Technical description and composition of the BBK LEM2488F TV, type of panel and applicable modules. The composition of the modules.BBK LED
Model: LEM2488F
Chassis / Version: S243NZ4DERLA
Panel: LM230WF5 TLD1
LED driver (backlight): FSE060E0 (LED)
Power Supply (PSU): FSE060E0
PWM Power: LD7535 (PWM 6 pin)
MainBoard: 88XR-MCE182Z4D024S
Technical Specifications LEM2488FDT
BBK LEM2488F
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The BBK LEM2488F TV does not turn on, does not respond to the remote control and the control panel buttons, does not blink with any indicators.
Often in such cases, the FSE060E0 power module is faulty. It is necessary to measure the secondary output supply 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 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 LD7535 (PWM 6 pin) can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
Failure in most such cases is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the 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 on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the 88XR-MCE182Z4D024S 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).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> BBK LED1975, LED2275F, LED2475F, LEM1988, LEM2288F, LEM2488F (MST6M182VG + 2IN1 POWER SUPPLY)
Main features of the BBK LEM2488F device:Installed matrix (LED panel) LM230WF5 TLD1.
To power the backlight LEDs, the FSE060E0 LED driver is used.
The necessary supply voltages are generated for all nodes of the BBK LEM2488F TV by the FSE060E0 power module, or its analogs using LD7535 microcircuits (PWM 6 pin).
MainBoard - the main board (motherboard) is a 88XR-MCE182Z4D024S module.
Information from an alternative source:
BBK LEM2488FDT
Panel Type (Matrix): LM230WF5 (TL) (D1)
Motherboard: L0M05 (02)
T-con: LM230WF5-TLD1 P / N: 6870S-1120A
LED Driver: OT2405-0, IR: 5800-D26E60-M000 Ver: 01.00
PSU: F782003311 FSE060E0
Remote control: RC-LEM100
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 LEM2488FDT LED TV with LC230EUE LCD, 24 "(61 cm) diagonal size in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. 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 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 the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, 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, SCART, RGB, 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, 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 40 watts.
Overall dimensions: With stand 589x491x150 mm, Without stand 658x429x55 mm.
The mass of the TV: 4.4 kg.
Attention! The BBK LEM2488FDT LCD TV panel LC230EUE 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.