JVC InteriArt LT-26A61SJ User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.YA369
2005/12
WIDE LCD PANEL TELEVISION
YA369200512 LT-26A61BJ, LT-26A61BU, LT-26A61BU/C,
LT-26A61SJ, LT-26A61SU, LT-26A61SU/C,
LT-32A61BJ, LT-32A61BU, LT-32A61BU/C,
LT-32A61SJ, LT-32A61SU, LT-32A61SU/C
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
BASIC CHASSIS
FT

1-2 (No.YA369)
SPECIFICATION
Design & specifications are subject to change without notice.
Items
Contents
LT-26A61BJ
LT-26A61BU
LT-26A61SJ
LT-26A61SU
LT-32A61BJ
LT-32A61BU
LT-32A61SJ
LT-32A61SU
Dimensions ( W ×H ×D ) 68.6 cm ×52.5 cm ×26.9 cm [Included stand]
68.6 cm ×47.4 cm ×12.1 cm [TV only]
82.0 cm ×60.2 cm ×26.9 cm [Included stand]
82.0 cm ×55.1 cm ×12.7 cm [TV only]
Mass 14.9 kg [Included stand]
12.3 kg [TV only]
18.8 kg [Included stand]
15.4 kg [TV only]
Power Input AC110V - AC240 V, 50 Hz / 60 Hz
Power Consumption 158 W (Standby: 2.1 W)
TV RF System CCIR (B/G, I, D/K, L)
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)
Teletext System FLOF (Fastext level 2.5), TOP, WST(World Standard system)
Receiving Frequency VHF: 47MHz - 470MHz
UHF: 470MHz - 862MHz
Intermediate
Frequency
VIF 38.9MHz (B/G, I, D/K, L)
SIF 33.4MHz (5.5MHz :B/G)
32.9MHz (6.0MHz :I)
32.4MHz (6.5MHz :D/K)
Colour Sub
Carrier
Frequency
PAL
SECAM
NTSC
4.43MHz
4.40625MHz / 4.25MHz
3.58MHz / 4.43MHz
LCD panel 26V-inch wide aspect (16 : 9) 32V-inch wide aspect (16 : 9)
Screen Size
Diagonal : 66 cm (H: 57.6 cm × V: 32.4 cm) Diagonal : 80 cm (H: 69.7 cm × V: 39.2 cm)
Display Pixels Horizontal : 1366 dots ×Vertical : 768 dots (W-XGA)
Audio Power Output 5 W + 5 W
Speaker 6.6 cm, round type ×2 (Oblique corn)
Aerial terminal (VHF/UHF) 75 Ωunbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) ×2
EXT-3 (Input) S-Video
Video
Audio
Mini-DIN 4 pin ×1
Y: 1 V (p-p), Positive (Negative sync provided), 75 Ω
C: 0.286 V (p-p) (Burst signal), 75 Ω
1 V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack ×1
500 mV (rms), High impedance, RCA pin jack ×2
EXT-4 (Input) Component Video
1125i/750p
625p / 525p / 625i / 525i
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 provided), 75 Ω
Cb/Cr : 0.7V(p-p), 75 Ω
DIGITAL Input
DVI-D signal link 19pin connector × 1(Digital-input terminal is not compatible with computer signal)
Headphone 3.5 mm stereo mini jack ×1
Remote Control Unit RM-C1816S (AA/R6 dry cell battery ×2)

(No.YA369)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 1000Ωper 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)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500 10W
0.15 F AC-TYPE
GOOD EARTH GROUND

1-4 (No.YA369)
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.YA369)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.
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.
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.
1.3.4 NOTES ON HANDLING
(1) WHEN TAKING UNIT OUT OF A PACKING CASE
When taking the unit out of a packing case, do not grasp
the upper part of the unit. If you take the unit out while
grasping the upper part, the LCD PANEL may be damaged
because of a pressure. Instead of grasping the upper part,
put your hands on the lower backside or sides of the unit.
(2) AS FOR PRESSING OR TOUCHING A SPEAKER
Be careful not to press the opening of the speaker in the
lower part of the unit and around them since the decorative
sheet on the surface of the openings may be deformed.
Ventilation hole
Ventilation hole
*Diagram differs from actual appearance.
*Diagram differs from actual appearance.
200 mm 200 mm
50 mm
150 mm 150 mm
It fixes in a band.
TV Stand
*Diagram differs from actual appearance.

1-6 (No.YA369)
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.YA369)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
T-V LINK
When you have a T-V LINK compatible VCR connected to the
EXT-2 Terminal on the TV,it is easier to set up the VCR and to
view videos.
PICTURE MODE
This function can adjust the picture settings automatically.
ZOOM
This function can change the screen size according to the
picture aspect ratio.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
2.2 MAIN DIFFERENCE LIST
2.3 21-PIN EURO CONNECTOR (SCART) : EXT-1 / EXT-2
(P-P= Peak to Peak, B-W= Blanking to white peak)
Item LT-26A61BJ LT-26A61BU LT-26A61BU/C LT-26A61SJ LT-26A61SU LT-26A61SU/C
PAINT COLOUR BLACK BLACK BLACK SILVER SILVER SILVER
LCD PANLEL UNIT
QLD0408-001-JUK ← QLD0370-002-JUK ←← QLD0408-001-JUK
MAIN PWB QAL0823-001 ←QAL0822-001 ←←QAL0823-001
Item LT-32A61BJ LT-32A61BU LT-32A61BU/C LT-32A61SJ LT-32A61SU LT-32A61SU/C
PAINT COLOUR BLACK BLACK BLACK SILVER SILVER SILVER
LCD PANLEL UNIT
QLD0409-001-JUK ← QLD0371-001-JUK ←← QLD0409-001-JUK
MAIN PWB QAL0825-001 ←QAL0824-001 ←←QAL0825-001
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(B-W), 75ΩUsed Used
8 FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance
Used Used
9 GND (G) Used Used
10 SCL / T-V LINK Not used Used
(SCL2 / TV-LINK)
11 G input 700mV(B-W), 75ΩUsed Used
12 SDA Not used Used (SDA2)
13 GND (R) Used Used
14 GND (YS) Used Not used
15 R / C input R : 700mV(B-W), 75Ω
C : 300mV(P-P), 75ΩUsed (R) Used (C2/R)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75ΩUsed Used
17 GND (VIDEO output) Used Used
18 GND (VIDEO input) Used Used
19 VIDEO output 1V(P-P) (Negative sync), 75ΩUsed (TV OUT) Used (LINE OUT)
20 VIDEO / Y input 1V(P-P) (Negative sync), 75ΩUsed Used
21 COMMON GND Used Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]

1-8 (No.YA369)
2.4 HOW TO IDENTIFY MODELS
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.
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.
BJ, BU, SJ and SU models : "AE" is added to the serial No. after at the Rating label.
BU/C and SU/C models : "CE" is added to the serial No. after at the Rating label.
Item
Specifications
26V-TYPE LCD PANEL UNIT 32V-TYPE LCD PANEL UNIT
QLD0370-002-JUK QLD0408-001-JUK QLD0371-001-JUK QLD0409-001-JUK
Maximum dimensions ( W × H × D ) 626 mm × 373 mm × 52 mm 626 mm × 373 mm × 47.5 mm 760 mm × 450 mm × 50 mm 760 mm × 450 mm × 45 mm
Weight 4.7 kg 4.2 kg 7.0 kg 7.2 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: 0.4215mm Horizontally: 0.51075 mm, Vertically: 0.51075mm
Displayed colour 16777216 colours 256 colours for R G and B
Brightness 500cd/m2
Contrast ratio 1000 : 1 800 : 1 1000 : 1 800 : 1
Response time less than 22 ms less than 35 ms less than 22 ms less than 20 ms
View angle (Horizontally) 178°170°
View angle (Vertically) 178°170°
Surface polarizer Anti-Glare type Low reflective coat
Colour filter Vertical stripe
Backlight U-type Cold cathode fluorescent lamp ×8 Direct-type Cold cathode fluorescent lamp ×16
Power supply voltage in LCD 6.5 V 5 V 6.5 V 5 V
Power supply voltage in inverter 24 V
Panel interface system LVDS (Low Voltage Differential Signaling)
Indicated
MODEL No.
SERIAL NO.
CE
AE
LT-26A60BU
LT-26A60BJ
LT-26A60SU
LT-26A60SJ
LT-32A60BU
LT-32A60BJ
LT-32A60SU
LT-32A60SJ

(No.YA369)1-9
2.5.2 MAIN CPU PIN FUNCTION [U302 : MAIN PWB]
Pin Pin name I/O Function Pin Pin name I/O Function
1 D1 I/O Program ROM data for CPU 51 NC2 - Not used
2 D4 I/O Program ROM data for CPU 52 XTAL2 O 6MHz for system clock
3 D2 I/O Program ROM data for CPU 53 XTAL1 I 6MHz for system clock
4 D3 I/O Program ROM data for CPU 54 NC3 - Not used
5XROM O
This pin must be pulled low to access external ROM. 55 VSSA - GND
6 VDD 2.5 I 2.5V 56 VDDA 2.5 I 2.5V
7 VSS - GND 57 R O R for teletext
8 VDD 3.5 I 3.5V 58 G O G for teletext
9 P0.0 I/O Address/Data for scaler IC 59 B O B for teletext
10 P0.1 I/O Address/Data for scaler IC 60 BLANK/COR O Ys for Teletext
11 P0.2 I/O Address/Data for scaler IC 61 NC4 - Not used
12 P0.3 I/O Address/Data for scaler IC 62 P1.7 O Reset for Scaler IC [H=Reset]
13 P0.4 - Not used 63 NC5 - Not used
14 P0.5 O Address latch Enable 64 WR O Write for memory
15 P0.6 - Not used 65 RD O Read for memory
16 P0.7 - Not used 66 NC6 Not used
17 ENE - Not used 67 A19 O Program ROM address for CPU
18 STOP - Not used 68 A18 O Program ROM address for CPU
19 OCF - Not used 69 A16 O Program ROM address for CPU
20 EXTIF - Not used 70 A17 O Program ROM address for CPU
21 CVBS I Video for teletext 71 A15 O Program ROM address for CPU
22 VDDA 2.5 I 2.5V 72 FL_PGM - Test purpose
23 VSSA - GND 73 VDD 2.5 I 2.5V
24 P2.0 I Scart2 ID [H=Detect] 74 VSS - GND
25 P2.1 I key scan data 1 75 VDD 3.3 I 3.3V
26 P2.2 I key scan data 2 76 A14 O Program ROM address for CPU
27 P2.3 I Scaet1 ID [H=Detect] 77 A12 O Program ROM address for CPU
28 NC1 - Not used 78 A13 O Program ROM address for CPU
29 HS/SSC I Horizontal sync 79 A7 O Program ROM address for CPU
30 VS I Vertical sync 80 FL_RST - Test purpose
31 P3.0 O Data Read for Scaler IC 81 A8 O Program ROM address for CPU
32 P3.1 O Comunication for adjustment [H=TXD] 82 A6 O Program ROM address for CPU
33 P3.2 I TV-Link in 83 A9 O Program ROM address for CPU
34 P3.3 I Remote control 84 A5 O Program ROM address for CPU
35 P3.4 I/O I2C bus Data(for EEPROM) 85 A11 O Program ROM address for CPU
36 P3.5 O I2C bus Clock(for EEPROM) 86 A4 O Program ROM address for CPU
37 P3.6 O Data Write for Scaler IC 87 ALE O Address Latch Enable
38 P3.7 I Comunication for adjustment [H=RXD] 88 PSEN O Program Store Enable
39 VSS - GND 89 A3 O Program ROM address for CPU
40 VDD 3.3 I 3.3V 90 A10 O Program ROM address for CPU
41 P1.0 O RGB Select [L=SCART1, H=SCART2] 91 VSS - GND
42 P1.1 I Headphone Ident [L=Detect] 92 VDD 3.3 I 3.3V
43 P1.2 I/O I2C bus Data(for inter IC) 93 A2 O Program ROM address for CPU
44 P1.3 O I2C bus Clock(for inter IC) 94 A1 O Program ROM address for CPU
45 P1.4 O Reset for inter IC [L=Reset] 95 FL_CE - Test purpose
46 P1.5 I PC Detect [L=Detect] 96 D7 I/O Program ROM data for CPU
47 P1.6 O Memory Pack I2C S/W [L=Detect] 97 A0 O Program ROM address for CPU
48 P4.2 O Main power control [L=ON, H=OFF] 98 D6 I/O Program ROM data for CPU
49 P4.3 O TV-Link out 99 D0 I/O Program ROM data for CPU
50 RST O Reset [L=Reset] 100 D5 I/O Program ROM data for CPU

1-10 (No.YA369)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
CAUTION AT DISASSEMBLY:
• Make sure that the power cord is disconnected from the outlet.
• Pay special attention not to break or damage the parts.
• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers)
makes service procedure manageable.
• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.
3.1.1 REMOVING THE STAND
(1) Remove the JACK COVER.
(2) Remove the STAND COVER by sliding it in the direction of
an arrow.
(3) Remove the 2 screws [A], then remove the STAND
COVER.
(4) Remove the 2 screws [B] and 2 screws [C], then remove
the STAND.
3.1.2 REMOVING THE REAR COVER
• Remove the STAND.
(1) Remove the 8 screws [D], 1 screw [E] and 2 screws [F],
then remove the REAR COVER.
3.1.3 REMOVING THE POWER PWB
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 4 screws [G] and 1 screw [H], then remove the
TERMINAL BASE.
(2) Remove the 8 screws [J], then remove the BACK
BRACKET.
(3) Remove the 6 screws [K], then remove the POWER PWB
SHIELD.
(4) Remove the 5 screws [L], then remove the POWER PWB.
3.1.4 REMOVING THE MAIN PWB
• Remove the STAND.
• Remove the REAR COVER.
• Remove the TERMINAL BASE.
• Remove the BACK BRACKET.
• Remove the POWER PWB SHIELD.
(1) Remove the 7 screws [M] and 2 screws [N], then remove
the MAIN PWB SHIELD.
(2) Remove the 6 screws [P], then remove the MAIN PWB.
3.1.5 REMOVING THE KEY PWB
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [Q], then remove the KEY PWB.
3.1.6 REMOVING THE LED PWB
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 2 screws [R], then remove the LED PWB.
3.1.7 REMOVING THE SPEAKER
• Remove the STAND.
• Remove the REAR COVER.
(1) Remove the 6 screws [S], then remove the SPEAKER (L/
R).
CAUTION:
Please do not disassembly the SPEAKER.
When the speaker is decomposed, the performance cannot be
kept.
3.1.8 REMOVING THE LCD PANEL UNIT
• Remove the STAND.
• Remove the REAR COVER.
• Remove the TERMINAL BASE.
• Remove the BACK BRACKET.
(1) Remove the 6 screws [T], then remove the MAIN BASE.
(2) Remove the 6 screws [U], then remove the FRONT
PANEL.
(3) Remove the 2 screws [V], then remove the TOP FRAME.
(4) Remove the 2 screws [W], then remove the BOTTOM
FRAME.
NOTE:
• Pay special attention not to break or damage on the FRONT
PANEL.
• The LCD PANEL UNIT is fixed to the FRONT PAMEL (at the
back side)by using double-side adhesive tapes. To remove
the LCD PANEL UNIT, remove the adhesive tape on the
FRONT PANEL slowly.

(No.YA369)1-11
Fig.1
BACK BRACKET
MAIN PWB SHIELD
POWER PWB
SHIELD
MAIN BASE
INSULATOR
TOP FRAME
BOTTOM FRAME
JACK COVER
REAR COVER
POWER PWB
POWER CORD
LCD PANEL UNIT
CONTROL PWB
KNOB BASE
LED PWB
FRONT PANEL
TERMINAL BASE
SPEAKER
SPEAKER
MAIN PWB
D
E
J
J
M
PGN
HS
T
S
P
Q
W
U
V
V
U
K
T
J
F
R
This exploded view shows the LT-32A61
series. LT-26A61 series slightly differs from
this exploded view, however it can be
disassembled in the same procedure as LT-
26X506.
B
CA
STAND

1-12 (No.YA369)
3.2 MEMORY IC REPLACEMENT
• 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 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.1). Refer to the SERVICE ADJUSTMENT for setting.
3.2.2 SERVICE MODE SETTING
SERVICE MODE SCREEN
NOTE:
As self check feature is not used in this TV,
“2.SELF_CHECK” cannot be selected (screen display
only).
Fig.1
SETTING ITEM
SERVICE MENU
SERVICE MENU
1.ADJUST
1.ADJUST
2.SELF_CHECK
2.SELF_CHECK
3.I2C STOP
3.I2C STOP
4.OPTION
4.OPTION
SERVICE MODE SCREEN
1. ADJUST
S001 5I R OF 126
S001 5I R OF 126
PAL50 FULL STD H
PAL50 FULL STD H
4. OPTION
0001 GAMMA TABLE 000
0001 GAMMA TABLE 000
Not used
(Display only)
[Do not adjust]
Setting
items Setting items Settings Item No.
1.ADJUST Video system setting -1 Adjust S001 - S043
Video system setting -2 Fixed M001 - M009
Audio System Setting Fixed A001 - A003
Video system setting -3 Fixed D001 - D051
Video system setting -4 Fixed SD01 - SD15
Video system setting -5 Fixed DD07 - DD31
1.OPTION Option Setting Fixed 0001 - 0004

(No.YA369)1-13
3.2.3 SETTINGS OF FACTORY SHIPMENT
3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION
3.2.3.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE
(2) SOUND
(4) FEATURES
(5) SET UP
Setting item Setting position
POWER Off
CHANNEL PR1
VOLUME 10
TV/AV TV
Setting item Setting position
CHANNEL PR1
VOLUME 10
ZOOM PANORAMIC
3D SOUND OFF
Setting item Setting position
PICTURE MODE BRIGHT
COLOUR TEMP. COOL
FEATURES
DIGITAL VNR AUTO (LOW)
COLOUR SYSTEM TV Depends on PR/CH
EXT AUTO
4:3 AUTO ASPECT PANORAMIC
Setting item Setting position
STEREO / I•II Stereo sound
BASS Centre
TREBLE Centre
BALANCE Centre
3D SOUND OFF
Setting item Setting position
SLEEP TIMER OFF
CHILD LOCK ID NO.0000, All CH off
APPEARANCE TYPE D
BLUE BACK ON
FAVOURITE SETTING Reset
Setting item Setting position
AUTO PROGRAM TV channel automatically set
EDIT/MANUAL PRESET CH only
LANGUAGE ENGLISH
DECODER (EXT-2) OFF
EXT SETTING
S-IN BLANK
ID BLANK
DUBBING EXT-1 →EXT-2

1-14 (No.YA369)
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
[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.
(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.
2. How to install Chip parts
[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 Aas indicated in the figure.
(4) Then solder leads Band C.
SOLDER SOLDER
A
B
C
A
B
C

(No.YA369)1-15
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION
(1) 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.
(2) Make sure that connection is correctly made AC to AC
power source.
(3) Turn on the power of the TV and measuring instruments for
warming up for at least 30 minutes before starting
adjustments.
(4) If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
(5) 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.
4.3 MEASURING INSTRUMENT AND FIXTURES
• Signal generator (Pattern generator)[PAL]
• Remote control unit
4.4 ADJUSTMENT ITEMS
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)
Fig.1
NOTE:
• As self check feature is not used in this TV,
“2.SELF_CHECK” cannot be selected (screen display
only).
• 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.
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 [MUTING]
key.
4.5.4 SERVICE MODE SELECT KEY LOCATION
Setting item Settings position
PICTURE MODE STANDARD
PICTURE adjustments Centre
COLOUR TEMP. NORMAL
SERVICE MENU
SERVICE MENU
1.ADJUST
1.ADJUST
2.SELF_CHECK
2.SELF_CHECK
3.I2C STOP
3.I2C STOP
4.OPTION
4.OPTION
SERVICE MODE SCREEN
Not used
(Display only)
FUNCTION /
NUMBER
MUTING
INFORMATION
FUNCTION /
MENU
VCR/TV/DVD
switch

1-16 (No.YA369)
4.5.5 ADJUSTMENT MODE
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
(1) SIGNAL SYSTEM
The signal displayed on the screen is displayed.
(2) ZOOM MODE
State of the screen mode is displayed.
NOTE:
In ADJUSTMENT MODE, the screen mode can be set only
to "FULL". When it is entered to ADJUSTMENT MODE, it is
automatically changed to "FULL", even if the setting is in
other screen mode.
(3) PICTURE MODE
State of the picture mode is displayed.
NOTE:
In ADJUSTMENT MODE, the picture mode can be set only
to "STANDARD". When it is entered to ADJUSTMENT
MODE, it is automatically changed to "STANDARD", even
if the setting is in other picture mode.
(4) WHITE BALANCE
State of the colour temperature is displayed.
NOTE:
In ADJUSTMENT MODE, the colour temperature can be set
only to "NORMAL". When it is entered to ADJUSTMENT
MODE, it is automatically changed to "NORMAL", even if
the setting is in other colour temperature.
(5) SETTING ITEM NAME
Setting item name are displayed. The setting item numbers to
be displayed are listed below.
(6) SETTING ITEM NO.
Setting item numbers are displayed. For the setting item
names to be displayed, refer to "INITIAL SETTING VALUES
IN THE SERVICE MODE".
(7) SETTING VALUE (DATA)
The SETTING VALUE is displayed.
4.5.6 OPTION MODE [Do not adjust]
Display of optin data setting.
4.5.6.1 DESCRIPTION OF STATUS DISPLAY
(1) SETTING ITEM NAME
Setting item name are displayed. The setting item numbers to
be displayed are listed below.
(2) SETTING ITEM NO.
Setting item numbers are displayed. For the setting item
names to be displayed, refer to "INITIAL SETTING VALUES
IN THE SERVICE MODE".
(3) SETTING VALUE (DATA)
The SETTING VALUE 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
750P6 : 750p 60Hz
PCVGA : PC (VGA)
PCXGA : PC (XGA)
SIGNAL SYSTEM ZOOM MODE PICTURE MODE
SETTING VALUE (DATA)SETTINGITEM No. SETTING ITEM
COLOUR TEMP.
S001 5I R OF 126
S001 5I R OF 126
PAL50 FULL STD H
PAL50 FULL STD H
Item No. Setting item
S001 - S043 Video system setting -1
M001 - M009 Video system setting -2
A001 - A003 Audio System Setting
D001 - D051 Video system setting -3
SD01 - SD15 Video system setting -4
DD07 - DD31 Video system setting -5
Item No. Setting item
0001 - 0004 optin data setting [Do not adjust]
0001 GAMMA TABLE 000
0001 GAMMA TABLE 000
OPTION MODE SCREEN
SETTING VALUE (DATA)SETTINGITEM No. SETTING ITEM

(No.YA369)1-17
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 ADJUSTMENT MODE
4.6.1.1 VIDEO SYSTEM SETTING -1 4.6.1.2 VIDEO SYSTEM SETTING -2 (Fixed values)
4.6.1.3 AUDIO SYSTEM SETTING (Fixed values)
4.6.1.4 VIDEO SYSTEM SETTING -3 (Fixed values)
Item No. Item name Variable range Setting value
S001 5I R OF 000 - 255 127
S002 5I G OF 000 - 255 127
S003 5I B OF 000 - 255 126
S004 5P R OF 000 - 255 127
S005 5P G OF 000 - 255 127
S006 5P B OF 000 - 255 126
S007 HD75 R OF 000 - 255 127
S008 HD75 G OF 000 - 255 127
S009 HD75 B OF 000 - 255 126
S010 HD25 R OF 000 - 255 127
S011 HD25 G OF 000 - 255 127
S012 HD25 B OF 000 - 255 126
S013 R DRIVE 000 - 255 150
S014 G DRIVE 000 - 255 126
S015 B DRIVE 000 - 255 117
S016 HD R DR -32 - 31 00
S017 HD G DR -32 - 31 00
S018 HD B DR -32 - 31 00
S019 CL R DR -32 - 31 01
S020 CL G DR -32 - 31 01
S021 CL B DR -32 - 31 08
S022 WM R DR -32 - 31 00
S023 WM G DR -32 - 31 -7
S024 WM B DR -32 - 31 -16
S025 HD CL R DR -32 - 31 01
S026 HD CL G DR -32 - 31 00
S027 HD CL B DR -32 - 31 00
S028 HD WM R DR -32 - 31 00
S029 HD WM G DR -32 - 31 -2
S030 HD WM B DR -32 - 31 -1
S031 PC R OF 000 - 255 115
S032 PC G OF 000 - 255 127
S033 PC B OF 000 - 255 127
S034 PC R DR -32 - 31 -23
S035 PC G DR -32 - 31 00
S036 PC B DR -32 - 31 00
S037 PC CL R DR -32 - 31 00
S038 PC CL G DR -32 - 31 03
S039 PC CL B DR -32 - 31 09
S040 PC WM R DR -32 - 31 00
S041 PC WM G DR -32 - 31 -6
S042 PC WM B DR -32 - 31 -15
S043 PC AUTO WB 0 - 1 0
Item No. Item name Variable range Setting value
M001 MV CON 000 - 255 105
M002 MV SHA 00 - 63 09
M003 MV COL 000 - 255 147
M004 MV TIN 000 - 255 051
M005 AGC GAIN 000 - 255 120
M006 ERR Limit 000 - 127 022
M007 PC R GAIN 000 - 255 099
M008 PC G GAIN 000 - 255 099
M009 PC B GAIN 000 - 255 101
Item No. Item name Variable range Setting value
A001 S BASS 00 - 16 8
A002 S TRE 00 - 16 8
A003 3D LEVEL 00 - 63 31
Item No. Item name Variable range Setting value
D001 S CON 00 - 63 20
D002 S BRI 00 - 63 47
D003 S SHA 00 - 15 0
D004 S COL 00 - 63 35
D005 S TIN 00 - 63 32
D006 RGB S COL 000 - 127 085
D007 5I S CON 00 - 63 25
D008 5I S BRI 00 - 63 35
D009 5I S SHA 00 - 63 46
D010 5I S COL 00 - 63 53
D011 5I S TIN 00 - 63 35
D012 5P S CON 00 - 63 24
D013 5P S BRI 00 - 63 35
D014 5P S SHA 00 - 63 18
D015 5P S COL 00 - 63 51
D016 5P S TIN 00 - 63 35
D017 HD75 S CON 00 - 63 29
D018 HD75 S BRI 00 - 63 32
D019 HD75 S SHA 00 - 63 30
D020 HD75 S COL 00 - 63 52
D021 HD75 S TIN 00 - 63 34
D022 HD25 S CON 00 - 63 29
D023 HD25 S BRI 00 - 63 32
D024 HD25 S SHA 00 - 63 30
D025 HD25 S COL 00 - 63 52
D026 HD25 S TIN 00 - 63 34

1-18 (No.YA369)
4.6.1.5 VIDEO SYSTEM SETTING -4 (Fixed values)
4.6.1.6 VIDEO SYSTEM SETTING -5 (Fixed values)
4.6.2 OPTION MODE
4.6.3 OPTION SETTING (Fixed values)
D027 PC S CON 00 - 63 25
D028 PC S BRI 00 - 63 35
D029 TXT S CON 000 - 127 024
D030 TXT S BRI 000 - 127 016
D031 RGB S CON 000 - 127 040
D032 RGB S BRI 000 - 127 062
D033 STD BRI1 00 - 31 025
D034 STD CON 00 - 31 016
D035 STD BRI2 00 - 31 16
D036 STD SHA 00 - 31 16
D037 STD COL 00 - 31 16
D038 STD TIN 00 - 31 16
D039 SFT BRI1 00 - 31 16
D040 SFT CON 00 - 31 16
D041 SFT BRI2 00 - 31 16
D042 SFT SHA 00 - 31 16
D043 SFT COL 00 - 31 16
D044 SFT TIN 00 - 31 16
D045 BRI BRI1 00 - 31 31
D046 BRI CON 00 - 31 21
D047 BRI BRI2 00 - 31 14
D048 BRI SHA 00 - 31 21
D049 BRI COL 00 - 31 16
D050 BRI TIN 00 - 31 16
D051 PWM 00 - 31 5
Item No. Item name Variable range Setting value
SD01 5I R DR 00 - 63 30
SD02 5I G DR 00 - 63 26
SD03 5I B DR 00 - 63 30
SD04 5P R DR 00 - 63 30
SD05 5P G DR 00 - 63 26
SD06 5P B DR 00 - 63 30
SD07 HD75 R DR 00 - 63 30
SD08 HD75 G DR 00 - 63 26
SD09 HD75 B DR 00 - 63 30
SD10 HD25 R DR 00 - 63 30
SD11 HD25 G DR 00 - 63 26
SD12 HD25 B DR 00 - 63 30
SD13 PC R DR 00 - 63 5
SD14 PC G DR 00 - 63 5
SD15 PC B DR 00 - 63 5
Item No. Item name Variable range Setting value
Item No. Item name Variable range Setting value
DD07 5I S CON 00 - 63 31
DD08 5I S BRI 00 - 63 10
DD09 5I S SHA 00 - 63 35
DD10 5I S COL 00 - 63 52
DD11 5I S TIN 00 - 63 32
DD12 5P S CON 00 - 63 31
DD13 5P S BRI 00 - 63 10
DD14 5P S SHA 00 - 63 30
DD15 5P S COL 00 - 63 52
DD16 5P S TIN 00 - 63 32
DD17 HD75 S CON 00 - 63 31
DD18 HD75 S BRI 00 - 63 10
DD19 HD75 S SHA 00 - 63 45
DD20 HD75 S COL 00 - 63 52
DD21 HD75 S TIN 00 - 63 32
DD22 HD25 S CON 00 - 63 31
DD23 HD25 S BRI 00 - 63 10
DD24 HD25 S SHA 00 - 63 45
DD25 HD25 S COL 00 - 63 52
DD26 HD25 S TIN 00 - 63 32
DD27 PC S CON 00 - 63 35
DD28 PC S BRI 00 - 63 0
DD29 PC S SHA 00 - 63 40
DD30 PC S COL 00 - 63 52
DD31 PC S TIN 00 - 63 32
Item No. Item name Variable range Setting value
0001 GAMMA TABLE 000 - 005 001
0002 DIMMING 000 -002 000
0003 HPD SW 000 - 001 000
0004 HPD DELAY 000 - 255 010
0005 DVI MCLK 000 - 255 090

(No.YA369)1-19
4.7 ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
Item Measuring
instrument Test point Adjustment part Description
WHITE
BALANCE
(HIGHLIGHT)
Remote
control unit
Signal
generator
[1.ADJUST]
S013: R DRIVE (Red drive)
S015: G DRIVE (Green drive)
S017: 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) Set < S013 > (R DRIVE), < S015 > (G DRIVE)
and < S017 > (B DRIVE) to setting values of left
table.
(7) Adjust to Keep one of < S030 > (Red drive),
< S031 > (Green drive) or < S032 > (Blue
drive) unchanged, then lower the other two
so that the all-white screen is equally white
throughout.
NOTE:
Set one or more of < S013 >, < S015 >, and
< S017 > to setting values of left table.
(8) Check that white balance is properly tracked
from low light to high light. If the white balance
tracking is deviated, adjust to correct it.
(9) Press the [MUTING] key to memoirze the set
value.
Setting ValueModels
LT-26A61BJ
LT-26A61BU
LT-26A61BU/C
LT-26A61SJ
LT-26A61SU
LT-26A61SU/C
146
146
140
140
140
146
26V-inch
Setting ValueModels
LT-32A61BJ
LT-32A61BU
LT-32A61BU/C
LT-32A61SJ
LT-32A61SU
LT-32A61SU/C
146
146
140
150
150
146
32V-inch

(No.YA369)
Flat Panel Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
Victor Company of Japan, Limited
VPT
Printed in Japan