Technical description and composition of the TV SUPRA STV-LC24500WL, type of panel and applicable modules. The composition of the modules.SUPRA LED
Model: STV-LC24500WL
Chassis / Version: CV59L-E ver.V2N02 // V2M11
Panel: V236BJ1-LE1 Rev. C2 // V236BJ1-P01
LED driver (backlight): integrated into PSU
PWM LED driver: OB3350CP
MOSFET LED driver: SBR1060CTFP
Power Supply (PSU): HKL-240101 - B 6003050436 REV1.4
PWM Power: PWM SOT23-6 (- 73E23p)
MOSFET Power: 7N65FB
MainBoard: CV59L-E
IC MainBoard: CPU: TSUMV59XU-Z1, Spi FLASH: 25Q32
Tuner: CDT-3NP5I1-10
Technical Specifications STV-LC24500WL
SUPRA STV-LC24500WL
General repair guidelines for TV LCD LED
It is advisable to start repairing electronic devices, including the SUPRA STV-LC24500WL TV, with an external examination of its external and internal elements. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and decide on the direction of further troubleshooting even before the necessary measurements are taken. In some cases, faulty elements can be seen with the naked eye, for example, carbonized resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the STV-LC24500WL TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, only the stabilizer or power converter of the control processor may be malfunctioning, which is typical for some 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.
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 there is no image when you turn on the SUPRA STV-LC24500WL, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the V236BJ1-LE1 Rev.C2 panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
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.
When trying to identify 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 CV59L-E 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.
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: TSUMV59XU-Z1, Spi FLASH: 25Q32 which may require replacement with new ones. If the BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If you suspect a malfunction of the tuner CDT-3NP5I1-10, first of all, you need to make sure that the voltage of the varicaps (30-33V) is present on the corresponding output of the tuner, as well as other voltage supplying it.
Once again, we remind users of TV: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC24500WL, Main: CV59L-E, Panel: V236BJ1-LE1 Rev.C2
FIRMWARE FOR SPI FLASH -----------> SUPRA STV-LC24500WL, Main: CV59L-E, Panel: V236BJ1-P01 V2M11
The appearance of the MainBoard CV59L-E is shown in the figure below:
The MainBoard CV59L-E uses a multifunctional microprocessor type TSUMV59 with an integrated scaler and an external SPI Flash ROM of type 25Q32 (4Mb).
It is advisable to start repairing the motherboard by checking the + 5V voltage converters and the + 1.2V processor core power supply, as well as the + 3.3V linear voltage regulators and the 1.8V processor DDRAM internal power supply.
In the case of a working display backlight and the absence of an image, it is necessary to check the power of the panel (depending on the type, + 5V or + 12V), which can be measured directly on the LVDS connector. If, in the presence of all the supply voltages, the TV does not enter the operating mode, does not respond to the Remote Control and the control buttons, the SPI Flash software should be updated.
CV59L-E can be used in TVs:
FUSION FLTV-24L31B (Panel V236BK1-LE1 REV.C5), FUSION FLTV-22L31B (Panel LC215DT5A), SUPRA STV-LC24500WL (Panel V236BJ1-LE1 Rev.C2), SUPRA STV-LC22500FL (Panel LC215DT5A / HK215WLEDM-DH67H).
The appearance of the power supply
Main features of the SUPRA STV-LC24500WL device:
Installed matrix (LED-panel) V236BJ1-LE1 Rev. C2 or V236BJ1-P01.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OB3350CP PWM controller. As power elements of the LED driver, keys of the SBR1060CTFP type are used.
The necessary supply voltages for all nodes of the TV SUPRA STV-LC24500WL are generated by the HKL-240101 power module or its analogs using PWM SOT23-6 microcircuits (- 73E23p) and power switches of the 7N65FB type.
MainBoard - the main board (motherboard) is a CV59L-E module, using CPU chips: TSUMV59XU-Z1, Spi FLASH: 25Q32 and others.
The tuner CDT-3NP5I1-10 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236BJ1-LE1
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 521.471x293.184 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
SUPRA STV-LC24500WL LED TV with V236BJ1-LE1 LCD, 24 "(61 cm) diagonal size of 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60000: 1 is achieved by special control LEDs work depending on the illuminated areas in the plot.In this model, an LED panel with the end position of the backlight LEDs is used - Edge LED. The input high-frequency or video signal is decoded in analogue 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 acoustic system of sound 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, SCART, RGB, 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, 1360x768.
Overall dimensions: 562x389x177 mm.
Attention! The V236BJ1-LE1 Rev. C2 panel of a SUPRA STV-LC24500WL 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.