Technical description and composition of the SONY KDL-32S2000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-32S2000
Chassis / Version: WAX2
Panel: LTZ320WS-L05
T-CON: 320WSC4LV1.1
Inverter (backlight): KPC 2294V-0 PSB2675 8 lamps
PWM Inverter: BD9886FV LM2301
Power Supply (PSU): APS-220 (CH) 1-468-980-12 G1
PWM Power: FA5501AN (PFC), MIP2H2, CXD9841M
MOSFET Power: RSS065 N06
MainBoard: 1-869-850-15
IC MainBoard: MB91305 BD9775FV CXD9199CG
Tuner: BTD-HF431Z 1-869-657-12 TUE AE
Technical Specifications KDL-32S2000
SONY KDL-32S2000
General recommendations for repairing TV LCD
SONY KDL-32S2000 TV, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. 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 some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
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 G1 APS220 (CH) 1-468-980-12 power supply 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. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch RSS065 N06 for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip FA5501AN G, MIP2H2, CXD9841M or breakage of resistors in its bundle.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SONY KDL-32S2000 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
In most cases, the diagnosis and repair of the KPC 2294V-0 PSB2675 inverter 8 lamps is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or open circuits in high voltage circuits and when the lamps are depressurized. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
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.
In cases of attempts to repair the motherboard TUE 1-869-657-12 AE1-869-850-15, it is necessary to check the operability of the power supply circuits of the microcircuits and, if possible, update the software (software). When repairing an MB board, you must check its components MB91305 BD9775FV CXD9199CG. Defective items should be replaced.
Before replacing the BTD-HF431Z tuner, if there is no tuning for the channels, you must first check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Attention to the owners! Attempts at self-repair of the SONY KDL-32S2000 TV are not recommended by the manufacturer and can lead to serious negative consequences!
Service manual / schematic diagram -------------------> Sony KDL-26S2000, KDL-32S2000, KDL-40S2000, KDL-46S2000, KDL-26S2010, KDL-32S2010, KDL-40S2010, KDL-46S2010, KDL-26S2020, KDL-32S2020 CHASSIS WAX2
PSU / schematic diagram -------------------> Sony APS-220 Power supply
The appearance of MainBoard 1-869-850-15 is shown in the figure below:1-869-850-15
1-869-850-15 can be used on TVs:
SONY KDL-26S2010 (Panel LTY260W2-L1), SONY KDL-32S2000 (Panel LTZ320WS-L05), SONY KDL-40S2530 (Panel LTY400WT-LH1), SONY KDL-46S2530 (Panel LTY460WT-LH3).
PSU Advanced
The KDL-32S2000 model uses the APS-220 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the FA5501AN PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KDL-32S2000:
Installed matrix (LCD-panel) LTZ320WS-L05.
The matrix control uses the Timing Controller (T-CON) 320WSC4LV1.1.
To power the backlight, a KPC inverter is used, controlled by the BD9886FV LM2301 PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-32S2000 TV are generated by the APS-220 power module or its analogs using FA5501AN (PFC), MIP2H2, CXD9841M microcircuits and power switches of the type RSS065 N06.
MainBoard - the main board (motherboard) is a module 1-869-850-15, using microchips MB91305 BD9775FV CXD9199CG and others.
Tuner BTD-HF431Z 1-869-657-12 TUE AE provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: S-LCD
Model: LTZ320WS-L05
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA