Technical description and composition of the TV SHARP 32RA1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: 32RA1RU
Chassis / Version: KD890
Panel: LK315T3LZ5AZ
T-CON: CPWBX3547TPZA 6Z-A061002U
Inverter (backlight): RDENC2299TPZZ (60) QKITF0169SNP2 6Y-48031Y
Power Supply (PSU): DUNTKD605FM01
PWM Power: MR4030, MR4020, NJM2904M-TE1
MainBoard: QPWBFD604WJN4 KD604, KD890
IC MainBoard: RH-IXB664WJZZY, RH-IXB698WJZZQ, 24L64F, TDA8931T, VCT6993, FRC9429A, SI19025CTV
Tuner: KD608FM TDA9886
Control: IR: QPWBFD607WJN1
Technical Specifications LC-32RA1RU
SHARP 32RA1RU
General recommendations for repairing TV LCD
Possible manifestations of defects
- SHARP 32RA1RU 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.
Typically, with such manifestations, the defect is caused by faulty elements in the main power module DUNTKD605FM01. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers MR4030, MR4020, NJM2904M-TE1, NJM2904M-TE1, in the absence of visible damage or frank short-circuit between the terminals, are 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.
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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the QPWBFD604WJN4 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 - RH-IXB664WJZZY, RH-IXB698WJZZQ, 24L64F, TDA8931T, VCT6993, FRC9429A, SI19025CTV. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before changing the tuner KD608FM TDA9886, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
TV users and owners must remember that attempts to self-repair a SHARP 32RA1RU TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
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
1. Service Manual with Schematic Diagram 186 pages 2007 models 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)
2. Service Manual with Schematic Diagram 186 pages 2007 on the model LC-32RA1E, LC-32RA1RU, LC-37RA1E, LC-37RA1RU.
The appearance of the MainBoard QPWBFD604WJN4 is shown in the figure below:QPWBFD604WJN4
QPWBFD604WJN4 can be used in TVs:
SHARP LC-26SV1RU (Panel LK260T3LF14 5v 24v), SHARP 32RA1RU (Panel LK315T3LZ5AZ), SHARP LC-37SD1RU (Panel LK370T3LZ5BX).
The appearance of the power supply
Main features of the SHARP 32RA1RU device:
Installed matrix (LCD panel) LK315T3LZ5AZ.
The matrix control uses the Timing Controller (T-CON) CPWBX3547TPZA.
To power the backlight used inverter RDENC2299TPZZ (60).
The necessary supply voltages for all nodes of the SHARP 32RA1RU television are generated by the DUNTKD605FM01 power module, or its analogs using MR4030, MR4020, NJM2904M-TE1 microcircuits.
MainBoard - the main board (motherboard) is a QPWBFD604WJN4 module, using RH-IXB664WJZZY, RH-IXB698WJZZQ, 24L64F, TDA8931T, VCT6993, FRC9429A, SI19025CTV, and others microcircuits.
The KD608FM TDA9886 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3LZ5AZ
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black
Active Area: 697.68x392.26 mm
LCD TV SHARP LC-32RA1RU with LCD, 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. 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 x3, S-Video, SCART x2, RGB, VGA, HDMI x2, 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 796x590x250 mm, without stand 796x532x115 mm.
TV Weight: with stand: 18.4 kg, without stand: 16.2 kg.
Attention! The LCD TV panel SHARP LC-32RA1RU is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!