Technical description and composition of the TV SHARP LC-42XD1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-42XD1RU
Panel: LK370D3LZ1AB
T-CON: CPWBX3520TPZ
Inverter (backlight): MPV8A044 PCPV0047 (RUNTKA271WJZZ), MPV8A045 PCPV0048 (RUNTKA272WJZZ)
Power Supply (PSU): PSC10189D M (CA245WJQZ) 42XD1EA
PWM Power: FA5501AN, MR4040, MR4020
MOSFET Power: 2SK3525
MainBoard: KD628 (QPWBXD628WJN3) & KD604WE11 (QPWBFD604WJN4)
IC MainBoard: CPU: VGC5969B-A4, MSP4410K, Audio: TDA8931
Tuner: DUNTKD984WE (QPWBND984WJN1)
Technical Specifications LC-42XD1RU
SHARP LC-42XD1RU
General recommendations for repairing TV LCD
Possible malfunctions
- The SHARP LC-42XD1RU 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.
In such cases, the PSC10189D power supply is usually faulty. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (2SK3525) and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often 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 FA5501AN, MR4040, MR4020, in the absence of visible damage or frank fault between the terminals, are checked by replacing with new ones, 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.
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, 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the KD628 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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: VGC5969B-A4, MSP4410K, Audio: TDA8931 with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
A tuner malfunction DUNTKD984WE (QPWBND984WJN1) is installed 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.
Owners and users of the SHARP LC-42XD1RU television should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service manual / schematic diagram -------------------> SHARP LC-42XD1RU, LC-42XD1E
Service Manual with Schematic Diagram 98 pages 2006 on model LC-37XD1E, LC-37XD1RU, LC-42XD1E, LC-42XD1RU.
The appearance of the MainBoard KD628 is shown in the figure below:KD628
Main features of the SHARP LC-42XD1RU device:
Installed matrix (LCD panel) LK370D3LZ1AB.
The matrix control uses the Timing Controller (T-CON) CPWBX3520TPZ.
To power the backlight used inverter MPV8A044.
The necessary supply voltages for all nodes of the SHARP LC-42XD1RU TV are generated by the PSC10189D power module or its analogs using FA5501AN, MR4040, MR4020 microchips and 2SK3525 type power switches.
MainBoard - the main board (motherboard) is a KD628 module using CPU chips: VGC5969B-A4, MSP4410K, Audio: TDA8931 and others.
The tuner DUNTKD984WE (QPWBND984WJN1) provides the reception of television programs and tuning to channels.
LCD TV SHARP LC-42XD1RU with LCD LK370D3LZ1AB, 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 6000: 1 is achieved by controlling the backlight, depending on the brightness of the plot.
The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the speaker system of sound 30 W (2x15W) 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
Overall dimensions: with stand 1031x733x292 mm, without stand 1031x675x140 mm.
TV Weight: with stand: 33 kg, without stand: 29.5 kg.
Attention! The LK370D3LZ1AB panel of an SHARP LC-42XD1RU 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!