Technical description and composition of the TV SHARP LC-32LE244RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-32LE244RU
Chassis / Version: 32LE244
Panel: V320HK2
LED backlight: UL345696, 01CVB059A003, RB069WJ1; 730 mm, 2 x 36 LED
T-CON: V320HJ2-CPE2; CM2801B, CM501, CM601
LED driver (backlight): V323-A07
Power Supply (PSU): DPS-140SP -2 2950307604
PWM Power: DDA010 (Standby), 1608B (PFC), S101 (6), DDA014 (18)
MOSFET Power: K10A60DR, K6A60DR
MainBoard: 32LE244_MAIN BD.Rev1.02
IC MainBoard: SPI Flach: 25Q64FVSIG, TAS5707, 4435GM (8pin), RT8059GJ5
Tuner: TDTK-G641D
Technical Specifications LC-32LE244
SHARP LC-32LE244RU
General repair guidelines for TV LCD LED
In the absence of any signs of operability, when the SHARP LC-32LE244RU does not turn on and does not signal anything with the control lamps on the panel, there is a possibility of a malfunction of the power supply module DPS-140SP -2 2950307604 of the TV. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) 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, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit DDA010 (Standby), 1608B (PFC), S101 (6), DDA014 (18), which it is desirable to check by replacement, are subject to verification.
If the SHARP LC-32LE244RU does not have an image, but there is sound, there may be a malfunction of the backlight LEDs of the V320HK2 panel or their power converter - LED driver.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a malfunction, the zener diode PN junction will either be cut off or broken into short-circuit.
On the motherboard 32LE244_MAIN BD.Rev1.02, in case of a malfunction, you should first check the operation of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing SPI Flach elements: 25Q64FVSIG, TAS5707, 4435GM (8pin), RT8059GJ5 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
The TDTK-G641D tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
It should be remembered! Attempts to repair the SHARP LC-32LE244RU 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!
Service Manual with Schematic Diagram 40 pages 2012 model ----------> LC-32LE244E, LC-32LE144E
psu / schematic diagram -----------> DPS-140SP
The appearance of the MainBoard 32LE244_MAIN is shown in the figure below:
32LE244_MAIN
32LE244_MAIN can be used on TVs:
SHARP LC-32LE144RU LC-32LE144E (Panel V320BJ3-XC01 MA672-0-11), SHARP LC-32LE244RU (Panel V320HK2).
PSU Advanced
The DPS-140SP power module is installed in the LC-32LE244RU TV using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the 1608B PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the SHARP LC-32LE244RU device:
Installed matrix (LED-panel) V320HK2.
The matrix control uses the Timing Controller (T-CON) V320HJ2-CPE2 ;.
The LED driver V323-A07 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the SHARP LC-32LE244RU TV are generated by the DPS-140SP power module or its analogs using DDA010 (Standby), 1608B (PFC), S101 (6), DDA014 (18) microcircuits and K10A60DR type power switches, K6A60DR.
MainBoard - the main board (motherboard) is a 32LE244_MAIN module using SPI Flach microcircuits: 25Q64FVSIG, TAS5707, 4435GM (8pin), RT8059GJ5 and others.
The TDTK-G641D tuner provides television reception and channel tuning.
