Technical description and composition of the DIGITAL DLE-1621 TV, type of panel and applicable modules. The composition of the modules.DIGITAL LED
Model: DLE-1621
Chassis / Version: TSUX6V5.1-B
Panel: LTN156AT17
Power Supply (PSU): Adapter
MainBoard: TSUX6V5.1-B
IC MainBoard: TSUMV26KU-LF A6MH393B, 24C32, EN25F40-100GCP, SA7454
Tuner: AFT7 / W110G
Technical Specifications DLE-1621
DIGITAL DLE-1621
General repair guidelines for TV LCD LED
Possible malfunctions
- The DIGITAL DLE-1621 TV does not turn on at all. There is no reaction to the remote control or to the control buttons from the front panel. Indicator lights do not light or flash.
Failure in such cases should be sought in the adapter power supply circuits.
The external adapter power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to measure its secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the main fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
In most cases, the malfunction is caused by the lack of a backlight display. 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 check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the TSUX6V5.1-B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TSUMV26KU-LF A6MH393B, 24C32, EN25F40-100GCP, SA7454 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before changing the AFT7 / W110G tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
It should be remembered! Attempts to independently repair the DIGITAL DLE-1621 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!
Backlight Edge LED, Diagonal of 16 inches (41 cm), Aspect ratio 16: 9, Resolution 1366x768, Support HD 720p, Brightness 400 cd / m2, Dynamic contrast 15000: 1, Viewing angle 170 °, Response time 4 msMain features of the DIGITAL DLE-1621 device:
Installed matrix (LED panel) LTN156AT17.
To power all internal nodes of the DIGITAL DLE-1621 TV, an external adapter type source is used.
MainBoard - the main board (motherboard) is a TSUX6V5.1-B module, using TSUMV26KU-LF A6MH393B, 24C32, EN25F40-100GCP, SA7454, and others microcircuits.
The AFT7 / W110G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTN156AT17-103
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Surface: Hard coating (3H)
Brightness: 220 cd / m²
Contrast Ratio: 500: 1 (Min.)
Display Colors: 262K (6-bit), CIE1931 60%
Response Time: 16 (Tr + Td)
Frequency: 60Hz
Lamp Type: 9S4P WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 6-bit), 40 pins
Voltage: 3.3V
