Technical description and composition of the TV SONY KLV-22BX301, type of panel and applicable modules. The composition of the modules.SONY
Model: KLV-22BX301
Chassis / Version: AZ1A_5-2
Panel: 22 inch
Inverter (backlight): GD1 APS-259 / AU (CH)
PWM Inverter: OZ9972
MOSFET Inverter: SP8K4
Trans Inverter: T985 N9K2
Power Supply (PSU): GD1 APS-259 / AU
PWM Power: FA5571
MOSFET Power: 10N80
MainBoard: BAA board
IC MainBoard: MT5388GFMG, TPA3110D2, 95503 0E32
Tuner: TEQE8-L01A
Control: RM-GA019
Appearance
SONY KLV-22BX301
General recommendations for repairing TV LCD
Repair SONY KLV-22BX301 must begin with a diagnosis of the malfunction and a thorough inspection of its external and internal components, including those of the body. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the APS-259 / au GD1 power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. When diagnosing and repairing the APS-259 / au GD1 power supply, first of all, it is necessary to check the fuse, and if it breaks, check the power switch 10N80 and rectifier bridge diodes for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason, and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM FE5571 chip from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
Sometimes the SONY KLV-22BX301 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including the power supply unit (power supply unit).
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.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Diagnosis and repair of the BAA motherboard is carried out by checking the performance of power stabilizers or updating the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT5388GFMG, TPA3110D2, 95503 0E32 and replace failed chips with new ones.
If the TV works normally from external devices, but does not tune into television channels, the TEQE8-L01A tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Once again, remind users! Attempts to self-repair a TV SONY KLV-22BX301 without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------> Sony KLV-22BX300, KLV-26BX300, KLV-32BX300, KLV-40BX400 Chassis AZ1-A
The appearance of the MainBoard BAA is shown in the figure below:BAA
BAA can be used in TVs:
SONY KLV-22BX300 (Panel T216XW01 V.3), SONY KLV-22BX301 (Panel 22 "), SONY KLV-26BX301 (Panel V260B3-L05 Rev.C1), SONY KLV-26NX400 (Panel V260B3-L05 Rev.C1), SONY KLV-32BX300 (Panel LTY320AP04), SONY KLV-32BX301 (Panel LTY320AP05 006), SONY KLV-32NX500 (Panel T315HW04 V.0), SONY KLV-40BX400 (Panel LTZ400HM01 A13), SONY KLV-40BX401 (Panel LTY400HM01 A05 ), SONY KLV-32EX300 (Panel LTY320AP04), SONY KLV-40NX500 (Panel T400HW03 v.0).
The appearance of the power supply
Main features of the device SONY KLV-22BX301:
Installed matrix (LCD-panel) 22 inches.
The GD1 inverter is used to power the backlight, controlled by the OZ9972 PWM controller. The transformer T985 N9K2 is installed in the inverter converter. As power elements of the inverter, keys of the type SP8K4 are used.
The necessary supply voltages for all nodes of the SONY KLV-22BX301 TV are generated by the GD1 power module, or its analogs using FA5571 microchips and 10N80 type power switches.
MainBoard - the main board (motherboard) is a BAA module, using chips MT5388GFMG, TPA3110D2, 95503 0E32 and others.
The TEQE8-L01A tuner provides TV reception and channel tuning.
