Technical description and composition of the SAMSUNG UE55ES8007 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55ES8007
Chassis / Version: U81A / Ver: UE02
Panel: LTJ550HQ30-L
LED backlight: BN96-21470A & BN96-21471A
T-CON: BN41-01790C LSJ550HQ03-S
LED driver (backlight): integrated into PSU
PWM LED driver: SLC5012M, SLC9012M
MOSFET LED driver: KF9N25D
Power Supply (PSU): BN44-00523B PD56B2Q_CDY
PWM Power: STR2A153D, SPC7011F (FA5695N)
MOSFET Power: MDF11N60
MainBoard: BN41-01800B BN94-06124N
IC MainBoard: SDP1101, KLM2G1HE3F, RTL8201F, TAS5735, Si9587CNUC
Tuner: BN40-00238B DNTD243VH144AA
Control: Wi-Fi: BN59-01148C (WIDT20R)
Technical Specifications UE55ES8007
SAMSUNG UE55ES8007
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE55ES8007 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Most likely in this case, the main switching power supply (IIP) BN44-00523B is faulty. It is necessary to measure its output voltages, and if they are absent, check the operability of the power switches (MDF11N60) of the converters and rectifier diodes for a short circuit probability.
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.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) STR2A153D, SPC7011F (FA5695N), if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason can be both in the power of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
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, 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 is working 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.
Once again, remind users! Attempts to self-repair a SAMSUNG UE55ES8007 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual ------------------> SAMSUNG UE55ES8007 Chassis U81A.
PSU SCHEMATIC -----------------> BN44-00523B
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 UE55ES8007 device:
Installed matrix (LED-panel) LTJ550HQ30-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 a PWM controller SLC5012M, SLC9012M. As the power elements of the LED driver, keys of the KF9N25D type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE55ES8007 TV are generated by the BN44-00523B power module or its analogs using the STR2A153D, SPC7011F (FA5695N) microcircuits and MDF11N60 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.
