Technical description and composition of the BBK LEM2292F TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM2292F
Chassis / Version: E182VG-Z3-C0
Panel: M215BD1WU3-2
MainBoard: E182VG-Z3-C0
IC MainBoard: CPU: MST6M182VGC-LF-Z1; SPI Flash: 25Q32
Tuner: Unlabeled
Technical Specifications LEM2292F
BBK LEM2292F
General repair guidelines for TV LCD LED
BBK LEM2292F, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. 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. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain BBK models. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
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 the BBK LEM2292F has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the M215BD1WU3-2 panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
To check the health of the LEDs, as well as contact connections in the ruler circuit, the panel must be disassembled.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
Repair or diagnostics of the E182VG-Z3-C0 motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - CPU: MST6M182VGC-LF-Z1; SPI Flash: 25Q32 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If you suspect a malfunction of the tuner. Without marking, first of all, make sure that there is a supply voltage on the corresponding output of the tuner.
Attention to the owners! Attempts to self-repair the BBK LEM2292F TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service Manual with Schematic Diagram 34 pages 2011 on LEM1992, LEM2292F, LEM2492F.
Repair MainBoard
The appearance of the MainBoard E182VG-Z3-C0 is shown in the figure below:
E182VG-Z3-C0
E182VG-Z3-C0 can be used in TVs:
BBK LEM2292F (Panel M215BD1WU3-2), BBK LEM2492F (Panel LC230EUE (TD)(A1) ).
Main features of the BBK LEM2292F device:
Installed matrix (LED panel) M215BD1WU3-2.
The required supply voltage for all components of the TV BBK LEM2292F provides a switching power supply.
MainBoard - the main board (motherboard) is an E182VG-Z3-C0 module, using CPU chips: MST6M182VGC-LF-Z1; SPI Flash: 25Q32 and others.
The tuner without marking provides the reception of television programs and tuned to channels.
BBK LEM2292F LED TV with M215BD1WU3-2 LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlight LED. The ratio of maximum brightness to minimum (contrast) is 1000 : 1. This model uses Edge LED backlighting, and the design and technical features of the TV include watching broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Input high-frequency or video signal l can be processed in analogue systems PAL, SECAM .. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic system of sound 6 W (2x3 W) provide 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, VGA, HDMI x2, USB x2. 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, 1920x1080.
The power consumed by the TV in the operating mode from the network is 35 watts.
Overall dimensions: With stand 542x389x160 mm, Without stand 542x354x20 mm.
Mass of the TV: 4.3 kg.
Attention! The M215BD1WU3-2 BBK LEM2292F LED TV panel 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.