SAMSUNG
Model: LS22A13W
Chassis / Version: LC22A13WX / XSG
Panel: LTA220W1-L01
T-CON: sys PD22E0 / so BN41-00229
Power Supply (PSU): Adapter
MainBoard: BN41-00229 PD22S0 BN41 00228A
IC MainBoard: Sound TA2024
Appearance
SAMSUNG LS22A13W
General repair guidelines for TV LCD
Like any other TV, SAMSUNG LS22A13W 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. Electrolytic capacitors of filters with a swollen body, as well as ring cracks or a layer of coal formed on the resistors of heating elements, sometimes give the repairman the reasons for the malfunction and possible consequences.
If the adapter power module fails, the external manifestations may be different, for example, SAMSUNG LS22A13W does not turn on at all and there is no indication of the indicator lights on the front panel. 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 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 TA2024 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.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is absent initially when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter of the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked.
Often, attempts to repair the inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
It should be remembered that when the protection is turned off, there is always a risk of failure of the power elements of the inverter during diagnosis. After repair, it is imperative to restore all standard converter protection circuits.
Repair or diagnostics of the PD22S0 BN41 00228A motherboard must be started by checking the power conditioners. If necessary, update the software (software).
We recommend the owners of the LS22A13W TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATICS ---------------> Samsung LS22A13W Chassis PD22SO.
Main features of the SAMSUNG LS22A13W device:Installed matrix (LCD-panel) LTA220W1-L01.
The matrix control uses the Timing Controller (T-CON) sys.
To power all internal components of the SAMSUNG LS22A13W TV, an external adapter type source is used.
MainBoard - the main board (motherboard) is a BN41-00229 module, using Sound TA2024 microcircuits and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA220W1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 22.0 inch
Resolution: 1280x720, WXGA
Display Mode: Transmissive
Active Area: 487.58x274.32 mm
Display Colors: 16.7M (8-bit)