Technical description and composition of the SAMSUNG UE19D4003BN TV, type of panel and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE19D4003BN UE19D4003BW
Chassis / Version: U57B
Panel: LTM185AT05
LED driver (backlight): BN44-00467A
PWM LED driver: OZ9998BGN (16)
Power Supply (PSU): BN44-00467A
PWM Power: GM0765R (5), STM4886 (8)
MainBoard: BN41-01703A
IC MainBoard: NTP-7411S, SPI Flash: 25X40BVSIC, EEPROM: 24C256
Tuner: BN40-00220A DTM-8B / 125S
Technical Specifications UE19D4003
SAMSUNG UE19D4003BN
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the SAMSUNG UE19D4003BN TV, as well as the external elements of the case. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. 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 the absence of any signs of operability, when the SAMSUNG UE19D4003BN 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 TV's BN44-00467A power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM GM0765R (5), STM4886 (8) from the manufacturer.
If the SAMSUNG UE19D4003BN does not have an image, but there is sound, the backlight LEDs of the panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
In most cases where there is no backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
An open in the LED lines connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
On the BN41-01703A motherboard, in case 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).
In cases where there is no tuning to the local television channels, make sure that the voltage of the varicaps (30-33V) and other supply voltages on the terminals of the tuner BN40-00220A DTM-8B / 125S are present.
Attention to users! Self-repair of a SAMSUNG UE19D4003BN TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATICS ----------> Samsung UE19D4003 Chassis U57B.
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.
FIRMWARE SPI FLASH -------------> SAMSUNG UE19D4003BW U57B, Main: BN41-01703A, Panel: LTM185AT05
The appearance of the MainBoard BN41-01703A is shown in the figure below:BN41-01703A
BN41-01703A can be used in TVs:
SAMSUNG UE19D4003BN UE19D4003BW (Panel LTM185AT05), SAMSUNG UE22D5003 (Panel LTM215HT04-V (BN07-01044A)).
The appearance of the power supply
Main features of the SAMSUNG UE19D4003BN device:
Installed matrix (LED panel) LTM185AT05.
The LED driver BN44-00467A is used to power the backlight LEDs, it is controlled by the OZ9998BGN PWM controller (16).
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE19D4003BN TV is carried out by the BN44-00467A power module or its analogs using GM0765R (5), STM4886 (8) microcircuits.
MainBoard - the main board (motherboard) is a BN41-01703A module, using NTP-7411S chips, SPI Flash: 25X40BVSIC, EEPROM: 24C256 and others.
The BN40-00220A DTM-8B / 125S tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM185AT05
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 7S3P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
