SAMSUNG LED
Model: UE46ES8007U
Chassis / Version: U81A
Panel: LTJ460HQ10-L // LTJ460HQ27-L
T-CON: BN41-01790C 240hz_TCON
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M (MAP3312B)
MOSFET LED driver: KF9N25D (250V 7.5A)
Power Supply (PSU): BN44-00522B PD46B2Q_CDY
PWM Power: UCC25600, SPC7011F (PFC = FA5695N), STR2A153D (Standby = SQD2011K)
MOSFET Power: TK8A50D
MainBoard: BN41-01800A BN94-05585R
IC MainBoard: SDP1101, KLM2G1HE3F, RTL8201F; TAS5735; Si9587CNUC
Tuner: BN40-00236B // BN40-00238A
Control: Wi-Fi: WIDT20R
Appearance
SAMSUNG UE46ES8007U
General repair guidelines for TV LCD LED
If the UE46ES8007U does not turn on, does not respond to the remote control and buttons on the front panel, does not blink light bulbs and does not show any signs of operability, the BN44-00522B power supply module is probably faulty in this case.
When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the cause should be sought in the power semiconductor elements of pulse converters. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and all power switches. The complete inoperability of the power supply unit can be caused by a short circuit in the primary circuit, followed by an open fuse, or a short circuit in the loads.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller circuits UCC25600, PFC: SPC7011F (FA5695N), Standby: STR2A151D (SQD2011K), which can only be checked by replacing with new or obviously working ones.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when turned on, but the sound has other functions that work, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter of the LTJ460HQ10-L panel backlight assembly.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly. In dual LEDs (6V), you can check the protective zener diode as an indirect indicator of the health of the LED. In a faulty LED, the zener transition will either be cut off or broken.
Repair or diagnostics of the BN41-01800A BN94-05585R motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update the software (software).
When repairing an MB board, it is necessary to check its components SDP1101, KLM2G1HE3F, RTL8201F; TAS5735; Si9587CNUC. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00236B // BN40-00238A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of a SAMSUNG UE46ES8007U TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC MANUAL ----> SAMSUNG UE40ES80**, UE46ES80** UE55ES80** UE65ES80** CHASSIS U81A.
PSU SCHEMATIC -----------------> Power supply BN44-00522B.
UE46ES8007U - Version: UE03, Panel: LTJ460HQ27-L, Main: BN41-01800B, T-CON: BN41-01790C.
The appearance of the MainBoard BN41-01800A is shown in the figure below:BN41-01800A
BN41-01800A can be used in TVs:
SAMSUNG UE40ES7507 UE40ES7507U (Panel LTJ400HL14-L), SAMSUNG UE46ES8007U (Panel LTJ460HQ10-L), SAMSUNG UE55ES8000S UE55ES8000 (Panel LTJ550HQ30-B), SAMSUNG UE40ES8000 UE40ES8000S (Panel LTJ400HL08-B), SAMSUNG UE55ES8005 (Panel LTJ550HQ30-B ).
PSU Advanced
The power module BN44-00522B is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on a PWM controller SPC7011F = FA5695N, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE46ES8007U device:
Installed matrix (LED-panel) LTJ460HQ10-L or LTJ460HQ27-L.
The matrix control uses the Timing Controller (T-CON) BN41-01790C.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC5012M PWM controller (MAP3312B). As the power elements of the LED driver, keys of the type KF9N25D (250V 7.5A) are used.
The necessary supply voltages for all nodes of the SAMSUNG UE46ES8007U TV are generated by the BN44-00522B power supply module or its analogs using UCC25600, SPC7011F (PFC = FA5695N), STR2A153D (Standby = SQD2011K) microcircuits and TK8A50D power switches.
MainBoard - the main board (motherboard) is a BN41-01800A module, using microchips SDP1101, KLM2G1HE3F, RTL8201F; TAS5735; Si9587CNUC and others.
The tuner BN40-00236B // BN40-00238A provides the reception of television programs and tuning to channels.