Lg 14fu7rb User manual

COLOR TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : MC059D

MODEL : 14FU7RB

MODEL : 14FU7RB-T2

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

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

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

Feb., 2010

Printed in ChinaP/NO : MFL40183504

Internal Use Only

- 2 -

CONTENTS

CONTENTS............................................................................................... 2

SAFETY PRECAUTIONS...........................................................................3

SPECIFICATIONS......................................................................................4

ADJUSTMENT ...........................................................................................6

TROUBLE SHOOTING.............................................................................11

BLOCK DIAGRAM...................................................................................15

PRINTED CIRCUIT BOARD ....................................................................16

EXPLODED VIEW....................................................................................18

Only for training and service purposes. LGE Internal Use Only

- 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 1MΩand 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

- 4 -

General specification

SPECIFICATIONS

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

Item

Receiving System

Available Channel

Input Voltage

Market

Screen Size

Aspect Ratio

Display Method

Tuning System

Operating Environment

Storage Environment

Specification

NTSC M (AV 3.58)

NTSC M (AV 3.58)/ PAL M/N

PAL BG, DK, I/NTSC M (AV 3.58/4.43)

SECAM DK

1) VHF : E2 ~ E12

UHF : E21 ~ E69

CATV : S1 ~ S20

HYPER : S21 ~ S41

2) VHF: 02 ~ 13CH (12CH)

UHF : 14 ~ 69CH (56CH)

CATV : 01~125CH (113CH)

AC110 ~ 240V@50/60Hz

Mideast,Africa, Middle South America

Conventional 14

4: 3

CRT

FVS 100 Program

1) Temp : 0 ~ 45 deg

2) Humidity: Below 85 %

1) Temp: -20 ~ 60 deg

2) Humidity: Below 85 %

Remark

Mideast/Africa

L America/Philippines/Taiwan

China/Indonesia/Thai/Vietnam

CIS

PAL MODEL

NTSC MODEL

Mideast/Africa

Middle South America

NTSC MODEL

PAL MODEL

No.

Only for training and service purposes. LGE Internal Use Only

Scope

This specification is applied to the MC-059D CHASSIS Colour

TV.

Specification

Each part is tested as below without special appointment.

1) Temperature : 25 ± 5°C (77 ± 9°F), CST : 40 ± 5°C

2) Relative Humidity : 65 ±10%

3) Power Voltage :

4) Specification and performance of each parts are followed

each drawing and specification by part number in

accordance with BOM.

5) Warm up TV set for more than 20min, before the

measurement.

Test Method

1) Capacity: It follows the TV QC Standard of LGE

2) Other standard.

Standard Input Voltage

110 ~ 240V@50/60Hz

Remark

Market

Mideast/Africa

Middle/South America

Compliance

Safety: As CB standand (IEC60065)

EMC: CE standard (EN55020, EN55013)

Market

Mideast/Africa

Middle/South America

- 5 -

Features and Function

Feature

Key

Station

Picture

Time

Special

Audio Input

Local Key

Remocon

Audio program

Manual program

Program edit

Favorite channel

PSM

CSM

Clock

Off time

On time

Auto Sleep

Language

Input

Child lock

Blue back

Specification

1 Rear (Mono)

6EA/Front: ON/OFF, MENU, Vol (F, G), PR(E, D)

7EA/Front: ON/OFF, MENU, OK, Vol (F, G), PR(E, D)

LG Code

System

Storage from

Normal search

Turbo search

Storage

System

Channel

Name

8CH Memory

Dynamic

Standard

Mid

Game

User

Standard

Reddish

Greenish

Bluish

--:--

--:--/On/Off

--:--/Pr/Vol./On/Off

On/Off

English

French

Parsi

Arab

TV/AV

On/Off

Remark

Non regulation region

Regulation region

PAL MODEL BG/I/DK

V/UHF or Cable

" or "

Detail drawing Control item:

contrast

Brightness

Colour

Sharpness

Settting now time

Setting shut time

Setting turn on

No signal power off action

English

France

Parsi

Arab

No.

Only for training and service purposes. LGE Internal Use Only

Item

1. Scope of Application

These instructions are applied to MC-059D Chassis.

2. Notes

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) Adjustment must be done in the correct order.

3) The adjustment must be performed in the circumstance of

25°C±5°C of temperature and 65%±10% of relative

humidity if there is no specific designation.

4) The input voltage of the receiver must keep PAL: 100~240V

±10%,50/60Hz (China/Indonesia/Thailand/Vietnam/CIS

market) in adjusting.

5) The receiver must be operated for about 20 minutes prior to

the adjustment.

6) Signal: Receive the standard color signal. (65dB±1dBuV )

PAL/SECAM: LG standard signal means the digital pattern

PAL-B/G 05CH

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

3. AGC Voltage Adjustment

3-1. Necessary Instrument

- Digital Multi meter : 1 set

- Max Input Current : Over 1A/ Max Input Voltage : 500Vdc

- Measurement Range : 10mV-100mVdc/ Accuracy : 0.03%

3-2. Adjustment Preparation

1) Input LG standard signal 65dB (±1dB) into 75Ωcable.

2) Connect the digital multi-meter to J105. (AGC Check

Marking)

3-3. Adjustment

1) Select the VP 0(RF AGC) adjustment mode by pressing

IN-START key on the SVC remote control.

2) Press VOL +/- (F, G) key until the muti-meter shows

reading as below:

3) CAUTION:

Since the signal strength can be easily changed by the

condition of signal cable, you need to check the signal

strength frequently in order to prevent error.

4. Screen Voltage Adjustment

4-1. Adjustment (Use factory Remote Control)

1) Input in the 75Ωcable LG standard signal (Digital

Pattern,480NC)

2) Press the “ADJ’ key of factory remote control once to

make TV set display horizontal line.

3) Turn the Screen Vol. on the FBT clockwise to appear

Horizontal Line and turn it counterclockwise until

horizontal line faintly visible.

(Exit screen voltage adjustment by press " Enter (A) key of

factory remote control.)

5. Purity and Convergence Adjustment

5-1. Purity Adjustment

(1) Adjustment Preparation

1) Receive Red Raster Pattern for purity adjustment

(51CH).

2) Demagnetize the CPT and Cabinet with a degaussing

coil.

(2) Adjustment

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

6-pole magnet.

2) If the horizontal line is inline with CPT Mark, 2-pole

magnet should direct 3-9 o'clock direction.

3) If not, direct 2-pole handle towards 6-12 o'clock direction

and adjust the horizontal line to fall onto the mark

opening the magnet at an angle.

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

5) 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.

Review <Fig. 1>

6) 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). See <Fig. 2>

5-2. Convergency Adjustment

(1) Necessary Instrument

1) Degaussing Coil

2) Convergency fixing instrument (special tools)

(2) Adjustment Preparation

1) Heat run over 30 minutes before adjustment.

2) Demagnetize the CPT and Cabinet by using degaussing

coil.

3) Receive Cross Hatch Pattern for Convergence (09CH).

4) Let the contrast in normal luminance level.

(3) Static Convergence (STC) Adjustment

1) Receive Cross Hatch Pattern for Convergence (09CH).

2) Adjust the focus first seeing to it that the WHITE color

picture quality is sharp enough.

3) Change the angle between the 2 tabs of 4-pole magnet

until vertical Red and Blue lines are unified.

4) Turning the 2 tabs of 4-pole magnet until horizontal Red

and Blue lines are unified. At this time, do not change

the angle between the 2 tabs.

- 6 -

ADJUSTMENT

G R B

G R B G R B

<Fig. 1>

<Fig. 2>

Only for training and service purposes. LGE Internal Use Only

Maker

LG Innote

SANYO

LG Innote

Tuner Spec.

TAEW-G013D

115-B-A86EL

TAEA-G001D

Signal

65dBu

Remark

PAL

AGC Vol.

2.3±0.05V

Tuner P/N

6700MF0014A

6700PF0006B

6700MF0018B

- 7 -

5) Converge the R,G,B vertical line in unity by changing the

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

6) Converge the R,G,B horizontal line in unity 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

1) Y-Axis Adjustment : Adjust by moving DY right and left

2) X-Axis Adjustment : Adjust by moving DY up and down.

5-3. Block Diagram

Adjustment fundermental is before CPT factory without ITC

adjustment, need according to below order.

6. White Balance Adjustment

6-1. Necessary Instrument

1) Automatic White Balance Meter (Low/High Light Pattern

generator)

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

3) Factory Remote Control

6-2. Adjustment Preparation

Prior to this adjustment, the Screen Voltage adjustment

should be finished.

6-3. Automatic Adjustment

1) Adjust using Automatic White Balance Meter.

2) Enter CPU OFF Mode by press "IN-START" & "MUTE"

key of factory remote control in turn before adjustment.

After finishing adjustment, press the TV/AV key to exit.

*In case there is excess RED color at screen voltage

adjustment, adjust it using "VOLUME -(F)" key of remote

control until the RED color disappear.

6-4. Manual Adjustment

1) Adjust using white Balance meter and Factory Remote

controller.

2) Enter white balance adjustment mode by pressing

"INSTART" 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 changing the

“CONTRAST” and “BRIGHTNESS”.

b. Adjust X data of high light with R-DRIVE(VP7) and Y

data of high light with B-DRIVE(VP9) to have the color

temperature as shown below.

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

“CONTRAST” and “BRIGHTNESS”.

d. Adjust X data of low light with R-BIAS(VP4) and Y data

of low light with B-BIAS(VP6) to have the color

temperature as shown below.

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

same readings as shown below.

7. Focus Voltage Adjustment

This adjustment must be done after operating the TV set

receiver sufficiently.

7-1. Adjustment Preparation

Received LG standard pattern (Digital Pattern, 480NC,13CH)

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

7-2. Adjustment

Turn the focus volume on the FBT upper direction to have the

best focus vertical line and horizontal line as below:

DY and Magnet

assembled

CPT Assembly

Before CPT assembly, on CPT

NECK and DY, adhibit TAPE on

CPT contact part.

TAPE need OVER-LAPPING ,

parallel with NECK

STANDARD

more than 15 min Heat-Run

DY FIX Torque 9 ~ 11Kg f.cm

Magnet place

DY adjustment, can not engender

CPT neck shadow.

Convergence Magnet

Heat Run

Degaussing

STC Adjustment

Purity Adjustment

DY Fix

SCREEN Voltage ADJ

W/B Fix

FOCUS ADJ.

STC ADJ.

DYC ADJ.

6pole 4 2

15 ~ 20mm

Market Color Temperature X-AXIS Y-AXIS Remark

PAL 12,000°K 268±3 273±3 Auto white balance meter standard

<Fig. 3>

Only for training and service purposes. LGE Internal Use Only

- 8 -

8. Deflection setting data adjustment

These adjustment will be done by Automatic Adjustment

Equipment.

For manual adjustment, it is also possible by the following

procedure.

8-1. Adjustment Preparation

1) Set the Deflection data with the SVC Remote control.

2) Select the Deflection adjustment mode by pressing IN-

START key.

3) Press the CHD, CHEkey to select adjustment item.

4) Press the VOLF, VOLGkey for data changing.

8-2. Adjustment

1) Horizontal Position Adjustment

Select VP1(H-POS) and adjust so that the left and right

vertical line are symmetrical as possible.

2) Vertical Position Adjustment

Select VP2(V-POS) and adjust so that the horizontal center

line coincide with geometric horizontal center of the CPT.

3) Vertical Size Adjustment

Select VP3(V-SIZE) and adjust so that the middle circle of

the Digital Pattern (480NC, 13CH) coincide with the

effective screen of CPT.

9. Auto Adjustment Preparation Sett-

ing Data Table

10. EEPROM OPTION TABLE

You can find the EEPROM Option Data if entering IN-START

key of the adjustable remote control and then pressing MENU

key.

OPTION 1

DVD

TURBO ME

V-CURVE

V-MUTE

EYE

PS2 NOCLR

SND MUTE

GAME

OPTION2

TURBO

ARC

200PR

BLUEBACK

TURBO AT

SHARP

DVDN 6P

SLIM

OPTION3

FM TRANS

NTSC

AV PSEU

Q PACK

A2 SW

LNA

QURAN

XD MENU

OPTION 4

SYSTEM

SND MODE

LOC KEY

COLOR T

PLL DIV

OPTION 5

FM PRE

NICAM PRE

SCART PRE

A2 FM TH

FIRST TH

ZWT

INITIAL

REMARK

DVD function (1:Yes, 0:No)

T-P,T-S function display on MENU

VOLUME CURVE (1:HIGH, 0:LOW)

VIDEO MUTE

EYE function (1:Yes, 0:No)

FIX 1

SOUND MUTE at no signal

GAME function (1:Yes, 0:No)

REMARK

TURBO P/S function (1:Yes, 0:No)

ARC function (1:Yes, 0:No)

200CH. MEMORY

BLUEBACK display (1:Yes, 0:No)

TURBO SEARCH function (1:Yes, 0:No)

SHARPNESS DATA (1:+10, 0:NORMAL)

DVD 6P (1:Yes, 0:No)

SLIM OPT (1:Superslim, 2: Normal Flat)

REMARK

FM TRANS function (1:Yes, 0:No)

NTSC function (1:Yes, 0:No)

AV ST MODE (1:PSEUDO, 0:MATRIX)

Q PACK Fuction (1:Yes, 0:No)

MONO DUAL function (1:5.74MHz, 0:NORMAL)

LNA TUNER (1:LNA, 0:NORMAL)

QURAN Function (1:Yes, 0:No)

XD MENU OPT (1:Yes, 0:No)

REMARK

0:ENG/1:ARAB/2:FARSI

0:MONO / 1:AV ST

0:NO AV / 1:AV1 / 2:AV1,2

0:4KEY / 1:6KEY / 2:8KEY/3:POWER

COLOR TABLE

PLL DATA (NTSC Tuning Level)

REMARK

FM PRESCALER

NICAM PRESCALER

SCART PRESCALER

A2 PRESCALER

MONO THRESHOLD

A2 THRESHOLD

Speed

SLave ADD VIDEO IC

BA EEPROM

A2 Delay

EEPROM

Sub Add 74 71 76 73

SpeedPlus

Step/Data

3 3 3 3

Sub Add

Start Bit

Stop Bit

Masking

Direction

VCD TV PC

B(R)AMP

B(R)CUT

G(B)AMP

G(B)CUT

B AMP B CUT G AMP G CUT

Only for training and service purposes. LGE Internal Use Only

VP 0

VP 1

VP 2

VP 3

VP 4

VP 5

VP 6

VP 7

VP 8

VP 9

VP 10

VP 11

VP 12

VP 13

VP 14

VP 15

VP 16

VP 17

VP 18

VP 19

VP 20

VP 21

VP 22

VP 23

VP 24

VP 25

VP 26

VP 27

VP 28

VP 29

VP 30

VP 31

VP 32

VP 33

VP 34

VP 35

VP 36

VP 37

VP 38

VP 39

VP 40

VP 41

VP 42

VP 43

VP 44

VP 45

VP 46

VP 47

VP 48

VP 49

VP 50

VP 51

VP52

VP53

OSD

RF AGC

H POS

V POS

V SIZE

R BIAS

G BIAS

B BIAS

R DRIVE

G DRIVE

B DRIVE

V LIN

V SCORR

V COMP

H BLK L

H BLK R

AFC GAIN

H FREQ

CD MODE

VBLK SW

FBP SW

YC FILTER

Y APF

C SYSTEM

C VCO

PAL APC

S TRAP SW

VIF SYS

VCO FREQ

SIF SYS

SUB BIAS

BRIGHT

ABL

BRI STOP

ABL TH

RGB TEMP

COR GAIN

PRE SHOOT

OVER SHOOT

Y GAMMA

DC REST

B-ST START

B-ST GAIN

C BYPASS

C KILL ON

C KILL OFF

C KILL OPER

RB BAL

RB ANG

B-Y LEVEL

R-Y LEVEL

V LEVEL

OVER MO SW

OVER MO LE

TINT TH

Adjustment

RF AGC Delay

H PHASE

V Shift (V POSI)

Vertical Size

Red Bias

Green Bias

Blue Bias

Red Drive

Green Drive

Blue Drive

V LIN (Vertical Linearity)

Vertical S-Correction

V.COMP

H BLK L

H BLK R

AFC Gain & gate

H Freq.

Count Down Mode

VBLK SW

FBP Blanking OR SW

Filter System

Y APF Select

Color System

C/VCO Adjustment

PAL APC SW

S.TRAP SW

VIF System SW

VCO Freq

SIF System SW

Sub Bias (sub-bright)

Brightness Control

Bright ABL Defeat

Bright Mid Stop Defeat

Bright ABL Threshold

RGB Temp SW

Coring Gain Select

Pre-shoot Adjustment

Over-shoot Adjustment

Y Gamma start point Select

DC Restoration Select

Black Stretch Start Point Select

Black Stretch Gain Select

C Bypass

C Kill On

C Kill Off

Color Killer Operational Point

R/B Gain Balance

R/B Angle

B-Y DC Level

R-Y DC Level

Video Level

OVER.MOD.SW

OVER.MOD.LEVEL

Tint Through

Range

0 ~ 63

0 ~ 31

0 ~ 15

0 ~ 127

0 ~ 255

0 ~ 127

0 ~ 15

0 ~ 127

0 ~ 31

0 ~ 3

0 / 1

0 ~ 63

0 ~ 7

0 / 1

0 ~ 15

0 / 1

0 ~ 7

0 / 1

0 ~ 3

0 ~63

0 ~ 3

0 ~ 127

0 / 1

0 ~ 7

0 / 1

0 ~ 3

0 / 1

0 ~ 7

0 ~ 15

0 ~ 7

0 / 1

0 ~ 15

0 / 1

Initial setting

110

127

125

127

112

Remark

Necessary

Unnecessary

Necessary

Unnecessary

Necessary

Unnecessary

- 9 -

11. IIC BUS Adjustment Data Table

Only for training and service purposes. LGE Internal Use Only

- 10 -

VP 54

VP 55

VP 56

VP 57

VP 58

VP 59

VP 60

VP 61

VP 62

VP 63

VP 64

VP 65

VP 66

VP 67

VP 68

VP 69

VP 70

VP 71

VP 72

VP 73

VP 74

VP 75

VP 76

VP 77

VP 78

VP 79

VP 80

VP 81

VP 82

VP 83

VP 84

VP 85

VP 86

VP 87

VP 88

100

101

102

103

104

105

106

107

108

109

OSD

Y TH

Y GAIN

R WIDTH

R OFFSET

B WIDTH

B OFFSET

T DISABLE

V TRANCE

A MUTE

V MUTE

SYNC KILL

V KILL

FSC SW

GRAY

CROSS BW

H-TONE

RGB BLK

C EXT

CRCB IN

AUDIO SW

VOL FIL

FM MUTE

IF AGC

A-OUT SW

DE-EMPH

FM GAIN

VOLUME

VDC

VSEPUP

VRES TM

HLLDET

ERGBL OUT

S TRAP

C TRAP

DIG OSD

VM AUD SW

VIN RGB SW

FLESH

WPL Ope

VM Gain

SYNC SS

GY AMP

HTNOC

OVER MT

APC OFF

VL OFFS

A2 SW

VCO AD

EQU AD

Bel AD

EQU ON

BA SW

SECKOFF

SECK ON

OSD CONT

OSD POS

Adjustment

Y TH

Y Gain

R width

R offset

B width

B offset

T Disable

V TRANCE

Audio Mute

Video Mute

Sync Kill

Vertical Kil

SVO or fsc Output

Gray Mode

Cross B/W

Half Tone

Blank Defeat

C Ext

CbCr IN

Audio SW

VOL. FIL

FM Mute

IF AGC Defeat

A.MONI.SW

De-emphasis TC

FM Gain

VOLUME

Vertical OUT DC Level

V-sync Separation Up

Vertical Reset Timing

Vertical sync system (H lock)

External RGB Contrast

S Trap Test

C. Trap Test

Digital OSD sw

VM output or Ext Audio input

Video input or Ext RB input

Auto-Flesh

WPL operating Point

VM Gain

Sensitivity of sync separation

G-Y Amplitude

Color on/off on Half tone Mode

Overmodulation circuit Type

APC Offset current

IF video level offset

5.74MHz FM Det

IF VCO freerun frequency

Equalizer

Bell filter

Equalizer circuit

Bell filter adjust

SECAM Killer circuit disable

SECAM Killer circuit enable

OSD Contrast

OSD Position

Range

0 ~ 3

0 / 1

0 ~ 3

0 / 1

0 ~ 127

0 ~ 63

0 / 1

0 ~ 15

0 ~ 7

0 / 1

0 ~ 3

0 ~ 7

0 ~ 15

0 / 1

0 ~ 7

0 ~ 3

0 / 1

0 ~ 15

0 / 1

0 ~ 7

1 ~ 60

Initial setting

126

Remark

Unnecessary

Only for training and service purposes. LGE Internal Use Only

- 11 -

1. TV FUNCTIONAL

2. TU / IF SECTION

3. VIDEO PROCESSING

TROUBLE SHOOTING

Only for training and service purposes. LGE Internal Use Only

- 12 -

4. SMPS PRIMARY SECTION

5. SMPS SECONDARY SECTION

Only for training and service purposes. LGE Internal Use Only

- 13 -

6. VERTICAL SECTION

7. HORIZONTAL SECTION

Only for training and service purposes. LGE Internal Use Only

8. SOUND PROCESSING SECTION

- 14 -

9. CPT DRIVE SECTION

Only for training and service purposes. LGE Internal Use Only

- 15 -

BLOCK DIAGRAM

Only for training and service purposes. LGE Internal Use Only

- 16 -

MAIN

PRINTED CIRCUIT BOARD

Only for training and service purposes. LGE Internal Use Only

- 17 -

MEMO

Only for training and service purposes. LGE Internal Use Only

- 18 -

EXPLODED VIEW

174

112

913 170 150 153

520

105

120

330

320

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943

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

OPTION

Only for training and service purposes. LGE Internal Use Only

P/N: 3854VA0196C

LGE Inter nal Use Only

Only for training and service purposes.

SVC. SHEET : 3854VA0196C-S

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