Siemens KPT1200 touch screen repair:
The touch screen is not working well.
1.Fault phenomenon.
A touch screen that works extremely unstable, sometimes clicking normally, sometimes not responding.
2.Fault analysis and processing.
In view of this phenomenon, it is necessary to check whether the wiring interface is loose and whether the serial port and interrupt number conflict.
1. Surface acoustic wave touch screen.
1) Fault 1: Touch deviation.
Symptom 1: The position touched by the finger does not coincide with the header.
Reason 1: After installing the driver, there is no vertical touch of the bullseye center position when correcting the position.
Solution 1: Recalibrate the position.
Phenomenon 2: The touch in some areas is accurate, and the touch in some areas is biased.
Reason 2: A large amount of dust or scale has accumulated on the sound wave reflection stripes on the four periphery of the surface acoustic wave touch screen, which affects the transmission of sound wave signals.
Solution 2: Clean the touch screen, pay special attention to clean the sound wave reflection stripes on the four sides of the touch screen, and disconnect the power supply of the touch screen control card when cleaning.
2) Fault 2: No response to touch.
Phenomenon: When touching the screen, the header does not move, and no position changes.
Causes: There are many reasons for this phenomenon, which are explained one by one below
The dust or scale accumulated on the sound wave reflection stripes on the four periphery of the surface acoustic touch screen is very serious, causing the touch screen to not work;
The touch screen is malfunctioning;
The touch screen control card is faulty;
The touch screen signal line is faulty;
The serial port of the computer host is faulty;
The computer's operating system malfunctions;
Touchscreen driver installation error.
Common faults of Siemens touch screen are: black screen on power, flower screen, dark screen, blue screen, white screen, splash screen, no backlight, dark backlight, low contrast, no character with backlight, no response when powered on, burn insurance when powered on, can not boot normally, can not enter the system, broken screen, no response to touch, slow touch response, touch offset, touch crash, key failure, content confusion, PWR light is not lit, communication failure, power board failure, high voltage board failure, motherboard failure, etc.
Siemens touch screen repair: TP070, TP170A, TP177A, TP170B, TP177Micro, TP177B, TP177B PN DP, TP270, TP27, TP277, TP37, KTP178, KTP400, KTP600, KTP1000, KTP1500, etc.
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Siemens multi-function panel repair: MP270, MP277, MP277-8Key, MP277-10Key, MP277-10Touch, **70-12 Touch, **70-12Key, **70-15Touch, **70-19Touch, **77-12Touch, **77-12Key, **77-15Touch, **77-19Touch, etc.
Siemens text panel: TD400C, TD200, TD390, TD17
Siemens mobile explosion-proof panel repair: mobile177dp, mobile177pn, mobile277
Siemens Smart Line panel repair: Smart 700, Smart 700ie, smart 1000, smart 1000ie
Siemens PP7 operation panel maintenance: PP7, PP171, PP1711
Siemens SIMATIC Thin Client panel: SIMATIC Thin Client 10" touch、simatic thin client 15" touch、simatic thin client pro 15" touch、package mp277 10" thin client 10"、starter pack thin client 10" smartaccess、starter pack thin client 15" smartaccess、ip65-clamp-set for simatic thin client
Siemens SIMATIC HMI Comfort Panel: TP700, TP900, TP1200, KP400, KP700, KP700, KP900, KP1200