Technical description and composition of the TV SONY KDL-46EX402, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-46EX402
Chassis / Version: AZ1-N
Panel: LTY460HM01
T-CON: FHD_MB4_C2LV1.4 LJ94-03116F
Inverter (backlight): SSB460-12S01
Power Supply (PSU): APS-260 1-881-519-11
PWM Power: MIP2H2, STR-H7204A, LX1692FIDW-TR
MainBoard: 1-881-019-32 BEN board
IC MainBoard: Cpu: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2
Tuner: SUT-AE102T
Control: BRA970002A, IR: 1-881-589-11
Technical Specifications KDL-46EX402
SONY KDL-46EX402
General recommendations for repairing TV LCD
Possible manifestations of defects
- SONY KDL-46EX402 does not turn on and does not show any signs of operability. Does not shine or blink indicators, does not respond to the remote control and control buttons.
In most of these cases, a fault is detected in the APS-260 power supply module. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit. The converter on the MIP2H2 PWM controller (standby) must be checked first.
It should be remembered that in cases of breakdown of semiconductor elements in the secondary circuits, the converter can operate in an emergency short circuit mode, and during a short circuit in the power elements of the primary circuit, a mains fuse or a current sensor at the source of the key 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.
PWM controllers (PWM) MIP2H2, STR-H7204A, LX1692FIDW-TR are checked by replacing with obviously working ones.
- 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.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the motherboard 1-881-019-32 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its components Cpu: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the SUT-AE102T tuner 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 a SONY KDL-46EX402 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
On the official site of Sony there is firmware (Firmware) - software update.
Firmware dated 11/07/2011.
The composition uses MainBoard 1-881-019-32 and LCD-panel LTY460HM01.
Power Supply Unit (PSU) APS-260 1-881-519-11 Power Supply.
Service Manual 3 files of 2010 FOR the model KDL-32EX401, KDL-37EX401, KDL-40EX401, KDL-46EX401, KDL-32EX402, KDL-37EX402, KDL-40EX402, KDL-46EX402.
Service manual and schematic diagram -----------------------> Sony KDL-32EX401, 32EX402, 37EX402, 40EX402, 46EX402 CHASSIS AZ1-N(3a-2)
The appearance of MainBoard 1-881-019-32 is shown in the figure below:1-881-019-32
1-881-019-32 can be used in TVs:
SONY KDL-32BX300 (Panel LTY320AP05), SONY KDL-32EX402 (Panel LTY320HM01 03), SONY KDL-40EX402 (Panel LTY400HM01), SONY KDL-40EX600 (Panel LTY400HF06), SONY KDL-46EX402 (Panel LTY460HM01).
The appearance of the power supply
Main features of the device SONY KDL-46EX402:
Installed matrix (LCD panel) LTY460HM01.
The matrix control uses the Timing Controller (T-CON) FHD_MB4_C2LV1.4.
To power the backlight used inverter SSB460-12S01.
The formation of the necessary supply voltages for all nodes of the SONY KDL-46EX402 TV is carried out by the APS-260 power module, or its analogs using MIP2H2, STR-H7204A, LX1692FIDW-TR microcircuits.
MainBoard - the main board (motherboard) is a module 1-881-019-32, using Cpu chips: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2 and others.
The SUT-AE102T tuner provides television reception and channel tuning.
