Technical description and composition of the SAMSUNG LE26R41B TV, type of panel and applicable modules. The composition of the modules.SAMSUNG
Model: LE26R41B LE26R41BD
Chassis / Version: RE26EO
Panel: LTA260W2-L01 or LTA260W2-L11
Lamp backlight: 8 Lamp CCFL
T-CON: LJ94-00847C 260W2C4LV1.6
Inverter (backlight): SIT260W2D8UB02 HU26024W2C
PWM Inverter: BD9884FV
MOSFET Inverter: SP8M3
Power Supply (PSU): BN41-00522B
PWM Power: VIPER12A, ICE1PCS02, STR-W6755
MOSFET Power: 18N50
MainBoard: BN41-00595A & BN41-00568C
IC MainBoard: IBM39STB04501, K4S281632F, K4S641632H
Tuner: BN40-00042A TMQZ6-405A
Specifications LE26R41B
SAMSUNG LE26R41B
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE26R41B TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, a malfunction is most likely to be detected in the BN41-00522B power module. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches (18N50) and rectifier diodes of the converters for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) VIPER12A, ICE1PCS02, STR-W6755, if they do not have visible damage to the housing and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in powering the inverter, you should ring in its converter power keys for breakdown and the secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-00595A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). When repairing an MB board, it is necessary to check its components IBM39STB04501, K4S281632F, K4S641632H. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00042A TMQZ6-405A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
TV users and owners must remember that attempts to self-repair a SAMSUNG LE26R41B TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-00595A is shown in the figure below:BN41-00595A
BN41-00595A can be used in TVs:
SAMSUNG LE26R41B LE26R41BD (Panel LTA260W2-L01 or LTA260W2-L11), SAMSUNG LE32R41B LE32R41BD (Panel LTA320W2-L03).
The appearance of the power supply
Main features of the SAMSUNG LE26R41B device:
Installed matrix (LCD panel) LTA260W2-L01 or LTA260W2-L11.
The matrix control uses the Timing Controller (T-CON) LJ94-00847C.
To power the backlight, an inverter SIT260W2D8UB02 is used, it is controlled by the BD9884FV PWM controller. As power elements of the inverter, keys of the type SP8M3 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE26R41B TV are generated by the BN41-00522B power module or its analogs using VIPER12A, ICE1PCS02, STR-W6755 microcircuits and 18N50 type power switches.
MainBoard - the main board (motherboard) is a module BN41-00595A, using chips IBM39STB04501, K4S281632F, K4S641632H and others.
The tuner BN40-00042A TMQZ6-405A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA260W2-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
