Technical description and composition of the SAMSUNG UE26EH4030 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE26EH4030 UE26EH4030W
Chassis / Version: AS01
Panel: DE260AGA-B1
LED backlight: BN96-21474A 26-3535LED-21EA
T-CON: T260XVN01.1 CTRL BD 26T11-C04
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00491A PD26AV0_CSM
MainBoard: BN41-01795A BN94-05546D
IC MainBoard: WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D
Tuner: BN40-00231A
Control: BN41-01858C BN96-23694B
Technical Specifications UE26EH4030
SAMSUNG UE26EH4030
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE26EH4030 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In some of these cases, the main switching power supply, the BN44-00491A module, turns out to be faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a 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 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 key parameters. 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, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can test each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-01795A 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 WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00231A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, remind users! Attempts to self-repair a SAMSUNG UE26EH4030 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC MANUAL------------> Samsung Chassis: U71A, U71B Model: UE32EH5****, UE22ES5****, UE37EH5****, UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****.
The appearance of the MainBoard BN41-01795A is shown in the figure below:BN41-01795A
BN41-01795A can be used in TVs:
SAMSUNG UE32EH4000 UE32EH4000W (Panel LTJ320AP03-L), SAMSUNG UE32EH5000W (Panel DE320BGM-C1), SAMSUNG UE26EH4000W (Panel T260XVN01.1), SAMSUNG UE32EH5007K UE32EH5007 (Panel LTJ320HN07-L), SAMSUNG UE32EH5047K UE32EH5047 (Panel DE320BGA-B1), SAMSUNG UE40EH5007K (Panel CY-DE400BGSV1L), SAMSUNG UE32EH5057K (Panel DE320BGA-B1), SAMSUNG UE40FH5007K (Panel CY-DF400BGLV1V), SAMSUNG UE40EH5047K (Panel LTJ400HM08-L), SAMSUNG UE40EH5057K UE40EH5057 (Panel CY-DE400BGSV1L), SAMSUNG UE40EH5050W UE40EH5050 (Panel CY -DE400BGSV1L), SAMSUNG UE40EH5000 UE40EH5000W (Panel LTJ400HM801-V), SAMSUNG UE32EH5000K UE32EH5000 (Panel LTJ320HN07-L), SAMSUNG UE32EH5000W UE32EH5000 (Panel DE320BGM-C1), SAMSUNG LE32E420E2W LE32E420 (Panel LTF320AP13), SAMSUNG UE32EH4030 UE32EH4030W (Panel DE320AGH-C2 ), SAMSUNG UE46EH5057K UE46EH5057 (Panel LTJ460HN05-L), SAMSUNG UE40EH5040 UE40EH5040W (Panel CY-DE400BGSV1L).
The appearance of the power supply
Main features of the SAMSUNG UE26EH4030 device:
The matrix (LED panel) DE260AGA-B1 is installed.
The matrix control uses the Timing Controller (T-CON) T260XVN01.1.
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 UE26EH4030 TV is carried out by the power module BN44-00491A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-01795A module using WT61P805 chips, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D and others.
The tuner BN40-00231A provides the reception of television programs and tuning to channels.
