Technical description and composition of the AKAI LEA-29C16M TV, panel type and applicable modules. The composition of the modules.AKAI LED
Model: LEA-29C16M
Chassis / Version: 868M
Panel: ECG290MA-LZ1 (RP)
T-CON: V290BJ1-XC01; CM1801B, CM501, CM601, P2003EV6
LED driver (backlight): integrated into PSU
PWM LED driver: OB3350CP
MOSFET LED driver: TK40P03M, LP18N20
Power Supply (PSU): R-HS060D-3HF04
PWM Power: NCP1251 (PWM SOT23-6 5A ...)
MOSFET Power: JCS7N65FB
MainBoard: JUG7.820.1221
IC MainBoard: EN25Q32B-104HIP, TPA3110D2
Tuner: DWE-7053DW-PLL3
Technical Specifications LEA-29C16M
AKAI LEA-29C16M
General repair guidelines for TV LCD LED
Possible malfunctions
- The AKAI LEA-29C16M 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 R-HS060D-3HF04 power supply is usually faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches (JCS7N65FB) and rectifier diodes of converters for 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) NCP1251 (PWM SOT23-6 5A ...), 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.
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.
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 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 JUG7.820.1221 motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card needs to be replaced in case of complex faults that are difficult to detect. When trying to repair, you should check its elements - EN25Q32B-104HIP, TPA3110D2 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner DWE-7053DW-PLL3 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.
Once again, remind users! Attempts to self-repair a TV AKAI LEA-29C16M without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Repair MainBoard
The appearance of the MainBoard JUG7.820.1221 is shown in the figure below:
JUG7.820.1221
JUG7.820.1221 can be used on TVs:
AKAI LEA29C16M (Panel ECG290MA-LZ1 (RP)), HYUNDAI H-LED29V15 (Panel ECG290MA-LZ1 (RP)).
The appearance of the power supply
Key Features of the AKAI LEA-29C16M:
Installed matrix (LED-panel) ECG290MA-LZ1 (RP).
The matrix control uses the Timing Controller (T-CON) V290BJ1-XC01 ;.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OB3350CP PWM controller. As the power elements of the LED driver, keys of the type TK40P03M, LP18N20 are used.
For all nodes of the TV, AKAI LEA-29C16M is powered by the R-HS060D-3HF04 power supply module or its analogs using NCP1251 microcircuits (PWM SOT23-6 5A ...) and power switches of the JCS7N65FB type.
MainBoard - the main board (motherboard) is a JUG7.820.1221 module, using chips EN25Q32B-104HIP, TPA3110D2 and others.
The tuner DWE-7053DW-PLL3 provides the reception of television programs and tuning to channels.
Information from an alternative source:
AKAI LEA29C16M
Panel Type (Matrix): ECG290MA-LZ1 (RP)
Motherboard: 868M JUG7.820.1221, EN25Q32B-104HIP, TPA3110D2, Tuner: DWE-7053DW-PLL3
T-con: V290BJ1-XC01, CM1801B, CM501, CM601, P2003EV6
PSU & Inverter: R-HS060D-3HF04, OB3350CP, JCS7N65FB, LP18N20, TK40P03M
Brand: AKAI, Model: LEA-29C16M.
Shortly from the TV: LCD, LED backlight, 29 ", 1366x768, 720p HD, sound: 12 W, HDMI connectors: 2.
The composition uses MainBoard JUG7.820.1221 and LCD-panel ECG290MA-LZ1 (RP).
Power Supply Unit (PSU) R-HS060D-3HF04 power Supply.
AKAI LEA-29C16M TV with ECG290MA-LZ1 LCD, 29 "(74 cm) diagonal, 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 2500 : 1. This model uses Edge LED lateral LED illumination. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic brabotka and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i Supported multimedia file formats:. MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the sound system 12 W (2x6 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, audio x3, component, VGA, HDMI x2, USB x2. 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.
The power consumed by the TV working in the network mode is 35 watts.
Overall dimensions: With stand 654x458x165 mm, Without stand 654x406x50 mm.
TV Weight: 5.7 kg.
Attention! The panel of the ECG290MA-LZ1 (RP) AKAI LEA-29C16M 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.