Technical description and composition of the SONY KDL-46EX724 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-46EX724
Chassis / Version: AZ2F
Panel: LTY460HJ05 Full HD 3D
T-CON: EDL_4LV0.3 CXD4729GB, SM4109, ISL24835IRZ, 402WP, 25Q80BVSIG
LED driver (backlight): 1-883-300-11 (1-732-438-11)
PWM LED driver: BD9276EFV
MOSFET LED driver: R5005CNJ
Power Supply (PSU): APS-295 (APS-298) 1-884-406-1
PWM Power: CXA3812M, CXA3811M, MIP2H2
MOSFET Power: K5A50D, P9NK50ZFR, G20SC4M, N2206, FL4036
MainBoard: 1-883-753-13
IC MainBoard: CXD4727GB, K4B2G1646C-HCH9, KFM2GN6Q2B, Sil9287BCNU, CXD2829R, RTL8201ES, GL850G, Y164B, P95830
Control: RM-ED044
Appearance
SONY KDL-46EX724
General repair guidelines for TV LCD LED
Repair of the SONY KDL-46EX724 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. A visible physical change in some components can sometimes suggest a further troubleshooting direction. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In cases where the SONY KDL-46EX724 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the APS-295 power supply module is most likely to be faulty (APS-298) 1-884-406-1 or there is no standby power. When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter 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, P9NK50ZFR, G20SC4M, N2206 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-46EX724 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the LTY460HJ05 Full HD 3D panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
The lack of backlight often occurs due to an open circuit in the LED circuit. There is a need for disassembling the panel and checking the LEDs themselves, as well as the same contact connections in the connectors and rations of the terminals.
When diagnosing, it is necessary to take into account that it is impossible to check the open in the chain of LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally, a current source.
Repair of the motherboard 1-883-753-13 must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements CXD4727GB, K4B2G1646C-HCH9, KFM2GN6Q2B, Sil9287BCNU, CXD2829R, RTL8201ES, GL850G, Y164B, P95830 requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Attention! For users and owners of KDL-46EX724 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-repairability of the device.
Service manual ---------------------> Sony KDL-32EX720/721/723/724/725/726/727/728/729, KDL-37EX720/723/725, KDL-40EX720/721/723/724/725/726/727/728/729, KDL-46EX720/721/723/724/725/726/727/728/729, KDL-55EX720/721/723/725
The appearance of MainBoard 1-883-753-13 is shown in the figure below:1-883-753-13
The appearance of the power supply
Main features of the device SONY KDL-46EX724:
Installed matrix (LED-panel) LTY460HJ05 Full HD 3D.
The matrix control uses the Timing Controller (T-CON) EDL_4LV0.3.
The LED driver 1-883-300-11 is used to power the backlight LEDs, it is controlled by the BD9276EFV PWM controller. As the power elements of the LED driver, keys of the type R5005CNJ are used.
The necessary supply voltages for all nodes of the SONY KDL-46EX724 TV are generated by the APS-295 power module or its analogs using CXA3812M, CXA3811M, MIP2H2 microcircuits and power switches of the type K5A50D, P9NK50ZFR, G20SC4M, N2206, FL4036.
MainBoard - the main board (motherboard) is a module 1-883-753-13, using microcircuits CXD4727GB, K4B2G1646C-HCH9, KFM2GN6Q2B, Sil9287BCNU, CXD2829R, RTL8201ES, GL850G, Y164B, P95830 and others.
Information from an alternative source:
SONY KDL-46EX724 Chassis AZ2F
Panel Type (Matrix): LTY460HJ05,
Motherboard:1-883-753-13, CXD4727GB, K4B2G1646C-HCH9 x2, KFM2GN6Q2B, Sil9287BCNU, CXD2829R, RTL8201ES, GL850G, Y164B, P95830,
T-con: EDL_4LV0.3, CXD4729GB, SM4109, ISL24835IRZ, 402WP, 25Q80BVSIG, Led driver: 1-883-300-11 (1-732-438-11), BD9276EFV, R5005CNJ x4, WiFi: DWM-W046 1-458-355-11,
PSU: APS-298 (APS-295) 1-884-406-11, CXA3812M, CXA3811M, MIP2H2, FL4036 x2, K5A50D x2, P9NK50ZFR x2, G20SC4M x2, N2206 x2
Remote control: RM-ED044