Technical description and composition of the SHARP LC-32D65E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32D65E LC-32D65RU
Chassis / Version: DUNTKE685WE
Panel: LK315D3LW1AY
Lamp backlight: 14 Lamp CCFL
T-CON: CPWBX RUNTK 4010TP
Inverter (backlight): integrated into PSU
PWM Inverter: BD9883FV
MOSFET Inverter: 2SK3706, 2SJ655
Trans Inverter: DHTP-3237 Z1353 08316
Power Supply (PSU): RUNTKA456WJQZ PSD-0576
PWM Power: FA5500A, TNY274PN
MOSFET Power: 2SK4087, 2SK4096LS
MainBoard: DUNTKE685WE
IC MainBoard: CPU: WX68 8568W_LF, STV8357F, IXC372WJ, S29G256P, MM1783CQ, STA333W
Tuner: TDAG4-B03A
Technical Specifications LC-32D65E
SHARP LC-32D65E
General recommendations for repairing TV LCD
Possible malfunctions
- SHARP LC-32D65E does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
In some of these cases, a fault is detected in the RUNTKA456WJQZ power supply module. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (2SK4087, 2SK4096LS) and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. Chips PWM (PWM) FA5500A, TNY274PN are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required when working, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the DUNTKE685WE motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: WX68 8568W_LF, STV8357F, IXC372WJ, S29G256P, MM1783CQ, STA333W with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Before replacing the TDAG4-B03A tuner, if there is no tuning to 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
It should be remembered! Attempts to independently repair the SHARP LC-32D65E 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 / schematic diagram --------------> SHARP LC-32D65E, LC-32D65RU, LC-37D65E, LC-37D65RU Chassis DUNTKE685WE LC-32D65E, LC-32D65RU, LC-37D65E, LC-37D65RU.
psu / schematic diagram --------------> RUNTKA456WJQZ Power supply
LC-32D65E, LC-32D65RU, LC-37D65E, LC-37D65RU.
The appearance of the MainBoard DUNTKE685WE is shown in the figure below:DUNTKE685WE
DUNTKE685WE can be used in TVs:
SHARP LC-32DH77RU LC-32DH77E (Panel LK315D3LW1AY), SHARP LC-52D65RU (Panel LK520D3LW1AY), SHARP LC-32D65E LC-32D65RU (Panel LK315D3LW1AY).
The appearance of the power supply
Main features of the SHARP LC-32D65E device:
Installed matrix (LCD panel) LK315D3LW1AY.
In matrix management, the CPWBX Timing Controller (T-CON) is used.
To power the backlight, a converter is used, combined with a power supply, controlled by the BD9883FV PWM controller. A transformer DHTP-3237 Z1353 08316 is installed in the inverter converter. As power elements of the inverter, keys of the type 2SK3706, 2SJ655 are used.
The necessary supply voltages for all nodes of the SHARP LC-32D65E TV are generated by the RUNTKA456WJQZ power supply module or its analogs using FA5500A, TNY274PN microchips and 2SK4087, 2SK4096LS power switches.
MainBoard - the main board (motherboard) is a DUNTKE685WE module using CPU chips: WX68 8568W_LF, STV8357F, IXC372WJ, S29G256P, MM1783CQ, STA333W and others.
The TDAG4-B03A tuner provides television reception and channel tuning.