Technical description and composition of the DEXP 19A3100 TV, type of panel and applicable modules. The composition of the modules.DEXP LED
Model: 19A3100
Chassis / Version: CV9202L-T
Panel: CX185LEDM
LED backlight: EDGE LED
LED driver (backlight): integrated into T-CON
Power Supply (PSU): PSU 12V, 5V Integrated
MainBoard: CV9202L-T
IC MainBoard: Cpu: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517
Tuner: ST03WS-2A-E
Specifications 19A3100
DEXP 19A3100
General repair guidelines for TV LCD LED
Possible malfunctions
- The DEXP 19A3100 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.
Often in such cases, the PSU power supply module is faulty. It is necessary to measure its output voltages and, if they are absent, to check the short circuit probability 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), 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, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
Often in such cases, there is no LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the CV9202L-T 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). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - Cpu: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517. Defective components should be replaced.
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 voltage at the terminals of the tuner ST03WS-2A-E. 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.
Attention! For users and owners of 19A3100 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
FIRMWARE FOR SPI FLASH -----------> DEXP 19A3100, Main: CV9202L-T , Panel: CX185LEDM
The appearance of the MainBoard CV9202L-T is shown in the figure below:CV9202L-T
The MainBoard CV9202L-T uses the SPV9202BD processor, W6310GKB-12 RAM, and SPI FLASH 8Mb ROM.
It is advisable to begin repairing the motherboard by checking all voltage converters and linear stabilizers necessary to provide power to the nodes and chips in the operating and standby modes. The processor core is powered by + 1V. Also, for operation of the SPV9202BD, voltages + 2.5V and + 3.3V are required. Check the power of the LCD panel (depending on the type, + 5V or + 12V), it is convenient to measure directly on the LVDS connector. If the TV does not exit Stand-by mode, if it has the necessary power supply voltages, does not respond to the Remote Control and control buttons, the SPI Flash 25Q64 firmware should be updated.
CV9202L-T can be used in TVs:
AIWA 24LE7020 (Panel V236BJ1-P01), BBK 22LEM-1006/FT2C (Panel M215HTN01.1 KM215N19-AU-01), DEXP 19A3100 (Panel CX185LEDM), DEXP 22A7100 (Panel T215HVN01.0 M215HVN01.0), FUSION FLTV-24T22 (Panel M236HGE-P02), FUSION FLTV-22T22 (Panel 720p HD 1366x768), SHIVAKI STV-24LED14 (Panel V236BJ1-P01 / CX236LEDM), SUPRA STV-LC24T410FL (Panel M236HGE-P01), SUPRA STV-LC19T410WL (Panel HK185WLEDM CH25H), SUPRA STV-LC22T410FL (Panel LC215DT5A), SUPRA STV-LC24T410WL (Panel HK236WLEDM-CH24H), SUPRA STV-LC19T880WL (Panel LC185TT7A).
Main features of the DEXP 19A3100 device:
Installed matrix (LED-panel) CX185LEDM.
An integrated LED driver is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the DEXP 19A3100 TV is carried out by the PSU power supply module, or its analogues.
MainBoard - the main board (motherboard) is a CV9202L-T module using Cpu: SPV9202BD, DDRAM: W6310GKB-12, Spi Flash: 25Q64, SOUND: YD1517 and others.
The ST03WS-2A-E tuner provides TV reception and channel tuning.
A DEXP 19A3100 TV with a CX185LEDM LCD display, a 19 "(48 cm) diagonal size of 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlight LED. Contrast - the ratio of maximum brightness to minimum is 1000: 1. In this the model uses a panel with the end position of the backlight LEDs - Edge LED. You can watch programs and movies and images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal is decoded into analog . Govyh systems PAL, SECAM, NTSC Image processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p Supported multimedia file formats:. MP3, JPEG.
The power of the sound system 6 W (2x3 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), component, SCART, VGA, HDMI, 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 standards.
Overall dimensions: with stand 434x274x138 mm, without stand 434x274x53 mm.
TV Weight: with stand: 4.69 kg, without stand: 3.71 kg.
Attention! The CX185LEDM panel of a DEXP 19A3100 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.
