Technical description and composition of the SAMSUNG UE48H4200AK TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE48H4200AK
Panel: CY-HH048AGLV1V
LED backlight: DMGE-480SMB-R6 & DMGE-480SMA-R6
T-CON: 14Y_VD48HDMB7S4LV0.2 LSF480AN01-G02
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00757A L48G0B_ESM PSLF970G06A
MainBoard: BN41-02217B BN94-07912N
IC MainBoard: SENK14 25Q40CLSIP S24C256C F59L1G81A K4B2G164GQ-BCKO
Tuner: BN40-00287A
Control: IR: BN41-02226A
Technical Specifications UE48H4200
SAMSUNG UE48H4200AK
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE48H4200AK does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In most of these cases, the main switching power supply, the BN44-00757A module, is faulty. It is necessary to measure the output voltages in its secondary circuits, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
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. PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-02217B 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 complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips SENK14 25Q40CLSIP S24C256C F59L1G81A K4B2G164GQ-BCKO and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
The malfunction of the tuner BN40-00287A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention! For users and owners of UE48H4200AK TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of the MainBoard and voltage measurements at the test points BN41-02217B:BN41-02217B
BN41-02217B can be used in TVs:
SAMSUNG UE40H4200AK (Panel CY-HH040AGLV1V), SAMSUNG UE40H5300AK (Panel CY-HH040BGNV1V), SAMSUNG UE48H4200AK (Panel CY-HH048AGLV1V), SAMSUNG UE40H5003AK UE40H5003 (Panel CY-HH040BGNV1V / V400HJ6-PE1 Rev. C7).
The appearance of the power supply
Main features of the SAMSUNG UE48H4200AK device:
Installed matrix (LED panel) CY-HH048AGLV1V.
The matrix control uses the Timing Controller (T-CON) 14Y_VD48HDMB7S4LV0.2.
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 UE48H4200AK TV is carried out by the BN44-00757A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-02217B module, using SENK14 25Q40CLSIP S24C256C F59L1G81A K4B2G164GQ-BCKO chips and others.
The tuner BN40-00287A provides the reception of television programs and tuning to channels.
