JVC LT32X667 Service Manual

SERVICE MANUAL

LCD PANEL TELEVISION

YA42820066

LT-32X667/Z, LT-32X787/Z, LT-32X887

[LT-32X787/Z]

BASIC CHASSIS

FL4

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

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

No.YA428

2006/6

SPECIFICATION

Items Contents

Dimensions ( W × H × D ) 80.0 cm × 58.9 cm × 26.8 cm (31-1/2" × 23-1/4" × 10-5/8") [Included stand]

80.0 cm × 54.5 cm × 13.8 cm (31-1/2" × 21-5/8" × 5-1/2") [Included stand]

Mass 17.4 kg (38.3 lbs) [Included stand]

Power Input AC120 V , 60 Hz Power Consumption 160 W (Max) TV RF System

(Analog / Digital) 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)

TV / CATV Total Channel 191 Channels Intermediate Frequency

(Analog) Color Sub Carrier Frequency (Analog) 3.58 MHz LCD panel 32V-inch wide aspect (16:9)

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

Audio Power Output 10 W + 10 W

Speaker 5.5 cm × 15 cm, Oval type × 2

Antenna Terminal (VHF/UHF, ATSC / DIGITAL CABLE IN) Video / Audio input

[INPUT-1/2/3]

Digital input [DIGITAL-IN 1/2]

PC (RGB) Input D-sub 3-row 15pin × 1

Audio output 250 mV (rms), Low impedance, RCA pin jack × 2

iLink Input/Output

Digital Audio Optical Output Digital SPDIF × 1 Headphone 3.5 mm stereo mini jack × 1 Remote Control Unit RM-C18G (AA/R6 / UM-3 battery × 2)

Design & specifications are subject to change without notice.

Component Video

Analog

VHF Low

VHF High

Video IF

Sound IF

[INPUT-1]

1125i / 750p

525p / 525i

S-Video

[INPUT-1/2]

15.9 kg (35.0 lbs) [TV only]

CCIR (M)

Digital

ATSC terrestrial / Digital cable

02 ch - 06 ch : 54 MHz - 88 MHz 07 ch - 13 ch : 174 MHz - 216 MHz

UHF

14 ch - 69 ch : 470 MHz - 806 MHz

CATV

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 - 135 Sub Mid Band : 01, 96 - 99

45.75 MHz

41.25 MHz (4.5 MHz)

F-type connector, 75Ω unbalanced, coaxial × 1

RCA pin jack × 3 Y : 1 V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75 Ω

Pb/Pr : ±0.35V(p-p), 75 Ω Y : 1 V (p-p), Positive (Negative sync provided), 75 Ω Cb/Cr : 0.7V(p-p), 75 Ω Mini-DIN 4 pin × 2 Y: 1 V (p-p), Positive (Negative sync provided), 75 Ω C: 0.286V (p-p) (Burst signal), 75 Ω

Video

1 V (p-p), Positive (Negative sync provided), 75 Ω, RCA pin jack × 3

Audio

500 mV (rms), High impedance, RCA pin jack × 6

Video

HDMI 2-row 19pin connector × 2

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

Digital: HDMI 2-row 19pin connector × 2

Audio

Anarog: 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2 R/G/B : 0.7V (p-p), 75Ω

HD / VD : 1V (p-p) to 5V (p-p), high impedance < Available signal >

VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz) XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)

TS In/Out (4-pin, S400) × 2, IEEE1394 compliant DTCP digital copy protection compatible

1-2 (No.YA428)

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.YA428)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.

Ventilation hole

*Diagram differs from actual appearance.

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.

< SIDE VIEW >

It fixes in a band.

TV STAND

*Diagram differs from actual appearance.

1.2.4 NOTES ON HANDLING

(1) WHEN TAKING UNIT OUT OF A PACKING CASE

When taking the unit out of a packing case, do not grasp the upper part of the unit. If you take the unit out while grasping the upper part, the LCD PANEL may be damaged because of a pressure. Instead of grasping the upper part, put your hands on the lower backside or sides of the unit.

(2) AS FOR PRESSING OR TOUCHING A SPEAKER

Be careful not to press the opening of the speaker in the lower part of the unit and around them since the decorative sheet on the surface of the openings may be deformed.

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.

200mm

50mm150mm 150mm 50mm

*Diagram differs from actual appearance.

1-4 (No.YA428)

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 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 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 color.

(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.YA428)1-5

2.1 SYSTEM SETTEING

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 0 0

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

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

(1) Set to 0 minutes using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the SERVICE MODE.

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

the self check mode.

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

remote control unit.

SERVICE MENU SCREEN

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 0 0

2.2 FEATURES

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.

Color Management

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

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.

Sensor Effect

With Sensor Effect ON, a "leaf" icon will appear on your TV screen when Smart Sensor brightness adjustment occurs.

2.3 MAIN DIFFERENCE LIST

Item LT-32X667/Z LT-32X787/Z LT-32X887/Z

FRAME COLOR SILVER SILVER BRACK

GRILL COLOR BRACK SILVER BRACK

VIDEO SMART INPUT NO YES ←

1-6 (No.YA428)

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 ) 760 mm × 450 mm × 48 mm

Weight 10.5 kg

Effective screen size Diagonal: 800 mm (H: 697 mm × V: 392 mm)

Aspect ratio 16 : 9

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

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

Pixel pitch (pixel size) Horizontally: 0.1703 mm, Vertically: 0.5108 mm

Displayed color 16777216 colors 256 colors for R G and B

Brightness 500cd/m2

Contrast ratio 800 : 1

Response time ( Tr + Tf ) less than 18 ms

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

Surface polarizer Anti-Glare type Low reflective coat

Color filter Vertical stripe

Backlight Cold cathode fluorescent lamp × 18

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 color 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 color and find out the cell that is flashing on and off.

(No.YA428)1-7

2.4.2 MAIN CPU PIN FUNCTION [IC7601

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

1 VHOLD1 I Data slice for main screen closed caption 51 P4.3 O Not used

2 HFLT1 I/O LPF for main screen closed caption video input 52 P4.2 O Not used

3 P9.4 O Not used 53 P4.1 O Not used

4 P9.3 O Not used 54 P4.0 O Not used

5 DIGR0 O R [0] for OSD 55 P3.7 O Not used

6 TB1in I AC power for timer clock 56 P3.6 O Not used

7 REMO I Remote control 57 P3.5 O Not used

8 BYTE I Data bus width select [L = 16bit (fixed)] 58 P3.4 O Not used

9 CNVss I CPU programming mode select [Normal = L] 59 P3.3 O Not used

10 DIGG0 O G [0] for OSD 60 P3.2 O Not used

11 DIGB0 O B [0] for OSD 61 P3.1 O Not used

12 RESET I Reset for main CPU [Reset = L] 62 HSYNC I H. sync for OSD

13 Xout O System clock osillation (crystal) : 16MHz 63 P3.0 O Not used

14 Vss - GND 64 VSYNC I V. sync for OSD

15 Xin I System clock osillation (crystal) : 16MHz 65 P2.7 O Not used

16 Vcc1 I 3.3V stand-by power supply 66 P2.6 O Not used

17 OSC1 I Clock for OSD 67 P2.5 O Not used

18 OSC2 O Not used : Clock for OSD 68 P2.4 O Not used

19 INT1 I Not used : AV COMPULINK control 69 P2.3 O Not used

20 INT0 I

21 OUT1 O Ys (blanking) for OSD 71 P2.1 O Clock for Inter IC (serial) bus control

22 OUT2 O YM (transparence) for OSD 72 P2.0 I/O Data for Inter IC (serial) bus control

23 P7.7 O Not used 73 P1.7 O Not used

24 P7.6 O Not used 74 P1.6 O Not used

25 P7.5 O Not used 75 P1.5 O Not used

26 P7.4 O Not used 76 P1.4 O Not used

27 CTA2/RTS2 O Not used 77 P1.3 O Not used

28 CLK2 O Not used 78 P1.2 O Not used

29 RxD2 I Digital tuner control 79 P1.1 O Not used

30 TxD2 O Digital tuner control 80 P1.0 O Function LED lighting

31 SDA2 I/O Not used 81 P0.7 O Communication LED lighting

32 DIGR1 O R [1] for OSD 82 P0.6 O Test point

33 DIGG1 O G [1] for OSD 83 CEC_INT O Not used

34 DIGB1 O B [1] for OSD 84 WAKE O Reset for sub(chassis) CPU

35 TxD0 I Data receive (serial) for external programming 85 CARD_DET I Not used

36 RxD0 O Data transmission (serial) for external programming 86

37 CLK0 I Clock for external programming 87 SDA I/O Data for Inter IC (serial) bus control : memory

38 RTS0 O Busy for external programming [Operation = H] 88 SCL O Clock for Inter IC (serial) bus control : memory

39 P5.7 I Not used 89 DIGR2 O R [2] for OSD

40 P5.6 O Not used 90 DIGG2 O G [2] for OSD

41 HOLD I CPU programming mode select [Normal = H] 91 DIGB2 O B [2] for OSD

42 P5.4 O Not used 92 10.0 O Not used

43 P5.3 O Not used 93 KEY2 I

44 P5.2 O Not used 94 KEY1 I

45 P5.1 O Not used 95 VHOLD2 I Data slice for sub screen closed caption

46 WR O CPU programming mode select [Normal = L] 96 HLF2 I/O LPF for sub screen closed caption video input

47 P4.7 O

48 P4.6 I

49 P4.5 I Clock for sub(chassis) CPU communication (serial) 99 VCCE I 5V stand-by power supply

50 P4.4 O Not used 100 CVIN1 I Video(Y) for main screen closed caption

Request for sub(chassis) CPU communication (serial data)

Data transmission for sub(chassis) CPU communication (serial)

Data receive for sub(chassis) CPU communication (serial)

: DIGITAL PWB]

70 P2.2 O Not used

POWER_SW

97 CVIN2 I Video(Y) for sub screen closed caption

98 TVSETB I Test terminal [L Fixed]

I Power switch (mechanical) detection

Key scan data for front control button (MENU/CH+/CH-) KEY2

Key scan data for front control button (INPUT/VOL+/VOL-) KEY1

1-8 (No.YA428)

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

CAUTION AT DISASSEMBLY:

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

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

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

• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers) makes service procedure manageable.

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

3.1.1 REMOVING THE STAND (Fig.1)

(1) Remove the 2 screws [A]. (2) Remove the STAND COVER. (3) Remove the 4 screws [B]. (4) Remove the STAND.

3.1.2 REMOVING THE REAR COVER (Fig.1)

• Remove the STAND. (1) Remove the JACK COVER (L/R). (2) Remove the 7 screws [C], the 5 screws [D], and the 1

screw [E].

(3) Remove the REAR COVER.

3.1.3 REMOVING THE POWER PWB (Fig.1)

• Remove the STAND.

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

3.1.4 REMOVING THE D-AMP PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER. (1) Remove the 2 screw [H]. (2) Remove the D-AMP PWB.

3.1.5 REMOVING THE ANALOG PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the D-AMP PWB. (1) Remove the 2 screws [J] and 2 screws [K]. (2) Remove the TERMINAL BASE. (3) Remove the 1 screw [L]. (4) Remove the TUNER BASE. (5) Remove the 2 screws [M]. (6) Remove the D-AMP BRACKET. (7) Remove the 3 screws [N]. (8) Remove the 2 screws [P]. (9) Remove the ANALOG PWB.

3.1.6 REMOVING THE DC-DC PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER. (1) Remove the 4 screws [Q]. (2) Remove the BACK BRACKET. (3) Remove the 2 screws [R]. (4) Remove the DC-DC PWB.

3.1.7 REMOVING THE COOLING FAN (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET. (1) Remove the 7 hooks of the SHIELD COVER. (2) Remove the SHIELD COVER by sliding it in the direction of

the arrow. (3) Remove the 2 screws [S]. (4) Remove the COOLING FAN.

3.1.8 REMOVING THE ATSC TUNER MODULE PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the SHIELD COVER. (1) Remove the 4 screws [T]. (2) Remove the ATSC TUNER MODULE PWB.

3.1.9 REMOVING THE OPTICAL PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the SHIELD COVER. (1) Remove the 1 screw [U]. (2) Remove the OPTICAL PWB.

3.1.10 REMOVING THE SD CARD PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the SHIELD COVER. (1) Remove the 1 screw [V]. (2) Remove the SD CARD PWB.

3.1.11 REMOVING THE DIGITAL PWB (Fig.1)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the SHIELD COVER.

• Remove the ATSC TUNER MODULE PWB.

• Remove the SD CARD PWB. (1) Remove the 2 screws [W] and 2 screws [X]. (2) Remove the SHIELD TERMINAL. (3) Remove the 7 screws [Y]. (4) Remove the DIGITAL PWB BRACKET. (5) Remove the 2 screws [Z]. (6) Remove the DIGITAL PWB.

CAUTION :

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

(No.YA428)1-9

㧯

JACK COVER

STAND COVER

D-AMP PWB BRACKET

REAR COVER

COOLING FAN

Hook

SD CARD PWB

OPTICAL PWB

DIGITAL PWB BRACKET

D-AMP PWB

ANALOG PWB

TUNER BASE

SHIELD BASE

Hook

SHIELD COVER

DIGITAL PWB

Hook

SHIELD COVER

SHIELD TERMINAL

STAND

BACK BRACKET

POWER CORD HOLDER

POWER CORD

1-10 (No.YA428)

TERMINAL BASE

POWER PWB

DC-DC PWB

FRONT

Fig.1

3.1.12 REMOVING THE SW PWB (Fig.2)

• Remove the STAND.

• Remove the REAR COVER. (1) Remove the 2 screws [A]. (2) Remove the CONTROL ASS’Y with SW PWB. (3) Remove the 2 screws [B]. (4) Remove the SW PWB from the CONTROL ASS’Y.

3.1.13 REMOVING THE LED PWB (Fig.2)

• Remove the STAND.

• Remove the REAR COVER. (1) Remove the 2 screws [C]. (2) Remove the LED PWB.

3.1.14 REMOVING THE SPEAKER (Fig.2)

• Remove the STAND.

• Remove the REAR COVER. (1) Remove the 4 screws [D]. (2) Remove the SPEAKER (L / R).

MAIN BASE

3.1.15 REMOVING THE LCD PANEL UNIT (Fig.2)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the POWER CORD HOLDER. (1) Remove the 3 screws [E] and 2 screws [L]. (2) Remove the STAND BRACKET. (3) Remove the 3 screws [F]. (4) Remove the MAIN BASE. (5) Remove the 4 screws [G] and 4 screw [H]. (6) Remove the LCD PANEL UNIT with TOP/BOTTOM

FRAME. (7) Remove the 2 screws [J]. (8) Remove the TOP FARAME from the LCD PANEL UNIT. (9) Remove the 2 screws [K].

(10) Remove the BOTTOM FARAME from the LCD PANEL UNIT.

SPEAKER

FRONT PANEL

SW PWB

TOP FRAME

LED PWB

STAND BRACKET

LCD PANEL UNIT

SPEAKER

The terminal of a connector is turned up and connects.

Surely insert and lock.

terminal side

Check that connector is inserted completly. (Don't insert aslant)

"LVDS CABLE"

Black

white

LCD PANEL SIDE

white

Black

DIGITAL PWB SIDE

BOTTOM FRAME

CONTROL

ASS'Y

FRONT

Fig.2

(No.YA428)1-11

3.1.16 REMOVING THE CONTROL PWB (Fig.3)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the POWER CORD HOLDER.

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

3.1.18 REMOVING THE INVERTER PWB (SLAVE) (Fig.3)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the POWER CORD HOLDER.

• Remove the LCD PANEL UNIT. (1) Remove the 3 screws [C]. (2) Remove the INVERTER PWB COVER. (3) Remove the INVERTER PWB (SLAVE).

3.1.17 REMOVING THE INVERTER PWB (MASTER) (Fig.3)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the POWER CORD HOLDER.

• Remove the LCD PANEL UNIT. (1) Remove the 3 screws [B]. (2) Remove the INVERTER PWB COVER. (3) Remove the INVERTER PWB (MASTER).

CONTROL PWB

INVERTER PWB

INVERTER PWB (MASTER)

COVER

CONTROL PWB COVER

3.1.19 REMOVING THE BACKLIGHT UNIT (Fig.3)

• Remove the STAND.

• Remove the REAR COVER.

• Remove the BACK BRACKET.

• Remove the POWER CORD HOLDER.

• Remove the LCD PANEL UNIT. (1) Remove the 6 screws [D]. (2) Remove the 6 hooks. (3) Remove the PANEL FRAME. (4) Remove the LCD PANEL from the BACKLIGHT UNIT.

INVERTER PWB

COVER

INVERTER PWB (SLAVE)

LCD PANEL UNIT

HOOK

PANEL FRAME

HOOK

BACK LIGHT UNIT

LCD PANEL

Fig.3

1-12 (No.YA428)

3.2 MEMORY IC REPLACEMENT

S001 R DRIVE 137 NTSC3 FULL STD LOW

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

• This model uses the memory IC.

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

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

3.2.1 MEMORY IC TABLE

Simbol Number of pins Mounting PWB Main content of data

IC7201

IC7602

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

8-pin DIGITAL PWB Setting value of IC7601(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 NTSC3 FULL STD LOW

SETTING ITEM

Setting items Settings Item No.

Video system setting Adjust S001 - S009

Audio system setting Adjust T001 - T003

Main CPU system setting Fixed M001 - M224

Drive system setting Fixed F001 - F002

(Not used) Fixed D001

(Not used) Fixed Z001

Fig.1

(No.YA428)1-13

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 CABLE-02 VOLUME 10 INPUT TV

3.2.4.3 REMOTE CONTROL MENU OPERATION

1. PICTURE ADJUST

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

< NTSC MODE >

Setting item

PICTURE +09 00 -10 00 BRIGHT 00 00 00 00 COLOR 00 00 00 00 TINT 00 00 00 00 DETAIL +06 00 00 00 ENERGY SAVER MODE COLOR TEMPERATURE COLOR MANAGEMENT DYNAMIC GAMMA ON ON ON ON SMART PICTURE OFF ON ON ON DIGITAL VNR AUTO AUTO AUTO AUTO MPEG NR ON ON ON ON SMART SENSOR OFF OFF OFF OFF SENSOR EFFECT OFF OFF OFF OFF

< HD MODE >

Setting item

PICTURE +10 00 -10 00 BRIGHT +01 00 00 00 COLOR +02 00 00 00 TINT 00 00 00 00 DETAIL +07 00 00 00 ENERGY SAVER MODE COLOR TEMPERATURE COLOR MANAGEMENT DYNAMIC GAMMA ON ON ON ON SMART PICTURE OFF ON ON ON DIGITAL VNR AUTO AUTO AUTO AUTO MPEG NR ON ON ON ON SMART SENSOR OFF OFF OFF OFF SENSOR EFFECT OFF OFF OFF OFF

DYNAMIC

HIGH LOW HIGH HIGH

DYNAMIC

HIGH LOW HIGH LOW

STANDARD

+30 +15 00 -10

ON ON ON ON

STANDARD

+30 +15 00 -10

ON ON ON ON

GAME

THEATER

INPUT TV CHANNEL CABLE-02 VOLUME 10 MUTING OFF DISPLAY OFF ASPECT NTSC PANORAMA

SLEEP TIMER OFF THEATER PRO OFF NATURAL CINEMA AUTO VIDEO STATUS DYNAMIC MTS STEREO SOUND EFFECT

2. SOUND ADJUST

BASS 00 TREBLE 00 BALANCE 00 TURN ON VOLUME Current VOLUME LIMIT 50

3. CLOCK / TIMERS

ON / OFF TIMER OFF

4. INITIAL SETUP

DIGITAL-IN DIGITAL-IN1 AUDIO NOISE MUTING ON FRONT PANEL LOCK OFF V1 SMART INPUT OFF VIDEO INPUT LABEL All blank POSITION ADJUSTMENT Center POWER INDICATOR HIGH LANGUAGE ENG. CLOSED CAPTION OFF AUTO SHUT OFF OFF XDS ID ON V-CHIP OFF

Setting item Setting position

HD / ATSC FULL

A.H.S.+ OFF A.T.C ON SMART SOUND OFF HYPER BASS OFF

Setting item Setting position

AUTO AUTO

1-14 (No.YA428)

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.

(4) Then solder leads B and C.

(No.YA428)1-15

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

warning 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

VIDEO STATUS STANDARD

BRIGHT / CONTRAST / COLOR / TINT

COLOR TEMPERATURE LOW

DIG. NOISE CLEAR OFF

COLOR MANAGEMENT ON

NATURAL CINEMA OFF

TREBLE / BASS / BALANCE 00

SMART SOUND OFF

MTS STEREO

A.H.S.+ OFF

HYPER BASS OFF

ASPECT FULL

4.3 MEASURING INSTRUMENT AND FIXTURES

• Signal generator (Pattern generator) [NTSC]

• TV audio multiplex signal generator

• Remote control unit

4.4 ADJUSTMENT ITEMS

 VIDEO CIRCUIT

• WHITE BALANCE (HIGHLIGHT) adjustment

 MTS CIRCUIT

• MTS INPUT LEVEL adjustment

• MTS SEPARATION adjustment

4.5 BASIC OPERATION OF SERVICE MODE

4.5.1 HOW TO ENTER THE SERVICE MODE

(1) Set to 0 minutes using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the SERVICE MODE (Fig.1)

SERVICE MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

Fig.1

NOTE:

• Before entering the SERVICE MODE, confirm that the

setting of TV/CATV switch of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR/DVD switch is at the "VCR" side. If the switches have not been properly set, you cannot enter the SERVICE MODE.

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

SERVICE MENU 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 MENU SCREEN.

4.5.2 HOW TO EXIT THE SERVICE MODE

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

4.5.3 SERVICE MODE SELECT KEY LOCATION

VCR/DVD switch

TV/CATV switch

SLEEP TIMER

MUTING

VOLUME -

SPLIT

FREEZE

INPUT

D/A

ML/MTS

SLEEP

FAVORITE

C.C.

MUTING

VCR CHANNEL

PREV NEXT

OPEN CLOSE

CATV VCR DVD

ASPECT

MULTI SCREEN

INDEX

SELECT

SWAP

DISPLAY

TUNE

THEATER

VIDEO

PRO

STATUS

NATURAL CINEMA

SOUND

VOL VOL

VCR DVD

POWER

REW

PLAY

REC

STOP

RM-C18G

POWER

RETURN+/TV

CHANNEL

LIGHT

GUIDE

TV VCR

PAUSE

STILL PAUSE

SUB

BACK

POWER

DISPLAY

NUMBER

VIDEO STATUS

CHANNEL +

VOLUME +

BACK

CHANNEL -

1-16 (No.YA428)

4.5.4 ADJUSTMENT MODE

S001 R DRIVE 137 NTSC3 FULL STD LOW

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.

4.5.4.2

DESCRIPTION OF STATUS DISPLAY OF ADJUSTMENT MODE

ADJUSTMENT MODE

SETTING ITEM No.

S001 R DRIVE 137 NTSC3 FULL STD LOW

SIGNAL SYSTEM

SCREEN MODE

SETTING ITEM

Fig.2

(1) SIGNAL SYSTEM

The signal displayed on the screen is displayed.

NTSC3 : 525i (Composite / S-video input) 525I : 525i (Component input) 525P : 525p 1125I6 : 1125i 750P : 750p PCVGA : PC (VGA) PCXGA : PC (XGA) H525I : HDMI 525i H525P : HDMI 525p H125I6 : HDMI 1125i H750P : HDMI 750p D525I : ATSC 525i D525P : ATSC 525p D125I6 : ATSC 1125i

(2) SCREEN MODE

State of the SCREEN SIZE or MULTI PICTURE is displayed.

SINGLE SCREEN

FULL : FULL 1609 : CINEMA, CINEMA ZOOM PANO : PANORAMA, HD PANORAMA REGU : REGULAR, SLIM

MULTI SCREEN

M2 : SPLIT, FREEZE screen M12 : INDEX screen

SETTING VALUE (DATA)

VIDEO STATUS

WHITE BALANCE

(3) VIDEO STATUS

STD : STANDARD DYN : DYNAMIC TH : THEATER GAME : GAME

(4) WHITE BALANCE

HIGH : HIGH LOW : LOW

(5) SETTING ITEM NAME

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

Item No. Setting item

S001 - S009 Video system setting

T001 - T003 Audio system setting

M001 - M224 Main CPU system setting

F001 - F002 Drive system setting

D001 (NOT USED)

Z001 (NOT USED)

(6) SETTING ITEM NO.

Setting item numbers are displayed. For the setting item names to be displayed, refer to "Initial setting value of adjustment mode".

(7) SETTING VALUE (DATA)

The SETTING VALUE is displayed.

4.5.4.3 CHANGE AND MEMORY OF SETTING VALUE

SELECTION OF SETTING ITEM

• [CH+] / [CH-] key. Change the setting items up/ down.

S001... ↔ T001... ↔ M001... ↔ F001... ↔ D001... ↔ Z001...

• [SLEEP TIMER] key. Switches to the next items.

S001 → T001 → M001... → F001... → D001 → Z001

CHANGE OF SETTING VALUE (DATA)

• [VOL+] / [VOL-] key. Change the setting values up/down.

MEMORY OF SETTING VALUE (DATA)

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

(No.YA428)1-17

4.6 INITIAL SETTING VALUES IN THE SERVICE MODE

• Perform fine-tuning based on the "initial values" using the remote control when in the Service mode.

• The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They are fixed values.

4.6.1 VIDEO SYSTEM SETTING

Item No. Item Variable range Setting value

S001 R DRIVE 000 - 255 137

S002 G DRIVE 000 - 255 121

S003 B DRIVE 000 - 255 108

S004 RESREV 000 - 255 000

S005 RESREV 000 - 255 000

S006 RESREV 000 - 255 002

S007 RESREV 000 - 255 002

S008 RESREV 000 - 255 002

S009 RESREV 000 - 255 002

4.6.2 AUDIO SYSTEM SETTING

Item No. Item Variable range Setting value

T001 INPLEVEL 000 - 015 006

T002 LOWSEPA 000 - 063 034

T003 HIGHSEPA 000 - 063 013

4.6.3 MAIN CPU SYSTEM SETTING (Fixed values)

Item No. Item Variable range Setting value

M001 1E00 00 - FF 00

M002 1E01 00 - FF 00

M003 1E02 00 - FF 05

M004 1E03 00 - FF 20

M005 1E04 00 - FF 10

M006 1E05 00 - FF 00

M007 1E06 00 - FF 00

M008 1E07 00 - FF 01

M009 1E08 00 - FF 00

M010 1E09 00 - FF 00

M011 1E0A 00 - FF 01

M012 1E0B 00 - FF 00

M013 1E0C 00 - FF 01

M014 1E0D 00 - FF 00

M015 1E0E 00 - FF 00

M016 1E0F 00 - FF 00

M017 1E10 00 - FF 01

M018 1E11 00 - FF 00

M019 1E12 00 - FF 00

M020 1E13 00 - FF 01

M021 1E14 00 - FF 00

M022 1E15 00 - FF 00

M023 1E16 00 - FF 00

M024 1E17 00 - FF 00

Item No. Item Variable range Setting value

M025 1E18 00 - FF 00

M026 1E19 00 - FF 00

M027 1E1A 00 - FF 00

M028 1E1B 00 - FF 00

M029 1E1C 00 - FF 00

M030 1E1D 00 - FF 00

M031 1E1E 00 - FF 00

M032 1E1F 00 - FF 00

M033 1E20 00 - FF 00

M034 1E21 00 - FF 00

M035 1E22 00 - FF 00

M036 1E23 00 - FF 00

M037 1E24 00 - FF 00

M038 1E25 00 - FF 00

M039 1E26 00 - FF 00

M040 1E27 00 - FF 00

M041 1E28 00 - FF 00

M042 1E29 00 - FF 00

M043 1E2A 00 - FF 00

M044 1E2B 00 - FF 00

M045 1E2C 00 - FF 00

M046 1E2D 00 - FF 00

M047 1E2E 00 - FF 00

M048 1E2F 00 - FF 00

M049 1E30 00 - FF 00

M050 1E31 00 - FF 00

M051 1E32 00 - FF 00

M052 1E33 00 - FF 00

M053 1E34 00 - FF 00

M054 1E35 00 - FF 00

M055 1E36 00 - FF 02

M056 1E37 00 - FF 00

M057 1E38 00 - FF 01

M058 1E39 00 - FF 02

M059 1E3A 00 - FF 10

M060 1E3B 00 - FF 83

M061 1E3C 00 - FF 00

M062 1E3D 00 - FF 00

M063 1E3E 00 - FF 00

M064 1E3F 00 - FF 00

M065 1E40 00 - FF 00

M066 1E41 00 - FF 00

1-18 (No.YA428)

Item No. Item Variable range Setting value

M067 1E42 00 - FF 00

M068 1E43 00 - FF 03

M069 1E44 00 - FF 03

M070 1E45 00 - FF 03

M071 1E46 00 - FF 3F

M072 1E47 00 - FF 01

M073 1E48 00 - FF 00

M074 1E49 00 - FF 00

M075 1E4A 00 - FF 00

M076 1E4B 00 - FF 00

M077 1E4C 00 - FF 00

M078 1E4D 00 - FF 00

M079 1E4E 00 - FF 00

M080 1E4F 00 - FF 00

M081 1E50 00 - FF 00

M082 1E51 00 - FF 00

M083 1E52 00 - FF 00

M084 1E53 00 - FF 00

M085 1E54 00 - FF 00

M086 1E55 00 - FF 00

M087 1E56 00 - FF 00

M088 1E57 00 - FF 00

M089 1E58 00 - FF 00

M090 1E59 00 - FF 00

M091 1E5A 00 - FF 00

M092 1E5B 00 - FF 00

M093 1E5C 00 - FF 00

M094 1E5D 00 - FF 00

M095 1E5E 00 - FF 00

M096 1E5F 00 - FF 00

M097 1E60 00 - FF 00

M098 1E61 00 - FF 00

M099 1E62 00 - FF 00

M100 1E63 00 - FF 00

M101 1E64 00 - FF 00

M102 1E65 00 - FF 00

M103 1E66 00 - FF 00

M104 1E67 00 - FF 00

M105 1E68 00 - FF 04

M106 1E69 00 - FF 03

M107 1E6A 00 - FF 02

M108 1E6B 00 - FF 00

M109 1E6C 00 - FF 00

M110 1E6D 00 - FF 00

M111 1E6E 00 - FF 00

M112 1E6F 00 - FF 00

Item No. Item Variable range Setting value

M113 1E70 00 - FF 00

M114 1E71 00 - FF 00

M115 1E72 00 - FF 00

M116 1E73 00 - FF 00

M117 1E74 00 - FF 00

M118 1E75 00 - FF 00

M119 1E76 00 - FF 00

M120 1E77 00 - FF 0F

M121 1E78 00 - FF 13

M122 1E79 00 - FF 00

M123 1E7A 00 - FF 00

M124 1E7B 00 - FF 00

M125 1E7C 00 - FF 00

M126 1E7D 00 - FF 00

M127 1E7E 00 - FF 01

M128 1E7F 00 - FF 00

M129 1E80 00 - FF 01

M130 1E81 00 - FF 00

M131 1E82 00 - FF 01

M132 1E83 00 - FF 00

M133 1E84 00 - FF 00

M134 1E85 00 - FF 00

M135 1E86 00 - FF 00

M136 1E87 00 - FF 00

M137 1E88 00 - FF 00

M138 1E89 00 - FF 00

M139 1E8A 00 - FF 00

M140 1E8B 00 - FF 00

M141 1E8C 00 - FF 00

M142 1E8D 00 - FF 00

M143 1E8E 00 - FF 00

M144 1E8F 00 - FF 00

M145 1E90 00 - FF 00

M146 1E91 00 - FF 00

M147 1E92 00 - FF 00

M148 1E93 00 - FF 00

M149 1E94 00 - FF 00

M150 1E95 00 - FF 00

M151 1E96 00 - FF 00

M152 1E97 00 - FF 00

M153 1E98 00 - FF 00

M154 1E99 00 - FF 00

M155 1E9A 00 - FF 01

M156 1E9B 00 - FF 00

M157 1E9C 00 - FF 03

M158 1E9D 00 - FF 00

(No.YA428)1-19

Item No. Item Variable range Setting value

M159 1E9E 00 - FF 00

M160 1E9F 00 - FF 00

M161 1EA0 00 - FF 00

M162 1EA1 00 - FF 00

M163 1EA2 00 - FF 00

M164 1EA3 00 - FF 01

M165 1EA4 00 - FF 00

M166 1EA5 00 - FF 00

M167 1EA6 00 - FF 00

M168 1EA7 00 - FF 00

M169 1EA8 00 - FF 00

M170 1EA9 00 - FF 00

M171 1EAA 00 - FF 00

M172 1EAB 00 - FF 00

M173 1EAC 00 - FF 0A

M174 1EAD 00 - FF 00

M175 1EAE 00 - FF 00

M176 1EAF 00 - FF 00

M177 1EB0 00 - FF 00

M178 1EB1 00 - FF 00

M179 1EB2 00 - FF 01

M180 1EB3 00 - FF 00

M181 1EB4 00 - FF 00

M182 1EB5 00 - FF 00

M183 1EB6 00 - FF 00

M184 1EB7 00 - FF 00

M185 1EB8 00 - FF 00

M186 1EB9 00 - FF 00

M187 1EBA 00 - FF 00

M188 1EBB 00 - FF 00

M189 1EBC 00 - FF 00

M190 1EBD 00 - FF 00

M191 1EBE 00 - FF 00

M192 1EBF 00 - FF 00

M193 1EC0 00 - FF 00

M194 1EC1 00 - FF 00

M195 1EC2 00 - FF 01

M196 1EC3 00 - FF 00

M197 1EC4 00 - FF 00

M198 1EC5 00 - FF 00

M199 1EC6 00 - FF 00

M200 1EC7 00 - FF 00

M201 1EC8 00 - FF 01

M202 1EC9 00 - FF 00

M203 1ECA 00 - FF 00

M204 1ECB 00 - FF 00

Item No. Item Variable range Setting value

M205 1ECC 00 - FF 02

M206 1ECD 00 - FF 00

M207 1ECE 00 - FF 00

M208 1ECF 00 - FF 00

M209 1ED0 00 - FF 00

M210 1ED1 00 - FF 00

M211 1ED2 00 - FF 00

M212 1ED3 00 - FF 00

M213 1ED4 00 - FF 00

M214 1ED5 00 - FF 00

M215 1ED6 00 - FF 00

M216 1ED7 00 - FF 00

M217 1ED8 00 - FF 00

M218 1ED9 00 - FF 00

M219 1EDA 00 - FF 00

M220 1EDB 00 - FF 00

M221 1EDC 00 - FF 00

M222 1EDD 00 - FF 00

M223 1EDE 00 - FF 00

M224 1EDF 00 - FF 00

4.6.4 DRIVE SYSTEM SETTING (Fixed values)

Item No. Item Variable range Setting value

F001 DD 000 - 001 000

F002 RAM REF 000 - 001 000

4.6.5 NOT USED (Fixed values)

Item No. Item Variable range Setting value

D001 RESREV 000 - 255 002

4.6.6 NOT USED (Fixed values)

Item No. Item Variable range Setting value

Z001 RESREV 000 - 255 002

1-20 (No.YA428)

4.7 ADJUSTMENT PROCEDURE

4.7.1 VIDEO CIRCUIT

Item

WHITE BALANCE

Measuring

instrument

Remote control unit

(HIGHLIGHT)

Signal generator

Test point Adjustment part Description

[1.ADJUST] S030: R DRIVE (Red drive) S031: G DRIVE (Green drive) S032: B DRIVE (Blue drive)

(1) Receive a NTSC 75% all white signal. (2) Set "VIDEO STATUS" to "STANDARD". (3) Set "ASPECT" to "FULL". (4) Select "COLOR TEMPERATURE" to "LOW". (5) Select "1.ADJUST" from the SERVICE

MODE.

(6) Adjust to keep one of < S030 > (Red drive),

< S031 > (Green drive) or < S032 > (Blue drive) unchanged, then lower the other two so that the all-white screen is equally white throughout.

NOTE:

Set one or more of < S030 >, < S031 >, and < S032 > 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 memoirze the set

value.

4.7.2 MTS CIRCUIT

Item

MTS INPUT LEVEL

MTS SEPARATION

L-Channel signal waveform

1 cycle

Measuring

instrument

Remote control unit

TV audio multiplex signal generator

Oscilloscope

Remote control unit

Test point Adjustment part Description

[1.ADJUST] T001: IN LEVEL

(1) Receive the any broadcast. (2) Select "1.ADJUST" from the SERVICE

MODE.

(3) Verify that the < T001 > (IN LEVEL) is set at its

initial setting value.

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

value.

L OUT R OUT

[1.ADJUST] T002: LOW SEP T003: HI SEP

(1) Input the stereo L signal (300Hz) from the TV

audio multiplex signal generator to the antenna terminal.

(2) Connect an oscilloscope to L OUT pin of the

AUDIO OUT, and display one cycle portion of the 300Hz signal.

(3) Change the connection of the oscilloscope to

R OUT pin of the AUDIO OUT, and enlarge the voltage axis.

(4) Select "1.ADJUST" from the SERVICE

MODE.

R-Channel crosstalk portion

Minimum

(5) Set the initial setting value of the < T002 >

(LOW SEP).

(6) Adjust the < T002 > so that the stroke element

of the 300Hz signal will become minimum.

(7) Change the signal to 3kHz, and similarly ad-

just the < T003> (HI SEP).

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

value.

(No.YA428)1-21

SECTION 5

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

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

IRS 0

LOB 0 FAN 0 AUD 0

ANA 9 DIG 9

0000 0 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 entering the Self check Display mode, confirm that the setting of TV/CATV SW of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR/DVD SW is at the "VCR" side. If the switches have not been properly set, you cannot enter the Self check Display mode.

(1) Set to "0 minutes" using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the service mode.

(3) Press the [2] key (SELF CHECK) before the service mode

screen disappears.

(4) Press the [SLEEP TIMER] key to enter Page 2 of the SELF

CHECK MODE.

• When the [RETURN+] key pressed, the first page change screen.

NOTE:

When a number key other than the [2] key is pressed in the SERVICE MENU SCREEN, the other relevant screen may be displayed. This is not used in the SELF CHECK. Press the [MENU] key to return to the SERVICE 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.

5.1.5 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 displayed and counted as "NG".

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

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 0 0

Item Failure history

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.

1-22 (No.YA428)

SELF CHECK MODE SCREEN (Page 2)

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

IRS 0

Item

Fig.1

Failure history

5.1.6 DETAILS

Self check is performed for the following items:

< Page 1 of screen >

Detection item Display Detection content

Low bias line short protection

Fan lock FAN Not used ---- ----

Audio AUD Not used ---- ----

Devices on the ANALOG PWB

Devices on the DIGITAL PWB

< Page 2 of screen >

Detection item Display Detection content

Temp. sensor TEM Not used ---- ----

Lamp does not light up L1 Not used ---- ----

Lamp goes out L2 Not used ---- ----

Abnormal DD CPU circuit

Fan lock FAN Not used ---- ----

Lamp cover open LC Not used ---- ----

Abnormal of optical iris IRS Not used ---- ----

LOB Confirm the operation of the low bais (16V / 5V /

LCD5V / 3.3V / 1.2V) protection circuit.

, Q9651[POWER PWB]

Q9601

ANA Confirmation of reply of ACK signal which uses

I2C communication.

, IC102, IC381, IC601, IC606, TU3001

IC101

[ANALOG PWB]

DIG Confirmation of reply of ACK signal which uses

I2C communication. [DIGITAL PWB]

DDT Not used ---- ----

Diagnosis

signal (line)

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 I2C

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

SDA If it checks whenever I2C

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 LED turnig on and off at 1 second intervals.

ATSC TUNER fan lock detection Blue LED turnig on and off at 2 second intervals.

CableCard error detection Blue LED turnig on and off at 2 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.YA428)1-23

Victor Company of Japan, Limited Flat Panel Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan

(No.YA428)

Printed in Japan

VPT

LCD Flat Television Users Guide

For Models:

LT-32X667 LT-32X787 LT-32X887 LT-37X787 LT-37X887

LT-37XM57

LT-40X667 LT-40X787 LT-40X887

Illustration of LT-32X787 and RM-C18G

Important Note:

In the spaces below, enter the model and serial number of your television (located at the rear of the television cabinet). Staple your sales receipt or invoice to the inside cover of this guide. Keep this user’s guide in a convenient place for future reference. Keep the carton and original packaging for future use.

Model Number:

Serial Number:

LCT2104-001B-A

0406TNH-II-IM

Important Safety Precautions

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: To reduce the risk of electric shock. Do not

remove cover (or back). No user serviceable parts inside. Refer servicing to qualified service personnel.

The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING: TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE THIS

APPARATUS TO RAIN OR MOISTURE.

CAUTION: TO INSURE PERSONAL SAFETY, OBSERVE THE FOLLOWING RULES

REGARDING THE USE OF THIS UNIT.

1. Operate only from the power source specified on the unit.

2. Avoid damaging the AC plug and power cord.

3. Avoid Improper installation and never position the unit where good ventilation is unattainable.

4. Do not allow objects or liquid into the cabinet openings.

5. In the event of trouble, unplug the unit and call a service technician. Do not attempt to repair it yourself or remove the rear cover.

Changes or modifications not approved by JVC could void the warranty.

* When you don’t use this TV set for a long period of time, be sure to disconnect both the

power plug from the AC outlet and antenna for your safety.

* To prevent electric shock do not use this polarized plug with an extension cord, receptacle or

other outlet unless the blades can be fully inserted to prevent blade exposure.

IMPORTANT RECYCLING INFORMATION

This product has a fluorescent lamp that contains a small amount of mercury. It also

contains lead in some components. Disposal of the materials may be regulated in your

community due to environmental considerations. For disposal or recycling information,

please contact your local authorities, or the Electronic Industries Alliance:

http://www.eiae.org

• As an “ENERGY STAR®” partner, JVC has determined that this product or product model meets the “ENERGY STAR efficiency.

” guidelines for energy

IMPORTANT SAFETY INSTRUCTIONS

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with dry cloth.

7) Do not block any ventilation openings. Install in accordance with the manufacturer's

instructions.

8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10) Protect the power cord from being walked on or pinched particularly at plugs, convenience

receptacles, and the point where they exit from the apparatus.

11) Only use attachments/accessories specified by the manufacturer.

12) Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold

with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13) Unplug this apparatus during lightning storms or when unused for long periods of time.

14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has

been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15) Apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus.

16) Avoid improper installation and never position the unit where good ventilation is impossible. When installing this TV, distance recommendations must be maintained between the set and the wall, as well as inside a tightly enclosed area or piece of furniture. Keep to the minimum distance guidelines shown for safe operation.

150 mm

17) Cautions for installation

— Do not tilt the TV towards the left or right, or towards the back.

— Install the TV in a corner on the floor so as to keep cords out of the way. — The TV will generate a slight amount of heat during operation. Ensure that sufficient space is

available around the TV to allow satisfactory cooling.

18) Make enough room for inserting and removing the power plug. Place the TV as close to the

outlet as possible. The main power supply for this TV is controlled by inserting or removing the power plug.

200 mm

150 mm

200 mm

50 mm

FCC Notice:

Note: This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

– Reorient or relocate the receiving antenna. – Increase the separation between the equipment and receiver. – Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

– Consult the dealer or an experienced radio/TV technician for help.

Warnings

We have an important note for customers who subscribe to basic cable services (do not have a separate cable box) and plan to use their JVC TV remote control to select channels.

Once you run the Auto Tuner Setup (which detects and programs all the channels your TV is receiving through the RF input), every channel number available from your cable company will appear in your television’s Channel Summary and they will all be marked as available for scanning. Even though every channel is detected and appears as available, you will only be able to view those that you speciﬁ cally subscribe to from your cable company. This will likely mean there are blank channels between those channels you wish to scan or “surf”.

We apologize for any inconvenience this may cause but it is important to note that this is not a malfunction of your television. If you want to sequentially scan those channels you subscribe to without blank ones in between, you can contact your cable company for their cable box and remote.

Avoiding Ghost Images

Displaying ﬁ xed images for extended periods of time can leave a subtle but temporary ghost image on your screen. To avoid this, mix your viewing pattern.

Examples include, but are not limited to the following:

• Stock-market report bars

• Shopping channel logos and pricing

displays

• Video game patterns or scoreboards

• Bright station logos

• Internet web sites or other computer-style

images.

• DVD discs, video tapes, laser discs

• Broadcast, cable, satellite channels or

digital television tuners/converters.

TV on

For example...

TV off

XYZ XYZ

Warnings (Continued...)

Caring for the Cabinet

Normally, light dusting with a soft, non-scratching duster will keep your TV clean.

If you wish to wipe down the television, first unplug it. Then wipe gently with a soft cloth, slightly moistened with water. You can add a few drops of mild liquid detergent to the water to help remove spots of oily dirt.

• DO NOT allow liquid to enter the TV through the ventilation slots.

• DO NOT use strong or abrasive cleaners on the TV.

• DO NOT spray liquids or cleaners directly on the TV’s surface.

• DO NOT rub or scrub the TV harshly. Wipe the set gently with a soft cloth.

Caring for the Screen

The screen is treated with an electrostatic-proof coating. When it gets dirty, wipe it gently with a soft cloth. If the screen is very dirty, wipe it down with a cloth dipped in a diluted kitchen cleaner and thoroughly wrung-out. Then wipe immediately after with a clean, dry cloth.

Do not apply alcohol, organic solvents (like acetone), acidic or alkaline cleansers to the screen. These will remove the coating layer and cause discolorations.

Do not push or hit the screen. This could cause scratches on the screen surface and image distortions.

+ 184 hidden pages

JVC LT32X667 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual