Technical description and composition of the TV SHARP LC-19D1RU-WH, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-19D1RU-WH
Panel: LK185T3GW10
Inverter (backlight): integrated into PSU
Power Supply (PSU): RDENCA242WJQ1
MainBoard: DUNTKE243WE, DUNKE683WE
IC MainBoard: CPU: RH-IXB882WJZZ (BGA), EEPROM: 24CS64A
Technical Specifications LC-19D1
SHARP LC-19D1RU-WH
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnosis of the malfunction. In this case, you should visually carefully examine all the elements of the SHARP LC-19D1RU-WH TV, both internal and external. 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. Experienced repairmen are often aware of the causes of the defect and possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
Sometimes the SHARP LC-19D1RU-WH TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common power supply module RDENCA242WJQ1. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
Sometimes the SHARP LC-19D1RU-WH 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 in the power supply unit (power supply unit).
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to block a defect, it needs to be locked.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
The malfunction of the DUNTKE243WE tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
It should be remembered! Attempts to repair the TV SHARP LC-19D1RU-WH, 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-19D1E-BK, LC-19D1S-BK, LC-19D1E-WH, LC-19D1ES-WH, LC-19D1E-RD, LC-19D1S-RD, LC-19D1RU-BK, LC-19D1RU-WH, LC-19D1RU-RD
Main features of the SHARP LC-19D1RU-WH device:Installed matrix (LCD panel) LK185T3GW10.
To power the backlight, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SHARP LC-19D1RU-WH TV is carried out by the RDENCA242WJQ1 power module, or its analogs.
MainBoard - the main board (motherboard) is a DUNTKE243WE module, using CPU chips: RH-IXB882WJZZ (BGA), EEPROM: 24CS64A and others.
LCD TV SHARP LC-19D1 with LCD LK185T3GW10, diagonal size 19 "(48 cm) in 16: 9 format. The brightness of the screen is 300 cd / m² by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to minimum, not less than 1500: 1. Dynamic contrast of 7500: 1 is achieved by controlling the backlight depending on the brightness of the plot.
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 system 4 W (2x2 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x4, S-Video, component, SCART, 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, 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 42 watts.
Overall dimensions: with stand 462x360x196 mm, without stand 462x319x51 mm.
TV mass: with stand: 5.4 kg, without stand: 4.9 kg.
Attention! The SHARP LC-19D1 LCD TV panel LK185T3GW10 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
