24011249 LG Tips y Correcciones LCD TV OnePoint Guide HOW to REPAIR LCD

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LCD TV One Point DataLCD TV One Point Data

Contents

- Model Classification

- History by Model

GoldIran QA Group

GoldIran

M. B. [email protected]

GoldIran QA Group

RM-30 32LZ50 Glitter NOISE SVC One-Point

1.Subject :

2.Model :

3.Defect Condition :

4.Cause

Prepared by :Display Division GCS Group CS2 Call 080-647-7777

5.Service

RM-30 32LZ50 Screen Glitter NOISE

Irregular glittering lights on screen

Remove C857 220㎌/16V and replace with 470㎌/16V Capacitor as shown in the picture

PART-NO: 0CE477CF618※ Capacitor polarity check required

RM-30LZ50/32LZ50

Defect Cause: Fine characteristics of C857 Capacitor capacity Glitter noise disappeared by removing 220㎌/16V and changing470㎌/16V Capacitor

Part Spec: 470UF SHL,SD 16V 20% (P/No.: 0CE477CF618)

DD-LCD TV05-1203

GoldIran QA Group

RM-30LZ50/DN-30LZ30(A) SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

RM-30LZ50/DN-30LZ30(A) No Picture with sound

INVERTER VER6.0 :Delete Q8 & Q9 on Inverter PCB (6632L-0048C)

※ MODULE R/NO: 6304FLP122A

RM-30LZ50/DN-30LZ30(A)

DD-LCD TV05-1204

1.Details①Inverter off②Channel up/Down: Normal ③Sound: OK④OSD & Video off⑤Input change: Normal

2. Cancellation condition : DC Off / on & AC Off / on

3. Applied P/No : Application Status by Inverter Version① RM-30LZ50 : ~411KG(6.0V)② DN-30LZ30 : 405KG~411KG(6.0V)③ DN-30LZ30A : ~411KG(6.0V)

No Video(No picture with sound)→ Occurs when DC is On (Occurs as turning on with remote control after being left for hours)

GoldIran QA Group

RM-30 32LZ50 Picture NOISE SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

RM-30 32LZ50 Picture NOISE

Noise at vertical lines as JITTER NOISE

Add capacitors at both ends of IC505

PART-NO: 0CE476CF638

※ Capacitor polarity should be checked

RM-30LZ50/32LZ50

Defect Cause: IC505 5V LINE Ripple NOISE Remove the noise by using 47㎌/16V Capacitor

Part Spec: 47UF 16V 20% 85STD (P/No.: 0CE476CF638)

DD-LCD TV05-1205

GoldIran QA Group

RM-23LZ50 Auto Volume Up SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

RM-23LZ50 Auto Volume Up

RM-23LZ50 Auto Volume Up

- Volume suddenly goes up when power is on

Remove wafer and solder Connector Lead

PART-NO: 6871TST630A※ Lead should remain as it is

RM-23LZ50

Defect Cause: Crack on P1700 soldering by P1700 area bending in wafer because Control board was touched while B/C assembly

Part Spec: 47UF 16V 20% 85STD (P/No.: 0CE476CF638)

DD-LCD TV05-1206

Can be replaced with 6871TST630A

GoldIran QA Group

DN-37LZ30 SVC One-Point

1.Subject :

2.Model Applied :


4.Cause


5.Service

DN37LZ30_Black & White Picture

Analog TV, AV: Picture displays in black and whiteDTV, D-SUB, DVI: Picture displays in normal color

RF (Analog TV), AV Signal have no color (Black & white display)

Replace X301(SC20.25A501) Characteristic Defect

Defect Cause: X301(SC20.25A501) Part characteristics defect

Part Spec: SCO-103 SUNNY 74.25MHZ +/- 50 (P/No.: 6204B47985H)

Defect Picture Normal Picture

DD-LCD TV05-1213

DN-37LZ30

GoldIran QA Group

RM-32LZ50 Picture NOISE SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

RM-32LZ50 No Picture with Sound

INVERTER :Remove R60 on Inverter PCB

※ MODULE R/NO: 6304FLP163A

RM-32LZ50

1.Details①Inverter off②Channel up/Down: Normal ③Sound OK④OSD & Video off⑤Input change: Normal


3. Applied P/No : 411KG~502KG

DD-LCD TV05-1215


GoldIran QA Group

DN-37 42LZ30(A) SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

DTV SOUND LOW

Low Sound for DTV

→ Up Data using Tera Term program① Boot Code change & S/W Up Data

ⓐ Boot Code changeBoot_LCD_UNI(37”/42”)

ⓑS/W UP Data DN-42/37LZ30A Boot Up Data (4.02 → 4.03) Change DN-37LZ30A S/W Version (3.05.2 → 3.07.2)Change DN-42LZ30A S/W Version (3.12.2 → 3.14.2)

→ Replace Digital Board

DN-37 42LZ30(A)

DD-LCD TV05-1216

1.DetailsDTV has low sound output comparing to Analog TV

2.CauseBy adopting Dolby digital sound which is a sound standard for DTV

GoldIran QA Group


1.Subject :

2.Model :


4.Cause


5.Service

Image Saturation (DTV) (Face and hair has black edge and white band)

DN-37 42LZ30(A)

DD-LCD TV05-1217Image Saturation (DTV) (Face & hair has black edge & white band)

→ Replace IC810 V4.03 with V4.04 (0IZZTSZ473A)

→ Replace Digital Board (33139D3010A)

1.Details(Occurs when AI On)

①Inverter On

②When channel up, sound is heard

③OSD & Video off

④Index window (Front display) On

⑤Normal input change

2. Cancellation condition: DC Off / on & AC Off / on

GoldIran QA Group

DN-42LZ30(A) SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

DN-42LZ30(A)

DD-LCD TV05-1218

Image Saturation (DTV) (Face & hair has black edge & white band)

Image Saturation (DTV) (Face and hair has black edge and white band)

1.Details(Occurs when AI On)

①Inverter On

②When channel up, sound is heard

③OSD & Video off

④Index window (Front display) On

⑤Normal input change

2. Cancellation condition: DC Off / on & AC Off / on

→ Replace IC810 V4.04 with V4.05 (0IZZTSZ552A)→ Replace Digital Board

* Check pointAl ASIC and EEPROM communication error occurred by : Replacing R68 10㏀ with 47㏀ to prevent fuse fail,

Changing module operation voltage from 4.5V to 7.5V & Timing shift

GoldIran QA Group

DN-30 37 42LZ30(A) SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

DN-30 37 42LZ30(A) NO VIDEO

→ Replace Digital Board① Connect Jumper wire at IC314 TP POINT

(HD2 Chip Latch up)② Remove R250 and connect to upper part of

R250③ DN-37/42LZ30(A) CPLD UP Data

(4.01 → 4.02)DN-30LZ30(A) CPLD UP Data

(4.02 → 4.03)

DN-30 37 42LZ30(A)

2. Cancellation condition : AC Off / on3. Applied P/No : ① DN-30LZ30A : 411KG~502KG② DN-37LZ30A : 411KG~502KG③ DN-42LZ30A : 411KG~502KG

DD-LCD TV05-1223

No Video(Inverter ON)→ Occurs when DC is On (Occurs as turning on with remote control after being left for hours)

1.Details ① Inverter on② No channel operation/No Sound③ OSD & Video off④ Index window (Front display panel) On/Off⑤ No input change⑥ No remote control operation

GoldIran QA Group


1.Subject :

2.Model :


4.Cause


5.Service

DTV Sound Low

DTV Sound is low



ⓑS/W UP Data DN-42/37LZ30A Boot Up Data (4.02 → 4.03) Change DN-37LZ30A S/W Version (3.05.2 → 3.07.2)Change DN-42LZ30A S/W Version (3.12.2 → 3.14.2)


DN-37 42LZ30(A)

DD-LCD TV05-1224

1.DetailsDTV has low sound output comparing to Analog TV

2.CauseBy adopting Dolby digital sound which is a sound standard for DTV

GoldIran QA Group


1.Subject :

2.Model :


4.Cause


5.Service

DN-37 42LZ30(A) NO VIDEO(Latch up)



ⓑS/W UP Data DN-42/37LZ30A Boot Up Data (4.02 → 4.03) Change DN-37LZ30A S/W Version (3.05.2)Change DN-42LZ30A S/W Version (3.12.2)


DN-37 42LZ30(A)

1.Details①Inverter On②No Channel operation/No Sound③OSD & Video off④Index window (Front display panel) on /off⑤No input change⑥No remote control operation

2. Cancellation condition : AC Off / on

3. Applied P/No : ① DN-37LZ30A : ~505KG② DN-42LZ30A : ~505KG

DD-LCD TV05-1227

No Video (Latch up)(Inverter ON)→ Occurs when DC is On (Occurs as turning on with remote control after being left for hours)

GoldIran QA Group

RM-30LZ50/DN-30LZ30A SVC One-Point

1.Subject :

2.Model :


4.Cause


5.Service

RM-30LZ50/DN-30LZ30A No Picture with Sound

RM-30LZ50/DN-30LZ30A

1.Details①Inverter off②Channel up/Down: Normal ③Sound OK④OSD & Video off⑤Normal input change


3. Applied P/No : ① RM-30LZ50 : 411KG~412(8.1V)② DN-30LZ30A : 411KG~502(8.1V)

INVERTER VER8.1 :Remove R60 on Inverter

PCB (6632L-0048D/E)※ MODULE R/NO: 6304FLP157A

DD-LCD TV05-1230


24011249 LG Tips y Correcciones LCD TV OnePoint Guide HOW to REPAIR LCD

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