Material is added to the pages as data from available technical documentation, personal author's experience and from the masters of repair forums accumulate. More detailsTechnical description and composition of the SAMSUNG LW15E33CX TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LW15E33CX
Panel: LTM150XH-L06
Lamp backlight: Edge LED 4Lamp
Inverter (backlight): BN44-00056B
Power Supply (PSU): Adapter AD-4214 14V 3A
MainBoard: BN91-00695B LW15E33CX
IC MainBoard: TSC80251G2D - 24CB, M27C2001, VSP 9407B B11, SAA5264 PS / M3 / Q104
Control: 00225C
Appearance
SAMSUNG LW15E33CX
General repair guidelines for TV LCD
Like any other TV, SAMSUNG LW15E33CX repair is advisable to start with a careful examination of the external and internal elements. It often happens that some damage to elements or connections will help determine the direction of troubleshooting and localization of the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the LW15E33CX does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, most likely the adapt AD-4214 power supply module is faulty. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If the SAMSUNG LW15E33CX has no 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.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or during depressurization of lamps. This protection makes it difficult to diagnose and repair the inverter.
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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - TSC80251G2D - 24CB, M27C2001, VSP 9407B B11, SAA5264 PS / M3 / Q104. 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 LW15E33C, LW17E34C Chassis AS15E*, AS17E*.
Main features of the SAMSUNG LW15E33CX device:
Installed matrix (LCD panel) LTM150XH-L06.
To power the backlight used inverter BN44-00056B.
To power all the internal components of the SAMSUNG LW15E33CX TV, an external adapter type AD-4214 14V 3A is used.
MainBoard - the main board (motherboard) is a BN91-00695B module, using TSC80251G2D - 24CB, M27C2001, VSP 9407B B11, SAA5264 PS / M3 / Q104 and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM150XH-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.1x228.1 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 400: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 5/20 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3V