Technical description and composition of the SHARP LC-15B4E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-15B4E
Panel: 15 inch 921,600 dots VGA
Power Supply (PSU): adapter UADP-A034WJPZ 12V, 4.5a
PWM Power: D2011 (8)
MainBoard: DUNTKB750FE02 MAIN Unit + DUNTKB751DE02 TUNER Unit
IC MainBoard: UMX2N, NJU7662M (TE2), SDA5550M
Tuner: VTUVT4T5FD532
Technical Specifications LC-15B4EA
SHARP LC-15B4E
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the SHARP LC-15B4E TV with a careful external examination of internal and external elements, including case parts, a display, buttons and cables. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. 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 adapter UADP-A034WJPZ 12v, 4,5a power supply module fails, the external manifestations may be different, for example, the SHARP LC-15B4E does not turn on at all and there is no indication of the indicator lights on the front panel. It is advisable to start the troubleshooting of the power supply module by checking the line fuse. If it is torn, 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 a breakdown state 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 chip PWM 5511 D2011 (8) from the manufacturer.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
Sometimes the SHARP LC-15B4E TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including the power supply unit (power supply unit).
When repairing the inverter, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
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.
It should be remembered! Attempts to repair the SHARP LC-15B4E TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual / schematic diagram --------------------> SHARP LC-13B4E, LC-15B4E
Service Manual with Schematic Diagram 80 pages 2003 model LC-13B4E, LC-15B4E, LC-15B4EA
Main features of the SHARP LC-15B4E device:
Installed matrix (LCD panel) 15 inches 921,600 dots VGA.
To power all the internal nodes of the SHARP LC-15B4E TV, an external adapter type UADP-A034WJPZ 12v, 4.5a is used using D2011 microcircuits (8).
MainBoard - the main board (motherboard) is a DUNTKB750FE02 module, using microchips UMX2N, NJU7662M (TE2), SDA5550M and others.
Tuner VTUVT4T5FD532 provides the reception of television programs and tuning to channels.
LCD TV SHARP LC-15B4EA with an LCD display, diagonal size 15 "4: 3 format. The brightness of the screen 430 cd / m² organized by backlight fluorescent lamps CCFL (EEFL). Contrast, as the ratio of maximum brightness to minimum, at least 400 : 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 speaker system 4 W sound 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, S-Video, SCART, RGB, RS-232. An output for connecting headphones is provided.
Overall dimensions: with stand 484x382x198 mm, without stand 484x303x63 mm.
The mass of the TV: without stand: 5.3 kg.
Attention! The LCD TV panel SHARP LC-15B4EA is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!