SAMSUNG LED
Model: UE46ES7507 UE46ES7507U
Panel: LTJ460HQ27-L
LED backlight: Edge LED
T-CON: 240HZ-TCON BN41-01790C LSJ460HQ02S
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M
MOSFET LED driver: K8A500D, F9N25
Power Supply (PSU): BN44-00522B PD46B2Q_CDY
PWM Power: UCC25600, 2A153D (Stb), PC7011F (PFC)
MOSFET Power: K8A50D, MDF11M60 (PFC)
MainBoard: BN41-01800B BN94-06123J
IC MainBoard: SDP1101, KLM2G1HE3F, RTL8201F, TAS5735, Si9587CNUC
Tuner: BN40-00238B DNTD243VH144AA
Control: WIFI: WIDT20R BN59-01148C
Technical Specifications UE46ES7507
SAMSUNG UE46ES7507
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE46ES7507 TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
With similar manifestations, in some cases, the BN44-00522B power module is faulty. 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 (K8A50D, MDF11M60 (PFC)) and rectifier diodes of the converters for a possible short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) UCC25600, 2A153D (Stb), PC7011F (PFC), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
In some of these cases, a malfunction is caused by a lack of display backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN-junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01800B 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - SDP1101, KLM2G1HE3F, RTL8201F, TAS5735, Si9587CNUC. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
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 BN40-00238B DNTD243VH144AA and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
TV users and owners need to remember that attempts to self-repair a SAMSUNG UE46ES7507 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-01800B is shown in the figure below:BN41-01800B
BN41-01800B can be used in TVs:
SAMSUNG UE40ES8007U UE40ES8007 (Panel LTJ400HL14-L), SAMSUNG UE40ES7507 UE40ES7507U (Panel LTJ400HL14-L), SAMSUNG UE65ES8005 (Panel CY-LE650DSA V1C).
The appearance of the power supply
Main features of the SAMSUNG UE46ES7507 device:
Installed matrix (LED-panel) LTJ460HQ27-L.
The matrix control uses the Timing Controller (T-CON) 240HZ-TCON.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the SLC5012M PWM controller. As the power elements of the LED driver, keys of the type K8A500D, F9N25 are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46ES7507 TV are generated by the BN44-00522B power supply module or its analogs using UCC25600, 2A153D (Stb), PC7011F (PFC) microcircuits and K8A50D, MDF11M60 (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-01800B module, using microchips SDP1101, KLM2G1HE3F, RTL8201F, TAS5735, Si9587CNUC and others.
The tuner BN40-00238B DNTD243VH144AA provides the reception of television programs and tuning to channels.
