JVC LT-42S90BB User manual

SERVICE MANUAL
COPYRIGHT © 2008 Victor Company of Japan, Limited No.YA604<Rev.001>
2008/4
WIDE LCD TELEVISION
YA604<Rev.001>20084SERVICE MANUAL
LT-42S90B/B, LT-42S90B/G,
LT-42S90B/L, LT-42S90B/S
COPYRIGHT © 2008 Victor Company of Japan, Limited
<FT4 CHASSIS LINEUP>
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
BASIC CHASSIS
FT4
No.YA597: LT-42DS9 series No.YA598: LT-42S90BU

1-2 (No.YA604<Rev.001>)
SPECIFICATION
Design & specifications are subject to change without notice.
Items Contents
Dimensions ( W ×H ×D ) 98.1 cm ×67.3 cm ×27.5 cm [Included stand]
98.1 cm ×62.7 cm ×7.5 cm [TV only]
Mass 23.3 kg [Included stand]
19.3 kg [TV only]
Power Input AC220V - AC240 V, 50 Hz
Power Consumption 183 W (Standby: 0.5 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)
Receiving Frequency VHF: 47MHz - 470MHz
UHF: 470 MHz - 862 MHz
CATV: 116MHz - 172MHz / 220MHz - 469MHz
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 4.43MHz
SECAM 4.40625MHz / 4.25MHz
NTSC 3.58MHz / 4.43MHz
Teletext System FLOF (Fastext level 2.5)
TOP
WST(World Standard system)
LCD Panel 42V-inch wide aspect (16 : 9)
Screen Size Diagonal : 105 cm (H: 93.0 cm ×V: 52.3 cm)
Display Pixels Horizontal : 1920 dots ×Vertical : 1080 dots (FULL HD)
Audio Power Output 10 W + 10 W
Speaker 4.5 cm ×13.0 cm, oblique type ×2
Aerial Terminal (VHF/UHF) 75 Ωunbalanced, coaxial
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket ) ×2
EXT-3 (Input) Component Video
750p / 1125i / 1125p
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.), 75 Ω
Cb/Cr : 0.7V(p-p), 75 Ω
Video 1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack ×1
Audio 500 mV(rms) (-4dBs), high impedance, RCA pin jack ×2
EXT-4 / EXT-5 /
EXT-6 (HDMI Input)
Video
Audio
HDMI 2-row 19pin connector ×3
(Digital-input terminal is not compatible with picture signals of personal computer)
Supported format: 525i/625i/525p/625p/750p/1125i/1125p(24/50/60)
PCM 2ch
Audio Output 500mV (rms), Low impedance, RCA pin jack ×2
Headphone 3.5 mm stereo mini jack ×1
Remote Control Unit RM-C1932 (AA/R6 dry cell battery ×2)

(No.YA604<Rev.001>)1-3
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(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.YA604<Rev.001>)
1.2 INSTALLATION
1.2.1 ATTACH THE STAND TO THE TV
When installing the unit on the floor, it is required to attach the
supplied stand.
To attach the stand to the TV, follow the procedure below.
To prevent scratches on the panel, lay a piece of soft cloth on an
even platform and place the TV onto it.
1.2.2 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.
1.2.3 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.
1.2.4 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.
1.2.5 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.
*The drawing may differ from the actual appearance.
VENTILATION HOLE
*The drawing may differ from the actual appearance.
200mm
50mm
150mm 150mm
50mm
It fixes in a band.
TV STAND
*The drawing may differ from the actual appearance.

(No.YA604<Rev.001>)1-5
1.3 HANDLING LCD PANEL
1.3.1 PRECAUTIONS FOR TRANSPORTATION
When transporting the unit, pressure exerted on the internal LCD
panel due to improper handling (such as tossing and dropping)
may cause damages even when the unit is carefully packed. To
prevent accidents from occurring during transportation, pay
careful attention before delivery, such as through explaining the
handling instructions to transporters.
Ensure that the following requirements are met during
transportation, as the LCD panel of this unit is made of glass and
therefore fragile:
(1) USE A SPECIAL PACKING CASE FOR THE LCD PANEL
When transporting the LCD panel of the unit, use a special
packing case (packing materials). A special packing case
is used when a LCD panel is supplied as a service spare
part.
(2) ATTACH PROTECTION SHEET TO THE FRONT
Since the front (display part) of the panel is vulnerable,
attach the protection sheet to the front of the LCD panel
before transportation. Protection sheet is used when a LCD
panel is supplied as a service spare part.
(3) AVOID VIBRATIONS AND IMPACTS
The unit may be broken if it is toppled sideways even when
properly packed. Continuous vibration may shift the gap of
the panel, and the unit may not be able to display images
properly. Ensure that the unit is carried by at least 2
persons and pay careful attention not to exert any vibration
or impact on it.
(4) DO NOT PLACE EQUIPMENT HORIZONTALLY
Ensure that it is placed upright and not horizontally during
transportation and storage as the LCD panel is very
vulnerable to lateral impacts and may break. During
transportation, ensure that the unit is loaded along the
traveling direction of the vehicle, and avoid stacking them
on one another. For storage, ensure that they are stacked
in 2 layers or less even when placed upright.
1.3.2 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.
1.3.3 PRECAUTIONS FOR REPLACEMENT OF EXTERIOR
PARTS
Take note of the following when replacing exterior parts (REAR
COVER, FRONT PANEL, etc.):
(1) Do not exert pressure on the front of the LCD panel (filter
surface). It may cause irregular colour.
(2) Pay careful attention not to scratch or stain the front of the
LCD panel (filter surface) with hands.
(3) When replacing exterior parts, the front (LCD panel) should
be placed facing downward. Place a mat, etc. underneath
to avoid causing scratches to the front (filter surface).
1.3.4 HOW TO CHECK THE OPERATING TIME
This model has a function to count and record the LCD panel
operating time. The operating time can be checked in the
following procedure.
• Maximum count time = 131072 hours
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key SELF CHECK MODE.
(3) The operating time of the LCD panel is displayed in 6-digit
decimal number.(Refer to the below figure)
1.3.5 HOW TO RESET THE OPERATING TIME
When the LCD panel unit is replaced, be sure to reset the
operating time in the following method.
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [9] key, then start the SHIPPING setting.
(3) The power of the UNIT is turned off automatically, and the
OPERATING TIME is reset.
Press [2] key
Service Menu
1.Adjust
2.Self Check
3.I2C Stop
*When the power is turned off with the remote control unit or the power
button of the main unit, the count restarts from the turn off time.
*When the power is turned off by disconnecting the power cord from the
AC outlet, the recorded time count less than 2 hours is not counted.
The operating time is displayed.
SERVICE MODE SCREEN
SELF CHECK MODE SCREEN (Page 1)
Self Check
LOB 1
MEM 2 AIO 1
TUN 1 HDM 1
TOS 1
HOUR XXXXXX
Redkey2Page
i:EXIT

1-6 (No.YA604<Rev.001>)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
SUPER SLIM design
The screen surround itself is also very slim, so overall you
have a TV that takes up far less room and is much more like a
picture frame.
FULL HD
Full HD models deliver superbly detailed image reproduction of
more than 2 megapixels (1920 x 1080), which represents double
the resolution offered by WXGA panels.
HDMI INPUT
By connecting a HDMI compatible device, high definition
pictures can be displayed on your TV in their digital form.
DIGITAL VNR
This function cuts down the amount of noise in the original
picture.
MaxxBass
This function emphasizes the bass sound.
3D Cinema Sound
You can enjoy sounds with a wider ambience.
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 MODELS
LT-42S90B/B LT-42S90B/G LT-42S90B/L LT-42S90B/S
POWER CORD Round 2PIN type EU Type (2 Pins) Round 2PIN type UK 3PIN type
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 Not used
8 FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance
Used Used
9 GND (G) Used Used
10 SCL Not used Used (SCL2)
11 G input 700mV(B-W), 75ΩUsed Not 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)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75ΩUsed Not 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]

(No.YA604<Rev.001>)1-7
2.4 TECHNICAL INFORMATION
2.4.1 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.
2.4.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
2.4.1.2 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.
Item Specifications
Maximum dimensions ( W × H × D ) 96.3 cm ×55.6 cm ×2.9 cm
Weight 11.0 kg
Effective screen size Diagonal: 106.7 cm (H: 93.0 cm ×V: 52.3 cm)
Aspect ratio 16 : 9
Drive device / system a-Si-TFT active matrix system
Resolution Horizontally 1920 ×Vertically 1080 ×RGB <FULL HD> 6220800 dots in total
Pixel pitch (pixel size) Horizontally: 0.4845 mm, Vertically: 0.4845 mm
Displayed colour 16777216 colours 256 colours for R G and B
Brightness 500 cd/m2
Contrast ratio 1500 : 1
Response time 6.5 ms
View angle (Horizontally) 178°
View angle (Vertically) 178°
Surface polarizer Anti-Glare type Low reflective coat
Colour filter Vertical stripe
Backlight Cold cathode fluorescent lamp ×22
Power supply voltage in LCD 12 V
Power supply voltage in inverter 24 V
Panel interface system LVDS (Low Voltage Differential Signaling)

1-8 (No.YA604<Rev.001>)
2.4.2 MAIN CPU PIN FUNCTION [IC7001 : MAIN PWB]
Pin Pin name I/O Function
1KEY1 I
Key scan for side control (POWER/VOL/UP/DOWN)
2 ECO SENSER I Eco sensor detection
3 VDD33_GPIO - 3.3V power supply
4 SLOW1 I EXT-1 SLOW detection
5 SLOW2 I EXT-2 SLOW detection
6 AFC1 I AFT voltage for VHF/UHF tuner
7 AGC I RF AGC voltage for VHF/UHF tuner
8 GND - GND
9 VDD33_CADC - 3.3V power supply
10 MONITOR_OUT O Video for EXT-2
11 VDD33_AFE - 3.3V power supply
12 VOUT2 O Not used
13
VDD12_ADC_1234 - 1.25V power supply
14 VOUT3 O Not used
15 GND - GND
16 TV_CV I Video for VHF/UHF tuner
17 GND - GND
18 E1_CV I Video for EXT-1
19
VDD12_ADC_1234 - 1.25V power supply
20 E2_CV/Y I Video/Y for EXT-2
21 GND - GND
22 AGND1234 I LPF setting
23 VDD33_AFE - 3.3V power supply
24 IDTV_CV I Not used
25
VDD12_ADC_1234 - 1.25V power supply
26 IDTV_CR I Cr for digital tuner
27 GND - GND
28 IDTV_Y I Y for digital tuner
29 GND - GND
30 SC_FB1 I Ys for EXT-1
31
VDD12_ADC_1234 - 1.25V power supply
32 IDTV_CB I Not used
33 GND - GND
34 SC_R1 I R for EXT-1
35 VDD33_AREF - 3.3V power supply
36 SC_G1 I G for EXT-1
37
VDD12_ADC_5678 - 1.25V power supply
38 SC_B1 I B for EXT-1
39 GND - GND
40 AGND5678 I LPF setting
41 GND - GND
42 E2_C I C for EXT-2
43
VDD12_ADC_5678 - 1.25V power supply
44 VIN16 I Not used
45 GND - GND
46 VIN17 I Not used
47 VDD33_AREF - 3.3V power supply
48 VIN18 I Not used
49
VDD12_ADC_5678 - 1.25V power supply
50 E3_PR I Pr for EXT-3
51 GND - GND
52 E3_Y I Y for EXT-3
53 GND - GND
54 E3_PB I Pb for EXT-3
55
VDD12_ADC_5678 - 1.25V power supply
56 VIN22 I Not used
57 GND - GND
58 VDD_CORE - 1V power supply
59 GND - GND
60 SIF_INM I SIF for VHF/UHF tuner
61 TU_SIF I SIF for VHF/UHF tuner
62 VDD12_SIFADC - 1.25V power supply
63 LINE_OUT1R O Audio for EXT-1
64 LINE_OUT1L O Audio for EXT-1
65 TU_R O Audio for EXT-2 or Audio
66 TU_L O Audio for EXT-2 or Audio
67 R_AUSW I Audio
68 L_AUSW I Audio
69 VDD33_AAU - 3.3V power supply
70 LINE_IN3R I Not used
71 LINE_IN3L I Not used
72 GND - GND
73 LINE_IN2R I Not used
74 LINE_IN2L I Not used
75 GND - GND
76 LINE_IN1R I Not used
77 LINE_IN1L I Not used
78 VREFAU I Reference voltage setting
79 HP_R O Audio for headphone
80 HP_L O Audio for headphone
81 MAIN_OUT_SUB O Not used
82 M_R O Audio for speaker
83 M_L O Audio for speaker
84 GND - GND
85
VDD10_HDMI1+2 - 1V power supply
86 HMDI1_RXCN I TMDS clock for HDMI
87 HMDI1_RXCP I TMDS clock for HDMI
88 GND - GND
89
VDD33_HDMI1+2 - 3.3V power supply
90 HDMI1_RX0N I TMDS data for HDMI
91 HDMI1_RX0P I TMDS data for HDMI
92 GND - GND
93
VDD10_HDMI1+2 - 1V power supply
94 HDMI1_RX1N I TMDS data for HDMI
95 HDMI1_RX1P I TMDS data for HDMI
96 GND - GND
97
VDD33_HDMI1+2 - 3.3V power supply
98 HDMI1_RX2N I TMDS data for HDMI
99 HDMI1_RX2P I TMDS data for HDMI
100 GND - GND
101
VDD10_HDMI1+2 - 1V power supply
102 VDD_CORE - 1V power supply
103 GND - GND
104
VDD10_HDMI1+2 - 1V power supply
105 HMDI2_RXCN I Not used
106 HMDI2_RXCP I Not used
107 GND - GND
108
VDD33_HDMI1+2 - 3.3V power supply
109 HDMI2_RX0N I Not used
110 HDMI2_RX0P I Not used
111 GND - GND
112
VDD10_HDMI1+2 - 1V power supply
113 HDMI2_RX1N I Not used
114 HDMI2_RX1P I Not used
115 GND - GND
116
VDD33_HDMI1+2 - 3.3V power supply
117 HDMI2_RX2N I Not used
118 HDMI2_RX2P I Not used
119 GND - GND
120
VDD10_HDMI1+2 - 1V power supply
121 VDD25_DRAM - 2.5V power supply
122 DRAM_VREF I Reference voltage setting
123 VDD25_DRAM - 2.5V power supply
124 VDD25_DRAM - 2.5V power supply
125 VDD25_DRAM - 2.5V power supply
126 RX_DTV O Not used
127 DIN_HOTP1 O
Hotplug error detection for HDMI connector-1 [Error = L]
128 AUDIO_MUTE O Speaker/headphone output muting [Muting = H]
129 VDD33_GPIO - 3.3V power supply
130 LB_PRO I
Power abnormality detection [Emergent = H]
131 P3.2 I L fixed
132 HM_SDA I/O Data for I2C bus (for HDMI)
133 HM_SCL O Clock for I2C bus (for HDMI)
134 HM_HPLUG2 O
Hotplug error detection for HDMI connector-2 [Error = L]
135 HM_HPLUG3 O Hotplug error detection for HDMI connector-3 [Error = L]
136 STATUS I Not used
137 ID_RESET O Not used
138 IRQ O Not used
Pin Pin name I/O Function

(No.YA604<Rev.001>)1-9
139 TX_DTV I Not used
140 P4.6 I/O Not used
141 P4.7 I/O Not used
142 BL_ON O
Power on/off control for back-light [ON = L]
143 LCD_POW O Power on/off control for LCD drive [ON = H]
144 VDD33_VIPA - 3.3V power supply
145 TV_LINK_IN I Not used
146 TV LINK_OUT O Not used
147 P2.4 I/O Not used
148 P2.5 I/O Not used
149 P2.6 I/O Not used
150 P2.7 I/O Not used
151 NC I L fixed
152 NC I L fixed
153 NC - GND
154 NC I L fixed
155 P3.0 I L fixed
156 P3.1 I L fixed
157 NC I L fixed
158 VDD33_VIPA - 3.3V power supply
159 NC I L fixed
160 NC I L fixed
161 NC I L fixed
162 VDD33_VIPA - 3.3V power supply
163 NC I L fixed
164 NC I L fixed
165 NC I L fixed
166 SDA0 I/O Data for I2C bus (for E2PROM)
167 SCL0 O Clock for I2C bus (for E2PROM)
168 PFC O Power on/off control for PFC [ON = L]
169 MAIN_POWER O
Power on/off control for main power [ON = L]
170 VDD - 1V power supply
171 TCLK I Clock for JTAG interface
172 TDI I Data for JTAG interface
173 TDO O Data for JTAG interface
174 TMS I Control signal for JTAG interface
175 GND - GND
176 GND - GND
177 GND - GND
178 GND - GND
179 GND - GND
180 GND - GND
181 VDD33_DAU - 3.3V power supply
182 NC - Not used
183 NC I L fixed
184 NC I L fixed
185 NC I L fixed
186 NC - Not used
187 NC - Not used
188 PWM_DIM O
PWM dimming control for back-light inverter
189 VDD25_PIP - 2.5V power supply
190 DC_DIM O
Not used: DC dimming control for back-light inverter
191 PCS6 O Not used
192 PCS5 O Not used
193 VDD25_PIP - 2.5V power supply
194 PCS4 O Not used
195 PCS3 O Not used
196 VDD25_PIP - 2.5V power supply
197 PCS2 O Not used
198 PCS1 O Not used
199 VDD25_DRAM - 2.5V power supply
200 VDD25_DRAM - 2.5V power supply
201 VDD25_DRAM - 2.5V power supply
202 VDD10_DLL - 1V power supply
203 VDD25_DRAM - 2.5V power supply
204 TE2+ O LVDS data for LCD panel
205 TE2- O LVDS data for LCD panel
206 VDD25_VOPA - 2.5V power supply
207 TD2+ O LVDS data for LCD panel
208 TD2- O LVDS data for LCD panel
Pin Pin name I/O Function
209 GND - GND
210 TCLK2+ O LVDS clock for LCD panel
211 TCLK2- O LVDS clock for LCD panel
212 VDD25_VOPA - 2.5V power supply
213 TC2+ O LVDS data for LCD panel
214 TC2- O LVDS data for LCD panel
215 GND - GND
216 TB2+ O LVDS data for LCD panel
217 TB2- O LVDS data for LCD panel
218 VDD25_VOPA - 2.5V power supply
219 TA2+ O LVDS data for LCD panel
220 TA2- O LVDS data for LCD panel
221 GND - GND
222 GND - GND
223 VDD25_PLL - 2.5V power supply
224 VDD33_FLASH - 3.3V power supply
225 VDD10_PLL - 1V power supply
226 TE1+ O LVDS data for LCD panel
227 TE1- O LVDS data for LCD panel
228 VDD25_VOPA - 2.5V power supply
229 TD1+ O LVDS data for LCD panel
230 TD1- O LVDS data for LCD panel
231 GND - GND
232 TCLK1+ O LVDS clock for LCD panel
233 TCLK1- O LVDS clock for LCD panel
234 VDD25_VOPA - 2.5V power supply
235 TC1+ O LVDS data for LCD panel
236 TC1- O LVDS data for LCD panel
237 GND - GND
238 TB1+ O LVDS data for LCD panel
239 TB1- O LVDS data for LCD panel
240 VDD25_VOPA - 2.5V power supply
241 TA1+ O LVDS data for LCD panel
242 TA1- O LVDS data for LCD panel
243 VDD_CORE - 1V power supply
244 VSENSE I Not used
245 VDD10 - 1V power supply
246 GND - GND
247 XTALIN I X'tal oscillation for CPU system clock
248 XTALOUT O X'tal oscillation for CPU system clock
249 VDD33_GPIO - 3.3V power supply
250 RESET I CPU reset [Reset = L]
251 SDA1 I/O Data for I2C bus (for tuner/MaxxBass)
252 SCL1 O
Clock for I2C bus (for tuner/MaxxBass)
253 VDD33_STDB - 3.3V power supply
254 VDD10_STDB - 1V power supply
255 REMOCON I Remote control sensor
256 HM_POWER I Power status detect for HDMI
Pin Pin name I/O Function

1-10 (No.YA604<Rev.001>)
SECTION 3
DISASSEMBLY
3.1 CAUTION AT DISASSEMBLY
• 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.
• Be sure to reattach the wire clamps removed during the procedure to the original positions. (Attaching the wire clamps in wrong
positions may affect the performance.)
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.
3.2 DISASSEMBLY PROCEDURE
3.2.1 REMOVING THE REAR COVER (Fig.3-1)
(1) Remove the 1 screw [A].
(2) Remove the STAND COVER.
(3) Remove the 1 screw [B].
(4) Remove the POWER CORD COVER.
(5) Remove the POWER CORD.
(6) Remove the JACK COVER.
(7) Remove the 2 hooks [a], 10 screws [C], 5 screws [D], 5
screws [E] and 1 screw [F].
(8) Remove the REAR COVER.
3.2.2 REMOVING THE POWER UNIT (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
• Remove the POWER CORD.
(1) Remove the 6 screws [G].
(2) Remove the POWER UNIT.
3.2.3 REMOVING THE MAIN PWB (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the 1 screw [H].
(2) Remove the TERMINAL BASE.
(3) Remove the 7 screws [J].
(4) Remove the MAIN PWB.
3.2.4 REMOVING THE CAPSENS PWB (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the CAPSENS PWB by carefully peeling off the
double faced tape.
3.2.5 REMOVING THE IR PWB (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the 1 screw [M].
(2) Remove the IR PWB.
3.2.6 REMOVING THE HP/USB PWB (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the 1 screw [N].
(2) Remove the HP/USB PWB.
3.2.7 REMOVING THE LED PWB, LED LENS (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the 1 screw [P].
(2) Remove the LED PWB.
(3) Remove the LED LENS.
3.2.8 REMOVING THE SPEAKER (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
(1) Remove the 4 screws [Q].
(2) Remove the SPEAKER HOLDER.
(3) Remove the 4 screws [R].
(4) Remove the SPEAKER.
3.2.9 REMOVING THE STAND ASS’Y (Fig.3-1)
• Remove the STAND COVER.
(1) Remove the 4 screws [S].
(2) Remove the STAND.
3.2.10 REMOVING THE LCD PANEL UNIT (Fig.3-1)
• Remove the STAND COVER.
• Remove the REAR COVER.
• Remove the STAND.
(1) Remove the 3 screws [T] and 2 screws [U].
(2) Remove the STAND SUPPORT.
(3) Remove the 8 screws [V].
(4) Remove the BACK BRACKET.
(5) Remove the 4 screws [W].
(6) Remove the MAIN BASE.
(7) Remove the 6 screws [X].
(8) Slide the SIDE BRACKET in the direction of the arrow to
remove it.
(9) Remove the 4 screws [Y].
(10) Slide the TOP BRACKET in the direction of the arrow to
remove it.
(11) Lift up the LCD PANEL UNIT to remove it.

(No.YA604<Rev.001>)1-11
Fig.3-1
FRONT
STAND COVER
X
Y
Y
X
X
X
RR
M
N
P
T
U
H
S
V
W
V
V
W
GJ
C
D
B
D
C
F
E
STAND
JACK COVER
REAR COVER
POWER CORD POWER CORD COVER
POWER UNIT
MAIN PWB
TERMINAL BASE
MAIN BASE
FRONT PANEL
TOP BRACKET
LED PWB
TOP BRACKET
BACK
BRACKET
BACK
BRACKET
LED LENS
CAPSENS PWB
IR PWB
SIDE BRACKET
<SPEAKER>
SPEAKER
HP/USB PWB
STAND SUPPORT
STAND
SUPPORT
Q
U
Q
T
SIDE BRACKET SPEAKER HOLDER
A
aa
aa

1-12 (No.YA604<Rev.001>)
3.2.11 REMOVING THE LCD CONTROL PWB (Fig.3-2)
• Remove the STAND COVER.
• Remove the REAR COVER.
• Remove the MAIN BASE.
(1) Remove the 4 screws [A].
(2) Remove the LCD CONTROL PWB COVER.
(3) Remove the LCD CONTROL PWB.
3.2.12 REMOVING THE INVERTER PWB (Fig.3-2)
• Remove the STAND COVER.
• Remove the REAR COVER.
• Remove the SIDE BRACKET.
(1) Remove the 6 screws [B].
(2) Remove the INVERTER PWB COVER.
(3) Remove the INVERTER PWB.
(4) Follow the same steps when removing the other
INVERTER PWB.
Fig.3-2
INVERTER PWB COVER
INVERTER PWB COVER
LCD CONTROL PWB COVER
LCD CONTROL PWB
INVERTER PWB (SLAVE)
INVERTER PWB (MASTER) LCD PANEL UNIT
BB
BB
AA

(No.YA604<Rev.001>)1-13
3.3 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.
3.3.1 MEMORY IC TABLE
3.3.2 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting values.
3. Power on
Connect the power plug to the AC outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.
5. User setting
Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.3-3). Refer to the SERVICE ADJUSTMENT for
setting.
3.3.3 SERVICE MODE SETTING
SERVICE MODE SCREEN
Fig.3-3
SETTING ITEM
Symbol Number of pins Mounting PWB Main content of data
IC7003 8-pin MAIN PWB Setting value of IC7001(MAIN CPU) is memorized.
SERVICE MODE SCREEN
ADJUST MODE SCREEN
Service Menu
1.Adjust
2.Self Check
3.I2C Stop
Press [1] key
Adjust PAL BG
1.SC ADJ 15
SC DEV : +00
OK:Store i:Exit
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.CONT. Fixed [Do not adjust]
11.BRIGHT2 Fixed [Do not adjust]
12.SHARP Fixed [Do not adjust]
13.CORING Fixed [Do not adjust]

1-14 (No.YA604<Rev.001>)
3.3.4 SETTINGS OF FACTORY SHIPMENT
3.3.4.1 BUTTON OPERATION 3.3.4.2 REMOTE CONTROL DIRECT OPERATION
3.3.4.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE
(2) SOUND
(3) FEATURES
(4) SET UP
Setting item Setting position
POWER Off
CHANNEL PR1
VOLUME 10
TV/AV TV
Setting item Setting position
CHANNEL PR1
VOLUME 10
ZOOM Auto
SUB POWER Off
VIDEO-3 COMPONENT / COMPOSITE Component
Setting item Setting position
Picture Mode Bright
Colour Temp. Cool
FEATURES
Digital VNR RF Auto
OTHER On
DigiPure On
Movie Theatre Off
Colour Management On
Picture Management On
Smart Picture On
Dynamic Backlight On
MPEG Noise Reduction On
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
Hyper Sound Off
MaxxBass Low
3D CINEMA SOUND
Sorrund Mid
Bass Boost Mid
Auto Volume Control Off
Setting item Setting position
Sleep Timer Off
Child Lock Off (ID:0000)
Blue Back On
Favourite Setting Blank
Power Lamp On
Eco Sensor Off
Setting item Setting position
Auto Program TV Channel Automatically Set
Edit / manual Preset Ch Only
Language English
Ext Setting Ext-1
HDMI-1 Audio Setting Auto

(No.YA604<Rev.001>)1-15
3.4 REPLACEMENT OF CHIP COMPONENT
3.4.1 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.
3.4.2 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.
3.4.3 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

1-16 (No.YA604<Rev.001>)
SECTION 4
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.
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.
NOTE:
Before entering the SERVICE MODE, confirm that the setting
of TV/STB/DVD/AUDIO mode 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 [OK] key.
4.5.4 SERVICE MODE SELECT KEY LOCATION
Setting item Settings position
PICTURE MODE STANDARD
PICTURE adjustments Centre
COLOUR TEMP. NORMAL
Colour Management Off
Picture Management Off
Smart Picture Off
Dynamic Backlight Off
Eco Sensor Off
Service Menu
1.Adjust
2.Self Check
3.I2C Stop
SERVICE MODE SCREEN
NOT USED Refer to SECTION5
INFORMATION
MUTING
OK
FUNCTION
/
FUNCTION
/

(No.YA604<Rev.001>)1-17
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.
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) SETTING ITEM NAME
Setting item name are displayed. The setting item numbers to
be displayed are listed below.
(3) SETTING VALUE (DATA)
The SETTING VALUE is displayed.
Adjust 576 50i
2.R DRIVE XXXX
OK:Store i:Exit
Service Menu
1.Adjust
2.Self Check
3.I2C Stop
Press [1] key
(1) SIGNAL SYSTEM
(3) SETTING VALUE (DATA)(2) SETTING ITEM
SERVICE MODE SCREEN
ADJUST MODE SCREEN
480 60i : 480i (Component) / HDMI 480i
576 50i : 576i (Component) / HDMI 576i
480 60p : 480p (Component) / HDMI 480p
480 60p VGA : HDMI 480p VGA
576 50p : 576p (Component) / HDMI 576p
720 50p : 720p 50Hz (Component) / HDMI 720p 50Hz
720 60p : 720p 60Hz (Component) / HDMI 720p 60Hz
1080 60i : 1080i 60Hz (Component) / HDMI 1080i 60Hz
1080 50i : 1080i 50Hz (Component) / HDMI 1080i 50Hz
1080 60p : 1080p 60Hz (Component) / HDMI 1080p 60Hz
1080 50p : 1080p 50Hz (Component) / HDMI 1080p 50Hz
1080 24p : HDMI 1080p 24Hz
PAL BG : PAL 50Hz(Composite / S-video)
SECAM : SECAM
NTSC3.58 : NTSC3.58
NTSC4.43 : NTSC4.43
PAL 60 : PAL 60Hz(Composite / S-video)
PAL M : PAL M
PAL N : PAL N
RGB 480i : RGB 480i
RGB 576i : RGB 576i
Undefined : Other than those above
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.CONT. Fixed [Do not adjust]
11.BRIGHT2 Fixed [Do not adjust]
12.SHARP Fixed [Do not adjust]
13.CORING Fixed [Do not adjust]

1-18 (No.YA604<Rev.001>)
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.
Item name Variable
range Setting value
1.SC ADJ. 0 - 63 19
2.R DRIVE 0 - 1024 512
3.G DRIVE 0 - 1024 491
4.B DRIVE 0 - 1024 512
5.CUTOFF R -1024 - 1023 0
6.CUTOFF G -1024 - 1023 0
7.CUTOFF B -1024 - 1023 0
Item name Variable
range
Setting value
PAL (EXT) PAL (RF) SECAM (EXT) SECAM (RF)
8.COLOUR 0 - 256 132 145 98 98
9.HUE -64 - 64 -2 -4 -2 -5
10.CONTRAST 0 - 256 140 140 140 140
11.BRIGHT-2 -1024 - 1023 -3 -11 -3 -11
Item name Variable
range
Setting value
NTSC_M /
NTSC4.43 RGB Component /
HDMI
8.COLOUR 0 - 256 127 140 130
9.HUE -64 - 64 -3 -4 -4
10.CONTRAST 0 - 256 135 140 118
11.BRIGHT-2 -1024 - 1023 -15 -3 -23
Item name Variable
range
Setting value
CONPOSITE_50Hz /
S-VIDEO_50Hz
PAL (RF) / SECAM
(RF)
CONPOSITE_60Hz /
S-VIDEO_60Hz NTSC_RF RGB 480i
12.SHARP 0 - 63 32 32 37 32 32
13.CORING 0 - 63 5 5 5 0 2
Item name Variable
range
Setting value
RGB 576i TEXT TWIN
12.SHARP 0 - 63 32 32
13.CORING 0 - 63 2 0
Item name Variable
range
Setting value
Component 480i Component 576i Component 480p Component 576p
Component 720p50 /
Component 1080i50
12.SHARP 0 - 63 35 35 35 35 37
13.CORING 0 - 63 2 2 2 2 2
Item name Variable
range
Setting value
Component 720p60 /
Component 1080i60
Component
1080p50
Component
1080p60
Component 1080i50 /
Component 1080p50
Component 1080i60 /
Component 1080p60
12.SHARP 0 - 63 37 37 37 37 37
13.CORING 0 - 63 2 2 2 2 2

(No.YA604<Rev.001>)1-19
4.7 ADJUSTMENT PROCEDURE
4.7.1 VIDEO CIRCUIT
Item name Variable
range
Setting value
HDMI 480i HDMI 576i HDMI 480p HDMI 576p HDMI 720p50 /
HDMI 1080i50
12.SHARP 0 - 63 35 35 35 35 38
13.CORING 0 - 63 22222
Item name Variable
range
Setting value
HDMI 1080p50 HDMI 1080p60 HDMI 1080i50 /
HDMI 1080p50
HDMI 1080i60 /
HDMI 1080p60 HDMI 1080p24
12.SHARP 0 - 63 38 38 38 38 38
13.CORING 0 - 63 22222
Item Measuring
instrument Test point Adjustment part Description
COLOUR
DECODER
Remote
control unit
Signal
generator
[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 memorize the set value.
WHITE
BALANCE
(HIGHLIGHT)
Remote
control unit
Signal
generator
[1.ADJUST]
2.R DRIVE
3.G DRIVE
4.B 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) Adjustment is select 1 item from <2.R DRIVE>,
<3.G DRIVE> and <4.B DRIVE> then select item
fix to "512" 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 "512".
(7) Must check white balance adjustment correctry
with low light to high light.
(8) Press the [OK] key to memorize the set value.
Adjust PAL BG
1.SC ADJ 15
SC DEV : +00
OK:Store i:Exit
(A)

1-20 (No.YA604<Rev.001>)
SECTION 5
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 I2C bus and
the various control lines connected to the main microcomputer.
5.1.2 HOW TO ENTER THE SELF CHECK MODE
Before enter the SELF CHECK MODE, press the [MODE] key to
confirm that "TV" position is indicated. If it is in a wrong position,
the SELF CHECK MODE operation cannot be performed.
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously, then enter the SERVICE MODE.
(2) Press the [2] key SELF CHECK MODE.
(3) Press the [RED] key to enter Page 2 of the SELF CHECK
MODE.
*Use the [GREEN] key to toggle between Page 1 and Page 2.
NOTE:
When a number key other than the [2] key is pressed in the
SERVICE MODE screen, the other relevant screen may be
displayed.
This is not used in the SELF CHECK MODE. Press the
[MENU] key to return to the MAIN MENU SCREEN.
5.1.3 HOW TO EXIT THE SELF CHECK MODE
To Save Failure History:
Turn off the power by unplugging the AC power cord plug when
in the Self check display mode.
To Clear (Reset) Failure History:
Turn off the power by pressing the [POWER] key on the remote
control unit when in the Self check display mode.
5.1.4 FAILURE HISTORY
Failure history can be counted up to 9 times for each item. When
the number exceeds 9, display will remain as 9. Failure history
will be stored in the memory unless it has been deleted.
NOTE:
Only SYN (with/without sync signals) will be neither counted
nor stored.
5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be diagnosed as "Abnormal" and counted.
(1) Temporary defective transmissions across circuits due to
pulse interruptions.
(2) Misalignment in the on/off timing of power for I2C bus (Vcc)
when turning on/off the main power.
Therefore, turn on the main power, and then wait for about 3
seconds before starting Self check.
If recurrences are expected, ensure to clear (reset) the failure
history and record the new diagnosis results.
Fig.5-1
Press [2] key
Press [Green] key
Press [Red] key
Service Menu
1.Adjust
2.Self Check
3.I2C Stop
SERVICE MODE SCREEN
SELF CHECK MODE SCREEN (Page 1)
SELF CHECK MODE SCREEN (Page 2)
Self Check
LOB 1
MEM 2 AIO 1
TUN 1 HDM 1
TOS 1
HOUR XXXXXX
Redkey2Page
i:EXIT
Self Check
SYN OK CDN 00
ADS 00 ADH 00
PPL 600 LPF 137
INT 0 FMT 00
FMD FF
Greenkey1Page
i:EXIT
Item
Item
Failure history
Failure history
NOT USED
Refer to SECTION1
Diagnosis
OK:Normal
NG:Abnormal