Technical description and composition of the HAIER LE40K5000TF TV, type of panel and applicable modules. The composition of the modules.HAIER LED
Model: LE40K5000TF
Chassis / Version: 20174_V11
Panel: LSC400HN02 // V400HJ6-PE1
LED backlight: LED40D12-03 (A / B) 30340012206/7 // LED40D12-02 (A) PN: 30340012205
LED driver (backlight): integrated into PSU
PWM LED driver: OB3368AP
Power Supply (PSU): TV3902-ZC02-01 (D) 303C3902064
PWM Power: OB5269CP
MainBoard: 20-ASEU174-11-0X 20174_V11
IC MainBoard: CPU, NAND Flash: S34ML04G200TFI00, DDR, AUDIO
Tuner: NoName
Technical Specifications LE40K5000TF
HAIER LE40K5000TF
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The HAIER LE40K5000TF TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the TV3902-ZC02-01 power supply module. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers OB5269CP, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound and all other functions work. Sometimes when you turn on the image for a second appears and disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be found in the malfunction of the LEDs, in the violation of the contact connections of the LED strips, or in the provision of their power (LED-driver).
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 20-ASEU174-11-0X 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU, NAND Flash, DDR, AUDIO which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the NoName tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention TV owners! Self-repair attempts by HAIER LE40K5000TF are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard 20-ASEU174-11-0X is shown in the figure below:20-ASEU174-11-0X
The appearance of the power supply
Key Features of HAIER LE40K5000TF:
Installed matrix (LED-panel) LSC400HN02 or V400HJ6-PE1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3368AP PWM controller.
The necessary supply voltages for all nodes of the TV HAIER LE40K5000TF are generated by the TV3902-ZC02-01 power module, or its analogs using OB5269CP microcircuits.
MainBoard - the main board (motherboard) is a 20-ASEU174-11-0X module, using CPU chips, NAND Flash: S34ML04G200TFI00, DDR, AUDIO and others.
The NoName tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC400HN02-W
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: SVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare, Hard coating (2H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 4000: 1
Display Colors: 1.07B (10-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
HAIER LE40K5000TF TV with LSC400HN02 LCD, 40 "(102 cm) diagonal, 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 3000000: 1 is achieved by special control of the LEDs. In manufacturing technology The LED TV backlight is implemented on the screen of this TV model. p (Full HD).
The LE40K5000TF is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The 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, JPEG. Stereo sound is realized by two built-in 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, component, SCART, VGA, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi. 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With stand 904x554x211 mm, Without stand 904x525x69 mm.
Attention! The LSC400HN02 panel of the HAIER LE40K5000TF 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.
