Technical description and composition of the SUPRA STV-LC39T810FL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC39T810FL
Chassis / Version: V1L05
Panel: TC390FP01-A
LED backlight: TC390HJ01-R213-E0907R-L01, TC390HJ01-R213-E0907L-L01
T-CON: V390HJ1-XC01; CM2801B, 428RP (MSOP8), 24C128, CM501
LED driver (backlight): integrated into PSU
PWM LED driver: TL494G
MOSFET LED driver: AOD417, AOD413A
Power Supply (PSU): HTX-P14202001A
PWM Power: LD7751GR, FAN7530 (PFC)
MainBoard: T.MSD309.9B
IC MainBoard: W9751G6JB-25 X2, 25Q32S, AIC2857F, R2A15122
Tuner: XDTT-6F1C / T1146
Control: Remote: RC2B, IR: RMT123-1
STV-LC39T810FL Specifications
SUPRA STV-LC39T810FL
General recommendations for TV LCD LED repair
If the HTX-P14202001A power supply module fails, external manifestations may be different, for example, SUPRA STV-LC39T810FL does not turn on at all and there is no indication of the control lamps on the front panel. After checking the mains fuse and power elements of the primary circuit of the PSU, you should also check the absence of a short circuit in the loads of the secondary rectifiers.
It should be borne in mind that in the practice of repair, it is extremely rare for key transistors in switching power supplies (SMPS) to fail without reasons that should be looked for by checking other components, for example, a key breakdown can provoke faulty elements of damper circuits, or dried electrolytic capacitors or broken primary resistors power supply circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM regulator chip LD7751GR, FAN7530 (PFC) are subject to verification, which it is advisable to check by replacement.
If, when turning on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of a malfunction of the display backlight LEDs, or the LED driver (power converter of the TC390FP01-A panel backlight unit).
To check the health of the LEDs, as well as the contact connections in the ruler circuit, the panel must be disassembled.
Without a special current source, it is impossible to check the line of LEDs connected in series, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Typically, Chinese multimeters with a 9V power supply lightly light up one 3-volt LED if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or broken into the K / Z.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters 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 W9751G6JB-25 X2, 25Q32S, AIC2857F, R2A15122 elements requires the necessary training and professional skills in repairing modules at the component level. Problems associated with BGA soldering technologies can be diagnosed by the warm-up method.
Before changing the XDTT-6F1C / T1146 tuner, if it is not possible to tune to TV channels, you should make sure that there are supply voltages, which must be measured at the corresponding tuner terminals and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be monitored with an oscilloscope
Owners and users of the SUPRA STV-LC39T810FL TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Additional MainBoard RepairThe appearance of the MainBoard T.MSD309.9B is shown in the figure below:
T.MSD309.9B
The MainBoard T.MSD309.9B uses the MSD309B processor, DDRAM random access memory (RAM) in BGA design and SPI Flash ROM of 25Q32 type (4Mb).
It is advisable to start repairing the motherboard with checking the voltage converters and linear stabilizers necessary to provide power to the nodes in the operating and standby mode. The processor core is powered by + 1.5V. Also, the processor requires + 2.5V and + 3.3V voltages.
If the display backlight is working properly and there is no image, it is necessary to check the panel power supply (depending on the type, + 5V or + 12V), which is more convenient to measure directly at the LVDS connector. If, with all the supply voltages present, the TV does not go into operation, does not respond to the Remote Control and control buttons, you should update the SPI Flash firmware.
T.MSD309.9B can be used in TVs:
BBK LEM3242DT (Panel LC320EXN SDA1), BBK LEM3241FDT (Panel 32 "), BBK LEM2687FDT (Panel V260H1-LE1), IZUMI TLE32D400B (Panel V315H3-LE4), SUPRA STV-LC3245LF (Panel TC-315F1H2), SUPRA STV-LC39T820FL (Panel TC390FP01-B), SUPRA STV-LC46T810FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC39T810FL (Panel TC390FP01-A).
Additionally by PSU
The HTX-P14202001A power supply module uses a Power Factor Correction (PFC) circuit to eliminate multiple AC harmonics introduced by the device into the mains. The PFC unit is a step-up converter based on the FAN7530 PWM regulator, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the mains rectifier filter within a 50 Hz period. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the mains frequency), but by the elements of the converter. As a result, a change in the pulse amplitude (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The serviceability of the PFC unit is indicated by the presence of an increased voltage (about + 380V) in operating mode on the capacitor of the mains filter.
Main features of SUPRA STV-LC39T810FL device:
Installed matrix (LED panel) TC390FP01-A.
Matrix control uses Timing Controller (T-CON) V390HJ1-XC01 ;.
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by a TL494G PWM controller. The keys of the AOD417, AOD413A types are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC39T810FL TV is carried out by the HTX-P14202001A power module, or its analogs using LD7751GR, FAN7530 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a T.MSD309.9B module, using W9751G6JB-25 X2, 25Q32S, AIC2857F, R2A15122 and others.
Tuner XDTT-6F1C / T1146 provides reception of television programs and tuning to channels.
Information from an alternative source:
SUPRA STV-LC39T810FL Version V1L05
Panel type (matrix): TC390FP01-A
Motherboard: T.MSD309.9B, W9751G6JB-25 X2, 25Q32S, AIC2857F, R2A15122, Tuner: XDTT-6F1C / T1146
T-con: V390HJ1-XC01, CM2801B, 428RP (MSOP8) 24s128, CM501
PSU & Invertor: HTX-P14202001A, LD7751GR, FAN7530, TL494G, AOD417 x2, AOD413A
Remote control: RC2b
SUPRA LED TV STV-LC39T810FL with LCD TC390FP01-A, diagonal 39 "(99 cm) 16: 9. The required brightness of the screen 350 cd / m² is provided by LED backlight. Dynamic contrast ratio of 60,000: 1 is achieved by special control LED operation depending on the illumination of areas in the scene.The model's display technology uses LED LED backlighting.The TV's capabilities provide for viewing broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Input high-frequency or video signal decoded in analog systems PAL, SECAM, NTSC Graphic processing and digital signal formation occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, MPEG4, DivX, MKV, 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, component, SCART, RGB, VGA, HDMI x4, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768. The digital tuner is capable of receiving TV channels in DVB-T MPEG4 standards.
The power consumed by the TV in operating mode from the mains is 100 watts.
Overall dimensions: 888x608x277 mm.
TV weight: 13 kg.
Attention! The panel TC390FP01-A of the SUPRA STV-LC39T810FL LED TV 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.