Technical description and composition of the SONY KD-49X8307C TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KD-49X8307C
Chassis / Version: GN1T
Panel: SYV4941 // LC490EQL (SH) (A2)
LED driver (backlight): integrated into PSU
Power Supply (PSU): APS-386 1-894-795-11
PWM Power: CXA3810M
MainBoard: 1-894-595-12 (Y210B300C)
IC MainBoard: IMAGE: MT5830DEHJ-BHHAH, CXD4753GB, eMMC: KLMAG2GEND-B031, Audio:: TAS5760M
Tuner: CE541ZP
Technical Specifications KD-49X8307C
SONY KD-49X8307C
General repair guidelines for TV LCD LED
Possible malfunctions
- SONY KD-49X8307C 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.
Most often, with such manifestations, the main power module APS-386 is found to be faulty. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns of semiconductors in secondary circuits, the converter can usually operate abnormally in short circuit mode, and during short circuit in the power elements of the primary circuit, the main fuse often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWMs) of the CXA3810M, if they do not have visible damage to the chassis and open short-circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
Usually in such cases there is no backlight LED-panel (matrix). The reason can sometimes be in the power of the LEDs, but more often in their malfunction (breakdown or break), sometimes in the violation of the contact connections of the LED strips.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the 1-894-595-12 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - IMAGE: MT5830DEHJ-BHHAH, CXD4753GB, eMMC: KLMAG2GEND-B031, Audio:: TAS5760M which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the CE541ZP tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Once again, remind users! Attempts to self-repair a SONY KD-49X8307C TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Main features of the device SONY KD-49X8307C:Installed matrix (LED-panel) SYV4941 or LC490EQL (SH) (A2).
To power the backlight LEDs, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the SONY KD-49X8307C TV are generated by the APS-386 power module or its analogs using CXA3810M microcircuits.
MainBoard - the main board (motherboard) is a 1-894-595-12 module, using IMAGE microcircuits: MT5830DEHJ-BHHAH, CXD4753GB, eMMC: KLMAG2GEND-B031, Audio:: TAS5760M and others.
The CE541ZP tuner provides TV reception and channel tuning.
SONY KD-49X8307C TV with SYV4941 LCD display, 49 "(124 cm) diagonal size in 16: 9 format. This model uses side backlighting from Edge LEDs.
The SYV4941 display and software (software) of the 1-894-595-12 board provide for viewing in high quality UHD 4K at a resolution of 3840x2160 pixels in the 4K UHD standard.
The KD-49X8307C TV has built-in SMART Software and preinstalled Android TV Operating System. Connecting to the Internet can be done via Wi-Fi. The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and image formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Video processor supported media file formats: MP3, WMA, MPEG4, JPEG.
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, component, SCART, HDMI x4, MHL, USB x3, Ethernet (RJ-45), Bluetooth, Wi-Fi. An output for connecting headphones is provided. To connect an analog computer or laptop to this TV model, a VGA (D-Sub 15) connector is used, which supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080, 3840x2160.
The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
Overall dimensions: with stand 1093x679x201 mm, without stand 1093x643x60 mm.
TV Weight: with stand: 15.4 kg, without stand: 14.4 kg.
Attention! The SYV4941 panel of the SONY KD-49X8307C LED TV is its most expensive element.
Avoid hitting the glass and excessive pressure on the screen surface to avoid damage to the LED panel!
It is unsafe to get any liquid on the screen. Sometimes one drop of water is enough, if it flows down the glass onto the cables, the TV can become unrepairable.