Technical description and composition of the TV SHARP LC-32GA3, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32GA3 LCD-32GA3
Panel: 32 inch RLCDTA028WJZZ
T-CON: XC807WJ
Inverter (backlight): RUNTKA069WJN2, RUNTKA070WJN2, RUNTKA071WJN2
PWM Inverter: BD9766FV
MOSFET Inverter: RSS050 P03 (8pin), RSS065 N03 (8pin)
Trans Inverter: Z1257 0506J, Z1256 0508J
Power Supply (PSU): MPF3609 - RDENCA068WJZZ
PWM Power: FA5502M
MainBoard: XC585WJ XC427WJ XC965WJ
IC MainBoard: CXA2069Q, MM1519XQ, SDA5550M, MSP3450G, AK4586VQ, TDA2024
Tuner: VTUATMQZ6-423
Technical Specifications LC-32GA3E
SHARP LC-32GA3
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of the SHARP LC-32GA3 TV, like all others, with an external examination of possible changes, both external and internal elements. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. 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.
If the power supply module malfunctions, external manifestations may be different, for example, the SHARP LC-32GA3 does not turn on at all and there is no indication of the indicator lights on the front panel. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
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 chip from the manufacturer.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
If the SHARP LC-32GA3 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.
In most cases, the diagnosis and repair of the RUNTKA069WJN2 inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Attention to the owners! Attempts at self-repair of the SHARP LC-32GA3 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram --------------> Sharp LC-32GA3E LC-32GA3E, LC-37GA3E
The appearance of the MainBoard XC585WJ is shown in the figure below:
XC585WJ
XC585WJ can be used in TVs:
SHARP LC-32GA3 LCD-32GA3 (Panel 32 дюйма RLCDTA028WJZZ), SHARP LC-26GA4E (Panel LK255T3FZA1).
Main features of the SHARP LC-32GA3 device:
Installed matrix (LCD-panel) 32 inches RLCDTA028WJZZ.
The matrix control uses the Timing Controller (T-CON) XC807WJ.
To power the backlight, an inverter RUNTKA069WJN2 is used, it is controlled by the BD9766FV PWM controller. The transformer Z1257 0506J, Z1256 0508J is installed in the inverter converter. As power elements of the inverter, keys of the type RSS050 P03 (8pin), RSS065 N03 (8pin) are used.
The necessary supply voltages for all nodes of the SHARP LC-32GA3 television are generated by the MPF3609 power module or its analogs using FA5502M microcircuits.
MainBoard - the main board (motherboard) is an XC585WJ module using CXA2069Q, MM1519XQ, SDA5550M, MSP3450G, AK4586VQ, TDA2024 and others.
Tuner VTUATMQZ6-423 provides the reception of television programs and tuning to channels.