Technical description and composition of the SONY KDL-40S3000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40S3000
Chassis / Version: SE1A
Panel: LTZ400WT-LH3 001
T-CON: 400WTC4LV3.4 - LJ94-01672M
Inverter (backlight): SSB400WA16 Rev0.9
Power Supply (PSU): 1-872-986-12 A-1268-619-A G3 Board
PWM Power: L6562 (PFC), CXD9841P, MIP2H2
MainBoard: 1-873-891-13
IC MainBoard: D61123F1-100, PLQFP208, MC74LVX138DTR2, TDA9973A
Tuner: BTD-HF401Z
Control: RM-ED009
Technical Specifications KDL-40S3000
SONY KDL-40S3000
General recommendations for repairing TV LCD
Like any other TV, SONY KDL-40S3000 should start repairing with an external inspection for visible changes in the external and internal elements. Often, according to the external signs and the nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for finding and localizing a malfunction. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the absence of any signs of operability, when the SONY KDL-40S3000 does not turn on and does not signal anything with the control lights on the panel, the power module A-1268-619-A G3 Board, Complete (KDL-40 / 46S30XX) is most likely to be faulty. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the SONY KDL-40S3000 TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (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.
Repairing the inverter is difficult because in case of any malfunction or emergency, even with uneven wear of the lamps, a protection is triggered, which turns it off for fire safety. Diagnostics become impossible and protection needs to be disabled.
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.
On the motherboard 8-597-613-00, in the event of a malfunction, you should first check the performance of all the power stabilizers of the microcircuits and, if necessary, update the software (software).
If there is no reception of television channels, but the TV works properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner BTD-HF401Z, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
Owners and users of the SONY KDL-40S3000 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 manual / schematic diagram ------------------> Sony KDL-32/40/46S3000 chassis SE1A
The appearance of MainBoard 1-873-891-13 is shown in the figure below:1-873-891-13
1-873-891-13 can be used in TVs:
SONY KDL-32S3000 K (Panel T315XW02 V.E), SONY KDL-40S3000 (Panel LTZ400WT-LH3 001).
The appearance of the power supply
Main features of the device SONY KDL-40S3000:
Installed matrix (LCD panel) LTZ400WT-LH3 001.
The matrix control uses the Timing Controller (T-CON) 400WTC4LV3.4.
To power the backlight used inverter SSB400WA16.
The necessary supply voltages for all nodes of the SONY KDL-40S3000 TV are generated by the power module 1-872-986-12, or its analogs using L6562 (PFC), CXD9841P, MIP2H2 microcircuits.
MainBoard - the main board (motherboard) is a module 1-873-891-13, using microcircuits D61123F1-100, PLQFP208, MC74LVX138DTR2, TDA9973A and others.
The BTD-HF401Z tuner provides TV reception and channel tuning.