Technical description and composition of the SONY KDL-42EX410 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-42EX410
Chassis / Version: AZ2EK-P-1F
Panel: LC420EUN (SD) (V4)
T-CON: 6870C-0368D Ver V1.0 V11 TM120HZ TL2344ML, MAXIM 13179,
LED driver (backlight): 3PHGC20008A-R PCLF-D002V
MOSFET LED driver: 330A
Power Supply (PSU): APS-308 (CH) G16 1-884-864-11
PWM Power: MIP2H2 (7),
MOSFET Power: K5A50D, 12A50D
MainBoard: SOLED_32_MT66_EU_IP_MB
IC MainBoard: STA3698WS, RT8105 (8) DC-DC, D9329 (8) DC-DC,
Tuner: SUT-RE205TN
Control: RM-ED046
Technical Specifications KDL-42EX410
SONY KDL-42EX410
General repair guidelines for TV LCD LED
Repair of the SONY KDL-42EX410 TV is advisable to start with a careful external examination of both internal and external elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. 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-42EX410 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 G16 APS-308 (CH) power supply module of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors K5A50D, 12A50D in the primary circuit.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If the SONY KDL-42EX410 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LC420EUN (SD) (V4) panel, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
Repair or diagnostics of motherboard A should begin by checking the stabilizers or power converters of its microcircuit. If necessary, you should update the software (software).
When repairing an MB board, you need to check its components STA3698WS, RT8105 (8) DC-DC, D9329 (8) DC-DC ,. Defective items should be replaced. If BGA chips are installed, their malfunction is usually localized by heating. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If you suspect a malfunction of the SUT-RE205TN tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is present on the corresponding output of the tuner, as well as other voltage supplying it.
Owners and users of the SONY KDL-42EX410 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of MainBoard SOLED_32_MT66_EU_IP_MB is shown in the figure below:SOLED_32_MT66_EU_IP_MB
SOLED_32_MT66_EU_IP_MB can be used on TVs:
SONY KDL-42EX410 (Panel LC420EUN (SD)(V4)), SONY KDL-32EX310 (Panel LC320EXN (SD)(A3)).
The appearance of the power supply
Main features of the device SONY KDL-42EX410:
Installed matrix (LED-panel) LC420EUN (SD) (V4).
The matrix control uses the Timing Controller (T-CON) 6870C-0368D.
The LED driver 3PHGC20008A-R is used to power the backlight LEDs. As the power elements of the LED driver, keys of type 330A are used.
The necessary supply voltages for all nodes of the SONY KDL-42EX410 TV are generated by the APS-308 power module, or its analogs using MIP2H2 microcircuits (7), and power switches such as K5A50D, 12A50D.
MainBoard - the main board (motherboard) is a module SOLED_32_MT66_EU_IP_MB, using chips STA3698WS, RT8105 (8) DC-DC, D9329 (8) DC-DC, and others.
The SUT-RE205TN tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC420EUN-SDV4
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
