Technical description and composition of the TV SHARP LC-46LD265RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-46LD265RU
Chassis / Version: 715G6173
Panel: TPT460H1-HN04
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9902CGN
Power Supply (PSU): 715G6635-P01-000-003S
PWM Power: LD7591T, SSC9522S, A6069H
MOSFET Power: TK13A60D, TK10A50D
MainBoard: 715G6173-M01-000-004K
IC MainBoard: MT5561PUDT, TC58NVG0S3HTAI0, 24C64WP, MX25L12835F, TAS5721
Tuner: RE231TN
Technical Specifications LC-46LD265
SHARP LC-46LD265RU
General repair guidelines for TV LCD LED
Possible malfunctions
- The SHARP LC-46LD265RU TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
In most such cases, the main switching power supply 715G6635-P01-000-003S is found to be faulty. Then it is necessary to measure its secondary (output) voltages and, if they are absent, it is necessary to check the serviceability of power switches (TK13A60D, TK10A50D) and rectifier diodes of the converters for a possible short circuit.
During thermal and avalanche breakdowns of semiconductors in secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM microcircuit (PWM) LD7591T, SSC9522S, A6069H can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
As a rule, in such cases there is no display backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
- 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 715G6173-M01-000-004K motherboard should be started by checking the stabilizers and power converters needed to power the microcircuits and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MT5561PUDT, TC58NVG0S3HTAI0, 24C64WP, MX25L12835F, TAS5721 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The malfunction of the tuner RE231TN is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention to users! Self-repair of a TV SHARP LC-46LD265RU without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------------> SHARP LC-46LD265RU Chassis 715G6173
psu / schematic diagram --------------------> 715G6635-P01-000-0030 Power supply
The appearance of the MainBoard 715G6173-M01-000-004K is shown in the figure below:715G6173-M01-000-004K
715G6173-M01-000-004K can be used in TVs:
SHARP LC-46LD265RU (Panel TPT460H1-HN04), SHARP LC-42LD265RU (Panel TPT420H2-HVN06).
The appearance of the power supply
Main features of the SHARP LC-46LD265RU device:
Installed matrix (LED panel) TPT460H1-HN04.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9902CGN PWM controller.
The necessary supply voltages for all nodes of the SHARP LC-46LD265RU TV are generated by the power module 715G6635-P01-000-003S, or its analogs using microcircuits LD7591T, SSC9522S, A6069H and power switches of the type TK13A60D, TK10A50D.
MainBoard - the main board (motherboard) is a module 715G6173-M01-000-004K, using chips MT5561PUDT, TC58NVG0S3HTAI0, 24C64WP, MX25L12835F, TAS5721 and others.
The RE231TN tuner provides TV reception and channel tuning.