Technical description and composition of the SAMSUNG UE32D4003BW TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE32D4003BW UE32D4003
Chassis / Version: Ver. CN01
Panel: LTJ320AP02-L // LD320AGC-C4
LED backlight: 2011SVS32, 4K_V1_1CH_PV_LEFT58_1116
LED driver (backlight): integrated into PSU; 203V 165mA
PWM LED driver: SEM5025
MOSFET LED driver: MDD5N40RH
Power Supply (PSU): BN44-00472A PD32G0S_BSM
PWM Power: STR-W6053S
MainBoard: BN41-01702A
IC MainBoard: SEMS20, 24C256, NTP-7411S
Tuner: DTM-8B / 125S BN40-00220A
Control: Remote: AA59-00496A, IR: BN41-01600A, D550-12C // BN96-17614U (BN41-01695C).
Technical Specifications UE32D4003
SAMSUNG UE32D4003BW
General repair guidelines for TV LCD LED
SAMSUNG UE32D4003BW, like other televisions, it is advisable to start repairing from inspection of external and internal elements and modules. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the UE32D4003BW TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink, there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip STRW6053S can also cause a breakdown of the power switch of the converter.
If the SAMSUNG UE32D4003BW does not have an image, but there is sound and the TV is controlled by the remote control, there may be a malfunction in the backlight circuits of the LTJ320AP02-L panel. The LEDs or the 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 LED driver, and check the LEDs, connecting obviously known good diagnostics.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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 motherboard BN41-01702 A must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Before replacing the DTM-8B / 125S BN40-00220A tuner, if there is no tuning for the channels, first check the software and the supply voltage at its terminals.
Once again, remind users! Attempts to self-repair a SAMSUNG UE32D4003BW TV without the appropriate qualifications and experience can lead to its complete non-repairability!
PSU SCHEMATIC BN44-00472A Power supply
BN41-01702A
BN41-01702A can be used in TVs:
SAMSUNG LE40D503F7W LE40D503F7WXRU (Panel LTF400HM05), SAMSUNG UE32D4003BW UE32D4003 (Panel LTJ320AP02-L), SAMSUNG UE40D5003 UE40D5003BW (Panel LD400B2402403 Panel U4002G2EBDUE UD40E2BDUEE
The appearance of the power supply
Main features of the SAMSUNG UE32D4003BW device:
Installed matrix (LED panel) LTJ320AP02-L or LD320AGC-C4.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the SEM5025 PWM controller. As the power elements of the LED driver, keys of the MDD5N40RH type are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE32D4003BW television is carried out by the BN44-00472A power module, or its analogues using STR-W6053S microcircuits.
MainBoard - the main board (motherboard) is a module BN41-01702A, using microchips SEMS20, 24C256, NTP-7411S and others.
The DTM-8B / 125S BN40-00220A tuner provides television reception and channel tuning.
