Technical description and composition of the SONY KDL-32BX320 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-32BX320
Chassis / Version: AZ2EK_P-2F
Panel: T315XW03 V.E
T-CON: T315XW04 V1 31T10-T00
Inverter (backlight): T73I041.00 REV.0
PWM Inverter: OZ9966SN (24)
MOSFET Inverter: AO D4184 (3)
Trans Inverter: LT 136 A0843 005 1125V TT3-3
Power Supply (PSU): APS-283 G13 1-883-775-21
PWM Power: MIP2H2 (7), A3810M (24)
MOSFET Power: K5A50D
MainBoard: MT66_EU - S0100-2
IC MainBoard: MT5135AE, STA3698WS
Control: RM-ED046, IR: 55.72V02.F01G1A MT5366_IR
Technical Specifications KDL-32BX320
SONY KDL-32BX320
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of the SONY KDL-32BX320 TV, like all others, with an external examination of possible changes, both external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of 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-32BX320 TV simply 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-283 (ID) G13 common power module. If the mains fuse is broken in the power supply, in most cases a breakdown of the K5A50D power switch is detected, which can be integrated with a 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.
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip MIP2H2 (7), A3810M (24) may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuit.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
In cases where the SONY KDL-32BX320 TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) malfunction. When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
The diagnosis of the T73I041.00 REV.0 inverter can be difficult due to the protection being triggered, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
When disabling protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
In cases of attempts to repair the motherboard A, it is necessary to check the operability of the power supply stabilizers of the microcircuits and, if possible, update the software (software). In some cases, they require checking or replacing (if necessary) the elements of the MB board (SSB) - MT5135AE, STA3698WS,.
It should be remembered! Attempts to repair the SONY KDL-32BX320 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service manual / schematic diagram -------------------> Sony KDL-32BX320, KDL-32BX321, KDL-32BX420, KDL-32BX421, KDL-40BX420, KDL-40BX421, KDL-46BX420, KDL-46BX421 Chassis AZ2-UK
Service manual / schematic diagram -------------------> Sony KDL-26BX320, KDL-26BX321, KDL-32BX320, KDL-32BX321, KDL-32BX420, KDL-37BX420, KDL-40BX420 Chassis AZ2EK P-2F
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 on TVs:
SONY KDL-32BX320 (Panel T315XW03 V.E), SONY KDL-32BX420 (Panel T315HW04 V.C), SONY KDL-40BX420 (Panel LTZ400HM02 A04), SONY KDL-42EX410 (Panel LC420EUN (SD)(V4)), SONY KDL-32EX310 (Panel LC320EXN (SD)(A3)), SONY KDL-26BX320 (Panel T260XW04 V.7).
The appearance of the power supply
Main features of the device SONY KDL-32BX320:
Installed matrix (LCD panel) T315XW03 V.E.
The matrix control uses the Timing Controller (T-CON) T315XW04.
To power the backlight, an inverter T73I041.00 is used, it is controlled by the PWM controller OZ9966SN (24). A transformer LT 136 A0843 005 1125V TT3-3 is installed in the inverter converter. As power elements of the inverter, keys of the type AO D4184 (3) are used.
The necessary supply voltages for all nodes of the SONY KDL-32BX320 TV are generated by the APS-283 power module or its analogs using MIP2H2 (7), A3810M (24) microcircuits and K5A50D type power switches.
MainBoard - the main board (motherboard) is an MT66_EU module, using chips MT5135AE, STA3698WS and others.
Additional technical information about the panel:
Brand: AUO
Model: T315XW03 VE
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 3000: 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 (1 ch, 8-bit), 30 pins
Voltage: 12.0V
