Technical description and composition of the SHARP LC-50LE651 TV, panel type and applicable modules. The composition of the modules.SHARP LED
Model: LC-50LE651 LC-50LE651RU
Chassis / Version: DUNTKG135FM05
Panel: V500HK1-LE6 Rev. C4
T-CON: V420HK1-CS5 CHIMEI INNOLUX
LED driver (backlight): C500E06E02A CHIMEI INNOLUX
PWM LED driver: HAI7203HA
Power Supply (PSU): RDENCA459WJQZ
PWM Power: FAN7930CMX (PFC), SSC9522S, STR-A6069H, MP1583DP
MOSFET Power: AOTF5N50, AOTF7N60, AP72T02GH
MainBoard: DUNTKG135 QPWBXG135WJN2 DUNTKG135FM05
IC MainBoard: CPU: MT41J128M16JT; NAND Flash MT29F2G08ABAEA; SOUND: STA333BW
Technical Specifications LC-50LE651
SHARP LC-50LE651
General repair guidelines for TV LCD LED
Possible malfunctions
- The SHARP LC-50LE651 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, the RDENCA459WJQZ power supply module usually fails. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of power switches (AOTF5N50, AOTF7N60, AP72T02GH) of converters and rectifier diodes for a short circuit probability.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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) FAN7930CMX (PFC), SSC9522S, STR-A6069H, MP1583DP, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the DUNTKG135 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 - CPU: MT41J128M16JT; NAND Flash MT29F2G08ABAEA; SOUND: STA333BW 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.
Once again, remind users! Attempts to self-repair a TV SHARP LC-50LE651 without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
To reduce the backlight current in LED drivers with the HAI7203HA controller, the total resistance of the resistors from terminal 12 (ISET) to the housing should be increased. Currents will proportionally decrease in each of the 8 channels. With a parallel connection of channels, currents are summed.
Service Manual with Schematic Diagram 148 pages of 2013 for the ------> LC-39LE650E, LC-39LE650RU, LC-39LE650V, LC-39LE651E, LC-39LE651K, LC-39LE651RU, LC-39LE651V, LC-39LE652E, LC-39LE652RU, LC- 39LE652V, LC-50LE650E, LC-50LE650RU, LC-50LE650V, LC-50LE651E, LC-50LE651K, LC-50LE651RU, LC-50LE651V, LC-50LE652E, LC-50LE652RU, LC-50LE652V
The appearance of the MainBoard DUNTKG135 is shown in the figure below:DUNTKG135
DUNTKG135 can be used in TVs:
SHARP LC-39LE751RU (Panel V390HK1-LE6 Rev.C4), SHARP LC-60LE651RU (Panel R1JE600D3GV2AY).
The appearance of the power supply
Main features of the SHARP LC-50LE651 device:
Installed matrix (LED-panel) V500HK1-LE6 Rev. C4.
The matrix control uses the Timing Controller (T-CON) V420HK1-CS5.
The LED driver C500E06E02A is used to power the backlight LEDs, it is controlled by the HAI7203HA PWM controller.
The necessary supply voltages for all nodes of the SHARP LC-50LE651 television are generated by the RDENCA459WJQZ power supply module or its analogs using FAN7930CMX (PFC), SSC9522S, STR-A6069H, MP1583DP and power switches of the AOTF5N50, AOTF7N60, AP72T02GH type.
MainBoard - the main board (motherboard) is a DUNTKG135 module, using CPU chips: MT41J128M16JT; NAND Flash MT29F2G08ABAEA; SOUND: STA333BW and others.
Trademark: SHARP, Model: LC-50LE651.
Briefly from the TV: 3D LCD, 1080p Full HD, diagonal of 50 "(127 cm), Smart TV, HDMI connectors: 4, there is USB, there is support for DVB-T2, backlight type: Edge LED.
The composition includes MainBoard DUNTKG135 QPWBXG135WJN2 DUNTKG135FM05 and LCD-panel V500HK1-LE6 Rev. C4.
Power Supply Unit (PSU) RDENCA459WJQ