Technical description and composition of the SHARP LC-26P55E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-26P55E
Panel: 26 inch 960 x 540
Inverter (backlight): 5Y-1127Y // RUNTKA213WJZZ
Power Supply (PSU): DUNTKD605WE
PWM Power: MR4020, TA76431R, NJM2904M (LM358)
MainBoard: DUNTKD603FM01, DUNTKD604FM01
IC MainBoard: PIC16F913 (RH-IXB664WJZZY), BR24L64F (VHIBR24L64F-1Y), ISL83220 (VHIISL83220-1Y), VIDEO PROCESSOR: RH-IXB624WJZZQ
Tuner: FD608WJ
Technical Specifications LC-26P55E
SHARP LC-26P55E
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the SHARP LC-26P55E TV with a careful external examination of internal and external elements, including case parts, a display, buttons, and cables. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the SHARP LC-26P55E does not turn on and does not signal anything with the control lights on the panel, the DUNTKD605WE power supply module is most likely faulty. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
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 from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SHARP LC-26P55E does not have an 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.
Often, attempts to repair the 5Y-1127Y inverter are hampered by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Remember! Attempts to self-repair by users of the SHARP LC-26P55E TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
Service manual and schematic diagram -----------> Sharp LC-26P55EE, LC-26P55EF, LC-26P55EI, LC-26P55EK, LC-26P55ERU, LC-32P55EE, LC-32P55EF, LC-32P55EI, LC-32P55EK, LC-32P55ERU, LC-37P55EE, LC-37P55EF, LC-37P55EI, LC-37P55EK, LC-37P55ERU
Service Manual with Schematic Diagram 126 pages 2006 model LC-26P55EE, LC-26P55EF, LC-26P55EI, LC-26P55EK, LC-26P55ERU, LC-32P55EE, LC-32P55EF, LC-32P55EI, LC-32P55EK, LC- 32P55ERU, LC-37P55EE, LC-37P55EF, LC-37P55EI, LC-37P55EK, LC-37P55ERU.
The appearance of the power supplyMain features of the SHARP LC-26P55E device:
Installed matrix (LCD-panel) 26 inches 960 x 540.
To power the backlight used inverter 5Y-1127Y.
The necessary supply voltages for all nodes of the SHARP LC-26P55E TV are generated by the DUNTKD605WE power module or its analogs using MR4020, TA76431R, NJM2904M (LM358) microcircuits.
MainBoard - the main board (motherboard) is a DUNTKD603FM01 module, using PIC16F913 (RH-IXB664WJZZY), BR24L64F (VHIBR24L64F-1Y), ISL83220 (VHIISL83220-1Y), VIDEO PROCESSZJH and other chips.
The FD608WJ tuner provides television reception and channel tuning.
LCD TV SHARP LC-26P55E with LCD, diagonal size 26 "(66 cm) in 16: 9 format. The brightness of the screen is 450 cd / m² by fluorescent lights CCFL (EEFL). Contrast, as the ratio of maximum brightness to minimum , not less than 800: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p.
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, 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 670x554x253 mm, without stand 670x498x119 mm.
TV Weight: with stand: 15 kg, without stand: 13.5 kg.
Attention! The LCD TV panel SHARP LC-26P55E is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!