Technical description and composition of the TV SHARP LC-40FG3142, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-40FG3142 LC-40FG3142E
Chassis / Version: TP.MS3463S.PB711
Panel: JE400D3HD1UX-T
LED backlight: CRH-P40CA353504094BU-Rev1.0 B
T-CON: 1P-0149J00-4011
LED driver (backlight): integrated into MainBoard
PWM LED driver: SO-8 Package
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS3463S.PB711
IC MainBoard: CPU: MSD3463, SPI FLASH: 25Q64
Tuner: CDT-9NT372-RF01
Control: IR: IR-40CA
Technical Specifications LC-40FG3142E
SHARP LC-40FG3142
General repair guidelines for TV LCD LED
Possible malfunctions
- SHARP LC-40FG3142 does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In such cases, the AC / DC voltage converter, which is combined with the main board TP.MS3463S.PB711, is often faulty. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the 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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM SOT23-6 PWM chips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 TP.MS3463S.PB711 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its CPU components: MSD3463, SPI FLASH: 25Q64. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Before changing the tuner CDT-9NT372-RF01, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
TV users and owners should remember that attempts to self-repair a SHARP LC-40FG3142 TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
The appearance of MainBoard TP.MS3463S.PB711 is shown in the figure below:TP.MS3463S.PB711
Main features of the SHARP LC-40FG3142 device:
Installed matrix (LED panel) JE400D3HD1UX-T.
The matrix control uses the Timing Controller (T-CON) 1P-0149J00-4011.
To power the backlight LEDs, a converter is used, combined with the TP.MS3463S.PB711 main board, controlled by the SO-8 Package PWM controller. As power elements of the LED driver, keys of the TO-252 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a module TP.MS3463S.PB711, using CPU chips: MSD3463, SPI FLASH: 25Q64 and others.
The tuner CDT-9NT372-RF01 provides the reception of television programs and tuning to channels.
LED TV SHARP LC-40FG3142E with LCD JE400D3HD1UX-T, 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 scene. In LCD- The panel uses direct illumination with rear LEDs (relative to the screen) Direct LED.
The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), Xvid, 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 x2. 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 80 watts.
Overall dimensions: with stand 929x601x203 mm, without stand 929x552x92 mm.
TV Weight: 7.4 kg.
Attention! The JE400D3HD1UX-T panel of a SHARP LC-40FG3142E 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.
