Technical description and composition of the TV SUPRA STV-LC22T400FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC22T400FL
Chassis / Version: HK-T.SP9202V50 V1N11 / V1N06
Panel: HM215WU1-500
LED driver (backlight): integrated into PSU
PWM LED driver: BIT3251
Power Supply (PSU): AY042D-1SF08-179
PWM Power: LD7536 (PWM 6PIN)
MainBoard: HK-T.SP9202V50
IC MainBoard: Flash 25Q32, MN88472, TDA1517P, NT5CB64M16FP-DH
Tuner: NONAME
Technical Specifications STV-LC22T400FL
SUPRA STV-LC22T400FL
General repair guidelines for TV LCD LED
Possible malfunctions
- The SUPRA STV-LC22T400FL TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
Failure in such cases should begin to be sought in the power supply circuits AY042D-1SF08-179. Then it is necessary to measure its output voltage and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for the presence of a possible short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM-controllers LD7536 (PWM 6PIN), in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the HK-T.SP9202V50 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its components Flash 25Q32, MN88472, TDA1517P, NT5CB64M16FP-DH. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by local heating of the chip.
If there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the NONAME tuner and update the software. The pulses from the I2C bus must be monitored using an oscilloscope.
Attention! Users and owners of STV-LC22T400FL TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC22T400FL, Main: HK-T.SP9202V50, Panel: HM215WU1-500
The appearance of the MainBoard HK-T.SP9202V50 is shown in the figure below:HK-T.SP9202V50
HK-T.SP9202V50 can be used in TVs:
SUPRA STV-LC24T400WL (Panel V236BJ1-P01), SUPRA STV-LC22T400FL (Panel HM215WU1-500).
The appearance of the power supply
Key Features of SUPRA STV-LC22T400FL:
Installed matrix (LED-panel) HM215WU1-500.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BIT3251 PWM controller.
The necessary supply voltages for all nodes of the TV SUPRA STV-LC22T400FL are formed by the power module AY042D-1SF08-179, or its analogs using microcircuits LD7536 (PWM 6PIN).
MainBoard - the main board (motherboard) is an HK-T.SP9202V50 module, using Flash 25Q32, MN88472, TDA1517P, NT5CB64M16FP-DH, and others.
The NONAME tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: BOE
Model: HM215WU1-500
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 200 cd / m²
Contrast Ratio: 600: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 16S4P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC22T400FL with LCD HM215WU1-500, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Dynamic contrast ratio 60000: 1 is achieved by special control LEDs work depending on the illuminated areas in the plot.In this model, an LED panel with an end arrangement of backlight LEDs is used - Edge LED.The TV features include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical resolution according to the standard 1080p (Full HD ). The input high-frequency or video signal is decoded in analog 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, MKV, Jpeg.
The power of the sound system 6 W (2x3 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI, USB. 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. The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: 580x415x110 mm.
Attention! The HM215WU1-500 panel of a SUPRA STV-LC22T400FL 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.