Technical description and composition of the SAMSUNG UE40D5500 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE40D5500 UE40D550K1W UE40D5500RW
Chassis / Version: U66A
Panel: LD400BGB-A2 // LD400BGC-C2
T-CON: 31T09-COM T315HW04 VB CTRL BD AOU-12306 (1051A0608), UZ-554DT06C10-13L-1002643
LED driver (backlight): integrated into PSU
PWM LED driver: SLC3011M
MOSFET LED driver: FDT3N40
Power Supply (PSU): BN44-00422B
PWM Power: 3BR1765JZ (Standby = XK131021X01), ICE1HS01G (PWM resonant)
MOSFET Power: 5N50, K8A50D
MainBoard: BN41-01660B (BN94-05225M)
IC MainBoard: SEMS21 1108A-LF
Tuner: DT0S40FVH082A BN40-00196A
Control: IR: D550_12C BN41-01600A REV1.2 (ET101202)
Technical Specifications UE40D5500
SAMSUNG UE40D5500
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the SAMSUNG UE40D5500 TV, it is advisable to start with an external examination of its external and internal elements. Sometimes, according to visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In cases where the SAMSUNG UE40D5500 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the BN44-00422B power supply module is most likely faulty or missing processor power on the motherboard (a typical defect in some SAMSUNG TVs). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), the mains fuse must first be checked. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
If the SAMSUNG UE40D5500 has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LD400BGB-A2 panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
On the motherboard BN41-01660B (BN94-05225M), in the event of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
Repairing the board and replacing the SEMS21 1108A-LF microchips is carried out with the necessary equipment, and the corresponding elemental base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before replacing the DT0s40FVH082A tuner, if there is no tuning for the channels, you must first check the power supply voltage at its terminals, including the power supply of varicaps (30-33V).
It should be remembered! Attempts to repair the SAMSUNG UE40D5500 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-repairability of the device!
SCHEMATIC MANUAL --------------> Samsung UE40D5500 Chassis U66A.
Chassis : U66A Model : UE32D55**R*, UE37D55**R*, UE40D55**R*, UE46D55**R*, UE32D57**RS, UE37D57**RS, UE40D57**RS, UE46D57**RS
Chassis : U57A Model : UE32D50**PW, UE37D50**PW, UE40D50**PW, UE46D50**PW, UE32D40**NW
Chassis : U57B Model : UE19D40**NW, UE22D50**NW, UE27D50**NW
PSU SCHEMATIC ------------> BN44-00422B Power.
UE40D550K1W - PANEL : LTF400HM03, MAINBOARD: BN94-05106B, Power BN44-00440A, T-CON S100FAPC2LV0.3, Tuner: BN40-00197A.
Samsung UE40D5500RW Panel: LD400BGC-C2, T-con: V460HJ1-C01,
Backlight LED: 2011SVS40-FHD-5K6K-RIGHT JVG4-400SMB-R1[10.11.09], 2011SVS40-FHD-5K6K-LEFT JVG4-400SMA-R1[10.11.09]
The appearance of the MainBoard BN41-01660B is shown in the figure below:BN41-01660B
BN41-01660B can be used in TVs:
SAMSUNG UE40D5500 UE40D550K1W UE40D5500RW (Panel LD400BGB-A2), SAMSUNG UE37D5520RW UE37D5520 (Panel LD370BGB-C1), SAMSUNG UE37D5500 RW (Panel LD370BGB-C1).
PSU Advanced
The power module BN44-00422B is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on a 1HS01G PWM controller that evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG UE40D5500 device:
Installed matrix (LED panel) LD400BGB-A2 or LD400BGC-C2.
The matrix control uses the Timing Controller (T-CON) 31T09-COM.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the SLC3011M PWM controller. As power elements of the LED driver, keys of the FDT3N40 type are used.
The necessary supply voltages for all nodes of the SAMSUNG UE40D5500 TV are generated by the BN44-00422B power module or its analogs using 3BR1765JZ microcircuits (Standby = XK131021X01), ICE1HS01G (PWM resonant) and power switches of the 5N50, K8A50D type.
MainBoard - the main board (motherboard) is a BN41-01660B module, using SEMS21 1108A-LF chips and others.
The tuner DT0S40FVH082A BN40-00196A provides the reception of television programs and tuning to channels.
