Technical description and composition of the SHARP LC-32P70E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32P70E
Panel: LK315P3LZ10Z
T-CON: PWB3333TPZV; T3Z16AFG-0001, BD8150KVT
Inverter (backlight): 32RUNTKA214WJZZ (8lamp)
PWM Inverter: H2022
Power Supply (PSU): DUNTKD605WE - QPWBSD605WJN5 - KD605WE14
PWM Power: MR4020, MR4030
MainBoard: QPWBFD604WJN3
IC MainBoard: MM1507XN, PIC16F913, BR24L64F, ISL83220, MM1507XN, MM1506XN, TDA8931T
Tuner: KU32D8EH - DUNTKD609WE - QPWBND609WJN3
Technical Specifications LC-32P70E
SHARP LC-32P70E
General recommendations for repairing TV LCD
Like any other TV, it is advisable to start repairing the SHARP LC-32P70E with an external examination of the visible changes in the external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
Malfunctions of the power module can be expressed in different ways, for example, the SHARP LC-32P70E does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
Sometimes the SHARP LC-32P70E TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit).
Diagnostics and repair of the inverter are 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 block a defect, it needs to be locked.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
It should be remembered! Attempts to repair the SHARP LC-32P70E 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!
LC-26P70EE, LC-26P70EF, LC-26P70EI, LC-26P70EK, LC-26P70ERU, LC-32P70EE, LC-32P70EF, LC-32P70EI, LC-32P70EK, LC-32P70ERU, LC-37P70EE, LC-37P70EF, LC-37P70EI, LC-37P70EK, LC-37P70ERU.
diagram Sharp LC-26P70EE, LC-26P70EF, LC-26P70EI, LC-26P70EK, LC-26P70ERU, LC-32P70EE, LC-32P70EF, LC-32P70EI, LC-32P70EK, LC-32P70ERU, LC-37P70EE, LC-37P70EF, LC-37P70EI, LC-37P70EK, LC-37P70ERU
The appearance of the MainBoard QPWBFD604WJN3 is shown in the figure below:QPWBFD604WJN3
QPWBFD604WJN3 can be used in TVs:
SHARP LC-32GA8RU (Panel LK315T3LF15), SHARP LC-32P70E (Panel LK315P3LZ10Z), SHARP LC-37GD9E (Panel LK370T3LZ5BX), SHARP LC-32SV1RU (Panel LK315T3LF14), SHARP LC-37RA1RU (Panel LK370T3LZ5BX).
The appearance of the power supply
Main features of the SHARP LC-32P70E device:
Installed matrix (LCD panel) LK315P3LZ10Z.
The matrix control uses the Timing Controller (T-CON) PWB3333TPZV ;.
To power the backlight, an inverter 32RUNTKA214WJZZ is used, it is controlled by the PWM controller H2022.
The necessary supply voltages for all nodes of the SHARP LC-32P70E TV are generated by the DUNTKD605WE power module or its analogs using MR4020 and MR4030 microcircuits.
MainBoard - the main board (motherboard) is a QPWBFD604WJN3 module, using microcircuits MM1507XN, PIC16F913, BR24L64F, ISL83220, MM1507XN, MM1506XN, TDA8931T and others.
Tuner KU32D8EH - DUNTKD609WE - QPWBND609WJN3 provides the reception of television programs and tuning to channels.
LCD TV SHARP LC-32P70E with LCD display LK315P3LZ10Z, 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 800: 1. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal generation takes place in the standards 480i, 480p, 576i, 576p.
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.
A digital tuner is capable of receiving television channels in DVB-T standards.
Overall dimensions: with stand 804x636x304 mm, without stand 804x575x119 mm.
TV Weight: with stand: 20 kg, without stand: 17.5 kg.
Attention! The LK315P3LZ10Z panel of an SHARP LC-32P70E 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!