Technical description and composition of the TV SUPRA STV-LC2277FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC2277FL
Chassis / Version: V6L10
Panel: LM215DA-T01 // HK215WLEDM-DH24H
LED driver (backlight): integrated into PSU
PWM LED driver: OB3362RP
Power Supply (PSU): HKC-PL01
PWM Power: SG6848 (6pin - AExxx)
MOSFET Power: SVF7N65F
MainBoard: T.VST29.61C 12296
IC MainBoard: 25Q32TVSIG, YD1517P, TSUMV59XU-Z1, DC-DC GG2W (5)
Tuner: CDT-3SP5I2-36
Technical Specifications STV-LC2277FL
SUPRA STV-LC2277FL
General repair guidelines for TV LCD LED
SUPRA STV-LC2277FL, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. Sometimes, according to visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
Sometimes the SUPRA STV-LC2277FL TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the HKC-PL01 common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors SVF7N65F in the primary circuit.
In most cases, key breakdowns in switching power supplies (IIPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM AEVGB (6) SG6848 from the manufacturer.
If the SUPRA STV-LC2277FL TV does not have an image, but there is sound, there may be a malfunction in the LED backlight circuits of the LM215DA-T01 HK215WLEDM-DH24H panel. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for excessive ESR.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
In cases of attempts to repair the motherboard T.VST29.61C 12296, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - 25Q32TVSIG, YD1517P, TSUMV59XU-Z1, DC-DC GG2W (5) and replace failed chips with new ones. Some malfunctions can be associated with the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner CDT-3SP5I2-36 may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention to the owners! Attempts at self-repair of the SUPRA STV-LC2277FL TV are not recommended by the manufacturer and can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2277FLD, Main: CV181L-A, Spi Flash: W25Q32, Panel: BOE HM215WU3-100
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2277FL (V6L10) Main: T.VST29.61C 12296, Panel: LM215DA-T01, Power: HKC-PL01 REV:3.0, Tuner: CDT-3SP512-36, CPU:TSUMV59XU-Z1, Sound:1517P.
When installing chips like SG6848T (AAH ..) instead of analogs SG6849 ... (AE ..., BB ...), it is necessary to have a frequency-setting resistor from the third output of the chip to the case. Denomination 95-100kOhm.
Of the possible replacements, we can recommend the most popular LD7535, LD7550, OB2262, OB2273 and other available analogues. The use of pin 3 must be clarified in the documentation.
If a failure occurs in the SPI FLASH software from Winbond, we recommend that you replace the chip with a new one. Often, unreadable Winbond microcircuits can temporarily restore their functionality after a strong temperature exposure, for example, heating with a soldering station or a lighter. Sometimes this is enough to read its regular contents.
To reduce the backlight current in LED drivers with an OB3362RP (TSOP16) controller, increase the total resistance of the resistors from pin 5 (ISET) to the chassis. The maximum current in each of the four channels (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 3000 * 1.2V / Rset.
The appearance of MainBoard T.VST29.61C is shown in the figure below:T.VST29.61C
T.VST29.61C can be used in TVs:
GOLDSTAR LT-24A300F (Panel M236HGE-P01), GoldStar LD-19A300R (Panel V185B1-PE1), SUPRA STV-LC19410WL (Panel M185BGE-P02 HK185WLEDM-CH15H), SUPRA STV-LC2277FL (Panel LM215DA-T01), SUPRA STV-LC22410WL (Panel LM216DA-T01), SUPRA STV-LC24410FL (Panel M236H1-P01 HK236WLEDM-CH84H ).
The appearance of the power supply
Main features of the SUPRA STV-LC2277FL device:
Installed matrix (LED panel) LM215DA-T01 or HK215WLEDM-DH24H.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3362RP PWM controller.
The necessary supply voltages for all nodes of the TV SUPRA STV-LC2277FL are generated by the power module HKC-PL01, or its analogs using microcircuits SG6848 (6pin - AExxx) and power switches of the type SVF7N65F.
MainBoard - the main board (motherboard) is a T.VST29.61C module, using 25Q32TVSIG, YD1517P, TSUMV59XU-Z1 chips, DC-DC GG2W (5) and others.
The tuner CDT-3SP5I2-36 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: PANDA
Model: LM215DA-T01
Type: a-Si TFT-LCD, CELL
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC2277FL with LCD HK215LEDM-BH, diagonal size 22 "(56 cm) 16: 9 format. The required brightness of the screen 250 cd / m² is provided by LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 700: 1. Dynamic contrast ratio of 14000: 1 is achieved by special control of the LEDs depending on the lighting in the plot.In this model, an LED-panel with the end-face arrangement of the backlight LEDs is used - Edge LED. Resolution 1920x1080 pixels in graphic decomposition 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, 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. An output for connecting headphones is provided. 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, 1360x768, 1920x1080.
The power consumed by the TV in the operating mode from the network is 50 watts.
Overall dimensions: 536x387x187 mm.
Mass of the TV: 3.7 kg.
Attention! The HK215LEDM-BH 1H panel of a SUPRA STV-LC2277FL 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.