Thursday 12 March 2020

REPAIR / SERVICING TV SHARP LC-65CUG8052E

Technical description and composition of the TV SHARP LC-65CUG8052E, type of panel and applicable modules. The composition of the modules.
SHARP LED
Model: LC-65CUG8052E
Chassis / Version: T.MS6488E.U703
Panel: LSC650FN04
LED backlight: RF-AJ650E30-0601S-01 A4 109H04D1000770475
T-CON: 15Y_65_FU11BPCMTA4V0.4
LED driver (backlight): integrated into PSU
Power Supply (PSU): PW.198W2.711
MainBoard: T.MS6488E.U703
IC MainBoard: NAND: MX30LF4G18AC-TI
Tuner: CDT-9NT372RF-10
Control: IR: SPAD_402Rx + LED Light-V02
Technical Specifications LC-65CUG8052E
SHARP LC-65CUG8052E
General repair guidelines for TV LCD LED
Possible malfunctions
- The SHARP LC-65CUG8052E TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Most often, with such manifestations, the main power module PW.198W2.711 is found to be faulty. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In such cases, the most likely malfunction of the LED backlight elements. 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the T.MS6488E.U703 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 - NAND: MX30LF4G18AC-TI 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 replacing the tuner CDT-9NT372RF-10, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the SHARP LC-65CUG8052E 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 MainBoard T.MS6488E.U703 is shown in the figure below:
T.MS6488E.U703
The appearance of the power supply
Main features of the SHARP LC-65CUG8052E device:
Installed matrix (LED-panel) LSC650FN04.
The matrix control uses the Timing Controller (T-CON) 15Y_65_FU11BPCMTA4V0.4.
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 SHARP LC-65CUG8052E TV is carried out by the PW.198W2.711 power module, or its analogs.
MainBoard - the main board (motherboard) is a module T.MS6488E.U703, using NAND chips: MX30LF4G18AC-TI and others.
The tuner CDT-9NT372RF-10 provides the reception of television programs and tuning to channels.




LED TV SHARP LC-65CUG8052E with LCD LSC650FN04, diagonal size 64.5 "(164 cm) 16: 9 format. The brightness of the screen 350 cd / m² is provided by LED (LED) backlight. Dynamic contrast ratio of 1,000,000: 1 is achieved by controlling the LEDs (LED) depending on the brightness of the plot.In this model, the backlight with the end position of the LEDs (relative to the screen) is used - Edge LED.
You can watch movies in the highest possible quality UHD with a resolution of 3840x2160 pixels in the 4K UHD standard.
The LC-65CUG8052E TV is equipped with SMART software, as well as the ability to work with applications and on the Internet. Connecting to a network can be done via Wi-Fi.
Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), Xvid, MKV, JPEG.
The power of the sound system 20 W (2x10 W) provides 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, component, HDMI x3, MHL, USB x3, Ethernet (RJ-45), Wi-Fi 802.11ac, WiDi. An output for connecting headphones is provided.
The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
Overall dimensions: with stand 1462x901x280 mm, without stand 1462x852x87 mm.
Attention! The LSC650FN04 panel of the SHARP LC-65CUG8052E 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.