Technical description and composition of the SAMSUNG LE46D551 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE46D551 LE46D551K2W
Chassis / Version: SQ03
Panel: LTF460HN01
Inverter (backlight): SST460_12A01
Power Supply (PSU): BN44-00441A I46F1-BHS
PWM Power: FSGM0465
MainBoard: BN41-01751A BN94-05412T
IC MainBoard: K9F1G08U0D, 25Q40,24C256, K4B1G1646G-BCH9, D23330AC, WT61P805, DRV612
Tuner: BN40-00197A DTS40FVL082A
Control: IR: BN96-16729P (BN41-01600A) D550-12C
Technical specifications LE46D551
SAMSUNG LE46D551
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE46D551 TV does not turn on, does not respond to the remote control and buttons on the control panel, does not light up or blink indicators.
Often in such cases, the BN44-00441A power module is faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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 chips FSGM0465 are usually checked by replacing with new, or obviously working.
- 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
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01751A 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements K9F1G08U0D, 25Q40,24C256, K4B1G1646G-BCH9, D23330AC, WT61P805, DRV612. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner BN40-00197A DTS40FVL082A is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
TV users and owners need to remember that attempts to self-repair a SAMSUNG LE46D551 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-01751A is shown in the figure below:BN41-01751A
BN41-01751A can be used in TVs:
SAMSUNG LE32D551K2 LE32D551K2W (Panel LTF320HN01), SAMSUNG LE46D550K1 LE46D550K1W (Panel LTF460HN01), SAMSUNG LE40D551 LE40D551K2W (Panel LTF400HM03), SAMSUNG LE46D551 LE46D551 LE.
The appearance of the power supply
Main features of the SAMSUNG LE46D551 device:
Installed matrix (LCD panel) LTF460HN01.
To power the backlight used inverter SST460_12A01.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE46D551 TV is carried out by the BN44-00441A power module, or its analogs using FSGM0465 microcircuits.
MainBoard - the main board (motherboard) is a module BN41-01751A, using microchips K9F1G08U0D, 25Q40,24C256, K4B1G1646G-BCH9, D23330AC, WT61P805, DRV612 and others.
The tuner BN40-00197A DTS40FVL082A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF460HN01
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
Surface: Antiglare (Haze 5.5%), Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V