Technical description and composition of the SAMSUNG LE26A450 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE26A450 LE26A450C2
Chassis / Version: GCR26SE *
Panel: LTF260AP01
T-CON: 260AP01C2LV1.3
Inverter (backlight): INV26S10A
PWM Inverter: OZ9966SN (24pin)
MOSFET Inverter: AOD486A
Trans Inverter: LT-U2610
Power Supply (PSU): BN44-00214A
PWM Power: MC33067P, STR-A6159, TDA4863G (PFC)
MOSFET Power: 10N60 (PFC), 5N50C * 2
MainBoard: BN41-00983A
IC MainBoard: SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100
Tuner: BN40-00116A
Specifications LE26A450C2
SAMSUNG LE26A450
General repair guidelines for TV LCD
An external examination of the external and internal elements should be carried out in a timely manner before the start of dismantling operations. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should begin by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors 10N60 (PFC) for the possibility of an avalanche or thermal breakdown.
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 microcircuit of the PWM controller MC33067P, STR-A6159, TDA4863G (PFC) 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 SAMSUNG LE26A450 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. Lamps or 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. 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 BN41-00983A, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed by local heating. Board repair and chip replacement SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If a tuner BN40-00116A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Attention to the owners! Attempts to repair the TV SAMSUNG LE26A450 on its own are not recommended by the manufacturer and can lead to serious negative consequences!
The appearance of the MainBoard BN41-00983A is shown in the figure below:BN41-00983A
BN41-00983A can be used in TVs:
SAMSUNG LE26A451C1 (Panel T260XW02 V.L), SAMSUNG LE37A450C2 (Panel CLAA370WA03), SAMSUNG LE26A450 LE26A450C2 (Panel LTF260AP01), SAMSUNG LE32A450C2 (Panel T315XW02 V.L32WL15A1451151L1W3151L1A1UN1.
The appearance of the power supply
Main features of the SAMSUNG LE26A450 device:
Installed matrix (LCD panel) LTF260AP01.
The matrix control uses the Timing Controller (T-CON) 260AP01C2LV1.3.
The INV26S10A inverter is used to power the backlight, controlled by the OZ9966SN PWM controller (24pin). The transformer LT-U2610 is installed in the inverter converter. As power elements of the inverter, keys of the AOD486A type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE26A450 TV are generated by the BN44-00214A power module or its analogs using MC33067P, STR-A6159, TDA4863G (PFC) microcircuits and 10N60 (PFC), 5N50C * 2 type power switches.MainBoard - the main board (motherboard) is a BN41-00983A module, using SEM01 0827S-LF, 25L1605AM21, SDP72, SIL9185CTU, EM6A9160TSOA-5G, NTP-3100 and others.
The tuner BN40-00116A provides the reception of television programs and tuning to channels.
