Technical description and composition of the SUPRA STV-LC2625WL TV, panel type and modules used. The composition of the modules.SUPRA LED
Model: STV-LC2625WL
Chassis / Version: Ver: V2K03
Panel: TC260B306
LED driver (backlight): HQ-LED31C3
Power Supply (PSU): CEM-1 REV1.1
MainBoard: T.MS6M48.7A 10342
IC MainBoard: MST6E48RHS-LF-ZLSJ; SPI Flash: 26Q32BVC
Tuner: ET-6TIE-LF-108W-a
STV-LC2625WL Specifications
SUPRA STV-LC2625WL
General recommendations for TV LCD LED repair
Repair of the SUPRA STV-LC2625WL V2K03 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. Swollen electrolytic or sintered capacitors, charred resistors, ring cracks in the soldering of the element terminals - all this can significantly help the master to determine the causes and consequences of the malfunctions in the TV.
If the TV does not turn on, none of the indicators on its front panel are on or blinking. Also, if the TV does not respond to the remote control and buttons, does not emit any sounds and any signs of operability when turned on, there is a certain probability that the CEM-1 REV1.1 power supply module is faulty and needs repair. Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain SUPRA models. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, in case of their breakdown, it is necessary to look for a malfunction in the stabilization circuits, checking electrolytic capacitors, semiconductor devices and resistors in the primary circuit. The reason may be a malfunction of the PWM regulator microcircuit, which can only be checked by replacing it with a new or known good one.
If the SUPRA STV-LC2625WL TV does not have a picture, but there is sound, a malfunction in the LED backlight circuits of the TC260B306 panel is likely. 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 an overestimated ESR.
To check the health of the LEDs, as well as the contact connections in the ruler circuit, the panel must be disassembled.
It is impossible to check the LED bars for a break 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.
Diagnostics and repair of the T.MS6M48.7A 10342 motherboard is carried out by checking the functionality of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Complex repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MST6E48RHS-LF-ZLSJ, 26Q32BVC. Malfunctions in BGA chips are usually easy to detect by warm-up.
Before replacing the ET-6TIE-LF-108W-a tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals, including the supply of varicaps (30-33V).
Attention to users! Self-repair of the SUPRA STV-LC2625WL TV without appropriate qualifications and experience can lead to its complete non-repairability!
The appearance of the MainBoard T.MS6M48.7A is shown in the figure below:T.MS6M48.7A
T.MS6M48.7A can be used in TVs:
SUPRA STV-LC3244FL (Panel 1080p Full HD 1920x1080), SUPRA STV-LC2625WL (Panel TC260B306), SUPRA STV-LC3225WL (Panel TC315B601), SUPRA STV-LC2644WL (Panel T260XW06 V.4), SUPRA STV-LC4225AFL (Panel TC420F115), SUPRA STV-LC3225LF (Panel V315H4-LE2).
Main features of SUPRA STV-LC2625WL device:
Installed matrix (LED panel) TC260B306.
The LED driver HQ-LED31C3 is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SUPRA STV-LC2625WL TV is carried out by the CEM-1 power module, or its analogs.
MainBoard - the main board (motherboard) is a T.MS6M48.7A module, using MST6E48RHS-LF-ZLSJ microcircuits; SPI Flash: 26Q32BVC and others.
The ET-6TIE-LF-108W-a tuner provides reception of television programs and tuning to channels.