Technical description and composition of the TV SUPRA STV-LC2435FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC2435FL
Chassis / Version: V1J07
Panel: V236H1-LE2 Ver C1
LED driver (backlight): integrated into MainBoard
PWM LED driver: A8504
Power Supply (PSU): PW0500205 // PW52057B
PWM Power: LD7575BGS (PWM flyback)
MOSFET Power: SVD4N65F
MainBoard: JUG7.820.699-2
IC MainBoard: Flash: F40-100GCP Eeprom: 24LC32 Skaler: TSUMV26KU-LF Sound: 1517P
Tuner: CDT-3LC4l1-00
Technical Specifications STV-LC2435FL
SUPRA STV-LC2435FL
General repair guidelines for TV LCD LED
Repair of the SUPRA STV-LC2435FL TV should begin with a careful external inspection of all its constituent elements and modules. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If the power supply module malfunctions, external manifestations may be different, for example, the SUPRA STV-LC2435FL does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
If the SUPRA STV-LC2435FL TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the V236H1-LE2 Ver C1 panel is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their outputs, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
In cases of complex repairs of MB (SSB) and with the necessary skills and equipment, it may sometimes be necessary to replace its Flash chips: F40-100GCP Eeprom: 24LC32 Skaler: TSUMV26KU-LF Sound: 1517P and other possible malfunctioning components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before replacing the tuner CDT-3LC4l1-00, if there is no tuning for the channels, first you need to check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Once again, remind users! Attempts to self-repair a SUPRA STV-LC2435FL TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> STV-LC2435FL Ver:V1J07, Panel V236H1-LE2 Ver C1
The appearance of the MainBoard JUG7.820.699-2 is shown in the figure below:JUG7.820.699-2
JUG7.820.699-2 can be used on TVs:
AKAI LEA-22C05P (Panel CLAA215FA04), SUPRA STV-LC2435FL (Panel V236H1-LE2 Ver C1), SUPRA STV-LC2235FL (Panel M215HW01), SUPRA STV-LC2455FL (Panel V236H1-LE2), SUPRA STV-LC1935WL (Panel M185XW01 V6), SUPRA STV-LC2255FL (Panel M215HW01 V6).
The appearance of the power supply
Main features of the SUPRA STV-LC2435FL device:
Installed matrix (LED-panel) V236H1-LE2 Ver C1.
To power the backlight LEDs, a converter is used, combined with the main board JUG7.820.699-2, controlled by the A8504 PWM controller.
The necessary supply voltages for all nodes of the SUPRA STV-LC2435FL TV are generated by the PW0500205 power module or its analogs using LD7575BGS (PWM flyback) microcircuits and power switches of the SVD4N65F type.
MainBoard - the main board (motherboard) is a JUG7.820.699-2 module, using Flash: F40-100GCP Eeprom: 24LC32 Skaler: TSUMV26KU-LF Sound: 1517P and others.
The tuner CDT-3LC4l1-00 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V236H1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LED TV SUPRA STV-LC2435FL with LCD display V236H1-LE2, diagonal size 24 "(60 cm) 16: 9 format. The required brightness of the screen is 300 cd / m² LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 4000: 1. This model uses an LED panel with the end-mounted backlight LEDs - Edge LED. The TV's capabilities include viewing programs 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 generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 4 W (2x2 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, component, VGA, HDMI. 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.
The power consumed by the TV in the operating mode from the network is 40 watts.
Overall dimensions: 624x439x120 mm.
Mass of the TV: 6.3 kg.
Attention! The V236H1-LE2 Ver C1 panel of a SUPRA STV-LC2435FL 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.