Lg 29fu1rl/rg User manual

COLOR TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : CW91A

MODEL : 29FU1RL/RG

MODEL : 29FU1RL/RG-TK

May., 2010

Printed in China

P/NO : MFL62077307

North/ Latin America http://aic.lgservice.com

Europe/Africa http://eic.lgservice.com

Asia/Oceania http://biz.lgservice.com

Internal Use Only

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- 2 -

CONTENTS

Contents...................................................................................................................2

Safety Precautions..............................................................................................3

Specifications........................................................................................................4

Adjustment Instructions .................................................................................5

Trouble Shooting.................................................................................................10

Printed circuit board.........................................................................................14

Block Diagram ......................................................................................................16

Exploded View.....................................................................................................18

SVC. Sheet..................................................................................................................

Only for training and service purposes.

LGE Internal Use Only

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- 3 -

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in

the Schematic Diagram and Replacement Parts List.

It is essential that these special safety parts should be replaced with the same components as recommended in this manual to

prevent X-RADIATION, Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during

the servicing of a receiver whose chassis is not isolated from

the AC power line. Use a transformer of adequate power rating

as this protects the technician from accidents resulting in

personal injury from electrical shocks.

It will also protect the receiver and it's components from being

damaged by accidental shorts of the circuitry that may be

inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown,

replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film

Resistor, over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to high vacuum and large surface area of picture tube,

extreme care should be used in handling the Picture Tube.

Do not lift the Picture tube by it's Neck.

X-RAY Radiation

Warning:

To determine the presence of high voltage, use an accurate

high impedance HV meter.

Adjust brightness, color, contrast controls to minimum.

Measure the high voltage.

The meter reading should indicate

23.5 ± 1.5KV: 14-19 inch, 26 ± 1.5KV: 19-21 inch,

29.0 ± 1.5KV: 25-29 inch, 30.0 ± 1.5KV: 32 inch

If the meter indication is out of tolerance, immediate service

and correction is required to prevent the possibility of

premature component failure.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed

metallic parts of the cabinet, such as antennas, terminals, etc.,

to be sure the set is safe to operate without damage of

electrical shock.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source,

connect an electrical jumper across the two AC plug prongs.

Place the AC switch in the on position, connect one lead of

ohm-meter to the AC plug prongs tied together and touch other

ohm-meter lead in turn to each exposed metallic parts such as

antenna terminals, phone jacks, etc.

If the exposed metallic part has a return path to the chassis, the

measured resistance should be between 1MΩ and 5.2MΩ.

When the exposed metal has no return path to the chassis the

reading must be infinite.

An other abnormality exists that must be corrected before the

receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor

between a known good earth ground (Water Pipe, Conduit, etc.)

and the exposed metallic parts.

Measure the AC voltage across the resistor using AC

voltmeter with 1000 ohms/volt or more sensitivity.

Reverse plug the AC cord into the AC outlet and repeat AC

voltage measurements for each exposed metallic part. Any

voltage measured must not exceed 0.75 volt RMS which is

corresponds to 0.5mA.

In case any measurement is out of the limits specified, there is

possibility of shock hazard and the set must be checked and

repaired before it is returned to the customer.

Leakage Current Hot Check circuit

The source of X-RAY RADIATION in this TV receiver is the

High Voltage Section and the Picture Tube.

For continued X-RAY RADIATION protection, the

replacement tube must be the same type tube as specified in

the Replacement Parts List.

1.5 Kohm/10W

To Instrument’s

exposed

METALLIC PARTS

Good Earth Ground

such as WATER PIPE,

CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

Only for training and service purposes.

LGE Internal Use Only

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- 4 -

VScope

This specification applies to CTV models based on chassis

CW91A .

VSPECIFIC

Testing should be done at given condition if no condition is specified

1) Ambient Temperature : 25±5°C (CST 40±5°C)

2) Ambient Humidity : 65±10%

3) Input Voltage : Standard input voltage (110~240V ac 50/60Hz)

4) All BOM mentioned component should be same quality standard

as mentioned in specs./ drawing of that particular Part No.

5) Testing should be done after 20 minute heat run.

6) Power Voltage

VTesting and Inspection Method

1) Performance Testing --- According to LG TV Testing Standard

2) Required Regulations

No

1

2

3

4

5

6

7

8

9

10

Item

Receiving System

Available Channel

Input Voltage

Market

Screen Size

Aspect Ratio

Display Method

Tuning System

Operating Environment

Storage Environment

Remark

China / Indonesia/ Thai/ Vietnam

CIS

L.America/ Philippine/Taiwan

Asia/Middle East/Africa

PAL Model

NTSC Model

Asia

Others

PAL Model

NTSC

Specification

PAL BG.DK.I / NTSC M(AV3.58/4.43)

SECAM DK

PAL NM / NTSC M(AV3.58)

PAL BG,DK,I / NTSC M(AV3.58/4.43)

SECAM BG,DK,L

VHF : E2 ~ E12

UHF : E21 ~ E69

CATV : S1 ~ S20

HYPER : S21 ~ S41

VHF : 2~13CH(12CH)

UHF : 14~69CH(56CH)

CATV : 1 ~ 125CH(113CH)

AC 220Vac 50/60Hz

AC 110~240V 50/60Hz

Latin America, China, Indonesia

Philippines, Taiwan, Thai, Vietnam,

Asia/Africa,CIS

29 inch Flat / Super slim

4:3

CRT

FVS

FS

1)Temp : 0 ~ 40 deg

2)Humidity : ~ 85 %

3)Temp : -20 ~ 60 deg

4)Humidity : ~ 90 %

VGeneral Specification

Market Place

Middle East/Africa

Band

LG

Standard input Voltage

AC110 ~240V 50/60Hz

Remarks

SPECIFICATIONS

Note : Specification and others are subject to change without notice for improvement.

Only for training and service purposes.

LGE Internal Use Only

Market Place

Middle East/Africa/cis

Compliance

Safety : CB(IEC60065)

EMC : CE(EN55020,EN55013)

Remarks

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1. Scope of Application

These adjustment instructions are applicable to CW91A

Chassis whether SET(0), SKD(0), or CKD(0).

2. Notes

2.1 Because this is a cold chassis, it is not necessary to use

an isolation transformer. However,operating it using a

transformer between the power supply line and chassis

input to prevent electric shock and to protect the test

instrument.

2.2 All adjustments must be done in correct sequence.

However, for better productivity, it can be changed in a pre-

permitted range.

2.3 Environment conditions: If not specified, it must be done in

following conditions.

1) Temperature: 25°C ±5°C

2) Humidity : 65%±10%

2.4 Power supply of SET

1) NTSC

Latin America/Philippines Market:100~240V ±10%,50/60Hz

Korea Market : 220V ±10%,60Hz

Taiwan Market : 110V ±10%,60Hz

Japan Market : 100V ±10%,50/60Hz

2) PAL/SECAM

China/Indonesia/Thailand/Vietnam/CIS Market :

100~240V ±10%, 50/60Hz

2.5 If not specified, the receiver must be operated for more

than 20 minutes prior to the adjustment.

2.6 Signal: Received the standard color signal. (65dB±1dBuV)

NTSC: LG standard signal means the digital pattern

13CH(480NC).

PAL/SECAM: LG standard signal means the digital

pattern PAL-B/Gz 05CH

2.7 If not specified, APC ON is APC CLEAR (DYNAMIC).

3. Adjustment content

3.1. Screen Voltage Adjustment

3.1.1.Adjustment (Use factory remote control)

(1) Input in the 75Ωcable LG standard signal

(Digital Pattern,480NC)

(2) Press IN-START KEY and ADJ KEY of SVC T/X

generate horizontal line for Screen adjust.

(3).Turn the screen volume on the FBT clockwise until the

horizontal line is visible and turn it counterclockwise until

horizontal line faintly visible.

(Exit screen voltage adjustment by press “Exit” key of SVC

T/X.)

3.2. Purity and Convergence Adjustment

3.2.1. Purity adjustment

(1). Adjustment Preparation

a. Received Red Raster Pattern for purity adjustment (51CH).

b. Demagnetize the CPT and Cabinet with a degaussing coil.

(2). Adjustment

a. Pre-adjust the static convergence(STC) with the 4 and

6-pole magnet.

b. If the horizontal Line is inline with CPT Mark,2-Pole

magnet should direct 3-9 o’clock direction.

c. If not,direct 2-Pole magnet handle toward 6-12 o’clock

direction and adjust the Horizontal Line to fall onto the

mark opening the magnet at an angle.

d.Push the DY(deflection yoke) all the way to the CPT funnel.

e.Turn the purity magnet(2-pole magnet) so that the “green”

color portion of left side and the “blue” color portion on

the right side have equal amount of color.

f.Pull the DY slowly backward and fix it when the whole

screen becomes red.

(The specified torque for fixing DY screw should be 10Kg/cm.)

3.2.2. Convergence adjustment

(1). Necessary Instrument

a. Degaussing Coil

b. Convergence fixing instrument(special tools)

(2). Adjustment Preparation

a. Operate the unit at the least 15 minutes before adjustment.

b. Using degaussing coil,remove the stains on CPT & Cabinet.

c. Received the Cross Hatch Pattern for Convergence (09ch).

d. Let the Contrast in normal luminance level.

(3). Static Convergence (STC) Adjustment

a. Received the Cross Hatch Pattern for Convergence (09ch).

b. Before adjusting Static Convergence(STC),adjust the

focus first seeing to it that the WHITE color picture quality

is sharp enough.

c. Converge the RED vertical line and BLUE vertical line in

unity(same line) by changing the angle between the 2

tabs of 4-pole magnet.

d. Converge the RED horizontal and BLUE horizontal line

unity(same line) by turning the 2 tabs of the 4-pole magnet.

At this time,do not change the angle between the 2 tabs.

e. Converge the R,G,B vertical line in unity(same line) by

changing the angle between the 2 tabs of the 6-pole magnet.

f. Converge the R,G,B horizontal line in unity(same line) by

turning the 2 tabs of the 6-pole magnet. At this time, do not

change the angle between the 2 tabs.

(4). Dynamic Convergence (DYC) Adjustment

a. Y-Axis Adjustment :Adjust convergence of Y-axis(vertical)

by moving the deflection yoke(DY) left and right.

b. X-axis Adjustment : Adjust convergence of X-axis(horizontal)

by moving the deflection yoke(DY) up and down.

3.3. White Balance Adjustment

3.3.1. Necessary Instrument

(1). Auto white balance meter (Low/High Light Pattern generator)

(2). CRT Color Analyzer, CA-100 :1 set

(3). Factory Remote control

3.3.2. Adjustment preparation : Prior to this adjustment, the

Screen Voltage adjustment should be finished.

3.3.3. Auto Adjustment

(1). Adjust using Auto White Balance Meter.

(2).Enter CPU OFF mode by press the “IN-START” &”MUTE”

key of factory remote control in turn before adjustment.

Exit CPU OFF mode by press the “MUTE” key of factory

remote control after adjustment finished.

In case there is excess RED color at screen voltage

adjustment, adjust it using “Volume -(F)”Key of factory remote

control until the RED color disappear.

- 5 -

ADJUSTMENT INSTRUCTIONS

Only for training and service purposes.

LGE Internal Use Only

GRB GRB

GRB R

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3.3.4. Manual Adjustment

(1). Adjust using white balance meter and factory remote control.

(2). Enter white balance adjustment mode by press “IN-START”

key of factory remote control.

(3). Use the CHD, CHEkey to choose adjustment item.

(4). Use the VOLF,VOLGKey to change item data.

(5). Adjustment Procedure

a. Make the picture luminance 45Ft-L by change the

“CONTRAST” and “BRIGHTNESS”.

b. Adjust X data of high light with R DRIVE and Y data of high

light with B DRIVE to have color temperature as shown below.

c. Make the picture luminance 4.5Ft-L by change the

“CONTRAST” and “BRIGHTNESS”.

d. Adjust X data of low light with R BIAS and Y data of low light

with B BIAS to have color temperature as shown below.

e. Repeat steps a~d until both low and high light have same

reading as shown below.

3.3.5. CW91A WHITE BALANCE IIC PARAMETER

(1) W/B auto adjust machine setting Table

(2) White balance IIC Parameter (Address)

(3) Color coordinate

Tolerance Range : Adjust within ±5 for each X,Y coordinate

(4) White Balance default setting data

3.5. Focus Voltage Adjustment

Adjustment must be done after operating the TV set receiver

sufficiently.

3.5.1. Adjustment Preparation

Received the LG standard pattern (PAL :Digital

Pattern,480NC,13CH, NTSC: Crosshatch pattern, Ch.09 )

and set the picture condition on “APC ON” (CLEAR) mode.

3.5.2. Adjustment Turn the focus volume on the FBT upper

direction to have the best focus vertical line and horizontal

line as shown below.

3.6. SUB-BRIGHTNESS Adjustment (Do not adjust)

This adjustment must be done after the White balance

Adjustment

3.6.1. Adjustment preparation

(1).NTSC

-. Received LG standard Mono scope pattern (CH14).

-. Set the picture condition on “APC ON” (CLEAR) mode.

(2). PAL

-. Received PAL B/G 5CH pattern.

-. Set the picture condition on “PSM ON” (DYNAMIC) mode.

3.6.2. Adjustment

(1). Press the “ADJ” key of the factory remote control twice to

enter to “SUB-BRIGHTNESS” adjustment mode.

(2). NTSC MODEL: Change the Sub-Brightness data by

pressing the VOLF,VOLGKEY so that the number 1 in

gray scale of mono scope pattern almost disappear.

In the ultra slim, Do until the number “1” completely

disappear. (See figure 2)

(3). PAL MODEL: Change the Sub-Brightness data by

pressing the VOLF,VOLGKEY so that the 1th, 2th

Black Level in gray scale of PAL B/G 05CH pattern have

a little bit of difference. (See figure 3)

Program

Sub Add

Start Bit

Stop Bit

Offset

Polarity

EPRom_S

(R)_Amp

Win31_wb TWB

20

5

0

1

72

(R)_Cut

Win31_wb TWB

17

5

0

1

6A

G_Amp

Win31_wb TWB

21

5

0

68

- 6 -

Program

VCD Slave

Win31_wb

TWB

8A

Eeprom_Slave

Win31_wb TWB

A2

Speed

1

Delay

30

VDC IC

EEPROM

NAME MAKER

NOTE

Algorithm

Speed/Plus 2

22

2

G_Cut

Win31_wb TWB

18

5

0

6B

ITEM EU N-EU PhilippinesTaiwan Latin

America

288

295

9000

X

Y

Color

Temperature

282

288

10000

267

276

13000

268

273

13000

266

282

13000

Only for training and service purposes.

LGE Internal Use Only

LOW

LIGHT

HIGH

LIGHT

ITEM

BLO-R(R CUT)

BLO-G(G CUT)

BLO-B(B CUT)

RG(R DRIVE)

GG(G DRIVE)

BG(B DRIVE)

Default setting data

PAL NTSC

32

remark

Fixed

Range

0~63

US 51CH

[Fig 1] Cross-Hatch Pattern(NTSC:US 51CH, PAL:C-8 CH)

[figure 2] MONO SCOPE Pattern signal

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3.6.3. Sub-Tint Adjustment (Do not adjust)

This adjustment has to be done only if the picture has bad

tint otherwise, it can be omitted if the picture has good tint.

(1). Received LG standard pattern signal (SMPTE, 2CH).

(2). Set the picture condition on “APC ON” (CLEAR) mode.

(3). Press the “ADJ” key of the factory remote control three

times to enter to “SUB-TINT” adjustment mode.

(4). Change the Sub-Tint data by pressing the VOLF,VOLGKey

until the upper and lower CYAN color becomes same color.

3.7. Deflection Setting Data Adjustment

These adjustment will be done by Auto Adjustment Equipment.

For manual adjustment, it is also possible by the following

procedure.

3.7.1. Adjustment Preparation

(1) Deflection setting data adjustment can be done only with

remote control.

(2) Press the “INSTART” Key on the factory remote control

continuously to enter to Deflection Adjustment mode.

(3) Press the CHD,EKey to select adjustment item.

(4) Press the VOLF,GKey to change the data.

3.7.2. Adjustment

(1) V SLOPE

Half of the picture (bottom part) changed to blank.

Adjust so that half blanked- Picture bottom line in accord

with geometric vertical center of the CPT.

(2) V SHIFT (Vertical Shift)

Adjust so that the horizontal center line of a digital circle pattern

is in accord with geometric horizontal center of the CPT.

(3) V LINEAR (Vertical Linearity)

Adjust so that the boundary line between upper and lower

half is in accord with eometric horizontal center of the CPT

(4) V AMPLIT (Vertical Amplitude)

Adjust so that the circle of a digital circle pattern may be

located within the effective screen of the CPT.

(5) H SHIFT (Horizontal Shift)

Adjust so that the Horizontal center line of a digital circle

pattern is in accord with geometric vertical center of the CPT.

(6) EW WIDTH (Horizontal Width)

Adjust to that a digital circle pattern looks like exact circle.

(7) EW PARAB (East-west PARABOLA)

Adjust so that middle portion of the outer most left and

right vertical line looks like parallel with vertical lines of

the CPT.

(8) EW TRAPE (East-west TRAPEZOID)

Adjust to make the length of top horizontal line same

with it of the bottom horizontal line.

(9) EW UPCOR

Adjust until symmetries upper corner of the screen.

(10) EW LOCOR

Adjust until symmetries upper corner of the screen.

(11) H BOW

Adjust the left and right crooked line on upper and lower side.

(12) H PARALL(ANGLE)

Adjust the vertical slope.

(13) SCORRECT (S-CORRECTION)

Adjust so that all distance between each Vertical lines

are to be the same.

* Pre-settled according to the CPT.

(14) V SCROLL

* Recommend initial setting data

(15) V ZOOM (Vertical Zoom)

* Pre-settled according to the CPT

3.8. Deflection setting Initial data ( SERVICE 2 )

Adjust : It is possible to adjust data.

Recommend : It is recommended, if necessary it is

possible to adjust.

FIX : Don’t change data.

[figure 3] PAL B/G 05CH signal

1th VS 2th

BLACK LEVEL have a

little bit of difference.

(In case of VIETNAM

MODEL 2th VS 3th)

- 7 -

Only for training and service purposes.

LGE Internal Use Only

[Figure] PAL Digital Pattern [Figure] NTSC Digital Pattern

(US13CH)

[Figure] Cross-Hatch Pattern (NTSC:US 51CH, PAL:C-8 CH)

UPCOR

LOCOR

EW PARAB

US 51CH

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- 8 -

Only for training and service purposes.

LGE Internal Use Only

3.10. OPTION Adjustment data Table

3.10.1. Preparation for Adjustment

(1) This decides function in accordance with model.

Press the SVC TX adjustment button (IN-START button) at

SVC mode, then adjust the option at OPTION 1, 2, 3, 4 mode.

(2) Mark the option adjustment data like (0,128,65,96) in BOM.

Mark of BOM

The OPTION 1 data is 90, the OPTION 2 data is 96, the

OPTION 3 data is 4, the OPTION 4 data is 17 in this model.

3.10.2. Adjustment Method

(1) Input data directly by the buttons corresponded with

OPTION 1 ?? (0~255), OPTION 2 ?? (0~255),OPTION 3 ??

(0~255), OPTION 4 ?? (0~255).

(2) Select each OPTION function by the CH UP/DOWN button

and then set up each OPTION by the VOL UP/DOWN button.

3.9.3. Picture Setting SVC DATA3 ( SERVICE 4 )

Flat (LPDK) Slim

ITEM

AGC

RG

GG

BG

BLO-R

BLO-G

BLO-B

CDL

L-DLY

RGB-BRI

SUB-BRI

SCR-BRI

AGC take over

Red Gain

Green Gain

Blue Gain

Black level offset Red

Black level offset Green

Black level offset Blue

Cathode Drive Level

Luminance delay time

OSD/TEXT BRIGHTNESS

21

32

9

8

15

30

21

32

9

8

15

30

Description

CPT

.

PAL NTSC Remarks

ITEM

FMWS

MONO

DSG

AGN

BPB

AVLE

AMLOW

BPB2

FFI

DCXO AVL

FM window size

FM demodulator

Audio in/out gain

FM Sound output gain

Bypass BPF(for mono demodulator)

Enable AVL on EW pin

AM sound output gain

Bypass second BPF

Fast filter IF-PLL

DCXO value

2

1

0

1

0

1

FM Prescaler(Stereo L/R)

Description

29"

Slim

29"

FLAT

(AK)

29"

Slim

AK2

Remarks

29"

TS

Slim

ITEM

V SLOPE

V SHIFT

V LINEAR

V AMPLIT

H-SHIFT

EW WIDTH

EW PARAB

EW TRAPE

EW UPCOR

EW LOCOR

H BOW

H PARALL

SCORRECT

V SCROLL

V ZOOM

WBR

WBF

V SYNSLI

Vertical slope

Vertical shift

Vertical linearity

Vertical amplitude

Horizontal shift

EW width

Parabola adj

Trapezoid adj

Upper corner adj

Lower corner adj

Horizontal Bow

Horizontal parallelogram

S correction

Vertical Scroll

Vertical zoom

Timing of Wide Blanking

Vertical slicing level

Description

adj.

Recommend

ITEM

WS

BKS

BSD

DSK

COR

PF

RPO

RPA

PWLDAC

IFOFF

CHSE

ACL

BLOC

TEXT-V

TEXT-H

VGUARD

TFR

GAMMA

OSDHPOS

White stretch

Black stretch

Black stretch depth

Dynamic Skin Control

Coring (Peaking)

Peaking center freq. & delay

Ratio pre & over shoot

Ratio pre & after shoot

Peak white limiting

IF demodulator offset

Chroma sensitivity

Automatic color limiting

Black level offset control

Text V position

Text H position

Vertical guard

Black level shift

OSD Gamma correction

OSD Horizontal Position

Description

1

0

1

3

0

3

1

3

45

1

5

28

5

1

3

1

0

1

3

0

3

1

3

45

1

5

28

5

0

1

3

Remarks

Slim Flat

LEVEL PART NO. SPECIFICATION DESCRIPTION JOP EXP.

1. EBT30431523 MAIN, CW91A CHASSIS ASSY (0,128,65,96)

3.9.2. Picture Setting SVC DATA1 ( SERVICE 3 )

3.9. SVC Adjustment data table

3.9.1. Picture Setting SVC DATA1 ( SERVICE 1 )

19

31

23

18

24

28

29

43

44

42

26

32

21

25

7

2

0

17

41

43

40

29

48

24

32

46

47

38

26

32

21

25

7

2

0

14

43

37

33

32

17

16

40

33

34

37

38

41

21

25

7

2

0

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- 9 -

Only for training and service purposes.

LGE Internal Use Only

3.10.3. OPTION1 Function

REMARK

FUNCTION

OPTION

0

1

2

3

0

1

0

1

CW91A

CW91C

RESERVED

29INCH

21INCH

WITHOUT PIP

WITH PIP

CHASSIS

INCH

PIP

CODE

3.10.4. OPTION2 Function

REMARK

FUNCTION

OPTION

0

1

0

1

0

1

0

1

LOW CURVE

HIGH CURVE

WITHOUT DUAL SAVING

WITH DUAL SAVING

FM NORMAL DEMODULATION

FM HIGH DEVIATION DEMO-

WITHOUT A2STEREO

WITH A2STEREO

VOL CURL

DUAL

HIDEV

A2STEREO

CODE

3.10.5. OPTION2 Function

REMARK

FUNCTION

OPTION

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

WITHOUT SCART

WITH SCART

WITHOUT DVD

WITH DVD

WITHOUT SIDE A/V

WITH SIDE A/V

6KEY

4KEY

WITHOUT EYE

WITH EYE

WITHOUTGAME MODULE

WITH GAME MODULE

WITHOUT X-WAVE

WITH X-WAVE

WITHOUT DEGAUSS

WITH DEGAUSS

SCART

DVD

SAV

4KEY

EYE

GAME

XWAVE

DEGAUSS

CODE

3.10.6. OPTION4 Function

REMARK

FUNCTION

OPTION

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

ENGLISH

NIGERIAN

RESERVED

ENGLISH

EASTASIA

RESERVED

OSD LANG

TXT LANG

TELE TEXT

CODE

3.11. IN STOP Mode setting

Power

Input

LAST CHANNEL

MEMORY

CHANNEL

SOUND

CSM

MUTE

TORBO SOUND

XD

PSM

SSM

BOOSTER

CHILD LOCK

AUTO SLEEP

AVL

BALANCE

EYE

DEGAUSS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

ITEM

No. Status

OFF

TV

03CH

VHF: 2~13CH

UHF : 14, 30. 51. 55, 63CH

CATV : 15,16,17, 55, 95CH

30 STEPS

Stamdard

OFF

ON

Dynamic

FLAT

OFF

0

OFF

REMARK

OPTION

3.12. TV/CABLE TV CHANNEL Operation Condition

1. Necessary parts and instruments

(1) Remote controller (with AIR/CABLE TV button)

2. Checking

(1) Check receiver channel operation for some abnormality

by pressing AIR/CABLE TV button continuously.

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TROUBLE SHOOTING

- 10 -

1. RF-STEREO MODEL

1) PICTURE OK / NO SOUND

Check/ Replace TU101 or Input signal

NO

OK

Selected correct system in menu

Check the waveform IF of TU101

Check the voltage at pin 2, 11, 18, 35,

36, 55, 61, 68, 75 of UOC-TOP QFP80

NO

Check/ Replace IC501

NO

Check the voltage at pin 25, 26 of

UOC-TOP QFP80

NO

OK

Check the waveform at pin 64,71of

IC501

OK

Check the waveform at pin 1, 64of

IC601

Check/ Replace Q601

NO

OK

Check the waveform at pin 63 of IC601

Check/ Replace IC601

NO

OK

Check the waveform at pin 2, 72, 76 of

IC601

Check/ Replace R822, D827

Check the Heater voltage of

CPT(6.0~6.4 Vrms)

Check R, G, B out of CPT board

Check IC901,

P403

Check 200V line of CPT Board &

if no problem check and Replace

Check the Heater pulse of FBT T402

Check FR901, P403,

P902B, FR401

Check FBT T402

Check HV, Screen voltage of CPT

Check FBT T402

NO

OK

Check the waveform at pin 71, 77 of

IC601

2) No Raster / Sound OK(1/2)

Only for training and service purposes.

LGE Internal Use Only

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- 11 -

3) No Raster (2/2)

Check the in/out of

regulator(IC823,

IC824, IC827)

Check pin 20 of

IC501(H_Out) Check the voltage of

C832

Check/ Replace Fuse

Is the voltage each

pin voltage of IC501

Check Fuse of AC line

Check/ Replace

IC501

Check T401 & each

pin voltage

Check Q401collect

waveform

Check & Replace

T402

Check the voltage

pin4 of IC810

Check/ Replace

IC810, IC802, Q830

Check Fuse and Diode of secondary

Load of SMPS trans(T801)

Check the B+at D829

cathode

OPEN

Check/ Replace DB801

NO

Check/ Replace Fuse and IC810

NO

OK

NO

Normal Abnormal

Check/ Replace

Q402

Check/ Replace

T401

Check/ Replace

Q401

Check Q402

collector waveform

Check/ Replace IC501

NO

OK

Only for training and service purposes.

LGE Internal Use Only

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- 12 -

4) No Picture/ No Sound

Is any OSD displayed?

OK

NO

OK

NO NO

OK

NO

OK

P20A (R, G, B out of

IC501)

P20A (R, G, B out of

IC501)

Replace IC501

Check pin77, 76

SCL, SDA

Check IC12(EEPROM)

& SCL, SDA, Line

Check pin68 Reset

Voltage

Check IC501 pin 8,

7, 6 (R, G, B out)

Check SMPS Trans

Secondary Voltage

Go to No sound/

picture OK

Check the waveform

pin20(H-out)

Check IC501 pin 8,

7, 6 (R, G, B out)

Check receiving system in MENU

& execute Auto - Program

Does the auto - Program

operate properly

Store on manual -program MENU

Only for training and service purposes.

LGE Internal Use Only

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- 13 -

2. AV STEREO/ MONO MODEL

Select correct system in menu

OK

OK OK

NO

Does the auto - Program

operate properly Check TU101 Tuner

Check the voltage of pin2, 11,

18, 35, 36,55,61, 68, 75 of IC501

Check the waveform at

pin26, 25 of IC501

OK

Check the signal line of SPK-N,P

Check the waveform at

pin4, 12, of IC601

NO

OK

Check pin71 (mute) of IC501

Check the waveform at

pin6 of IC601

OK

NO

Check the connection of AV

equipment

AV

OK

Check the connection of side

AV Board P201A

Check the voltage at

pin5, 7 of IC601

Check/ Replace

R822, D827

Correct the Board

Check the waveform at

pin8, 9, 11, 12 of IC601

Replace IC601

Only for training and service purposes.

LGE Internal Use Only

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- 14 -

PRINTED CIRCUIT BOARD

MAIN

Only for training and service purposes.

LGE Internal Use Only

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- 15 -

CONTROL

LED

Power

Only for training and service purposes.

LGE Internal Use Only

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BLOCK DIAGRAM

- 16 -

SOUND AMP

LA42102N

(

((

(

FBT

200V

28V

ABL

HEATER

B+ Collector

14V

B+

(115V)

SMPS

TRANS

EER4942

40V

AC

INPUT

(100~240V)

15

11

2

10

9

8

5

4

-14V

1

IC824

ST-6V REG

16

Rear_AV(1)

( PHONE/ SCART)

Rear_AV(1)

( PHONE/ SCART)

IC12

EEPROM

24C16

SIF

3

14V

Rear_AV(2)

( PHONE/SCART/DVD)

Rear_AV(2)

( PHONE/SCART/DVD)

MenuOKVOL-VOL+PR-PR+

SDA

SCL

5V

33V

12

13

VER. AMP

LA78141

IF VIF

VIF

Saw Filter

3

H OUT TR

2SC6090

Tuner

STR-

W6556

STR-

W6556

RGB Amp

TDA6107AJF

RGB Amp

TDA6107AJF

Sound Vcc

6.5V

IC823

3.3V REG

IC826

5V REG

V Heater

HV

Vscreen

202KJ102KJ

RK,GK,BK

24.576Mhz

21V

5V

R,G,Bout

IK

SIF IN

VIF IN

42

41

46

45 20

21

H-FB

HOUT

49

EW

34

RF/MNT Vout

31 32 33

AV1 V,L,R

28 29 30

AV2 V,L,R

23 24

RF/MNT L,Rout

12 13 14 15

R,G,B FB

Or Y,PB,PR

SPK L,Rout

48

47

VB

VA

6789

R,G,B,IK

60 X-TALIN

59 X-TALOUT

63

ABN

65

DEG

66

EYE

1

IR

76

77

SDA

SCL

2

10

ABL

5

75

3.3V

56

DECDIG(2.5V)

55

35

18

5V

36

8V

1

68

1.8V

67

KEY

25 26

64 PWR

71

S-MUTE

72 SAW S/W

6

57

2

4

SPK R

SPK L

S-MUTE

1.8V(RF ST)

2.5V

8V(AV ST Opt)

5V

ST-3.3V

EW IC

KIA4558

HV &

H Comp

Circuit

HV

TO DY

ST- 3.3V

ST- 5V

220V

RF ST OPT

H DRIVE

TRANS

38V

31V

RF ST OPT

Comp In

Scart in

Only for training and service purposes.

LGE Internal Use Only

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MEMO

- 17 -

Only for training and service purposes.

LGE Internal Use Only

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- 18 -

EXPLODED VIEW

300

120

310

530

600

540

504

331

330 320

590

112

913

170 150

943

400

105

503

520

174

501

580

option 570

option

Many electrical and mechanical parts in this chassis have special safety-related characteristics.These

parts are identified by in the Schematic Diagram and EXPLODED VIEW.

It is essential that these special safety parts should be replaced with the same components as

recommended in this manual to prevent X-RADIATION,Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

Only for training and service purposes.

LGE Internal Use Only

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P/N:3854VA0196H

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SVC. SHEET : 3854VA0196H-S

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LG 29FU1RL/RG User manual

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