Technical description and composition of the HAIER LE24B8000T TV, type of panel and applicable modules. The composition of the modules.HAIER LED
Model: LE24B8000T
Chassis / Version: MS308C1-ZC01-01
Panel: V236BJ1-P01
LED backlight: LED236D7-01 (B) 30323607206
LED driver (backlight): integrated into MainBoard
PWM LED driver: AP3064, OB3350
MOSFET LED driver: MDD1951
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: SMK0870F
MainBoard: MS308C1-ZC01-01
IC MainBoard: CPU: MSD308BEM, SPI Flash: GD25Q64, AUDIO: TPA1517
Tuner: TDA18275
Technical Specifications LE24B8000T
HAIER LE24B8000T
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The HAIER LE24B8000T does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and front-panel control buttons.
In such cases, the AC / DC voltage converter is often faulty, which is combined with the main board MS308C1-ZC01-01. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of the power switches (SMK0870F) and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PWM SOT23-6, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it responds to the remote. Or the image appears when you turn it on and immediately disappears
Usually in such cases there is no backlight LED-panel (matrix). Often the cause of the malfunction is the lack of current in the LED circuit, for example, an open or short circuit, or a violation of the contact connections of the connectors.
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 blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard MS308C1-ZC01-01 should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Board repair and replacement of CPU chips: MSD308BEM, SPI Flash: GD25Q64, AUDIO: TPA1517 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If you suspect that the TDA18275 tuner is malfunctioning, first of all, you need to verify the correctness of the software, as well as the presence of the required voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Once again, remind users! Attempts to repair the TV HAIER LE24B8000T on its own without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH ----------> HAIER LE24B8000T, Main: MS308C1-ZC01-01, Panel: V236BJ1-P01.
FIRMWARE FOR SPI FLASH ----------> HAIER LE24B8000T, Main: MS308C1-ZC01-01, Panel: HV236WHB-N00
The appearance of the MainBoard MS34631-ZC01-01 is shown in the figure below:MS34631-ZC01-01
Key Features of HAIER LE24B8000T:
Installed matrix (LED-panel) V236BJ1-P01.
To power the backlight LEDs, a converter is used, combined with the main board MS308C1-ZC01-01, it is controlled by the AP3064, OB3350 PWM controller. As the power elements of the LED driver, keys of the MDD1951 type are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits and power switches of the SMK0870F type.
MainBoard - the main board (motherboard) is an MS308C1-ZC01-01 module, using CPU chips: MSD308BEM, SPI Flash: GD25Q64, AUDIO: TPA1517 and others.
The TDA18275 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236BJ1-P01
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%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.5% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
HAIER LE24B8000T TV with V236BJ1-P01 LCD, 24 "(61 cm) diagonal size of 16: 9 format. The required screen brightness of 220 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 3000000: 1 is achieved by special control of the LEDs. V LED TV backlighting technology for this TV model is implemented, it is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed An analogue system in 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. Stereo sound is realized by two built-in 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, audio x2, component, SCART, VGA, HDMI x2, USB, Ethernet (RJ-45). 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-C, DVB-T2 standards.
Overall dimensions: With a support 567x386x160 mm, Without a support 567x343x40 mm.
TV mass: 38.5 kg.
Attention! The panel V236BJ1-P01 of the HAIER LE24B8000T 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.
