Technical description and composition of the BBK LEM2285FDTG TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM2285FDTG
Chassis / Version: MSDV3213-ZC01-01
Panel: CLAA215FA14 CHUNGHWA
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-LF-Z, SPI-Flash: MX25L6406EMI-126 (16 pin), Audio: TPA3113D2
Tuner: DT58WT-3RB-E
Control: IR: TV1631-ZC25-01 (B) 303C1631232
Technical Specifications LEM2285FDTG
BBK LEM2285FDTG
General repair guidelines for TV LCD LED
Possible malfunctions
- The BBK LEM2285FDTG TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or to the remote control.
In such cases, the main power source, the AC / DC voltage converter, which is combined with the MainBoard MSDV3213-ZC01-01, may turn out to be faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PWM SOT23-6, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the motherboard MSDV3213-ZC01-01 should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MSD309PX-LF-Z, SPI-Flash: MX25L6406EMI-126 (16 pin) requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the DT58WT-3RB-E tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via I2C
Attention TV owners! Attempts to self-repair BBK LEM2285FDTG are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> BBK LEM2285FDTG, Main: MSDV3213-ZC01-01, Panel: CLAA215FA14
Service Manual with Schematic Diagram 81 pages of 2010 on the model -----------> LED1952DTG, LED2252FDTG, LED2452FDTG, LEM2249FDT, LEM2265FDTG, LEM2285FDTG, LEM2449FDT, LEM2465FDTG, LEM2485FDTG, LEM2648DT, LEM2649FDT, LEM2665FDTG, LEM3281FDT, LEM3282DT, LEM3285FDTG.
To reduce the backlight current in LED drivers with the AP3039AM controller and the AP3608EM terminal stage (AP3039AM-G1 & AP3608EM-G1), the AP3608EM (AP3608E) microcircuit should proportionally increase the resistor from terminal 14 (ISET) to the housing. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 1.194V / Rset. In channels connected in parallel, the currents add up.
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 LEM2285FDTG device:
Installed matrix (LED-panel) CLAA215FA14 CHUNGHWA.
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-LF-Z, SPI-Flash: MX25L6406EMI-126 (16 pin), Audio: TPA3113D2 and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
BBK LEM2285FDTG LED TV with CLAA215FA14 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 Edge LED backlighting, and the TV is designed and built to watch high-quality broadcasts and movies at a resolution of 1920x1080 pixels in graphic resolution according to the 1080p standard (Full HD). 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. 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 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 35 watts.
Overall dimensions: With stand 538x376x165 mm, Without stand 538x345x38 mm.
The mass of the TV: 5.2 kg.
Attention! The CLAA215FA14 CHUNGHWA panel of the BBK LEM2285FDTG 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.
