Technical description and composition of the TV SUPRA STV-LC2255FL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC2255FL
Chassis / Version: V1K03
Panel: CLAA215FA04
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): PW52057 B
MainBoard: JUG7.820.969-3
IC MainBoard: CPU: MST6M181VS-LF-Z1
Tuner: CDT-3BP4I1-36
SUPRA LED
Model: STV-LC2255FL
Chassis / Version: JUG7.820.699-2
Panel: M215HW01 V6
LED driver (backlight): integrated into MainBoard
PWM LED driver: A8504
Power Supply (PSU): PW52057 B
MainBoard: JUG7.820.699-2
IC MainBoard: CPU: TSUMV26KE-LF; Flash EN25F40-100, EEPROM: 24LC32
Tuner: CDT-3LC4I1-00
Technical Specifications STV-LC2255FL
SUPRA STV-LC2255FL
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular SUPRA STV-LC2255FL, it is advisable to start with a careful external examination of internal and external elements. Based on visible external changes in the state of the components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before making the necessary measurements. 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.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the PW52057B power module is faulty and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, which is typical for certain SUPRA models. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. You should also check the rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself for no reason that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller, which can only be checked replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the SUPRA STV-LC2255FL does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the M215HW01 V6 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
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.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
The JUG7.820.699-2 motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power stabilizers of the microcircuit are working, a software update may be necessary.
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 - CPU: TSUMV26KE-LF; Flash EN25F40-100, EEPROM: 24LC32 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 you suspect a malfunction of the tuner CDT-3LC4I1-00, first of all, you need to make sure that there is a supply voltage on the corresponding output of the tuner.
Attention to users! Self-repair of a TV SUPRA STV-LC2255FL without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC2255FL, Main: JUG7.820.699-2, Panel: M215HW01 V6
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-LC2255FL device:
Installed matrix (LED-panel) M215HW01 V6.
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 formation of the necessary supply voltages for all nodes of the SUPRA STV-LC2255FL TV is carried out by the PW52057 power module, or its analogs.
MainBoard - the main board (motherboard) is a JUG7.820.699-2 module, using CPU chips: TSUMV26KE-LF; Flash EN25F40-100, EEPROM: 24LC32 and others.
The tuner CDT-3LC4I1-00 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: M215HW01 V6
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, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 3.8 / 1.2 (Tr / Td)
Frequency: 60Hz
Lamp Type: 10S8Px2CN WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins.
LED TV SUPRA STV-LC2255FL with LCD M215HW01, 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 3000: 1 is achieved by special control of the LEDs depending on the illumination of the plots in the plot, the model’s display technology uses LED LED backlighting. analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
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 35 watts.
Overall dimensions: 517x430x145 mm.
TV Weight: 4.5 kg.
Attention! The M215HW01 V6 panel of a SUPRA STV-LC2255FL 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.
