Technical description and composition of the TV AIWA 24LE7021, type of panel and applicable modules. The composition of the modules.AIWA LED
Model: 24LE7021
Chassis / Version: V2P12
Panel: V236BJ1-P03
LED driver (backlight): integrated into MainBoard
PWM LED driver: SN51DP
MOSFET LED driver: ME15N-10G
Power Supply (PSU): integrated into MainBoard
PWM Power: LD5530
MainBoard: TP.S512.PA63
IC MainBoard: S2T512, 25Q64, CD1517CP
Tuner: XF-3SDT-H (R840)
Specifications 24LE7021
AIWA 24LE7021
General repair guidelines for TV LCD LED
Possible malfunctions
- The AIWA 24LE7021 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.
In such cases, the AC / DC converter of the mains voltage, which is combined with the main board TP.S512.PA63, is often faulty. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often 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) LD5530, 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. Or the image may appear for a second when turned on and immediately disappears.
As a rule, in such cases there is no display backlight. 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.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
- The indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the TP.S512.PA63 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - S2T512, 25Q64, CD1517CP. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
The malfunction of the tuner XF-3SDT-H (R840) 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> SUPRA STV-LC22T800FL Chassis TP.S512.PA63
FIRMWARE FOR SPI FLASH -----------> AIWA 24LE7021 V2P12, Main: TP.S512.PA63, Panel: V236BJ-P03
The appearance of MainBoard TP.S512.PA63 is shown in the figure below:TP.S512.PA63
TP.S512.PA63 can be used in TVs:
AIWA 24LE7021 (Panel V236BJ1-P03), ERISSON 22LES71T2 (Panel A215EE1TBA-9), FUSION FLTV-24H100T (Panel CM238C01), SUPRA STV-LC22T800FL (Panel C215F14-E1-P), THOMSON T24E14DF-01B (Panel HM236WU3-101).
Key Features of AIWA 24LE7021:
Installed matrix (LED panel) V236BJ1-P03.
To power the backlight LEDs, a converter is used, combined with the TP.S512.PA63 main board, controlled by the SN51DP PWM controller. As the power elements of the LED driver, keys of the type ME15N-10G are used.
The power module is combined with MainBoard and is made according to the flyback AC / DC voltage converter circuit using LD5530 microcircuits.
MainBoard - the main board (motherboard) is a TP.S512.PA63 module, using S2T512, 25Q64, CD1517CP chips, and others.
Tuner XF-3SDT-H (R840) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: INNOLUX
Model: V236BJ1-P03
Type: a-Si TFT-LCD, CELL
Diagonal size: 23.6 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 521.471x293.184 mm
Surface: Antiglare (Haze 1%)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.8% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Trademark: AIWA, Model: 24LE7021.
Briefly from the TV: LCD, LED backlight, 24 ", 1366x768, 720p HD, DVR, sound: 6 watts.
The composition uses MainBoard TP.S512.PA63 and the LCD panel (matrix) V236BJ1-P03. The power supply is combined with the MainBoard.
AIWA 24LE7021 TV with V236BJ1-P03 LCD, 24 "(61 cm) diagonal size in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 60,000: 1 is achieved by special control of the LEDs. V This model uses side lighting from Edge LEDs.
The V236BJ1-P03 panel and TP.S512.PA63 motherboard software provide high-definition HD 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 the standards 480i, 480p, 576i, 576p, 720p, 1080i.
Supported media file formats: MP3, WMA, MPEG4, JPEG.
The power of the sound system 6 W (2x10 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, 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-T2 standards.
Overall dimensions: with stand 550x401x174 mm, without stand 550x342x48 mm.
TV Weight: with stand: 3.34 kg, without stand: 3.05 kg.
Attention! The V236BJ1-P03 panel of the AIWA 24LE7021 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.
