Technical description and composition of the HAIER LE50U6500TF TV, type of panel and applicable modules. The composition of the modules.HAIER LED
Model: LE50U6500TF
Chassis / Version: T.MS6486.751
Panel: V500HJ1-PE8 rev.C7
T-CON: V500HJ1-PE8 rev.C7
LED driver (backlight): integrated into PSU
PWM LED driver: OCP8128
MOSFET LED driver: 60R360Q
Power Supply (PSU): TV5502-ZC02-01
PWM Power: TEA1716, SY8113B
MOSFET Power: 13NM60 (PFC), BYC8X-600P
MainBoard: T.MS6486.751
IC MainBoard: NAND: MX30LF4G18AC-TI, DRAM: NT5CB256M16DP-EK, WIFI-2-M603USA1
Tuner: DVB-T, DVB-T2, DVB-C
Control: Remote: HTR-A18EU
Technical Specifications LE50U6500TF
HAIER LE50U6500TF
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The HAIER LE50U6500TF 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.
With similar manifestations, in some cases, the TV5502-ZC02-01 power module is faulty. It is necessary to measure its output voltages, and in case of their absence, check the operability of power switches (13NM60 (PFC), BYC8X-600P) of converters and rectifier diodes for a short circuit probability.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers TEA1716, SY8113B, in the absence of visible damage or obvious short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
As a rule, in this case, the LED backlight turns out to be faulty. More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
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 TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the T.MS6486.751 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 it is necessary to check or replace (if necessary) the elements of the MainBoard board - WIFI-2-M603USA1, DRAM: NT5CB256M16DP-EK. 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 DVB-T, DVB-T2, DVB-C tuner. 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.
Attention TV owners! Attempts at self-repair HAIER LE50U6500TF are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / PSU ------------------> TV5502-ZC02-01 Power supply
The appearance of MainBoard T.MS6486.751 is shown in the figure below:T.MS6486.751
The appearance of the power supply
Key Features of HAIER LE50U6500TF:
Installed matrix (LED-panel) V500HJ1-PE8 rev.C7.
The matrix control uses the Timing Controller (T-CON) V500HJ1-PE8.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OCP8128 PWM controller. As power elements of the LED driver, keys of the 60R360Q type are used.
The necessary supply voltages for all nodes of the TV HAIER LE50U6500TF are generated by the TV5502-ZC02-01 power supply module or its analogs using TEA1716, SY8113B microchips and 13NM60 (PFC), BYC8X-600P type power switches.
MainBoard - the main board (motherboard) is a T.MS6486.751 module, using NAND chips: MX30LF4G18AC-TI, DRAM: NT5CB256M16DP-EK, WIFI-2-M603USA1 and others.
The tuner DVB-T, DVB-T2, DVB-C provides the reception of television programs and tuning to channels.
HAIER LE50U6500TF TV with V500HJ1-PE8 LCD, 50 "(127 cm) diagonal, 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 4000000: 1 is achieved by special control of the LEDs. V The LED panels of this TV are equipped with edge LED backlighting - Edge LED.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
The LE50U6500TF is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. Supported media file formats: MP3, MPEG4, MKV, JPEG.
The power of the sound system 20 W (2x10 W) provides two 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, component, VGA, HDMI x3, USB x3, Ethernet (RJ-45), Wi-Fi. 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 1124x710x238 mm, without stand 1124x649x54 mm.
TV Weight: with stand: 13.8 kg, without stand: 13.4 kg.
Attention! The panel V500HJ1-PE8 rev.C7 of the HAIER LE50U6500TF 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.