Technical description and composition of the BBK LED2252HD TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: LED2252HD
Chassis / Version: L2M31
Panel: V215H1 Rev C1
LED driver (backlight): LDA15-42V240H
MOSFET LED driver: B6010D EP53566,
Trans LED driver: 470
Power Supply (PSU): TPE040A-X
MainBoard: L2M31
Tuner: AFP7 / W810G
Control: RC1951
Technical Specifications LED2252HD
BBK LED2252HD
General repair guidelines for TV LCD LED
Possible malfunctions
- BBK LED2252HD TV does not turn on. There are no signs of operability. The indicators on the front panel do not shine and do not blink, and the remote control and control buttons do not respond.
Typically, with such manifestations, the defect is caused by faulty elements in the main power supply module TPE040A-X. It is necessary to verify the presence of secondary voltages and, if not, check the power switches 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 a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the L2M31 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).
If there is no reception of television channels, but the TV works properly from external devices, first of all you need to check the voltage of the AFP7 / W810G tuner and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention! Users and owners of LED2252HD TVs who do not have the appropriate qualifications, knowledge and experience are strongly advised against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LED1952SI, LEDLED2252HD, LED2452HD
Service Manual with Schematic Diagram 79 pages of 2011 on the LED1952SI, LED2252HD, LED2452HD model
Main features of the BBK LED2252HD device:Installed matrix (LED-panel) V215H1 Rev C1.
The LED driver LDA15-42V240H is used to power the backlight LEDs. A 470 transformer is installed in the LED driver converter. Keys like B6010D EP53566, are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the BBK LED2252HD TV is carried out by the TPE040A-X power module, or its analogues.
MainBoard - the main board (motherboard) is an L2M31 module.
The AFP7 / W810G tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: CMO
Model: V215H1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 13S6P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
BBK LED2252HD LED TV with V215H1 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 1000: 1 This model uses side illumination from Edge LEDs.The design and technical capabilities of the TV include viewing programs 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 m It 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 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, 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 45 watts.
Overall dimensions: 550x405x125 mm.
The mass of the TV: 5.3 kg.
Attention! The BBK LED2252HD TV panel V215H1 Rev C1 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.