JVC LT-42FX77, LT-42FX77/S, LT-42FX77/B, LT-42FX77/BA Service Manual

SERVICE MANUAL

YA564<Rev.001>200710SERVICE MANUAL

LT-42FX77, LT-42FX77/B,

WIDE LCD TELEVISION

LT-42FX77

/BA, LT-42FX77/S

BASIC CHASSIS

FL4

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

TABLE OF CONTENTS

No.YA564<Rev.001>

2007/10

SPECIFICATION

Items Contents

Dimensions ( W × H × D ) 100.7 cm × 70.7 cm × 29.6 cm [Included stand]

100.7 cm × 66.0 cm × 13.0 cm [TV only]

Mass 30.0 kg [Included stand]

24.0 kg [TV only]

Power Input AC110V - AC240 V, 50 Hz / 60 Hz

Power Consumption 218 W (Standby:0.5 W)

TV RF System B, G, I, D, K, K1, M

Colour System PAL / SECAM / NTSC 3.58 / NTSC 4.43

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

Teletext System FLOF (Fastext), WST (World Standard System)

Receiving Frequency

Intermediate Frequency VIF

Colour Sub Carrier

LCD panel 42V-inch wide aspect (16 : 9)

Screen Size Diagonal: 107.0 cm (H: 93.1 cm × V: 52.4 cm) Display Pixels Horizontal: 1366 dots × Vertical: 768 dots (W-XGA)

Audio Power Output 10 W + 10 W

Speaker 4.0 cm × 16.0 cm, Twin Oblique cone × 2 Aerial terminal (VHF/UHF) 75 Ω unbalanced, coaxial

Video / Audio Input-1/2/3

Video / Audio Output S-Video Mini-DIN 4 pin connector × 1

HDMI Input Video HDMI connector × 2

PC (RGB) Input D-sub 15 pin × 1

Headphone 3.5 mm stereo mini jack × 1 Remote Control Unit RM-C1855 (AAA/R03 dry cell battery × 2)

Component Video

625p / 525p / 625i / 525i

VHF Low

VHF High

SECAM

[Input-1/3]

750p / 1125i

S-Video

[Input-1/2]

Design & specifications are subject to change without notice.

46.25MHz - 140.25MHz

147.25MHz - 423.25MHz

431.25MHz - 863.25MHz

UHF

Mid (X - Z+2, S1 - S10) / Super (S11 - S20) / Hyper (S21 - S41) bands

CATV

38.0MHz (B, G, I, D, K, L)

SIF

32.26MHz (5.74MHz: B), 32.15MHz (5.85MHz: G), 31.45MHz (6.55MHz: I)

31.75MHz (6.25MHz: D), 32.15MHz (5.85MHz: K)

4.43MHz

PAL

4.40625MHz / 4.25MHz

3.58MHz / 4.43MHz

NTSC

RCA pin jack × 6 (Input-3) Y: 1V (p-p) (Sync signal: ±0.35V(p-p), 3-value sync.), 75 Ω / Pb/Pr: ±0.35V(p-p), 75 Ω Y: 1V (p-p), Positive (Negative sync provided), 75 Ω / Pb/Pr: 0.7V(p-p), 75 Ω

Mini-DIN 4 pin connector × 2 Y: 1V (p-p), Positive (Negative sync provided), 75 Ω

C: 0.286V (p-p) (Burst signal), 75 Ω Video 1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 3 Audio 500mV (rms), High impedance, RCA pin jack × 6

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

C: 0.286V (p-p) (Burst signal), 75 Ω Video 1V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 1 Audio 500mV (rms), Low impedance, RCA pin jack × 2

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

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

R/G/B: 0.7 V (p-p), 75Ω

HD / VD: 1 V (p-p) to 5 V (p-p), high impedance

< Available signal >

VGA: 640 pixels × 480 pixels (Horizontal: 31.5 kHz / Vertical: 60 Hz)

XGA: 1024 pixels × 768 pixels (Horizontal: 48.4 kHz / Vertical: 60 Hz)

1-2 (No.YA564<Rev.001>)

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 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor

between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to

0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER (HAVING 1000 /V, OR MORE SENSITIVITY)

0.15 F AC-TYPE

GOOD EARTH GROUND

1500 10W

PLACE THIS PROBE ON EACH EXPOSED ME TAL PAR T

(No.YA564<Rev.001>)1-3

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.

1.2.3 INSTALLATION REQUIREMENTS

To ensure safety in an emergency such as an earthquake, and to prevent accidents, ensure that measures are taken to prevent the TV dropping or falling over.

It fixes in a band.

Ventilation hole

*Diagram differs from actual appearance.

1.2.2 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.

200 mm

TV STAND

*Diagram differs from actual appearance.

1.2.4 NOTES ON HANDLING

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.

150 mm 50

*Diagram differs from actual appearance.

150 mm 50 mm

1-4 (No.YA564<Rev.001>)

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).

(No.YA564<Rev.001>)1-5

SECTION 2

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 00 00

SPECIFIC SERVICE INSTRUCTIONS

2.1 SYSTEM SETTING

Be sure to carry out the following operation at the end of the procedure.

SERVICE MENU SCREEN

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

simultaneously, then enter the SERVICE MODE.

(2) When the Main Menu is displayed, press [2] key to enter

the self check mode.

(3) Turn off the power by pressing the [POWER] key on the

remote control unit.

2.2 FEATURES

Clear Motion Drive

This function is able to display twice as many frames as a conventional LCD display.

D.I.S.T. (Digital Image Scaling Technology)

This system uses line interpolation to double the number of scanning lines and achieve high resolution, flicker-free picture.

Colour Management

This function ensures dull colours are compensated to produce natural hues.

2.3 MAIN DIFFERENCE LIST

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

SELF CHECK MODE SCREEN

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 00 00

Picture Management

This function makes it easier to see the dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas.

Smart Picture

This function detects the APL (Average Picture Level) and adjusts the contrast suitable for what you are watching.

DIGITAL VNR

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

MPEG Noise Reduction

This function effects the block noise removal and mosquito NR simultaneously.

Item LT-42FX77 LT-42FX77/B LT-42FX77/BA LT-42FX77/S

POWER CORD EU Type (2 Pins) EU Type (2 Pins) Flat type (2 Pins) UK Type (3 Pins)

1-6 (No.YA564<Rev.001>)

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.

Item Specifications

Maximum dimensions ( W × H × D ) 98.3 cm × 57.6 cm × 5.2 cm

Weight 15.0 kg

Effective screen size Diagonal: 1050 mm (H: 930.25 mm × V: 523.01 mm)

Aspect ratio 16 : 9

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

Resolution Horizontally 1366 × Vertically 768 × RGB <W-XGA> 3147264 dots in total

Pixel pitch (pixel size) Horizontally: 0.681 mm, Vertically: 0.681 mm

Displayed colour 16777216 colours 256 colours for R G and B

Brightness 500cd/m

Contrast ratio 1500 : 1

Response time (Tr) less than 8 ms

View angle (Horizontally) 178° View angle (Vertically) 178°

Surface polarizer Anti-Glare type Low reflective coat

Colour filter Vertical stripe

Backlight Cold cathode fluorescent lamp × 20

Power supply voltage in LCD 12 V

Power supply voltage in inverter 24 V

Panel interface system LVDS (Low Voltage Differential Signaling)

2.4.1.2 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.

(No.YA564<Rev.001>)1-7

2.4.2 MAIN CPU PIN FUNCTION [IC7301

Pin Pin name I/O Function Pin Pin name I/O Function

1 TCK O Test purpose 65 D2 I/O Program ROM data for main CPU 2 TMS I Test purpose 66 D12 I/O Program ROM data for main CPU 3 TDI I Test purpose 67 D10 I/O Program ROM data for main CPU 4 TDO O Test purpose 68 VSS33 - GND 5 P2.8 O TV, Subtitle/OTHER 69 VDD33 I 3.3V 6 P2.9 O Blue for OSD 70 D4 I/O Program ROM data for main CPU 7 P2.10 O Blue for OSD 71 D3 I/O Program ROM data for main CPU 8 P2.11 O Blue for OSD 72 D11 I/O Program ROM data for main CPU

9 P2.12 O Blue for OSD 73 RSTIN I Reset 10 P2.13 O Blue for OSD 74 POWER O Sleep state release for chassis CPU [Relese : L] 11 P2.14 I Not used 75 P3.1 O Not used 12 P2.15 O Request for chassis CPU communication 76 REMOCON I Remote control 13 VSS33 - GND 77 P3.3 I Clock for OSD 14 VDD33 I 3.3V 78 P3.4 O Red for OSD 15 P4.5 O Not used 79 P3.5 O Red for OSD 16 A20 O Program ROM address for main CPU 80 P3.6 O Red for OSD 17 A19 O Program ROM address for main CPU 81 P3.7 O Red for OSD 18 A18 O Program ROM address for main CPU 82 MTST I/O Data transmission for chassis CPU communication 19 A17 O Program ROM address for main CPU 83 MTSR I/O Data receive for chassis CPU communication 20 VSS25 - GND 84 VSS33 - GND 21 VDD25 I 2.5V 85 VDD33 I 3.3V 22 A16 O Program ROM address for main CPU 86 VSS25 - GND 23 A8 O Program ROM address for main CPU 87 VDD25 I 2.5V 24 A7 O Program ROM address for main CPU 88 TXD0 I/O Not used 25 A9 O Program ROM address for main CPU 89 RXD0 I/O Not used 26 A6 O Program ROM address for main CPU 90 P3.12 O Red for OSD 27 A5 O Program ROM address for main CPU 91 CLK O Clock for chassis CPU communication 28 A10 O Program ROM address for main CPU 92 P3.15 O Green for OSD 29 A11 O Program ROM address for main CPU 93 P5.14 O Green for OSD 30 A12 O Program ROM address for main CPU 94 P5.15 O Green for OSD 31 VSS33 - GND 95 TRIG_IN O Green for OSD 32 VDD33 I 3.3V 96 TRIG_OUT O Green for OSD 33 A4 O Program ROM address for main CPU 97 P6.2 O Green for OSD 34 A3 O Program ROM address for main CPU 98 P6.3 I/O I 35 A2 O Program ROM address for main CPU 99 P6.4 I/O I 36 A1 O Program ROM address for main CPU 100 P6.5 O Teletext signal select [Analog RGB : H / Digital RGB : L] 37 A0 O Program ROM address for main CPU 101 IRQ O Not used 38 A13 O Program ROM address for main CPU 102 VSYNC I/O Vertical sync 39 ARAS/A14 O Program ROM address for main CPU 103 HSYNC I/O Horizontal sync 40 CAS/A15 O Program ROM address for main CPU 104 41 VSS33 - GND 105 BLANK O Ys for OSD / Teletext 42 VDD33 I 3.3V 106 VDD33 I 3.3V 43 MEMCLK O Clock for memory 107 VSS33 - GND 44 CSSDRAM O Chip select for memory 108 XTAL1 I 6MHz for system clock 45 CLKEN O Clock enable for memory 109 XTAL2 O 6MHz for system clock 46 CSROM O Chip select for memory 110 VSSA - GND 47 RD O Read for memory 111 VDDA I 2.5V 48 UDQM O Control buffer of memory 112 R O R for OSD / Teletext 49 LDQM O Control buffer of memory 113 G O G for OSD / Teletext 50 WR O Write for memory 114 B O B for OSD / Teletext 51 D15 I/O Program ROM data for main CPU 115 VSSA - GND 52 VSS33 - GND 116 VDDA I 2.5V 53 VDD33 I 3.3V 117 CVBS2 I Video for Teletext 54 D7 I/O Program ROM data for main CPU 118 VSSA - GND 55 D0 I/O Program ROM data for main CPU 119 VDDA I 2.5V 56 D14 I/O Program ROM data for main CPU 120 CVBS1B I Video for Teletext 57 D8 I/O Program ROM data for main CPU 121 CVBS1A I Video for Teletext 58 D6 I/O Program ROM data for main CPU 122 VSSA - GND 59 D1 I/O Program ROM data for main CPU 123 VDDA I 2.5V 60 VSS33 - GND 124 KEY1 I Key scan data 1 [ON : H] 61 VDD33 I 3.3V 125 KEY2 I Key scan data 2 [ON : H] 62 D13 I/O Program ROM data for main CPU 126 MECA_SW I Main power ON / OFF control [ON : L] 63 D9 I/O Program ROM data for main CPU 127 64 D5 I/O Program ROM data for main CPU 128 TMODE I Test purpose

: DIGITAL PWB]

COR/RSTOUT

(KEYP2)P5.3

C bus clock (for main memory)

C bus Data (for main memory)

O Not used

I Not used

1-8 (No.YA564<Rev.001>)

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

• Be sure to perform the SYSTEM SETTING, at the end of the procedure.

• Make sure that the power cord is disconnected from the outlet.

• Pay special attention not to break or damage the parts.

• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.

REFERENCE:

When removing each board, remove the connector if necessary. The operation is easier if you write down the connection points (connector numbers) of the connector. For connection of each board, refer to the "WIRING DIAGRAM" of the Standard Circuit Diagram.

3.1.1 REMOVING THE REAR COVER (Fig.3-1)

(1) Remove the 1 screw [A]. (2) Remove the POWER CORD COVER. (3) Remove the POWER CORD. (4) Remove the 1 screw [B], 9 screws [C], 6 screws [D] and 5

screws [E].

(5) Remove the REAR COVER.

3.1.2 REMOVING THE D-AMP PWB

• Remove the REAR COVER. (1) Remove the 3 screws [F]. (2) Remove the BACK BRACKET. (3) Remove the 2 screws [G]. (4) Remove the D-AMP PWB.

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

• Remove the REAR COVER.

• Remove the D-AMP PWB.

• Remove the BACK BRACKET. (1) Remove the 1 screw [H]. (2) Remove the TUNER BASE. (3) Remove the 3 hooks [a], 3 screws [I] and 7 screws [J]. (4) Remove the TERMINAL BASE. (5) Remove the 2 screws [K]. (6) Remove the D-AMP PWB BRACKET. (7) Remove the 3 screws [L] and 2 screws [M]. (8) Remove the ANALOG PWB.

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

• Remove the REAR COVER.

• Remove the BACK BRACKET. (1) Remove the 3 screws [N]. (2) Remove the DC-DC PWB.

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

• Remove the REAR COVER. (1) Remove the 3 screws [O]. (2) Remove the BACK BRACKET. (3) Remove the 11 screws [P]. (4) Remove the POWER PWB.

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

• Remove the REAR COVER. (1) Remove the 1 screw [Q]. (2) Remove the KNOB BASE. (3) Remove the 2 screws [R]. (4) Remove the SW PWB.

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

• Remove the REAR COVER.

• Remove the BACK BRACKET. (1) Remove the 11 hooks [b]. (2) Remove the SHIELD COVER. (3) Remove the 2 screws [R] and 2 screws [S]. (4) Remove the SHIELD TERMINAL. (5) Remove the 9 screws [T]. (6) Remove the DIGITAL PWB.

CAUTION :

Make sure to perform the "SYSTEM SETTING", when DIGITAL PWB is replaced.

3.1.8 REMOVING THE SPEAKER (Fig.3-1)

• Remove the REAR COVER. (1) Remove the 3 screws [U]. (2) Remove the SPEKAER. (3) Follow the same steps when removing the other

SPEAKER.

3.1.9 REMOVING THE STAND ASS'Y (Fig.3-1)

(1) Remove the 1 screw [B] and 4 screws [V]. (2) Remove the STAND ASS'Y.

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

• Remove the REAR COVER.

• Remove the STAND ASS'Y. (1) Remove the 5 screws [W] and 2 screws [X]. (2) Remove the STAND BASE SUPPORT. (3) Remove the 2 hooks [c]. (4) Remove the LED PWB.

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

• Remove the REAR COVER.

• Remove the STAND ASS'Y.

• Remove the STAND BASE SUPPROT.

• Remove the SPEKAER. (1) Remove the 4 screws [Y] and 6 screws [Z] . (2) Remove the MAIN BASE. (3) Remove the 2 screws [AA]. (4) Remove the SIDE BRACKET. (5) Follow the same steps when removing the other SIDE

BRACKET. (6) Remove the 2 screws [AB]. (7) Remove the TOP FRAME in the direction of the arrow. (8) Remove the LCD PANEL UNIT from the FRONT PANEL.

CAUTION:

The LCD PANEL UNIT is fixed to the FRONT PANEL (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.YA564<Rev.001>)1-9

POWER CORD

POWER CORD COVER

D-AMP PWB BRACKET

TERMINAL BASE

SHIELD COVER

SHIELD TERMINAL

REAR COVER

BACK BRACKET

DIGITAL PWB

SHIELD TERMINAL

BACK BRACKET

DC-DC PWB

POWER PWB

KNOB BASE

CONTROL

KNOB

SIDE BRACKET

SW PWB

MAIN BASE

SIDE BRACKET

TOP FRAME

FRONT PANEL

TUNER BASE

TOP FRAME

SIDE BRACKET

LCD PANEL UNIT

STAND BASE

SUPPORT

STAND ASS'Y

LED PWB

SPEAKER

Fig.3-1

1-10 (No.YA564<Rev.001>)

3.1.12 REMOVING THE LCD CONTROL PWB (Fig.3-2)

• Remove the REAR COVER.

• Remove the STAND ASS'Y.

• Remove the STAND BASE SUPPROT.

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

3.1.13 REMOVING THE INVERTER PWB (Fig.3-2)

• Remove the REAR COVER. (1) Remove the 5 screws [B]. (2) Remove the INVERTER PWB COVER. (3) Remove the INVERTER PWB. (4) Follow the same steps when removing the other hand

INVERTER PWB.

LCD CONTROL PWB COVER

INVERTER PWB(MASTER)

COVER

INVERTER PWB(MASTER)

LCD CONTROL PWB

INVERTER PWB(SLAVE)

COVER

INVERTER PWB(SLAVE)

FRONT

Fig.3-2

(No.YA564<Rev.001>)1-11

3.2 MEMORY IC REPLACEMENT

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

S001 R DRIVE 137 PAL50 FULL STD H

• This model uses the memory IC.

• This memory IC stores data for proper operation of the video and drive circuits.

• When replacing, be sure to use an IC containing this (initial value) data.

3.2.1 MEMORY IC TABLE

Symbol Number of pins Mounting PWB Main content of data

IC7201

IC7602

48-pin DIGITAL PWB Progaram(Video process) of IC6001(System CPU) is memorized.

8-pin DIGITAL PWB Setting value of IC7301(MAIN CPU) is memorized.

3.2.2 MEMORY IC REPLACEMENT PROCEDURE

1. Power off

Switch off the power and disconnect the power plug from the AC outlet.

2. Replace the memory IC

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

3. Power on

Connect the power plug to the AC outlet and switch on the power.

4. Receiving channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.

5. User setting

Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items as described.

6. SERVICE MODE setting

Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.

3.2.3 SERVICE MODE SETTING

SERVICE MODE SCREEN

MAIN MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

ADJUSTMENT MODE SCREEN

S001 R DRIVE 137 PAL50 FULL STD H

SETTING ITEM

Setting items Settings Item No.

Video system setting Adjust S001 - S009

(Not used) Fixed T001 - T003

(Not used) Fixed M001 - M224

(Not used) Fixed F001 - F002

(Not used) Fixed D001

(Not used) Fixed Z001

Fig.1

1-12 (No.YA564<Rev.001>)

3.2.4 SETTINGS OF FACTORY SHIPMENT

3.2.4.1 BUTTON OPERATION 3.2.4.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

CHANNEL PR01

VOLUME 10

CHANNEL PR01

VOLUME 10

ZOOM Panoramic

Setting item Setting position

TV/AV TV

3.2.4.3 REMOTE CONTROL MENU OPERATION

(1) PICTURE

Setting item Setting position

Picture Mode Bright

White Balance Cool

Features

Super Digipure Auto

Pull Down Auto

Colour Management On

Picture Management On

Smart Picture Off

MPEG Noise Reduction On

Colour System Main Depends on PR

Sub Auto

Zoom Panoramic

(4) FEATURES

Setting item Setting position

Sleep Timer Off

Channel Guard Off(ID: 0000)

Appearance Type A

Blue Back On

Child Lock Off

Auto Shutoff Off

Favourite Setting Blank

Power Lamp On

Eco sensor Off

(5) SET UP

Setting item Setting position

Auto Program Tv Channel Automatically Set

(2) SOUND

Setting item Setting position

Stereo / I•II Stereo Sound

Bass Centre

Treble Centre

Balance Centre

Cinema Surround Off

MaxxBass Low

Voice Enhancer Off

Edit/manual Preset Ch Only

Language English

VIDEO-1 Setting Component

VIDEO-3 Setting Component

AI Volume On

Teletext Language Group-1

Hdmi Setting Auto

PC Position Center

Auto Demonstration Off

(No.YA564<Rev.001>)1-13

3.3 REPLACEMENT OF CHIP COMPONENT

3.3.1 CAUTIONS

(1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it.

3.3.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it. (2) A 30w soldering iron is recommended for easily removing parts.

3.3.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2) Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

[Resistors, capacitors, etc.]

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the

solder.

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

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

NOTE :

After removing the part, remove remaining solder from the pattern.

1-14 (No.YA564<Rev.001>)

(4) Then solder leads B and C.

SECTION 4

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the

REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.

(2) The adjustment using the REMOTE CONTROL UNIT is

made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

(3) Make sure that connection is correctly made AC to AC

power source.

(4) Turn on the power of the TV and measuring instruments for

warming up for at least 30 minutes before starting adjustments.

(5) If the receive or input signal is not specified, use the most

appropriate signal for adjustment.

(6) Never touch the parts (such as variable resistors,

transformers and condensers) not shown in the adjustment items of this service adjustment.

4.2 PRESET SETTING BEFORE ADJUSTMENTS

Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.

Setting item Settings position

Picture Mode Standard

Picture Adjustments Centre

White Balance Mid

Super Digipure Auto

Pull Down Auto

Colour Management On

Picture Management On

Zoom Full

4.3 MEASURING INSTRUMENT AND FIXTURES

• Signal generator (Pattern generator) [PAL]

• Remote control unit

4.5 BASIC OPERATION OF SERVICE MODE

4.5.1 HOW TO ENTER THE SERVICE MODE

(1) Press [DISPLAY] key and [MUTING] key on the remote

control unit simultaneously to enter the SERVICE MODE SCREEN.

(2) In the SERVICE MENU, press the [1] key to display

ADJUSTMENT MODE SCREEN.

SERVICE MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

NOTE:

• Before enter the SERVICE MODE, press the [MODE] key to

confirm that "TV" position is indicated. If it is in a wrong position, the SERVICE MODE operation cannot be performed.

• When a number key other than the [1] key is pressed in the

SERVICE MODE SCREEN, the other relevant screen may be displayed. This is not used in the adjustment procedure. Press the

[MENU] key to return to the SERVICE MODE SCREEN.

4.5.2 HOW TO EXIT THE SERVICE MODE

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

4.5.3 SERVICE MODE SELECT KEY LOCATION

[MUTING] key

[Nunber] key

4.4 ADJUSTMENT ITEMS

 VIDEO CIRCUIT

• WHITE BALANCE (HIGH LIGHT) adjustment

[RETURN+] key

[Red] key

[MODE] key

[Function/] key

[DISPLAY] key

[Green] key

[MENU] key

[FUNCTION /] key

(No.YA564<Rev.001>)1-15

4.5.4 ADJUSTMENT MODE

S001 R DRIVE 137 PAL50 FULL STD H

This mode is used to adjust the VIDEO CIRCUIT and the MTS CIRCUIT.

4.5.4.1 HOW TO ENTER THE ADJUSTMENT MODE When the SERVICE MENU SCREEN of SERVICE MODE is displayed, press [1] key to enter the ADJUSTMENT MODE.

4.5.5 DESCRIPTION OF STATUS DISPLAY

MULTI SCREEN

M2 : 2-pictures multi

ADJUSTMENT MODE

SETTING ITEM No.

SETTING ITEM

SETTING VALUE (DATA)

M12 : 12-pictures multi

(3) PICTURE MODE

SOFT : SOFT STD : STANDARD BRI : BRIGHT

S001 R DRIVE 137 PAL50 FULL STD H

SIGNAL SYSTEM

ZOOM MODE

PICTURE MODE

WHITE BALANCE

(1) SIGNAL SYSTEM

The signal displayed on the screen is displayed.

PAL50 : PAL50Hz (Composite / S-video) PAL60 : PAL60Hz (Composite / S-video) SECAM : SECAM NTSC3 : NTSC3.58 NTSC4 : NTSC4.43 525I : 525i (Component) 525P : 525p 625I : 625i (Component) 625P : 625p 750P : 750p 1125I5 : 1125i 50Hz 1125I6 : 1125i 60Hz RGB5 : RGB 525i RGB6 : RGB 625i PCVGA : PC (VGA) PCXGA : PC (XGA) H525I : HDMI 525i H525P : HDMI 525p H625I : HDMI 625i H625P : HDMI 625p H750P : HDMI 750p H125I5 : HDMI 1125i 50Hz H125I6 : HDMI 1125i 60Hz

--- : OTHER

(2) ZOOM MODE

State of the SCREEN SIZE or MULTI PICTURE is displayed.

SINGLE SCREEN

FULL : FULL PANO : PANORAMIC 1609 : 16:9 ZOOM 1609S : 16:9 ZOOM SUBTITLE 1409 : 14:9 ZOOM REGU : REGULAR

(4) WHITE BALANCE

H: COOL M: MID L: WARM

(5) SETTING ITEM NAME

Setting item name are displayed. For the setting item names to be displayed, refer to "INITIAL SETTING VALUES IN THE SERVICE MODE".

(6) SETTING ITEM NO.

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

Item No. Setting item

S001 - S009 Video system setting

T001 - T003 (NOT USED)

M001 - M224 (NOT USED)

F001 - F002 (NOT USED)

D001 (NOT USED)

Z001 (NOT USED)

(7) SETTING VALUE (DATA)

The SETTING VALUE is displayed.

4.5.6 CHANGE AND MEMORY OF SETTING VALUE

SELECTION OF SETTING ITEM

• [FUNCTION /] key.

For scrolling up / down the setting items.

S001...S009 ↔ T001...T003 ↔ M001...M224 ↔ F001...F002 ↔ D001 ↔ Z001↔return to S001

CHANGE OF SETTING VALUE (DATA)

• [FUNCTION /] key.

For scrolling up / down the setting values.

MEMORY OF SETTING VALUE (DATA)

Changed setting value is memorized by pressing [MUTING] key.

1-16 (No.YA564<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. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They are fixed values.

4.6.1 VIDEO SYSTEM SETTING

Item No. Item Variable range Setting value

S001 R DRIVE 0 - 255 137

S002 G DRIVE 0 - 255 137

S003 B DRIVE 0 - 255 137

S004 RESREV 0 - 255 ---

S005 RESREV 0 - 255 ---

S006 RESREV 0 - 255 ---

S007 RESREV 0 - 255 ---

S008 RESREV 0 - 255 ---

S009 RESREV 0 - 255 ---

4.6.2 NOT USED ITEM (All values are Fixed values)

Item No. Item Variable range Setting value

T001 RESREV 0 - 15 ---

T002 RESREV 0 - 63 ---

T003 RESREV 0 - 63 ---

M001 1E00 00 - FF ---

M002 1E01 00 - FF ---

M003 1E02 00 - FF ---

M004 1E03 00 - FF ---

M005 1E04 00 - FF ---

M006 1E05 00 - FF ---

M007 1E06 00 - FF ---

M008 1E07 00 - FF ---

M009 1E08 00 - FF ---

M010 1E09 00 - FF ---

M011 1E0A 00 - FF ---

M012 1E0B 00 - FF ---

M013 1E0C 00 - FF ---

M014 1E0D 00 - FF ---

M015 1E0E 00 - FF ---

M016 1E0F 00 - FF ---

M017 1E10 00 - FF ---

M018 1E11 00 - FF ---

M019 1E12 00 - FF ---

M020 1E13 00 - FF ---

M021 1E14 00 - FF ---

M022 1E15 00 - FF ---

M023 1E16 00 - FF ---

M024 1E17 00 - FF ---

M025 1E18 00 - FF ---

M026 1E19 00 - FF ---

M027 1E1A 00 - FF ---

M028 1E1B 00 - FF ---

M029 1E1C 00 - FF ---

Item No. Item Variable range Setting value

M030 1E1D 00 - FF ---

M031 1E1E 00 - FF ---

M032 1E1F 00 - FF ---

M033 1E20 00 - FF ---

M034 1E21 00 - FF ---

M035 1E22 00 - FF ---

M036 1E23 00 - FF ---

M037 1E24 00 - FF ---

M038 1E25 00 - FF ---

M039 1E26 00 - FF ---

M040 1E27 00 - FF ---

M041 1E28 00 - FF ---

M042 1E29 00 - FF ---

M043 1E2A 00 - FF ---

M044 1E2B 00 - FF ---

M045 1E2C 00 - FF ---

M046 1E2D 00 - FF ---

M047 1E2E 00 - FF ---

M048 1E2F 00 - FF ---

M049 1E30 00 - FF ---

M050 1E31 00 - FF ---

M051 1E32 00 - FF ---

M052 1E33 00 - FF ---

M053 1E34 00 - FF ---

M054 1E35 00 - FF ---

M055 1E36 00 - FF ---

M056 1E37 00 - FF ---

M057 1E38 00 - FF ---

M058 1E39 00 - FF ---

M059 1E3A 00 - FF ---

M060 1E3B 00 - FF ---

M061 1E3C 00 - FF ---

M062 1E3D 00 - FF ---

M063 1E3E 00 - FF ---

M064 1E3F 00 - FF ---

M065 1E40 00 - FF ---

M066 1E41 00 - FF ---

M067 1E42 00 - FF ---

M068 1E43 00 - FF ---

M069 1E44 00 - FF ---

M070 1E45 00 - FF ---

M071 1E46 00 - FF ---

M072 1E47 00 - FF ---

M073 1E48 00 - FF ---

M074 1E49 00 - FF ---

(No.YA564<Rev.001>)1-17

Item No. Item Variable range Setting value

M075 1E4A 00 - FF ---

M076 1E4B 00 - FF ---

M077 1E4C 00 - FF ---

M078 1E4D 00 - FF ---

M079 1E4E 00 - FF ---

M080 1E4F 00 - FF ---

M081 1E50 00 - FF ---

M082 1E51 00 - FF ---

M083 1E52 00 - FF ---

M084 1E53 00 - FF ---

M085 1E54 00 - FF ---

M086 1E55 00 - FF ---

M087 1E56 00 - FF ---

M088 1E57 00 - FF ---

M089 1E58 00 - FF ---

M090 1E59 00 - FF ---

M091 1E5A 00 - FF ---

M092 1E5B 00 - FF ---

M093 1E5C 00 - FF ---

M094 1E5D 00 - FF ---

M095 1E5E 00 - FF ---

M096 1E5F 00 - FF ---

M097 1E60 00 - FF ---

M098 1E61 00 - FF ---

M099 1E62 00 - FF ---

M100 1E63 00 - FF ---

M101 1E64 00 - FF ---

M102 1E65 00 - FF ---

M103 1E66 00 - FF ---

M104 1E67 00 - FF ---

M105 1E68 00 - FF ---

M106 1E69 00 - FF ---

M107 1E6A 00 - FF ---

M108 1E6B 00 - FF ---

M109 1E6C 00 - FF ---

M110 1E6D 00 - FF ---

M111 1E6E 00 - FF ---

M112 1E6F 00 - FF ---

M113 1E70 00 - FF ---

M114 1E71 00 - FF ---

M115 1E72 00 - FF ---

M116 1E73 00 - FF ---

M117 1E74 00 - FF ---

M118 1E75 00 - FF ---

M119 1E76 00 - FF ---

M120 1E77 00 - FF ---

M121 1E78 00 - FF ---

M122 1E79 00 - FF ---

M123 1E7A 00 - FF ---

M124 1E7B 00 - FF ---

Item No. Item Variable range Setting value

M125 1E7C 00 - FF ---

M126 1E7D 00 - FF ---

M127 1E7E 00 - FF ---

M128 1E7F 00 - FF ---

M129 1E80 00 - FF ---

M130 1E81 00 - FF ---

M131 1E82 00 - FF ---

M132 1E83 00 - FF ---

M133 1E84 00 - FF ---

M134 1E85 00 - FF ---

M135 1E86 00 - FF ---

M136 1E87 00 - FF ---

M137 1E88 00 - FF ---

M138 1E89 00 - FF ---

M139 1E8A 00 - FF ---

M140 1E8B 00 - FF ---

M141 1E8C 00 - FF ---

M142 1E8D 00 - FF ---

M143 1E8E 00 - FF ---

M144 1E8F 00 - FF ---

M145 1E90 00 - FF ---

M146 1E91 00 - FF ---

M147 1E92 00 - FF ---

M148 1E93 00 - FF ---

M149 1E94 00 - FF ---

M150 1E95 00 - FF ---

M151 1E96 00 - FF ---

M152 1E97 00 - FF ---

M153 1E98 00 - FF ---

M154 1E99 00 - FF ---

M155 1E9A 00 - FF ---

M156 1E9B 00 - FF ---

M157 1E9C 00 - FF ---

M158 1E9D 00 - FF ---

M159 1E9E 00 - FF ---

M160 1E9F 00 - FF ---

M161 1EA0 00 - FF ---

M162 1EA1 00 - FF ---

M163 1EA2 00 - FF ---

M164 1EA3 00 - FF ---

M165 1EA4 00 - FF ---

M166 1EA5 00 - FF ---

M167 1EA6 00 - FF ---

M168 1EA7 00 - FF ---

M169 1EA8 00 - FF ---

M170 1EA9 00 - FF ---

M171 1EAA 00 - FF ---

M172 1EAB 00 - FF ---

M173 1EAC 00 - FF ---

M174 1EAD 00 - FF ---

1-18 (No.YA564<Rev.001>)

Item No. Item Variable range Setting value

M175 1EAE 00 - FF ---

M176 1EAF 00 - FF ---

M177 1EB0 00 - FF ---

M178 1EB1 00 - FF ---

M179 1EB2 00 - FF ---

M180 1EB3 00 - FF ---

M181 1EB4 00 - FF ---

M182 1EB5 00 - FF ---

M183 1EB6 00 - FF ---

M184 1EB7 00 - FF ---

M185 1EB8 00 - FF ---

M186 1EB9 00 - FF ---

M187 1EBA 00 - FF ---

M188 1EBB 00 - FF ---

M189 1EBC 00 - FF ---

M190 1EBD 00 - FF ---

M191 1EBE 00 - FF ---

M192 1EBF 00 - FF ---

M193 1EC0 00 - FF ---

M194 1EC1 00 - FF ---

M195 1EC2 00 - FF ---

M196 1EC3 00 - FF ---

M197 1EC4 00 - FF ---

M198 1EC5 00 - FF ---

M199 1EC6 00 - FF ---

M200 1EC7 00 - FF ---

M201 1EC8 00 - FF ---

M202 1EC9 00 - FF ---

M203 1ECA 00 - FF ---

M204 1ECB 00 - FF ---

Item No. Item Variable range Setting value

M205 1ECC 00 - FF ---

M206 1ECD 00 - FF ---

M207 1ECE 00 - FF ---

M208 1ECF 00 - FF ---

M209 1ED0 00 - FF ---

M210 1ED1 00 - FF ---

M211 1ED2 00 - FF ---

M212 1ED3 00 - FF ---

M213 1ED4 00 - FF ---

M214 1ED5 00 - FF ---

M215 1ED6 00 - FF ---

M216 1ED7 00 - FF ---

M217 1ED8 00 - FF ---

M218 1ED9 00 - FF ---

M219 1EDA 00 - FF ---

M220 1EDB 00 - FF ---

M221 1EDC 00 - FF ---

M222 1EDD 00 - FF ---

M223 1EDE 00 - FF ---

M224 1EDF 00 - FF ---

F001 DD 0 - 1 ---

F002 RAM REF 0 - 1 ---

D001 RESREV 0 - 255 ---

Z001 RESREV 0 - 255 ---

4.7 ADJUSTMENT PROCEDURE

4.7.1 VIDEO CIRCUIT

Item

WHITE BALANCE

Measuring

instrument

Remote control unit

Test point Adjustment part Description

(HIGHLIGHT)

Signal generator

[1.ADJUST] S001: R DRIVE (Red drive) S002: G DRIVE (Green drive) S003: B DRIVE (Blue drive)

(1) Receive a PAL 75% all white signal. (2) Set PICTURE MODE to "STANDARD". (3) Set ZOOM to "FULL". (4) Set WHITE BALANCE to "MID". (5) Select "1.ADJUST" from the SERVICE MODE. (6) Adjust to Keep one of <S001> (Red drive),

<S002> (Green drive) or <S003> (Blue drive) unchanged, then lower the other two so that the all-white screen is equally white throughout.

NOTE:

Set one or more of <S001>, <S002>, and <S003> to "137".

(7) Check that white balance is properly tracked

from low light to high light. If the white balance tracking is deviated, adjust to correct it.

(8) Press the [MUTING] key to memorize the set

value.

(No.YA564<Rev.001>)1-19

SECTION 5

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 00 00

TMP 0 L 1 0 L 2 0 DDT 0 FAN 0 L C 0

IRS 0

TROUBLESHOOTING

5.1 SELF CHECK FEATURE

5.1.1 OUTLINE

This unit comes with the "Self check" feature, which checks the operational state of the circuit and displays/saves it during failure.Diagnosis is performed when power is turned on, and information input to the main microcomputer is monitored at all time.Diagnosis is displayed in 2 ways via screen display and LED flashes. Failure detection is based on input state of I

C bus and

the various control lines connected to the main microcomputer.

5.1.2 HOW TO ENTER THE SELF CHECK MODE

Before enter the SELF CHECK MODE, press the [MODE] key to confirm that "TV" position is indicated. If it is in a wrong position, the SELF CHECK MODE operation cannot be performed.

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

simultaneously, then enter the SERVICE MODE. (2) Press the [2] key SELF CHECK MODE. (3) Press the [ZOOM] key to enter Page 2 of the SELF CHECK

MODE.

*Use the [CINEMA] key to toggle between Page 1 and Page

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 SYNC (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 I

C bus (Vcc)

when turning on/off the main power. Therefore, turn on the main power, and then wait for about 3 seconds before starting Self check. If recurrences are expected, ensure to clear (reset) the failure history and record the new diagnosis results.

SERVICE MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

SELF CHECK MODE SCREEN (Page 1)

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 00 00

Item Failure history

SELF CHECK MODE SCREEN (Page 2)

1-20 (No.YA564<Rev.001>)

TMP 0 L 1 0 L 2 0 DDT 0 FAN 0 L C 0

IRS 0

Item Failure history

Fig.1

5.1.6 DETAILS

Self check is performed for the following items: (---- is not used Items)

< Page 1 of screen >

Detection item Display Detection content

Low bias line short protection

LOB Confirm the operation of the low bais (5V / 12V /

24V) protection circuit.

,Q9401, Q9601, Q9801 [DC-DC PWB]

IC9401

---- FAN ---- ---- ----

---- AUD ---- ---- ----

Devices on the ANALOG PWB

ANA Confirmation of reply of ACK signal which uses

C communication.

, IC102, IC381, IC551, IC601, IC606,

IC101 IC661, IC3501, TU3001 [ANALOG PWB]

Devices on the DIGITAL PWB

DIG Confirmation of reply of ACK signal which uses

C communication.

[DIGITAL PWB]

IC5001

< Page 2 of screen >

Detection item Display Detection content

---- TMP ---- ---- ----

---- L1 ---- ---- ----

---- L2 ---- ---- ----

---- DDT ---- ---- ----

---- FAN ---- ---- ----

---- LC ---- ---- ----

---- IRS ---- ---- ----

Diagnosis

signal (line)

Detection timing

LB_PRO Detection starts 3 seconds after

the power is turned on. If error continues between 200 ms the power is turned off.

SDA If it checks whenever I

communication is performed and no reply of ACK signal an error will be counted.

SDA If it checks whenever I

communication is performed and no reply of ACK signal an error will be counted.

Diagnosis

signal (line)

Detection timing

5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT

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

Type of error POWER LED flash cycle

Low bias line short protection Blue turnig on and off at 1 second intervals.

< Explanation of operation >

If error is detected, the power is turned off. Shortly after a power is turned off, POWER LED will be blinked. Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.

(No.YA564<Rev.001>)1-21

Victor company of Japan, Limited Display category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan

(No.YA564<Rev.001>)

Printed in Japan

VPT

(No.YA564<Rev.001>)1-23

1-24 (No.YA564<Rev.001>)

SCHEMATIC DIAGRAMS

WIDE LCD TELEVISION

LT-42FX77, LT-42FX77/B, LT-42FX77/BA, LT-42FX77/S

BASIC CHASSIS

CD-ROM No.SML200710

FL4

No.YA564<Rev.001>

2007/10

LT-42FX77, LT-42FX77/B, LT-42FX77/BA, LT-42FX77/S

STANDARD CIRCUIT DIAGRAM

NOTE ON USING CIRCUIT DIAGRAMS

1.SAFETY

The components identified by the symbol and shading are critical for safety. For continued safety replace safety ciritical components only with manufactures recommended parts.

2.SPECIFIED VOLTAGE AND WAVEFORM VALUES

The voltage and waveform values have been measured under the following conditions.

(1)Input signal : Colour bar signal

(2)Setting positions of each knob/button and variable resistor

(3)Internal resistance of tester

(4)Oscilloscope sweeping time

(5)Voltage values

Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.

: Original setting position when shipped

: DC 20kΩ/V

: H

: V

: Othters

: All DC voltage values

20µs / div

5ms / div

Sweeping time is specified

3.INDICATION OF PARTS SYMBOL [EXAMPLE]

In the PW board

: R1209

R209

Type No indication

MM PP

MPP

MF TF BP TAN

(3)Coils

No unit

Others

(4)Power Supply

Respective voltage values are indicated

(5)Test point

: Test point

(6)Connecting method

: Ceramic capacitor : Metalized mylar capacitor

: Polypropylene capacitor : Metalized polypropylene capacitor : Metalized film capacitor : Thin film capacitor : Bipolar electrolytic capacitor : Tantalum capacitor

: [µH]

: As specified

: B1

: 9V

: Connector

: Receptacle

: Only test point display

: Wrapping or soldering

: B2 (12V

: 5V

)

4.INDICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value

No unit : [Ω]

K M

Rated allowable power No indication : 1/16 [W]

Others : As specified

Type

No indication

OMR

MFR

MPR

UNFR

Composition resistor 1/2 [W] is specified as 1/2S or Comp.

(2)Capacitors

Capacitance value

1 or higher : [pF]

less than 1

Withstand voltage

No indication : DC50[V]

Others : DC withstand voltage [V]

AC indicated

Electrolytic Capacitors

47/50[Example]: Capacitance value [µF]/withstand voltage[V]

: [kΩ]

: [MΩ]

: Carbon resistor

: Oxide metal film resistor

: Metal film resistor

: Metal plate resistor

: Uninflammable resistor

: Fusible resistor

: [µF]

: AC withstand voltage [V]

(7)Ground symbol

: LIVE side ground

: ISOLATED(NEUTRAL) side ground

: EARTH ground

: DIGITAL ground

5.NOTE FOR REPAIRING SERVICE

This model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND and the ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be taken for the following points.

(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. if the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out.

(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected, a fuse or any parts will be broken.

Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.

NOTE Due improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list. When ordering parts, please use the numbers that appear in the Parts List.

)

(No.YA564<Rev.001>)2-1

CONTENTS

SEMICONDUCTOR SHAPES ......................................................................2-2

WIRING DIAGRAM ........................................................................................2-3

BLOCK DIAGRAM ........................................................................................ 2-5

CIRCUIT DIAGRAMS .................................................................................... 2-7

ANALOG PWB CIRCUIT DIAGRAM ........................................................................................................... 2-7

DIGITAL PWB CIRCUIT DIAGRAM .......................................................................................................... 2-19

POWER PWB CIRCUIT DIAGRAM .......................................................................................................... 2-53

LED PWB CIRCUIT DIAGRAM ................................................................................................................. 2-59

SW PWB CIRCUIT DIAGRAM ................................................................................................................. 2-61

D-AMP PWB CIRCUIT DIAGRAM ............................................................................................................ 2-63

DC-DC PWB CIRCUIT DIAGRAM ............................................................................................................. 2-65

PATTERN DIAGRAMS .............................................................................. 2-67

ANALOG PWB PATTERN ........................................................................................................................ 2-67

DIGITAL PWB PATTERN ......................................................................................................................... 2-69

POWER PWB PATTERN .......................................................................................................................... 2-73

LED PWB PATTERN ................................................................................................................................ 2-75

SW PWB PATTERN ................................................................................................................................. 2-75

D-AMP PWB PATTERN ............................................................................................................................ 2-76

DC-DC PWB PATTERN ............................................................................................................................ 2-76

VOLTAGE CHARTS .................................................................................. 2-77

WAVEFORMS ............................................................................................ 2-79

USING P.W. BOARD

P.W.B ASS㵭Y name

ANALOG P.W. BOARD

D-AMP P.W. BOARD

SW P.W. BOARD

LED P.W. BOARD

POWER P.W. BOARD

DC-DC P.W. BOARD

DIGITAL P.W. BOARD

LT-42FX77 LT-42FX77/B LT-42FX77/S LT-42FX77/BA

SFL-1235A-H2

SFL-6233A-H2

SFL-7220A-H2

SFL-8727A-H2

SFL-9090A-H2

SFL-9199A-H2

SFL0D381A-H2 SFL0D382A-H2

SFL-1235A-BK

SFL-6233A-BK

SFL-7220A-BK

SFL-8727A-BK

SFL-9090A-BK

SFL-9199A-BK

SFL0D381A-BK

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW FRONT VIEW TOP VIEW

E C B

BOTTOM VIEW FRONT VIEW TOP VIEW

OUT E

ECB

IN OUTE

B (G)E(S)C(D)

1 N

ECB

1 N

CHIP TR

CHIP IC

TOP VIEW

2-2(No.Y A564<Rev.001>)

2-4(No.YA564<Rev.001>)(No.YA564<Rev.001>)2-3

D-AMP PWB

DC-DC PWB

DIGITAL PWB

LED PWB

ANALOG PWB

SW PWB

LCD PANEL UNIT

(MASTER SIDE INVERTER PWB)

SPEAKER(L) SPEAKER(R)

LCD PANEL UNIT

(SLAVE SIDE INVERTER PWB)

LCD PANEL UNIT (CONTROL PWB)

CN001

CN10FCN00S

CN001

CN002

CN100R

CN002

CN000W

CN00A

CN00A CN00P

CN00Q

CN00F

CN0DC

CN100U

CN0LV1

CN0SRCN0SL

CN00H

CN00U

CN00R

CN0DC

CN00H

CN00S

115

49250

13 1

110

1392

9 1

40139

2501

TUNER

F9001 250V/6.3A

POWER PWB

POWER CORD

CN0PW

CN00W

WIRING DIAGRAM

(No.YA564<Rev.001>)2-5 2-6(No.YA564<Rev.001>)

MATRIXVOL

D-A

SOUND SELECT

A-D

OUTPUT SELECT

DSP

A-D

AGC DEMOD.

SIF_OUT

MONO

ANALOG PWB

IC3501

MULTI SOUND PROCESS

MON_L/R

TV_L/ TV_R

TV_MAIN

TU3001

U/V FRONTEND

SPEAKER(R)

SPEAKER(L)

DIGITAL PWB

D-AMP PWB

SW PWB

OSDR1-5 / OSDG1-5 / OSDB1-5

J7001

S7701~S7706

S7707

IC6001

FLASH ROM

IC7201

DDR-SDRAM

IC6101

DRAM

IC7203

HDMI IN

HDMI-1

HDMI

RECEIVE

MAIN MICOM

IC7301

DV1_R0-7

D0-15

A0-21

SD_DQ1-32

A0-21

DV1_G0-7

DV1_B0-7

MI_TX MI_RX MI_CLK

HDMI IN

HDMI-2

DIN-DL

/DR

SUB_VY

AMP_L/R

HP_L/R

AUDIO OUT

POWER

HEADPHONE

IC751

AMP

IC501

AMP

YM_IN/ BYM_IN/ RYM_IN

KEY_1,2

MECA_SW

REMOCON

POWER_LED

IC8752

REMOTE

RECEIVER

LED PWB

D8702

POWER

A-D

YC SEP./

CHROMA DEMOD./

FORMAT

CONVERT/

Enhancer/

IC6001

SUB CPU/

A-D CONVERT / YC SEP./

CHROMA DEMOD./ FORMAT CONVERT/

Enhancer / NR

RGB

PROCESSOR

OSD MIX

SUB CPU

IC101

VIDEO/AUDIO SELECT

IC102

VIDEO SELECT

AMP

V1_VIN

DEC_Y

V2_VIN V3_VIN

V2_YIN

V1_YIN

TV_L/R V1_L/R IN V2_L/R IN V3_L/R IN

DIN_SL/SR

MON_YOUT MON_YOUT

MON_COUT MON_COUT

MON_VOUT

V2_CIN

V1_CIN

MAIN_VY

SUB_VY

MAIN_VY

YMIN

BYMIN

RYMIN

V1_G_Y

V3_G_Y

PC_G

SUB_C

V1_B_Cb

V3_B_Cb

PC_B

MAIN_C

V1_R_Cr

V3_R_Cr

PC_R

MON_VOUT

SUB_C

MAIN_C

MAIN_L/R

Y/C MIX

Y/C

MIX

IC104

IC106

SDRAM

(TEXT DATA)

IC7303

EEP ROM (SETTING

DATA)

IC7602

AUDIO L/R

S-VIDEO

VIDEO-1

VIDEO

AUDIO L/R

S-VIDEO

VIDEO

AUDIO L/R

S-VIDEO

VIDEO-2

VIDEO

MONITOR

OUT

AUDIO L/R

HDMI1

AUDIO INPUT

L/R

Pr/Pb

Cb/Cr

PC IN

(D-SUB)

VIDEO

VIDEO-3

AMP

IC103

AMP

IC105

VOL_L/R

IC601

IC502

VE/SURROUND/AUDIO CONTROL

AGC

IC551

DSP

VOL1 VE

SURROUND

PROCESS

VOL2TONE

IC661

MAXX BASS

LCD

(PANEL)

IC5001

IC5002,IC5003

DQ ADRS

FRAME INTERPOLATE/

LCD CONTROL/

LVDS DRIVE

MEMORY

BLOCK DIAGRAM

2-8(No.YA564<Rev.001>)(No.YA564<Rev.001>)2-7

ANALOG PWB ASS'Y (1/6)

SFL-1235A-H2 [LT-42FX77, LT-42FX77/B, LT-42FX77/S] SFL-1235A-BK [LT-42FX77/BA]

c13613002_0724_2/6_0.0

MSPIN_R

MSPIN_L

SDA3A5

SCL3A5

PC_DET

C3505

U/V FRONTEND

TU3001

C3003

R3014

R3015

R397

R398

MSP_RSTO

DBS_LED2

DBS_LED1

SDA0A5

SCL0A5

R395

R396

R3511

L3507

C3504

R3504

Q3502

C3561 C3564

C3562

L3502

L3501

R3505R3506

R3501

Q3504

C3563

C3007

C3519

C3001

C3014

C3521

L3506

C3015

L3002

C382

C3002

C3010

C3012

R3008

R3009

R3007

C3009

IC381

R3559

R3557

C3008

R3558

R3006

R3001

R3560

R3555

C3553

R3556

R3553

C3522

R3010 R3011

Q3001

C3011

C3554

TV_MAIN

C3501

C3536

C3520

IC3504

C3530

C3544

C3546

L3003

R3554

R3551

R3552

C3551

R3582

R3517

C3518

Q3503

IC3509

IC3508

R3519 R3518

R3016

C3552

IC3506

IC3507

IC3505

R3583

IC3510

R3573

R3574

R3575

R3572

L3509

R3584

R3585

C3574

C3573

R3579

R3578

C383

C3571C3572

L3508

R3563

R3564

C3560

C3559

R3561

R3562

C3555

C3556

IC3104

C3113

TV_L

TV_R

AFT1

MSPOUT_L

MSPOUT_R

DIN_PHOT

R3546

R3547

C3547C3545

K3501

C3533

C3532

C3535

C3534

C3523

C3524

K3502

IC3501

MULTI SOUND PROCESS

X3501

C3502

C3537

C3531

C3529

C3525 C3526

R3516

C3517

C3515

LC3501 L3504

C3516

R3515

R3514

L3503

R3520

R3521

R3523

R3522

R3510

C3528

C3527

R388

R392

C3565

R391

R393

R3512

R3508

C3511

R3502R3503

C381

IC3503

R394

R384

R385

R386

R383

R3577

R3580

R3581

R382

R381

R3576

C3115

C3114

R3119

C3513

C3512

C3503

R3509

C3514

OPEN

100

10K

OPEN

2.2k

OPEN

.01 0

OPEN

0.0022

OPEN

.01

68p

.01

2.2k

100

OPEN

.01

OPEN

100

OPEN

1k 1k

OPEN

11OPEN

OPEN

10k

2200p

OPEN

OPEN OPEN

100

OPEN

680

.01.01

OPEN

.001

10 .01

100

.01

100

OPEN

100

10k

OPEN

10k

.01

OPENOPEN

68p

OPEN

10k

OPEN

.01

OPEN

MSPIN_R

MSPIN_L

SDA3A5

SCL3A5

PC_DET

32V

BS_A5V

DIN_PHOTO

DBS_LED1

GND

DBS_LED2

SCL0A5

GND

SDA0A5

GND

TV_L

TV_R

GND

BS_A5V

GND

BS_A9V

GND

MSP_RSTO

BS_A5V

BS_A9V

GND

BS_A9V

GND

MSPOUT_R

MSPOUT_L

GND

SHEET 2

SHEET 4

SHEET 2,5,6

SHEET 2,3

SHEET 2

SHEET 3

CIRCUIT DIAGRAMS

NALOG PWB CIRCUIT DIAGRAM (1/6) SHEET 1

+ 76 hidden pages

JVC LT-42FX77, LT-42FX77/S, LT-42FX77/B, LT-42FX77/BA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual