Technical description and composition of the TV SONY KDL-40R473A, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-40R473A
Chassis / Version: RB1FK BA
Panel: S400DH1-3 // S400DH1-2
LED backlight: SVG400A81_REV 3_121114
LED driver (backlight): integrated into PSU
PWM LED driver: BD9488F
MOSFET LED driver: KF5N50FZA
Power Supply (PSU): APS-349 (CH) GL4
PWM Power: MIP2H2 (Standby), CXA3810M (PFC & PWM resonant)
MOSFET Power: KF11N50F (PFC), KF5N50FZA
MainBoard: 1-895-375-51 - 1P-012CJ01-4010 Y200A520A - MOUNTED PWB A
IC MainBoard: MT5367ZUHU 1324-CCAL, K482G1646E
Tuner: SUT-RE227TN
Control: RM-ED054, IR: 1P-112B801-2010
Technical Specifications KDL-40R473A
SONY KDL-40R473A
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs SONY KDL-40R473A, as well as other electronic devices, it is recommended to start with an external examination of the external and internal 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. 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.
Sometimes the SONY KDL-40R473A TV just does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the APS-349 (CH) GL4 (CH) common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or broken resistors in its bundle.
If the SONY KDL-40R473A has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the S400DH1-3 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.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
If the motherboard 1-895-375-51 MOUNTED PWB A is faulty, first of all it is necessary to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
If it is not possible to replace the MB board (SSB), you need to check the health of its elements - MT5367ZUHU 1324-CCAL,. Defective components should be replaced.
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.
Schematic Diagram / Service manual --------------> Sony KDL-32R420A/421A/423A/424A, KDL-40R470A/471A/473A/474A/470A/473A Chassis RB1FK
psu / Service manual --------------> Sony ASP-348, ASP-349, ASP-350
The appearance of MainBoard 1-895-375-51 is shown in the figure below:1-895-375-51
1-895-375-51 can be used in TVs:
SONY KDL-40R473A (Panel S400DH1-3), SONY KDL-40R474A (Panel S400DH1-2), SONY KDL-46R473A (Panel S460DH1-1).
The appearance of the power supply
Main features of the device SONY KDL-40R473A:
Installed matrix (LED-panel) S400DH1-3 or S400DH1-2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a BD9488F PWM controller. As the power elements of the LED driver, keys of the type KF5N50FZA are used.
The necessary supply voltages for all nodes of the SONY KDL-40R473A TV are generated by the APS-349 power module or its analogs using MIP2H2 (Standby), CXA3810M (PFC & PWM resonant) microcircuits and power switches of the KF11N50F (PFC), KF5N50FZA type.
MainBoard - the main board (motherboard) is a module 1-895-375-51, using chips MT5367ZUHU 1324-CCAL, K482G1646E and others.
The SUT-RE227TN tuner provides television reception and channel tuning.
Information from an alternative source:
Sony KDL-40R473A
Panel Type (Matrix): S400DH1-3
Motherboard: 1P-012CJ01-4010
PSU: 1-888-121-11 (APS-349)
Remote control: RM-ED054