Technical description and composition of the HAIER LE48M7000 TV, type of panel and applicable modules. The composition of the modules.HAIER LED
Model: LE48M7000 LE48M7000CF
Chassis / Version: T.SIS231.T701
Panel: LSC480HN05 HK480WLEDM-MH12H
LED backlight: 3BL-T5324102-001B 6049140001 JS-JY53EKAD-0007
T-CON: 13VNB_S60TMB4C4LV0.0
LED driver (backlight): integrated into PSU
Power Supply (PSU): 401-2E201-D4201 (HKL-390201)
MainBoard: T.SIS231.T701 & B.AML8726MX.2
IC MainBoard: SPI Flash: 25Q64B, Audio: NTP8212
Tuner: NoName
Control: IR: 39B7 IR PCB V3.0 6003050499
Technical specifications LE48M7000
HAIER LE48M7000
General repair guidelines for TV LCD LED
Possible malfunctions
- HAIER LE48M7000 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In some of these cases, the main switching power supply, module 401-2E201-D4201, is found to be faulty. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for a possible 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.
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, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
In some of these cases, the malfunction is caused by a lack of backlighting on the display. 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 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.SIS231.T701 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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SPI Flash: 25Q64B, Audio: NTP8212 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the NoName tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention to users! Self-repair of the HAIER LE48M7000 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH ----------------> HAIER LE48M7000CF, Main: T.SIS231.T701, Panel: LSC480HN05
The appearance of MainBoard T.SIS231.T701 is shown in the figure below:T.SIS231.T701
The appearance of the power supply
Key Features of HAIER LE48M7000:
Installed matrix (LED-panel) LSC480HN05 HK480WLEDM-MH12H.
The matrix control uses the Timing Controller (T-CON) 13VNB_S60TMB4C4LV0.0.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the HAIER LE48M7000 TV is carried out by the power module 401-2E201-D4201, or its analogues.
MainBoard - the main board (motherboard) is a T.SIS231.T701 module, using SPI Flash chips: 25Q64B, Audio: NTP8212 and others.
The NoName tuner provides television reception and channel tuning.
Brand: HAIER, Model: LE48M7000.
Briefly from the TV: LCD, LED backlight, 48 ", 1920x1080, 1080p Full HD, DVR, sound: 32W, HDMI: 4, Internet access, Wi-Fi, Smart TV.
The composition uses MainBoard T.SIS231.T701 & B.AML8726MX.2 and LCD-panel LSC480HN05 HK480WLEDM-MH12H.
Power Supply Unit (PSU) 401-2E201-D4201 Power Supply.
HAIER LE48M7000 TV with a LSC480HN05 LCD display, diagonal size 48 "(122 cm) in 16: 9 format. Dynamic contrast ratio of 4000000: 1 is achieved by special control of the LEDs. The LCD panel of the TV has direct illumination with rear LEDs - Direct 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 LE48M7000 TV has built-in SMART Software and a pre-installed Android TV Operating System. Connecting to the Internet can be done via Wi-Fi. The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 32 W (2x10 + 12 W) provide 3 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, SCART, VGA, HDMI x4, USB x3, Ethernet (RJ-45), Wi-Fi, WiDi. 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 standards.
Overall dimensions: With stand 1085x677x244 mm, Without stand 1085x633x72 mm.
Attention! The LSC480HN05 HK480WLEDM-MH12H panel of the HAIER LE48M7000 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.