Technical description and composition of the BBK 40LEM-1043 TV, panel type and applicable modules. The composition of the modules.BBK LED
Model: 40LEM-1043 / FTS2C
Chassis / Version: CV512H-U42
Panel: V400HJ6-PE1 D40-M30
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3267 8 pin
MOSFET LED driver: ME15N10-G
Power Supply (PSU): integrated into MainBoard
PWM Power: AP3125 PWM SOT23-6
MOSFET Power: 7N60 TO-220F
MainBoard: CV512H-U42
IC MainBoard: SPI Flash: W25Q64, Audio: RDA3118E28 (TPA3110D)
Tuner: CDT-9NT372-RD60 & CDT-9NS161-RD41 J
Specifications 40LEM-1043 / FTS2C
BBK 40LEM-1043
General repair guidelines for TV LCD LED
Possible manifestations of defects
- BBK 40LEM-1043 does not turn on, does not respond to buttons and remote control, indicators on the front panel do not light and do not blink.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard CV512H-U42 main board. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, you should check the health of the power switches (TO-220) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In such cases, the most likely malfunction of the LED backlight elements. More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts is required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- 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 CV512H-U42 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 it is not possible to replace the MB board (SSB), you need to check the health of its elements - SPI Flash: W25Q64. Defective components should be replaced.
If a tuner CDT-9NT372-RD60 & CDT-9NS161-RD41 J is suspected of failure, first of all, it is necessary to verify the correctness of the software, as well as the presence of the required voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Owners and users of the BBK 40LEM-1043 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!
The appearance of the MainBoard CV512H-U42 is shown in the figure below:CV512H-U42
CV512H-U42 can be used in TVs:
DEXP H39D7000Q (Panel LC390TA2A), SUPRA STV-LC32LT0010W (Panel KM0320LDRH0037).
Main features of the BBK 40LEM-1043 device:
Installed matrix (LED-panel) V400HJ6-PE1 D40-M30.
To power the backlight LEDs, a converter is used, combined with the main board CV512H-U42, controlled by a BIT3267 8 pin PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter using AP3125 PWM SOT23-6 microcircuits and power switches of the 7N60 TO-220F type.
MainBoard - the main board (motherboard) is a CV512H-U42 module using SPI Flash chips: W25Q64, Audio: RDA3118E28 (TPA3110D) and others.
The CDT-9NT372-RD60 & CDT-9NS161-RD41 J tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: INNOLUX
Model: V400HJ6-PE1 Rev. C2
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 878.112x485.352 mm
Surface: Antiglare (Haze 1%)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: BBK, Model: 40LEM-1043 / FTS2C.
Briefly from the TV: LCD, 40 ", 1920x1080, 1080p Full HD, there is a satellite tuner, sound: 16 W, HDMI: 3.
Manufacturer: TELEBALT Kaliningrad, Kamskaya, 62. The assembly can be in the city of Guards, st. Station, 6 (PKV).
Developer: BBK Electronics LTD. China
The composition includes MainBoard CV512H-U42 and LCD-panel V400HJ6-PE1 D40-M30. The power supply is combined with the MainBoard.
BBK 40LEM-1043 / FTS2C LED TV with V400HJ6-PE1 LCD, 40 "(102 cm) diagonal size of 16: 9 format. The required brightness of the screen is 250 cd / m² with LED backlighting. The ratio of maximum brightness to minimum ( contrast ratio) is 4000: 1. The LED display technology is implemented in the model’s display technology. s multimedia files: MP3, WMA, MPEG4, HEVC (H.265), MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by 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, component, VGA, HDMI x3, USB. An output for connecting headphones is provided. The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
Overall dimensions: with stand 915x573x221 mm, without stand 915x534x87 mm.
TV Weight: 7 kg.
Attention! The BBK 40LEM-1043 / FTS2C LED TV panel V400HJ6-PE1 D40-M30 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.
