Technical description and composition of the SAMSUNG UE40F7000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40F7000 UE40F7000AT
Chassis / Version: Version TE02
Panel: CY-SF400DSLV2L
T-CON: BN95-00963B (or BN96-27240A)
LED driver (backlight): integrated into PSU; 71V 500mA, 158V 500mA
Power Supply (PSU): BN44-00632B L46F2P_DDY
MainBoard: BN41-01973A BN94-06186N
Tuner: DNTT243IH145A BN40-00267A
Control: Built-in Camera: BN96-26579B Wi-Fi: WIDT30Q BN59-01161A
Technical Specifications UE40F7000
SAMSUNG UE40F7000
General repair guidelines for TV LCD LED
If the power module BN44-00632B L46F2P_DDY malfunctions, the external manifestations may be different, for example, SAMSUNG UE40F7000 does not turn on at all and there is no indication of the indicator lights on the front panel. After checking the mains fuse and power elements of the primary power supply circuit, you should also check for the presence of a short circuit in the loads of the secondary rectifiers.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip may also cause a breakdown of the power switch of the converter.
The LED driver for powering the backlight LEDs is made according to the step-up converter circuit with current control in the load and the PSU BN44-00632B general module is included.
If there is no image when you turn on the SAMSUNG UE40F7000, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the CY-SF400DSLV2L panel, or in the node of the LED driver.
A backlight malfunction often occurs due to a break in the power supply lines of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the soldering of their outputs, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
Checking the LEDs for an object from a cliff or breakdown without disassembling the panel with a simple multimeter is impossible, a current source is required.
In cases of attempts to repair the motherboard BN41-01973A BN94-06186N, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed by local heating.
If you suspect a malfunction of the tuner DNTT243IH145A, if it is not possible to configure the channels, you should make sure that the software is correct, as well as the presence of supply voltages at the terminals of the tuner. Data exchange with the processor via the I2C bus can be observed using an oscilloscope.
Once again, remind users! Attempts to self-repair a SAMSUNG UE40F7000 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
BN41-01973A
The appearance of the power supply
Main features of the SAMSUNG UE40F7000 device:
Installed matrix (LED-panel) CY-SF400DSLV2L.
The matrix control uses the Timing Controller (T-CON) BN95-00963B.
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 UE40F7000 TV is carried out by the BN44-00632B power module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-01973A module.
The tuner DNTT243IH145A BN40-00267A provides the reception of television programs and tuning to channels.
