Technical description and composition of the SAMSUNG UE40C7000WW TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40C7000WW UE40C7000
Chassis / Version: N79A
Panel: LTF400HQ02
LED backlight: SLED 2010SVS40 240HZ_64 & LJ64-02370A
T-CON: LTF400HL01 BN81-04156A
LED driver (backlight): integrated into PSU
PWM LED driver: HV9963
MOSFET LED driver: FDPF5N50T
Power Supply (PSU): BN44-00375A PSLF172C01A PD46CF2_ZSM
PWM Power: ICE2PCS04G, ICE3BR1765J, UCC25600
MOSFET Power: TK8A50D, STF13NM60
MainBoard: BN41-01367A BN94-02724A
IC MainBoard: STA369BWS, EM6A9320BIA-4H, K4T1G084QE
Tuner: BN40-00171A DTOS30CYH071A
Control: IR: BN41-01453A (CT100107)
Technical Specifications UE40C7000
SAMSUNG UE40C7000WW
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE40C7000WW 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.
In such cases, the BN44-00375A power supply is usually faulty. Then we recommend measuring its output voltages and, if they are absent, you should check the health of the power switches (TK8A50D, STF13NM60) and rectifier diodes of the converters for probable 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) ICE2PCS04G, ICE3BR1765J, UCC25600, 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.
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01367A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips STA369BWS, EM6A9320BIA-4H, K4T1G084QE and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner BN40-00171A DTOS30CYH071A, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
We recommend the owners of the UE40C7000WW TV for repair only to qualified specialists with the necessary work experience! Attempts to repair it yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual ---------------> SAMSUNG UE40C7000 Chassis N79A. FOR SAMSUNG UE40C7000, UE46C7000, UE55C7000, UE40C8000, UE46C8000, UE55C8000, UE65C800, UA40C7000, UA46C7000, UA55C7000 UA40C8000, UA46C8000, UA55C8000, UA65C8000.
PSU SCHEMATIC -----------------> BN44-00375A
The appearance of the MainBoard BN41-01367A is shown in the figure below:
BN41-01367A
BN41-01367A can be used in TVs:
SAMSUNG UE46C7000WW UE46C7000 (Panel LTF460HQ02), SAMSUNG UE40C7000WW UE40C7000 (Panel LTF400HQ02).
The appearance of the power supply
Main features of the SAMSUNG UE40C7000WW device:
Installed matrix (LED-panel) LTF400HQ02.
The matrix control uses the Timing Controller (T-CON) LTF400HL01.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the HV9963 PWM controller. As power elements of the LED driver, keys of the FDPF5N50T type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40C7000WW television are generated by the BN44-00375A power supply module or its analogs using ICE2PCS04G, ICE3BR1765J, UCC25600 microcircuits and TK8A50D, STF13NM60 power switches.
MainBoard - the main board (motherboard) is a module BN41-01367A, using microchips STA369BWS, EM6A9320BIA-4H, K4T1G084QE and others.
The tuner BN40-00171A DTOS30CYH071A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF400HQ02
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Frequency: 240Hz
Lamp Type: WLED