Technical description and composition of the TV SONY KDL-46EX710, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-46EX710
Chassis / Version: AZ1L_3a-0.3
Panel: T460HW04 V.5 181123211
T-CON: 185785111 55.46T04.C11
LED driver (backlight): integrated into PSU
Power Supply (PSU): 1-881-956-12 - A1754373B GE3 board
PWM Power: MIP2H2 (7), CXD9969AP
MainBoard: 1-881-636-23 BAL board A1763466A
IC MainBoard: TA55707, MB91F313A
Tuner: SUT-AE101T
Control: RM-ED035
Technical Specifications KDL-46EX710
SONY KDL-46EX710
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the SONY KDL-46EX710 TV, as well as the external elements of the housing. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the absence of any signs of operability, when the SONY KDL-46EX710 does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the power supply module GE3 A1754373B 1314931 SOEM 147421311 of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If, when you turn on the TV, the image appears and immediately disappears, or is missing initially when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (T460HW04 V.5 panel backlight power converter V.5 181123211). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
To check the health of the LEDs, as well as contact connections in the ruler circuit, the panel must be disassembled.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
Diagnosis and repair of the BAL A1763466A 1-881-636-23 motherboard is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
In cases where there is no tuning to the local television channels, you should make sure that the voltage of the varicaps (30-33V) and other supply voltages are at the terminals of the SUT-AE101T tuner.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual / SCHEMATICS -----------------> Sony KDL-32/40/46EX710, KDL-46EX711/713, KDL-55EX710/711/713 CHASSIS AZ1-L
The appearance of MainBoard 1-881-636-23 is shown in the figure below:1-881-636-23
The appearance of the power supply
Main features of the device SONY KDL-46EX710:
Installed matrix (LED panel) T460HW04 V.5 181123211.
The matrix control uses the Timing Controller (T-CON) 185785111.
To power the backlight LEDs, a converter is used, combined with a power supply.
The formation of the necessary supply voltages for all nodes of the SONY KDL-46EX710 TV is carried out by the power module 1-881-956-12, or its analogs using microchips MIP2H2 (7), CXD9969AP.
MainBoard - the main board (motherboard) is a module 1-881-636-23, using chips TA55707, MB91F313A and others.
The SUT-AE101T tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T460HW04 V5
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 5.5 (G to G)
Frequency: 60Hz
Lamp Type: 2 strings WLED Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V