Technical description and composition of the HYUNDAI DLH-32285 TV, panel type and applicable modules. The composition of the modules.HYUNDAI LED
Model: DLH-32285
Chassis / Version: 17MB95S-1
Panel: VES315WNDS-01 // LSC320AP01-L03
LED driver (backlight): integrated into PSU
PWM LED driver: MP3394
Power Supply (PSU): 17IPS11
PWM Power: SG6742HR
MainBoard: 17MB95S-1
IC MainBoard: H27U2G8F2CTR, MX25L1606E, TAS5719
Technical Specifications DLH-32285
HYUNDAI DLH-32285
General repair guidelines for TV LCD LED
Possible manifestations of defects
- HYUNDAI DLH-32285 does not turn on and does not show any signs of operability. Does not blink indicators and does not respond to any control buttons.
Often in such cases, the 17IPS11 power module is faulty. It is necessary to measure the 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 a short circuit in the 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, power, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip of the SG6742HR can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode 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 17MB95S-1 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). Board repair and replacement of H27U2G8F2CTR, MX25L1606E, TAS5719 microcircuits are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the Tuner tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
For owners of the DLH-32285 TV, we recommend that you contact qualified personnel with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
Service manual and schematic diagram ------------> PHILIPS PFL3008H Chassis 17MB95S-1
To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).
The appearance of the MainBoard 17MB95S-1 is shown in the figure below:17MB95S-1
17MB95S-1 can be used in TVs:
HYUNDAI DLH-32285 (Panel VES315WNDS-01), PHILIPS 40PFL3008H/12 (Panel VES400UNDS-03).
The appearance of the power supply
Main features of the device HYUNDAI DLH-32285:
Installed matrix (LED-panel) VES315WNDS-01 or LSC320AP01-L03.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the MP3394 PWM controller.
The necessary supply voltages for all nodes of the HYUNDAI DLH-32285 TV are generated by the 17IPS11 power supply module or its analogs using SG6742HR microcircuits.
MainBoard - the main board (motherboard) is a 17MB95S-1 module, using H27U2G8F2CTR, MX25L1606E, TAS5719 and others.
HYUNDAI DLH-32285 TV with VES315WNDS-01 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 350 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100000: 1 is achieved by special control of LEDs The LED-panel of this TV is equipped with end LED backlighting - Edge LED. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready).
The DLH-32285 is equipped with SMART software, integrated applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 12 W (2x6 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, SCART, VGA, HDMI x2, USB, Ethernet (RJ-45). An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
Overall dimensions: with stand 744x490x185 mm, without stand 744x451x90 mm.
TV Weight: with stand: 6.59 kg, without stand: 6.3 kg.
Attention! The VES315WNDS-01 panel of the HYUNDAI DLH-32285 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.
