Technical description and composition of the SAMSUNG LE40A430T1 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE40A430T1
Chassis / Version: GTN40SE *
Panel: T400XW01 V.5 // T400XW01 v.6
T-CON: T400XW01 V5 Crtl BD, 40T01-C00 (AS15-F)
Inverter (backlight): 4H.V2358.061 / G
Power Supply (PSU): BN44-00197B
PWM Power: ICE2QS01 (STAND_BY), ICE2PCS02G (PFC), LX1692A
MainBoard: BN41-00982A // BN41-00982B BN94-02123P
IC MainBoard: CPU: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256;
Tuner: HTM2-6L2 / 235S BN40-00116A
Control: Remote: BN59-00685A, IR: BN41-00850A
Specifications LE40A430T1
SAMSUNG LE40A430T1
General repair guidelines for TV LCD
Diagnostics of malfunctions and repairs SAMSUNG LE40A430T1, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. Often by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in soldering will help the master to guess the causes and possible consequences of the malfunction.
If the power supply module BN44-00197B malfunctions, external manifestations may be different, for example, SAMSUNG LE40A430T1 does not turn on at all and there is no indication of the indicator lights on the front panel. 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.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip ICE2QS01 (STAND_BY), ICE2PCS02G (PFC), LX1692A can also cause a breakdown of the power switch of the converter.
If the SAMSUNG LE40A430T1 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working. 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.
The motherboard BN41-00982A 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 regulators of the microcircuit are working, a software update may be necessary. Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256; and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner HTM2-6L2 / 235S BN40-00116A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of a SAMSUNG LE40A430T1 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
One of the typical defects of the SAMSUNG LE40A430T1 TV can occur in the panel T400XW01 V.5 // T400XW01 v.6.
External manifestations: color distortion in the image as a negative in the image, light tones predominate. Usually in such cases, the AS15-F gamma corrector is faulty. Another indicator of its malfunction is an excessively strong heating, which in practice allows you to do without measuring the voltage gradations of gray.
In most cases, replacing the AS15-F solves the problem.
It should be remembered that similar symptoms can cause faults in the column drivers of the panel, which is usually indicated by interference in the form of even vertical stripes on the screen. Then, after replacing the AS15-F, the situation does not change. Drivers are in loops and cannot be replaced. In this case, it is necessary to replace the glass panel.
SCHEMATICS ----> Samsung LE32A43*T**, LE37A43*T**, LE40A43*T** Chassis GTN32SE*, GTN37SE*, GTN40SE*
PSU SCHEMATICS ----> BN44-00197B.
The appearance of the MainBoard BN41-00982A is shown in the figure below:BN41-00982A
BN41-00982A can be used in TVs:
SAMSUNG LE32A330J1 (Panel V315B1-L01 REV.C4 C5), SAMSUNG LE37A430T1 (Panel T370XW02 VC), SAMSUNG LE40A330J1 (Panel T400XW01 V.5), SAMSUNG 37A330J1 (Panel T370XW02 VG01, SAM30, V30, TGV40, SAM30, TGV4, VG, V30, VG, VG, V30, VG, V30) LE26A330J1 LE26A330 (Panel V260B1-L13).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00197B module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the ICE2PCS02G PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the mains capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE40A430T1 device:
The matrix (LCD panel) T400XW01 V.5 or T400XW01 v.6 is installed.
The matrix control uses the Timing Controller (T-CON) T400XW01.
To power the backlight, an inverter 4H.V2358.061 is used.
The necessary supply voltages for all nodes of the SAMSUNG LE40A430T1 TV are generated by the BN44-00197B power supply module or its analogs using ICE2QS01 (STAND_BY), ICE2PCS02G (PFC), LX1692A microcircuits.
MainBoard - the main board (motherboard) is a BN41-00982A module, using CPU chips: SAMS01; DRAM: EM6A9160TSOA-5G; SPI Flash: MX25L1605AM2I-12G; EEPROM: 24C256; and others.
The tuner HTM2-6L2 / 235S BN40-00116A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T400XW01 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 885.168x497.664 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V