Technical description and composition of the SONY KD-75X9405C TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KD-75X9405C
Chassis / Version: BFM 1-980-837-11
Panel: YD5S750DTN01
LED backlight: Direct LED
T-CON: E88441 150413
LED driver (backlight): 15ST084A-A01 REV1.0
Power Supply (PSU): DPS-85 1-893-422-11
PWM Power: DDA010 (Stb + ST9S101-T6G), ICE2QS02G
MOSFET Power: STN1NK60Z
MainBoard: 1-980-837-11
Tuner: CE243ZP V6E21AA
Technical Specifications KD-75X9405C
SONY KD-75X9405C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KD-75X9405C does not turn on, the indicators on the front panel do not light up and do not blink. The TV does not respond to the control buttons and the remote control.
Often in such cases, the DPS-85 power module is faulty. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
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 (OOS) stabilization circuits. PWM controllers (PWM), 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, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
The faulty usually in these cases is the backlight matrix (LED-panel). More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be faulty.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 1-980-837-11 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 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 voltages at the terminals of the CE243ZP V6E21AA 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.
Owners and users of the SONY KD-75X9405C TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Schematic for PSU ---------------------> DPS-85QPA 380GLP30029DE0 TPM10.1HELA Power supply
The appearance of MainBoard 1-980-837-11 is shown in the figure below:1-980-837-11
Main features of the device SONY KD-75X9405C:
Installed matrix (LED-panel) YD5S750DTN01.
The matrix control uses the Timing Controller (T-CON) E88441.
The LED driver 15ST084A-A01 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the SONY KD-75X9405C TV are generated by the DPS-85 power supply module or its analogs using DDA010 microcircuits (Stb + ST9S101-T6G), ICE2QS02G and power switches of the STN1NK60Z type.
MainBoard - the main board (motherboard) is a module 1-980-837-11.
The CE243ZP V6E21AA tuner provides TV reception and channel tuning.
Brand: SONY, Model: KD-75X9405C.
Briefly from the TV: LCD, LED backlight, 75 ", 3840x2160, 4K UHD, 3D, there is PIP, DVR, sound: 90W, HDMI connectors: 4, Internet access, Wi-Fi, Bluetooth, Smart TV.
On the official site of Sony there is firmware (Firmware) - a software update to version 5.435 from 06.25.2019.
The composition uses MainBoard 1-980-837-11 and LCD-panel YD5S750DTN01.
Power Supply Unit (PSU) DPS-85 1-893-422-11 Power Supply.
SONY KD-75X9405C TV with YD5S750DTN01 LCD, 75 "(191 cm) diagonal size in 16: 9 format. LCD backlight uses Direct LED backlighting.
There is support for 3D images with active (shutter) technology for separating the right and left channels.
The YD5S750DTN01 display and software (software) of the 1-980-837-11 board provide viewing in high quality UHD 4K at a resolution of 3840x2160 pixels in the 4K UHD standard.
The KD-75X9405C is equipped with SMART software, embedded applications and the ability to work on the Internet. 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, Xvid, MKV, JPEG.
Power sound system 90 W (4x12.5 + 2x20 W) provide 6 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 x2, 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: 1920x1080, 3840x2160.
The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
The power consumed by the TV in the operating mode from the network is 486 watts.
Overall dimensions: with stand 1929x1041x322 mm, without stand 1929x991x110 mm.
TV Weight: with stand: 56.8 kg, without stand: 56 kg.
Attention! The YD5S750DTN01 panel of the SONY KD-75X9405C 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.
