Technical description and composition of the DEXP H32D8100H TV, type of panel and applicable modules. The composition of the modules.DEXP LED
Model: H32D8100H
Chassis / Version: TP.MS6486T.PB732
Panel: JHD315N2H81
LED backlight: JL.D32061330-003BS-M
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS6486T.PB732
Control: 308.01869.035 WU182-LO REV.035 (XD)
Technical Specifications H32D8100H
DEXP H32D8100H
General repair guidelines for TV LCD LED
Possible malfunctions
- DEXP H32D8100H does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
The malfunction in such cases should be sought in the elements of the power source - the network voltage converter (AC / DC), which is located on the MainBoard TP.MS6486T.PB732 main board. It is necessary to measure its output voltages and, if they are absent, to check for short-circuit probabilities in the converters, power switches and rectifier diodes.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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 an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The most likely in these cases is a malfunction of the LED 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 check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the TP.MS6486T.PB732 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).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
The appearance of MainBoard TP.MS6486T.PB732 is shown in the figure below:TP.MS6486T.PB732
Main features of the DEXP H32D8100H device:
Installed matrix (LED-panel) JHD315N2H81.
To power the backlight LEDs, a converter is used, combined with the main board TP.MS6486T.PB732.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a module TP.MS6486T.PB732.
DEXP H32D8100H TV with JHD315N2H81 LCD, 32 "(81 cm) diagonal size of 16: 9 format. The required screen brightness of 180 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 3000: 1. In LCD -panels use direct LED backlighting with Direct LEDs, and you can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard graphic decomposition 720p (HD Ready).
The H32D8100H is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound system 12 W (2x6 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi. An output for connecting headphones is provided. The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
The power consumed by the TV working in the network mode is 50 watts.
Overall dimensions: with stand 734x474x171 mm, without stand 734x434x93 mm.
TV Weight: with stand: 4.4 kg, without stand: 4.3 kg.
Attention! The JHD315N2H81 panel of a DEXP H32D8100H 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.
