Technical description and composition of the TV SONY KDL-40P2530, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40P2530
Chassis / Version: SE-1
Panel: LTA400WT-L05 1-802-386-21
T-CON: 400WSC4LV0.4
Inverter (backlight): KLS-400W2 rev06
PWM Inverter: BA2901F (14), BD9886FV (28)
MOSFET Inverter: NG51AF NG32BD NG49AL
Trans Inverter: IT-136 073K
Power Supply (PSU): 1-870-686-13 - A-1189-416-A - A1215679A G2
PWM Power: FA5501AN (PFC), STR-A6169 (8), MCZ3001DB (18)
MOSFET Power: 2SK3797 2SK3469
MainBoard: 1-872-686-11 A-1242-773-A BDTR-2 BOARD
IC MainBoard: TDA9974AHS / 8/12, HY27US0828A1, LVC541A G841325, 4776, PA8718, LVX8053, LVXT4053
Tuner: FSS BTP-HC401 8-597-585-10
Control: RM-ED007
Technical Specifications KDL-40P2530K
SONY KDL-40P2530
General recommendations for repairing TV LCD
TV SONY KDL-40P2530, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. 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.
In cases when the SONY KDL-40P2530 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the G2. power supply module is most likely faulty .- SE-1 or, which is much less common, there is no processor power on the motherboard. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch 2SK3797 2SK3469 for the possibility of an avalanche or thermal breakdown.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip FA5501AN-D1-TE1 (8) STR-A6169 (8) MCZ3001DB (18), which can only be checked by replacing it with a new or obviously working one.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SONY KDL-40P2530 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter 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 inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
In cases of attempts to repair the motherboard * A-1242-773-A BDTR-2 BOARD, it is necessary to check the operability of the power supply circuits of the microcircuits and, if possible, update the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TDA9974AHS / 8/12, HY27US0828A1, LVC541A G841325, 4776, PA8718, LVX8053, LVXT4053.
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 supply voltage of the varicaps of the tuner FSS BTP-HC401 8-597-585-10, which usually is within 30-33V, as well as other supply voltages on the tuner pins.
Once again, we remind TV users: 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.
Service manual / schematic diagram -------------> Sony KDL-26P2520, KDL-32P2520, KDL-26P2530, KDL-32P2530, KDL-40P2530 CHASSIS SE-1
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).
PSU Advanced
The KDL-40P2530 model uses a G2.-SE-1 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the PWM controller FA5501AN-D1-TE1, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KDL-40P2530:
Installed matrix (LCD panel) LTA400WT-L05 1-802-386-21.
The matrix control uses the Timing Controller (T-CON) 400WSC4LV0.4.
To power the backlight, an inverter KLS-400W2 is used, it is controlled by the PWM controller BA2901F (14), BD9886FV (28). The transformer IT-136 073K is installed in the inverter converter. As power elements of the inverter, keys of the type NG51AF NG32BD NG49AL are used.
The necessary supply voltages for all nodes of the SONY KDL-40P2530 TV are generated by the power module 1-870-686-13, or its analogs using the FA5501AN (PFC), STR-A6169 (8), MCZ3001DB (18) microcircuits and 2SK3797 power switches 2SK3469.
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.
Tuner FSS BTP-HC401 8-597-585-10 provides the reception of television programs and tuning to channels.
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