Technical description and composition of the SONY KDL-46V2000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-46V2000
Chassis / Version: WAX2
Panel: 46 inch 720p HD (1366x720)
Inverter (backlight): PCB2700 - A06-126438C - PCB2701 - A06-126439C
PWM Inverter: BD9886FV, LM2903
MOSFET Inverter: RSS065N06
Power Supply (PSU): 1-869-027-12
PWM Power: FA5501AN (PFC), CXD9841M, MIP2H2 (Standby)
MainBoard: 1-869-852-21 - 172723121
IC MainBoard: CXD0709GB, CXD9816AGG, CXD2097BQ, HTC63LVD1023, SIL9011CTV, SAA7115AHL, HY27US08281A
Tuner: BTD-HF431Z 1-869-657-12
Technical Specifications KDL-46V2000
SONY KDL-46V2000
General recommendations for repairing TV LCD
It is reasonable to start repairing a SONY KDL-46V2000 TV with a careful external inspection before proceeding to the diagnosis of the malfunction. It is advisable to carefully internal and external components. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
Malfunctions of the power module can be expressed in different ways, for example, the SONY KDL-46V2000 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.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
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.
In cases where the SONY KDL-46V2000 TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). 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.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Attention to users! Self-repair of a SONY KDL-46V2000 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------> Sony KDL 32/40/46V2000 chassis WAX2
The appearance of MainBoard 1-869-852-21 is shown in the figure below:1-869-852-21
1-869-852-21 can be used in televisions:
SONY KDL-40V2000 (Panel LTZ400WS-LH2), SONY KDL-46S2030 (Panel LTY460WS-L04), SONY KDL-46V2000 (Panel 46 " 720p HD (1366x720)), SONY KDL-26S2000 (Panel LTY260W2-L16).
PSU Advanced
The power module 1-869-027-12 is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on the FA5501AN PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device SONY KDL-46V2000:
Installed matrix (LCD-panel) 46 inches 720p HD (1366x720).
A PCB2700 inverter is used to power the backlight, controlled by a BD9886FV PWM controller, LM2903. As power elements of the inverter, keys of the type RSS065N06 are used.
The necessary supply voltages for all nodes of the SONY KDL-46V2000 TV are generated by the power module 1-869-027-12, or its analogs using the FA5501AN (PFC), CXD9841M, MIP2H2 (Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 1-869-852-21, using microchips CXD0709GB, CXD9816AGG, CXD2097BQ, HTC63LVD1023, SIL9011CTV, SAA7115AHL, HY27US08281A and others.
The BTD-HF431Z 1-869-657-12 tuner provides television reception and channel tuning.