Technical description and composition of the TV SHARP LC-32LE530RU, type of panel and applicable modules. The composition of the modules.SHARP LED
Model: LC-32LE530RU
Chassis / Version: 17MB61
Panel: LC320EUD (SD) (A2)
LED backlight: 2 * 40 Led (6V); 5 Chanal * 8 Led * 62 mA
T-CON: 6870-0358A VER1.0 V6 32/42/47 FND 12Dz P / N; TL2433MC, TPS65194, TPS65168, MAX9668E, 432RP
LED driver (backlight): 6917L-0045A PCLC-D002 A Rev0.7
PWM LED driver: SW5508, SM1202
Power Supply (PSU): 17PW07-2
PWM Power: FAN7529 (PFC), FAN7621, FSDL321 (Standby), NCP1579 (Step-Down)
MOSFET Power: FQPFN50C, A04842
MainBoard: 17MB61-3 v1
IC MainBoard: W9751G6J8-18, 25L8006E, 25L1606E, NT5TU64M16GG-AC X2, MP1484EN, MAX9736A
Tuner: DTOS403LH122E
Technical Specifications LC-32LE530
SHARP LC-32LE530RU
General repair guidelines for TV LCD LED
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the 17PW07-2 power module is faulty and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors FQPFN50C, A04842 in the primary circuit.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip FAN7529 (PFC), FAN7621, FSDL321 (Standby) , NCP1579 (Step-Down) or breakage of resistors in its harness.
If the SHARP LC-32LE530RU does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LC320EUD (SD) (A2) panel, or their power converter - LED driver. Sometimes, when turned on, the image appears and immediately disappears. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the backlight unit.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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 a group of P-N junctions connected in series, a voltage of several tens of volts may be required. Then you need to open the panel and try to check each LED separately with a multimeter. Dual LEds are used in this panel, and 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. If the backlight uses LEDs in which there is no zener diode, checking them is somewhat more complicated. It is necessary to limit the current from the power source to 50 mA.
Repair of the 17MB61-3 v1 motherboard must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - W9751G6J8-18, 25L8006E, 25L1606E, NT5TU64M16GG-AC X2, MP1484EN, MAX9736A with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the DTOS403LH122E tuner, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Attention! Users and owners of LC-32LE530RU TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual / schematic diagram -----------> Vestel 17MB61
psu / schematic diagram -----------> 17PW07-2
FIRMWARE SPI FLASH -----------> SHARP LC-32LE530RU, Main: 17MB61-3 v1, Panel: LC320EUD (SD)(A2)
Service Manual with Schematic Diagram 122 pages 2012 on model LC-32LE530E, LC-40LE530E
The appearance of the MainBoard 17MB61-3 is shown in the figure below:17MB61-3
PSU Advanced
The LC-32LE530RU model uses a 17PW07-2 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the FAN7529 PWM controller, 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-32LE530RU device:
Installed matrix (LED-panel) LC320EUD (SD) (A2).
The matrix control uses the Timing Controller (T-CON) 6870-0358A.
The LED driver 6917L-0045A is used to power the backlight LEDs, it is controlled by the PWM controller SW5508, SM1202.
The necessary supply voltages for all nodes of the SHARP LC-32LE530RU TV are generated by the 17PW07-2 power module or its analogs using FAN7529 (PFC), FAN7621, FSDL321 (Standby), NCP1579 (Step-Down) microcircuits and power switches of the type FQPFN50C, A04842 .
MainBoard - the main board (motherboard) is a 17MB61-3 module, using microcircuits W9751G6J8-18, 25L8006E, 25L1606E, NT5TU64M16GG-AC X2, MP1484EN, MAX9736A and others.
The DTOS403LH122E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EUD-SDA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M / 1.06B (8-bit / 8-bit + Dithering), CIE1931 72%
Response Time: 5 (G to G); 8 (MPRT)
Frequency: 120Hz + 120Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (4 ch, 8/10-bit), 92 pins
Voltage: 12.0V