Technical description and composition of the ERISSON 32LEC2500 TV, panel type and applicable modules. The composition of the modules.ERISSON LED
Model: 32LEC2500
Chassis / Version: JUC7.820.00117550
Panel: M320X13-E2-B
MainBoard: JUC7.820.00117550
IC MainBoard: SPI Flash: GD25Q64;
Tuner: CH DMI21-C816RH
Specifications 32LEC2500
ERISSON 32LEC2500
General repair guidelines for TV LCD LED
Repair of electronic devices, including the ERISSON 32LEC2500 TV, it is advisable to start with an external examination of its external and internal elements. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the case when the 32LEC2500 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the power supply module is probably defective in this case. If it is serviceable with such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. In general, 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.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the ERISSON 32LEC2500 does not have an image, but there is sound, the backlight LEDs of the M320X13-E2-B panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
In cases of attempts to repair the JUC7.820.00117550 motherboard, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - SPI Flash: GD25Q64; . In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the CH DMI21-C816RH tuner, if there is no tuning for the channels, first check the supply voltage at its terminals.
It should be remembered! Attempts to repair the ERISSON 32LEC2500 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> ERISSON 32LEC2500 , Main: JUC7.820.00117550, Panel: M320X13-E2-B
The appearance of the MainBoard JUC7.820.00117550 is shown in the figure below:JUC7.820.00117550
JUC7.820.00117550 can be used in TVs:
BBK 32LEM-1018/T2C (Panel C320X14-E12-H), DEXP H32B7200C (Panel C320X14-E12-H(G3)), DEXP H32B7400C (Panel C320X14-E3-H (G7)), ERISSON 32LEC2500 (Panel M320X13-E2-B), TELEFUNKEN LED32S22T2 (Panel M320X13-E1-A).
Main features of the ERISSON 32LEC2500 device:
The matrix (LED panel) M320X13-E2-B is installed.
The required supply voltage for all nodes of the TV ERISSON 32LEC2500 provides a switching power supply.
MainBoard - the main board (motherboard) is a JUC7.820.00117550 module, using SPI Flash chips: GD25Q64; and others.
The CH DMI21-C816RH tuner provides TV reception and channel tuning.
Trademark: ERISSON, Model: 32LEC2500.
Shortly from the TV: LCD, 720p HD, 32 "(81 cm) diagonal, HDMI: 2, USB: 2, backlight type: Edge LED.
The composition uses MainBoard JUC7.820.00117550 and an LCD panel (matrix) M320X13-E2-B.
ERISSON 32LEC2500 TV with an M320X13-E2-B LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 4000: 1. Edge LED backlighting is implemented in the LED-panel of this TV - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation is carried out in standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, MPEG4, JPEG. Stereo sound is realized by two built-in speakers. NICAM audio processing system is used. STEREO.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x2, USB x2. 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.
Overall dimensions: With stand 439x300x138 mm, Without stand 439x263x44 mm.
Attention! The M320X13-E2-B panel of an ERISSON 32LEC2500 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.