Technical description and composition of the AIWA 20LE7011 TV, type of panel and applicable modules. The composition of the modules.AIWA LED
Model: 20LE7011
Chassis / Version: V1N04
Panel: M195FGE-P03 HK195WLEDM-CH05H
LED backlight: HKC-195-4014S-90MA 9S4P E1950904 4014DS-H 1.14 BLHE19500 36led
LED driver (backlight): integrated into MainBoard
PWM LED driver: BIT3250
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6 (LD7536R)
MOSFET Power: 7N65AZ
MainBoard: CV59L-A23
IC MainBoard: CPU: TSUMV59XU-Z1, SPI Flash: 25Q32,
Tuner: CDT-3NP5I1-10
Specifications 20LE7011
AIWA 20LE7011
General repair guidelines for TV LCD LED
Possible malfunctions
- AIWA 20LE7011 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
The malfunction in such cases, first of all, should be sought in the power elements of a switching power supply (IIP) - a network voltage converter (AC / DC), which in this TV model is combined with the MainBoard CV59L-A23 main board. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (7N65AZ) and the rectifier diodes of the converters for a short circuit probability.
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 power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM SOT23-6 (LD7536R) PWM controllers, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- 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
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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 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, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the CV59L-A23 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). When repairing an MB board, you need to check its CPU components: TSUMV59XU-Z1, SPI Flash: 25Q32,. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner CDT-3NP5I1-10 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.
TV users and owners need to remember that attempts to self-repair an AIWA 20LE7011 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> AIWA 20LE7011 V1N04, Main: CV59L-A23, Panel: M195FGE-P03.
FIRMWARE FOR SPI FLASH -----------> AIWA 20LE7011 V1N06, Main: CV59L-A23.
FIRMWARE FOR SPI FLASH -----------> AIWA 20LE7011 V1N08, Main: TP.VST59.PA502, Panel: M195FGE-P03
The appearance of the MainBoard CV59L-A23 is shown in the figure below:CV59L-A23
CV59L-A23 can be used in TVs:
AIWA 20LE7011 (Panel M195FGE-P03 HK195WLEDM-CH05H), AIWA 20LE7010 (Panel HK195WLEDM-CH05H (M195FGE-P03)), Elenberg 22AH4010 (Panel HK215WLEDM-DH19H).
Key Features of AIWA 20LE7011:
Installed matrix (LED panel) M195FGE-P03 HK195WLEDM-CH05H.
To power the backlight LEDs, a converter is used, combined with the CV59L-A23 main board, controlled by the BIT3250 PWM controller.
The power module is combined with the MainBoard and is designed according to a flyback AC / DC voltage converter using PWM SOT23-6 (LD7536R) microcircuits and 7N65AZ type power switches.
MainBoard - the main board (motherboard) is a CV59L-A23 module, using CPU chips: TSUMV59XU-Z1, SPI Flash: 25Q32, and others.
The tuner CDT-3NP5I1-10 provides the reception of television programs and tuning to channels.
Trademark: AIWA, Model: 20LE7011.
Briefly from the TV: LCD, LED backlight, 20 ", 1366x768, 720p HD, sound: 6 watts.
The composition includes MainBoard CV59L-A23 and LCD panel (matrix) M195FGE-P03 HK195WLEDM-CH05H. The power supply is combined with the MainBoard.
AIWA 20LE7011 TV with an M195FGE-P03 LCD display, diagonal size 20 "(51 cm) in 16: 9 format. The required screen brightness of 220 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs. This model uses side lighting from Edge LEDs.
The M195FGE-P03 HK195WLEDM-CH05H panel and the CV59L-A23 motherboard software provide high-definition image viewing at 1366x768 pixels in the 720p (HD Ready) graphic decomposition standard. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, 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), AV, 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.
Overall dimensions: 457x342x139 mm.
Mass of the TV: 2.4 kg.
Attention! The panel of M195FGE-P03 HK195WLEDM-CH05H of the AIWA 20LE7011 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.
