Technical description and composition of the IZUMI TLE26H400B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE26H400B
Chassis / Version: MST6M181VS-V3.0
Panel: T260XBNO V.0
MainBoard: MST6M181VS-V3.0
IC MainBoard: FLASH: U42 25Q32BVS
Tuner: CDT-3BP512-36
Technical Specifications TLE26H400B
IZUMI TLE26H400B
General repair guidelines for TV LCD LED
TV IZUMI TLE26H400B, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect 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.
In cases when the IZUMI TLE26H400B TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up and do not blink and there are no sounds and no signs of operability at all, the power module is most likely faulty or there is no processor power on motherboard (a typical defect of some IZUMI TVs). 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. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the IZUMI TLE26H400B does not have an image, but there is sound, the backlight LEDs on the T260XBNO V.0 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
In cases of attempts to repair the motherboard MST6M181VS-V3.0, it is necessary to check the performance 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.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - FLASH: U42 25Q32BVS. Defective components should be replaced.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner CDT-3BP512-36, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
We recommend the owners of the TLE26H400B TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> IZUMI TLE26H400B, Main: MST6M181VS-V3.0, Panel: T260XBNO V.0
In cases where there is a malfunction in the SPI FLASH software and a microcircuit manufacturer Winbond is installed, we recommend replacing it with a new one. Sometimes faulty SPI Winbond microcircuits can be restored for a while after being heated by a hairdryer or a lighter, which makes it possible to read the properly installed software.
Repair MainBoardThe appearance of the MainBoard MST6M181VS-V3.0 is shown in the figure below:
MST6M181VS-V3.0
MST6M181VS-V3.0 can be used in TVs:
IZUMI TLE32H410M (Panel V315B5-LE3 REV.C2), IZUMI TLE26H400B (Panel T260XBNO V.0), IZUMI TLE42F400B (Panel V420H2-LE3 REVC3).
Main features of the IZUMI TLE26H400B device:
Installed matrix (LED-panel) T260XBNO V.0.
The required supply voltage for all nodes of the TV IZUMI TLE26H400B provides a switching power supply.
MainBoard - the main board (motherboard) is an MST6M181VS-V3.0 module, using FLASH chips: U42 25Q32BVS and others.
The tuner CDT-3BP512-36 provides the reception of television programs and tuning to channels.
