Technical description and composition of the SONY KDL-40WD653 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-40WD653
Panel: NS6S400DND01 4-580-636-11
LED backlight: 2015SONY TPZ40 FCOM A06 REV1.0 151014
LED driver (backlight): integrated into PSU
Power Supply (PSU): ACDP-060S03 Adapter 19.5V
MainBoard: 1-980-335-23 173587123. A2093494E
IC MainBoard: CPU: MT5566CQVT
Tuner: DE251ZP H7K020C
Control: Remote: RMT-TX102D, IR 1-980-483-21, Wi-Fi: J20H090.00 1-458-900-11
Technical Specifications KDL-40WD653
SONY KDL-40WD653
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-40WD653 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
With such manifestations, a malfunction is most likely to be detected in the ACDP-060S03 power supply module.
The owner of a TV can purchase an external power supply unit such as ACDP-060S03 and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- 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.
In such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-980-335-23 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 complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its CPU chips: MT5566CQVT and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the CE251ZP tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
We recommend the owners of the KDL-40WD653 TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
The appearance of MainBoard 1-980-335-23 is shown in the figure below:1-980-335-23
The appearance of the power supply
Main features of the device SONY KDL-40WD653:
Installed matrix (LED-panel) NS6S400DND01 4-580-636-11.
To power the backlight LEDs, a converter is used, combined with a power supply.
An external source of the ACDP-060S03 Adapter 19.5V type is used to power all internal components of the SONY KDL-40WD653 TV.
MainBoard - the main board (motherboard) is a module 1-980-335-23, using CPU chips: MT5566CQVT and others.
The tuner DE251ZP H7K020C provides the reception of television programs and tuning to channels.