Technical description and composition of the SAMSUNG UE19F4000 TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE19F4000 UE19F4000AK
Panel: LTM185AT05
LED backlight: SLED SMME185BMM001 L21 HF REV01
T-CON: LTM185AT05S2LV0.5_HF
LED driver (backlight): integrated into MainBoard
PWM LED driver: SLC5013R
MOSFET LED driver: AOD464
Power Supply (PSU): Adapter 14V, 2.5A BN44-00592B A3514_DPN
MainBoard: BN41-01987B BN94-07222Z
IC MainBoard: SENK14, K4B2G1646C, F59L1G81A, W25Q40, 24C256
Tuner: BN40-00261B
Technical Specifications UE19F4000
SAMSUNG UE19F4000
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SAMSUNG UE19F4000 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the Adapter module, is faulty.
This TV model is equipped with an external power adapter type Adapter 14V, 2.5A BN44-00592B A3514_DPN, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is some sense to open it and eliminate simple typical defects, characteristic for IIP. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits are usually checked by replacement with new ones, or known to be working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01987B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SENK14, K4B2G1646C, F59L1G81A, W25Q40, 24C256 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-00261B 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
FIRMWARE SAMSUNG UE19F4000AW Main Board: MAIN:BN41-01987, Panel: HT185WX1-300 -
FIRMWARE FOR SPI FLASH ------------> SAMSUNG UE19F4000 UE19F4000AK , Main: BN41-01987, Panel: HT185WX1-300
The appearance of the MainBoard BN41-01987B is shown in the figure below:BN41-01987B
BN41-01987B can be used in TVs:
SAMSUNG LT19C350EX T19C350EX (Panel HT185WX1-300), SAMSUNG UE19F4000 UE19F4000AK (Panel LTM185AT05).
Main features of the SAMSUNG UE19F4000 device:
Installed matrix (LED panel) LTM185AT05.
The matrix control uses the Timing Controller (T-CON) LTM185AT05S2LV0.5_HF.
To power the backlight LEDs, a converter is used, combined with the main board BN41-01987B, controlled by the SLC5013R PWM controller. As the power elements of the LED driver, keys of the AOD464 type are used.
To power all the internal components of the SAMSUNG UE19F4000 TV, an external source such as Adapter 14V, 2.5A BN44-00592B A3514_DPN is used.
MainBoard - the main board (motherboard) is a BN41-01987B module, using microchips SENK14, K4B2G1646C, F59L1G81A, W25Q40, 24C256 and others.
The tuner BN40-00261B provides the reception of television programs and tuning to channels.
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