Technical description and composition of the TV SHARP LC-42WD1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-42WD1RU
Panel: T420XW01 V.7
T-CON: T420XW01 V4 CTRL BD
Inverter (backlight): 4H.V1838.381 / C2, 4H.V1838.371 / C2
Power Supply (PSU): FSP332-5E01
MainBoard: PCB000223 G
IC MainBoard: TDA15134E / N1A04, PNX5010E / M1, TDA9975AEL / 1022, 24C32
Tuner: TD1318AF / IVP-3
Control: GA574WJSA, IRJ PCB000220D
Technical Specifications LC-42WD1RU
SHARP LC-42WD1RU
General recommendations for repairing TV LCD
TV SHARP LC-42WD1RU, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the LC-42WD1RU does not turn on, does not respond to the remote control and buttons on the front panel, does not blink light bulbs and does not show any signs of operability, most likely in this case the power module is faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of an open circuit, the reason should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If there is no image when you turn on the SHARP LC-42WD1RU, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general 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 localize a defect, its blocking is required.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Remember! Attempts to self-repair by users of the SHARP LC-42WD1RU TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
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Service manual / schematic diagram -------------------> SHARP LC-37WD1RU Chassis
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The appearance of MainBoard PCB000223 is shown in the figure below:PCB000223
PCB000223 can be used in TVs:
SHARP LC-32WD1RU (Panel LK315T3LZ5AZ), SHARP LC-37WD1RU (Panel LK370T3LZ6AZ), SHARP LC-42WD1RU (Panel T420XW01 V.7).
The appearance of the power supply
Main features of the SHARP LC-42WD1RU device:
Installed matrix (LCD panel) T420XW01 V.7.
The matrix control uses the Timing Controller (T-CON) T420XW01.
To power the backlight, an inverter 4H.V1838.381 is used.
The formation of the necessary supply voltages for all nodes of the SHARP LC-42WD1RU television is carried out by the power module FSP332-5E01, or its analogues.
MainBoard - the main board (motherboard) is a PCB000223 module, using TDA15134E / N1A04, PNX5010E / M1, TDA9975AEL / 1022, 24C32 and others.
The TD1318AF / IVP-3 tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T420XW01 V7
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 930.25x523.01 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit)
Response Time: 15/5 (Tr / Td); 6 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
LCD TV SHARP LC-42WD1RU with LCD T420XW01, diagonal size 42 "(106 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. Dynamic contrast ratio of 3000: 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 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 x4, S-Video, component, SCART x2, RGB, VGA, HDMI x2. 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 210 watts.
Overall dimensions: with stand 1027x730x293 mm, without stand 1027x673x111 mm.
TV Weight: with stand: 32 kg, without stand: 28.5 kg.
Attention! The T420XW01 V.7 panel of the SHARP LC-42WD1RU 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!
