service manuals lg tv lcd rt20la33 rt-20la33 service manual

LCD TVSERVICE MANUAL

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

CHASSIS : ML-024B

MODEL : RT/RZ-20LA33

website:http://biz.LGservice.come-mail:http://www.LGEservice.com/techsup.html

Nov.,2003Printed in KoreaP/NO : 3828VD0168L

- 2 -

CONTENTS

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

PRODUCT SAFETY ..................................................................................3

DESCRIPTION OF CONTROLS .............................................................. 4

SPECIFICATION ........................................................................................7

ADJUSTMENT INSTRUCTION .................................................................9

TROUBLE SHOOTING ............................................................................15

BLOCK DIAGRAM...................................................................................16

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

EXPLODED VIEW PARTS LIST..............................................................19

REPLACEMENT PARTS LIST ............................................................... 20

SVC. SHEET ...............................................................................................

- 3 -

PRODUCT SAFETYIMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audiovisual servicetechnicians. When servicing this product, under no circumstances should theoriginal design be modified or altered without permission from LG ElectronicsInc. All components should be replaced only with types identical to those in theoriginal circuit and their physical location, wiring, and lead dress must conformto original layout upon completion of repairs. If any fuse (or Fusible Resistor) inthis TV receiver is blown, replace it only with the factory specified fuse type andrating. When replacing a high wattage resistor (Oxide Metal Film Resistor, over1W), keep the resistor 10mm away from PCB. Always keep wires away fromhigh voltage or high temperature parts.

Special components are also used to prevent shock and fire hazard.These components are indicated by the letter “x” included in their componentdesignators and are required to maintain safe performance. No deviations areallowed without prior approval by LG Electronis Inc. Service work should beperformed only after you are thoroughly familiar with these safety checks andservicing guidelines.

Circuit diagrams may occasionally differ from the actual circuit used.This way, implementation of the latest safety and performance improvementchanges into the set is not delayed until the new service literature is printed.

CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturer’sapproval.Unauthorized modifications will not only void the warranty, but maylead to property damage or user injury.

GENERAL GUIDANCEAn lsolation Transformer should always be used during the servicingof a receiver whose chassis is not isolated from the AC power line. Use atransformer of adequate power rating to protect against personal injury fromelectrical shocks. It will also protect the receiver and its components from beingdamaged by accidental shorts of the circuitry that may be inadvertentlyintroduced during the service operation.

Before returning the receiver to the customer, always perform an AC leakagecurrent check on the exposed metallic parts of the cabinet, such as antennas,terminals, etc., to be sure the set is safe to operatewithout damage of electrical shock.

LEAKAGE CURRENT COLD CHECK(ANTENNA COLD CHECK)With the instrument’s AC plug removed from AC source, connect an electricaljumper 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 touchother ohm-meter lead in turn to each exposed metallic parts such as antennaterminals, phone jacks, etc. If the exposed metallic part has a return path to thechassis, the measured resistance should be between 1MΩ and 5.2MΩ. Whenthe exposed metal has no return path to the chassis the reading must beinfinite. Any other abnormality that exists must be corrected beforethe receiver is returned to the customer.

ELECTROSTATICALLY SENSITIVE DEVICESSome semiconductor (solid-state) devices can be damaged easily by staticelectricity. Such components commonly are called Electrostatically Sensitive(ES) Devices. Examples of typical ES devices are integrated circuits and somefield-effect transistors and semiconductor “chip” components. The followingtechniques should be used to help reduce the incidence of component damagecaused by static electricity.

1. Immediately before handling any semiconductor component orsemiconductor-equipped assembly, drain off any electrostatic charge on thebody by touching a known earth ground. Alternatively, obtain and wear acommercially available discharging wrist strap device, which should beremoved for potential shock reasons prior to applying power to the unit undertest.

2. After removing an electrical assembly equipped with ES devices, place theassembly on a conductive surface such as an ESD mat, to preventelectrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.4. Use only an anti-static solder removal device. Some solder removal devices

not classified as “anti-static” can generate electrical charges sufficient todamage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical chargesufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package untilimmediately before you are ready to install it. (Most replacement ES devicesare packaged with leads electrically shorted together by conductive foam,aluminum foil, or comparable conductive material.)

7. Immediately before removing the protective material from the leads of areplacement ES device, touch the protective material to the chassis or circuitassembly into which the device will be installed.

Caution: Be sure no power is applied to the chassis or circuit, and observeall other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ESdevices. (Otherwise, seemingly harmless motion, such as the brushingtogether of your clothing or the lifting of your foot from a carpeted floor, cangenerate static electricity sufficient to damage an ES device.)

DESCRIPTION OF CONTROLS

- 4 -

0

2 31

5 64

8 97

POWER

MENU TV/AV

SLEEP

LIST

TEXT MIX INDEX

TIME REVEAL

SIZE HOLD UPDATE

I/II PSM

Q.VIEW

PR

OK VOL VOL

PR

MUTE

MODE

M

i

All the functions can be controlled with the remote control handset.Some functions can also be adjusted with the buttons on the sidepanel of the set.

Remote control handset

Before you use the remote control handset, please install the bat-teries. See the next page.

1. POWER switches the set on from standby or off to standby.

2. NUMBER BUTTONSswitches the set on from standby or directly select a number.

3. MENUselects a menu.

4. D / E (Programme Up/Down)selects a programme or a menu item.switches the set on from standby.F / G (Volume Up/Down)adjusts the volume.adjusts menu settings.OKaccepts your selection or displays the current mode.

5. Q.VIEWreturns to the previously viewed programme. selects a favourite programme.

6. I/IIselects the language during dual language broadcast.selects the sound output (option).

7. PSM (Picture Status Memory)recalls your preferred picture setting.

1

2

3

4

5

6

7

8

12

10

11

9

(With TELETEXT)

- 5 -

8. MUTE switches the sound on or off.

9. TV/AVselects TV or AV monitor mode.clears the menu from the screen.switches the set on from standby.

10. SLEEPsets the sleep timer.

11. LIST displays the programme table.

12. TELETEXT BUTTONS (option)These buttons are used for teletext.For further details, see the ‘Teletext’ section.

COLOURED BUTTONS : These buttons are used for teletext (onlyTELETEXT models) or programme edit.

0

2 31

5 64

8 97

POWER

MENU TV/AV

SLEEP

LIST

I/II PSM

Q.VIEW

PR

OK VOL VOL

PR

MUTE

1

2

3

4

5

6

7

8

10

11

9

(Without TELETEXT)

- 6 -

1. POWER (ON/OFF)switches the set on from standby or off tostandby.

2. TV/AVselects TV or AV monitor mode.clears the menu from the screen.switches the set on from standby.

3. MENUselects a menu.

4. OKaccepts your selection or displays the currentmode.

5. FF / GG (Volume Up/Down)adjusts the volume.adjusts menu settings.

6. DD / EE (Programme Up/Down)selects a programme or a menu item.switches the set on from standby.

7. POWER/STANDBY INDICATOR (rr)illuminates red in standby mode.illuminates green when the set is switched on.

8. REMOTE CONTROL SENSOR

9. HEADPHONE SOCKET Connect the headphone plug to this socket.

10. AUDIO/VIDEO IN SOCKETS (AV)Connect the audio/video out sockets of exter-nal equipment to these sockets.

S-VIDEO/AUDIO IN SOCKETS (SAV) Connect the video out socket of an S-VIDEOVCR to the S-VIDEO socket. Connects the audio out sockets of the S-VIDEO VCR to the audio sockets as in AV.

6

Side panel

PR

VO

LO

KM

EN

UT

V/A

VO

N/O

FF

5

432

1

78

Back panel

S-VIDEO VIDEO MONO AUDIO L R H/P

AV

9 10

- 7 -

1. Application rangeThis specification is applied to ML-024B chassis.

2. Requirement for TestTesting for standard of each part must be followed in belowcondition.

(1) Temperature: 25°C ± 5°C(But, CST must be tested 40°C ±2°C (Humidity: 50%))

(2) Humidity: 65% ± 10%(3) Power: Standard input voltage (AC 100-220V, 50/60Hz)(4) Measurement must be performed after heat-run more than

15min.(5) Adjusting standard for this chassis is followed a special

standard.

3. Test and Inspection method(1) Capacity: Follow LG electronics TV Testing Standard.(2) Another Required Standard

Follow the standard of each nation.

SPECIFICATIONNOTE : Specifications and others are subject to change without notice for improvement.

4.General Specification

1

2

3

4

5

6

7

8

9

10

Receivable broadcasting system

RF input channel

Input voltage

Tuning system

Screen size

Aspet ratio

Operating temperature

Operating humidity

Storage temperature

Storage humidity

Specification

Min Typ Max Unit

1)PAL/SECAM-BG

2)PAL/SECAM-DK

3)PAL-I/I

4)SECAM-L/L’

5)NTSC -M

6)NTSC 4.43(AV)

7)PAL N/M

8)NTSC-M

VHF: E02 ~ E12

UHF : E21 ~ E69

CATV : S01 ~ S20

HYPER : S21 ~ S41

L/L’ : B,C,D

VHF : 2 ~13

UHF : 14 ~ 69

CATV : 1 ~ 125

VHF low : 1 ~ M10

VHF high : 4 ~ S22

UHF : S23 ~ 62

AC 100 - 220V ± 10%, 50/60Hz

FVS 100 program

FS

509mm(024B)/330.2(024C)

4:3

0 40 deg

20 80 %

-20 50 deg

30 90 %

Item RemarkNo.

EU/Non-EU

(PAL Market)

NTSC Market

PAL

FRANCE

NTSC

JAPAN

PAL, 200PR.(option)

NTSC

- 8 -

5. Feature and Function

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Teletext

REMOCON

Component input( D terminal - For JAPAN)

Scart

AV input

S-viedo input

Video out

H/P output

2 Carrier Stereo

NICAM Stereo

2 Carrier Dual

NICAM Dual

Local Key

Sub Power Key

AVL

On/Off Timer

APC

DASP

Specification

Min Typ Max Unit

TOP,FLOF,LIST 10 page

RC-5 & NEC code (PAL), NEC code(NTSC)

1 Y,PB,PR

1 Rear (Full Scart)

1 Rear

1 Rear

1 Rear

1 Rear

BG,DK

BG,I,LL’

BG,DK

BG,I,LL’

TV/Video, menu, enter(OK), Vol(F,G), Channel(D,E)

O

O

O

O

O

Item RemarkNo.

TOP(option)

Option,Non-EU,NTSC

Option, EU

024B Only

PAL : PSM

PAL : SSM

- 9 -

1. Application ObjectThis instruction is for the application to the LCD TV.

2. Notes

(1) This set uses an adapter, so connect the adapter and theset correctly before adjustment.

(2) The adjustment must be performed under the correctsequence.

(3) The adjustment must be performed in the circumstance of25!5cC of temperature and 65!10% of relative humidity ifthere is no specific designation.

(4) The set must be operated for 15 minutes preliminarilybefore adjustment if there is no specific designation.

[ ‘Heat Run’ must be performed with the full white signal or TVnoise signal in the internal part of the set.

[ The time for ‘Heat Run’ can be changed owing to productionplan.

[ Line Test condition (TV): standard color signal 65!1dBuV

3. Y.Pb.Pr LEVEL AdjustmentOnly ML-024B

3-1. Required T est Equipment(1) 802F(QUANTUM DATA: Video Test Generator)(2) Remote control for adjustment

3-2. Preparation for Adjustment(1) Adjustment Pattern: R/G/B Color Bar Adjustment Pattern

(Refer to Fig. 1)

3-3. Adjustment(1) Set with Component mode paragraph exchange.(2) Setting the signal Format of signal equipment is to be

480P.(3) Input the Component Jack of the Set with DTV output

(Y.Pb.Pr) of adjustment equipment.(4) With lower part Fig. 1 the same Pattern does to come out

in the Set.(5) Enter the adjustment mode using IN-START Key of Adjust

Remocon.(6) Enter the Component adjustment mode with Fig. 1.(7) From R Color Bar adjustment Pattern value of the DVDRO

using Vol Key of Adjust Remocon adjust disappear APattern of Fig. 1. (When reduces the Data value, Pattern ofthe A comes to dawn)

(8) When the adjustment of the DVDRO is completed, inputadjustment Pattern in G --> B order and adjust DVDGO -->DVDBO and adjust the Pattern of the A not to be visible.

(9) When the adjustment is completed in DVDRO --> DVDGO--> DVDBO order, adjust adjustment data of the DVDRO tobe -3 Step and memory adjustment data using ENTER ofAdjust Remocon.

(10) After adjustment is completed, exit the adjustment modeusing EXIT Key of Adjust Remocon.

ADJUSTMENT INSTRUCTION

(Fig. 1)

- 10 -

OPTION Data

200PR TEXT I/II SV TOP A2 ST SYS

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

SCART

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

OPTION Data


43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

SCART

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

4. Option 1 data setting (200PR ~ A2 ST :1bit, SYS:2bit composition)

- 11 -

OPTION Data


86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

SCART

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

OPTION Data


132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

SCART

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

- 12 -

OPTION Data


178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

01

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

SCART

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

OPTION Data


224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

0

1

2

3

SCART

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

- 13 -

5. Option2 data(ACMS~BBACK:1bit,LANG:3bit)

OPTION Data

ACMS VOL BBACK LANG

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

OPTION Data

ACMS VOL BBACK LANG

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

- 14 -

6. Option3 data(IIC AFT~CH+AU:1bit)

OPTION Data

HiDEV TSS IIC T MONO CH+AUS

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

- 15 -

1 No sound Defective Reset IC of IC604. 1) Check volume and speaker.- Speaker Defective MSP3410G of IC601. - Sound comes out only when being inputted into Audio - Earphone Defective B+(8V) of IC604. L/R.

2) Check after replacing IC603.3) Replace IC601.4) Check and replace B+ of IC604.

2 Video color beat noise Earphone shield case being touched. Check the mould of shield and SJ209, Replace shield case.

Soldering IC501. 1) Check signal of Video input.2) Check signal of R.G.B output.3) Re-soldering

1 No screen Input error of inverter connector 1) Bend the pin legs of P802B connector -> recheck them2) Check and repair IC805 SI4925.

P1 and Pin 50 connector 1) Check and fix P1 connectorbeing slipped out

Cracked components and 1)Check and repair tuner board and main boardsoldering at tuner board 2)Solder Q403

2 Dark screen 1) Defective LCD lamp 1) Replace the inverter2) Defective inverter 2) Replace the LCD lamp3) Input error of inverter connector 3) Check the connector input.

TROUBLE SHOOTING

1. General Features

No. Symptom Cause Check Point

Check Point

2. TV and external inputNo. Symptom Cause

BLOCK DIAGRAM

- 16 -

ML-

024B

CH

AS

SIS

BLO

CK

DIA

GR

AM

PO

WE

R(S

MP

S)

INV

EE

RT

ER

Ass

ay

TU

NE

RT

UN

ER

AN

T (

RF

) In

put

DV

D/D

TV

Inpu

t(4

80I/4

80P

)R

/G/B

/FB

L/

R in

T

V L

/R o

ut

CV

BS

in

ID-1

IC50

1S

CA

LER

(For

mat

Con

vert

er)

LG88

01

IC70

1A

D C

onve

rter

AD

9883

RF

V.

AF

T

SIF

AU

DIO

SW

2

SW

1

B+

IF-0

UT

AD

C

33V

SD

A

SC

L

CT

R

AG

C

SC

L/S

DA

SC

L/S

DA

MS

P-34

XX

SIF

: 2,

SC

AR

T :

4M

ON

O :

1I2

S :

2--

----

18.4

32M

Hz-

--L-

SP

K /

WO

OF

ER

H/P

, I2S

SC

AR

T O

UT

: 2

IC60

2LA

4282

8.0V

8.0V

15V

15V

5.0V

5.0V

RE

SE

T 4

.2V

EE

PR

OM

EE

PR

OM

IC10

0 M

ICO

M /

TX

T6.

0MH

z

SC

L1/S

DA

1

IC50

2O

SD

DC

In

33V

15V

S-T

5V

/5V

S-T

5V

/3.3

V

INV

-On/

Off

(FR

OM

MIC

OM

)

3.3V

3.3V

R/Y

(8)

G

/U(8

)

B/V

(8)

Y/U

/V

R(8

)

G

(8)

B

(8)

R(8

)

G

(8)

B

(8)

RF

V.

YU

V

A/V

V.

S-Y

/C

SC

AR

T V

.

ST-

BY

3.3V

/2.5

V

5.0V

5.0V

R/G

/B/F

B

SC

L/S

DA

CV

BS

(Fro

m IC

352)

PO

WE

RD

C-D

C C

onve

rter

IC60

1M

ULT

ISTA

ND

AR

DS

OU

ND

PR

OC

ES

SO

R

SC

L/S

DA

SIF A/V

L,R

DV

D L

/R

S.

L/R

S.

L/R

H/P

L,R

H/V

Syn

cE

nabl

e,C

LK

TO

MO

DU

LE(5

0P)

TO

MO

DU

LE(5

0P)

5V5V

15V

6-LA

MP

OU

T(7

mA

/EA

)

SC

AR

T R

/G/B

/FB

SC

AR

T V

.

CA

P./T

XT

(R/G

/B/F

B)

15V

(DC

)

RF

V.

S.

L/R

(In/

Out

)

... .H

/P

S-I

nput

V

IDE

O In

put

VID

EO

Out

put

... .H

/P

S-I

nput

V

IDE

O In

put

VID

EO

Out

put

H/P

L,R

A/V

V.

S-V.

A/V

L,R

AU

DIO

MO

NO

INV

ER

TE

RM

SP

34**

TU

NE

R

MIC

OM

, TU

NE

R

LG88

01, M

OD

ULE

,A

D98

83,M

ICO

M

NT

SC

/PA

L/S

EC

AM

Dec

oder

with

Ana

log

YP

bPr/R

GB

Inpu

t and

Dig

ital

YC

bCr/

Dig

ital

RG

B In

put

==

==

==

==

==

==

==

==

==

==

==

==

==

==

==

=

IC35

2V

ideo

S/W

CX

A20

40

Vid

eo

3W 3W

V. O

UT

A/V

L,R

OU

T

CV

BS

(To

Mic

om)

CV

BS

(To

MJ2

01)

MJ2

01

DV

D(A

udio

)

H/V

DV

D L

/R

MEMO

- 17 -

- 18 -

EXPLODED VIEW

500

112

420

410

120

560 33

030

0

340

530

310

11240

0

430

500

540

- 19 -

112 6306V20002A LCD MODULE,V201V1-T01 VGA CHIMEI TFT COLOR

120 120-D44E SPEAKER,FULLRANGE G705/080701A MOTORJOY 4OHM 3/5W 80DB 70X50MM

300 3091V00A20W CABINET ASSEMBLY RT/RZ-20LA33(SET) NON ML024B .

310 5020V00552G BUTTON,CONTROL PR-20LA30 HF-380 7 KEY METALIC BLUE

330 5020V00553D BUTTON,POWER RP-15LA31 NON 1 KEY SET

340 3091V00A19K CABINET ASSEMBLY,RZ-20LA31 STEREO ML024B .

400 3809V00373G BACK COVER ASSEMBLY,RT-20LA33(407AF) SET NON (CASA)

3809V00373L BACK COVER ASSEMBLY,RT-20LA33(SET,HB) NON HF-380 (LGEGF,ALPHA)

3809V00373M BACK COVER ASSEMBLY,RT-20LA33(SET,LGEMT)NON HF-380

3809V00373P BACK COVER ASSEMBLY,RT-20LA33.AHCLKG NON .(LGEAP)

3809V00373S BACK COVER ASSEMBLY,RZ-20LA33 1SCART 3850VC0002F(LGEAK)

410 4811V00082B BRACKET ASSEMBLY,STAND RT/RZ-20LA33(SET) ML024B .

420 4950V00081B METAL,SUPPORTER SUS HINGE FIXER

430 3550V00202F COVER,REAR AV 20LA33/31 ABS, HF-380 .

450 4950V00159A METAL,MAIN FRAME EGI AU LCD

4950V00159C METAL, FRAME EGI 4850V00013Z/109A(LGEAK)

500 4950V00160A METAL,SHIELD EGI 20LA30

510 6871VSMA74A PWB(PCB) ASSEMBLY,SUB MF-002A CTL ASSY RE/RL/RN-20LA30

520 6871VMMQ95A PWB(PCB) ASSEMBLY,MAIN ML-024B PCB ASSY MAIN

6871VMMR37A PWB(PCB) ASSEMBLY,MAIN ML-024B RZ-20LA33 PCB ASSY MAIN(LGEAK)

530 6871VSMV36A PWB(PCB) ASSEMBLY,SUB POWER ML024B 20INCH POWER ASSY

540 6633VA0003S INVERTER ASSEMBLY 15V NON ECT FRONTEC FIF2066-32A 6633VA0003J

EXPLODED VIEW PARTS LIST

No. PART NO. DESCRIPTION

REPLACEMENT PARTS LIST

LOCA. NO PART NO DESCRIPTION

D601

D602

D802

ZD202

ZD203

ZD204

ZD220

ZD221

ZD222

ZD400

C10

C101

C113

C209

C219

C220

C211

C212

C225

C226

C254

C255

C278

C281

C282

C289

C351

C353

C354

C356

C357

C362

C364

C380

C381

C383

C403

C404

C408

C412

C499

C501

C523

C526

C541

0DD181009AB

0DD181009AB

0DD100009AM

0DZRM00178A

0DZRM00178A

0DZRM00178A

0DZRM00178A

0DZRM00178A

0DZRM00178A

0DZ330009BA

0CE337ZF638

0CE107BF618

0CE107BF618

0CE476DF618

0CE226DF618

0CE226DF618

0CE106DF618

0CE227DD618

0CE106DF618

0CE106DF618

0CE105BK618

0CE105BK618

0CE225DK618

0CE105BK618

0CE105BK618

0CE104DK618

0CE227DF618

0CE475DK618

0CE106DF618

0CE106DF618

0CE106DF618

0CE107DF618

0CE336DF618

0CE105BK618

0CE106DF618

0CE106DF618

0CE476DH618

0CE108DD618

0CE106DK618

0CE105DK618

0CE476DF618

0CE107DF618

0CE104DK618

0CE107DF618

0CE107DF618

DIODE, KDS181 TP KEC - 85V - - - 300MA

DIODE, KDS181 TP KEC - 85V - - - 300MA

DIODE, EU1ZV(1) TP SANKEN

DIODE,R/TP SMD 0.2W 5.1V 5MA -PF






DIODE, ZENER HZT33 TAPING

330UF SEP 16V 20% FM5 TP 5

100UF KME 16V M FL TP5


47UF STD 16V M FL TP5









2.2UF STD 50V 20% FL TP 5



0.1000UF STD 50V M FL TP5











47UF STD 25V 20% FL TP 5






0.1000UF STD 50V M FL TP5




IC101

IC102

IC351

IC352

IC601

IC602

IC603

IC604

IC801

IC905

Q101

Q102

IC2

IC802

IC803

IC804

IC805

Q1

Q100

Q1101

Q1102

Q1103

Q200

Q201

Q202

Q353

Q354

Q402

Q403

Q404

Q405

Q406

Q407

Q502

Q510

Q551

Q560

Q602

Q603

Q604

Q605

Q651

Q801

Q802

Q803

0IAL241610B

0IFA752700A

0IMCRFA010A

0ISO204000A

0IMCRMN011D

0ISA428200A

0IKE704200J

0IMCRFA009A

0ITC786000A

0ISA428200A

0IFA270000A

0IFA270000A

0TF492509AA

0TFVI80001A

0TFVI80001A

0TFVI80005A

0TF492509AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR150400BA

0TR150400BA

0TR150400BA

0TR150400BA

0TR387500AA

0TR387500AA

0TR387500AA

0TR387500AA

0TR150400BA

0TR150400BA

0TR150400BA

0TR387500AA

0TR150400BA

0TR150400BA

0TR150400BA

0TR150400BA

0TR150400BA

0TR387500AA

0TR150400BA

0TR387500AA

IC, AT24C16A-10PI-2.7 8PIN DIP ST

IC, KA75270Z 3 TP RE-SET IC MC-007

IC, KA7809R, FAIRCHILD 2P D-PAK, R/TP

IC, CXA2040AQ 32P,QFP BK IIC BUS

IC, MSP3410G QA B8 V3 80P QFP TRAY

IC, LA4282 12S 2CHX10W AUDIO AMP

IC, KIA7042AF SOT-89 TP 4.2V VOLTAGE

IC, KA78M08RTM, 2P D-PAK, R/TP

IC, SI786 28SSOP TP DUAL-OUTPUT

IC, LA4282 12S 2CHX10W AUDIO AMP

IC, 2N7000TA TO-92, 3P TP 60V/0.2A

IC, 2N7000TA TO-92, 3P TP 60V/0.2A

TR, SI4925DY TP TEMIC 30V 6.1A SO-8

TR, VISHAY SI4808DY R/TP SO-8 30V 7.5A

TR, VISHAY SI4808DY R/TP SO-8 30V 7.5A

TR, VISHAY SI4963DY R/TP SO-8 -20V 6.2A

TR, SI4925DY TP TEMIC 30V 6.1A SO-8

TR, CHIP 2SC3875S(ALY) KEC








TR, CHIP 2SA1504S(ASY) KEC










TR, BIPOLARSCHIP 2SA1504S(ASY) KEC


TR, BIPOLARSCHIP 2SA1504S(ASY) KEC

TR,BIPOLARSCHIP 2SA1504S(ASY) KEC







IC

TRANSISTOR

- 20 -

CAPACITOR

For Capacitor & Resistors, thecharactors at 2nd and 3rd digitin the P/No. means as follows;

CC, CX, CK, CN : CeramicCQ : PolyestorCE : Electrolytic

RD : Carbon FilmRS : Metal Oxide FilmRN : Metal FilmRF : Fusible

DIODE

- 21 -


C541

C564

C573

C578

C581

C601

C602

C605

C613

C614

C616

C617

C620

C621

C624

C625

C626

C627

C629

C633

C643

C646

C647

C647

C647

C648

C649

C651

C652

C654

C655

C655

C711

C713

C800

C801

C808

C814

C815

C817

C820

C834

C835

L174

L175

L176

L177

L203

L208

L209

0CE227DF618

0CE476DH618

0CE476DH618

0CE476DH618

0CE107DF618

0CE477BF618

0CE477BF618

0CE107BF618

0CE106DF618

0CE106DF618

0CE107DF618

0CE107BH618

0CE335DK618

0CE107BF618

0CK224DF56A

0CK224DF56A

0CK224DF56A

0CK224DF56A

0CE107DF618

0CE107DF618

0CE476BF618

0CE225DK618

0CE225DK618

0CE225BK618

0CE225DK618

0CQ1031N509

0CQ1031N509

0CE107BH618

0CE107BF618

0CE476BK618

0CE477BH618

0CE477DH618

0CK823DK56A

0CE107DF618

0CE337ZF638

0CE476BK618

0CE227DH618

0CE107DH618

0CE107DH618

0CE475DK618

0CE227DH618

0CE477BH618

0CE477BH618

0LC0233002A

0LC0233002A

0LC0233002A

0LC0233002A

0LC0233002A

0LC0233002A

0LC0233002A















220000PF 2012 16V 10% R/TP X7R

220000PF 2012 16V 10% R/TP X7R

220000PF 2012 16V 10% R/TP X7R

220000PF 2012 16V 10% R/TP X7R



47UF KME TYPE 16V 20% FL TP 5



2.2UF KME TYPE 50V 20% FL TP 5


0.01U 100V K POLY TP

0.01U 100V K POLY TP






82000PF 2012 50V 10% R/TP X7R


330UF SEP 16V 20% FM5 TP 5









INDUCTOR,CHIP3.3UH R/TP





INDUCTOR,CHIP 3.3UH CERATECH R/TP

INDUCTOR,CHIP 3.3UH CERATECH R/TP


L401

L551

L552

L553

L554

L555

L556

L803

P100

P1101

P1102

L502

L503

L504

L505

L506

L507

L516

L518

R200

R201

SW1101

SW1101

SW1102

SW1103

SW1104

SW1105

SW1106

SW1107

DJ201

DJ202

MJ201

PJ202

RJ201

SC204

SC204A

L101

L106

L107

L1101

L111

L112

0LA0272K139

0LC1020101A

0LC1020101A

0LC1020101A

0LC1020101A

0LC1020101A

0LC1020101A

6140VB0004A

366-932E

6631V20014D

387-A07A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RRZVTA001A

0RD1000H609

0RD1000H609

140-275B

140-313A

140-313A

140-313A

140-313A

140-313A

140-313A

140-313A

380-336F

380-336E

6613V00004P

6612VAH001C

6613V00008F

381-091B

6612VJH008D

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001A

6200JB8010L

6200JB8010L

INDUCTOR,AXIAL LEAD27UH K 4X10.5 TP

INDUCTOR,CHIP 1UH 10% 2012 R/TC






COIL,CHOKE 9.5UH 1UEWPHY 13.5TURN

CONNECTOR (CIRC),WAFER2.5MM 6P

CONNECTOR ASSY,12P 2.0MM 250MM AWG26

CONNECTOR ASSY,7P 2.5MM 100MM AWG 26

100 OHM 5% CHIP 100 OHM*4








100 OHM 1/2 W 5.00% TA52

100 OHM 1/2 W 5.00% TA52

SWITCH,PUSH 30V 0.3A 500G

SWITCH, TACT 2LEAD 100G(TA) 5V 0.001A







JACK,RCA WA6013E RCA RED 1P GOLD

JACK,RCA WA6013E RCA 1P WH GOLD

JACK ASSY,PJ6054P RCA 3P GOLD

JACK,PHONE DC-003 UNITOP 4PIN

JACK ASSY,PMJ014F E/P(ST)+S-VHS+3P H6.5

JACK,SCARTS-091B UGCOM SCART 21 PIN W/O

JACK,RCA PJ6063D DVD IN 3P GN-BL-RD

FILTER,EMC 3216MM R/TP



FILTER,EMC 2012MM CHIP-BEAD

FILTER,EMC 1000OHM 350MA


For Capacitor & Resistors, thecharactors at 2nd and 3rd digitin the P/No. means as follows;

CC, CX, CK, CN : CeramicCQ : PolyestorCE : Electrolytic

RD : Carbon FilmRS : Metal Oxide FilmRN : Metal FilmRF : Fusible

SWITCH

FILTER & CRYSTAL

JACK

RESISTOR

CONNECTOR

COIL & INDUCTOR

- 22 -


L113

L114

L115

L116

L117

L118

L119

L119

L200

L201

L202

L204

L205

L206

L207

L213

L214

L296

L297

L351

L400

L402

L501

L515

L517

L580

L600

L602

L603

L701

L702

L703

L800

L801

L804

L805

L806

L807

L808

L99

R1108

R1109

R1110

R1111

R1112

R226

R228

R229

R230

R231

R505

Z100

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6210TCE001A

6210TCE001A

6210TCE001A

6210TCE001A

6210TCE001A

6210TCE001A

6210TCE001G

6200JB8010L

6210TCE001G

6210TCE001G

6200JB8010L

6200JB8010L

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001A

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6210TCE001G

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6200JB8010L

6210TCE001A

156-A01L















FILTER,EMC R/TP 1000OHM 350MA





































RESONATOR,CRYSTAL 6.000MHZ 30PPM 16PF BK


Z500

Z600

A1

A1

A1

A1

A1

A1

A2

A2

A3

A3

A3

A4

LED1

PA1101

T801

TU401

TU401

156-A02X

156-A02M

3828VA0409S

3828VA0445A

3828VA0445C

3828VA0445D

3828VA0445F

3828VA0445R

6710V00082W

6710V00082X

6410VBH003A

6410VEH003A

6410VSH001A

6634B00043J

0DL200000CA

6726VV0006D

6170VTCA30A

6700MF0003A

6700PF0002A



MANUAL,OWNERS AK LG 082W TX

MANUAL,OWNERS NEU LG EN 082W TX

MANUAL,OWNERS MT LG EN 082W TX

MANUAL,OWNERS AP LG EN 082W TX

MANUAL,OWNERS NEU LG AR/EN 082W

MANUAL,OWNERS NEU LG CH/EN 082X

REMOTE CONTROLLER,NEC CODE

REMOTE CONTROLLER, W/O TXT 25NON

POWER CORD, MP5004 VOLEX BSI 1800MM

POWER CORD, M2511A-001 VOLEX VDE 1800MM

POWER CORD,M3203 VOLEX SAA 1800MM

ADAPTER,AC-DC SAD7015SE 15V 4.5A

LED,SAM5670(DL-2LRG) BK Y-GREEN -

REMOTE CONTROLLER RECEIVER,38.0KHZ

TRANSFORMER,SMPS[COIL]EPC 320UH DC-DC

TUNER,TAFH-Z342D LG MULTI FS

TUNER,TAFH-S321D LG FS 4SYS

ACCESSORIES

MISCELLANEOUS

SC204A DVD JACK

P/NO:3854VA0126A-S1(1/2)

2003.08.28

MAIN(TOP)

MAIN(BOTTOM)

CONTROL BOARD

POWER S/W

P/NO:3854VA0126A-S1(2/2)

2003.08.28

SVC. SHEET : 3854VA0126A-S1

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