Technical description and composition of the BBK LED2452FDTG TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: LED2452FDTG
Chassis / Version: L1M04 (00)
Panel: LM230WF5 TLD1 // LC230EUE TDA1
LED driver (backlight): FSE060E0
PWM LED driver: BIT3251 (8)
MOSFET LED driver: NE15N10-G (3)
Power Supply (PSU): FSE060E0
PWM Power: LC1 35 (6 pin)
MainBoard: L0M04 (00) 88XR-L1M04002473DT RM-01 KB-6160
IC MainBoard: MSD309PX-LF-Z1, Winbond 25Q32, YD1517
Tuner: NoName
Control: RC-LED100
Technical Specifications LED2452FDTG
BBK LED2452FDTG
General repair guidelines for TV LCD LED
Possible manifestations of defects
- BBK LED2452FDTG TV does not turn on at all. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In such cases, the fault should be sought first in the FSE060E0 power supply module. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary first of all to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the power 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, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip LC1 35 (6 pin) 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, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
The most likely in these cases is a malfunction of the LED backlight. 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.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the L0M04 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard - YD1517 board. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
Owners and users of the BBK LED2452FDTG TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LED1952DTG, LED2252FDTG, LED2452FDTG
1. Service Manual with Schematic Diagram 81 pages of 2010 on the LED1952DTG, LED2252FDTG, LED2452FDTG, LEM2249FDT, LEM2265FDTG, LEM2285FDTG, LEM2449FDT, LEM2465FDTG, LEM2485FDTG, LEM2648DT, LEM2649FDT, LEM2665FDTG, LEM3281FDT, LEM3282DT, LEM3285FDTG
2. Service Manual with Schematic Diagram 32 pages on LEM1993, LED1994, LEM1995, LEM1996, LEM1997, LEM2293F, LED2294F, LEM2295F, LEM2296F, LEM2297F, LEM2493F, LED2494F, LEM2495F, LEM2496F, LEM2497F, LEM2993, LED2994, LEM2995, LEM2996, LEM2997, LED2253FW, LED1952DTG, LED2252FDTG, LED2452FDTG, LED2278F.
The appearance of the MainBoard L0M04 is shown in the figure below:L0M04
The appearance of the power supply
Main features of the BBK LED2452FDTG device:
Installed matrix (LED panel) LM230WF5 TLD1 or LC230EUE TDA1.
The LED driver FSE060E0 is used to power the backlight LEDs, it is controlled by the BIT3251 PWM controller (8). As the power elements of the LED driver, keys of the type NE15N10-G (3) are used.
The necessary supply voltages for all nodes of the BBK LED2452FDTG TV are generated by the FSE060E0 power module or its analogs using LC1 35 (6 pin) microcircuits.
MainBoard - the main board (motherboard) is an L0M04 module, using microchips MSD309PX-LF-Z1, Winbond 25Q32, YD1517 and others.
The NoName tuner provides television reception and channel tuning.
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
BBK LED-TV LED2452FDTG with LM230WF5 LCD display, diagonal size 24 "(61 cm) 16: 9 format. The required brightness of the screen is 250 cd / m² 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 watching programs and movies in high quality HD with 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, WMA, MPEG4, MKV, VideoCD, SVCD, 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 x2, 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. 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 40 watts.
Overall dimensions: 589x425x125 mm.
TV Weight: 6.5 kg.
Attention! The LM230WF5 TLD1 panel of the BBK LED2452FDTG 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.
