Technical description and composition of the TV SHARP LC-32SV1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32SV1RU
Chassis / Version: KD890
Panel: LK315T3LF14
T-CON: X3509TPZA
Inverter (backlight): RDENC2266TPZ (US P.NO.6714111) IM3819DA
Power Supply (PSU): DUNTKD605
PWM Power: MR4030, MR4020, NJM2904M-TE1
MainBoard: XD890WJN3, QPWBFD604WJN3 (KD604WE13)
IC MainBoard: VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64
Tuner: DUNTKD608E QPWBFD608WJN3
Control: IR QPWBFD607WJN1
Technical Specifications LC-32SV1RU
SHARP LC-32SV1RU
General recommendations for repairing TV LCD
Possible malfunctions
- SHARP LC-32SV1RU does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With such manifestations, a malfunction is most likely to be detected in the DUNTKD605 power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits, the converter can usually work abnormally in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits MR4030, MR4020, NJM2904M-TE1 are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the XD890WJN3 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Malfunction of the tuner DUNTKD608E QPWBFD608WJN3 is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to independently repair the SHARP LC-32SV1RU 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-32RA1E, Sharp LC-32RA1RU, LC-37RA1E, LC-37RA1RU, LC-32RD1E, LC-32RD1RU, LC-32SA1EA, LC-32SA1RUA, LC-32SD1EA, LC-32SD1RUA, LC-32ST1EA, LC-32ST1RUA, LC-32SV1EA, LC-32SV1RUA
LC-32RA1E, LC-32RA1RU, LC-32RD1E, LC-32RD1RU, LC-32SA1EA, LC-32SA1RUA, LC-32SD1EA, LC-32SD1RUA, LC-32ST1EA, LC-32ST1RUA, LC-32SV1EA, LC-32SV1RUA (LC-37RD1RU).
The appearance of the MainBoard XD890WJN3 is shown in the figure below:XD890WJN3
XD890WJN3 can be used in TVs:
SHARP LC-37P70E (Panel LK370P3LZ10Z), SHARP LC-37SV1RU (Panel LK370T3LZ5BX), SHARP LC-42SD1RU (Panel T420XW01 V.7), SHARP LC-32SV1RU (Panel LK315T3LF14).
The appearance of the power supply
Main features of the SHARP LC-32SV1RU device:
Installed matrix (LCD panel) LK315T3LF14.
The matrix control uses the Timing Controller (T-CON) X3509TPZA.
The RDENC2266TPZ inverter is used to power the backlight.
The necessary supply voltages for all nodes of the SHARP LC-32SV1RU television are generated by the DUNTKD605 power supply module or its analogs using MR4030, MR4020, NJM2904M-TE1 microcircuits.
MainBoard - the main board (motherboard) is an XD890WJN3 module, using VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64 and others.
Tuner DUNTKD608E QPWBFD608WJN3 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3LF14 2 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating (2H), Antireflection
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 37 pins
Voltage: 5.0V
LCD TV SHARP LC-32SV1RU with LCD LK315T3LF14, diagonal size 32 "(81 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.
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 x3, S-Video, 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 806x636x270 mm, without stand 806x577x137 mm.
TV Weight: with stand: 20.1 kg, without stand: 17.9 kg.
Attention! The LK315T3LF14 panel of an SHARP LC-32SV1RU 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!