Technical description and composition of the BBK LEM2665FDTG TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM2665FDTG
Chassis / Version: MSDV3209-ZC01-01
Panel: V260H1-LE8
MainBoard: MSDV3209-ZC01-01 (D)
IC MainBoard: Cpu: MSD309PX-LF-SW, Spi Flash: 25Q6406, DDR: NT5TU32M16DG-AC (2-PC)
Tuner: DT58WT-3RB-E
Technical Specifications LEM2665FDTG
BBK LEM2665FDTG
General repair guidelines for TV LCD LED
TV BBK LEM2665FDTG, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal 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 most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
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 diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
In cases where the BBK LEM2665FDTG TV lost the image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the V260H1-LE8 panel). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
In cases of attempts to repair the motherboard MSDV3209-ZC01-01 (D), 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 cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its Cpu chips: MSD309PX-LF-SW, Spi Flash: 25Q6406, DDR: NT5TU32M16DG-AC (2-ШТ) and other possible faulty components . Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the DT58WT-3RB-E tuner, if there is no tuning for the channels, first check the supply voltage at its terminals.
Remember! Attempts to self-repair by users of the BBK LEM2665FDTG TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Main MSDV3209-ZC01-01 Schematic diagram
FIRMWARE FOR SPI FLASH -----------> BBK LEM2665FDTG, Main: MSDV3209-ZC01-01(D), Panel: V260H1-LE8
1. Service Manual with Schematic Diagram 81 pages of 2010 on -----------> LED1952DTG, LED2252FDTG, LED2452FDTG, LEM2249FDT, LEM2265FDTG, LEM2285FDTG, LEM2449FDT, LEM2465FDTG, LEM2485FDTG, LEM2648DT, LEM2649FDT, LEM2665FDTG, LEM3281FDT, LEM3282DT, LEM3285FDTG
2. Schematic Diagrams 12 pages of 2011 on the models -----------> LEM1981DT, LEM2281FDT, LEM2465DTG, LEM2481FDT, LEM2648DT, LEM2649FTD, LEM2665FDTG, LEM2681FDT, LEM3248DT, LEM3249FDT, LEM3281FDT.
The appearance of the MainBoard MSDV3209-ZC01-01 is shown in the figure below:MainBoard MSDV3209-ZC01-01 uses a multifunctional microprocessor of the type MSD309PX or MSD308PX with an integrated scaler. Two RAM chips W9751G6IB are used as RAM. SPI Flash MX25L6406EMI-12G is made in the SOP-16 (16 pin) package.
It is advisable to start the repair of the motherboard by checking the voltage + 5V standby mode. In the operating mode, it is necessary to check the operability of linear stabilizers and power converters of the processor, memory, panel and other components of the board.
MSDV3209-ZC01-01 can be used in TVs:
BBK LEM3281FDT (Panel V315B1-LE9 REV.C1), BBK LEM3285FDTG (Panel V315H4-LE7 REV.C1), BBK LEM1949DT (Panel HT185WX3-100), BBK LEM3248DT (Panel V315B1-LE7 REV.C1), BBK LEM2665FDTG (Panel V260H1-LE8), BBK LEM3249FDT (Panel V315H4-LE8), BBK LEM2449FDT (Panel M236MWF7), BBK LEM3282DT (Panel V315B1-LEA), MYSTERY MTV-4018LW (Panel T390HVN01.0), MYSTERY MTV-4022LW (Panel M390HJ1-P01), MYSTERY MTV-4214LW (Panel T420HW08 V.5 FHD), MYSTERY MTV-3214LW (Panel V315H4-LE2 Rev.C1), MYSTERY MTV-4217LW (Panel T420HW09 V.9 (FHD)), MYSTERY MTV-3220LW (Panel V315H4-LE7).
Main features of the BBK LEM2665FDTG device:
Installed matrix (LED-panel) V260H1-LE8.
The required supply voltage for all components of the BBK LEM2665FDTG TV provides a switching power supply.
MainBoard - the main board (motherboard) is an MSDV3209-ZC01-01 module, using Cpu microcircuits: MSD309PX-LF-SW, Spi Flash: 25Q6406, DDR: NT5TU32M16DG-AC (2-PC) and others.
Tuner DT58WT-3RB-E provides the reception of television programs and tuning to channels.
BBK LEM2665FDTG LED TV with V260H1-LE8 LCD, 26 "(66 cm) diagonal size of 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 800 : 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 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, Xvid, DivX , 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, 1360x768, 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 55 watts.
Overall dimensions: With a support 652x451x180 mm, Without a support 652x421x39 mm.
TV Weight: 7.5 kg.
Attention! The BBK LEM2665FDTG LED TV panel V260H1-LE8 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.