Technical description and composition of the ERISSON 32LEC22T2 TV, type of panel and applicable modules. The composition of the modules.ERISSON LED
Model: 32LEC22T2
Chassis / Version: JUC7.820.00130484
Panel: C320X15-E6-H
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP4012
MOSFET LED driver: TO-252
Power Supply (PSU): integrated into MainBoard
PWM Power: NCP1251A
MOSFET Power: 70R600P
MainBoard: JUC7.820.00130484
IC MainBoard: SPI FLASH: GD25Q32
Tuner: CH DM121 C816RH
Specifications 32LEC22T2
ERISSON 32LEC22T2
General repair guidelines for TV LCD LED
Possible malfunctions
- ERISSON 32LEC22T2 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light up and do not blink, the TV does not respond to the control buttons.
First of all, in such cases, you should verify the operability of the common switching power supply (IIP) - AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard JUC7.820.00130484 main board. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches (70R600P) and rectifier diodes of the converters for possible short-circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 circuits NCP1251A are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason may be a break in the LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the thong connectors,
To check the LED strips, to open all the transitions of the LEDs, several tens of volts or more are needed, it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- 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 JUC7.820.00130484 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 - SPI FLASH: GD25Q32. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner CH DM121 C816RH. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Owners of 32LEC22T2 TVs are recommended to contact qualified specialists with the necessary work experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE FOR SPI FLASH -----------> ERISSON 32LEC22T2, Main: JUC7.820.00130484, Panel: C320X15-E6-H
The appearance of the MainBoard JUC7.820.00130484 is shown in the figure below:JUC7.820.00130484
Main features of the ERISSON 32LEC22T2 device:
Installed matrix (LED-panel) C320X15-E6-H.
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-5.
To power the backlight LEDs, a converter is used, combined with the main board JUC7.820.00130484, controlled by the MP4012 PWM controller. As power elements of the LED driver, keys of the TO-252 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using NCP1251A microcircuits and power switches of the 70R600P type.
MainBoard - the main board (motherboard) is a JUC7.820.00130484 module, using SPI FLASH chips: GD25Q32 and others.
The CH DM121 C816RH tuner provides TV reception and channel tuning.
Trademark: ERISSON, Model: 32LEC22T2.
Shortly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, DVR, sound: 12 W, HDMI connectors: 3.
The composition uses MainBoard JUC7.820.00130484 and LCD-panel C320X15-E6-H. The power supply is combined with the MainBoard.
ERISSON 32LEC22T2 TV with C320X15-E6-H LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 200 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1. LED TV backlighting is implemented in the manufacturing technology of the screen of this TV model. High quality HD images can be viewed at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
The power of the sound system 12 W (2x6 W) provides 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, component, VGA, HDMI x3, 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: 730x500x210 mm.
Mass of the TV: 6.4 kg.
Attention! The C320X15-E6-H panel of an ERISSON 32LEC22T2 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.
