LCD TV One-Point Guide (HOW TO REPAIR LCD)

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GoldIran

LCD TV One Point Data

Contents - Model Classification - History by Model

GoldIran QA Group

M. B. Garmaroodi [email protected]

RM-30 32LZ50 Glitter NOISE SVC One-Point DD-LCD TV05-1203 1.Subject :

RM-30 32LZ50 Screen Glitter NOISE

2.Model :

RM-30LZ50/32LZ50

3.Defect Condition : Irregular glittering lights on screen

4.Cause

Defect Cause: Fine characteristics of C857 Capacitor capacity Glitter noise disappeared by removing 220㎌/16V and changing 470㎌/16V Capacitor Part Spec: 470UF SHL,SD 16V 20% (P/No.: 0CE477CF618)

5.Service Remove C857 220㎌/16V and replace with 470㎌/16V Capacitor as shown in the picture PART-NO: 0CE477CF618 ※ Capacitor polarity check required

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

RM-30LZ50/DN-30LZ30(A) SVC One-Point DD-LCD TV05-1204 1.Subject :

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

2.Model :

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

3.Defect Condition :

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

4.Cause

1.Details ①Inverter off ②Channel up/Down: Normal ③Sound: OK ④OSD & Video off ⑤Input change: Normal 2. Cancellation condition : DC Off / on & AC Off / on 3. Applied P/No : Application Status by Inverter Version ① RM-30LZ50 : ~411KG(6.0V) ② DN-30LZ30 : 405KG~411KG(6.0V) ③ DN-30LZ30A : ~411KG(6.0V)

5.Service INVERTER VER6.0 : Delete Q8 & Q9 on Inverter PCB (6632L-0048C) ※ MODULE R/NO: 6304FLP122A


RM-30 32LZ50 Picture NOISE SVC One-Point DD-LCD TV05-1205 1.Subject :

RM-30 32LZ50 Picture NOISE

2.Model :

RM-30LZ50/32LZ50

3.Defect Condition : Noise at vertical lines as JITTER NOISE

4.Cause

Defect Cause: IC505 5V LINE Ripple NOISE Remove the noise by using 47㎌/16V Capacitor Part Spec: 47UF 16V 20% 85STD (P/No.: 0CE476CF638)

5.Service Add capacitors at both ends of IC505 PART-NO: 0CE476CF638 ※ Capacitor polarity should be checked


RM-23LZ50 Auto Volume Up SVC One-Point DD-LCD TV05-1206 1.Subject :

RM-23LZ50 Auto Volume Up

2.Model :

RM-23LZ50

3.Defect Condition : RM-23LZ50 Auto Volume Up - Volume suddenly goes up when power is on 4.Cause

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)

5.Service

Remove wafer and solder Connector Lead PART-NO: 6871TST630A ※ Lead should remain as it is

Can be replaced with 6871TST630A


DN-37LZ30 SVC One-Point DD-LCD TV05-1213 1.Subject :

DN37LZ30_Black & White Picture

2.Model Applied :

DN-37LZ30

3.Defect Condition : Analog TV, AV: Picture displays in black and white DTV, D-SUB, DVI: Picture displays in normal color

4.Cause

Defect Picture

Normal Picture

Defect Cause: X301(SC20.25A501) Part characteristics defect Part Spec: SCO-103 SUNNY 74.25MHZ +/- 50 (P/No.: 6204B47985H)

5.Service RF (Analog TV), AV Signal have no color (Black & white display) Replace X301(SC20.25A501) Characteristic Defect


RM-32LZ50 Picture NOISE SVC One-Point DD-LCD TV05-1215 1.Subject :

RM-32LZ50 No Picture with Sound

2.Model :

RM-32LZ50



4.Cause 1.Details ①Inverter off ②Channel up/Down: Normal ③Sound OK ④OSD & Video off ⑤Input change: Normal 2. Cancellation condition : DC Off / on & AC Off / on 3. Applied P/No : 411KG~502KG

5.Service

INVERTER : Remove R60 on Inverter PCB ※ MODULE R/NO: 6304FLP163A


DN-37 42LZ30(A) SVC One-Point DD-LCD TV05-1216 1.Subject :

DTV SOUND LOW

2.Model :

DN-37 42LZ30(A)

3.Defect Condition : Low Sound for DTV

4.Cause 1.Details DTV has low sound output comparing to Analog TV 2.Cause By adopting Dolby digital sound which is a sound standard for DTV

5.Service

→ Up Data using Tera Term program ① Boot Code change & S/W Up Data ⓐ Boot Code change Boot_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) SVC One-Point DD-LCD TV05-1217 Image Saturation (DTV)

1.Subject : 2.Model :

(Face & hair has black edge & white band)

DN-37 42LZ30(A)

3.Defect Condition : Image Saturation (DTV) (Face and hair has black edge and white band)

4.Cause 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 5.Service → Replace IC810 V4.03 with V4.04 (0IZZTSZ473A) → Replace Digital Board (33139D3010A)


DN-42LZ30(A) SVC One-Point DD-LCD TV05-1218 1.Subject :

Image Saturation (DTV)

2.Model :

(Face & hair has black edge & white band)

DN-42LZ30(A)

3.Defect Condition : Image Saturation (DTV) (Face and hair has black edge and white band)

4.Cause 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 5.Service → Replace IC810 V4.04 with V4.05 (0IZZTSZ552A) → Replace Digital Board * Check point Al 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


DN-30 37 42LZ30(A) SVC One-Point DD-LCD TV05-1223 1.Subject :

DN-30 37 42LZ30(A) NO VIDEO

2.Model :

DN-30 37 42LZ30(A)


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

4.Cause 1.Details ① Inverter on ② No channel operation/No Sound ③ OSD & Video off ④ Index window (Front display panel) On/Off ⑤ No input change ⑥ No remote control operation 2. Cancellation condition : AC Off / on 3. Applied P/No : ① DN-30LZ30A : 411KG~502KG ② DN-37LZ30A : 411KG~502KG ③ DN-42LZ30A : 411KG~502KG

5.Service → Replace Digital Board ① Connect Jumper wire at IC314 TP POINT (HD2 Chip Latch up) ② Remove R250 and connect to upper part of R250 ③ DN-37/42LZ30(A) CPLD UP Data (4.01 → 4.02) DN-30LZ30(A) CPLD UP Data (4.02 → 4.03)



DTV Sound Low

2.Model :

DN-37 42LZ30(A)

3.Defect Condition : DTV Sound is low

4.Cause 1.Details DTV has low sound output comparing to Analog TV 2.Cause By adopting Dolby digital sound which is a sound standard for DTV

5.Service

→ Up Data using Tera Term program ① Boot Code change & S/W Up Data ⓐ Boot Code change Boot_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) NO VIDEO(Latch up)

2.Model :

DN-37 42LZ30(A)


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

4.Cause 1.Details ①Inverter On ②No Channel operation/No Sound ③OSD & Video off ④Index window (Front display panel) on /off ⑤No input change ⑥No remote control operation 2. Cancellation condition : AC Off / on 3. Applied P/No : ① DN-37LZ30A : ~505KG ② DN-42LZ30A : ~505KG

5.Service

→ Up Data using Tera Term program ① Boot Code change & S/W Up Data ⓐ Boot Code change Boot_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) Change DN-42LZ30A S/W Version (3.12.2) → Replace Digital Board


RM-30LZ50/DN-30LZ30A SVC One-Point DD-LCD TV05-1230 1.Subject :

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

2.Model :

RM-30LZ50/DN-30LZ30A



4.Cause 1.Details ①Inverter off ②Channel up/Down: Normal ③Sound OK ④OSD & Video off ⑤Normal input change 2. Cancellation condition : DC Off / on & AC Off / on 3. Applied P/No : ① RM-30LZ50 : 411KG~412(8.1V) ② DN-30LZ30A : 411KG~502(8.1V)

5.Service INVERTER VER8.1 : Remove R60 on Inverter PCB (6632L-0048D/E) ※ MODULE R/NO: 6304FLP157A


LCD TV One-Point Guide (HOW TO REPAIR LCD)

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