Technical description and composition of the TV SHARP LC-37SV1RU, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-37SV1RU
Panel: LK370T3LZ5BX
T-CON: CPWBX3508TR2Q
Inverter (backlight): RUNTKA216WJZZ, RUNTKA217WJZZ
PWM Inverter: BD9777 (20) KIA324F (14)
MOSFET Inverter: RSS070 N05 (SO8), RSS070 P05 (SO8)
Power Supply (PSU): DUNTKD605WE KD605WE17
PWM Power: MR4020, TA76431R, TA76431R, NJM2904M (LM358)
MainBoard: XD890WJN3, DUNTKD604WE
IC MainBoard: VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64
Tuner: KD608WE
Technical Specifications LC-37SV1RU
SHARP LC-37SV1RU
General recommendations for repairing TV LCD
Any repair of electronic equipment begins with an external inspection of the device and diagnostics of the malfunction. In this case, you should visually carefully examine all the elements of the SHARP LC-37SV1RU TV, both internal and external. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the SHARP LC-37SV1RU does not turn on and does not signal anything with the control lights on the panel, the DUNTKD605WE KD605WE17 power supply module is most likely to be faulty. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the likelihood of an avalanche or thermal breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If there is no image when you turn on the SHARP LC-37SV1RU, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Repair of the inverter RUNTKA216WJZZ, RUNTKA217WJZZ can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual / schematic diagram -------------------> Sharp LC-37SA1E, LC-37SA1RU, LC-37SV1E, LC-37SV1RU
LC-37SA1E, LC-37SA1RU, LC-37SV1E, LC-37SV1RU.
The appearance of the MainBoard XD890WJN3 is shown in the figure below:XD890WJN3
XD890WJN3 can be used in TVs:
SHARP LC-37P70E (Panel LK370P3LZ10Z), SHARP LC-37SV1RU (Panel LK370T3LZ5BX), SHARP LC-42SD1RU (Panel T420XW01 V.7), SHARP LC-32SV1RU (Panel LK315T3LF14).
The appearance of the power supply
Main features of the SHARP LC-37SV1RU device:
Installed matrix (LCD panel) LK370T3LZ5BX.
The matrix control uses the Timing Controller (T-CON) CPWBX3508TR2Q.
To power the backlight, the RUNTKA216WJZZ inverter is used, it is controlled by the BD9777 (20) KIA324F (14) PWM controller. As power elements of the inverter, keys of the type RSS070 N05 (SO8), RSS070 P05 (SO8) are used.
The necessary supply voltages for all nodes of the SHARP LC-37SV1RU TV are generated by the DUNTKD605WE power module or its analogs using MR4020, TA76431R, TA76431R, NJM2904M (LM358) microcircuits.
MainBoard - the main board (motherboard) is an XD890WJN3 module, using VCT 6973G B3 000 (B3), LPM240T100G5N, DFN9M0637A (B823), SIL9023CTU, 24LC64 and others.
The KD608WE tuner provides TV reception and channel tuning.
LCD TV SHARP LC-37SV1RU with LCD LK370T3LZ5BX, diagonal size 37 "(94 cm) in 16: 9 format. The brightness of the screen is 450 cd / m² by backlighting with CCFL fluorescent lamps (EEFL). Contrast as the ratio of maximum brightness to minimum, not less than 1200: 1.
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 speaker system 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, SCART x2, RGB, VGA, HDMI, 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 power consumed by the TV from the network in operating mode is 158 watts.
Overall dimensions: with stand 926x703x304 mm, without stand 926x644x119 mm.
TV Weight: with stand: 22.6 kg, without stand: 19.9 kg.
Attention! The LK370T3LZ5BX panel of the SHARP LC-37SV1RU 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!