Technical description and composition of the TV SONY KDL-48WD653, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-48WD653
Chassis / Version: BBE Main
Panel: LSY480HN02-F03
LED backlight: LB48009 V0_03 & LB48009 V1_04
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): Adapter 19.5V
MainBoard: 1-980-335-32 (173587132)
IC MainBoard: CPU: MT5566CQVT
Tuner: DE251ZP H 8H05DA
Control: WIFI: J20H090
Technical Specifications KDL-48WD653
SONY KDL-48WD653
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The SONY KDL-48WD653 TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Most likely in this case, the main switching power supply (IPS) Adapter is faulty.
This TV model is equipped with an external power adapter type Adapter 19V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes there is a certain sense to open it and eliminate simple typical defects typical of IPS. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
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.
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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- 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
In some of these cases, the malfunction is caused by a lack of backlighting on the display. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard 1-980-335-32 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 board (SSB), it is necessary to check the health of its elements - CPU: MT5566CQVT 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).
Before replacing the tuner DE251ZP H 8H05DA, if there is no tuning for the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via I2C
Attention! For users and owners of KDL-48WD653 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-serviceability of the device.
The appearance of MainBoard 1-980-335-32 is shown in the figure below:1-980-335-32
Main features of the device SONY KDL-48WD653:
Installed matrix (LED panel) LSY480HN02-F03.
To power the backlight LEDs, a converter is used, combined with the main board 1-980-335-32.
To power all the internal components of the SONY KDL-48WD653 TV, an external adapter 19.5V type source is used.
MainBoard - the main board (motherboard) is a module 1-980-335-32, using CPU chips: MT5566CQVT and others.
The tuner DE251ZP H 8H05DA provides the reception of television programs and tuning to channels.
Brand: SONY, Model: KDL-48WD653.
Shortly from the TV: LCD, LED backlight, 48 ", 1920x1080, 1080p Full HD, DVR, sound: 10W, HDMI connectors: 2, Internet access, Wi-Fi, Smart TV.
Producer: Malaysia / Slovakia (Nitra) Developer: Sony Corporation. Japan
On the official site of Sony there is firmware (Firmware) - updating the software to version v8.219 from 07/03/2019.
The composition uses MainBoard 1-980-335-32 (173587132) and LCD-panel LSY480HN02-F03.
Power supply unit external Adapter 19V.
