Technical description and composition of the SAMSUNG LE15S51BP TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE15S51BP LE15S51
Chassis / Version: GPU15KE
Panel: 15 inch 1024x768
Lamp backlight: 4 Lamp CCFL
Inverter (backlight): integrated into PSU
PWM Inverter: FAN7311
MOSFET Inverter: AF4502C
Trans Inverter: TMS90631CT
Power Supply (PSU): BN44-00112B REV: 1.0A - SSIP-15-SP
PWM Power: DM0565R
MainBoard: BN41-00641A
IC MainBoard: TDA15021H / N1B80, AT24C16AN, TDA7266D, TSU396QWJ A6MC108999H, TDA7050, FAN7311, MP1410ES
Tuner: TECH0849PG31B (S)
Control: BN59-00437A
Specifications LE15S51BP
SAMSUNG LE15S51BP
General repair guidelines for TV LCD
Like any other TV, SAMSUNG LE15S51BP repair is advisable to start with a careful examination of the external and internal elements. Visible damage to elements can sometimes suggest directions for finding a defect even before the necessary measurements are taken. 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.
If the power supply module BN44-00112A malfunctions, the external manifestations may be different, for example, SAMSUNG LE15S51BP A does not turn on at all and there is no indication of the indicator lights on the front panel. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch 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.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters 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 PWM controller chip itself 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 power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
The LE15S51BP A TV model can use the BN44-00112A power module, combined with an inverter (a converter for powering the backlight). With such a circuit design of the module, there is no possibility of a separate replacement of the inverter, but when repairing at a component level, there are usually no significant difficulties in diagnosing and localizing a defect.
Sometimes the TV SAMSUNG LE15S51BP (A) does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the converter of the backlight lamps, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including the power supply unit (power supply unit).
Repairing the inverter BN44-00112A or BN41-00347A, which can be installed in this model, is sometimes difficult because in case of any malfunction or emergency, even if the lamps are unevenly worn, a protection is triggered that turns it off for fire safety purposes. Diagnosis becomes very difficult and you need to disable protection.
In such cases, special care should be taken when diagnosing and repairing, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Diagnosis and repair of the BN41-00641A motherboard is carried out by checking the performance of power stabilizers or updating the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - TDA15021H / N1B80, AT24C16AN, TDA7266D, TSU396QWJ, A6MC108999H, TDA7050, FAN7311, MP1410ES. Defective components should be replaced.
It should be remembered! Attempts to repair the TV SAMSUNG LE15S51BP A, 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.....
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis / Version: GPU15KE / GPU20KE
The appearance of the MainBoard BN41-00641A is shown in the figure below:
BN41-00641A
BN41-00641A can be used in TVs:
SAMSUNG LE15S51BP LE15S51 (Panel 15 inches 1024x768), SAMSUNG LW15M23CP (Panel 15 inches 1024x768), SAMSUNG LW20M21CPX LW20M21BWT (Panel HT201V01-101).
The appearance of the power supply
Main features of the SAMSUNG LE15S51BP device:
Installed matrix (LCD panel) 15 inches 1024x768.
To power the backlight, a converter is used, combined with the power supply, controlled by the FAN7311 PWM controller. The transformer TMS90631CT is installed in the inverter converter. As power elements of the inverter, keys of the AF4502C type are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE15S51BP TV is carried out by the BN44-00112B power module, or its analogs using DM0565R microcircuits.
MainBoard - the main board (motherboard) is a BN41-00641A module, using TDA15021H / N1B80, AT24C16AN, TDA7266D, TSU396QWJ A6MC108999H, TDA7050, FAN7311, MP1410ES chips, and others.
Tuner TECH0849PG31B (S) provides the reception of television programs and tuning to channels.
Samsung LE15S51BP chassis GPU15KE / Samsung LE20S52BP Micom - TDA15021H/N1B80 (T-PLS6PEU), EEPROM - AT24C16AN, SMPS - DM0565R, SAW - G3956M & K9650M, Sound - TDA7266D, Tuner - TECH0849PG31B(S), TSU396QWJ A6MC108999H, TDA7050, MP1410ES, FAN7311, Пульт - BN59-00437A
