Technical description and composition of the BBK LEM2281FDT TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM2281FDT
Chassis / Version: MSDV3213
Panel: CLAA215FA10 // M215HG-LE3 REV C3
LED driver (backlight): integrated into MainBoard
PWM LED driver: AP3039AM-G1, AP3608EM-G1
MOSFET LED driver: B6010D
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: MSDV3213-ZC01-01
IC MainBoard: Cpu: MSD309PX, Spi Flash: MX25L6406E
Tuner: DT58WT-3RB-E
Technical Specifications LEM2281FDT
BBK LEM2281FDT
General repair guidelines for TV LCD LED
BBK LEM2281FDT, like other TVs, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. 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.
In cases where the BBK LEM2281FDT TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or the processor is not powered on motherboard (a typical defect of some BBK TVs). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If BBK LEM2281FDT does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the M215HG-LE3 REV C3 panel, or their power converter - LED drivers. 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, it is necessary to disassemble the panel.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes.
In cases of attempts to repair the motherboard MSDV3213-ZCO1-01, 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.
Board repair and chip replacement Spi Flash: MX25L6006E 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.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the tuner DT58WT-3RB-E.
Owners and users of the BBK LEM2281FDT TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
FIRMWARE FOR SPI FLASH -----------> BBK LEM2281FDT, Main: MSDV3213-ZC01-01, Panel: CLAA215FA10
Schematic Diagrams 12 pages of 2011 on model -------------> LEM1981DT, LEM2281FDT, LEM2465DTG, LEM2481FDT, LEM2648DT, LEM2649FTD, LEM2665FDTG, LEM2681FDT, LEM3248DT, LEM3249FDT, LEM3281FDT.
Backlight: LED216-ZC14-03(A) 30321601203, 49 Leds, Edge LED (M215HG-LE3)
The appearance of the MainBoard MSDV3213-ZC01-01 is shown in the figure below:MSDV3213-ZC01-01
MSDV3213-ZC01-01 can be used in TVs:
BBK LEM1981 (Panel V185B1-L17 Rev.C1 CMO), BBK LEM2481FDT (Panel V236H1-LE5), BBK LEM2682 LEM2682DT (Panel V260B2-LE11 Rev.C1), BBK LEM2281FDT (Panel CLAA215FA10), BBK LEM2685DTG (Panel V260H1-LE8 REV.C1), MYSTERY MTV-2620LW (Panel V260B2-LE3 Rev.c1).
Main features of the BBK LEM2281FDT device:
Installed matrix (LED-panel) CLAA215FA10 or M215HG-LE3 REV C3.
To power the backlight LEDs, a converter is used, combined with the main board MSDV3213-ZC01-01, controlled by the AP3039AM-G1, AP3608EM-G1 PWM controller. As power elements of the LED driver, keys of the type B6010D are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is an MSDV3213-ZC01-01 module, using Cpu chips: MSD309PX, Spi Flash: MX25L6406E and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
BBK LEM2281FDT LED TV with CLAA215FA10 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 800: 1 This model uses side illumination from Edge LEDs.The design and technical capabilities of the TV include watching programs and movies in high quality HD with 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 analog systems PAL, SECAM, NTSC. 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, audio x2, component, SCART, RGB, VGA, HDMI x2, 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. The digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV in the operating mode from the network is 38 watts.
Overall dimensions: With a support 518x363x160 mm, Without a support 518x322x50 mm.
TV Weight: 3.8 kg.
Attention! The CLAA215FA10 panel of the BBK LEM2281FDT 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.
