Technical description and composition of the TV SHARP LC-32DH57RU-BK, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-32DH57RU-BK
Chassis / Version: S59Z3
Panel: LK315T3GW40Y
T-CON: RUNTKA561WJ
Inverter (backlight): DUNKTF071WE
MOSFET Inverter: FDPF3860T, FQPF22P10
Trans Inverter: A343W
Power Supply (PSU): KF063WE
PWM Power: STR-Y6476 (7)
MOSFET Power: K3797
MainBoard: DUNTKF111 OPWBXF111WJZZ
Control: Remote: GA779WJSA, IR: HF115WJ H57CJ SH924L5
Technical Specifications LC-32DH57
SHARP LC-32DH57RU-BK
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the SHARP LC-32DH57RU-BK TV with a careful external examination of the internal and external elements, including case parts, display, buttons and loops. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the absence of any signs of operability, when the SHARP LC-32DH57RU-BK does not turn on and does not signal anything with the control lights on the panel, most likely the KF063WE power module is faulty. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch K3797 is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
The reasons for the breakdown of the power switch of the flyback converter of the power module 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 STRY6476 PWM controller microcircuit or broken resistors in its bundle.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it can sometimes become more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
In cases where the SHARP LC-32DH57RU-BK TV has lost an image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
When repairing the DUNKTF071WE inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Repair or diagnostics of the DUNTKF111 OPWBXF111WJZZ motherboard must be started by checking the power conditioners. If necessary, you should update the software (software).
Attention to users! Self-repair of a TV SHARP LC-32DH57RU-BK without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------> Sharp LC-32DH57E-BK, LC-32DH57RU-BK, LC-32DH57S-BK LC-32DH57E-BK, LC-32DH57RU-BK, LC-32DH57S-BK.
Main features of the SHARP LC-32DH57RU-BK device:Installed matrix (LCD panel) LK315T3GW40Y.
The matrix control uses the Timing Controller (T-CON) RUNTKA561WJ.
To power the backlight used inverter DUNKTF071WE. A transformer A343W is installed in the inverter converter. As power elements of the inverter, keys of the type FDPF3860T, FQPF22P10 are used.
The necessary supply voltages for all nodes of the SHARP LC-32DH57RU-BK TV are generated by the KF063WE power module or its analogs using STR-Y6476 microcircuits (7) and power switches of the K3797 type.
MainBoard - the main board (motherboard) is a DUNTKF111 module.LCD TV SHARP LC-32DH57 with LCD LK315T3GW40Y, diagonal size 32 "(81 cm) in 16: 9 format. The brightness of the screen is 450 cd / m² by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to minimum, not less than 1500: 1. Dynamic contrast ratio of 10000: 1 is achieved by controlling the backlight depending on the brightness of the plot.
You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 20 W (2x10 W) provides two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), SCART x2, RGB, VGA, HDMI x3, RS-232. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The digital tuner is capable of receiving television channels in DVB-T MPEG4 standards.
The power consumed by the TV from the network in operating mode is 90 watts.
Overall dimensions: with stand 791x575x235 mm, without stand 791x519x124 mm.
Mass of the TV: 11.5 kg.
Attention! The LK315T3GW40Y panel of the SHARP LC-32DH57 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!