LCD screen maintenance equipment bonding machine
Fault analysis; When such faults occur, the first step is to analyze them separately.
Different sizes of screens have different fault points due to the separation of Y-axis
power supply and left and right Y-axis power supply
1、 For screens with single Y-axis power supply (below 39 inches), the probability
of damage to the logic board is very low due to the fact that only one side of the
screen is powered by Y, and half of the screen is normal. The problem mainly
focuses on COF and side boards
① The COF problem mainly focuses on the two COFs in the middle. When judging,
you can press the COFs on both sides separately with your hand to see if there is
any change in the fault, and then replace the corresponding COF.
② Edge plate malfunction; Edge plate faults are generally concentrated in two aspects:
one is poor contact of the flexible cable, resulting in broken wires and damage, and the
other is corrosion and oxidation of the edge plate. Replacement of the corresponding material is sufficient.
2、 For the screen powered by Y-axis, the fault points are:
① COF fault, which is concentrated on X1, usually caused by ITO electrode burnout due to liquid inlet damage.
Replace the corresponding COF or fly wire for handling.
② Swap the left and right sides of the soft ribbon cable fault, confirm the problem, and replace the ribbon cable.
③ Logic board damage, which is for high-definition screens where the logic board is powered on both sides.
Guangzhou weicai electronic technology Co., Ltd.
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