Technical description and composition of the SHARP LC-32SA1E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32SA1E
Panel: LK315T3LZ54
Lamp backlight: 14 Lamp CCFL
T-CON: X3509TP ZA
Inverter (backlight): RDENC2287TPZ A IM3832A U84PA-E0003486E
PWM Inverter: BD9777
MOSFET Inverter: RSS085, TPC8110
Power Supply (PSU): DUNTKD605WE QPWBSD605WJN5 KD605WE11
PWM Power: MRC613, MR4030, MR4020
MOSFET Power: TPC8110, RSS085, C5103
MainBoard: XD890WJN3 KD890 KD890WE13 & KD604WE13 QPWBFD604WJN4
IC MainBoard: VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64
Tuner: DUNTKD608E
Control: IR: QPWBFD607WJN1
Technical Specifications LC-32SA1E
SHARP LC-32SA1E
General recommendations for repairing TV LCD
Possible malfunctions
- The SHARP LC-32SA1E TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, a malfunction is most likely to be detected in the DUNTKD605WE power supply module. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches (TPC8110, RSS085, C5103) and rectifier diodes for possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually 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 MRC613, MR4030, MR4020 are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn on and immediately disappears.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. 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 enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
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). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltages at the terminals of the DUNTKD608E tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
TV users and owners need to remember that attempts to self-repair a SHARP LC-32SA1E TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual / schematic diagram --------------> SHARP LC-32SA1E, LC-32SA1RU 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-32SA1E device:
Installed matrix (LCD panel) LK315T3LZ54.
The matrix control uses the Timing Controller (T-CON) X3509TP.
The RDENC2287TPZ inverter is used to power the backlight, controlled by the BD9777 PWM controller. As power elements of the inverter, keys of the type RSS085, TPC8110 are used.
The necessary supply voltages for all nodes of the SHARP LC-32SA1E TV are generated by the DUNTKD605WE power module or its analogs using MRC613, MR4030, MR4020 microcircuits and power switches of the type TPC8110, RSS085, C5103.
MainBoard - the main board (motherboard) is an XD890WJN3 module, using VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64 and others.
The DUNTKD608E tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3LZ54
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit)
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 37 pins
Voltage: 5.0V
LCD TV SHARP LC-32SA1E with LCD LK315T3LZ54, 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.
The power consumed by the TV from the network in operating mode is 125 watts.
Overall dimensions: with stand 806x636x270 mm, without stand 806x577x137 mm.
TV Weight: with stand: 20.1 kg, without stand: 17.9 kg.
Attention! The SHARP LC-32SA1E LCD TV panel LK315T3LZ54 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
