The Guidance To Repair Led Modules
Foreword:Today, LED displays can be found everywhere, in large shopping malls, roadside stores, elevators and even taxis.It brings a fast and convenient information age to our life, and also adds a beautiful color to the city's environmental decoration.
BUT Due to the lack of LED Screen hardware maintenance technology, most LED display users can only send the faulty LED modules Hardware back to the manufacturer for repair, resulting in many problems such as high product transportation costs and deep customer complaints(as shown in the following figure ).To this end, we wrote "The Guidance To Repair Led Modules" article, for your reference
II LED Modules Construction
LED Modules It is one of the core components of LED display. The quality of the LED modules directly affects the performance of the display screen.The unit board is composed of LED module, driver chip and PCB.The LED module is actually composed of many LED luminescence points encapsulated by resin or plastic lattice.
LED Module Framework
LED Module Power Supply﹠Cables
Common Use LED Module Chips Information
Name |
Legend |
Function Description |
PIN Definition |
74HC245 Power Amplifier |
|
8-Channel High Speed COMS Bus transceiver Signal Power Amplification |
|
ICN 2038S Drive IC |
|
16-Channel Constant Current Cink Output LED Driver. Precise control of lamp bead luminescence |
|
74HC138 Decoding Chip |
|
8-Bit Binary Decoder, 74HC138 Is Used To Select Display Rows
|
|
4953 Line Management Chip |
|
The Current Required to Drive A Whole Row Of LED Lamps Is Relatively Large, So It Is Necessary To Use 4953 To Drive
|
|
Capacitance |
|
An energy storage device that provides energy to a local device can homogenize the output of the voltage regulator and reduce load requirements |
|
III LED Module Fault Description﹠Solutions
IV LED Module Repair Process
Tools :
Steps
Finally, most of the faults of the LED modules is caused by reasonable failure rates