Technical description and composition of the TV SHARP LC-32LE144RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-32LE144RU LC-32LE144E
Chassis / Version: 32LE244
Panel: V320BJ3-XC01 MA672-0-11 // V320BJ6-PE1 Rev: C1
LED backlight: RB069WJ1 UL345696 ASM-E R / L
T-CON: NT71168MFG, MAX17126
LED driver (backlight): V323-A07 4H + V3236.231-C1
PWM LED driver: BD9285F
MOSFET LED driver: PC015BD
Power Supply (PSU): DPS-140SP - 2A
PWM Power: DDA010 (Standby), S101 (6pin), SSC9502 (PWM resonant = DDA014)
MOSFET Power: K10A60DR, K6A60DR
MainBoard: 32LE244_MAIN BD REV: 1.02
IC MainBoard: TAS5707, 4435GM (8), RT8059GJ5 BQ = L1T (5), RT9043-GB 1X = D01 (5)
Tuner: TDTK-G641D (U)
Control: IR: 32LE244_IR BD Rev1.02
Technical Specifications LC-32LE144
SHARP LC-32LE144RU
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the SHARP LC-32LE144RU TV, as well as the external elements of the case. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Sometimes the SHARP LC-32LE144RU TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the DPS-140SP-2A common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The DDA010 PWM controller chip can also cause a breakdown of the power switch of the converter.
If there is no image when you turn on the SHARP LC-32LE144RU, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the circuit of the panel backlight LEDs, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
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).
When repairing an MB board, you must check its components TAS5707, 4435GM (8), RT8059GJ5 BQ = L1T (5), RT9043-GB 1X = D01 (5). Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the TDTK-G641D (U) tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention to the owners! Attempts at self-repair of the SHARP LC-32LE144RU TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram -----------> Sharp LC-32LE144E
psu / schematic diagram -----------> DPS-140SP
Service Manual with Schematic Diagram 40 pages 2012 model LC-32LE244E, LC-32LE144E.
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 LC-32LE144RU model uses a DPS-140SP power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the PWM controller SSC9502 = DDA014, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the SHARP LC-32LE144RU device:
Installed matrix (LED panel) V320BJ3-XC01 MA672-0-11 or V320BJ6-PE1 Rev: C1.
The matrix control uses the Timing Controller (T-CON) NT71168MFG.
The LED driver V323-A07 is used to power the backlight LEDs, it is controlled by the BD9285F PWM controller. As the power elements of the LED driver, keys of the type PC015BD are used.
The necessary supply voltages for all nodes of the SHARP LC-32LE144RU TV are generated by the DPS-140SP power module or its analogs using DDA010 (Standby), S101 (6pin), SSC9502 (PWM resonant = DDA014) microcircuits and K10A60DR, K6A60DR type power switches.
MainBoard - the main board (motherboard) is a 32LE244_MAIN module, using TAS5707, 4435GM (8), RT8059GJ5 BQ = L1T (5), RT9043-GB 1X = D01 (5) and others.
The TDTK-G641D (U) tuner provides TV reception and channel tuning.
