Technical description and composition of the TV SONY KDL-32BX420, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-32BX420
Chassis / Version: AZ2-UK P-2F
Panel: T315HW04 V.C
T-CON: T315HW04 V0 CTRL BD
Inverter (backlight): 1931T08001 189504411
PWM Inverter: OZ964SN (20) AS339W-G1
MOSFET Inverter: P2904BO (3) P4004ED (3)
Trans Inverter: T51.8223.210
Power Supply (PSU): APS-283 (ID) 4-265-653-11 WS0015801 G13
PWM Power: MIP2H2, CXA3810
MainBoard: MT66-EU S0100-2 A
IC MainBoard: MT5135AE, STA3698WS, PS331
Tuner: SUT-RE205TN
Control: RM-ED046
Technical Specifications KDL-32BX420
SONY KDL-32BX420
General recommendations for repairing TV LCD
Repair of electronic equipment usually begins with an external inspection of the device and diagnosis of the malfunction. In this case, you should visually carefully examine all the elements of the SONY KDL-32BX420 TV, both internal and external. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for 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 hint in the assumptions about the causes and consequences of the malfunction.
Faults in the G13 APS-283 (ID) 4-265-653-11 WS0015801 power supply module can be expressed in different ways, for example, the SONY KDL-32BX420 does not turn on at all and the control lights on its front panel do not light up and do not blink, and there are no signs of operability. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of an open circuit, the reason should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a MIP2H2 PWM controller (7) in a single chip, are quite reliable and rarely fail for no reason. The reasons for the breakdown of the key should be sought 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.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If the SONY KDL-32BX420 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. 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 inverter itself, including in the secondary rectifier of the main PSU.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Diagnosis and repair of the motherboard PWB A 6572VZ1 5572V01 WS0016401 is carried out by checking the performance of power stabilizers or updating the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its MT5135AE STA3698WS PS331 chips and other possible faulty components.
If you suspect a malfunction of the EB1D06 SUT-RE205TN tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is on the corresponding output of the tuner, as well as other voltage supplying it.
Attention to the owners! Attempts at self-repair of the SONY KDL-32BX420 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram -------------------> Sony KDL-26BX320, KDL-26BX321, KDL-32BX320, KDL-32BX321, KDL-32BX420, KDL-37BX420, KDL-40BX420 Chassis AZ2EK P-2F
Service manual / schematic diagram -------------------> Sony KDL-32BX320, KDL-32BX321, KDL-32BX420, KDL-32BX421, KDL-40BX420, KDL-40BX421, KDL-46BX420, KDL-46BX421 Chassis AZ2-UK
PSU schematic diagram -------------------> Sony APS-283 Power supply
The appearance of the MainBoard MT66-EU is shown in the figure below:MT66-EU
MT66-EU can be used in TVs:
SONY KDL-32BX420 (Panel T315HW04 V.C), SONY KDL-26BX320 (Panel T260XW04 V.7).
The appearance of the power supply
Main features of the device SONY KDL-32BX420:
Installed matrix (LCD panel) T315HW04 V.C.
The matrix control uses the Timing Controller (T-CON) T315HW04.
To power the backlight, an inverter 1931T08001 is used, it is controlled by the PWM controller OZ964SN (20) AS339W-G1. A transformer T51.8223.210 is installed in the inverter converter. As power elements of the inverter, keys of the type P2904BO (3) P4004ED (3) are used.
The formation of the necessary supply voltages for all nodes of the SONY KDL-32BX420 TV is carried out by the APS-283 power module, or its analogs using MIP2H2, CXA3810 microcircuits.
MainBoard - the main board (motherboard) is an MT66-EU module, using chips MT5135AE, STA3698WS, PS331 and others.
The SUT-RE205TN tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW04 VC
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
