Technical description and composition of the TV SHARP LC-42LE320RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-42LE320RU
Panel: T420HW07 V.1
T-CON: 31T12-C04 T315HW05 V0 / V1 AUO-12403
LED driver (backlight): 715G4171-P01-W20-003U
PWM LED driver: FAN6961 (8)
Power Supply (PSU): 715G4171-P01-W20-003U
PWM Power: SG6961 (PFC), L6599D (PWM Resonant)
MOSFET Power: TF12N50
MainBoard: 715G3805-MU1-000-005X
IC MainBoard: TPA3110D2, 03A2X9WG4
Tuner: FH2607
Control: LCDTV GJ220
Technical Specifications LC-42LE320
SHARP LC-42LE320RU
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the SHARP LC-42LE320RU TV, as well as the external elements of the case. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Sometimes the SHARP LC-42LE320RU TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the 715G4171-P01-W20-003U common power supply module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). 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. Options are TF12N50.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip SG6961 (8) L6599D (16) SG6961 (8 ) or breakage of resistors in its harness.
If, when you turn on the TV, the image appears and immediately disappears, or is missing initially when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (T420HW07 V.1 backlight LED power converter (T-CON T315HW05 V0 / V1 AUO -12403)). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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 will be required, and ideally, a current source.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing TPA3110D2, 03A2X9WG4 elements requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
In cases where there is no tuning to the local television channels, you should make sure that the voltage of the varicaps (30-33V) and other supply voltages on the terminals of the tuner FH2607 are present.
Attention! For users and owners of LC-42LE320RU TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service Manual with Schematic Diagram 336 pages 2010 model LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320.
schematic manual ------------------> Sharp LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
LED TV SHARP LC-42LE320 with LCD T420HW07, diagonal size 42 "(107 cm) in 16: 9 format. The brightness of the screen is 450 cd / m² with LED backlight. This model uses backlight with end-mounted LEDs (relative to the screen) - 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 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, MPEG4, Xvid, DivX, 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, audio x3, component, SCART x2, RGB, VGA, HDMI x3, USB, RS-232. 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 97 watts.
Overall dimensions: with stand 1019x669x260 mm, without stand 1019x631x45 mm.
Mass of the TV: 16.2 kg.
Attention! The T420HW07 V.1 panel of the SHARP LC-42LE320 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. The LC-42LE320RU model uses a 715G4171-P01-W20-003U power supply unit using the PFC (Power Factor Correction) node - an active filter of higher harmonics of the consumed current. In fact, this is a step-up converter based on the SG6961 PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
Main features of the SHARP LC-42LE320RU device:
Installed matrix (LED-panel) T420HW07 V.1.
The matrix control uses the Timing Controller (T-CON) 31T12-C04.
The LED driver 715G4171-P01-W20-003U is used to power the backlight LEDs, it is controlled by the FAN6961 PWM controller (8).
The necessary supply voltages for all nodes of the SHARP LC-42LE320RU TV are generated by the 715G4171-P01-W20-003U power module, or its analogs using SG6961 (PFC), L6599D (PWM Resonant) microcircuits and TF12N50 power switches.
MainBoard - the main board (motherboard) is a module 715G3805-MU1-000-005X, using microchips TPA3110D2, 03A2X9WG4 and others.
The FH2607 tuner provides television reception and channel tuning.
Information from an alternative source:
SHARP LC-42LE320RU
Panel Type (Matrix): T420HW07 V.1
Motherboard: 715G3805-M1C-000-005B (WK: 1035), HY27US08281A (sticker V2.03), W9751G6JB-18 (x2), SI2163-GM, TPA3110D2, Tuner: FH2607
T-con: T315HW05 V0 / V1 CTRL BD (31T12-C04), AUO-12403, RM5101, TPS65161, AAT1910, 715G4057-T01-000-005Y PTPFAPA2, PSU &
LED Driver: 715G4171-P01-W20-003U, TNY277PN, L6599D, TF12N50 x2, FAN6961
Remote control: GJ220 part1, part2
Additional technical information about the panel:
Brand: AUO
Model: T420HW07 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
