Technical description and composition of the HARPER 43F575T TV, panel type and modules used. The composition of the modules.HARPER LED
Model: 43F575T
Chassis / Version: TP.MS3663S.PB801
Panel: PT430CT01-1 HK430WLEDM-JH08H
LED backlight: 261501000040
T-CON: PT430CT01-1-XC-1 PT430CT01-1-XR-1
LED driver (backlight): integrated into MainBoard
PWM LED driver: 8pin
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: TO-220
MainBoard: TP.MS3663S.PB801
IC MainBoard: SPI Flash: MX25L6405
Tuner: CDT-9NT372-RF01 & SAT
Specifications 43F575T
HARPER 43F575T
General recommendations for TV LCD LED repair
Possible manifestations of defects
- TV HARPER 43F575T does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.
A malfunction in such cases should be looked for in the elements of the power source - the mains voltage converter (AC / DC), which is located on the MainBoard TP.MS3663S.PB801. Its output voltages should be measured, and in their absence, check the serviceability of the power switches (TO-220) of the converters and rectifier diodes for the probability of a short circuit.
In the event of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor in the source of the key usually breaks off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) PWM SOT23-6, if they have no visible damage to the case and an open short circuit between the pins, are usually checked by replacing.
- No picture, sound, all other TV functions 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 of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.
- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the TP.MS3663S.PB801 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Repair of the board and replacement of SPI Flash: MX25L6405 microcircuits are made if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by warming up.
The malfunction of the CDT-9NT372-RF01 & SAT tuner is established after checking the software and all supply voltages at its terminals. The I2C bus data exchange between the tuner and the processor can be monitored with an oscilloscope.
Users and owners of TVs should remember that attempts to self-repair the HARPER 43F575T TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> HARPER 43F575T, Main: TP.MS3663S.PB801, Panel: PT430CT01-1 HK430WLEDM-JH08H
The appearance of MainBoard TP.MS3663S.PB801 is shown in the figure below:TP.MS3663S.PB801
The main features of the HARPER 43F575T device:
Installed matrix (LED panel) PT430CT01-1 HK430WLEDM-JH08H.
Matrix control uses the Timing Controller (T-CON) PT430CT01-1-XC-1.
To power the backlight LEDs, a converter combined with the main board TP.MS3663S.PB801 is used, controlled by an 8pin PWM controller. TO-252 switches are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using SOT23-6 PWM microcircuits and TO-220 type power switches.
MainBoard - the main board (motherboard) is a TP.MS3663S.PB801 module, using SPI Flash chips: MX25L6405 and others.
The CDT-9NT372-RF01 & SAT tuner provides reception of television programs and tuning to channels.
TV HARPER 43F575T with LCD display PT430CT01-1, 42.5 "(108 cm) diagonal 16: 9. The required brightness of the screen of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 90,000: 1 is achieved by a special control of the LEDs. LED backlighting technology for this TV model.The design and technical capabilities of the TV provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) Supported media file formats: MP3, MPEG4, JPEG ...
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI x3, USB. A headphone output is provided.
The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV operating in mains mode is 100 W.
Dimensions: with stand 971x616x213 mm, without stand 971x565x77 mm.
TV weight: 6.8 kg.
Attention! Panel PT430CT01-1 HK430WLEDM-JH08H LED TV HARPER 43F575T is an expensive and unreliable element.
Do not allow any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV non-repairable.