Technical description and composition of the TV SONY KDL-49WE665, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-49WE665
Chassis / Version: BLM Board
Panel: HV490FHB-N8L
LED backlight: WW 1 GA 1 4-595-781- 80302GD
T-CON: 49 FHD G0A XPCB-L 47-600154
LED driver (backlight): 1-983-534-11 (173720711)
Power Supply (PSU): Adapter 19.5V
MainBoard: 1-981-541-13 (173641413)
Tuner: CE251ZP V8A27YA
Control: WIFI: DNUR-SY3 AK8DNURSY3
Technical Specifications KDL-49WE665
SONY KDL-49WE665
General repair guidelines for TV LCD LED
Possible malfunctions
- The SONY KDL-49WE665 TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
With such manifestations, in some cases, the Adapter power module is faulty.
This TV model is equipped with an external adapter 19.5V type power supply, 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 IIPS. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
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, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn 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.
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 lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-981-541-13 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software).
Before changing the CE251ZP V8A27YA tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that must be measured on the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
We recommend the owners of the KDL-49WE665 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!
Main features of the device SONY KDL-49WE665:The matrix (LED panel) HV490FHB-N8L is installed.
The matrix control uses the Timing Controller (T-CON) 49.
The LED driver 1-983-534-11 is used to power the backlight LEDs.
To power all the internal components of the SONY KDL-49WE665 TV, an external adapter type 19.5V is used.
MainBoard - the main board (motherboard) is a module 1-981-541-13.
The CE251ZP V8A27YA tuner provides TV reception and channel tuning.