Technical description and composition of the SHARP LC-37GA5E TV, type of panel and applicable modules. The composition of the modules.SHARP
Model: LC-37GA5E
Panel: LK370T3FZAO // CCHSMA 169WJ01
T-CON: DUNTKC919FE03 LCD CONTROLLER Unit
Inverter (backlight): RUNTKA099WJZZ INVERTER-A Unit // RUNTKA100WJZZ INVERTER-B Unit // RUNTKA101WJZZ INVERTER GND-A Unit // RUNTKA102WJZZ INVERTER GND-B Unit
Power Supply (PSU): PSD-0413 QPWBN0089SNEZ (40) RDENCA103WJZZ
MainBoard: DUNTKC656WJ QPWBXC656WJN5 -
Tuner: UR1316 / AIH-3
Control: RRMCGA323WJSA Remote Control Unit
Technical Specifications LC-37GA5E
SHARP LC-37GA5E
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the SHARP LC-37GA5E TV with a careful external examination of internal and external elements, including case parts, a display, buttons and loops. 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. 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.
Malfunctions of the PSD-0413 QPWBN0089SNEZ (40) RDENCA103WJZZ power supply module can be expressed in different ways, for example, the SHARP LC-37GA5E does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. 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.
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 can also cause a breakdown of the power switch of the converter.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Sometimes the SHARP LC-37GA5E TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including the power supply unit (power supply unit).
Diagnosis and repair of the inverter is 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 localize a defect, its blocking is required.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the inverter power elements. Upon completion of the diagnosis, all regular protection circuits should be restored.
Attention to the owners! Attempts at self-repair of the SHARP LC-37GA5E TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram -------------------> Sharp LC-37GA5EE, Sharp LC-37GA5EF, Sharp LC-37GA5EI, Sharp LC-37GA5EK, Sharp LC-37GA5ERU
Main features of the SHARP LC-37GA5E device:Installed matrix (LCD panel) LK370T3FZAO or CCHSMA 169WJ01.
The matrix control uses the Timing Controller (T-CON) DUNTKC919FE03.
RUNTKA099WJZZ inverter is used to power the backlight.
The formation of the necessary supply voltages for all nodes of the SHARP LC-37GA5E TV is carried out by the PSD-0413 power supply module, or its analogs.
MainBoard - the main board (motherboard) is a DUNTKC656WJ module.
The tuner UR1316 / AIH-3 provides the reception of television programs and tuning to channels.
LCD TV SHARP LC-37GA5E with LCD LK370T3FZAO, diagonal size 37 "(94 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 800: 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, component, SCART x2, RGB, VGA. 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.
Overall dimensions: with stand 917x707x307 mm, without stand 917x645x108 mm.
TV Weight: with stand: 22.5 kg, without stand: 18.5 kg.
Attention! The LK370T3FZAO panel of the SHARP LC-37GA5E 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!