LG 14SA3AB-TL, 14SA3AB-ZL, 14SA3CB-TL, 14SA3CB-ZL, 14SA3RB-TL Service manual & schematics

COLOR TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : CW91B

MODEL : 14SB1RB/AB/CB

MODEL : 14SB1RB/AB/CB-TL/ZL

May., 2009

Printed in ChinaP/NO : MFL61957204

- 2 -

CONTENTS

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

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

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

Adjustment Instructions .................................................................................6

Trouble Shooting .................................................................................................11

Printed circuit board.........................................................................................16

Block Diagram ......................................................................................................18

Exploded View.....................................................................................................19

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

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

LGE Internal Use Only

To Instrument’s exposed METALLIC PARTS

AC Volt-meter

Good Earth Ground such as WATER PIPE, CONDUIT etc.

1.5 Kohm/10W

- 4 -

V Scope

This specification applies to CTV models based on chassis CW91B .

V SPECIFIC

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 minutes heat run.

6) Power Voltage

V Testing 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) 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 ,DK 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 Mideast,Africa,Middle south America

Conventional 14" 4:3 CRT FVS FS

1)Temp : 0 ~ 45 deg

2)Humidity : ~ 85 %

3)Temp : -20 ~ 60 deg

4)Humidity : ~ 85 %

V General 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.

LGE Internal Use Only

Market Place Middle East/Africa/CIS

Compliance Safety : CB(IEC60065) EMC : CE(EN55020,EN55013)

Remarks

No

1 2

3

4 5 6 7

Item REMOCON CAPTION

TELETEXT

AV INPUT Component input Monitor out PERI TV Connector

Remark

NTSC MODEL PAL W/TEXT MODEL RF ST:10page AV/Mono:1page

1

AV Input

Specification

LG Code

1

V Feature and Function (PAL & NTSC)

- 5 -

No

8

9 10 11 12 13 14

15 16 17 18 19 20

21

22

23

24

Item Dual/Stereo 2 Carrier Dual NICAM Stereo 2 Carrier Dual NICAM Dual SSC(Split Screen) Mode Multi Picture Display Mode(1:4:9 PIP) Noise Reduction Progressive Scan Motion Detection DBS(Dynamic Bass System) Swivel Speaker Digital (Magic) eye

Station Auto programme

Storage Skip Delete Swap Sound System Colour System Fine

Picture PSM(PAL)

XD CSM

Time Clock

Off Time On Time Auto sleep On Time Volume

Special Language

Child lock

Input

Remark

OPTION

Around Brightness(option) MAX:PSM(Clear) Min:PSM(Soft)

Contrast Brightness Colour Sharpness

Time setting Off time setting On time setting

Specification

To start 0~99 on/off on/off 0~99 BG/I/DK/M Auto/PAL/PAL 60/NTSC/NTSC443/SECAM

Dynamic Standard Mild Game User On/Off Standard/Redish/Greenish/Bluish

--/--

--/-- on/off

--/-- on/off on/off 30 English Germany Spain Italy DenmarkGreek Finland Sweden Greek Norway Netherlands Portugal Poland Hungary Rumania Chesky CIS URDU PARSI ARAB On/Off TV/AV

V Feature and Function (PAL & NTSC)

1. Scope of Application

These adjustment instructions are applicable to CW91B 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 prepermitted range.

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

1) Temperature: 25±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 07CH PAL/SECAM: LG standard signal means the digital pattern PAL_EU 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 75Ω cable LG standard signal (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

SVCT/X.)

3.2. Purity and Convergence Adjustment

3.2.1. Purity adjustment (1). Adjustment Preparation

a. Received Red Raster Pattern for purity adjustment (11CH). 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 (06ch). d. Let the Contrast in normal luminance level.

(3). Static Convergence (STC) Adjustment

a. Received the Cross Hatch Pattern for Convergence (06ch). 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 puls :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.

- 6 -

ADJUSTMENT INSTRUCTIONS

LGE Internal Use Only

G

R B

G

R B

G

R B

R

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, CHE key to choose adjustment item. (4). Use the VOLF,VOLG Key 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. CW91B WHITE BALANCE IIC PARAMETER (1) White balance IIC Parameter (Address)

(2) Color coordinate

(3) 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,06CH, NTSC: Crosshatch pattern, Ch.10 ) 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 (If necessary to confirm)

This adjustment must be done after the White balance

Adjustment

3.6.1. Adjustment preparation (1).NTSC

-. Received LG standard Mono scope pattern .

-. 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,VOLG KEY 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)

- 7 -

LOW

LIGHT

HIGH

LIGHT

Default setting data

PAL NTSC

Remark

ITEM

EU N-EU PhilippinesTaiwan

Latin

America

288 298

9000

±

800

X Y

Color

Temperature

268 273

13000

±

800

267 276

13000

±

800

268 273

13000

±

800

266 282

13000

±

800

LGE Internal Use Only

US 9CH

[Fig 1] Cross-Hatch Pattern

ITEM

BLO-R(R CUT) BLO-G(G CUT) BLO-B(B CUT)

RG(R DRIVE) GG(G DRIVE) BG(B DRIVE)

Range

0~63 0~63 0~63 0~63 0~63 0~63

32 32 32 32 32 40

Fixed

[figure 2] MONO SCOPE Pattern signal

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

pressing the VOL

F,VOLG KEY 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)

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 . (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,VOLG Key

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,E Key to select adjustment item.

(4) Press the VOLF,G Key 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 AMPLIT (Vertical Amplitude)

Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT.

(4) 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.

(5) SCORRECT (S-CORRECTION)

Adjust so that all distance between each Vertical lines are to be the same. * Pre-settled according to the CPT.

(6) V SCROLL

* Recommend initial setting data

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.

- 8 -

LGE Internal Use Only

Remarks

14"

Ultra Slim

PAL

ITEM

V SLOPE

V SHIFT V LINEAR V AMPLIT

H-SHIFT

SCORRECT

V SCROLL

V ZOOM

WBR WBF

V SYNSLI

Vertical slope Vertical shift Vertical linearity Vertical amplitude Horizontal shift S correction Vertical Scroll Vertical zoom Timing of Wide Blanking Timing of Wide Blanking Vertical slicing level

Description

19 17

22 16 29

7 2 0

Adj. Adj. FIX Adj.

Adj. Recommend Recommend Recommend Recommend Recommend Recommend

14"

Ultra Slim

NTSC

19 16

22 13 29

7 2 0

3.9. SVC Adjustment data table

3.9.1. Picture Setting SVC DATA1 ( SERVICE 1 )

Ultra Slim

ITEM

AGC RG GG BG BLO-R BLO-G BLO-B CDL L-DLY RGB-BRI SUB-BRI SCR-BRI IFS CODS CBS

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 SUB Brightness Screen Brightness IF Sensitivity Sync Lock Coincidence Control Sequence

25 32 32 40 32 32 32 11 10 11

5

43

0 0 0

Description

CPT

PAL NTSC

Remarks

ITEM

FMWS MONO DSG AGN BPB AVLE AMLOW BPB2 FFI DCXO AVL DVD VOL

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 DVD Volume

1

1 1 0

1 0 1

FM Pre-scaler(Stereo L/R)

Description

3.9.2. Picture Setting SVC DATA1 ( SERVICE 3 )

[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)

- 9 -

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 (0,128,0,32) in BOM.

Mark of BOM

The OPTION 1 data is 0, the OPTION 2 data is 128, the

OPTION 3 data is 0, the OPTION 4 data is 32 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 )

.

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 STRATCH DEPTH DYNAMIC SKIN CONTROL CORING (PEAKING) PEAKING CENTER FREQ. & DELAY RATIO PRE & OVER SHOOT RATIO PRE & AFTER SHOOT PEAK WHITE LIMITING IF DEMODULATIOR OFFSET CHROMA SENSITIVITY AUTO MATIC 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 0 2 0 8 8 0 1 9 8

28

0

1 3

Remarks

14"

( 0, 128, 0, 32)

OPTION 1 OPTION 2 OPTION 3 OPTION 4

LEVEL

PART NO.

SPECIFICATION

DESCRIPTION

JOP EXP.

1.

EBT60669903

MAIN, CW91B

CHASSIS ASSY

(0,128,0,32)

3.10.3. OPTION1 Function

REMARK

FUNCTION

OPTION

0 1 2 3 0 1 0 1

CHASSIS

INCH

PIP

CODE

3.10.4. OPTION2 Function

REMARK

FUNCTION

OPTION

0 1 0 1 0 1 0 1

VOL CURV

DUAL

HIDEV

A2STEREO

CODE

3.10.5. OPTION3 Function

REMARK

FUNCTION

OPTION

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

SCART

DVD

SAV

4KEY

EYE

GAME

X-WAVE

DEGAUSS

CODE

RESERVED RESERVED

WITHOUT PIP

WITH PIP

LOW CURVE

HIGH CURVE

WITHOUT DUAL SAVING

WITH DUAL SAVING

FM Normal Demodulation

FM High Deviation Demo

WITHOUT A2 STEREO

WITH A2 STEREO

WITHOUT SCART

WITH SCART

WITHOUT DVD

WITH DVD

WITHOUT SIDE A/V

WITH SIDE A/V

6 KEY 4 KEY

WITHOUT EYE

WITH EYE

WITHOUT GAME Module

WITH GAME Module

WITHOUT X-WAVE

WITH X-WAVE

WITHOUT DEGAUSS

WITH DEGAUSS

- 10 -

LGE Internal Use Only

3.10.6. OPTION4 Function

REMARK

FUNCTION

OPTION

0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7

OSD LANG

TXT LANG

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

STANDARD

OFF OFF

ON

Dynamic

FLAT

OFF OFF OFF OFF

0 OFF OFF

REMARK

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.

ENGLISH

ARABIC

FARSI

ARAB ALL RESERVED RESERVED RESERVED RESERVED

- 11 -

LGE Internal Use Only

1. TV FUNCTIONAL

2. TU / IF SECTION

3. VIDEO PROCESSING

TROUBLE SHOOTING

- 12 -

LGE Internal Use Only

4. SMPS PRIMARY SECTION

5. SMPS SECONDARY SECTION

- 13 -

LGE Internal Use Only

6. VERTICAL SECTION

7. HORIZONTAL SECTION

- 14 -

8. SOUND PROCESSING SECTION

9. CPT DRIVE SECTION

- 15 -

LGE Internal Use Only

10. CPT DRIVE SECTION

- 16 -

PRINTED CIRCUIT BOARD

MAIN

LGE Internal Use Only

- 17 -

CPT (OPTION)

LGE Internal Use Only

BLOCK DIAGRAM

- 18 -

LGE Internal Use Only

- 19 -

EXPLODED VIEW

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

943

400

520

510

174

300

120

112

913

150

170

310

330

320

LGE Internal Use Only

2009

P/NO.:3854VA0196G (09.05.18)

SVC. SHEET : 3854VA0196G-S

LG 14SA3AB-TL, 14SA3AB-ZL, 14SA3CB-TL, 14SA3CB-ZL, 14SA3RB-TL Service manual & schematics

Specifications and Main Features

Frequently Asked Questions

User Manual