Hirschmann display maintenance computer controller repair

The common faults of hesman display are ： Power on black screen 、 Blurred screen 、 Dark screen 、 Blue screen 、 hang 、 Flash screen , No backlight 、 Dark backlight 、 Low contrast 、 Backlight, no characters , No response when powered on 、 Power on and burn the components , Can't power on properly .

Our company has LCD screens commonly used by touch screens of various brands 、 Touch Pad 、 High pressure plate 、 Panel film and other accessories . Quality assurance 、 Seek efficiency , Cooperate sincerely 、 Integrity and win win . Maintenance services are generally based on faults after detection 、 Quotation of touch screen size . Refine the man-machine interface of various brands , Touch screen , Touch screen , Industrial display , Text display . Unlimited brands 、 It's not limited to models .

Crane computer maintenance Maintenance operation screen HIRSCHMANN Touch screen maintenance HIRSCHMANN Display maintenance HIRSCHMANN Man machine interface maintenance

The fault phenomenon ： Electrify DC24 v , The screen is dull , The current is about 230mA Treatment process ： Touch the screen with your hand , The buzzer echoes , Clarify that the program is working properly . Measuring high voltage strip 12 v DC The voltage is normal , Control voltage ENABLE Low useful is low level normal . Explain that the problem is that the high-voltage circuit or lamp has been damaged . When it was disassembled, it was found that one end of the lamp tube was blackened , There is still no light after replacing the lamp , Check that the high-voltage transformer is also damaged . There is no such high-voltage transformer on the market , So I bought one LCD High pressure strip with two tubes , Connect the wire and fix it , Normal power on .

There is no display on the screen after power on , The current is about 100mA Correction process ： Touch the screen with your hand , The buzzer doesn't respond , Clarify that the program is not working properly . Measure several groups of voltages with a multimeter 3.3 v 、5.1 v 、12 The voltage is normal . According to the user , After the user found the fault of the contact screen, he tried to repair , During power on , There was a normal situation , But it won't work if you turn it on again after power failure . Analysis of faulty soldering at a pin of the chip , Make the bus fault , Then the program can't run . Then the hot-air gun is used to heat the dense foot chip and foot , At the same time, press the chip with tweezers , Make the welding leg and tin fuse from the beginning . After the above treatment , Start from scratch , The current rises to 470mA normal .