Technical description and composition of the SAMSUNG LW15S13C TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LW15S13C
Chassis / Version: MB15E
Panel: 15 inch TFT-LCD 1024 x 768
Power Supply (PSU): Adapter 14V
MainBoard: MAIN_PCB
IC MainBoard: VPC3230D-C5 Video Processor, TEA6425D Matrix adapter, DPTV-3D-6730, SDA5550M Micom + TXT, MN82860 Gamma, MSP3451G Sound processor, LM4863 Sound Amplifer
Tuner: TCPQ9091PC27D (S)
Technical Specifications LW15S13CR
SAMSUNG LW15S13C
General repair guidelines for TV LCD
Like any other TV, SAMSUNG LW15S13C repair is advisable to start with a careful examination of the external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. 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.
In cases where the SAMSUNG LW15S13C TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or, which happens much less often, there is no processor power on the motherboard. 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.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SAMSUNG LW15S13C does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
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 inverter power elements during diagnosis. After repair, it is necessary to restore all the standard converter protection circuits.
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - VPC3230D-C5, DPTV-3D-6730, SDA5550M, MN82860, MSP3451G, LM4863. Defective components should be replaced.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC ----------> Samsung LW15S13C Chassis MB15E*.
Main features of the SAMSUNG LW15S13C device:
Installed matrix (LCD-panel) 15 inches TFT-LCD 1024 x 768.
To power all internal components of the SAMSUNG LW15S13C TV, an external adapter type 14V is used.
MainBoard - the main board (motherboard) is the MAIN_PCB module, using VPC3230D-C5 Video Processor chips, TEA6425D Matrix adapter, DPTV-3D-6730, SDA5550M Micom + TXT, MN82860 Gamma, MSP3451G Sound processor, LM4863 Sound Amplifer and others.
The TCPQ9091PC27D (S) tuner provides television reception and channel tuning.