Technical description and composition of the SHARP LC-46D65R TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-46D65R
Panel: LK460D3LW6AY
T-CON: XE707WJ BD8162EKV
Inverter (backlight): RUNTKA501WJZZ RUNTKA502WJZZ
PWM Inverter: HT40R46 (18). BD9896 (28) N5100V (8)
MOSFET Inverter: 30P10G1, 18NK20
Trans Inverter: 2874026700
Power Supply (PSU): RDENCA308WJQZ DPS-277BP-1
PWM Power: TNY264, DLA001, DAS001 (8), L6562 (PFC)
MOSFET Power: STTH8R06FP, K3569
MainBoard: DUNTKE688WE
IC MainBoard: XC2C128 BU1602KV STA333W STV8357FD
Technical Specifications LC-46D65E
SHARP LC-46D65R
General recommendations for repairing TV LCD
Like any other TV, SHARP LC-46D65R repair is advisable to start with an external inspection of the visible changes in the external and internal elements. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize 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.
In cases when the SHARP LC-46D65R TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power supply module RDENCA308WJQZ DPS is most likely to be faulty 277BP-1 or, which is much less common, there is no processor power on the motherboard. In this case, first of all, it is necessary to check the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Options are STTH8R06FP, K3569.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. 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 PWM controller chip TNY264, DL001, DAS001 (8), L6562 (8) can also cause a breakdown of the power switch of the converter.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the SHARP LC-46D65R has no image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
Diagnostics and repair of the inverter are often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to block a defect, it needs to be locked.
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.
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). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its XC2C128 BU1602KV STA333W STV8357FD chips and other possible faulty components.
Remember! Attempts to self-repair by users of the SHARP LC-46D65R TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service Manual with Schematic Diagram 102 pages on a model Sharp LC-46D65E, LC-46D65RU
According to the conditions of compliance with modern world standards for household switching power supplies, the RDENCA308WJQZ module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the L6562 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SHARP LC-46D65R device:
Installed matrix (LCD panel) LK460D3LW6AY.
The matrix control uses the Timing Controller (T-CON) XE707WJ.
To power the backlight, the RUNTKA501WJZZ inverter is used, it is controlled by the HT40R46 PWM controller (18). BD9896 (28) N5100V (8). A transformer 2874026700 is installed in the inverter converter. Keys like 30P10G1, 18NK20 are used as power elements of the inverter.
The necessary supply voltages for all nodes of the SHARP LC-46D65R TV are generated by the RDENCA308WJQZ power supply module or its analogs using TNY264, DLA001, DAS001 (8), L6562 (PFC) microchips and power switches of the STTH8R06FP, K3569 type.
MainBoard - the main board (motherboard) is a DUNTKE688WE module, using XC2C128 BU1602KV STA333W STV8357FD chips and others.
LCD TV SHARP LC-46D65E with LCD, diagonal size 46 "(117 cm) 16: 9 format. Brightness of the screen glow 450 cd / m² organized by backlighting with CCFL fluorescent lamps (EEFL). Dynamic contrast ratio 10000: 1 is achieved by operation control backlighting depending on the brightness of the plot.
The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
Supported media file formats: MP3, JPEG.
The power of the acoustic system of sound 20 W (2x10 W) provide 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), AV, audio x3, S-Video, component, SCART x2, RGB, VGA, HDMI x3, USB, 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
Overall dimensions: with stand 1113x756x295 mm, without stand 1113x704x96 mm.
TV mass: with stand: 29 kg, without stand: 24 kg.
Attention! The LCD TV panel SHARP LC-46D65E is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!