Technical description and composition of the TV SHARP LC-42LD265RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-42LD265RU
Chassis / Version: 715G6173
Panel: TPT420H2-HVN06
LED backlight: LBM420P0501
T-CON: 42T34-C01
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9902CGN
Power Supply (PSU): 715G6635-P01-000-003S
PWM Power: LD7591T, SSC9522S, A6069H
MOSFET Power: TK13A60D, TK10A50D
MainBoard: 715G6173-M01-000-004K
IC MainBoard: CPU: MT5561PUDT, NAND: TC58NVG0S3HTAI0, EEPROM: 24C64WP, SPI FLASH: MX25L12835F, AUDIO: TAS5721
Tuner: RE231TN
Technical Specifications LC-42LD265
SHARP LC-42LD265RU
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SHARP LC-42LD265RU does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module 715G6635-P01-000-003S. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of power switches (TK13A60D, TK10A50D) of converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) LD7591T, SSC9522S, A6069H, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 715G6173-M01-000-004K 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: MT5561PUDT, NAND: TC58NVG0S3HTAI0, EEPROM: 24C64WP, SPI FLASH: MX25L12835F, AUDIO: TAS5721 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 the absence of 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 tuner RE231TN. 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! For users and owners of LC-42LD265RU 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-serviceability of the device.
The appearance of the MainBoard 715G6173-M01-000-004K is shown in the figure below:715G6173-M01-000-004K
715G6173-M01-000-004K can be used in TVs:
SHARP LC-46LD265RU (Panel TPT460H1-HN04), SHARP LC-42LD265RU (Panel TPT420H2-HVN06).
The appearance of the power supply
Main features of the SHARP LC-42LD265RU device:
Installed matrix (LED-panel) TPT420H2-HVN06.
The matrix control uses the Timing Controller (T-CON) 42T34-C01.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9902CGN PWM controller.
The necessary supply voltages for all nodes of the SHARP LC-42LD265RU TV are generated by the power module 715G6635-P01-000-003S, or its analogs using microcircuits LD7591T, SSC9522S, A6069H and power switches of the type TK13A60D, TK10A50D.
MainBoard - the main board (motherboard) is a 715G6173-M01-000-004K module, using CPU chips: MT5561PUDT, NAND: TC58NVG0S3HTAI0, EEPROM: 24C64WP, SPI FLASH: MX25L12835F, AUDIO: TAS5721 and others.
The RE231TN tuner provides TV reception and channel tuning.
SHARP LC-42LD265 LED TV with TPT420H2-HVN06 LCD display, diagonal size 42 inches (107 cm) in 16: 9 format. The brightness of the screen 300 cd / m² is provided by LED backlight. In the manufacturing technology of the display of this model, LED backlighting is implemented.
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, JPEG.
The power of the sound system 16 W (2x8 W) provide 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, SCART, RGB, HDMI x2, USB, Ethernet (RJ-45). An output for connecting headphones is provided.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With a support of 662x429x170 mm, Without a support of 662x403x68 mm.
The mass of the TV: 11.8 kg.
Attention! The TPT420H2-HVN06 panel of the SHARP LC-42LD265 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.
