Technical description and composition of the TV AIWA 40LE4120, panel type and applicable modules. The composition of the modules.AIWA LED
Model: 40LE4120
Chassis / Version: V1R06
Panel: RDL400FY
LED driver (backlight): integrated into MainBoard
PWM LED driver: SMD 16pin
Power Supply (PSU): integrated into MainBoard
PWM Power: SMD 8pin
MainBoard: 5800-A6M32G-0P10
IC MainBoard: Winbond 25Q64
Tuner: CH DM121 C816RH
Specifications 40LE4120
AIWA 40LE4120
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 40LE4120 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
In such cases, the AC / DC voltage converter is often faulty, which is combined with the main board 5800-A6M32G-0P10. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement 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
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.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 5800-A6M32G-0P10 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 Winbond 25Q64 chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
The malfunction of the tuner CH DM121 C816RH 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.
Attention to users! Self-repair of the TV AIWA 40LE4120 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> AIWA 40LE4120 V1R06, Main: 5800-A6M32G-0P10, Panel: RDL400FY
The appearance of the MainBoard 5800-A6M32G-0P10 is shown in the figure below:5800-A6M32G-0P10
5800-A6M32G-0P10 can be used in TVs:
AIWA 40LE4120 (Panel RDL400FY), AIWA 40LE5120 (Panel RDL400FY(QDO-400)).
Key Features of AIWA 40LE4120:
Installed matrix (LED-panel) RDL400FY.
To power the backlight LEDs, a converter is used, combined with the main board 5800-A6M32G-0P10, controlled by a 16pin SMD PWM controller.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter using SMD 8pin microcircuits.
MainBoard - the main board (motherboard) is a 5800-A6M32G-0P10 module, using Winbond 25Q64 chips and others.
The CH DM121 C816RH tuner provides TV reception and channel tuning.
Trademark: AIWA, Model: 40LE4120.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, sound: 12 W, HDMI: 2.
The composition uses the MainBoard 5800-A6M32G-0P10 and the LCD panel (matrix) RDL400FY. The power supply is combined with the MainBoard.
AIWA 40LE4120 TV with RDL400FY LCD, 40 "(102 cm) diagonal, 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 100,000: 1 is achieved by special control of the LEDs. In this model uses side lighting from Edge LEDs.
The RDL400FY panel and the software of the 5800-A6M32G-0P10 motherboard provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
Supported media file formats: MP3, WMA, MPEG4, JPEG.
The power of the sound system 12 W (2x6 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, VGA, HDMI x2, USB. An output for connecting headphones is provided. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: with stand 907x562x207 mm, without stand 907x523x93 mm.
TV Weight: with stand: 8.1 kg, without stand: 7.7 kg.
Attention! The panel of the RDL400FY AIWA 40LE4120 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.