Technical description and composition of the DEXP H16B3000ED TV, panel type and applicable modules. The composition of the modules.DEXP LED
Model: H16B3000ED
Chassis / Version: CVMV29L-F
Panel: N156BGE-L21
T-CON: N156BG-L0A
LED driver (backlight): integrated into T-CON
Power Supply (PSU): Adapter 12V
MainBoard: CVMV29L-F
IC MainBoard: CPU: TSUMV59XU-Z1, Flash: Winbond 25Q32BVSIG
Tuner: CDT-3NP5I1-10
Technical Specifications H16B3000ED / A
DEXP H16B3000ED
General repair guidelines for TV LCD LED
Possible malfunctions
- The DEXP H16B3000ED 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.
Often in such cases, the Adapter power module is faulty.
The owner of the TV can purchase an external power supply unit such as Adapter and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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, 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.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. 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.
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 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 CVMV29L-F 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements Cpu: TSUMV59XU-Z1, Flash: Winbond 25Q32BVSIG requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
The malfunction of the tuner CDT-3NP5I1-10 is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to independently repair the DEXP H16B3000ED TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis
CVMV29L-F
FIRMWARE FOR SPI FLASH -----------> DEXP H16B3000ED, Main: CVMV29L-F, Panel: N156BGE-L21
The appearance of the MainBoard CVMV29L-F is shown in the figure below:CVMV29L-F
CVMV29L-F can be used in TVs:
DEXP H24C3000E (Panel CX236DLEDM), DEXP H16B3000ED (Panel N156BGE-L21), DEXP F22B3000E (Panel T215HVN01.1 CX215LEDM), DEXP 16A3000 (Panel N156BGE-L2 1366x768 WXGA ), DEXP 19A3000 (Panel CX185LEDM), DEXP 22A7000 (Panel CX215LEDM), MYSTERY MTV-1628LW (Panel N156BGE-L21), MYSTERY MTV-1629LW (Panel N156BGE-L21), SUPRA STV-LC16741WL (Panel NT156WHM-N12), SUPRA STV-LC16740WL (Panel LTN156AT32).
Main features of the DEXP H16B3000ED device:
Installed matrix (LED-panel) N156BGE-L21.
The matrix control uses the Timing Controller (T-CON) N156BG-L0A.
An integrated LED driver is used to power the backlight LEDs.
An external adapter type 12V is used to power all internal components of the DEXP H16B3000ED TV.
MainBoard - the main board (motherboard) is a CVMV29L-F module, using Cpu chips: TSUMV59XU-Z1, Flash: Winbond 25Q32BVSIG and others.
The tuner CDT-3NP5I1-10 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: N156BGE-L21 61 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Surface: Glare (Haze 0%), Hard coating (3H)
Brightness: 220 cd / m²
Contrast Ratio: 650: 1
Display Colors: 262K (6-bit), CIE1931 60%
Response Time: 3/8 (Tr / Td)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 6-bit), 40 pins
Voltage: 3.3V
The DEXP H16B3000ED / A TV with an N156BGE-E21 LCD, 16 "(41 cm) diagonal, 16: 9 format. This model uses a panel with an end-mounted LED backlight - Edge LED. You can watch programs and movies and images in high HD quality 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 standards 480i, 480p, 576i, 576p, 720p. Supported multimedia file formats Dia:. MP3, MPEG4, JPEG Stereo realized by two built-in speakers using audio NICAM STEREO processing system..
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, 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.
Attention! The N156BGE-E21 panel of a DEXP H16B3000ED / A 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.