Technical description and composition of the SUPRA STV-LC40ST2000F TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC40ST2000F
Chassis / Version: TP.MS338E.PB803
Panel: C400F17-E61-C
LED backlight: LB-C400F16-E60-C-C01-XRD1
T-CON: V400HJ6-PE1 Rev. C3
LED driver (backlight): integrated into PSU
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6 & PFC
MOSFET Power: TO-252
MainBoard: TP.MS338E.PB803
IC MainBoard: MSB102KT, EMMC: THGBMDG5D1LBAIL, SPI: 25L4006E
Tuner: NoName
STV-LC40ST2000F Specifications
SUPRA STV-LC40ST2000F
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SUPRA STV-LC40ST2000F TV does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
A malfunction in such cases, first of all, should be looked for in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the MainBoard TP.MS338E.PB803 main board. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency in the short-circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse is usually cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
Usually, in such cases, a malfunction is detected in the nodes of the backlight of the LED panel. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- 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.MS338E.PB803 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).
If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the NoName tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Owners and users of the SUPRA STV-LC40ST2000F 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!
The appearance of MainBoard TP.MS338E.PB803 is shown in the figure below:TP.MS338E.PB803
Main features of SUPRA STV-LC40ST2000F device:
Installed matrix (LED panel) C400F17-E61-C.
Matrix control uses the Timing Controller (T-CON) V400HJ6-PE1.
A converter combined with a power supply is used to power the backlight LEDs.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using PWM SOT23-6 & PFC microcircuits and TO-252 power switches.
MainBoard - the main board (motherboard) is a TP.MS338E.PB803 module, using MSB102KT microcircuits, EMMC: THGBMDG5D1LBAIL, SPI: 25L4006E and others.
Tuner NoName provides reception of television programs and tuning to channels.
SUPRA LED TV STV-LC40ST2000F with LCD C400F17-E61-C, diagonal 40 "(102 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 120,000: 1 is achieved special control of the LEDs depending on the illumination of the areas in the scene.The LED-panel uses direct pixel backlighting with rear-positioned LEDs - Direct LED.The TV capabilities 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).
STV-LC40ST2000F has built-in SMART software and pre-installed Android Operating System. Internet connection can be made via Wi-Fi wireless connection. Supported media file formats: MP3, MPEG4, MKV, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
An external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi. A headphone output is provided. The digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 906x572x196 mm, without stand 906x520x87 mm.
Attention! SUPRA STV-LC40ST2000F LED TV panel C400F17-E61-C 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.