Technical description and composition of the DEXP 32A3200 TV, panel type and applicable modules. The composition of the modules.DEXP LED
Model: 32A3200
Chassis / Version: JUC7.820.00108763
Panel: C320X13-E7-H
T-CON: MT3151A05-5-XC-5; CS11103, 4032A, CS902, CS801
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT-23-6
MainBoard: JUC7.820.00108763
IC MainBoard: MSD308BT-SW, MSB101A, H5TQ1G63EFR, GD25Q64BSIG, TPA3110D2
Tuner: DT21VX-2A-B // DT21WN-2A-E
Control: IR: JUC7.820.00081814 JUC7.820.00104950
Specifications 32A3200
DEXP 32A3200
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The DEXP 32A3200 TV does not turn on. There is no reaction to the remote control and to the control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, a switching power supply usually fails, which in this model of the TV is combined with the main board (MainBoard). It is necessary to measure the output voltages in the secondary circuits, 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 supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM SW-23-6 PWM chip may also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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 of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the JUC7.820.00108763 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 microcircuits MSD308BT-SW, MSB101A, H5TQ1G63EFR, GD25Q64BSIG, TPA3110D2 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.
Before changing the tuner DT21VX-2A-B // DT21WN-2A-E, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
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.
FIRMWARE FOR SPI FLASH -----------> , EEPROM DEXP 32A3200, Main: JUC7.820.00108763, Panel: C320X13-E7-H(G1)
FIRMWARE FOR SPI FLASH -----------> DEXP 32A3200, Main: JUC7.820.00108763
FIRMWARE FOR SPI FLASH -----------> DEXP 32A3200, Main: TP.S512.PB83 Panel: C320X13-E7-A
The appearance of the MainBoard JUC7.820.00108763 is shown in the figure below:JUC7.820.00108763
JUC7.820.00108763 can be used in TVs:
DEXP 40A7000 (Panel C400F13-E2-C), DEXP 32A3200 (Panel C320X13-E7-H).
Main features of the DEXP 32A3200 device:
The matrix (LED panel) C320X13-E7-H is installed.
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-5 ;.
A converter is used to power the backlight LEDs, combined with the main board JUC7.820.00108763.
The power module is combined with MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT-23-6 microcircuits.
MainBoard - the main board (motherboard) is a JUC7.820.00108763 module, using microchips MSD308BT-SW, MSB101A, H5TQ1G63EFR, GD25Q64BSIG, TPA3110D2 and others.
Tuner DT21VX-2A-B // DT21WN-2A-E provides the reception of television programs and tuning to channels.
DEXP 32A3200 TV with C320X13-E7-H LCD, 32 "(81 cm) diagonal size of 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast - the ratio of maximum brightness to minimum is 3000: 1. The LCD panel uses direct pixel illumination with rear LEDs - Direct LED. You can watch broadcasts and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal is decoded in analog 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, DivX, JPEG.
The power of the sound system 10 W (2x5 W) provides 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, audio x2, component, VGA, HDMI x3, USB. 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, DVB-T2 standards.
Overall dimensions: with stand 736x472x219 mm, without stand 736x439x94 mm.
TV Weight: 5.8 kg.
Attention! The C320X13-E7-H panel of a DEXP 32A3200 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.
