Technical description and composition of the AIWA 26LE3120 TV, panel type and modules used. The composition of the modules.AIWA LED
Model: 26LE3120
Chassis / Version: KDL26MS18
Panel: V260H1-P03 REV.C2
LED backlight: KPL + 260B1CE04 * 35015915
T-CON: V260H1-XC03
LED driver (backlight): KDL + L021E08-01
Power Supply (PSU): KPS-L060C2-01
PWM Power: FSQ0765
MainBoard: 35015596 KDL26MS180
Tuner: NoName
Control: IR: 2418 * 35015685 MW-R4 ILM-R1 MST139KE * 35014983
Specifications 26LE3120
AIWA 26LE3120
General recommendations for TV LCD LED repair
Possible malfunctions
- TV AIWA 26LE3120 does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.
Usually with similar manifestations, the defect is caused by faulty elements in the main power module KPS-L060C2-01. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches and rectifier diodes for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work in an emergency in the short-circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. Chips PWM (PWM) FSQ0765 are usually checked by replacing them with new ones, or known to be working properly.
- There is no picture, but there is sound and all other TV functions are working. The image sometimes appears for a second immediately after switching on and disappears.
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the health of the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED separately with a simple Chinese multimeter (powered by 9 volts) in the P-N transition test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black one to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. The serviceability of the PN junction of the Zener diode indirectly indicates the serviceability of the LED-a
- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.
If the AIWA 26LE3120 has no picture, but there is sound, often the display backlight V260H1-P03 REV.C2 simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the LCD panel V260H1-P03 - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard 35015596 also turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from MainBoard 35015596 with an oscilloscope, as well as synchronizing signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED-TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.
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Repair or diagnostics of the motherboard 35015596 should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software).
Attention! Users and owners of 26LE3120 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
Additional MainBoard RepairThe appearance of MainBoard 35015596 is shown in the figure below:
35015596
External view of the power supply
Main features of the AIWA 26LE3120 device:
The matrix (LED-panel) V260H1-P03 REV.C2 is installed.
Matrix control uses Timing Controller (T-CON) V260H1-XC03.
The LED driver KDL + L021E08-01 is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the AIWA 26LE3120 TV is carried out by the KPS-L060C2-01 power module, or its analogs using FSQ0765 microcircuits.
MainBoard - The main board (motherboard) is a 35015596 module.
Tuner NoName provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V260H1-P03
Type: a-Si TFT-LCD, CELL
Diagonal size: 26.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 576x324 mm
Surface: Antiglare, Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 6.1% (with Polarizer)
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.4 / 3.6 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
AIWA 26LE3120 TV with LCD V260H1-P03, 26 "(66 cm) 16: 9. The required brightness of the screen 360 cd / m² is provided by LED backlighting. This model uses edge LED backlighting.
V260H1-P03 REV.C2 panel and motherboard software 35015596 allow viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and formation of a digital signal occurs in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards.
Supported media file formats: MP3, JPEG.
Speaker power 10 W (2x5 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, VGA, HDMI, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving TV channels in DVB-T MPEG4 standards.
Attention! Panel V260H1-P03 REV.C2 of LED TV AIWA 26LE3120 is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.