Technical description and composition of the SAMSUNG LE46C750R2W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE46C750R2W LE46C750
Panel: LTF460HQ01
Inverter (backlight): integrated into PSU
PWM Inverter: LX6503
Power Supply (PSU): BN44-00341A I46F1_ASM
PWM Power: STR-W6052
MainBoard: BN41-01423B
IC MainBoard: SIL9389CTU, K4T1G084QF, STA3698WS
Tuner: BN40-00188A
Specifications LE46C750
SAMSUNG LE46C750R2W
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE46C750R2W TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, a malfunction is most likely to be detected in the BN44-00341A power supply module. Then it is necessary to measure its output voltage and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches 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 Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits STR-W6052 are usually checked by replacing with new ones, or with known good ones.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, 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 distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01423B 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, you need to check its components SIL9389CTU, K4T1G084QF, STA3698WS. 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 there is no reception of television channels, but the TV works properly from external devices, first of all, check the voltage of the tuner BN40-00188A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
We recommend LE46C750R2W TV owners for repair to contact only qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
Samsung LE46C750R2Z - Panel: LTF460HQ01; T-CON: 2010_R240S_MB4_0.5 - LAUB041T0B, N2NDCJ, N2PF3N; PSU: BN44-00341A;
MB: BN41-01423B BN94-03388B - Valencia N2HWRC, S4LJ103K, P3T099.00, Sil9389CTU
The appearance of the MainBoard BN41-01423B is shown in the figure below:BN41-01423B
The appearance of the power supply
Main features of the SAMSUNG LE46C750R2W device:
Installed matrix (LCD panel) LTF460HQ01.
To power the backlight, a converter is used, combined with the power supply, controlled by the LX6503 PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE46C750R2W TV is carried out by the BN44-00341A power module, or its analogs using STR-W6052 microcircuits.
MainBoard - the main board (motherboard) is a BN41-01423B module, using SIL9389CTU, K4T1G084QF, STA3698WS and others.
The tuner BN40-00188A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF460HQ01
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Frequency: 240Hz
Lamp Type: WLED