Technical description and composition of the DEXP H32C3200C TV, type of panel and applicable modules. The composition of the modules.DEXP LED
Model: H32C3200C
Chassis / Version: TP.V56.PB816
Panel: C320X15-E8-H
LED backlight: RF-AB320E30-0601S-10 A
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: 70R600 TO-252
MainBoard: TP.V56.PB816
IC MainBoard: CPU: TSUMV56RUU-Z1, SPI Flash: 25Q32CSIG
Technical Specifications H32C3200C
DEXP H32C3200C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The DEXP H32C3200C TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
In such cases, the common power source, the AC / DC voltage converter, which is combined with the elements of the main board TP.V56.PB816, is often faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
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.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- 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.
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 TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the TP.V56.PB816 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Board repair and replacement of CPU chips: TSUMV56RUU-Z1, SPI Flash: 25Q32CSIG 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.
Owners and users of the DEXP H32C3200C TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of MainBoard TP.V56.PB816 is shown in the figure below:TP.V56.PB816
Main features of the DEXP H32C3200C device:
The matrix (LED panel) C320X15-E8-H is installed.
To power the backlight LEDs, a converter is used, combined with the main board TP.V56.PB816.
The power module is combined with the MainBoard and is designed according to the flyback AC / DC voltage converter using PWM SOT23-6 microcircuits and power switches of the 70R600 TO-252 type.
MainBoard - the main board (motherboard) is a TP.V56.PB816 module, using CPU chips: TSUMV56RUU-Z1, SPI Flash: 25Q32CSIG and others.
DEXP H32C3200C TV with C320X15-E8-H LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 220 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 graphic decomposition 720p (HD Ready). Supported media file formats: MP3, WMA, MPEG4, Xvid , DivX, JPEG.
The power of the speaker system is 16 watts (2x8 watts). 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, audio x2, component, VGA, HDMI x2, USB x2. An output for connecting headphones is provided.
Overall dimensions: with stand 730x482x205 mm, without stand 730x434x85 mm.
TV Weight: with stand: 4.2 kg, without stand: 3.3 kg.
Attention! The C320X15-E8-H panel of a DEXP H32C3200C 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.
