Technical description and composition of the TV SHARP LC-32SA1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32SA1RU
Panel: LK315T3LF14 A31K1A32RJ
T-CON: X3509TP ZA
Inverter (backlight): RDENC2266TPZc IM3819CA
PWM Inverter: BD9777
Power Supply (PSU): QPWBSD605WJN5 DUNTKD605
PWM Power: MRC612 (SOP-14), MR4030, MR4020
MOSFET Power: C5103 (PL) TPC8110 (8N) PL RSS085 (8N) PL
MainBoard: KD890 DUNTKD890FM23
IC MainBoard: VCT69936 B3000, MP1410ES, EPM24, Si19021CTU, CM052B, PIC16F913, FRC9429AB2
Tuner: DUNTKD608WE
Technical Specifications LC-32SA1E
SHARP LC-32SA1RU
General recommendations for repairing TV LCD
Repair SHARP LC-32SA1RU must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including the case. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the QPWBSD605WJN5 power supply module fails, the external manifestations may be different, for example, the SHARP LC-32SA1RU does not turn on at all and there is no indication of the indicator lights on the front panel. In this case, first of all, it is necessary to check the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options are C5103 (pl) TPC8110 (8n) pl RSS085 (8n) pl.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller MRC612 (14n) pl BD9777 (20n) pl, which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the SHARP LC-32SA1RU 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.
Often, attempts to repair the inverter RDENC2266TPZc IM3819CA are complicated by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
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.
Repair or diagnostics of the DUNTKD608WE motherboard should be started by checking the power conditioners. If necessary, you should update the software (software).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual / schematic diagram --------------> Sharp LC-26SA1E, LC-26SA1RU, LC-32SA1E, LC-32SA1RU
The appearance of the MainBoard KD890 is shown in the figure below:Kd890
The appearance of the power supply
Main features of the SHARP LC-32SA1RU device:
Installed matrix (LCD panel) LK315T3LF14 A31K1A32RJ.
The matrix control uses the Timing Controller (T-CON) X3509TP.
The RDENC2266TPZc inverter is used to power the backlight, controlled by the BD9777 PWM controller.
The necessary supply voltages for all nodes of the SHARP LC-32SA1RU TV are generated by the QPWBSD605WJN5 power supply module or its analogs using MRC612 (SOP-14), MR4030, MR4020 microcircuits and power switches of the type C5103 (pl) TPC8110 (8n) pl RSS085 (8н) pl.
MainBoard - the main board (motherboard) is a KD890 module, using VCT69936 B3000, MP1410ES, EPM24, Si19021CTU, CM052B, PIC16F913, FRC9429AB2 and other chips.
The DUNTKD608WE tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SHARP
Model: LK315T3LF14 2 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: ASV, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating (2H), Antireflection
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 37 pins
Voltage: 5.0V