Technical description and composition of the TV SHARP LC-32G2M, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32G2M
Panel: 32 inch
T-CON: XC268WJ KC268
Inverter (backlight): RUNTKA069WJZZ QKITS0052SN2A (3Y), RUNTKA070WJZZ OKITS0052SN2B (3Y), RUNTKA072WJZZ OKITS0053SN4B (41), RUNTKA071WJZZ OKITS0053SN4
Power Supply (PSU): RDENCA059WJZZ (RDENCA081WJZZ)
MainBoard: XC269WJ
IC MainBoard: SIL861CM208 FF0462.1 0407 1.2, 48LC2M3282
Appearance
SHARP LC-32G2M
General recommendations for repairing TV LCD
It is advisable to start repairing a SHARP LC-32G2M TV, like any others, with an examination of the internal and external visible physical visual changes. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize 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 the case when the LC-32G2M does not turn on, does not respond to the remote control and front panel buttons, does not blink bulbs and does not show any signs of operability, most likely in this case the power supply module RDENCA059WJZZ (RDENCA081WJZZ) is faulty. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the SHARP LC-32G2M TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Repairing the inverter RUNTKA069WJZZ QKITS0052SN2A (3Y), RUNTKA070WJZZ OKITS0052SN2B (3Y), RUNTKA072WJZZ OKITS0053SN4B (41), it is often necessary to disconnect a few devices in case of safety reasons, it may be necessary to disconnect it from a number of safety lights, and there are several times when it is necessary to disconnect it; short circuits or open circuits in high voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). If it is not possible to replace the MB board (SSB), you need to check the health of its elements - SIL861CM208 FF0462.1 0407 1.2, 48LC2M3282. Defective components should be replaced.
Attention to users! Self-repair of a SHARP LC-32G2M TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------> Sharp LC-32G2M, LC-32G2X, LC-32G2H, LC-37G2M, LC-37G2X, LC-37G2H
Installed matrix (LCD-panel) 32 inches.The matrix control uses the Timing Controller (T-CON) XC268WJ.
RUNTKA069WJZZ inverter is used to power the backlight.
The formation of the necessary supply voltages for all nodes of the SHARP LC-32G2M TV is carried out by the RDENCA059WJZZ power supply module, or its analogs.
MainBoard - the main board (motherboard) is an XC269WJ module, using SIL861CM208 FF0462.1 0407 1.2, 48LC2M3282 and other chips.