LG 29FU6RSD User Manual

COLOR TV

SERVICE MANUAL

CAUTION

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

CHASSIS : CW62D

MODEL : 29FU6RSD/RS

MODEL : 29FU6RSD/RS-T5

North/ Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com

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

Sep, 2008

Printed in ChinaP/NO : MFL42090903

Internal Use Only

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CONTENTS

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

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

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

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

Trouble Shooting.................................................................................................13

Printed circuit board.........................................................................................17

Block Diagram ......................................................................................................19

Exploded View....................................................................................................20

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

LGE Internal Use Only

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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

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SPECIFICATIONS

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

V Scope

This specification is for CW62D CHASSIS Color TV.

V Test and Inspection Method

1) Capability: It follows the TV QC Standard of LGE.

2) Standards of Etc. requirement

- Safety: IEC60065

-EMC : CE standard(EN55020,EN55013)

V Test Condition

Conduct the test as mentioned below.

2.1 Temperature : 25 ± 5°C ( CST 40±5°C)

2.2 Relative Humidity : 65

± 10%

2.3 Power Voltage :

2.4 Follow each drawing or spec for spec and performance of parts, based upon P/N of B.O.M.

2.5 Warm up TV set for more than 20min. before the measurement (If no problem in capability,this allow omitted)

5 6

Item

Receiving System

Receiving Channel

Input Voltage

Market

Picture inch Tuning System

Operating Environment

Storage Environment

Remark Korea,Japan,Taiwan,North America,Middle South American EU /Non EU MODEL

OPTION

Korea,Taiwan,North America. Middle south American

Japan

1)EU/Non EU Model

2)NTSC-M (Multi-model NTSC-M)

Korea Middle south America North America Japan Taiwan NON-EU EU

NTSC MODEL

PAL MODEL 200 PR(W/O TXT )

Specification

1) NTSC M

2) NTSC M/ PAL M/N

1) PAL,SECAM BG

2) PAL/SECAM DK

3) PAL-I/I

4) NTSC M

5) NTSC 4.43(AV)

6) SECAM L/L

7) NTSC M/PAL M/N

1) VHF : 02~13 UHF : 14~69 CATV : 02~125

2) VHF/UHF : 1~62CH

CATV : C13~C38CH TOTAL 88CH

3) VHF : E2 ~ E12

UHF : E21 ~ E69

CATV : S1 ~ S20

HYPER : S21 ~ S41

4) VHF : 02 ~ 13 UHF : 14 ~69 CATV : 02 ~ 71

AC 220V, 60Hz AC 100 ~ 240V, 50/60Hz AC 120V, 60Hz AC 100V, 50/60Hz AC 110V, 60Hz AC 110 ~ 240 V/50Hz, 60Hz AC 230 V 50/60 Hz Korea, Japan, Taiwan, North America. Middle South American ,Filipine, China, Middle Asia, Asia, EU, CIS FLAT 29” FS FVS 100 program

1)Temp : 0 ~ 45 deg

2)Humidity : under 85 %

1)Temp : -20 ~ 60 deg

2)Humidity : under 85 %

V General Specification

Market Place

Miesast/Africa

EU/CIS

Band

LG LG

Standard input Voltage

110 ~240 Vac, 50/60Hz

230Vac 50Hz

Remark

Initial

LGE Internal Use Only

1. Application Object

This specification can be applied to all the television related to CW62D 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)All adjustments must be done in correct sequence.

However, for better productivity, it can be changed in a prepermitted range.

(3) Environment conditions: If not specified, it must be done in

following conditions.

1) Temperature: 25±5°C

2) Humidity : 65±10% (4)Adjust receiver's AC power follow the rated voltage. (5) If not specified, the receiver must be operated for more

than 15 minutes prior to the adjustment.But adust on the

board, can adjust under the JIG state instantly.

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

LG standard signal means the digital pattern PAL_EU 05CH

3. Adjust Item

3.1.1. Preparation for Adjustment.

Input Cross-Hatch Pattern [fig.1],Set video mode

“DYNAMIC(CLEAR)”

3.1.2. Adjustment.1

Adjust FOCUS VOLUME(the top volume of FBT)

¨and make the FOCUS of vertical line on the quarter of screen(red area in fig.1) achieve the best state.

3.2. Purity and Convergence adjustment

Following direction is a case using of None-ITC CPT for CPT manufacture factory. This adjustment should be done as below direction.

3.2.1. Purity adjustment

a. Do degauss CPT and Cabinet b. Receive Red Raster signal. c. Unfasten fixing Screw of DY, close DY to CPT Funnel DY

as possible as you can.

d. Make R-Land be centered as cross Purity Magnet

That time,4th 6th magnet should keep free gauss status.

e. Make uniform RED Raster as moving DY,

Check there is purity problem or not on R/G/B, white

Raster.Then, Fix screw of DY.

(At this time, be careful about inclination and DY should be

fixed keeping horizontality)

f. Check the TV in direction of EAST, WEST, SOUTH,

NORTH,. Adjust with supporting MAGNET when adjustment is not operated ..

3.2.2. Adjustment for Convergence

This adjustment should be operated at the best condition of

FOCUS after finishing the PURITY adjustment.

1) BACK RASTER receives black CROSS HATCH signal.

2) Adjust Brightness so that there are 9-12 dots.

3) Widen two tabs of 4pole Magnet with equal angles and accord red, blue vertical lines at the center of screen.

4) With keeping angle of "c. clause", rotate tab and accord red/blue, green vertical lines at the center of screen.

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ADJUSTMENT INSTRUCTIONS

<Fig 1. Cross-Hatch Pattern(PAL:E-7 CH)

Integrate DY and Magnet into CPT

CPT Assembly

As preparatory operations before assembling CPT, wind cotton Tape for protecting to CPT NECK and DY, CPT connection parts. At this moment, end of tape should be over-lapped and wound in direct route to the NECK.

It needs minimum 15 minutes for heat run under "standard" picture condition.

DY FIXED Torque 9~11 kg f.cm

Fix the Magnet to the position as shown picture below. Be careful not to make CPT neck shadow while adjusting DY.

HEAT RUN

Degaussing

STC Pre-Adjustment

Purity adjustment

DY Fixing

SCREEN Voltage adj.

W/B Fix

FOCUS adjustment

STC adujustment

DYC adujustment

Fig.2 Adjustment Sequence

LGE Internal Use Only

Convergence Magnet

15 ~ 20mm

6Pole

5) Widen two tabs of 6pole Magnet with equal angles and accord red, blue vertical lines at the center of screen.

6) With keeping angle of "e. clause", repeat the adjustment from c to e keeping in mind the movement of red, blue, green when the horizontal lines are twisted.

7) Move DY up, down, left, right and make the convergence to be optimal condition and stick rubber wedge to CPT so that the DY not to move.

8) Ordinate R,G,B adjust,process must follow the R,G,B sequence.

When adjust not follow the R,G,B sequence,picture

circumjacent Miss-Convergence will NG.

3.3 SCREEN & WHITE BALANCE Adjusting

3.3.1. Manual Adjustment Method (use remoncon for adjusting)

1) On RF Mode,input PAL or SECAM(NTSC)signal,and receive (it is independent of CH)

2) Under LINE SVE MODE (IN-START KEY),Press ADJ KEY can switch to SCREEN adjust MODE.

3) Adjust FBT's SCREEN VOL, Make the TV picture appear a horizon line ,turning FBT SCREEN VOL make the horizon line just disappear is the best position.(When exit SVC MODE press "TV/AV" KEY).

3.3.2. WHITE BALANCE Manual Adjustment.( INSTART ->

SERVICE1)

When auto adjust in [LINE SVC MODE (IN-START

KEY)press MUTE KEY will switch to CPU OFF MODE,the top of picture will display “CPU OFF” state connect to adjust JIG.

1) TV set receive 100% White Pattern signal

2) In the state of default setting,adjust BLO-R(R CUT), BLO-G(G CUT)

3) In default setting Data

BG(B-DRIVE) is 32,adjust RG(R-

DRIVE), GG(G-DRIVE)

Make X,Y coordinate satisfy color coordinate below,adjust

HIGH LIGHT(35FL).

Adjust repeatedly until HIGH LIGHT, LOW LIGHT match.

W/B setting default data refers to W/B TABLE based on

different MODEL.

CW62D WHITE BALANCE IIC PARAMETER

1. IC

2. White balance IIC Parameter (Address)

3.Color coordinate

3.4 Deflection Setting Data Adjustment

When adjust manual as follow

3.4.1. Adjustment Preparation

(1) TV set receive Digital pattern (PAL: E5ch.) (2) Deflection setting data adjustment can be done only with

remote control.

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

continuously to enter Deflection Adjustment mode.

(4) Press the CH

D ,E Key to select adjustment item.

(5) Press the

F ,G Key to change the data.

3.4.2. Adjustment

1.Deflection Setting Data Adjustment,adjust in N50Hz (PAL) mode firstly, USB apply model,PAL Muti : N60Hz(Digital Pattern) need setting Deflection data

Then separately adjust N60Hz(NTSC), Z60Hz, N50Hz, W50Hz,

Z50Hz.(Model with ARC function)

(In N60Hz adjustment, data more than N60Hz can auto transfer

accordingly to N60Hz compensate value, please pay attention to it.)

2. Korea Model adjust only in N60Hz.

3. Middle/south America Model first adjust in N60HZ,then in

N50(PAL-N ).

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LGE Internal Use Only

Item

X Y

Color

Temperature

288 295

9000

degree

268 273

1300

degree

267 276

1300

degree

282

288 10000 degree

266

282 13000 degree

N-EU

KOREA /Taiwan

Middle/South

America

Philippines

<Table 1> WHITE BALANCE Color Coordinate

Item

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

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

LOW

LIGHT

HIGH

LIGHT

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

32 32 32 32 32

PAL

fixed

Range

default setting data

remarks

<Table 2> WHITE BALANCE default setting data

<Table 3>W/B auto adjust machine setting Table

VCD IC

EP_ROM

Name

Maker

NOTE

0 0 0 0

Algorithm

Program Sub Add Start Bit

Stop Bit

Offset

Polarity

EP_Rom_S

B(R)_Amp

Win31_wb TWB

5 0 0 1

B(R)_Cut

Win31_wb TWB

5 0 0 1

G_Amp

Win31_wb TWB

5 0 0 0

Program

Vcd Slave

Win31_wb

TWB

Eeprom_Slave

Win31_wb

TWB

Speed1Delay

G_Cut

Win31_wb TWB

5 0 0 0

Mode

High Light

Low

Light

4. After finishing deflection setting data adjustment, press ENTER KEY,then save it and escape adjustment Mode.

Deflection Setting ITEM

1. V SLOPE

CPT center line aim at black background !

2. V SHIFT (VS)

Keep accord with vertical center line of received picture and

CPT

3. V LINEAR (VL)

Adjust the top & bottom size of inner circle to be equal on PAL

E05 CH.

4. V AMPLIT (V AMPITUDE)

PAL signal: Adjust upper and lower part of circle from the effective

screen of the CPT to be distance of 6~7mm .

5. H SHIFT (HS)

Adjust the vertical center line of a digital circle pattern is in accord with geometric vertical center of the CPT.

6. EW WIDTH (EW)

Adjust outer line of the left/right outer lattice to be united with effective boundary surface of CPT. Adjust(1) of [Fig 4] 0~25% scope on external lattice from PAL

adjustment.

7. EW PARAB (EW 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 (EW TRAPEZOID)

Keep accord with the top and the undersurface horizontal scope.

(When picture distorts,adjust until it is the square.)

9. EW UPCOR & EW LOCORR

Adjust so that corner vertical line of upper-left ,upper-right, lower-

left and lower-right to be optimization.

10. H BOW

Adjust until distortion scope of the edge part in the top and the undersurface of the picture are the same.

11. H PARALL (ANGLE)

In angle adjustment, adjust until inclination of center vertical line

should be vertical precisely.

12. SCORRECT (S CORRECTION)

Adjust so that the lattice scopes of top, center, bottom of received pattern are the same. Use the default setting data (Initial data) of CPT owing to using DY data of CPT.

13. V SCROLL

Keep accord with the geometry vertical center line of received picture and the vertical center of CPT.

14. V ZOOM

VERTICAL ZOOM

15. WBR

16. WBF

3.5 Deflection setting default (SERVICE 2)

- P A L(SERVICE 2)

[Table 4] Deflection setting default based on different model

(SERVICE 2)

- 7 -

[Fig.5] Cross-Hatch Pattern (PAL:E-7 CH)

CRNU

CRNL

CRNU6

CRNL6

Adjusting Point

Actual picture size

[fig.4] PAL Digital Pattern (EU05CH)

LGE Internal Use Only

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