Technical description and composition of the DNS E32D18 TV, panel type and modules used. The composition of the modules.DNS LED
Model: E32D18
Chassis / Version: TP.SIS231.PT85
Panel: ST3151A05-5 CX315DLEDM
LED backlight: 01.JL.D3281235-06ES
T-CON: MT3151A05-3-XC-1
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: IC_Power
MainBoard: TP.SIS231.PT85
IC MainBoard: DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
E32D18 Specifications
DNS E32D18
General recommendations for TV LCD LED repair
Possible manifestations of defects
- TV DNS E32D18 does not turn on and does not show any signs of turning on at all. There is no reaction to the control buttons and to the remote control.
A malfunction in such cases, first of all, should be sought in the power elements of a switching power supply (SMPS) - a mains voltage converter (AC / DC), which in this TV model is combined with the main board MainBoard TP.SIS231.PT85. Its output voltages should be measured and, in their absence, checked for the absence of a short circuit in the converters, the serviceability of the power switches and rectifier diodes.
In the event of thermal or avalanche breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often immediately breaks and, less often, the current sensor at the source of the key.
Breakdown of Mos-Fet keys used in switching power supplies is often caused by malfunctions of other elements, for example, supply, frequency setting, damper ... as well as elements of Negative Feedback Stabilization. The PWM regulator (PWM) microcircuit can also cause a malfunction of the power switch of the converter and is usually checked by replacement.
- There is no picture, but there is sound and reaction to commands from the remote control. Or the image appears immediately after switching on and disappears.
The malfunction in most of these cases is found in the nodes and elements of the LED panel backlight. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to identify an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light up one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals the standby mode.
Repair or diagnostics of the TP.SIS231.PT85 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). When repairing an MB board, you need to check its NAND components: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2. Defective elements must be replaced. If chips with BGA soldering technology are used, the problem in its implementation is detected by local heating of the chip.
Once again, we remind TV users: you should not try to repair yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repairs to professionals with sufficient experience in the field of electronic repair.
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Power supply Chassis TP.SIS231.PT85
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> DNS E32D18, Main: TP.SIS231.PT85
The appearance of the MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT85 can be used in TVs:
DNS M39DM8 (Panel V390HJ1-P02 Rev C1), DNS S32DC1 (Panel T320XVD01.0), DNS E32D18 (Panel ST3151A05-5 CX315DLEDM), DNS V32D8100S (Panel LSC320HN04-002), ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1), RUBIN RB-40SE9FT2C (Panel CX400DLEDM), SUPRA STV-LC32T871WL (Panel JHD315GH-E31), SUPRA STV-LC40T871FL (Panel JHD400GF), TELEFUNKEN TF-LED32S26T2 (Panel MT3151A05).
Main features of the DNS E32D18 device:
Installed matrix (LED panel) ST3151A05-5 CX315DLEDM.
Matrix control uses Timing Controller (T-CON) MT3151A05-3-XC-1.
To power the backlight LEDs, a converter combined with the main board TP.SIS231.PT85 is used, controlled by the OB3350CP PWM controller. AOD4454 type keys are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using IC_Power microcircuits.
MainBoard - the main board (motherboard) is a TP.SIS231.PT85 module, using DRAM chips: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
TV DNS E32D18 with LCD ST3151A05-5, diagonal size 32 "(81 cm) 16: 9 format. Dynamic contrast ratio 5000: 1 is achieved by special control of LEDs depending on the illumination of areas in the scene. This model uses a panel with an end the location of the backlight LEDs - Edge LED.
The ST3151A05-5 CX315DLEDM sensor and the MainBoard TP.SIS231.PT85 software provide viewing of images in high quality HD at a resolution of 1366x768 pixels in 720p (HD Ready). The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Graphic processing and formation of a digital signal occurs in the 480i, 480p, 576i, 576p, 720p, 1080i standards. Supported media file formats: MP3, MPEG4, MKV, JPEG. Stereo sound is provided by two built-in speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x3, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768. The digital tuner is capable of receiving television channels in the DVB-T, DVB-C, DVB-T2 standards.
The TV uses a power supply unit as part of the MainBoard.
Dimensions: With stand 720x520x220 mm, Without stand 720x460x80 mm.
Attention! Panel ST3151A05-5 CX315DLEDM LED TV DNS E32D18 is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.