Technical description and composition of the HAIER LE40B8000TF TV, type of panel and applicable modules. The composition of the modules.Haier LED
Model: LE40B8000TF
Chassis / Version: MS308C0-ZC01-01
Panel: V400HJ6-PE1
LED backlight: LED40D12-02 (A) 30340012205
T-CON: V390HJ1-XRME1, V400HJ6-PE1
LED driver (backlight): integrated into PSU
PWM LED driver: OB3368AP
Power Supply (PSU): TV3902-ZC02-01 (D)
PWM Power: OB5269CP
MainBoard: MS308C0-ZC01-01
IC MainBoard: CPU: MSD6I681, SPI Flash: GD25Q64
Control: HTR-A18E
Technical Specifications LE40B8000TF
HAIER LE40B8000TF
General repair guidelines for TV LCD LED
Possible malfunctions
- Haier LE40B8000TF TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
Typically, with such manifestations, the defect is caused by faulty elements in the TV3902-ZC02-01 power supply module. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a 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.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key may be PWM (PWM) OB5269CP. It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
Usually in such cases, a malfunction is detected in the backlight nodes of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its 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 motherboard MS308C0-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). 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 CPU chips: MSD6I681, SPI Flash: GD25Q64 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Attention to users! Self-repair of a Haier LE40B8000TF TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH ---------------------> Haier LE40B8000TF, Main: MS308C0-ZC01-01, Panel: V400HJ6-PE1
To reduce the backlight current in LED drivers with the OB3368AP controller, it is necessary to proportionally increase the total resistance of the resistors from the 17 ISET pin to the housing. The current in milliamperes in each channel is determined from the calculation of 4000 * 1.2 / Rset, where Rset is the resistance from the output of 17 ISET to the housing in kilo-ohms.
Repair MainBoard
The appearance of the MainBoard MS308C0-ZC01-01 is shown in the figure below:
MS308C0-ZC01-01
The appearance of the power supply
Key Features of HAIER LE40B8000TF:
Installed matrix (LED-panel) V400HJ6-PE1.
The matrix control uses the Timing Controller (T-CON) V390HJ1-XRME1.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3368AP PWM controller.
The necessary supply voltages for all nodes of the TV HAIER LE40B8000TF are generated by the TV3902-ZC02-01 power module, or its analogs using OB5269CP microcircuits.
MainBoard - the main board (motherboard) is an MS308C0-ZC01-01 module, using CPU chips: MSD6I681, SPI Flash: GD25Q64 and others.
Additional technical information about the panel:
Brand: INNOLUX
Model: V400HJ6-PE1 Rev. C2
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: MVA, Normally Black, Transmissive
Active Area: 878.112x485.352 mm
Surface: Antiglare (Haze 1%)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
HAIER LE40B8000TF TV with V400HJ6-PE1 LCD, 40 "(102 cm) diagonal, 16: 9 format. The required screen brightness of 350 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.The TV’s design and technical capabilities include watching programs and movies in high quality HD with a resolution of 1920x1080 pixels in a graphic layout according to standard 108 0p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, JPEG. Stereo sound is realized by two built-in speakers. NICAM STEREO audio processing system 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 x3, USB x2, 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, 1280x1024, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With stand 904x554x211 mm, Without stand 904x525x69 mm.
Attention! The HAIER LE40B8000TF LED TV panel V400HJ6-PE1 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.
