Technical description and composition of the HAIER LE40U5000TF TV, type of panel and applicable modules. The composition of the modules.HAIER LED
Model: LE40U5000TF
Chassis / Version: MS34637-ZC01-01
Panel: JE400D3HC2N
T-CON: 1P-0149J00-4011
LED driver (backlight): integrated into PSU
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: 70RJ8
MainBoard: MS34637-ZC01-01
Tuner: LHD
Control: IR: 303C4046231 TV4046-ZC25-01 (A)
Technical specifications LE40U5000TF
HAIER LE40U5000TF
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The HAIER LE40U5000TF does not turn on at all. There is no reaction to the remote control and front-panel control buttons. Indicator lights do not light or flash.
In this case, first of all, you should check the operability of the main power source - AC / DC network voltage converter, all of whose elements are located on the MainBoard MS34637-ZC01-01 board. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches (70RJ8) and the rectifier diodes of the converters for a short-circuit probability.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key 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. 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) PWM SOT23-6, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
The most likely in these cases is a malfunction of the LED 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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the motherboard MS34637-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).
Before changing the LHD tuner, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Owners and users of the HAIER LE40U5000TF TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of the MainBoard MS34637-ZC01-01 is shown in the figure below:MS34637-ZC01-01
Key Features of HAIER LE40U5000TF:
Installed matrix (LED-panel) JE400D3HC2N.
The matrix control uses the Timing Controller (T-CON) 1P-0149J00-4011.
To power the backlight LEDs, a converter is used, combined with a power supply.
The power module is combined with the MainBoard and is made according to the scheme of the flyback AC / DC voltage converter using PWM SOT23-6 microcircuits and power switches of the 70RJ8 type.
MainBoard - the main board (motherboard) is an MS34637-ZC01-01 module.
The LHD tuner provides television reception and channel tuning.
HAIER LE40U5000TF TV with JE400D3HC2N LCD, 40 "(102 cm) diagonal size 16: 9 format. The required brightness of the screen is 250 cd / m² LED backlighting. Dynamic contrast 4000000: 1 is achieved by special control of the LEDs. In manufacturing technology The LED TV backlight is implemented on the screen of this TV model. 0p (Full HD) Supported media file formats: MP3, MPEG4, JPEG.
The power of the sound system 16 W (2x8 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, audio x2, component, VGA, HDMI x2, USB, Ethernet (RJ-45). 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: with stand 920x680x212 mm,.
TV Weight: with stand: 9.3 kg, without stand: 6.6 kg.
Attention! The JE400D3HC2N panel of a HAIER LE40U5000TF 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.
