Technical description and composition of the SONY KDL-46EX720 TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-46EX720
Chassis / Version: AZ2F
Panel: LTY460HJ05 3D // T460HW08 V.2
T-CON: EDL 4LV0.3 CXD4729GB 25Q80BV, 402WP, ISL24835, SM4109
LED driver (backlight): 1-883-300-11
PWM LED driver: BD9276EFV
Power Supply (PSU): APS-298 // APS-301
PWM Power: CXA3812M, CXA3811M, MIP2H2
MOSFET Power: FL4036
MainBoard: 1-883-753-32 BATV Y2009380A 178665 REV: 101
IC MainBoard: CXD47278B, RTL8201ES, MN1GD07G21
Technical Specifications KDL-46EX720
SONY KDL-46EX720
General repair guidelines for TV LCD LED
Repair of TVs, as well as other devices, it is advisable to start with an external examination. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
If the APS 298 power supply module fails, the external manifestations may be different, for example, the SONY KDL-46EX720 does not turn on at all and there is no indication of the control lights on the front panel. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
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 there is no image when you turn on the SONY KDL-46EX720, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LTY460HJ05 3D 1080p Full HD panel, or in their power converter.
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.
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 of the motherboard 1-883-753-32 BAT V 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.
We recommend the owners of the KDL-46EX720 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service Manual ---------------------------->160 pages 2011 FOR KDL-32EX720, KDL-32EX721, KDL-32EX723, KDL-32EX724, KDL-32EX725, KDL-32EX726, KDL-32EX727, KDL-32EX728, KDL-32EX729, KDL-37EX720 -37EX723, KDL-37EX725, KDL-40EX720, KDL-40EX721, KDL-40EX723, KDL-40EX724, KDL-40EX725, KDL-40EX726, KDL-40EX727, KDL-40EX728, KDL-40EX729, KDL-40EX729, KDL-40EX729, KDL-40EX729, KDL-40EX729, KDL-40EX729 , KDL-46EX723, KDL-46EX724, KDL-46EX725, KDL-46EX726, KDL-46EX727, KDL-46EX728, KDL-46EX729, KDL-55EX720, KDL-55EX721, KDL-55EX723, KDL-55EX.
The appearance of MainBoard 1-883-753-32 is shown in the figure below:1-883-753-32
1-883-753-32 can be used in TVs:
SONY KDL-32CX520 (Panel V315H3-L01), SONY KDL-32EX421 (Panel LTY320AN02), SONY KDL-32EX720 (Panel LTY320HJ01), SONY KDL-40EX521 (Panel LTY400HM08 001), SONY KDL-46EX720 (Panel LTY460HJ05 3D), SONY KDL-46CX520 (Panel LTY460HN01), SONY KDL-40CX521 (Panel LTY400HM07).
The appearance of the power supply
Main features of the device SONY KDL-46EX720:
Installed matrix (LED panel) LTY460HJ05 3D or T460HW08 V.2.
The matrix control uses the Timing Controller (T-CON) EDL.
The LED driver 1-883-300-11 is used to power the backlight LEDs, it is controlled by the BD9276EFV PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-46EX720 TV are generated by the APS-298 power module or its analogs using CXA3812M, CXA3811M, MIP2H2 microcircuits and power switches of the FL4036 type.
MainBoard - the main board (motherboard) is a 1-883-753-32 module, using CXD47278B, RTL8201ES, MN1GD07G21 and others.
TV SONY KDL-46EX720 with LCD display LTY460HJ05, diagonal size 46 "(117 cm) 16: 9 format. In the manufacturing technology of the display of this model is implemented LED backlight.
There is support for 3D images with active (shutter) technology for separating the right and left channels.
The LTY460HJ05 panel and the 1-883-753-32 motherboard software provide for viewing HD and Full HD images at a resolution of 1920x1080 pixels in a graphical decomposition according to the 1080p standard (Full HD).
The KDL-46EX720 is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and image formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Video processor supported media file formats: MP3, DivX, JPEG.
The power of the sound speaker system 20 W (2x10 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45). An output for connecting headphones is provided. To connect an analog computer or laptop to this TV model, a VGA (D-Sub 15) connector is used, which supports resolutions: 640x480, 800x600, 1024x768, 1360x768, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
The power consumed by the TV in the operating mode from the network is 133 watts.
Overall dimensions: with stand 1078x690x260 mm, without stand 1078x660x42 mm.
TV Weight: with stand: 17.9 kg, without stand: 14.3 kg.
Attention! The panel of the LTY460HJ05 3D LED TV SONY KDL-46EX720 is its most expensive element.
Avoid hitting the glass and excessive pressure on the screen surface to avoid damage to the LED panel!
It is unsafe to get any liquid on the screen. Sometimes one drop of water is enough, if it flows down the glass onto the cables, the TV can become unrepairable.