Technical description and composition of the SONY KLV-32S550 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KLV-32S550
Chassis / Version: EX2
Panel: LTY320AP02 (04) 004
T-CON: 260AP01C2LV1.3
Inverter (backlight): SSI320_BC01
PWM Inverter: OZ964GN (20)
MOSFET Inverter: MDD1752 (3)
Power Supply (PSU): 1-878-661-12
MainBoard: A1707715B
Technical Specifications KLV-32S550A
SONY KLV-32S550
General recommendations for repairing TV LCD
Repair of a SONY KLV-32S550 TV is advisable to start with an external examination of all its constituent elements, both internal electronic components and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. 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.
Malfunctions of the power module 1-878-661-12 can be expressed in different ways, for example, the SONY KLV-32S550 does not turn on at all and the control lamps on its front panel do not light up and do not blink, there are no signs of operability. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in a breakdown state in such situations.
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 chip from the manufacturer.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
Sometimes the SONY KLV-32S550 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 the electrolytic capacitors of the filter by supplying the inverter itself, including the power supply unit (power supply unit).
Repair of the SSI320_BC01 inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
The motherboard A1707715B must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the power supply circuits of the microcircuits are working, a software update may be necessary.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service / Schematic manual -----------------> Sony KLV-26S550A KLV-32S530A KLV-32S550A KLV-37S550A/L/T CHASSIS EX2T KLV-26S550A, KLV-32S530A, KLV-32S550A, KLV-32S550A/L, KLV-32S550A/T, KLV-37S550A.
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).
Main features of the device SONY KLV-32S550:
Installed matrix (LCD panel) LTY320AP02 (04) 004.
The matrix control uses the Timing Controller (T-CON) 260AP01C2LV1.3.
The SSI320_BC01 inverter is used to power the backlight lamps; it is controlled by the OZ964GN PWM controller (20). As power elements of the inverter, keys of the MDD1752 type (3) are used.
The formation of the necessary supply voltages for all nodes of the SONY KLV-32S550 TV is carried out by the power module 1-878-661-12, or its analogues.
MainBoard - the main board (motherboard) is an A1707715B module.
Information from an alternative source:
SONY KLV-32S550A Chassis EX2T (September 2009)
Panel Type (Matrix): T315XW02 V.T
Motherboard: 1-878-659-22,
Invertor: DARFON 4H + V2258.041 / C, IR: 1-878-663-13 (1-730-490-13)
PSU: A1704563B PS6204 4A 1-878-661-12
Remote control: RM-GA016
Additional technical information about the panel:
Brand: S-LCD
Model: LTY320AP02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA