SHARP LED
Model: LC-26LE320RU-BK 26LE320E
Panel: T260XW06 V.1 // T260XW06 V.0
LED driver (backlight): integrated into T-CON
Power Supply (PSU): 715G3965-P01-W20-003U ADTVA2432PA1
PWM Power: LD7576AGR (7), RT8289GSP (8)
MOSFET Power: K4101LS
MainBoard: 715G3876-M1A-000-005X
IC MainBoard: TPA3110D2, DC-DC MP2212 (8),
Tuner: TDTW-S810DM
Control: GJ220
Technical Specifications LC-26LE320
SHARP LC-26LE320RU-BK
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the SHARP LC-26LE320RU-BK TV, as well as the external elements of the case. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
In the absence of any signs of operability, when the SHARP LC-26LE320RU-BK does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the power module 715G3965-P01-W20-003U ADTVA2432PA1 of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. K4101LS options available.
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 semiconductor elements of the strapping of the PWM controller chip LD7576AGR (7), КЕ8289ПЫЗ (8), which it is desirable to check by replacement, are subject to verification.
If the SHARP LC-26LE320RU-BK does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the T260XW06 V.1 panel, or their power converter - LED drivers. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
If the motherboard 715G3876-M1A-000-005X is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Board repair and replacement of TPA3110D2, DC-DC MP2212 microcircuits (8) are carried out with 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.
If the TV works normally from external devices, but does not tune into television channels, the TDTW-S810DM tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention! For users and owners of LC-26LE320RU-BK TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual / schematic diagram ------------> Sharp LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
Service Manual with Schematic Diagram 336 pages 2010 model LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320.
The appearance of the MainBoard 715G3876-M1A-000-005X is shown in the figure below:715G3876-M1A-000-005X
Main features of the SHARP LC-26LE320RU-BK device:
The matrix (LED-panel) T260XW06 V.1 or T260XW06 V.0 is installed.
An integrated LED driver is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the SHARP LC-26LE320RU-BK TV are generated by the power module 715G3965-P01-W20-003U, or its analogs using microcircuits LD7576AGR (7), RT8289GSP (8) and power switches of the K4101LS type.
MainBoard - the main board (motherboard) is a 715G3876-M1A-000-005X module, using TPA3110D2 chips, DC-DC MP2212 (8), and others.
The TDTW-S810DM tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T260XW06 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 400 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