Technical description and composition of the TV SHARP LC-32GA8RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32GA8RU
Panel: LK315T3LF15
T-CON: TW10794V-0
Inverter (backlight): RDENC2266TPZ IM3819
PWM Inverter: BD9777 (20), EZGW 224 MRC610 (14),
MOSFET Inverter: KC5103, TPC8110 (8), RSS085 (8)
Power Supply (PSU): DUNTKD605WE QPWBSD605WJN5
PWM Power: MRC613, MR4030, MR4020
MOSFET Power: TPC8110, RSS085, C5103
MainBoard: QPWBFD604WJN3 DUNTKD608WE
IC MainBoard: MM1507XN, PIC16F913, BR24L64F, ISL83220, MM1507XN, MM1506XN, TDA8931T
Tuner: QPWBFD608WJN2 DUNTKD608WE KU37A9EH
Control: IR: QPWBFD607WJN1
Technical Specifications LC-32GA8RU
SHARP LC-32GA8RU
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the SHARP LC-32GA8RU TV, both internal and external. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In cases where the SHARP LC-32GA8RU TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up and do not blink, and there are no sounds and no signs of operability at all, the DUNTKD605WE QPWBSD605WJN5 or , which is much less common - there is no processor power on the motherboard. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes or power switch TPC8110 RSS085, C5103.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM EZ2W 224 MRC613, BD9777 EZ6X224 chips from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SHARP LC-32GA8RU does not have an image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
If the DUNTKD608WE QPWBFD604WJN3 motherboard is faulty, first of all it is necessary to check all the linear power stabilizers of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Attention to users! Self-repair of a TV SHARP LC-32GA8RU without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------> Sharp LC-32GA8EE, LC-32GA8EF, LC-32GA8EI, LC-32GA8EK, LC-32GA8RU, LC-32BV8EE, LC-32BV8EF, LC-32BV8EI, LC-32BV8EK, LC-32BV8RU, LC-37GA8EE, LC-37GA8EF, LC-37GA8EI, LC-37GA8EK, LC-37GA8RU, LC-37BV8EE, LC-37BV8EF, LC-37BV8EI, LC-37BV8EK, LC-37BV8RU
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-32GA8RU device:
Installed matrix (LCD panel) LK315T3LF15.
The matrix control uses the Timing Controller (T-CON) TW10794V-0.
To power the backlight, an inverter RDENC2266TPZ is used, it is controlled by the BD9777 PWM controller (20), EZGW 224 MRC610 (14) ,. As power elements of the inverter, keys of the type KC5103, TPC8110 (8), RSS085 (8) are used.
The necessary supply voltages for all nodes of the SHARP LC-32GA8RU TV are generated by the DUNTKD605WE power module or its analogs using MRC613, MR4030, MR4020 microcircuits and power switches of the TPC8110, RSS085, C5103 type.
MainBoard - the main board (motherboard) is a QPWBFD604WJN3 module, using microcircuits MM1507XN, PIC16F913, BR24L64F, ISL83220, MM1507XN, MM1506XN, TDA8931T and others.
Tuner QPWBFD608WJN2 DUNTKD608WE KU37A9EH provides the reception of television programs and tuning to channels.
Information from an alternative source:
SHARP LC-32GA8RU
Panel Type (Matrix): LK315T3LF15
Motherboard: XD890WJN2, VCT69775 B3 000, SIL9021CTU, QF7159, EPM240, VAF9M30714, AV: QPWBFD604WJN3, TUNER: QPWBFD608WJN3, DUNTKD608WE
T-con: X3509TP, T3ZI6AFG-0001
Invertor: RDENC2266TPZ C,
PSU: QPWBSD605WJN5 KD605WE14