LT-52X579_KA Ch.FN3 (sm-YA654_Rev.001)

7/29/2019 LT-52X579_KA Ch.FN3 (sm-YA654_Rev.001)

1/16

SERVICE MANUAL

COPYRIGHT 2008 Victor Company of Japan, Limited No.YA654


2/161-2 (No.YA654)

SPECIFICATION

Design & specifications are subject to change without notice.

Items Contents

Dimensions ( W H D ) 125.8 cm 87.57 cm 34.57 cm (49-1/2" 34-1/2" 13-5/8") [with stand]

125.8 cm 82.5 cm 12.29 cm (49-1/2" 32-1/2" 4-13/16") [without stand]

Mass 34.0 kg (74.8 lbs) [with stand]

29.7 kg (65.3 lbs) [without stand]

Power Input AC120 V , 60 Hz

Power Consumption 276W (Max)

TV RF System(Analog / Digital)

AnalogDigital

CCIR (M)ATSC terrestrial / Digi tal cable

Color System (Analog) NTSC

Stereo System (Analog) BTSC (Multi Channel Sound)

Teletext System (Analog) Closed caption (T1-T4 / CC1-CC4)

TV Receiving Channels

and Frequency (Analog)

VHF Low

VHF High

UHF

CATV

02 ch - 06 ch : 54 MHz - 88 MHz

07 ch - 13 ch : 174 MHz - 216 MHz

14 ch - 69 ch : 470 MHz - 806 MHz

54 MHz - 804 MHz

Low Band : 02 - 06

High Band : 07 - 13

Mid Band : 14 - 22

Super Band : 23 - 36

Hyper Band : 37 - 64

Ultra Band : 65 - 94, 100 - 135Sub Mid Band : 01, 96 - 99

TV / CATV Total Channel 191 Channels

Intermediate Frequency

(Analog)

Video IF

Sound IF

45.75 MHz

41.25 MHz (4.5 MHz)

Color Sub Carrier Frequency (Analog) 3.58 MHz

LCD Panel 52V-inch wide aspect (16:9)

Screen Size Diagonal: 132.17 cm (H: 115.2 cm V: 64.8 cm)

Display Pixels Horizontal : 1920 dots Vertical : 1080 dots

Audio Power Output 10 W + 10 W

Speaker 4.0 cm 16.0 cm, oval type(Oblique corn) 2

Antenna Terminal

(VHF/UHF, ATSC / DIGITAL CABLE IN)

F-type connector, 75 unbalanced, coaxial 1

Digital Input

[INPUT-1/2/3]

Digital(Video/Audio) HDMI 2-row 19pin connector 3

(Digital-input terminal is not compatible with picture signals of personal computer)

Video: Supported format: 1080p / 1080i / 720p / 480p / 480i

Audio: 2ch L-PCM, 32 / 44.1 / 48 KHz, 16 / 20 / 24 bit

Analog (Audio) 500mV(rms) (-4dBs), high impedance, RCA pin jack 2

Video / Audio Input

[INPUT-4]

Component Video

1080i / 720p

480p / 480i

RCA pin jack 3

Y : 1 V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75

Pb/Pr : 0.35V(p-p), 75

Y : 1 V (p-p), Positive (Negative sync.), 75

Cb/Cr : 0.7V(p-p), 75

S-Video Mini-DIN 4 pin 1

Y: 1 V (p-p), Positive (Negative sync.), 75

C: 0.286V (p-p) (Burst signal), 75

Video 1 V (p-p), Positive (Negative sync.), 75 , RCA pin jack 1

Audio 500 mV (rms), High impedance, RCA pin jack 2

Video / Audio Input

[INPUT-5]

Component Video

1080i / 720p

480p / 480i

RCA pin jack 3

Y : 1 V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75

Pb/Pr : 0.35V(p-p), 75

Y : 1 V (p-p), Positive (Negative sync.), 75

Cb/Cr : 0.7V(p-p), 75

Video 1 V (p-p), Positive (Negative sync.), 75 , RCA pin jack 1

Audio 500 mV (rms), High impedance, RCA pin jack 2

Audio output (Fix) 500 mV (rms), Low impedance, RCA pin jack 2

Digital Audio Optical Output Digital SPDIF 1

Photo Viewer / Service USB connector 1

Remote Control Unit RM-C2050 (AA/R6 battery 2)


3/16(No.YA654)1

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(1) The design of this product contains special hardware,many circuits and components specially for safetypurposes. For continued protection, no changes should bemade to the original design unless authorized in writing by

the manufacturer. Replacement parts must be identical tothose used in the original circuits. Service should beperformed by qualified personnel only.

(2) Alterations of the design or circuitry of the products shouldnot be made. Any design alterations or additions will voidthe manufacturer's warranty and will further relieve themanufacturer of responsibility for personal injury orproperty damage resulting therefrom.

(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. Thesecharacteristics are often not evident from visual inspectionnor can the protection afforded by them necessarily beobtained by using replacement components rated forhigher voltage, wattage, etc. Replacement parts whichhave these special safety characteristics are identified in

the parts list of Service manual. Electrical componentshaving such features are identified by shading on theschematics and by ( ) on the parts list in Servicemanual. The use of a substitute replacement which doesnot have the same safety characteristics as therecommended replacement part shown in the parts list ofService manual may cause shock, fire, or other hazards.

(4) Don't short between the LIVE side ground andISOLATED (NEUTRAL) side ground or EARTH sideground when repairing.Some model's power circuit is partly different in the GND.The difference of the GND is shown by the LIVE : ( ) sideGND, the ISOLATED (NEUTRAL) : ( ) side GND andEARTH : ( ) side GND.

Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and nevermeasure the LIVE side GND and ISOLATED (NEUTRAL)side GND or EARTH side GND at the same time with ameasuring apparatus (oscilloscope etc.). If above note willnot 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 leaddress in the high voltage circuit area. Where a short circuithas occurred, those components that indicate evidence ofoverheating should be replaced. Always use themanufacturer's replacement components.

(6) Isolation Check (Safety for Electrical Shock Hazard)After re-assembling the product, always perform aisolation check on the exposed metal parts of the cabin(antenna terminals, video/audio input and output termina

Control knobs, metal cabinet, screw heads, earphone jaccontrol shafts, etc.) to be sure the product is safe to operawithout danger of electrical shock.

a) Dielectric Strength TestThe isolation between the AC primary circuit and all metparts exposed to the user, particularly any exposed metpart having a return path to the chassis should withstandvoltage of 3000V AC (r.m.s.) for a period of one second.. . . Withstand a voltage of 1100V AC (r.m.s.) to aappliance rated up to 120V, and 3000V AC (r.m.s.) to aappliance rated 200V or more, for a period of one secondThis method of test requires a test equipment not generafound in the service trade.

b) Leakage Current CheckPlug the AC line cord directly into the AC outlet (do not us

a line isolation transformer during this check.). Using "Leakage Current Tester", measure the leakage currefrom each exposed metal part of the cabinet, particularany exposed metal part having a return path to the chassto a known good earth ground (water pipe, etc.). Anleakage current must not exceed 0.5mA AC (r.m.s.).However, in tropical area, this must not exceed 0.2mA A(r.m.s.).

Alternate Check MethodPlug the AC line cord directly into the AC outlet (do nuse a line isolation transformer during this check.). Usan AC voltmeter having 1000 per volt or mosensitivity in the following manner. Connect a 150010W resistor paralleled by a 0.15F AC-type capacit

between an exposed metal part and a known good earground (water pipe, etc.). Measure the AC voltagacross the resistor with the AC voltmeter. Move thresistor connection to each exposed metal paparticularly any exposed metal part having a return pato the chassis, and measure the AC voltage across thresistor. Now, reverse the plug in the AC outlet anrepeat each measurement. Any voltage measured munot exceed 0.75V AC (r.m.s.). This corresponds 0.5mA AC (r.m.s.).However, in tropical area, this must not exceed 0.35

AC (r.m.s.). This corresponds to 0.3mA AC (r.m.s.).

AC VOLTMETER

(HAVING 1000 /V,OR MORE SENSITIVITY)

PLACE THIS PROBE

ON EACH EXPOSED

METAL PART1500 10W

0.15 F AC-TYPE

GOOD EARTH GROUND


4/161 - 4 ( N o . Y A 6 5 4 < R e v . 0 0 1 > )

1.2 INSTALLATION

1.2.1 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.

1.2.2 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.

1.2.3 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.

1.2.4 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 theupper 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 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 andtherefore 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.

*The drawing may differ from the actual appearance.

Ventilation hole


150 mm5 7/8 inch

200 mm

7 7/8 inch

50 mm2 inch

150 mm5 7/8 inch

200 mm

7 7/8 inch

It fixes in a band.

TV STAND



5/16(No.YA654)1

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 color.

(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 EXTERIO

PARTS

Take note of the following when replacing exterior parts (REA

COVER, FRONT PANEL, etc.):

(1) Do not exert pressure on the front of the LCD panel (filt

surface). It may cause irregular color.

(2) Pay careful attention not to scratch or stain the front of th

LCD panel (filter surface) with hands.

(3) When replacing exterior parts, the front (LCD panel) shou

be placed facing downward. Place a mat, etc. undernea

to avoid causing scratches to the front (filter surface).

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURESBuilt in ATSC (Advanced Television Systems Committee)

TUNER

This TV can receive both Digital broadcasting (ATSC) and

Analog broadcasting.

Color Management

This function ensures dull colors are compensated to produce

natural hues.

Smart Picture

This function detects the APL (Average Picture Level) an

adjusts the contrast suitable for what you are watching.

DIGITAL VNR

This function cuts down the amount of noise in the origin

picture.

MPEG Noise Reduction

This function effects the block noise removal and mosquito N

simultaneously.


6/161-6 (No.YA654)

2.2 TECHNICAL INFORMATION

2.2.1 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.

2.2.1.1 SPECIFICATIONS

The following table shows the specifications of this unit.

2.2.1.2 PIXEL FAULT

There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows. BRIGHT FAULTIn 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 FAULTIn 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 color and find out the cell that is not lighting.

FLICKER FAULTIn 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 color and find out the cell that is flashing on

and off.

Item SpecificationsMaximum dimensions ( W H D ) 121.9 cm 70.67 cm 6.46 cm

Weight 15.5 kg

Effective screen size Diagonal: 132.17 cm (H: 115.2 cm V: 64.8 cm)

Aspect ratio 16 : 9

Drive device / system a-Si-TFT active matrix system

Resolution Horizontally 1920 Vertically 1080 RGB 6220800 dots in total

Pixel pitch (pixel size) Horizontally: 0.600 mm, Vertically: 0.600 mm

Displayed colour 16777216 colours 256 colours for R G and B

Brightness 450 cd/m2

Contrast ratio 2000 : 1

Response time 6 ms

View angle Horizontally: 176, Vertically: 176

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)


7/16(No.YA654)1

2.2.2 SUB MICRO COMPUTER (CPU) FUNCTION [SIGNAL PWB: IC2501]

PinNo.

Pin name I/O Function

1 P9_4 - Not used

2 P9_3 - Not used

3 P9_2 - Not used

4 P9_1 - Not used

5 P9_0 - Not used

6 BYTE I Data bus width select [L fixed]7 CNVSS I CPU mode select [Normal = L]

8 P8_7 - Not used

9 XRES I Not used

10 RESET I CPU reset [Reset = L]

11 XOUT O Oscillation for system clock

12 VSS - GND

13 XIN I Oscillation for system clock

14 VCC1 - +3.3V power supply

15 NMI I Non-maskable interrupt [H fixed]

16 MCU_RESET2 I Interrupt detection for 24V power supply [Error = L]

17 POWER_KEY I Interrupt detection for mecanical POWER SW [On = L]

18 IR_33 I Remote control

19 P8_1 - Not used

20 P8_0 - Not used

21 LED_DIMMING O Brightness control for POWER LED [Bright = H]

22 LED_ON O Lighting for POWER LED [On = H]

23 AC_IN I Not used

24 ILLUMI_ON O Not used

25 VGA_DET I Not used

26 ILL_DIMMING O Not used

27 RX_NF I Not used

28 TX_NF O Not used

29 TXD1 O Data transmission (serial) for external programming

30 RXD1 I Data receive (serial) for external programming

31 CLK1 I/O Clock for external programming

32 RTS1 O Busy for external programming

33 MCU_TXD O Serial data transmission for main CPU

34 MCU_RXD I Serial data receive for main CPU

35 P6_1 - Not used

36 P6_0 - Not used

37 P5_7 - Not used

38 P5_6 - Not used

39 HOLD I CPU mode select [L fixed]

40 P5_4 - Not used

41 P5_3 - Not used

42 P5_2 - Not used

43 P5_1 - Not used

44 P5_0 - Not used

45 P4_7 - Not used

46 P4_6 - Not used

47 NF_CNTL2 I Not used

48 NF_CNTL1 I Not used

49 P4_3 - Not used

50 P4_2 - Not used

51 EDID_WP O Programming control for EDID ROM [Protection =

52 NF_PPON O Not used

53 NF_OC O Not used

54 DET_NF I Not used

55 PFC_POW O Power on/off control for PFC [On = L]

56 CTL_SW O Not used

57 HP_DET I Not used

58 HP_WDOG I Watch dog reset for main CPU

59 P3_1 - Not used

60 VCC2 - +3.3V power supply

61 P3_0 - Not used

62 VSS - GND

63 RESET_TU O Reset for tuner [Reset = L]

64 VCCH_RST O Reset for Vcch of main CPU [Reset = L]

65 RESET%_TRIDENT O Reset for main cpu & flash memory [Reset =

66 RESET_STV8258 O Not used

67 S_MUTE O Speaker output muting [Muting = H]

68 A_MUTE O Audio line output muting [Muting = H]

69 HP_MUTE O Not used

70 MAIN_POWER O Power on/off control for main power supply [On =

71 P1_7 - Not used

72 P1_6 - Not used

73 P1_5 - Not used

74 BKLT_CNTL O Not used

75 P1_3 - Not used

76 REG_SW1 O Power on/off control for regulator IC [On = H



79 P0_7 - Not used

80 P0_6 - Not used

81 SDA_EEP I/O I2C bus (data) for EEPROM

82 SCL_EEP O I2C bus (clock) for EEPROM

83 P0_3 - Not used

84 P0_2 - Not used

85 P0_1 - Not used

86 P0_0 - Not used

87 P10_7 - Not used

88 P10_6 - Not used

89 P10_5 - Not used

90 P10_4 - Not used

91 LB_PRO I Low-B protect detection [Error protection = H

92 P10_2 - Not used

93 KEY2 I Side key scan voltage (MENU/CH+/CH-)

94 AVSS - GND

95 KEY1 I Side key scan voltage (INPUT/VOL+/VOL-)

96 VREF I Reference voltage [H fixed]

97 AVCC - +3.3V power supply

98 P9_7 - Not used

99 P9_6 - Not used

100 P9_5 - Not used

PinNo.

Pin name I/O Function


8/161-8 (No.YA654)

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 POWER CORD COVER.

(3) Remove the POWER CORD.

(4) Remove the 1 screw [B], 12 screws [C] and the 4 screws [D].

(5) Remove the REAR COVER.

3.2.2 REMOVING THE BACK BRACKET (Fig.3-1)

Remove the REAR COVER.

(1) Remove the 6 screws [E].

(2) Remove the BACK BRACKET.

(3) Follow the same steps when removing the other hand

BACK BRACKET.

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

Remove the POWER CORD.


Remove the BACK BRACKET.

(1) Remove the 13 screws [F].

(2) Remove the POWER PWB.

3.2.4 REMOVING THE SIGNAL PWB (Fig.3-1)


Remove the BACK BRACKET.

(1) Remove the 2 screws [G].

(2) Remove the TERMINAL BRACKET.

(3) Remove the 8 screws [H].

(4) Remove the SIGNAL PWB.

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


(1) Remove the 2 screws [J].

(2) Remove the SW PWB.

3.2.6 REMOVING THE CONTROL KNOB (Fig.3-1) Remove the REAR COVER.

Remove the SW PWB.

(1) Remove the 2 screws [K].

(2) Remove the CONTROL KNOB.

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


(1) Remove the 2 hooks [a].

(2) Remove the LED PWB.

3.2.8 REMOVING THE SPEAKER (Fig.3-1)


(1) Remove the 2 screws [L].

(2) Remove the SPEKAER.

(3) Follow the same steps when removing the other hand

SPEAKER.

3.2.9 REMOVING THE STAND (Fig.3-1)

(1) Remove the 4 screws [M].

(2) Remove the STAND.

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


Remove the STAND.

(1) Remove the 4 screws [P], 8 screws [Q] and the 4 screws [R].

(2) Remove the BOTTOM FRAME.

(3) Remove the 2 screws [W].

(4) Remove the MIAN BASE.

(5) Remove the 2 screws [X].

(6) Remove the PANEL BRACKET.

(7) Remove the 6 screws [Y].(8) Remove the SIDE BRACKET.

(9) Remove the 4 screws [Z].

(10) Remove the TOP BRACKET.

(11) Remove the LCD PANEL UNIT from the FRONT PANEL.
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9/16(No.YA654)1

Fig.3-1

FRONT

DD

AA

CC

MM

FF

EE

EE

WW

WW

HH

GG

QQ

PP

QQ

RR

KK

JJ

XX

YY

YY

YY

ZZ

ZZ

XX

LL

LL

aa

BB

REAR COVER

STAND

BOTTOM FRAMESIGNAL PWB

MAIN BASE

SIDE BRACKET

TERMINAL

BASE

POWER PWB

SW PWB

CONTROL KNOB

LED PWB

SPEAKER

FRONT PANEL

LCD PANEL

UNIT

SPEAKER

POWER CORD

POWER CORD COVER

SIDE BRACKET

PANEL

BRACKET

PANEL

BRACKET

TOP BRACKET

TOP BRACKET

BACK

BRACKET

BACK

BRACKET


10/161-10 (No.YA654)

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.

2. Replace the memory IC

Be sure to use a memory IC written with the initial setting data.

3. Power on

Connect the power cord to the wall outlet and switch on the

power.4. Receiving channel setting

Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE)

and set the receive channels (Channels Preset) as described.

5. User settings

Check the user setting items according to the "FACTORY

SETTING ITEM" table.

Where these do not agree, refer to the OPERATING

INSTRUCTIONS (USER'S GUIDE) 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.

3.3.3 SERVICE MODE SETTING ITEMS

Fig.3-4

Simbol Number of pins Mounting PWB Main content of data

IC2001 8-pin SIGNAL PWB Setting data of HDMI-1 is memorized.



IC2503 8-pin SIGNAL PWB Setting value of IC2501(SUB CPU) is memorized.

Setting items Settings Item No.

1.White Blance

Fixed

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

2.White Blance Base

Adjust

R Gain

G Gain

B GainR Offset

G Offset

B Offset

3.M16 EEPROM EDIT Fixed ---

4.I2C Stop Fixed ---

5.Version Fixed ---

Factory Menu

1.White Balance

2.White Balance Base

3.M16 EEPROM EDIT

4.I2C Stop

5.Version

R Gain

G Gain

B Gain

R Offset

G OffsetB Offset

0

0

0

0

00

Select the "2.White Balance Base".

SERVICE MODE SCREEN


11/16(No.YA654)1-

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

PICTURE ADJUSTCustomers can adjust the picture setting of menu screen as their own like but the picture standard value during factory shipment is as below

Setting item Setting position

POWER Off

CHANNEL CABLE-01

VOLUME 20

INPUT TV


INPUT TV

CHANNEL CABLE-01

VOLUME 20

MUTING OFF

DISPLAY OFF

ASPECT NTSC,480i/p: Panorama

720p,1080i/p: Full

SLEEP OFF

VIDEO STATUS Dynamic

SOUND STATUS Speech

Setting item STANDARD DYNAMIC GAME THEATER

Tint 46 47 46 47

Color 80 90 80 74

Picture 50 52 48 48

Bright 36 36 36 40

Detail 35 50 35 0

Backlight 50 100 50 10

Color Temp Natural Cool Cool Warm

Color Management On On On Off

Dynamick Gamma On On Off Off

Smart picture On Off On OnDigital VNR Low Low Low Low

MPEG NR On On On On

Natural Cinema Off Off Off Off

Setting item STANDARD DYNAMIC GAME THEATER

Tint 46 46 46 48

Color 82 95 82 78

Picture 47 52 45 46

Bright 54 46 50 52

Detail 30 35 30 0

Backlight 50 100 50 10Color Temp Natural Cool Cool Warm

Color Management On On On Off

Dynamick Gamma On On Off Off

Smart picture On Off On On

Digital VNR Low Low Low Low

MPEG NR On On On On

Natural Cinema Off Off Off Off


12/161-12 (No.YA654)

DISPLAY

TV

SOUND

POWER

SETTING


Video Input Label Default

Photo Viewer Interval :5

Aspect Ratio NTSC,480i/p Panorama

720p,1080i/p Full


Closed Caption Off

CC Setting Analog CC CC1

Digital CC Service1

Font Default

Font Size Default

Font Style Default

Text Color Default

Text Opacity Default

BG Color Default

BG Opacity Default

Edge Color Default

Tuner Mode Cable

Edit Channel Setting Ch Page

V-Chip Do Not Block


MTS Stereo

Digital Audio(ML) English

Surround Off

Sound Status Speech

STEP100Hz 330Hz 1kHz 3.3kHz 10kHz

USER 0 0 0 0 0

SPEECH 0 2 5 6 2

JAZZ 6 0 -2 2 3

CLASSIC 5 3 2 2 3

ROCK 8 3 0 2 3


Sleep Timer Off

Power Indicator High

Illumination High


Time Zone Pacific

D.S.T. Off

Language English

Noise Mute On

Front Panel Lock Off

Transparency 3

Auto Shut Off Off

Auto Demo No Setting (Auto Start)

Optical Out PCM


13/16(No.YA654)1-

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 th

solder. Then heat and melt the solder at both ends of th

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 th

solder.

(3) First solder lead A as indicated in the figure.

(4) Then solder leads B and C.

SOLDER SOLDER

A

B

C

A

B

C


14/161-14 (No.YA654)

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) [NTSC]

Remote control unit

4.4 SERVICE MODE

4.4.1 HOW TO ENTER THE SERVICE MODE

(1) Set to "OFF" using the [SLEEP] key.

(2) While "OFF" is displayed, press the [V. STATUS] key and

[DISPLAY] key simultaneously.

(3) Enter the SERVICE MODE (Fig.4-1)

(4) Select the 2.White balance base from the SERVICE

MODE.

Fig.4-1

4.4.2 HOW TO EXIT THE SERVICE MODE

Press the [MENU] key to exit the SERVICE MODE.

4.4.3 SERVICE MODE SELECT KEY LOCATION

4.4.4 CHANGE AND MEMORY OF SETTING VALUE

4.4.5 HOW TO STORE OF SETTING VALUE

The setting value will be stored automatically when release the

REMOTE CONTROL UNIT keys.

Setting item Settings

VIDEO STATUS Standard

COLOR TEMP Natural

COLOR MANAGEMENT Off

NATURAL CINEMA Off

ASPECT FULL

Factory Menu

1.White Balance

2.White Balance Base

3.M16 EEPROM EDIT

4.I2C Stop

5.Version

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

0

0

0

0

0

0

Select the "2.White Balance Base".

SERVICE MODE SCREEN

Remocon Key Contents

[] / [] key Change the setting items up/ down.[] / [] key Change the setting values up/down.[OK] key Select the setting items.

[SLLEP]

[MENU]

[DISPLAY]

[V. STATUS]

[ ]

[ ][ ]

[ ]
http://-/?-http://-/?-


15/16(No.YA654)1-

4.4.6 INITIAL SETTING VALUES IN THE SERVICE MODE

Perform fine-tuning based on the "initial values" using the remote control unit 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 achieve

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 the

are fixed values.

4.5 ADJUSTMENT PROCEDURE

Mode Setting itemVariable

range

Initial setting

value

1. White balance

[Do not adjust]

R Gain -100 - 100 0

G Gain -100 - 100 0

B Gain -100 - 100 0

R Offset -100 - 100 0

G Offset -100 - 100 0

B Offset -100 - 100 0

2. White balance Base R Gain -100 - 100 0

G Gain -100 - 100 0

B Gain -100 - 100 0

R Offset -100 - 100 0

G Offset -100 - 100 0

B Offset -100 - 100 0

3.M16 EEPROM EDIT

[Do not adjust]---

4.I2C Stop ---

5.Version ---

ItemMeasuring

instrumentAdjustment part Description

WHITE BALANCE

(HIGHLIGHT)

Remote control unit

Signal generator

[2.White balance Base]

R Gain (Red Gain)G Gain (Green Gain)

B Gain (Blue Gain)

R Offset (Red Offset)

G Offset (Green Offset)

B Offset (Blue Offset)

(1) Receive a NTSC 75% all white signal.

(2) Set "VIDEO STATUS" to "Standard".(3) Set "ASPECT" to "Full".

(4) Select "COLOR TEMP" to "Natural".

(5) Select the 2.White balance base from the SERVIC

MODE.

(6) Set the setting value of (Red Offset), (Green Offset) and (Blue Offset) to 0

(7) Adjust to keep one of (Red Gain), (Green Gain) or(Blue Gain) unchanged

then lower the other two so that the all-white screen

equally white throughout.

NOTE:

Set one or more of, < G Gain> and


16/16

(N YA654 R 001 )

SECTION 5

TROUBLESHOOTING

5.1 SELF CHECK FUNCTIONS

5.1.1 OUTLINE

This model has a self check function given below. When an abnormality has been detected, the power is turned off and the POWER LED

flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer.

5.1.2 SELF CHECK ITEMS

5.1.3 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT

In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.

If an error is detected, the power is turned off.

Shortly after the power is turned off, the POWER LED will be blinked.

Power cannot be turned on until the power cord takes out and inserts, after the power is turned off.

Detection item Detection contentDiagnosis

signal (line)Detection timing

Low bias line

short protection

Confirm the operation of the low bias (3.3V/5V/

12V/24V) protection circuit.

3.3V: Q7004 [SIGNAL PWB]

5V: Q7003 [SIGNAL PWB]

12V: Q7001 [SIGNAL PWB]

24V: IC7019 [SIGNAL PWB]

LB_PRO At 10 seconds after the power is turned on, the

self-check function starts. If NG is detected during

3000ms, the power is turned off automatically.

Type of error POWER LED flash cycle

Low bias line short protection LED turning on and off at 2 seconds intervals.

Victor Company of Japan, LimitedDisplay Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan

Documents

LT-52X579_KA Ch.FN3 (sm-YA654_Rev.001)