LG 19LV2500 Service Manual

98 pages

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LED LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD01S

MODEL : 19LV2500/250A/250N/250U

MODEL :

19LV2500/250A/250N/250U-ZA

North/Latin America http://aic.lgservice.com

Europe/Africa http://eic.lgservice.com

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

Internal Use Only

Printed in KoreaP/NO : MFL67002102 (1102-REV00)

Service Manual1
Contents2
Safety Precautions3
General Guidance3
Leakage Current Hot Check3
Important Safety Notice3
Servicing Precautions4
General Servicing Precautions4
Electrostatically Sensitive (ES) Devices4
General Soldering Guidelines4
"Small-Signal" Discrete Transistor5
Power Output, Transistor Device5
Circuit Board Foil Repair5
IC Remove/Replacement5
Application Range6
Requirement for Test6
Test Method6
Specification6
- Component Video Input7
- Rgb (Pc)7
- Hdmi Input8
- DTV Mode8
- PC Mode8
- Designation9
- Main PCB Check Process9
Adjustment Instruction9
- After Downloading10
- Adjust Sequence10
- Function Check10
- ADC Process10
- Total Assembly Line Process11
- W/B Equipment Condition11
- DDC EDID Write11
- DDC EDID Write (HDMI 256Byte)11
- Edid Data12
- Auto Download12
- Manual Download12
- HD RGB EDID Data12
- V-COM Adjust(Only LGD(M+S) Module)13
- Model Name & Serial Number D/L13
- Signal TABLE13
- Outgoing Condition Configuration13
- Local Dimming Function Check14
- CI+ Key Download Method14
Block Diagram15
Exploded View16
- S7M-Plus_Divx_Ms1017
- LCD TV Repair Guide38
- Main PCB41
- 19/22/26Lv250041
- 22/26Lk33042
- 32/37/42/47Lk45043
- 32/37/42/47/55Lw450044
- Interconnection46
- 19/22Lv250046
- 19/22Lv550047
- 26Lv250048
- 26Lv550049
- 32Lv250050
- 37Lv340051
- 37Lv355052
- 42Lv450053
- 42Lw450054
- 32Lk53055
- 37Lk43056
- 42Lk45057
- Sub PCB58
- Contents of LCD TV Standard Repair Process60
- Video Error61
- No Video/ Normal Audio61
- No Video/ no Audio62
- Picture Problem63
- Picture Broken/ Freezing63
- Color Error64
- Vertical/Horizontal Bar, Residual Image, Light Spot65
- External Device Screen Error-Color Error65
- No Power66
- Off When On, off While Viewing, Power Auto On/Off67
- No Audio/ Normal Video68
- Wrecked Audio/ Discontinuation/Noise69
- General Function Problem70
- Remote Control & Local Switch Checking70
- Function Error71
- External Device Recognition Error71
- Noise72
- Circuit Noise, Mechanical Noise72
- Exterior Defect73
- Contents of LCD TV Standard Repair Process Detail Technical Manual74
- Check LCD Back Light with Naked Eye76
- LED Driver/Lamp Inverter B+ 24V Measuring Method77
- Check White Balance Value78
- Power Board Voltage Measuring Method79
- TUNER Input Signal Strength Checking Method80
- LCD-TV Version Checking Method81
- Checking Method for Remote Controller for Adjustment81
- LCD TV Connection Diagram82
- TUNER Checking Part83
- Check Link Cable (LVDS) Reconnection Condition84
- Adjustment Test Pattern - ADJ Key86
- Exchange T-Con Board87
- Solder Defect, CNT Broken87
- Abnormal Power Section88
- Solder Defect, Short/Crack88
- DIM Light89
- Exchange PSU(LED Driver)89
- No Light89
- Panel Mura, Light Leakage90
- Press Damage90
- Crosstalk90
- Check Front Display LED92
- Check Power Input Voltage and ST-BY 3.5V93
- Check the 3.5V When St-By93
- Checking Method When Power Is on94
- POWER off MODE Checking Method95
- Checking Method in Menu When There Is no Audio96
- Voltage and Speaker Checking Method When There Is no Audio97
- Remote Controller Operation Checking Method98

Other manuals for LG 19LV2500

Owner's Manual184 pages

Questions and Answers:

C
Chris JordanAug 31, 2025
Why do black spots appear on my LG 19LV2500 LCD TV screen?
- R
  Rickey LunaAug 31, 2025
  The appearance of several red, green, white, or black pixels on your LG LCD TV screen is normal and relates to the characteristics of the panel.
M
Matthew ThomasSep 1, 2025
What to do if the file does not appear on the Movie List of my LG LCD TV?
- R
  Ryan MartinezSep 1, 2025
  Check whether the extension is supported.
K
Kimberly DoyleSep 1, 2025
What to do if my LG 19LV2500 LCD TV displays “This file is invalid”?
- J
  James MartinSep 1, 2025
  If your LG LCD TV shows a message saying “This file is invalid” or the audio works but the video doesn't, check if the file plays correctly on a PC to ensure it's not damaged. Also, verify that the resolution, video codec, and frame rate are supported by the TV.
M
mhenrySep 1, 2025
What to do if my LG 19LV2500 LCD TV displays “Unsupported Audio”?
- C
  Chris WelchSep 1, 2025
  If your LG LCD TV displays an “Unsupported Audio” message, and the video works but the audio doesn't, first check if the file plays correctly on a PC to ensure it's not damaged. Then, verify that the audio codec, bit rate, and sample rate are supported by the TV.