Technical description and composition of the SONY KLV-32V550A TV, panel type and applicable modules. The composition of the modules.SONY
Model: KLV-32V550A
Chassis / Version: EX2L
Panel: LTY320HA03 A06
T-CON: FS_HBC2LV3.0
Inverter (backlight): I320-8C01
PWM Inverter: OZ9972ASN (24)
MOSFET Inverter: MDD1752
Power Supply (PSU): APS-243
PWM Power: FA5501, CXD9969P (16), MIP2H2 (8)
MainBoard: 1-878-942-12 BA board
IC MainBoard: CPU: MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24C32
Tuner: BTF-BG442T
Control: RM-GA015
Technical Specifications KLV-32V550A
SONY KLV-32V550A
General recommendations for repairing TV LCD
Like any other TV, SONY KLV-32V550A should start repairing with an external inspection for visible changes in the 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. 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.
In the event of a failure of the IP1 APS-243 power supply module, external manifestations may be different, for example, the SONY KLV-32V550A does not turn on at all and there is no indication of the control lights on the front panel. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The chip of the PWM controller CXD9969P (16) MIP2H2 (8) can also cause a breakdown of the power switch of the converter.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
If the SONY KLV-32V550A does not have an image, there is sound and the channels switch, 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.
Diagnostics of the I320-8C01 inverter can be difficult due to the operation of the protection, 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.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the inverter power elements. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair of the BAX2L motherboard should begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
In cases where there is no tuning to the local television channels, you should make sure that there is a varicap supply voltage (30-33V) and other supply voltages at the terminals of the BTF-BG442T tuner.
Owners and users of the SONY KLV-32V550A TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Service / Schematic manual -----------------> Sony KLV-32V530A, 32V550A/R/W, 40V530A 40V550A/R/W, 46V550A, 52V550A, CHASSIS EX2L KLV-32V530A, KLV-32V550A, KLV-32V550A/R, KLV-32V550A/W, KLV-40V530A, KLV-40V550A, KLV-40V550A/R, KLV-40V550A/W, KLV-46V550A, KLV-52V550A
Service / Schematic manual -----------------> Sony APS-243 Power supply
The appearance of MainBoard 1-878-942-12 is shown in the figure below:1-878-942-12
1-878-942-12 can be used on TVs:
SONY KDL-46V5500 (Panel LTY460HB11), SONY KLV-32V550A (Panel LTY320HA03 A06), SONY KLV-40V550A (Panel LTY400HA12), SONY KLV-52V550A (Panel LTY520HB11), SONY KDL-46V5610 (Panel LTY460HB10), SONY KDL-32V5610 (Panel LTY320HA02), SONY KDL-32V5500 (Panel LTY320HA02).
The appearance of the power supply
Main features of the device SONY KLV-32V550A:
Installed matrix (LCD panel) LTY320HA03 A06.
The matrix control uses the Timing Controller (T-CON) FS_HBC2LV3.0.
To power the backlight, an inverter I320-8C01 is used, it is controlled by the PWM controller OZ9972ASN (24). As power elements of the inverter, keys of the MDD1752 type are used.
The necessary supply voltages for all nodes of the SONY KLV-32V550A TV are generated by the APS-243 power module or its analogs using the FA5501, CXD9969P (16), MIP2H2 (8) microcircuits.
MainBoard - the main board (motherboard) is a module 1-878-942-12, using CPU chips: MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24C32 and others.
The BTF-BG442T tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY320HA03
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD