The composition of the modules.SHARP
Model: LC-52XL1RU
Panel: LK520D3LZ2CY
Inverter (backlight): RUNTKA259WJZZ (6lamp) QKITF0167S1P2 (75-12838Y), n.L. RUNTKA260WJZZ QKITF0167S2P2 (75-14196Y), v.p.
Power Supply (PSU): RDENCA229WJQZ
PWM Power: SPF9001, MC33262D (PFC), STR-W6765 (Standby)
MOSFET Power: 2SK3687
MainBoard: XE191WJTX - KE191 - KE191WE01
IC MainBoard: IXB755WJ, IXB680WJ, IXB946WJ, IXB046WJN1, IXB752WJ, M29DW128
Tuner: QA035WJ
Technical Specifications LC-52XL1RU
SHARP LC-52XL1RU
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of the SHARP LC-52XL1RU TV, like all others, with an external examination of possible changes, both external and internal elements. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
In the absence of any signs of operability, when the SHARP LC-52XL1RU does not turn on and does not signal anything with the control lights on the panel, the power module is most likely faulty. 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 power switch J655 pl K3706 pl.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of the device for their operation.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter feeding the inverter should be checked.
Repair of inverter vl RUNTKA259WJZZ (6l) QKITF0167S1P2 (75-12838Y), nl RUNTKA260WJZZ QKITF0167S2P2 (75-14196Y), vp RUNTKA261WJZZ QKITF0168S3P2 (6Y-0). RUNTKA262WJZZ QKITF0168S4P (74-05477Y) is complicated by the fact that in case of any malfunction or emergency, even if the lamps are unevenly worn, protection is triggered, which turns it off for fire safety purposes. Diagnosis becomes impossible and protection needs to be disabled.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Owners and users of the SHARP LC-52XL1RU 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!
Service Manual with Schematic Diagram 194 pages 2007 on models LC-46XL1E, LC-46XL1RU, LC-52XL1E, LC-52XL1RU.
Service Manual with Schematic Diagram ----- > Sharp LC-46XL1E, LC-46XL1RU, LC-52XL1E, LC-52XL1RU
The LC-52XL1RU model uses an RDENCA229WJQZ power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the MC33262D PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
Main features of the SHARP LC-52XL1RU device:
Installed matrix (LCD panel) LK520D3LZ2CY.
To power the backlight used inverter RUNTKA259WJZZ.
The necessary supply voltages for all nodes of the SHARP LC-52XL1RU television are generated by the RDENCA229WJQZ power supply module or its analogs using microcircuits SPF9001, MC33262D (PFC), STR-W6765 (Standby) and power switches of the 2SK3687 type.
MainBoard - the main board (motherboard) is an XE191WJTX module, using the IXB755WJ, IXB680WJ, IXB946WJ, IXB046WJN1, IXB752WJ, M29DW128 microcircuits, and others.
The QA035WJ tuner provides TV reception and channel tuning.
LCD TV SHARP LC-52XL1RU with LCD LK520D3LZ2CY, diagonal size 52 "(132 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 2000: 1. Dynamic contrast ratio of 10000: 1 is achieved by controlling the backlight, depending on the brightness of the plot.
The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Sound power 30 W (2x15 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 x2, 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
The power consumed by the TV from the network in operating mode is 305 watts.
Overall dimensions: with stand 1273x875x309 mm, without stand 1273x812x126 mm.
TV Weight: with stand: 41.8 kg, without stand: 37.2 kg.
Attention! The LK520D3LZ2CY panel of the SHARP LC-52XL1RU 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!