Technical description and composition of the ERISSON 19LEC21T2 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 19LEC21T2
Chassis / Version: TE.S512.EA67
Panel: KM19-H3-PN02
MainBoard: TE.S512.EA67
IC MainBoard: Flash GD25Q64
Technical Specifications 19LEC21T2
ERISSON 19LEC21T2
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular ERISSON 19LEC21T2, it is advisable to start with a careful external examination of internal and external elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the power supply module malfunctions, the external manifestations may be different, for example, ERISSON 19LEC21T2 does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If ERISSON 19LEC21T2 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the KM19-H3-PN02 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
In cases of attempts to repair the TE.S512.EA67 motherboard, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software. BGA chips can in most cases be diagnosed by local heating.
Board repair and chip replacement Flash GD25Q64 are made with the necessary equipment, and the corresponding hardware base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
We recommend the owners of the 19LEC21T2 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 19LEC21T2, Main: TE.S512.EA67, Panel: KM19-H3-PN02
The appearance of MainBoard TE.S512.EA67 is shown in the figure below:TE.S512.EA67
Main features of the ERISSON 19LEC21T2 device:
Installed matrix (LED panel) KM19-H3-PN02.
The required supply voltage for all nodes of the TV ERISSON 19LEC21T2 provides a switching power supply.
MainBoard - the main board (motherboard) is a TE.S512.EA67 module, using Flash GD25Q64 chips and others.
TV ERISSON 19LEC21T2 with LCD KM19-H3-PN02, diagonal size 18.5 "(47 cm) 16: 9 format. The required brightness of the screen 180 cd / m² is provided by LED backlight LED. Contrast, as the ratio of maximum brightness to minimum, is 1000: 1. In the technology of manufacturing the screen of this TV model, LED backlighting is implemented.High quality images can be viewed at 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in . Tax PAL, SECAM, NTSC systems Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 10 W (2x5 W) provides two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, VGA, HDMI, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 436x287x122 mm.
The mass of the TV: 2.1 kg.
Attention! The KM19-H3-PN02 panel of an ERISSON 19LEC21T2 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.