Technical description and composition of the BBK LEM3249HD TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LEM3249HD
Panel: V315H4-LE1 rev C-01 // V315H4-XCE2
Trans LED driver: MSC ZY-T0118 MSC ZY-T0117
Power Supply (PSU): TV3202-ZC02-01 (D)
PWM Power: ISE380565J, G0949LOP (8)
MainBoard: MSTV3200-ZC01-01 222-110119001 H4LE2-20110120-Ver01
IC MainBoard: CPU: MST6M48RHS LF Z1, Sound: TPA3113D2, SPI Flash: EN25Q32B-104HIP
Tuner: F21WT-3BAR-E
Control: RC3229
Technical Specifications LEM3249HD
BBK LEM3249HD
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The BBK LEM3249HD TV does not turn on and does not show any signs of turning on. There are no reactions to the control buttons or the remote control.
Failure in such cases should be sought in the TV3202-ZC02-01 (D) power supply circuits. It is necessary to measure its secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip ISE380565J, G0949LOP (8) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the MSTV3200-ZC01-01 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MST6M48RHS LF Z1, Sound: TPA3113D2, SPI Flash: EN25Q32B-104HIP 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 F21WT-3BAR-E tuner malfunction, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
We recommend the owners of the LEM3249HD TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of the MainBoard MSTV3200-ZC01-01 is shown in the figure below:
MSTV3200-ZC01-01
Main features of the BBK LEM3249HD device:
Installed matrix (LED-panel) V315H4-LE1 rev C-01 or V315H4-XCE2. In the converter of the LED driver, the transformer MSC ZY-T0118 MSC ZY-T0117 is installed.
The necessary supply voltages for all nodes of the TV BBK LEM3249HD are generated by the TV3202-ZC02-01 (D) power module or its analogs using ISE380565J, G0949LOP microcircuits (8).
MainBoard - the main board (motherboard) is an MSTV3200-ZC01-01 module, using CPU chips: MST6M48RHS LF Z1, Sound: TPA3113D2, SPI Flash: EN25Q32B-104HIP and others.
The F21WT-3BAR-E tuner provides television reception and channel tuning.
BBK LEM3249HD LED TV with V315H4-LE1 LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 6000 : 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 can be processed in analogue 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, MPEG4, Xvid, DivX, MKV, Jpeg.
The power of the sound system 16 W (2x8 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 power consumed by the TV in the operating mode from the network is 90 watts.
Overall dimensions: With stand 864x565x130 mm, Without stand 580x402x79 mm.
TV Weight: 8 kg.
Attention! The V315H4-LE1 rev C-01 panel of the BBK LEM3249HD 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.