JVC LT-32A80SU, LT-26A80ZU, LT-26DA8ZU, LT-26DT8ZJ, LT-32A80ZU Service Manual

SERVICE MANUAL

LCD INTEGRATED DIGITAL TELEVISION

YA50920074SERVICE MANUAL

LT-26A80SU, LT-26A80ZU, LT-26DA8BJ,
LT-26DA8SJ, LT-26DA8SU, LT-26DA8ZU,
LT-26DT8ZJ, LT-32A80SU, LT-32A80ZU,
LT-32DA8BJ, LT-32DA8SJ, LT-32DA8SU,
LT-32DA8ZU, LT-32DT8ZJ

BASIC CHASSIS

FT3

[A80 series]

COPYRIGHT © 2007 Victor Company of Japan, Limited

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

[DA8 series]
[DT8 series]

TABLE OF CONTENTS

COPYRIGHT © 2007 Victor Company of Japan, Limited

No.YA509

2007/4

SPECIFICATION

Contents

Items

Dimensions ( W × H × D ) 67.2 cm × 51.9 cm × 23.0 cm [Included stand]

67.2 cm × 47.1 cm × 10.7 cm [TV only]

Mass 11.2 kg [Included stand]

10.4 kg [TV only]

Power Input AC220V - AC240 V, 50 Hz

Power Consumption 105 W (Standby: 1.6 W) 116 W (Standby: 1.6 W)

TV RF System Analog CCIR (B/G, I, D/K, L) CCIR (I)

Digital --- DVB-T

Colour System PAL,

SECAM,
NTSC 3.58/4.43 [EXT only]

Stereo System NICAM (B/G, I, D/K, L), A2 (B/G, D/K) NICAM (I)

Receiving
Frequency

Intermediate
Frequency

Colour Sub
Carrier
Frequency

Teletext System Analog FLOF (Fastext level 2.5)

LCD panel 26V-inch wide aspect (16 : 9)

Screen Size Diagonal : 66 cm (H: 57.6 cm × V: 32.4 cm)
Display Pixels Horizontal : 1366 dots × Vertical : 768 dots (W-XGA)

Audio Power Output 6 W + 6 W

Speaker 5.0 cm × 12.0 cm, oval type × 2
Aerial terminal (VHF/UHF) 75 Ω unbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2

EXT-3 (Input) Component Video

625p / 525p / 625i / 525i

EXT-4 / EXT-5
(HDMI Input)

Digital Audio Optical Output --- Digital SPDIF × 1
Headphone 3.5 mm stereo mini jack × 1

Remote Control Unit RM-C1508

Design & specifications are subject to change without notice.

Analog VHF: 47MHz - 470MHz

UHF: 470 MHz - 862 MHz
CATV: 116MHz - 172MHz / 220MHz - 469MHz

Digital --- UHF:

VIF 38.9MHz (B/G, I, D/K, L) 38.9MHz (I)

SIF 33.4MHz (5.5MHz :B/G)

32.9MHz (6.0MHz :I)

32.4MHz (6.5MHz :D/K)

PAL 4.43MHz

SECAM 4.40625MHz / 4.25MHz ---

NTSC 3.58MHz / 4.43MHz

TOP
WST(World Standard system)

Digital --- EBU TEXT MHEG 5 UK profile

RCA pin jack × 3

750p / 1125i

Video/Audio HDMI 2-row 19pin connector × 2

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)

(AA/R6 dry cell battery × 2)

LT-26A80SU
LT-26A80ZU

LT-26DA8SU
LT-26DA8ZU

11.6 kg [Included stand]

10.8 kg [TV only]

177.5 MHz - 858 MHz

RM-C1821

(AA/R6 dry cell battery × 2)

PAL,
NTSC 3.58/4.43 [EXT only]

UHF: 470 MHz - 862 MHz

UHF:

474 MHz - 850 MHz

32.9MHz (6.0MHz :I)

FLOF (Fastext level 2.5)
WST(World Standard system)

LT-26DA8BJ
LT-26DA8SJ

LT-26DT8ZJ

1-2 (No.YA509)

Contents

Items

Dimensions ( W × H × D ) 80.0 cm × 59.1 cm × 23.0 cm [Included stand]

80.0 cm × 54.5 cm × 9.9 cm [TV only]

Mass 13.8 kg [Included stand]

13.0 kg [TV only]

Power Input AC220V - AC240 V, 50 Hz

Power Consumption 114 W (Standby: 1.6 W) 125 W (Standby: 1.6 W)

TV RF System Analog CCIR (B/G, I, D/K, L) CCIR (I)

Digital --- DVB-T

Colour System PAL

SECAM
NTSC 3.58/4.43 [EXT only]

Stereo System NICAM (B/G, I, D/K, L), A2 (B/G, D/K) NICAM (I)

Receiving
Frequency

Intermediate
Frequency

Colour Sub
Carrier
Frequency

Teletext System Analog FLOF (Fastext level 2.5)

LCD panel 32V-inch wide aspect (16 : 9)

Screen Size Diagonal : 80 cm (H: 69.7 cm × V: 39.2 cm)
Display Pixels Horizontal : 1366 dots × Vertical : 768 dots (W-XGA)

Audio Power Output 6 W + 6 W

Speaker 5.0 cm × 12.0 cm, oval type × 2
Aerial terminal (VHF/UHF) 75 Ω unbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) × 2

EXT-3 (Input) Component Video

625p / 525p / 625i / 525i

EXT-4 / EXT-5
(HDMI Input)

Digital Audio Optical Output --- Digital SPDIF × 1
Headphone 3.5 mm stereo mini jack × 1

Remote Control Unit RM-C1508

Analog VHF: 47MHz - 470MHz

UHF: 470 MHz - 862 MHz
CATV: 116MHz - 172MHz / 220MHz - 469MHz

Digital --- UHF:

VIF 38.9MHz (B/G, I, D/K, L) 38.9MHz (I)

SIF 33.4MHz (5.5MHz :B/G)

32.9MHz (6.0MHz :I)

32.4MHz (6.5MHz :D/K)

PAL 4.43MHz

SECAM 4.40625MHz / 4.25MHz ---

NTSC 3.58MHz / 4.43MHz

TOP
WST(World Standard system)

Digital --- EBU TEXT MHEG 5 UK profile

RCA pin jack × 3

750p / 1125i

Video/Audio HDMI 2-row 19pin connector × 2

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)

(AA/R6 dry cell battery × 2)

LT-32A80SU
LT-32A80ZU

LT-32DA8SU
LT-32DA8ZU

14.3 kg [Included stand]

13.5 kg [TV only]

177.5 MHz - 858 MHz

RM-C1821

(AA/R6 dry cell battery × 2)

PAL
NTSC 3.58/4.43 [EXT only]

UHF: 470 MHz - 862 MHz

UHF:

474 MHz - 850 MHz

32.9MHz (6.0MHz :I)

FLOF (Fastext level 2.5)
WST(World Standard system)

LT-32DA8BJ
LT-32DA8SJ

LT-32DT8ZJ

Design & specifications are subject to change without notice.

(No.YA509)1-3

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)

1-4 (No.YA509)

0.15 F AC-TYPE

GOOD EARTH GROUND

1500 10W

PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T

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.

(No.YA509)1-5

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.

VENTILATION HOLE

*Diagram differs from actual appearance.

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.

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.

1.3.2 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.

150 mm

*Diagram differs from actual appearance.

200 mm

POWER

150 mm

200 mm

50 mm

1-6 (No.YA509)

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.

1.4.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL)

(1) Avoid placing the unit under direct sunlight over a

prolonged period of time. This may cause the optical filter
to deteriorate in quality and COLOUR.

(2) Clean the filter surface by wiping it softly and lightly with a

soft and lightly fuzz cloth (such as outing flannel).

(3) Do not use solvents such as benzene or thinner to wipe the

filter surface. This may cause the filter to deteriorate in
quality or the coating on the surface to come off. When
cleaning the filter, usually use the neutral detergent diluted
with water. When cleaning the dirty filter, use water-diluted
ethanol.

(4) Since the filter surface is fragile, do not scratch or hit it with

hard materials. Be careful enough not to touch the front
surface, especially when taking the unit out of the packing
case or during transportation.

1.4.3 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).

(No.YA509)1-7

SECTION 2

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

*** SHIPPING STRAT ***

SPECIFIC SERVICE INSTRUCTIONS

2.1 SYSTEM SETTEING

Be sure to perform the following operation at the end of the
procedure.

(1) Press the [INFORMATION] key and [MUTING] key

simultaneously, then enter the SERVICE MODE(Fig.2-1).
(2) When the Main Menu is displayed, press [9].
(3) The screen shown in Fig.2-2 is displayed, and the

SYSTEM SETTING starts.

NOTE:

When the SYSTEM SETTING is performed, all settings are
reset to the factory setting. Perform the setting again.

SERVICE MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

Fig. 2-1

Press [9] key

2.2 FEATURES

DIGITAL TUNER [DA8/DT8 series only]

This TV can receive both DVB-T (Digital terrestrial broadcasting)
and Analogue terrestrial broadcasting.

HDMI INPUT

By connecting a HDMI compatible device, high definition
pictures can be displayed on your TV in their digital form.

MOVIE THEATRE

This function displays a cinema film picture more smoothly and
naturally on the screen.

DIGITAL VNR

This function cuts down the amount of noise in the original
picture.

3D Cinema Sound

You can enjoy sounds with a wider ambience.

SHIPPING SCREEN

PR List Empty

*** SHIPPING STRAT ***

Fig. 2-2

2.3 MAIN DIFFERENCE LIST

Item

Paint Color Silver Black Silver Black Silver × Black Silver Black
Digital Tuner NO ← YES ←← ← ←
Teletext (Analog) TOP/FLOF ←←←FLOF ←←
Teletext (Digital) NO ← EBU TEXT ←
Broadcasting System B/G, D/K, I, L ←←← I ←←
RF System PAL/SECAM ←←←PAL ←←
Stereo System A2/NICAM ←←←NICAM ←←

Power cord Plug Type

Indoor ANT Power Supply NO ← YES ←← ← ←
Digital Audio Optical Output NO ← YES ←← ← ←
Remote Control Unit RM-C1508-1C ← RM-C1821-1C ←← ← ←

LT-26A80SU
LT-32A80SU

EU Type (2 Pins)

LT-26A80ZU
LT-32A80ZU

←←←

LT-26DA8SU
LT-32DA8SU

LT-26DA8ZU
LT-32DA8ZU

LT-26DA8BJ
LT-32DA8BJ

MHEG 5 UK profile

UK Type (3 Pins)

LT-26DA8SJ
LT-32DA8SJ

←←

←←

LT-26DT8ZJ
LT-32DT8ZJ

1-8 (No.YA509)

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 (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 Used

(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

(No.YA509)1-9

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

Maximum dimensions ( W × H × D )

26V LCD PANEL UNIT 32V LCD PANEL UNIT

62.6 cm × 37.3 cm × 4.8 cm 76.0 cm × 45.0 cm × 4.5 cm

Specifications

Weight 4.5 kg 6.5 kg

Effective screen size Diagonal: 660 mm (H: 576 mm × V: 324 mm) Diagonal: 800 mm (H: 697 mm × V: 392 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: 0.4215 mm, Vertically: 0.4215 mm Horizontally: 0.51075 mm, Vertically: 0.51075 mm

Displayed colour 16777216 colours 256 colours for R G and B

Brightness 500cd/m

2

Contrast ratio 1200 : 1

Response time (Tr) less than 8 ms

View angle (Horizontally) 176°
View angle (Vertically) 176°

Surface polarizer Anti-Glare type Low reflective coat

Colour filter Vertical stripe

Backlight Cold cathode fluorescent lamp × 6 (U-TYPE) Cold cathode fluorescent lamp × 12

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.

1-10 (No.YA509)

2.5.2 MAIN CPU PIN FUNCTION [IC7001

: MAIN PWB]

Pin Pin name I/O Function

1 T-V LINK_OUT O Data output for T-V LINK
2POWER_G I
3 PROTECTOR I

Not used : Low power voltage detection [NG = H]

Power abnormality detection [Emergent = H]
4 TCLK I Clock for JTAG interface
5 TDO O Data output for JTAG interface
6 TDI I Data input for JTAG interface
7 TMS I Control signal for JTAG interface
8 RESETQ I CPU reset [Reset = L]
9 E3_R I Audio input for EXT-3

10 E3_L I Audio input for EXT-3
11 DIN/D_R I Audio input for digital tuner/HDMI
12 DIN/D_L I Audio input for digital tuner/HDMI
13 E1_R I Audio input for EXT-1
14 E1_L I Audio input for EXT-1
15 E2_R I Audio input for EXT-2
16 E2_L I Audio input for EXT-2
17 VREFAU I Reference voltage setting
18 VSUP8.0AU I 8V power supply
19 GNDA - GND
20 SGND - GND
21 R2_OUT O Audio output for EXT-2
22 L2_OUT O Audio output for EXT-2
23 R_OUT O Audio output for EXT-1
24 L_OUT O Audio output for EXT-1
25 HEADPHONE_R O Audio output for headphone
26 HEADPHONE_L O Audio output for headphone
27 SPEAKER_R O Audio output for speaker
28 SPEAKER_L O Audio output for speaker
29 SUBWOOFER O Not used
30 VREFSIF I Reference voltage setting
31 SIF_IN+ I SIF for VHF/UHF tuner
32 SIF_IN- I SIF for VHF/UHF tuner
33 VSUP5.0 I 5V power supply
34 GNDA - GND
35 GND3.3DIG - GND
36 VSUP3.3DIG I 3.3V power supply
37 SPDIF_OUT O Not used
38 I2S_DA_IN I Not used
39 I2S_CL - Not used
40 I2S_WS - Not used
41 I2S_DEL_OUT O Not used
42 I2S_DEL_IN I Not used
43 I2S_DEL_CL - Not used
44 I2S_DEL_WS - Not used
45 VSUP3.3RAM I 3.3V power supply
46 GND3.3RAM - GND
47 VD_DV1 I V sync for HDMI
48 DE_DV1 I Data enable for HDMI
49 CLK_DV1 I Clock for HDMI
50 DV1_R7 I Pr input for HDMI
51 DV1_R6 I Pr input for HDMI
52 DV1_R5 I Pr input for HDMI
53 DV1_R4 I Pr input for HDMI
54 DV1_R3 I Pr input for HDMI
55 DV1_R2 I Pr input for HDMI
56 DV1_R1 I Pr input for HDMI
57 DV1_R0 I Pr input for HDMI
58 DV1_Y7 I Y input for HDMI
59 DV1_Y6 I Y input for HDMI
60 DV1_Y5 I Y input for HDMI
61 DV1_Y4 I Y input for HDMI
62 DV1_Y3 I Y input for HDMI
63 DV1_Y2 I Y input for HDMI
64 DV1_Y1 I Y input for HDMI
65 DV1_Y0 I Y input for HDMI
66 DV1_B7 I Pb input for HDMI
67 DV1_B6 I Pb input for HDMI
68 DV1_B5 I Pb input for HDMI
69 DV1_B4 I Pb input for HDMI
70 DV1_B3 I Pb input for HDMI
71 DV1_B2 I Pb input for HDMI
72 DV1_B1 I Pb input for HDMI
73 DV1_B0 I Pb input for HDMI
74 GND3.3DRI - GND
75 VSUP3.3DRI I 3.3V power supply
76 GND3.3COM - GND

Pin Pin name I/O Function

77 VSUP3.3COM I 3.3V power supply
78 X'TALIN I 20.25MHz oscillation for CPU system clock
79 X'TALOUT O 20.25MHz oscillation for CPU system clock
80 CLKOUT O Not used
81 VSO O Not used
82 HSO O Not used
83 SCL1 O Clock for I
84 SDA1 I/O Data for I

2

C bus (for HDMI)

2

C bus (for HDMI)
85 GND3.3FL - GND
86 VSUP3.3FL I 3.3V power supply
87 AFC1 I AFT voltage for VHF/UHF tuner
88 DIN_PHOTO I For digital input protection
89 A_MU O
90 PFC_POW O

Speaker/headphone output muting [Muting = H]

Not used : Power on/off control for PFC [ON = L]
91 DIN_INT I Interrupt request for HDMI
92 LCD_POW O Power on/off control for LCD drive [ON = L]
93 OSDV I Not used
94 OSDH I Not used
95 GND3.3IO1 - GND
96 VSUP3.3IO1 I 3.3V power supply
97 OSDCLK I Not used
98 OSDFSW I Not used
99 MAIN_POW O

Power on/off control for main power [ON = L]

100 IDTV_IRQ O Interrupt request for digital tuner
101 RXD I Data communication for digital tuner
102 TXD O Data communication for digital tuner
103 OSDB1 O Not used
104 OSDB0 O Not used
105 LB_POW O

Power on/off control for low bias line [ON = L]

106 REMOCON I Remote control sensor input
107 OSDG1 O Not used
108 OSDG0 O Not used
109 SDA0 I/O Data for I
110 SCL0 O Clock for I

2

C bus (for E2PROM)

2

C bus (for E2PROM)
111 OSDR1 O Not used
112 OSDR0 O Not used
113 GND3.3IO1 - GND
114 VSUP3.3IO1 I 3.3V power supply
115 DIN_HOTP O

Hotplug error detection for HDMI connector-1 [Error = L]
116 DIN_RST O Reset for HDMI [Reset = L]
117 MB_RES O Not used : Reset for MaxxBass [Reset = L]
118 PCS3 O Not used
119 POW_LED O POWER LED(green) lighting [ON = L]
120 DINHOTP2 O

Hotplug error detection for HDMI connector-2 [Error = L]
121 PCLK2 O Not used
122 PCLK1 O Not used
123 GND1.8DIG - GND
124 VSUP1.8DIG I 1.8V power supply
125 DBO1_0 O Not used
126 DBO1_1 O Not used
127 VSUP3.3LVDS I 3.3V power supply
128 LVDS_A3+ O LVDS data output for LCD panel
129 LVDS_A3- O LVDS data output for LCD panel
130 GND3.3LVDS - GND
131 LVDS_ACLK+ O LVDS clock output for LCD panel
132 LVDS_ACLK- O LVDS clock output for LCD panel
133 VSUP3.3LVDS I 3.3V power supply
134 LVDS_A2+ O LVDS data output for LCD panel
135 LVDS_A2- O LVDS data output for LCD panel
136 GND3.3LVDS - GND
137 LVDS_A1+ O LVDS data output for LCD panel
138 LVDS_A1- O LVDS data output for LCD panel
139 VSUP3.3LVDS I 3.3V power supply
140 LVDS_A0+ O LVDS data output for LCD panel
141 LVDS_A0- O LVDS data output for LCD panel
142 VSUP1.8LVDS I 1.8V power supply
143 REXT O Not used
144 GND1.8LVDS - GND
145 DGO1_8 O Not used
146 DGO1_9 O Not used
147 GND3.3LVDS - GND
148 DRO1_1 O Not used
149 LVDS_BCLK- O Not used
150 VSUP3.3LVDS I 3.3V power supply
151 DRO1_2 O Not used
152 DRO1_3 O Not used
153 GND3.3LVDS - GND

(No.YA509)1-11

Pin Pin name I/O Function
154 DRO1_5 O Not used
155 DRO1_6 O Not used
156 VSUP3.3LVDS I 3.3V power supply
157 DRO1_8 O Not used
158 DRO1_9 O Not used
159 AGC I RF AGC voltage for VHF/UHF tuner
160 KEY1 I
161 SLOW1 I EXT-1 SLOW detection
162 SLOW2 I EXT-2 SLOW detection
163 GND3.3DAC - GND
164 VSUP3.3DAC I 3.3V power supply
165 DC_DIM O DC dimming control for back-light inverter
166 PWM_DIM O
167 DTV_SW O
168 SUB_MUTE O Audio output muting [Muting = L]
169 VSUP1.8FE I 1.8V power supply
170 VSUP3.3FE I 3.3V power supply
171 HD_DV1 I H sync for HDMI
172 SC_B1 I B input for EXT-1
173 SC_G1 I G input for EXT-1
174 SC_R1 I R input for EXT-1
175 SC_YS2 I Ys input for EXT-2
176 E3_PB I Pb input for EXT-3
177 E3_Y I Y input for EXT-3
178 E3_PR I Pr input for EXT-3
179 SC_B2 I B input for EXT-2
180 SC_G2 I G input for EXT-2
181 SC_R2/C I R/C input for EXT-2
182 D_BY I Pb input for digital tuner
183 SC_YS1 I Ys input for EXT-1
184 D_Y I Y input for digital tuner
185 VSUP1.8FE I 1.8V power supply
186 GNDA - GND
187 D_RY I Pr input for digital tuner
188 D_CV I Video input for digital tuner
189 E1_CV I Video input for EXT-1
190 E2_CV/Y I Video/Y input for EXT-2
191 TV_CV I Video input for VHF/UHF tuner
192 VSUP3.3VO I 3.3V power supply
193 VOUT3 O Not used
194 VOUT2 O Not used
195 V2_OUT O Video output for EXT-2
196 GND3.3IO3 - GND
197 VSUP3.3IO3 I 3.3V power supply
198 656I0 I Not used
199 656I1 I Not used
200 656I2 I Not used
201 656I3 I Not used
202 656I4 I Not used
203 656I5 I Not used
204 656I6 I Not used
205 656I7 I Not used
206 656CLKI I Not used
207 656CLKO O Not used
208 TV_LINK_IN I Data input from T-V LINK

Key scan for side control (POWER/CH+/CH-/MENU)

PWM dimming control for back-light inverter
Audio output select for EXT-2 [Digital tuner = H]

1-12 (No.YA509)

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

• Be sure to perform the SYSTEM SETTEING, 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 6 screws [A], the 2 screws [B], the 5 screws

[C] and the 5 screws [D].

(2) Remove the REAR COVER.

3.1.2 REMOVING THE STAND ASS’Y (Fig.3-1)

(1) Remove the 4 screws [E].
(2) Remove the STAND ASS’Y in the direction of the arrow.

3.1.3 REMOVING THE POWER PWB (Fig.3-1)

• Remove the REAR COVER.
(1) Remove the 1 screw [F].
(2) Remove the POWER CORD HOLDER.
(3) Remove the POWER CORD.
(4) Remove the 5 screws [G].
(5) Remove the POWER PWB.

3.1.4 REMOVING THE MAIN PWB (Fig.3-1)

• Remove the REAR COVER.
(1) Remove the 1 screw [H] [DA8/DT8 series only].
(2) Remove the DIGITAL BASE [DA8/DT8 series only].
(3) Remove the 2 screws [I] [DA8/DT8 series only].
(4) Remove the 7 screws [J], the 2 screws [K], 1 screw [L] and 1

nut.
(5) Remove the SHIELD COVER.
(6) Remove the 6 screws [M].
(7) Remove the MAIN PWB.

CAUTION :

Make sure to perform the "SYSTEM SETTEING", when MAIN
PWB is replaced.

3.1.5 REMOVING THE DIGITAL TUNER UNIT [DA8/DT8
series only] (Fig.3-1)

• Remove the REAR COVER.

• Remove the DIGITAL BASE.

• Remove the SHIELD COVER.

(1) Remove the 5 screws [N].
(2) Remove the DIGITAL TUNER UNIT.

3.1.6 REMOVING THE SW PWB (Fig.3-1)

• Remove the REAR COVER.

(1) Remove the 2 screws [O].
(2) Remove the SW PWB.
(3) Remove the 2 screws [P].
(4) Remove the CONTROL KNOB.

3.1.7 REMOVING THE LED PWB (Fig.3-1)

• Remove the REAR COVER.

• Remove the STAND ASS’Y.
(1) Remove the 2 screw [Q].
(2) Remove the STAND BASE COVER.
(3) Remove the 1 screw [R] and 2 screws [S].
(4) Remove the STAND BASE.
(5) Remove the 2 screws [T] and 2 hooks [a].
(6) Remove the LED PWB.

3.1.8 REMOVING THE SPEAKER HOLDER AND SPEAKER

(Fig.3-1)

• Remove the REAR COVER.

• Remove the STAND ASS’Y.

• Remove the STAND BASE COVER.

• Remove the STAND BASE.
(1) Remove the 4 screws [U].
(2) Remove the SPEKAER.
(3) Remove the 3 screws [V].
(4) Remove the SPEKAER HOLDER.
(5) Follow the same steps when removing the other hand

SPEAKER HOLDER and SPEAKER.

3.1.9 REMOVING THE LCD PANEL UNIT (Fig.3-1)

• Remove the REAR COVER.

• Remove the STAND ASS’Y.

• Remove the STAND BASE COVER.

• Remove the STAND BASE.

• Remove the POWER CORD HOLDER.

• Remove the SPEKAER HOLDER.
(1) Remove the 6 screws [W].
(2) Remove the 4 screws [X].
(3) Remove the MAIN BASE.
(4) Remove the LCD PANEL UNIT from the FRONT PANEL.

3.1.10 REMOVING THE CONTROL PWB (Fig.3-1)

• Remove the REAR COVER.

• Remove the STAND ASS’Y.

• Remove the STAND BASE COVER.

• Remove the STAND BASE.

• Remove the MIAN BASE.
(1) Remove the 4 screws [Y].
(2) Remove the CONTROL PWB COVER.
(3) Remove the CONTROL PWB.

3.1.11 REMOVING THE INVERTER PWB (Fig.3-1)

• Remove the REAR COVER.
(1) Remove the 6 screws [Z].
(2) Remove the INVERTER PWB COVER.
(3) Remove the INVERTER PWB.

(No.YA509)1-13

B

D

C

D

A

A

Q

DIGITAL
BASE

H

STAND BASE COVER

I

J

REAR COVER

L

SHIELD
COVER

NUT

N

STAND ASS'Y

G

W

MAIN PWB

POWER PWB

X

M

W

K

DIGITAL
TUNER UNIT

X

[DA8/DT8 series]

X

W

MAIN BASE

Z

Y

X

POWER CORD

R

S

F

INVERTER PWB
COVER

INVERTER PWB

O

P

CONTROL KNOB

SW PWB

1-14 (No.YA509)

STAND BASE

CONTROL PWB
COVER

CONTROL
PWB

T

LED PWB

POWER CORD
HOLDER

FRONT PANEL

SPEAKER

U

U

V

V

SPEAKER

U

U

SPACER

V

SPACER

SPEAKER HOLDER

V

a

P

SPACER

SPEAKER HOLDER

SPACER

The illustration is LT-32DA8 series

Fig.3-1

3.2 MEMORY IC REPLACEMENT

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

ADJUST

AUTO

FUL

1.SC ADJ

14

SC DEV:+ 0

- + OK:STORE i=EXIT

• 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

Simbol Number of pins Mounting PWB Main content of data

IC7003

8-pin MAIN PWB Setting value of IC7001(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.3-2). Refer to the SERVICE ADJUSTMENT for
setting.

3.2.3 SERVICE MODE SETTING

SERVICE MODE SCREEN

SERVICE MODE SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

Press [1] key

1. ADJUST

ADJUST

AUTO

1.SC ADJ

- + OK:STORE i=EXIT

FUL

14

SC DEV:+ 0

Fig.3-2

SETTING ITEM

Setting mode Setting items Settings

1.ADJUST 1.SC ADJ. Adjust

2.R DRIVE Adjust

3.G DRIVE Adjust

4.B DRIVE Adjust

5.CUTOFF R Fixed [Do not adjust]

6.CUTOFF G Fixed [Do not adjust]

7.CUTOFF B Fixed [Do not adjust]

8.COLOUR Fixed [Do not adjust]

9.HUE Fixed [Do not adjust]

10.CONTRAST Fixed [Do not adjust]

11.BRIGHT Fixed [Do not adjust]

12.SHARP Fixed [Do not adjust]

13.DC EXTMD Fixed [Do not adjust]

14.PWM EXTMD Fixed [Do not adjust]

(No.YA509)1-15

3.2.4 SETTINGS OF FACTORY SHIPMENT

3.2.4.1 BUTTON OPERATION 3.2.4.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

CHANNEL PR1

VOLUME 10

TV/AV TV

3.2.4.3 REMOTE CONTROL MENU OPERATION

(1) PICTURE

Setting item Setting position

PICTURE MODE BRIGHT

COLOUR TEMP. COOL

FEATURES

DIGITAL VNR ON

Digi Pure ON

MOVIE THEATRE OFF

COLOUR SYSTEM TV Depends on PR/CH

EXT AUTO

4:3 AUTO ASPECT PANORAMIC

(2) SOUND

Setting item Setting position

STEREO / I•II Stereo sound

BASS Centre

TREBLE Centre

BALANCE Centre

HYPER SOUND OFF

3D CINEMA SOUND

SORRUND MID

BASS BOOST MID

(4) FEATURES

Setting item Setting position

SLEEP TIMER OFF

CHILD LOCK ID NO.0000, All CH off

BLUE BACK ON

FAVOURITE SETTING Blank

APPEARANCE TYPE A

(5) SET UP

Setting item Setting position

AUTO PROGRAM TV channel automatically set

EDIT/MANUAL PRESET CH only

LANGUAGE ENGLISH

DECODER (EXT-2) OFF

EXT SETTING EXT-1

ATTENUATOR OFF [DA8/DT8 series only]

HDMI SETTING

HDMI-1 Size AUTO

Audio AUTO

HDMI-2 Size AUTO

CHANNEL PR1

VOLUME 10

ZOOM AUTO

SUB POWER OFF

(6) DTV [DA8/DT8 series only]

[For UK]

Configuration

Audio Language English

Subtitle Language English

Favourite Mode Off

Menu Lock Disable

[For Finland/Germany/Spain/Sweden]

Configuration

Country --- *

Menu Language --- *

Audio Language --- *

Subtitle Language --- *

Teletext Language --- *

EPG Language --- *

Enter PIN Code 0000

Favourite Mode Off

Maturity Rating Off

[For All country]

Setup

Digital Audio Output PCM

Banner Duration 2sec

Receiver Upgrade Auto

Common Interface ---

Antenna Power Off

Setting item Setting position

Setting item Setting position

Setting item Setting position

*It differs according to the language that the user selected.

Setting item Setting position

1-16 (No.YA509)

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.

A

B

C

(4) Then solder leads B and C.

A

B

C

(No.YA509)1-17

SECTION 4

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) This TV is adjusted by using REMOTE CONTROL UNIT.
(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

4.3 MEASURING INSTRUMENT AND FIXTURES

• Signal generator (Pattern generator)[PAL]

• Remote control unit

4.4 ADJUSTMENT ITEMS

 VIDEO CIRCUIT

• COLOUR DECODER adjustment

• WHITE BALANCE (HIGH LIGHT) adjustment

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. (Fig.1)

4.5.3 CHANGE AND MEMORY OF SETTING VALUE

SELECTION OF SETTING ITEM

• [FUNCTION /] key.

For scrolling up / down the setting items.

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 [OK] key.

4.5.4 SERVICE MODE SELECT KEY LOCATION

[A80 series] : RM-C1821

MUTING

INFORMATION

FUNCTION

/

OK

FUNCTION

/

SERVICE MODE SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

Fig.4-1

NOTE:

Before entering the SERVICE MODE, confirm that the setting
of VCR/TV/DVD switch is at the "TV" side. If the switches have
not been properly set, you cannot enter the SERVICE MODE.”

4.5.2 HOW TO EXIT THE SERVICE MODE

Press the [MENU] key to exit the Service mode.

1-18 (No.YA509)

[DA8/DT8 series] : RM-C1508

MUTING

INFORMATION

FUNCTION

/

VCR/TV/DVD
switch

OK

FUNCTION

/

4.5.5 ADJUSTMENT MODE

ADJUST AUTO PAL FUL

1.SC ADJ 14

SC DEV:+ 0

- + OK:STORE i=EXIT

This mode is used to adjust the VIDEO CIRCUIT.

4.5.5.1 HOW TO ENTER THE ADJUSTMENT MODE
When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE (Fig.2).

NOTE:

• 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.

4.5.5.2 DESCRIPTION OF STATUS DISPLAY
(5) SETTING ITEM NAME

SIGNAL SYSTEM

ZOOM MODE

Setting item name are displayed. The setting item numbers to
be displayed are listed below.

ADJUST AUTO PAL FUL

1.SC ADJ 14

Setting mode Setting items Settings

1.ADJUST 1.SC ADJ. Adjust

2.R DRIVE Adjust

3.G DRIVE Adjust

SC DEV:+ 0

- + OK:STORE i=EXIT

4.B DRIVE Adjust

5.CUTOFF R Fixed [Do not adjust]

6.CUTOFF G Fixed [Do not adjust]

SETTING ITEM

(1) SIGNAL SYSTEM

The signal displayed on the screen is displayed.

PAL : PAL50Hz/60Hz (Composite / S-video)

: DVB-T [Only DA8/DT8 series]

: RGB 576i
SECAM : SECAM
NTSC3.58 : NTSC3.58 / RGB 480i
NTSC4.43 : NTSC4.43
480i : 480i (Component) / HDMI 480i
480p : 480p / HDMI 480p
576i : 576i (Component) / HDMI 576i

SETTING VALUE (DATA)

7.CUTOFF B Fixed [Do not adjust]

8.COLOUR Fixed [Do not adjust]

9.HUE Fixed [Do not adjust]

10.CONTRAST Fixed [Do not adjust]

11.BRIGHT Fixed [Do not adjust]

12.SHARP Fixed [Do not adjust]

13.DC EXTMD Fixed [Do not adjust]

14.PWM EXTMD Fixed [Do not adjust]

(7) SETTING VALUE (DATA)

The SETTING VALUE is displayed.
576p : 576p / HDMI 576p
1080i50 : 1080i 50Hz / HDMI 1080i 50Hz
1080i60 : 1080i 60Hz / HDMI 1080i 60Hz
750p50 : HDMI 750p 50Hz
750p60 : HDMI 750p 60Hz

(2) ZOOM MODE

State of the ZOOM MODE is displayed.

FUL : FULL
PAN : PANORAMIC
16Z : 16:9 ZOOM
SUB : 16:9 ZOOM SUBTITLE
14Z : 14:9 ZOOM
REG : REGULAR

(No.YA509)1-19

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.

• Never change the values of the items( ) that are not described in ADJUSTMENT PROCEDURE or in the below table as they
are fixed values.

4.6.1 ADJUSTMENT MODE

Item name Variable range Setting value

1. SC ADJ. 0 - 1023 ---

2. R DRIVE 0 - 1023 920

3. G DRIVE 0 - 1023 920

4. B DRIVE 0 - 1023 920

5. CUTOFF R 0 - 1023 0

6. CUTOFF G 0 - 1023 0

7. CUTOFF B 0 - 1023 0

Item name Input signal Variable range

8. COLOUR Other

SECAM 20 20

NTSC 33 33

480i / 480p(Component/HDMI) 41 41

576i / 576p(Component/HDMI) 40 41

720p / 1080i(Component/HDMI) 38 40

9. HUE Other

SECAM 32 32

NTSC 28 30

480i / 480p(Component/HDMI) 32 28

576i / 576p(Component/HDMI) 31 30

720p / 1080i(Component/HDMI) 32 28

10. CONTRAST Other

NTSC 43 43

Component/HDMI 37 37

11. BRIGHT Other

NTSC 263 263

Component/HDMI 268 272

12. SHARP Other

NTSC 0 0

480i / 480p(Component/HDMI) 0 0

576i / 576p(Component/HDMI) +2 +2

720p / 1080i(Component/HDMI) +3 +3

0 - 63

0 - 63

0 - 63

0 - 511

-3 - +3

Setting value

26 inch models 32 inch models

31 30

30 31

43 43

266 259

0 0

1-20 (No.YA509)

4.7 ADJUSTMENT PROCEDURE

ADJUST AUTO PAL FUL

1.SC ADJ 14

SC DEV:+ 0

- + OK:STORE i=EXIT

4.7.1 VIDEO CIRCUIT

Item

COLOUR
DECODER

Measuring
instrument

Remote
control unit

Signal
generator

Test point Adjustment part Description

ADJUST AUTO PAL FUL

1.SC ADJ 14

[1.ADJUST]

1.SC ADJ

(1) Receive a PAL colour bar signal.
(2) Select "1.ADJUST" from the SERVICE MODE.
(3) Select <1.SC ADJ>.
(4) Adjust the value of <1.SC ADJ> to set the value

of (A) to 0±3.

NOTE:

The value of <1.SC ADJ> should be adjusted
within 7 - 24.

(5) Press the [OK] key to memoirze the set value.

WHITE
BALANCE
(HIGHLIGHT)

SC DEV:+ 0

- + OK:STORE i=EXIT

Remote
control unit

Signal
generator

[1.ADJUST]

2.R DRIVE

3.G DRIVE

4.B DRIVE

(A)

(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) Adjustment is select 1 item from <2.R DRIVE>,

<3.G DRIVE> and <4.B DRIVE> then select item
fix to "920" Other color shold be less than 920.

NOTE:

Finaly minimam more than 1 item (<2.R
DRIVE>, <3.G DRIVE> or <4.B DRIVE>)

should be "920".

(7) Must check white balance adjustment correctry

with low light to high light.

(8) Press the [OK] key to memoirze the set value.

(No.YA509)1-21

SECTION 5

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

SELF CHECK

LOB 0
MEM 0 AIO 0
TUN 0 HDM 0
????

i:EXIT

SELF CHECK

SYN OK CDN 02
ADS 30 AIO 2A

PPL 0425 LPF 01BC
VPS = 0000H (---)
PDC 8/30/1 = 0000H
= 0000H
WSS = 0000H
i:EXIT

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
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.

2

C bus and

SERVICE MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHECK

3.I2C STOP

Press [2] key

SELF CHECK MODE SCREEN (Page 1)

SELF CHECK

Failure history

LOB 0
MEM 0 AIO 0
TUN 0 HDM 0
????

Item

i:EXIT

Press [Red] key

Press [Green] key

SELF CHECK MODE SCREEN (Page 2)

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.

NOTE:

5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK

In addition to circuit failures (abnormal operation), the following
cases may also be iagnosed as "Abnormal" and displayed and
counted as "NG".

Diagnosis may be impeded if a large number of items are
displayed as "NG". As such, start Self check check only after 3
seconds in the case of receivers and 5 seconds in the case of
panels upon turning on the power. If recurrences are expected,
ensure to clear (reset) the failure history and record the new
diagnosis reults.

Only SYNC (with/without sync signals) will be neither counted
nor stored.

FEATURE

(1) Temporary defective transmissions across circuits due to

pulse interruptions
(2) Misalignment in the on/off timing of power for I

when turning on/off the main power.

2

C bus (Vcc)

1-22 (No.YA509)

SELF CHECK

Item

SYN OK CDN 02
ADS 30 AIO 2A

PPL 0425 LPF 01BC
VPS = 0000H (---)
PDC 8/30/1 = 0000H
= 0000H
WSS = 0000H
i:EXIT

Fig.5-1