Technical description and composition of the SONY KDL-32R424A TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-32R424A
Chassis / Version: RB1FK
Panel: S320DB3-1
LED driver (backlight): GL3B APS-348 B D
PWM LED driver: BD9488F
MOSFET LED driver: KF5N50FZA
Power Supply (PSU): APS-348 GL3B B D
PWM Power: BD7677FJ (PFC), MIP2H2 (Standby), CXA3810M (PWM resonant), LV5980MC
MOSFET Power: QM12N70F (PFC), KF5N50FZA
MainBoard: Y200A530A 1P-012CJ01-4010
IC MainBoard: MT5367ZUHU, FP6145B (8), FR8001 (8), AOZ1044PI (8), Z1043PI (8), 4612 (8), APL3546A (8)
Tuner: SUT-RE227TN
Control: RM-ED054.
Technical Specifications KDL-32R424A
SONY KDL-32R424A
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs SONY KDL-32R424A, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. 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.
Sometimes the SONY KDL-32R424A 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 GL3B APS-348 B D common power module. If it is working properly, you need to check the processor batteries on the SSB (Main Board). First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is cut off in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller MDS3652. D7677, LV5980, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If there is no image when you turn on the SONY KDL-32R424A, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the S320DB3-1 panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
Repair or diagnostics of the Y200A530A motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
Board repair and chip replacement MT5367ZUHU, FP6145B (8), FR8001 (8), AOZ1044PI (8), Z1043PI (8), 4612 (8), APL3546A (8) are made with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner SUT-RE227TN, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
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.
Service manual / schematic diagram -------------------> Sony KDL-32R420A/421A/423A/424A, KDL-40R470A/471A/473A/474A/470A/473A Chassis RB1FK.
PSU / schematic diagram -------------------> Sony ASP-348, ASP-349, ASP-350
The appearance of the MainBoard Y200A530A is shown in the figure below:Y200A530A
The appearance of the power supply
Main features of the device SONY KDL-32R424A:
Installed matrix (LED-panel) S320DB3-1.
The GL3B LED driver is used to power the backlight LEDs, it is controlled by the 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-32R424A TV are generated by the APS-348 power module or its analogs using BD7677FJ (PFC), MIP2H2 (Standby), CXA3810M (PWM resonant), LV5980MC and QM12N70F (PFC) power switches KF5N50FZA.
MainBoard - the main board (motherboard) is a Y200A530A module, using MT5367ZUHU, FP6145B (8), FR8001 (8), AOZ1044PI (8), Z1043PI (8), 4612 (8), APL3546A (8) and others.
The SUT-RE227TN tuner provides television reception and channel tuning.