Technical description and composition of the SHARP LC-26LE430 TV, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-26LE430
Panel: T260XW06 V.4
Power Supply (PSU): 715G4623-P1B-W20-003E (PLTVBG684AZ A1)
PWM Power: LD7750RGR (7),
MOSFET Power: P1070ATF (STP10NK7CFP)
MainBoard: 715G4504-M02-000-005X (CBPFB40BZ5)
IC MainBoard: TA3571L (49),
Tuner: ENV57U09D5F
Control: GJ220
Technical Specifications LC-26LE430
SHARP LC-26LE430
General repair guidelines for TV LCD LED
It is advisable to start the repair of the SHARP LC-26LE430 TV with a careful external examination of both internal and external elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
In the case when the LC-26LE430 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module 715G4623-P1B-W20-003E (PLTVBG684AZ A1) is probably faulty in this case. If it is serviceable under such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard.When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of the P1070ATF transistors (STP10NK7CFP) and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all the semiconductor elements of the strapping of the LD7750RGR (7) PWM controller microcircuit are subject to verification, which it is desirable to verify by replacement.
If the SHARP LC-26LE430 does not have an image, but there is sound, the T260XW06 V.4 panel backlight LEDs or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It is necessary to disassemble the panel and check the LEDs themselves, the soldering of their conclusions, as well as the reliability of the connections in the connectors and the soldering of the conclusions of the connectors.
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.
Repair or diagnostics of the 715G4504-M02-000-005X motherboard (CBPFB40BZ5) should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
Board repair and replacement of TA3571L microcircuits (49) are carried out in the presence of the necessary equipment and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before replacing the tuner ENV57U09D5F, if there is no tuning to the channels, first you need to check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
It should be remembered! Attempts to repair the TV SHARP LC-26LE430, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service Manual with Schematic Diagram 205 pages 2010 for the LC-19LE430E, LC-22LE430E, LC-26LE430, LC-32LE430E.
schematic / service manual --------------> LC-19LE430E, LC-22LE430E, LC-26LE430, LC-32LE430E
Main features of the SHARP LC-26LE430 device:Installed matrix (LED-panel) T260XW06 V.4.
The necessary supply voltages for all nodes of the SHARP LC-26LE430 television are generated by the 715G4623-P1B-W20-003E power module, or its analogs using LD7750RGR microcircuits (7), and P1070ATF type power switches (STP10NK7CFP).
MainBoard - the main board (motherboard) is a 715G4504-M02-000-005X module, using TA3571L chips (49), and others.
The ENV57U09D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T260XW06 V4
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V