Technical description and composition of the TV SHARP LC-40UG7252E, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-40UG7252E
Chassis / Version: T.MS6488E.U703
Panel: LSC400FN05-8
LED backlight: RF-AJ400S30-0801S-12 A1
LED driver (backlight): integrated into PSU
Power Supply (PSU): PW.168W2.801
MOSFET Power: TO-220
MainBoard: T.MS6488E.U703
IC MainBoard: NAND: MX30LF4G18AC-TI
Tuner: CDT-9NT372RF-10
Technical Specifications LC-40UG7252E
SHARP LC-40UG7252E
General repair guidelines for TV LCD LED
Possible malfunctions
- The SHARP LC-40UG7252E TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Often in such cases, the PW.168W2.801 power module is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (TO-220) and rectifier diodes of the converters for a probable 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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
As a rule, in such cases there is no display backlight. Often the cause is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver is malfunctioning.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the T.MS6488E.U703 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - NAND: MX30LF4G18AC-TI and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner CDT-9NT372RF-10 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a TV SHARP LC-40UG7252E without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of MainBoard T.MS6488E.U703 is shown in the figure below:T.MS6488E.U703
The appearance of the power supply
Main features of the SHARP LC-40UG7252E device:
Installed matrix (LED-panel) LSC400FN05-8.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SHARP LC-40UG7252E TV are generated by the PW.168W2.801 power module or its analogs using TO-220 type power switches.
MainBoard - the main board (motherboard) is a module T.MS6488E.U703, using NAND chips: MX30LF4G18AC-TI and others.
The tuner CDT-9NT372RF-10 provides the reception of television programs and tuning to channels.
LED TV SHARP LC-40UG7252E with LCD LSC400FN05-8, diagonal size 40 "(102 cm) 16: 9 format. Dynamic contrast ratio of 1,000,000: 1 is achieved by controlling the operation of LEDs (LED) depending on the brightness of the plot. In the manufacturing technology The display of this model is implemented LED (LED) backlight.
You can watch movies in the highest possible quality UHD with a resolution of 3840x2160 pixels in the standard 4K UHD, HDR. Image processing is performed using state-of-the-art High Dynamic Range (HDR) technology with an extended range of brightness gradations.
The LC-40UG7252E TV is equipped with SMART software, as well as the ability to work with applications and on the Internet. Connecting to a network can be done via Wi-Fi.
Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), MKV, JPEG.
The power of the sound system 20 W (2x10 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB x3, Ethernet (RJ-45), Wi-Fi, WiDi, Miracast. 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.
The power consumed by the TV from the network in operating mode is 110 watts.
Overall dimensions: with stand 921x576x199 mm, without stand 921x542x84 mm.
TV Weight: 8 kg.
Attention! The LSC400FN05-8 panel of the SHARP LC-40UG7252E 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.