Technical description and composition of the TV SHARP LC-40LE540RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-40LE540RU
Panel: LK400D3LB43C
T-CON: DUNTK4593TP
LED driver (backlight): integrated into PSU
PWM LED driver: MAP3222S
MOSFET LED driver: AOD450, MDD4N20Y
Power Supply (PSU): FSP148-3FS03 RDENCA441WJQZ LC-46LE730E
PWM Power: L6599 (PWM Resonant), SCY99102 (PFC), VIPer27L (Standby),
MOSFET Power: KF5N60, TK6A60D
MainBoard: QPWBXF915WJN2 DUNTKF915WE06
IC MainBoard: CPU: IXD491WJ; DRAM: K4B2G1646C-HCH9; SOUND: STA333BW
Tuner: TDSV-G001D
Control: URC7130
Technical Specifications LC-40LE540
SHARP LC-40LE540RU
General repair guidelines for TV LCD LED
It is advisable to start repairing the SHARP LC-40LE540RU TV with a careful external examination of both internal and external elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In case of a power supply module malfunction, external manifestations may be different, for example, the SHARP LC-40LE540RU does not turn on at all and there is no indication of the control lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If the SHARP LC-40LE540RU has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LK400D3LB43C panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
The DUNTKF915WE06 QPWBXF915WJN2 motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
The failure of the TOSV-G001D tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
It should be remembered! Attempts to repair the SHARP LC-40LE540RU TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual and sсhematic diagram LC-40LE540RU
Service Manual with Schematic Diagram 94 pages 2012 models LC-40LE540E, LC-40LE540EK, LC-40LE540EV, LC-40LE540RU, LC-46LE540E, LC-46LE540EK, LC-46LE540EV, LC-46LE540RU.
The appearance of the MainBoard QPWBXF915WJN2 is shown in the figure below:QPWBXF915WJN2
QPWBXF915WJN2 can be used in TVs:
SHARP LC-40LE540RU (Panel LK400D3LB43C), SHARP LC-40LE730RU (Panel LK400D3LB43 R1LK400D3LB43C), SHARP LC-46LE540RU (Panel LK460D3LB33C).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the RDENCA441WJQZ module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the SCY99102 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SHARP LC-40LE540RU device:
Installed matrix (LED panel) LK400D3LB43C.
The matrix control uses the Timing Controller (T-CON) DUNTK4593TP.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the MAP3222S PWM controller. As power elements of the LED driver, keys of the type AOD450, MDD4N20Y are used.
The necessary supply voltages for all nodes of the SHARP LC-40LE540RU TV are generated by the FSP148-3FS03 power supply module or its analogs using L6599 (PWM Resonant), SCY99102 (PFC), VIPer27L (Standby) microcircuits, and power switches of the KF5N60, TK6A60D type.
MainBoard - the main board (motherboard) is a QPWBXF915WJN2 module, using CPU chips: IXD491WJ; DRAM: K4B2G1646C-HCH9; SOUND: STA333BW and others.
The TDSV-G001D tuner provides television reception and channel tuning.
Information from an alternative source:
SHARP LC-40LE540RU
Panel Type (Matrix): LK400D3LB43
Motherboard: DUNTK915
T-con: DUNTK4593TP
PSU: RDENCA441WJQZ LC-46LE730E
Remote control: URC7130
LED TV SHARP LC-40LE540 with LCD LK400D3LB43C, diagonal size 40 "(102 cm) 16: 9 format. The brightness of the screen 400 cd / m² is provided by LED (LED) backlight. Contrast, as the ratio of maximum brightness to minimum, is 5000: 1. In this model, the backlight with the end position of the LEDs (relative to the screen) is used - Edge 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).
The LC-40LE540 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. 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, Xvid, DivX, MKV, JPEG.
The power of the acoustic system of sound 20 W (2x5 + 10 W) provide 3 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, audio x2, component, SCART, RGB, VGA, HDMI x4, USB x3, Ethernet (RJ-45). 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV from the network in operating mode is 89 watts.
Overall dimensions: with stand 947x630x242 mm, without stand 947x579x40 mm.
TV Weight: with stand: 14.4 kg, without stand: 12.2 kg.
Attention! The LK400D3LB43C panel of the SHARP LC-40LE540 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.