Technical description and composition of the DEXP H32B3100M TV, panel type and applicable modules. The composition of the modules.DEXP LED
Model: H32B3100M
Chassis / Version: TP.VST59S.PB755
Panel: V320BJ7-PE1
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.VST59S.PB755
IC MainBoard: CPU: TSUMV59XES-Z1, SPI Flash: GD25Q32, Audio: TPA3110LD2
Tuner: XF-3SDT-H (R840)
Technical Specifications H32B3100M
DEXP H32B3100M
General repair guidelines for TV LCD LED
Possible malfunctions
- The DEXP H32B3100M TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
In such cases, the main power source - the AC / DC voltage converter, which is combined with the MainBoard TP.VST59S.PB755 board, may turn out to be faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often 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, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the TP.VST59S.PB755 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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: TSUMV59XES-Z1, SPI Flash: GD25Q32 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner XF-3SDT-H (R840) may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to self-repair a DEXP H32B3100M TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> DEXP H32B3100M , Main: TP.VST59S.PB755, Panel: V320BJ7-PE1
The appearance of MainBoard TP.VST59S.PB755 is shown in the figure below:TP.VST59S.PB755
TP.VST59S.PB755 can be used in TVs:
DEXP H32B3100M (Panel V320BJ7-PE1), ERISSON 32LES16 (Panel VVH32L147G22LTY).
Main features of the DEXP H32B3100M device:
Installed matrix (LED-panel) V320BJ7-PE1.
To power the backlight LEDs, a converter is used, combined with the main board TP.VST59S.PB755.
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.VST59S.PB755, using CPU chips: TSUMV59XES-Z1, SPI Flash: GD25Q32, Audio: TPA3110LD2 and others.
Tuner XF-3SDT-H (R840) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: INNOLUX
Model: V320BJ7-PE1
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (2H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.86% (with Polarizer)
Contrast Ratio: 1400
Display Colors: 16.7M (8-bit)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
DEXP H32B3100M TV with V320BJ7-PE1 LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 250 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. Supported media file formats: MP3, WMA, MPEG4, MKV, 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 x2, USB x2. 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, 1360x768.
Overall dimensions: with stand 730x480x200 mm,.
The mass of the TV: 4.2 kg.
Attention! The V320BJ7-PE1 panel of a DEXP H32B3100M 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.