O 6MHz for system clock
46 CSROM O Chip select for memory 110 VSSA - GND
47 RD O Read for memory 111 VDDA I 2.5V
48 UDQM O Control buffer of memory 112 R O R for Teletext
49 LDQM O Control buffer of memory 113 G O G for Teletext
50 WR O Write for memory 114 B O B for Teletext
51 D15 I/O Program ROM data for main CPU 115 VSSA - GND
52 VSS33 - GND 116 VDDA I 2.5V
53 VDD33 I 3.3V 117 CVBS2 I Not used
54 D7 I/O Program ROM data for main CPU 118 VSSA - GND
55 D0 I/O Program ROM data for main CPU 119 VDDA I 2.5V
56 D14 I/O Program ROM data for main CPU 120 CVBS1B I Not used
57 D8 I/O Program ROM data for main CPU 121 CVBS1A I Video for Teletext
58 D6 I/O Program ROM data for main CPU 122 VSSA - GND
59 D1 I/O Program ROM data for main CPU 123 VDDA I 2.5V
60 VSS33 - GND 124 KEY1 I Key scan data 1 [ON : H]
61 VDD33 I 3.3V 125 KEY2 I Key scan data 2 [ON : H]
62 D13 I/O Program ROM data for main CPU 126 MECA_SW I Main power ON / OFF control [ON : L]
63 D9 I/O Program ROM data for main CPU 127
64 D5 I/O Program ROM data for main CPU 128 TMODE I 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
3.1 DISASSEMBLY 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
3.2 MEMORY 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 PWB Main content of data
IC7201
IC7602
48-pin DIGITAL PWB Program (Video process) of IC6001(System CPU) is memorized.
8-pin DIGITAL PWB Setting 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 items Settings Item No.
Video system setting Adjust S001 - S009
(Not used) Fixed T001 - T003
(Not used) Fixed M001 - M224
(Not used) Fixed F001 - F002
(Not used) Fixed D001
(Not used) Fixed Z001
3.2.4 SETTINGS OF FACTORY SHIPMENT
3.2.4.1 BUTTON OPERATION
Setting item Setting position
POWER Off
CHANNEL PR1
VOLUME 10
TV/AV TV
3.2.4.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position
CHANNEL PR1
VOLUME 10
ZOOM Auto
SUB PICTURE EXT-1
SUB POWER Off
1-14 (No.YA545)
3.2.4.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE
Setting item Setting position
Picture Mode Bright
Colour Temp. Cool
Features
Super Digipure Auto
Movie Theatre Auto
Colour Management On
Picture Management On
Smart Picture On
MPEG Noise Reduction Off
Colour System Main Depends PR
Sub Auto
4:3 Auto Aspect Panoramic
(2) SOUND
Setting item Setting position
Stereo / I•ii Stereo Sound
MaxxAudio Low
Balance Centre
Voice Enhancer Off
(3) FEATURES
Setting item Setting position
Sleep Timer Off
Child Lock Off (ID:0000)
Appearance Type A
Blue Back On
Favorite Setting Blank
Illumination Bright
Power Lamp On
Eco Mode Off
(4) SET UP
Setting item Setting position
Auto Program Tv Channel Automatically Set
Edit/manual -
Language English
Decoder (Ext-2) Off
Component Auto Select Off
HDMI HDMI CEC: On
Size: Auto
Audio: Auto
Attenuator Off
PC Position Centre
Auto Demonstration Off
Ext Setting
S-IN Blank
ID Blank
Dubbing Ext-1 → Ext-2
(5) DTV [LT-42DG8 series only]
[For UK]
Setting item Setting position
Configuration
Audio Language English
Subtitle Language English
Favourite Mode Off
Menu Lock Disable
[For other country]
Setting item Setting position
Configuration
Country --- *
Menu Language --- *
Audio Language --- *
Subtitle Language --- *
Teletext Language --- *
EPG Language --- *
Enter PIN Code 0000
Favourite Mode Off
Maturity Rating Off
*It differs according to the language that the user selected.
[For All country]
Setting item Setting position
Setup
Digital Audio Output PCM
Banner Duration 2sec
Receiver Upgrade Auto
Common Interface ---
Antenna Power Off
(No.YA545)1-15
3.3 REPLACEMENT 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
4.1 ADJUSTMENT 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.
4.2 PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Setting item Settings position
Picture Mode Standard
Picture Adjustments Centre
Colour Temp. Normal
Super Digipure Auto
Movie Theatre Auto
Colour Management On
Picture Management On
Zoom Full
4.3 MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator) [PAL]
• Remote control unit
4.5 BASIC 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
4.4 ADJUSTMENT 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".
SIGNAL SYSTEM
ZOOM MODE
PICTURE MODE
COLOUR TEMP.
(1) SIGNAL SYSTEM
The signal displayed on the screen is displayed.
PAL50 : PAL50Hz (Composite / S-video)
PAL60 : PAL60Hz (Composite / S-video)
SECAM : SECAM
NTSC3 : NTSC3.58
NTSC4 : NTSC4.43
525I : 525i (Component)
525P : 525p
625I : 625i (Component)
625P : 625p
1125I5 : 1125i 50Hz
1125I6 : 1125i 60Hz
RGB5 : RGB 525i
RGB6 : RGB 625i
PCVGA : PC (VGA)
PCXGA : PC (XGA)
D625I : DVB-T 625i
H525I : HDMI 525i
H525P : HDMI 525p
H625I : HDMI 625i
H625P : HDMI 625p
H750P : HDMI 750p
H125I5 : HDMI 1125i 50Hz
H125I6 : HDMI 1125i 60Hz
--- : OTHER
(2) ZOOM MODE
State of the SCREEN SIZE or MULTI PICTURE is displayed.
SINGLE SCREEN
FULL : FULL
PANO : PANORAMIC
1609 : 16:9 ZOOM
1609S : 16:9 ZOOM SUBTITLE
1409 : 14:9 ZOOM
REGU : REGULAR
MULTI SCREEN
M2 : 2-pictures multi
M12 : 12-pictures multi
(6) SETTING ITEM NO.
Setting item numbers are displayed. The setting item numbers
to be displayed are listed below.
Item No. Setting item
S001 - S009 Video system setting
T001 - T003 (NOT USED)
M001 - M224 (NOT USED)
F001 - F002 (NOT USED)
D001 (NOT USED)
Z001 (NOT USED)
(7) SETTING VALUE (DATA)
The SETTING VALUE is displayed.
4.5.6 CHANGE AND MEMORY OF SETTING VALUE
SELECTION OF SETTING ITEM
• [FUNCTION /] key.
For scrolling up / down the setting items.
S001...S009 ↔ T001...T003 ↔ M001...M224 ↔
F001...F002 ↔ D001 ↔ Z001↔return to S001
CHANGE OF SETTING VALUE (DATA)
• [FUNCTION /] key.
For scrolling up / down the setting values.
MEMORY OF SETTING VALUE (DATA)
Changed setting value is memorized by pressing [MUTING]
key.
1-18 (No.YA545)
4.6 INITIAL 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.
4.6.1 VIDEO SYSTEM SETTING
Item No. Item Variable range Setting value
S001 R DRIVE 0 - 255 137
S002 G DRIVE 0 - 255 137
S003 B DRIVE 0 - 255 137
S004 RESERV 0 - 255 --S005 2D YC 0 - 255 0
S006 RESERV 0 - 255 --S007 RESERV 0 - 255 --S008 RESERV 0 - 255 --S009 RESERV 0 - 255 ---
4.6.2 NOT USED ITEM (All values are Fixed values)
Item No. Item Variable range Setting value
T001 RESERV 0 - 15 ---
T002 RESERV 0 - 63 ---
T003 RESERV 0 - 63 ---
M001 1E00 00 - FF ---
M002 1E01 00 - FF ---
M003 1E02 00 - FF ---
M004 1E03 00 - FF ---
M005 1E04 00 - FF ---
M006 1E05 00 - FF ---
M007 1E06 00 - FF ---
M008 1E07 00 - FF ---
M009 1E08 00 - FF ---
M010 1E09 00 - FF ---
M011 1E0A 00 - FF ---
M012 1E0B 00 - FF ---
M013 1E0C 00 - FF ---
M014 1E0D 00 - FF ---
M015 1E0E 00 - FF ---
M016 1E0F 00 - FF ---
M017 1E10 00 - FF ---
M018 1E11 00 - FF ---
M019 1E12 00 - FF ---
M020 1E13 00 - FF ---
M021 1E14 00 - FF ---
M022 1E15 00 - FF ---
M023 1E16 00 - FF ---
M024 1E17 00 - FF ---
M025 1E18 00 - FF ---
M026 1E19 00 - FF ---
M027 1E1A 00 - FF ---
M028 1E1B 00 - FF ---
M029 1E1C 00 - FF ---
M030 1E1D 00 - FF ---
M031 1E1E 00 - FF ---
Item No. Item Variable range Setting value
M032 1E1F 00 - FF ---
M033 1E20 00 - FF ---
M034 1E21 00 - FF ---
M035 1E22 00 - FF ---
M036 1E23 00 - FF ---
M037 1E24 00 - FF ---
M038 1E25 00 - FF ---
M039 1E26 00 - FF ---
M040 1E27 00 - FF ---
M041 1E28 00 - FF ---
M042 1E29 00 - FF ---
M043 1E2A 00 - FF ---
M044 1E2B 00 - FF ---
M045 1E2C 00 - FF ---
M046 1E2D 00 - FF ---
M047 1E2E 00 - FF ---
M048 1E2F 00 - FF ---
M049 1E30 00 - FF ---
M050 1E31 00 - FF ---
M051 1E32 00 - FF ---
M052 1E33 00 - FF ---
M053 1E34 00 - FF ---
M054 1E35 00 - FF ---
M055 1E36 00 - FF ---
M056 1E37 00 - FF ---
M057 1E38 00 - FF ---
M058 1E39 00 - FF ---
M059 1E3A 00 - FF ---
M060 1E3B 00 - FF ---
M061 1E3C 00 - FF ---
M062 1E3D 00 - FF ---
M063 1E3E 00 - FF ---
M064 1E3F 00 - FF ---
M065 1E40 00 - FF ---
M066 1E41 00 - FF ---
M067 1E42 00 - FF ---
M068 1E43 00 - FF ---
M069 1E44 00 - FF ---
M070 1E45 00 - FF ---
M071 1E46 00 - FF ---
M072 1E47 00 - FF ---
M073 1E48 00 - FF ---
M074 1E49 00 - FF ---
M075 1E4A 00 - FF ---
M076 1E4B 00 - FF ---
(No.YA545)1-19
Item No. Item Variable range Setting value
M077 1E4C 00 - FF ---
M078 1E4D 00 - FF ---
M079 1E4E 00 - FF ---
M080 1E4F 00 - FF ---
M081 1E50 00 - FF ---
M082 1E51 00 - FF ---
M083 1E52 00 - FF ---
M084 1E53 00 - FF ---
M085 1E54 00 - FF ---
M086 1E55 00 - FF ---
M087 1E56 00 - FF ---
M088 1E57 00 - FF ---
M089 1E58 00 - FF ---
M090 1E59 00 - FF ---
M091 1E5A 00 - FF ---
M092 1E5B 00 - FF ---
M093 1E5C 00 - FF ---
M094 1E5D 00 - FF ---
M095 1E5E 00 - FF ---
M096 1E5F 00 - FF ---
M097 1E60 00 - FF ---
M098 1E61 00 - FF ---
M099 1E62 00 - FF ---
M100 1E63 00 - FF ---
M101 1E64 00 - FF ---
M102 1E65 00 - FF ---
M103 1E66 00 - FF ---
M104 1E67 00 - FF ---
M105 1E68 00 - FF ---
M106 1E69 00 - FF ---
M107 1E6A 00 - FF ---
M108 1E6B 00 - FF ---
M109 1E6C 00 - FF ---
M110 1E6D 00 - FF ---
M111 1E6E 00 - FF ---
M112 1E6F 00 - FF ---
M113 1E70 00 - FF ---
M114 1E71 00 - FF ---
M115 1E72 00 - FF ---
M116 1E73 00 - FF ---
M117 1E74 00 - FF ---
M118 1E75 00 - FF ---
M119 1E76 00 - FF ---
M120 1E77 00 - FF ---
M121 1E78 00 - FF ---
M122 1E79 00 - FF ---
M123 1E7A 00 - FF ---
M124 1E7B 00 - FF ---
M125 1E7C 00 - FF ---
M126 1E7D 00 - FF ---
Item No. Item Variable range Setting value
M127 1E7E 00 - FF ---
M128 1E7F 00 - FF ---
M129 1E80 00 - FF ---
M130 1E81 00 - FF ---
M131 1E82 00 - FF ---
M132 1E83 00 - FF ---
M133 1E84 00 - FF ---
M134 1E85 00 - FF ---
M135 1E86 00 - FF ---
M136 1E87 00 - FF ---
M137 1E88 00 - FF ---
M138 1E89 00 - FF ---
M139 1E8A 00 - FF ---
M140 1E8B 00 - FF ---
M141 1E8C 00 - FF ---
M142 1E8D 00 - FF ---
M143 1E8E 00 - FF ---
M144 1E8F 00 - FF ---
M145 1E90 00 - FF ---
M146 1E91 00 - FF ---
M147 1E92 00 - FF ---
M148 1E93 00 - FF ---
M149 1E94 00 - FF ---
M150 1E95 00 - FF ---
M151 1E96 00 - FF ---
M152 1E97 00 - FF ---
M153 1E98 00 - FF ---
M154 1E99 00 - FF ---
M155 1E9A 00 - FF ---
M156 1E9B 00 - FF ---
M157 1E9C 00 - FF ---
M158 1E9D 00 - FF ---
M159 1E9E 00 - FF ---
M160 1E9F 00 - FF ---
M161 1EA0 00 - FF ---
M162 1EA1 00 - FF ---
M163 1EA2 00 - FF ---
M164 1EA3 00 - FF ---
M165 1EA4 00 - FF ---
M166 1EA5 00 - FF ---
M167 1EA6 00 - FF ---
M168 1EA7 00 - FF ---
M169 1EA8 00 - FF ---
M170 1EA9 00 - FF ---
M171 1EAA 00 - FF ---
M172 1EAB 00 - FF ---
M173 1EAC 00 - FF ---
M174 1EAD 00 - FF ---
M175 1EAE 00 - FF ---
M176 1EAF 00 - FF ---
1-20 (No.YA545)
Item No. Item Variable range Setting value
M177 1EB0 00 - FF ---
M178 1EB1 00 - FF ---
M179 1EB2 00 - FF ---
M180 1EB3 00 - FF ---
M181 1EB4 00 - FF ---
M182 1EB5 00 - FF ---
M183 1EB6 00 - FF ---
M184 1EB7 00 - FF ---
M185 1EB8 00 - FF ---
M186 1EB9 00 - FF ---
M187 1EBA 00 - FF ---
M188 1EBB 00 - FF ---
M189 1EBC 00 - FF ---
M190 1EBD 00 - FF ---
M191 1EBE 00 - FF ---
M192 1EBF 00 - FF ---
M193 1EC0 00 - FF ---
M194 1EC1 00 - FF ---
M195 1EC2 00 - FF ---
M196 1EC3 00 - FF ---
M197 1EC4 00 - FF ---
M198 1EC5 00 - FF ---
M199 1EC6 00 - FF ---
M200 1EC7 00 - FF ---
M201 1EC8 00 - FF ---
M202 1EC9 00 - FF ---
M203 1ECA 00 - FF ---
Item No. Item Variable range Setting value
M204 1ECB 00 - FF ---
M205 1ECC 00 - FF ---
M206 1ECD 00 - FF ---
M207 1ECE 00 - FF ---
M208 1ECF 00 - FF ---
M209 1ED0 00 - FF ---
M210 1ED1 00 - FF ---
M211 1ED2 00 - FF ---
M212 1ED3 00 - FF ---
M213 1ED4 00 - FF ---
M214 1ED5 00 - FF ---
M215 1ED6 00 - FF ---
M216 1ED7 00 - FF ---
M217 1ED8 00 - FF ---
M218 1ED9 00 - FF ---
M219 1EDA 00 - FF ---
M220 1EDB 00 - FF ---
M221 1EDC 00 - FF ---
M222 1EDD 00 - FF ---
M223 1EDE 00 - FF ---
M224 1EDF 00 - FF ---
F001 DD 0 - 1 ---
F002 RAM REF 0 - 1 ---
D001 RESERV 0 - 255 ---
Z001 RESERV 0 - 255 ---
4.7 ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
Item
WHITE
BALANCE
(HIGHLIGHT)
Measuring
instrument
Remote
control unit
Signal
generator
Test point Adjustment part Description
[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
5.1 SELF 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)
<Page 1 of screen>
Detection item Display Detection content
Low bias line short
protection
---- FAN ---- ---- ----
---- AUD ---- ---- ----
Devices on the ANALOG
PWB
Devices on the DIGITAL
PWB
<Page 2 of screen>
Detection item Display Detection content
---- TMP ---- ---- ----
---- L1 ---- ---- ----
---- L2 ---- ---- ----
---- DDT ---- ---- ----
---- FAN ---- ---- ----
---- LC ---- ---- ----
---- IRS ---- ---- ----
LOB [LT-42DP8BG/P, LT-42DP8BJ/P]
Confirm the operation of the low bias (5V / 12V /
13.5V) protection circuit.
, Q9601, Q9703 [DC-DC PWB]
Q9401
[LT-42P80BU/P]
Confirm the operation of the low bias (5V / 12V /
13.5V) protection circuit.
, Q9601, Q9801 [DC-DC PWB]
Q9401
ANA Confirmation of reply of ACK signal which uses
I2C communication.
, IC102, IC601, IC3501, TU3001
IC101
[ANALOG PWB]
DIG Confirmation of reply of ACK signal which uses
I2C communication.
IC5001
[DIGITAL PWB]
Diagnosis
signal (line)
LB_PRO Detection starts 3 seconds after
the power is turned on. If error
continues between 200 ms the
power is turned off.
SDA Detection 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.
SDA Detection 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 error POWER LED flash cycle
Low bias line short protection POWER 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
(No.YA545)
Printed in Japan
VPT
SCHEMATIC DIAGRAMS
INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION
YA494200611
LT-42DP8BG/P,
LT-42DP8BJ
LT-42P80BU
CD-ROM No.SML200708
/P,
/P
BASIC CHASSIS
FL5
COPYRIGHT © 2007 VICTOR COMPANY OF JAPAN, LIMITED
No.YA545
2007/8
LT-42DP8BG/P, LT-42DP8BJ/P, LT-42P80BU/P
STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The components identified by the symbol 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.
: Original setting position
when shipped
: DC 20kΩ/V
: H
: V
: Othters
: All DC voltage values
20µs / div
5ms / div
Sweeping time is
specified
3.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board
: R209
R209
Type
No indication
MM
PP
MPP
MF
TF
BP
TAN
(3)Coils
No unit
Others
(4)Power Supply
Respective voltage values are indicated
(5)Test point
: Test point
(6)Connecting method
: Ceramic capacitor
: Metalized mylar capacitor
: Polypropylene capacitor
: Metalized polypropylene capacitor
: Metalized film capacitor
: Thin film capacitor
: Bipolar electrolytic capacitor
: Tantalum capacitor
: [µH]
: As specified
: B1
: 9V
: Connector
: Receptacle
: Only test point display
: Wrapping or soldering
: B2 (12V
: 5V
)
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit : [Ω]
K
M
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.
)
(No.YA545)2-1
CONTENTS
SEMICONDUCTOR SHAPES ...................................................................... 2-2
WIRING DIAGRAM ........................................................................................2-3
BLOCK DIAGRAM ........................................................................................ 2-5
CIRCUIT DIAGRAMS .................................................................................... 2-7
ANALOG PWB CIRCUIT DIAGRAM ........................................................................................................... 2-7
DIGITAL PWB CIRCUIT DIAGRAM .......................................................................................................... 2-19
POWER PWB CIRCUIT DIAGRAM .......................................................................................................... 2-53
LED PWB CIRCUIT DIAGRAM ................................................................................................................. 2-59
SW PWB CIRCUIT DIAGRAM ................................................................................................................. 2-61
DC-DC PWB CIRCUIT DIAGRAM ............................................................................................................. 2-63
PATTERN DIAGRAMS .............................................................................. 2-65
ANALOG PWB PATTERN ........................................................................................................................ 2-65
DIGITAL PWB PATTERN ......................................................................................................................... 2-67
POWER PWB PATTERN .......................................................................................................................... 2-71
LED PWB PATTERN ................................................................................................................................ 2-73
SW PWB PATTERN ................................................................................................................................ 2-73
DC-DC PWB PATTERN ............................................................................................................................ 2-74
VOLTAGE CHARTS .................................................................................. 2-75
WAVEFORMS ............................................................................................ 2-77
USING P.W. BOARD
P.W.B ASS㵭Y name LT-42DP8BG/P LT-42DP8BJ/P
ANALOG P.W. BOARD
SW P.W. BOARD
LED P.W. BOARD
POWER P.W. BOARD
DC-DC P.W. BOARD
DIGITAL P.W. BOARD
SFL-1251A-U2
SFL-7215A-U2
SFL-8721A-U2
SFL-9080A-U2
SFL-9188A-U2
LCA10737-18A(SFL-0D564A)
SFL-1252A-U2
SFL-8724A-U2
SFL-9193A-U2
LCA10737-19A(SFL-0D565A)
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW
E
C
B
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
OUT
E
IN
ECB
IN OUTE
B
(G)E(S)C(D)
1 N
ECB
ECB
1 N
CHIP TR
1
LT-42P80BU/P
C
BE
N
CHIP IC
N
1
2-2(No.YA545)
TOP VIEW
1
N
WIRING DIAGRAM
SPEAKER (R) SPEAKER (L)
CONTROL PWB
LCD PANEL UNIT
INVERTER PWB
(MASTER SIDE)
INVERTER PWB
(SLAVE SIDE)
TOP
[only LT-42DP8 series]
CN0SR
14
ANALOG PWB
CN0UD
101
CN0SL
[only LT-42DP8 series]
13
CN10F
CN0UV
CN001
CN002
CN00U
CN00R
CN00H
12
123
131
501401
101
91
TOP
CN00H
123
150140
DC-DC PWB
CN001
CN002
CN0DC
115
CN0DC
[only LT-42DP8 series]
DIGITAL PWB
CN00A
15 1
115
CN0ID
CN000W
CN0LV1
TOP
16
112
41 1
15 1
41 21
CN00A
CN00F
CN00W
CN00P
114
CN00Q
110
POWER PWB
FRONT
TOP
SW PWB
CN200R
ANALOG
TUNER
TOP
PL302
16113110
PL301PL103
F9001
250V/6.3A
CN0PW
21
TOP
POWER CORD
DIGITAL TUNER MODULE PWB
91
TOP
[only LT-42DP8 series]
LED PWB
110
CN100U
2-4(No.YA545)(No.YA545)2-3
BLOCK DIAGRAM
EXT-1
EXT-2
S-VIDEO
EXT-3
V
L/R
PC INPUT
TU3001
UHF/VHF TUNER
TV_MAIN
IC105
VIDEO AMP
MON_TV
TV_L/R
R1/G1/B1
Y1/C1
V1
L1/R1
R2/G2/B2
Y2/C2
V2
L2/R2
MON_V
MON_L/R
Y3/C3
V3
L3/R3
PC_R/G/B
TV_SIF
TV_MONO
IC3501
DEC_Y
DTU_VIN
V1_VIN
V2_VIN
V3_VIN
V1_YIN
V2_YIN
V3_YIN
MULTI SOUND PROCESS
AGC
A-D
DEMOD.
VIDEO/AUDIO SELECT
IC101
MATRIX
Y/C
MIX
D-A
MAIN_VY
SUB_VY
TV_L/R
EXT-5
EXT-6
[only LT-42DP8 series]
HDMI
HDMI
DIGITAL
TUNER
MODULE
HDMI
RECEIVE
IC7602
MEMORY
DTU_Y/Cb/Cr
DTU_VIN
DTU_LIN/RIN
DV1_R0-7
DV1_Y0-7
DV1_B0-7
DIN_DL/DR
TEXT_R/G/B
MAIN_CCD
IC7301
MAIN CPU
UKD_TX
UKD_RX
OSDR1-5/
OSDG1-5/
OSDB1-5
IC6001
YC SEPARATE/
CHROMA DEMODURATE/
FORMAT CONVERT/
NOISE REDUCT/
RGB PROCESS/
OSD COMPOSITION/
SUB CPU
SUB_VY
YM_IN/
BYM_IN/
RYM_IN
MI_TX/
MI_RX/
MI_CLK
A-D CONVERT
A-D CONVERT
YC SEPARATE/
CHROMA DEMOD./
FORMAT CONVERT/
NOISE REDUCT
SD_DQ1-32
A0-21
D0-15
A0-21
D0-15
SUB CPU
IC6101
FRAME
MEMORY
IC7201
PROGRAM
MEMORY
IC7203
PROGRAM
MEMORY
IC5002
IC5003
FRAME
MEMORY
ADRS
IC5001
FRAME INTERPOLATE/
LCD CONTROL/
LVDS DRIVE
RGB
PROCESS
OSD
MIX
DIGITAL PWB
DQ
LVR0-7/
LVG0-7/
LVB0-7
RE(0)P/N
RE(1)P/N
RE(2)P/N
RE(3)P/N
RECLK+/-
RO(0)P/N
RO(1)P/N
RO(2)P/N
RO(3)P/N
ROCLK+/-
LCD PANEL
Pb/Cb
EXT-4
Pr/Cr
L/R
AUDIO OUT L/R
Y
Y4/CB4/CR4
L4/R4
MON_V
IC104
VIDEO
AMP
V1_CIN
V2_CIN
V3_CIN
DTU_LIN/RIN
DIN_L/R
TV_L/R
V1_LIN/RIN
V2_LIN/RIN
V3_LIN/RIN
V4_LIN/RIN
FIX_L/R
MON_L/R
MON_VOUT
Y/C
MIX
MAIN_C
SUB_C
MAIN_L/R
MAIN_VY
PC_G
V4_Y
DTU_Y
TEXT_G
SUB_C
PC_B
V4_Cb
DTU_Cb
TEXT_B
MAIN_C
PC_R
V4_Cr
DTU_Cr
TEXT_R
IC102
VIDEO SELECT
G1
G2
B1
B2
R1
R2
IC601
CONVERT
Y_OUT
BY_OUT
RY_OUT
AUDIO CONTROL
A-D
BASS
BOOST
ANALOG PWB
STEREO
BOOST
TREBLE
BOOST
EQUALIZE
VOLUME
D-A
CONVERT
IC751
HEADPHONE
AMP
AMP_L/R
AUDIO OUT
IC6001
KEY_1/2
MECA_SW
HP_L/R
POWER_LED
REMOCON
EE_CDS
SW PWB
CONTROL
SWITCH
S7801㨪S7806
S7807
J7101
LED PWB
D8771/
D8772
POWER
IC8772
IR RECEIVE
IC8771
E.E. SENSOR
SPEAKER (L)
SPEAKER (R)
POWER
HEADPHONE
(No.YA545)2-5 2-6(No.YA545)