LG 14CC3AB-T2, 14CC4AB-T2, 14CC4CB-T2, 14CC4RB-T2, 14CC8AB-T2 Service manual & schematics

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

Copyright©2010 LG Electronics.Inc. All right reserved.
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 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.

IMPORTANT SAFETY NOTICE

0.15uF

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

AC Volt-meter

Good Earth Ground
such as WATER PIPE,

To Instrument’s
exposed
METALLIC PARTS

CONDUIT etc.

1.5 Kohm/10W

- 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
AC110 ~ 240V@50/60Hz
Mideast,Africa, Middle South America

Conventional 14
4: 3
CRT
FS
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.

1

2

3

4
5
6
7

8

9

10

Copyright©2010 LG Electronics.Inc. All right reserved.
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
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
Search
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
On/Off

Remark

Non regulation region
Regulation region

PAL MODEL BG/I/DK

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.

1

2

3

4

5

6

Copyright©2010 LG Electronics.Inc. All right reserved.
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 75Ω cable.

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 75Ω cable 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

R

G R B

G R B

G R B

<Fig. 1>

<Fig. 2>

Copyright©2010 LG Electronics.Inc. All right reserved.
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
65dBu
65dBu

Remark

PAL
PAL
PAL

AGC Vol.

2.3±0.05V

2.3±0.05V

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 CH

D, CHE Key to choose adjustment item.

4) Use the VOL

F, VOLG Key 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>

Copyright©2010 LG Electronics.Inc. All right reserved.
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 IN­START key.

3) Press the CH

D, CHE key to select adjustment item.

4) Press the VOL

F, VOLG key 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 Sett­ing 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

AV
LOC KEY
COLOR T

PLL DIV

OPTION 5

FM PRE

NICAM PRE

SCART PRE

A2 FM TH
FIRST TH

ZWT

INITIAL

0
0
1
1
0
0
1
0

0
0
1
0
1
0
0
0

0
1
1
0
0
0
0
0

1
0
1
3
1

31

6
7
0

5
10
12

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

1

SLave ADD

VIDEO ICBAEEPROM

A2

Delay

30

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

C
6
0
0
1

B(R)CUT

9
7
0
0
1

G(B)AMP

E
6
0
0
1

G(B)CUT

B
7
0
0
1

B AMP B CUT G AMP G CUT

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

Menu

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 ~ 255
0 ~ 255
0 ~ 127

0 ~ 15
0 ~ 127

0 ~ 31

0 ~ 31

0 ~ 3
0 ~ 3
0 ~ 3

0 / 1

0 ~ 63

0 ~ 7

0 / 1
0 / 1

0 ~ 15

0 / 1
0 ~ 7
0 ~ 7

0 / 1

0 / 1
0 ~ 3

0 ~63

0 ~ 3

0 ~ 127
0 ~ 127

0 / 1

0 / 1
0 ~ 7

0 / 1
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3

0 / 1

0 / 1

0 / 1
0 ~ 7

0 ~ 15
0 ~ 15
0 ~ 15
0 ~ 15

0 ~ 7

0 / 1

0 ~ 15

0 / 1

Initial setting

40
12

3
110
127
125
127

64

6

64
14
10

7

0

3

0

15

0

0

1

2

0

0

4

0

1

1
112

1

45
64

1

0

4

0

3

0

3

0

1

1

2

1

0

0

7

10

8

28
27

6

0

8

0

Remark

Necessary
Necessary
Necessary
Necessary
Necessary

Unnecessary

Necessary
Necessary

Unnecessary

Necessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary

- 9 -

11. IIC BUS Adjustment Data Table

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 10 -

Menu

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

89
90
91
92
93
94
95
96
97
98

99
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 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3
0 ~ 3

0 / 1
0 / 1
0 / 1
0 / 1
0 / 1
0 / 1
0 / 1

0 / 1
0 ~ 3
0 ~ 3

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 / 1

0 ~ 127

0 ~ 63

0 / 1

0 / 1

0 / 1

0 ~ 15

0 ~ 7
0 ~ 7

0 / 1

0 / 1

0 / 1

0 / 1
0 ~ 3
0 ~ 7
0 ~ 7

0 ~ 15

0 / 1

0 / 1
0 ~ 7
0 ~ 3

0 / 1

0 ~ 15
0 ~ 15
0 ~ 15

0 / 1

0 / 1

0 / 1

0 / 1
0 ~ 7

1 ~ 60

Initial setting

1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0

126

63

0
0
1
8
4
4
0
0
1
0
0
0
3
4
0
0
4
3
0
8
8
3
0
1
0
0
5

38

Remark

Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary
Unnecessary

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 11 -

1. TV FUNCTIONAL

2. TU / IF SECTION

3. VIDEO PROCESSING

TROUBLE SHOOTING

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 12 -

4. SMPS PRIMARY SECTION

5. SMPS SECONDARY SECTION

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 13 -

6. VERTICAL SECTION

7. HORIZONTAL SECTION

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

8. SOUND PROCESSING SECTION

- 14 -

9. CPT DRIVE SECTION

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 15 -

BLOCK DIAGRAM

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 16 -

MAIN

PRINTED CIRCUIT BOARD

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 17 -

MEMO

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

- 18 -

EXPLODED VIEW

174

112

913

170

150

153

520

105

120

330

320

310

300

400

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

Copyright©2010 LG Electronics.Inc. All right reserved.
Only for training and service purposes.

LGE Internal Use Only

P/N: 3854VA0196C

Copyright©2010 LG Electronics.Inc. All right r
Only for training and service purposes.

eserved.

LGE Inter nal Use Only

SVC. SHEET : 3854VA0196C-S