Technical description and composition of the DIGITAL DLE-2221 TV, type of panel and applicable modules. The composition of the modules.DIGITAL LED
Model: DLE-2221
Chassis / Version: LA.M182VG.B3 1352
Panel: LTM215HT04
T-CON: LTM215HT04 S2LV0.1_HF
PWM LED driver: SAQ8818
Power Supply (PSU): Adapter 12V
MainBoard: LA.M182VG.B3 1352
IC MainBoard: MST6E182VG-LF-TZ, 25Q32BVS1G, YD1517P
Tuner: TNF903SHR-BF-1
DIGITAL LED
Model: DLE-2221
Chassis / Version: MST6M48V3.0-B
Panel: HT215F01-100
LED driver (backlight): SAQ8818 (IC1)
MainBoard: MST6M48V3.0-B
IC MainBoard: NT5TU32M16DG-AC, MX25L3206E, SA7454,
Tuner: AFT7 / W110G
Technical Specifications DLE-2221
DIGITAL DLE-2221
General repair guidelines for TV LCD LED
Possible manifestations of defects
- DIGITAL DLE-2221 does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
In most of these cases, the main switching power supply is faulty. It is necessary to measure its secondary output voltages, 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, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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.
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. Then you need to open the panel and check separately each LED with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- 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 MST6M48V3.0-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). 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 - NT5TU32M16DG-AC, MX25L3206E, SA7454, and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before replacing the AFT7 / W110G tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
It should be remembered! Attempts to independently repair the DIGITAL DLE-2221 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!Edge LED backlight, Diagonal of 22 inches (56 cm), Screen format 16: 9, Resolution 1920x1080, Support 1080p Full HD, Light-emitting diode (LED), Brightness 600 cd / m2, Dynamic contrast ratio 15000: 1, Viewing angle 178 °, Response time 4 ms pixel
Repair MainBoard
The appearance of the MainBoard JPE-MST718 is shown in the figure below:
JPE-MST718
JPE-MST718 can be used in TVs:
DIGITAL DL-15J82 (Panel M150XN07), DIGITAL DL-20J80 (Panel SVA201VG01TB), DIGITAL DL-20J85 (Panel M201EW02), DIGITAL DL-26J82 (Panel T260XW02), DIGITAL DL-32J82 (Panel T315XW02).
Main features of the DIGITAL DLE-2221 device:
Installed matrix (LED panel) HT215F01-100.
The LED driver SAQ8818 (IC1) is used to power the backlight LEDs.
The required supply voltage for all nodes of the TV DIGITAL DLE-2221 provides a switching power supply.
MainBoard - main board (motherboard board) is a module MST6M48V3.0-B, using chips NT5TU32M16DG-AC, MX25L3206E, SA7454, and others.
The AFT7 / W110G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: BOE
Model: HT215F01-100
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 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: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
