Technical description and composition of the TV SHARP LC-26SV1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-26SV1RU
Panel: LK260T3LF14 5v 24v
T-CON: X3509TP
Inverter (backlight): RDENC2267TPZ D
PWM Inverter: BD9777 (20)
MOSFET Inverter: TPC8110 (8), RSS ... (8)
Trans Inverter: NMB0007, NMB0005
Power Supply (PSU): QPWBSD605WJN5
PWM Power: MR4030, MR4020
MOSFET Power: TPC8110 (8n) chip RSS085 (8n) chip
MainBoard: QPWBFD604WJN4
IC MainBoard: RH-IXB664WJZZY, RH-IXB698WJZZQ, 24L64F, TDA8931T, VCT6993, FRC9429A, SI19025CTV
Tuner: DUNTKD608WE. SYS XD890WJN4
Control: GA531WJSA
Technical Specifications LC-26SV1RU
SHARP LC-26SV1RU
General recommendations for repairing TV LCD
It is advisable to start repairing the SHARP LC-26SV1RU TV with an external examination of all its constituent elements, both internal electronic components and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the SHARP LC-26SV1RU does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a fault in the QPWBSD605WJN5 power supply module. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or TPC8110 (8n) power key RSS085 (8n) chip.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip EZ09 224 MRC625 (14n) pl from the manufacturer.
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If the SHARP LC-26SV1RU has no image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Repair of the RDENC2267TPZ D inverter can often be somewhat complicated by the use of special protection circuits, which 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 in order to be able to make the necessary measurements at the control points of the circuit.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
If the TV works normally from external devices, but does not tune to television channels, the DUNTKD608WE tuner may be malfunctioning. SYS XD890WJN4. 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).
Owners and users of the SHARP LC-26SV1RU TV must 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 the MainBoard QPWBFD604WJN4 is shown in the figure below:QPWBFD604WJN4
QPWBFD604WJN4 can be used in TVs:
SHARP LC-26SV1RU (Panel LK260T3LF14 5v 24v), SHARP 32RA1RU (Panel LK315T3LZ5AZ), SHARP LC-37SD1RU (Panel LK370T3LZ5BX).
The appearance of the power supply
Main features of the SHARP LC-26SV1RU device:
Installed matrix (LCD panel) LK260T3LF14 5v 24v.
The matrix control uses the Timing Controller (T-CON) X3509TP.
The RDENC2267TPZ inverter is used to power the backlight lamps; it is controlled by the BD9777 PWM controller (20). The transformer NMB0007, NMB0005 is installed in the inverter converter. As power elements of the inverter, keys of the type TPC8110 (8), RSS ... (8) are used.
The necessary supply voltages for all nodes of the SHARP LC-26SV1RU TV are generated by the QPWBSD605WJN5 power supply module or its analogs using MR4030, MR4020 microchips and TPC8110 (8n) power switches, RSS085 (8n) chip, and
MainBoard - the main board (motherboard) is a QPWBFD604WJN4 module, using RH-IXB664WJZZY, RH-IXB698WJZZQ, 24L64F, TDA8931T, VCT6993, FRC9429A, SI19025CTV, and others microcircuits.
Tuner DUNTKD608WE. SYS XD890WJN4 provides TV reception and channel tuning.
Information from an alternative source:
SHARP LC-26SV1RU
Panel Type (Matrix): LK260T3LF14
Motherboard: QPWBFD604WJN4, QF7182-1-13, 24LC02B, TDA8931T x2, TUNER: QPWBFD608WJN3, Tuner: UV1316AI
T-con: X3509TP,
Invertor: RDENC2267TPZD,
PSU: QPWBSD605WJN5, MR4020 x2, LM2904, LM2903
Remote control: GA531WJSA
LCD TV SHARP LC-26SV1RU with LCD LK260T3LF14, diagonal size 26 "(66 cm) in 16: 9 format. The brightness of the screen is 450 cd / m² by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to minimum, not less than 1200: 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 x3, S-Video, SCART x2, RGB, VGA, HDMI, RS-232. An output for connecting headphones is provided. 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.
Overall dimensions: with stand 672x560x270 mm, without stand 672x501x137 mm.
TV Weight: with stand: 15.2 kg, without stand: 13 kg.
Attention! The LK260T3LF14 5v 24v panel of the SHARP LC-26SV1RU 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!