Technical description and composition of the SAMSUNG UE32EH5007K TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32EH5007K UE32EH5007
Chassis / Version: U71A / Ver. TH02
Panel: LTJ320HN07-L
LED backlight: 32F-3535LED-40EA, D1GE-320SC1-R3 (12.04,12)
T-CON: LSJ320HN03-S, SK98BN950 (BN41-01797A)
LED driver (backlight): integrated into PSU; 140V 260mA
PWM LED driver: SLC1012C (FAN7340)
MOSFET LED driver: MDD3752
Power Supply (PSU): BN44-00493B (PD32AVF_CHS Rev1.3)
PWM Power: SSC2S110
MOSFET Power: MDF11N65B
MainBoard: BN41-01795A BN94-05951J
IC MainBoard: DRAM: K4B1G1646G-BCH9; SOUND: NTP-7412S;
Tuner: DT0D40FVL084AA BN40-00231A
Control: AA59-00602A, IR BN96-22413D (BN41-01840B)
Appearance
SAMSUNG UE32EH5007K
General repair guidelines for TV LCD LED
In the absence of any signs of operability, when the SAMSUNG UE32EH5007K does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the power supply module BN44-00493B (PD32AVF_CHS Rev1.3) of the TV. 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.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the SSC2S110 PWM controller chip may be malfunctioning. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuit.
If the SAMSUNG UE32EH5007K does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the LTJ320HN07-L panel is likely. LEDs or their power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the backlight unit.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source. By opening the panel, each LED can be checked separately. Usually, Chinese multimeters light up a single 3-volt LED, if you connect probes in the forward direction to it. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as a health indicator. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
On the motherboard BN41-01795A BN94-05951J, in case of a malfunction, you should first check the operation of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace DRAM elements: K4B1G1646G-BCH9; SOUND: NTP-7412S; . BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune into television channels, the tuner DT0D40FVL084AA BN40-00231A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
It should be remembered! Attempts to repair the SAMSUNG UE32EH5007K TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-serviceability of the device!
SCHEMATICS ------------> Samsung UE32EH5007K shassis U71A, U71B.
UE32EH5****, UE22ES5****, UE37EH5**** UE19ES4****, UE40EH5****, UE46EH5****, UE26EH4****, UE32EH4****
UE32EH5007K Ver. AH05, Panel T320HVN02.0, BN41-01795A BN94-05951W, TUNER: BN40-00239C.
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 UE32EH5007K device:
Installed matrix (LED panel) LTJ320HN07-L.
The matrix control uses the Timing Controller (T-CON) LSJ320HN03-S.
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 UE32EH5007K TV are generated by the BN44-00493B power module or its analogs using SSC2S110 microcircuits and power switches of the MDF11N65B type.
MainBoard - the main board (motherboard) is a BN41-01795A module, using DRAM chips: K4B1G1646G-BCH9; SOUND: NTP-7412S; and others.
Tuner DT0D40FVL084AA BN40-00231A provides the reception of television programs and tuning to channels.