Technical description and composition of the SAMSUNG LE37A430T1 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE37A430T1
Chassis / Version: GTN32SE *
Panel: T370XW02 V.C
T-CON: 37T03-C1 (AS15-F)
Inverter (backlight): VIT71060.50 LOGAN
PWM Inverter: OZ964GN
Power Supply (PSU): BN44-00216A PSLF231501C
PWM Power: MC33067P (16), FAN7530 (PFC), FSQ0365RN (Standby)
MOSFET Power: 17N60 (PFC), 9N50 (PWM)
MainBoard: BN41-00982A BN94-01679E // BN41-00982B BN94-02123E
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
Technical Specifications LE37A430T1
SAMSUNG LE37A430T1
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the SAMSUNG LE37A430T1 TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. Visible damage to elements can sometimes suggest directions for finding a defect even before the necessary measurements are taken. In some cases, faulty elements are visible to the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the PSLF231501C BN44-00216AS power supply module is defective and needs repair. Sometimes with similar manifestations, a problem can only occur in the absence of processor power, but this happens much less often. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of a break, the cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason to be looked for by checking other elements of the circuit. 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 microcircuit of the PWM controller MC33067P (16) can also cause a breakdown of the power switch of the converter.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If there is no image when you turn on the SAMSUNG LE37A430T1, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
When repairing the VIT71060.50 LOGAN inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair or diagnostics of the BN41-00982A (BN94-01679E) motherboard must be started by checking the power conditioners. If necessary, 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 defective elements.
Owners and users of the SAMSUNG LE37A430T1 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATICS ----> Samsung LE32A43*T**, LE37A43*T**, LE40A43*T** Chassis GTN32SE*, GTN37SE*, GTN40SE*
SCHEMATICS -----> Power supply BN44-00216A.
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
The LE37A430T1 model uses a BN44-00216A 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 FAN7530 PWM controller, 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 DC voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the SAMSUNG LE37A430T1 device:
Installed matrix (LCD panel) T370XW02 V.C.
The matrix control uses the Timing Controller (T-CON) 37T03-C1.
The VIT71060.50 inverter is used to power the backlight lamps, it is controlled by the OZ964GN PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG LE37A430T1 TV are generated by the BN44-00216A power module or its analogs using MC33067P (16), FAN7530 (PFC), FSQ0365RN (Standby) microcircuits and 17N60 (PFC), 9N50 (PWM) type power switches .
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: T370XW02 VC02
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V