Technical description and composition of the SAMSUNG UE19D4010NW TV, panel type and applicable modules. The composition of the modules.SAMSUNG LED
Model: UE19D4010NW UE19D4010
Chassis / Version: U57B / SY01
Panel: LTM185AT04
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9998
Power Supply (PSU): BN44-00448A PD22A0_BDY
PWM Power: GM0765R
MainBoard: BN41-01602A X5_LED_SMALL
IC MainBoard: CPU: SEMS20 + WT61P805, EEPROM: 24C256, DRAM: K4B1G1646G-BCH9
Tuner: BN40-00196A DTOS40FVH082A
Technical Specifications UE19D4010
SAMSUNG UE19D4010NW
General repair guidelines for TV LCD LED
Possible malfunctions
- SAMSUNG UE19D4010NW TV does not turn on, does not respond to the remote control and control panel buttons, does not blink with any indicators.
Often in such cases, the switching power supply - the BN44-00448A module turns out to be faulty. It is necessary to measure its output voltages, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can emergencyly operate in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
A breakdown of the Mos-Fet key in the GM0765R can sometimes be caused by malfunctions of other elements, for example, power supply, frequency setting, damper, as well as elements of the Negative Stabilization Feedback. PWM chip GM0765R, if there is no likely short circuit between the terminals, is checked by replacement.
- There is no image, but there is sound, it responds to the remote. Or the image appears when you turn on and immediately disappears
Failure in most such cases is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, sometimes you can detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 BN41-01602A 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: SEMS20 + WT61P805, DRAM: K4B1G1646G-BCH9 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Malfunction of the tuner BN40-00196A DTOS40FVH082A is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
SCHEMATICS --------------> Samsung UE19D4010NW 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
The appearance of the MainBoard BN41-01602A is shown in the figure below:BN41-01602A
BN41-01602A can be used in TVs:
SAMSUNG UE19D4010NW UE19D4010 (Panel LTM185AT04), SAMSUNG UE22D5000NW UE22D5000 (Panel M215HW01).
The appearance of the power supply
Main features of the SAMSUNG UE19D4010NW device:
Installed matrix (LED-panel) LTM185AT04.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9998 PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE19D4010NW TV is carried out by the BN44-00448A power module, or its analogs using GM0765R microcircuits.
MainBoard - the main board (motherboard) is a BN41-01602A module, using CPU chips: SEMS20 + WT61P805, EEPROM: 24C256, DRAM: K4B1G1646G-BCH9 and others.
Tuner BN40-00196A DTOS40FVH082A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM185AT04-V
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: 12S4P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V