Technical description and composition of the TV SHARP LC-26S2RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-26S2RU
Panel: LK260T3LF12
T-CON: OEC7166A-038
Inverter (backlight): VIT79005.50 (7lamp)
PWM Inverter: OZ964SN (20pin), LM339A (14pin)
MOSFET Inverter: AO4614 (8)
Power Supply (PSU): CEF213A // DC-1107A
PWM Power: STR-W6765, STR-X6768N
MainBoard: CMF092A
IC MainBoard: OEC7166A, MST9883C-LF-110, SII9011CLU, R8J66607A72FP, AN15853B, MSP4410G, TA2024
Tuner: TAFV-W322D
Control: GA515WJSA
Technical Specifications LC-26S2RU
SHARP LC-26S2RU
General recommendations for repairing TV LCD
Repair of the SHARP LC-26S2RU TV is best started with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In the absence of any signs of operability, when the SHARP LC-26S2RU does not turn on and does not signal anything with the control lights on the panel, the DC-1107A power supply module is most likely faulty. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor BA6K1C.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the LM559 (14n) pl PWM controller circuit or broken resistors in its wiring.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
In cases where the SHARP LC-26S2RU TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Repair of the VIT79005.50 inverter (7l) can often be somewhat complicated by the use of special protection circuits that are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits to be able to make the necessary measurements at the control points of the circuit.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual, schematic diagram -------------------> Sharp LC-26S2RU
1. Service Manual with Schematic Diagram 75 pages 2006 on model LC-26S2RU
2. Service Manual with Schematic Diagram 2006 on the model LC-26S2, LC-26S2RU
The appearance of the MainBoard CMF092A is shown in the figure below:CMF092A
The appearance of the power supply
Main features of the SHARP LC-26S2RU device:
Installed matrix (LCD panel) LK260T3LF12.
The matrix control uses the Timing Controller (T-CON) OEC7166A-038.
To power the backlight, an inverter VIT79005.50 is used, it is controlled by the PWM controller OZ964SN (20pin), LM339A (14pin). As power elements of the inverter, keys of the type AO4614 (8) are used.
The necessary supply voltages for all nodes of the SHARP LC-26S2RU TV are generated by the power supply module CEF213A, or its analogs using microcircuits STR-W6765, STR-X6768N.
MainBoard - the main board (motherboard) is a module CMF092A, using microcircuits OEC7166A, MST9883C-LF-110, SII9011CLU, R8J66607A72FP, AN15853B, MSP4410G, TA2024 and others.
The TAFV-W322D tuner provides television reception and channel tuning.
LCD TV SHARP LC-26S2RU with LCD LK260T3LF12, diagonal size 26 "(66 cm) in 16: 9 format. The brightness of the screen is 500 cd / m² by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to minimum, not less than 600: 1.
You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound speaker system 20 W (2x10 W) provide 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, audio x2, component, SCART x2, RGB, VGA, HDMI. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
Overall dimensions: with stand 684x565x283 mm, without stand 684x506x116 mm.
TV Weight: with stand: 12.9 kg, without stand: 11.2 kg.
Attention! The LK260T3LF12 panel of an SHARP LC-26S2RU LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!