Technical description and composition of the SAMSUNG LW17E24CB TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LW17E24CB
Chassis / Version: ES17E, R817AS
Panel: 17 inch
Power Supply (PSU): Adapter
MainBoard: BN41-00185A
IC MainBoard: SAA5264 PS / M3 / Q104, SB9145, SAA5264 V1 * 6-205, MPS 3411G B8 V3, VSP 9407B, TSC80251G2D, M27C2001, 24C16
Appearance
SAMSUNG LW17E24CB
General repair guidelines for TV LCD
Any repair of electronic equipment begins with a careful external inspection of the device and troubleshooting. In this case, you should carefully examine all the elements of the SAMSUNG LW17E24CB TV, both internal and external. Many changes visible to the naked eye make it possible to determine the future direction of troubleshooting and localization of the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element outputs, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the SAMSUNG LW17E24CB does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power module malfunction. In this case, first of all, it is necessary to check the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling resistors of the primary power supply circuit, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
Sometimes the SAMSUNG LW17E24CB TV 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).
In most cases, the diagnosis and repair of the inverter is difficult due to the organization of protection, which turns it off in emergency cases in order to avoid fires during short circuits or breaks in high voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - KIA7045RFT reset C21.
We recommend the owners of the LW17E24CB TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC ----> Samsung LW15E23CB, LW17E24CB Chassis ES15E*, ES17E*.
The appearance of the MainBoard BN41-00185A is shown in the figure below:BN41-00185A
Main features of the SAMSUNG LW17E24CB device:
Installed matrix (LCD panel) 17 inches.
To power all the internal components of the SAMSUNG LW17E24CB TV, an external adapter type source is used.
MainBoard - the main board (motherboard) is a BN41-00185A module, using SAA5264 PS / M3 / Q104, SB9145, SAA5264 V1 * 6-205, MPS 3411G B8 V3, VSP 9407B, TSC80251G2D, M27C2001, 24C16 and others chips.