Technical description and composition of the SONY KDL-40U2530K TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40U2530K
Chassis / Version: SE1T
Panel: LTA400WT-L05
T-CON: 400WSC4LV0.4
Inverter (backlight): LJ97-00860A
Power Supply (PSU): 1-870-686-13 - A-1189-416-A - A1189416A G2
PWM Power: FA5501AN (PFC), MCZ3001DB, MM1431ATT, STR-A6169, TDA7495S
MainBoard: 1-872-686-11 A-1242-773-A BDTR-2 A1242773A
IC MainBoard: TDA9974AHS / 8/12, HY27US0828A1, LVC541A G841325, 4776, PA8718, LVX8053, LVXT4053
Tuner: BTP-HC401
Control: RM-ED007
Appearance
SONY KDL-40U2530K
General recommendations for repairing TV LCD
Repair SONY KDL-40U2530K must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including those of the body. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the G2 A1189416A power supply module fails, the external manifestations may be different, for example, the SONY KDL-40U2530K does not turn on at all and there is no indication of the control lights on the front panel. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
In cases where the SONY KDL-40U2530K TV has lost an image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repair of the LJ97-00860A inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
On the BDTR-2 A1242773A motherboard, in the event of a malfunction, you should first check the performance of all the power stabilizers of the microcircuits and, if necessary, update the software (software).
It should be remembered! Attempts to repair the SONY KDL-40U2530K TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
The appearance of MainBoard 1-872-686-11 is shown in the figure below:1-872-686-11
1-872-686-11 can be used in televisions:
SONY KDL-26P2530 (Panel T315XW02 V1), SONY KDL-32P2520 (Panel T315XW02 V.1.), SONY KDL-32P2530 (Panel T315XW02 V.1), SONY KDL-40P2530 (Panel LTA400WT-L05 1-802-386-21), SONY KDL-40U2520 (Panel LTA400WT-L05), SONY KDL-40U2530K (Panel LTA400WT-L05).
The appearance of the power supply
Main features of the device SONY KDL-40U2530K:
Installed matrix (LCD-panel) LTA400WT-L05.
The matrix control uses the Timing Controller (T-CON) 400WSC4LV0.4.
To power the backlight used inverter LJ97-00860A.
The necessary supply voltages for all nodes of the SONY KDL-40U2530K TV are generated by the power module 1-870-686-13, or its analogs using the FA5501AN (PFC), MCZ3001DB, MM1431ATT, STR-A6169, TDA7495S microcircuits.
MainBoard - the main board (motherboard) is a module 1-872-686-11, using TDA9974AHS / 8/12, HY27US0828A1, LVC541A G841325, 4776, PA8718, LVX8053, LVXT4053 and others.
The BTP-HC401 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400WT-L05
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.168x497.664 mm
Display Colors: 16.7M (8-bit), CIE1931 72%
Frequency: 60Hz
Lamp Type: CCFL