Technical description and composition of the SAMSUNG UE55JU6450U TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE55JU6450U
Panel: CY-GJ055HGLV2V
LED backlight: LM41-00135A BN96-34797A, LM41-00136A BN96-34798A
T-CON: BN95-01938A BN41-02297A LSF550FN05-K
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00807A L55S6_FHD
MainBoard: BN41-02344D BN94-10158V
IC MainBoard: CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA
Tuner: BN40-00318B
Control: IR: BN96-35346D BN41-02324A, WI-F & BT: BN59-01194A
Technical Specifications UE55JU6450U
SAMSUNG UE55JU6450U
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE55JU6450U does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the BN44-00807A module, is faulty. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
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.
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), 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 commands from the remote control. Or the image appears immediately after turning on and disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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 detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-02344D motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA. Defective components should be replaced.
Before replacing the tuner BN40-00318B, if there is no tuning to the channels, you must 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
TV users and owners must remember that attempts to self-repair a SAMSUNG UE55JU6450U TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
BN41-02344D
The appearance of the power supply
Main features of the SAMSUNG UE55JU6450U device:
Installed matrix (LED-panel) CY-GJ055HGLV2V.
The matrix control uses the Timing Controller (T-CON) BN95-01938A.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE55JU6450U TV is carried out by the power module BN44-00807A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02344D module, using CPU chips: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA and others.
The tuner BN40-00318B provides the reception of television programs and tuning to channels.
