Technical description and composition of the SAMSUNG UE32EH5040 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32EH5040 UE32EH5040W
Chassis / Version: U71A / U71B
Panel: LTJ320HN07-L
LED backlight: BN96-21476A 32F-3535LED-40EA D1GE-320SC1-R2
T-CON: BN41-01797A LSJ320HN03-S
LED driver (backlight): integrated into PSU
PWM LED driver: SLC1012C (FAN7340)
MOSFET LED driver: MDD3752
Power Supply (PSU): BN44-00493B PD32AVF_CHS
PWM Power: SSC2S110
MOSFET Power: MDF11N65B
MainBoard: BN41-01795A BN94-05842D
IC MainBoard: WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D
Tuner: BN40-00231A
Control: IR: BN41-01840B BN96-22413D
Technical Specifications UE32EH5040
SAMSUNG UE32EH5040
General repair guidelines for TV LCD LED
Possible malfunctions
- The SAMSUNG UE32EH5040 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, the BN44-00493B power module usually fails. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (MDF11N65B) and rectifier diodes in the converters for a short circuit.
In case of breakdowns of the diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) SSC2S110, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - WT61P805, EEprom: 24C256C4VCX, SPI Flash: 25Q40BVSIP, NAND: K9F1G08U0D. Defective components should be replaced.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, check the voltage of the tuner BN40-00231A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to users! Self-repair of a SAMSUNG UE32EH5040 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual and schematic diagram ----------------> SAMSUNG UE32EH5040 Chassis U71A/U71B.
PSU SCHEMATIC Samsung ------------> BN44-00493B Power supply
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 UE32EH5040 device:
Installed matrix (LED panel) LTJ320HN07-L.
The matrix control uses the Timing Controller (T-CON) BN41-01797A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the PLC controller SLC1012C (FAN7340). As power elements of the LED driver, keys of the MDD3752 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE32EH5040 television are generated by the BN44-00493B power module or its analogs using SSC2S110 microcircuits and MDF11N65B type power switches.
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.
