Technical description and composition of the BBK LED2451HD TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: LED2451HD
Chassis / Version: L2M25
Panel: LM230WF5 (TL) (D1)
T-CON: LM230WF5-TL D1 P / N: 6870-1128A; LDA5001A, SM4005A
LED driver (backlight): Driver
PWM LED driver: BIT3251
MOSFET LED driver: 2504
Power Supply (PSU): TPE056 REV: 1.0
PWM Power: LD7575PS
MOSFET Power: FQPF8N60C
MainBoard: L2M25 (05)
IC MainBoard: TSUMV26KE-LF, EN25F40, TDA1517P
Tuner: DWE-7053BW-PLL1
Technical Specifications LED2451HD
BBK LED2451HD
General repair guidelines for TV LCD LED
Service Manual with Schematic Diagram 61 pages 2009-2010 on the LED1951SI, LED2251HD, LED2451HD model.
Firmware SPI FLASH BBK LED2451HD L2M25, Main: L2M25 (05), Panel: LM230WF5 (TL) (D1)
Appearance of LED-driver with BIT3251 controller:
BIT3251
Repair MainBoard
The appearance of the MainBoard L2M25 is shown in the figure below:
L2M25
The appearance of the power supply
Main features of the BBK LED2451HD device:
Installed matrix (LED-panel) LM230WF5 (TL) (D1).
The matrix control uses the Timing Controller (T-CON) LM230WF5-TL.
Driver LEDs are used to power the backlight LEDs, controlled by the BIT3251 PWM controller. As power elements of the LED driver, keys of type 2504 are used.
The necessary supply voltages for all nodes of the TV BBK LED2451HD are generated by the TPE056 power module or its analogs using LD7575PS microcircuits and power switches of the FQPF8N60C type.
MainBoard - the main board (motherboard) is an L2M25 module, using TSUMV26KE-LF, EN25F40, TDA1517P, and others.
The tuner DWE-7053BW-PLL1 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LM230WF5-TLD1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.184x286.416 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
The composition uses MainBoard L2M25 (05) and the LCD panel (matrix) LM230WF5 (TL) (D1).
Power Supply Unit (PSU) TPE056 REV: 1.0 Power Supply.
BBK LED2451HD LED TV with LM230WF5 LCD, 24 "(61 cm) diagonal display in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000: 1 The LED display technology is implemented in the model’s display manufacturing technology.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). 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, WMA, MPEG4, VideoCD, SVCD , Picture CD, JPEG.
The power of the sound system 3 W (2x1.5 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), component, SCART, RGB, VGA, HDMI, 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, 1360x768, 1920x1080.
The power consumed by the TV in the operating mode from the network is 48 watts.
Overall dimensions: 573x400x170 mm.
TV Weight: 4.8 kg.
Attention! The LM230WF5 (TL) (D1) panel of the BBK LED2451HD 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