Technical description and composition of the SAMSUNG UE55JS7200U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55JS7200U UE55JS7200
Chassis / Version: BN41-02344B
Panel: CY-TJ055HGEV2V
LED backlight: V5DR_550SCB_R0, V5DR_550SCA_R0
T-CON: 47-6021066
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00859A L55SHN_FHS
PWM Power: PFC, PWM
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02344B BN94-09287S
IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC
Tuner: BN40-00318B GT2S2-5C51 DVB-T2S2
Control: Wi-Fi: WCH730B
Technical Specifications UE55JS7200U
SAMSUNG UE55JS7200U
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE55JS7200U TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the fault should be sought first in the BN44-00859A power supply module. It is necessary to measure its output voltages and, if they are absent, check the power switches (N-FET TO-220F) and rectifier diodes for the probability of a short circuit in the converters.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode, or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PFC, PWM PWM controllers, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and all other functions work. Sometimes when you turn on the image for a second appears and disappears.
Often in such cases, there is no LED backlight. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver also turns out to be faulty.
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 the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02344B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements of CPU, eMMC, DRAM, AUDIO, DC / DC requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
Before replacing the BN40-00318B GT2S2-5C51 DVB-T2S2 tuner, if there is no channel setting, first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the SAMSUNG UE55JS7200U 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-serviceability of the device!
The appearance of the MainBoard BN41-02344B is shown in the figure below:BN41-02344B
The appearance of the power supply
Main features of the SAMSUNG UE55JS7200U device:
Installed matrix (LED-panel) CY-TJ055HGEV2V.
The matrix control uses the Timing Controller (T-CON) 47-6021066.
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SAMSUNG UE55JS7200U TV are generated by the BN44-00859A 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 BN41-02344B module, using CPU, eMMC, DRAM, AUDIO, DC / DC and other chips.
Tuner BN40-00318B GT2S2-5C51 DVB-T2S2 provides the reception of television programs and tuning to channels.
