Technical description and composition of the SONY KDL-50W656A TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-50W656A
Panel: T500HVF03.0
LED backlight: 58_LB_T50-JS-R / L-NICHIA4020-54-X1, 74.50T17.001-1-DX1 13625D
T-CON: T500HVN04.0 Ctrl BD (50T08-C07)
LED driver (backlight): ST500AU-6S01
Power Supply (PSU): ACDP-120E01 Adapter 19.5V 6.2A
MainBoard: 1-888-390-11 (173427811) A1949534A
IC MainBoard: CXD4748GB, CXD4743GB, NAND: TC58NVG3S0FTAI0
Tuner: 1-888-391-11 - A1949520A
Control: RM-ED053, WiFi: J20H069 MCLJ20H069
Technical Specifications KDL-50W656A
SONY KDL-50W656A
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KDL-50W656A does not turn on and does not show any signs of operability. Does not blink indicators and does not respond to any control buttons.
Failure in such cases should be sought in the power supply circuits ACDP-120E01.
This TV model is equipped with an external power supply unit such as ACDP-120E01 Adapter 19.5V 6.2A, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes some sense to open it and eliminate simple typical defects typical for IIP. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode 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 1-888-390-11 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). Board repair and replacement of CXD4748GB, CXD4743GB, NAND microcircuits: TC58NVG3S0FTAI0 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner 1-888-391-11 - A1949520A 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.
Attention to users! Self-repair of the SONY KDL-50W656A TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of MainBoard 1-888-390-11 is shown in the figure below:1-888-390-11
1-888-390-11 can be used in TVs:
SONY KDL-42W653A (Panel T420HVF04.2), SONY KDL-50W656A (Panel T500HVF03.0).
The appearance of the power supply
Main features of the device SONY KDL-50W656A:
Installed matrix (LED-panel) T500HVF03.0.
The matrix control uses the Timing Controller (T-CON) T500HVN04.0.
The LED driver ST500AU-6S01 is used to power the backlight LEDs.
To power all the internal components of the SONY KDL-50W656A TV, an external source such as ACDP-120E01 Adapter 19.5V 6.2A is used.
MainBoard - the main board (motherboard) is a 1-888-390-11 module, using CXD4748GB, CXD4743GB, NAND: TC58NVG3S0FTAI0 and others.
Tuner 1-888-391-11 - A1949520A provides the reception of television programs and tuning to channels.