Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Thursday, 21 March 2019

LG 37LH55 - BALLAST CIRCUIT - ON MAIN PWB TO POWER SUPPLY OUT TO BALLAST MCN-1 - SCHEMATIC DIAGRAM - BALLAST CONNECTOR VOLTAGE & DIODE CHECK

LG 37LH55 - BALLAST CIRCUIT - ON MAIN PWB TO POWER SUPPLY OUT TO BALLAST MCN-1 - SCHEMATIC DIAGRAM - BALLAST CONNECTOR VOLTAGE & DIODE CHECK

LG 37LH55 P700 on Main PWB To Power Supply P201 Out P203 To Ballast MCN 1.
Click on images to Enlarge

PWM-DIM(PWM Dimming) Manipulates the Backlight Brightness via Customer’s OSD. Manipulates the Backlight Brightness via the video processor IC100.
Darker Picture, Darker Backlights to facilitate improved Contrast Ratio. 0.6V ~ 3.3V Range.

BALLAST CONNECTOR CN1 & CN4 VOLTAGE AND DIODE CHECK