Technical description and composition of the SAMSUNG UE55JS9000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55JS9000 UE55JS9000U
Chassis / Version: BN41-02328B
Panel: CY-XJ055FLLV1V
LED backlight: S_5JS85_55_SFL LM41-00120E
T-CON: BN41-02297A LSF550FJ06
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00816A L65EM8NA_FSM REV1.3
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02328B BN94-09147D
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: One connect BN94-08353K
Technical Specifications UE55JS9000T
SAMSUNG UE55JS9000
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE55JS9000 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.
In such cases, the fault should be sought first in the BN44-00816A power supply module. It is necessary to measure its output voltages, and if they are absent (full or partial), you should check the health of the power switches (N-FET TO-220F) of the converters and rectifier diodes for a possible short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually 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) PFC, PWM, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously 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.
The faulty usually in these cases is the backlight matrix (LED-panel). More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. 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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02328B 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). In cases of attempts to repair the MB board (SSB), it is necessary to check the serviceability of its elements - CPU, eMMC, DRAM, AUDIO, DC / DC which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If you suspect a malfunction of the One connect BN94-08353K tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and the data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
It should be remembered! Attempts to self-repair a SAMSUNG UE55JS9000 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
The appearance of the MainBoard BN41-02328B is shown in the figure below:BN41-02328B
The appearance of the power supply
Main features of the SAMSUNG UE55JS9000 device:
Installed matrix (LED panel) CY-XJ055FLLV1V.
The matrix control uses the Timing Controller (T-CON) BN41-02297A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE55JS9000 TV are generated by the BN44-00816A power supply module or its analogs using PFC, PWM microcircuits, and N-FET TO-220F type power switches.
MainBoard - the main board (motherboard) is a BN41-02328B module, using CPU, eMMC, DRAM, AUDIO, DC / DC and other chips.
The One connect BN94-08353K tuner allows you to receive TV programs and tune to channels.
