SONY
Model: KDL-32BX300
Chassis / Version: AZ1-FK
Panel: LTY320AP05
Inverter (backlight): SSI320_4UG01
PWM Inverter: SSI091ASN (24pin)
MOSFET Inverter: MDD1752
Power Supply (PSU): 3L314W - PSC10308E M 147420811
PWM Power: R2A20113 (PFC), STR-A6079M, SSC9513 (PWM Resonant)
MOSFET Power: K10A60D
MainBoard: 1-881-019-32 - A-1767-672-A - A1771378B BEN
IC MainBoard: Cpu: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2
Tuner: SUT-RE205TN EB1C29
Control: RM-YD035
Appearance
SONY KDL-32BX300
General recommendations for repairing TV LCD
Repair SONY KDL-32BX300 must begin with the diagnosis of a malfunction and a thorough inspection of its external and internal components, including those of the body. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases where the SONY KDL-32BX300 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the 3L314W power supply module is most likely faulty or, which is much less common - there is no processor power on the motherboard. 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.
Power switches in flyback converters fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The cause may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
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.
If the SONY KDL-32BX300 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often, attempts to repair the SSI320_4UG01 inverter are hampered by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
If the motherboard 1-881-019-32 is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
The malfunction of the EB1C29 SUT-RE205TN tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Remember! Attempts to self-repair by users of the SONY KDL-32BX300 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
Service manual / schematic diagram -------------------> Sony KDL-22BX300, KDL-32BX300 CHASSIS AZ1-FK
Service manual / schematic diagram -------------------> Sony KDL-32BX300, KDL-40BX400 CHASSIS AZ1-FK
The appearance of MainBoard 1-881-019-32 is shown in the figure below:1-881-019-32
1-881-019-32 can be used in TVs:
SONY KDL-32BX300 (Panel LTY320AP05), SONY KDL-32EX402 (Panel LTY320HM01 03), SONY KDL-40EX402 (Panel LTY400HM01), SONY KDL-40EX600 (Panel LTY400HF06), SONY KDL-46EX402 (Panel LTY460HM01).
The appearance of the power supply
Main features of the device SONY KDL-32BX300:
Installed matrix (LCD panel) LTY320AP05.
The SSI320_4UG01 inverter is used to power the backlight, controlled by the SSI091ASN PWM controller (24pin). As power elements of the inverter, keys of the MDD1752 type are used.
The necessary supply voltages for all nodes of the SONY KDL-32BX300 TV are generated by the 3L314W power module or its analogs using the R2A20113 (PFC), STR-A6079M, SSC9513 (PWM Resonant) microcircuits and K10A60D type power switches.
MainBoard - the main board (motherboard) is a module 1-881-019-32, using Cpu chips: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2 and others.
Tuner SUT-RE205TN EB1C29 provides the reception of television programs and tuning to channels.
Information from an alternative source:
SONY KDL-32BX300 chassis AZ1-FK
Panel Type (Matrix): LTY320AP05,
Motherboard: 1-881-019-32
Invertor: SSI320_4UG01
PSU: 3L314W
Remote control: RM-YD035
Additional technical information about the panel:
Brand: S-LCD
Model: LTY320AP05
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
