Corporate profile
The led display maintenance information provided by fresan langway electronics technology ltd. Consists of the computer control part, the display drive matrix, the led display array, and the four large parts of the power source。
Among the more problematic are: 1. Interface issues. Symptoms: computer information cannot be shown, checking cable 2. Power problem. Led shows low-pressure large current power sources, which are not very different from regular direct current power sources. Each row or column does not show a problem with the counterpart drive (chips) and can be replaced by 4. The long-term use of led monitors may damage ageing and repair replacement is sufficient。
Led displays the common malfunction process of the screen - diagnostic process: 1, determines whether your display screens are synchronized with the display screen or with the anecdotal screens; synchronizes the screen displays with the settings of the monitor, and does not rely on the display settings; 2, determines whether your display screens are partially displaying problems or the whole screen display is problematic; partial displays exclude communication problems, generally determines that the display hardware is malfunctioning and you should contact us immediately to prevent an extension of the malfunction; the interface of the panel is shown in the right chart: note: n = ground (gnd)l = lock (lat or st)s = clock (clk)o = enabled (oe)e = enabled (/oe) r = red data g = green data u = blue data cd = line h = line f = suspend v = vcc)。
1. The same display panel interface, many of which show that the panel interface is not standard, allows us to upgrade systems such as text screens, low grey screens, high grey screens, which are low-cost and fast-impact. 2. Displays the panel interface. If the client shows that the panel interface is not exactly the same as the standard interface listed above, but the number and type of signals are the same, the screen may also be upgraded at a slightly higher cost than the first scenario. A completely different display panel interface the original display screen panel interface of the customer is not exactly the same as described above, and the cost of adaptation is greater in this case. With the exception of led modules and some ic retentions, others, such as pcb boards, guilds, etc., are all replaced at higher cost。
1. Display the maintenance of the panel. Displays a line of light on the panel cause: a coder, 74hc 245, ls138 or ls145 is bad. Reason: tip127, 4953, ls138, ls145 is broken or the connection to the power pipe is broken one row or one column of the module is not bright. Reason: led module leads to welding. 2. Synchronized view screen system computers, displaying screens without any reaction reason: communication lines fail (e. G. Bad connection). Opens the computer, display screens flash, but no signal reason: the driver software ledsetup was not activated. The screen is displayed normally, but there is a flash on the whole screen because of a failure of the communication line, the delivery card reception card or the receipt card. Reason: display mode settings are problematic. Reason for abnormality in the display screen: checking the corresponding scanner, which may have no power, or hc 541, 74f245, 1016, which may have malfunctions or poor exposure. Reason: the master plate may not have power or the voltage is too low. There's old content on the switch, but there's no way to communicate, because there's an abnormal communication line, a bad connection, a bad communication interface chip 232 or a bad computer communication interface. Reason for loss of content: 3. 6 v batteries without electricity。
These are recurrent failures that clients are generally able to solve on their own. If you have a more complex situation, please contact us。
