Technical description and composition of the TV SONY KDL-40W2000, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40W2000
Chassis / Version: WAX2F
Panel: LTY400HS-LH3 // LTZ400HA03
T-CON: 400HSC4LV2
Inverter (backlight): PCB2676, A06-126268F, CSN303-00, PCB2677, A06-126269F
Power Supply (PSU): 1-871-504-11 A1207096A G2A board
PWM Power: CXD9841P, MIP2H2, FA5501AN (PFC)
MainBoard: 1-871-229-12, A1196582C, A1196581CAE - BE, TUE
IC MainBoard: CPU: MB91305; EEPROM: 24256B;
Tuner: BTD-HF431Z
Control: IR: 1-871-228-11 (172774111)
Technical Specifications KDL-40W2000
SONY KDL-40W2000
General recommendations for repairing TV LCD
SONY KDL-40W2000, like other televisions, it is advisable to start repairing by inspecting external and internal elements and modules. Often, by the visible signs of a change in the state of some elements, one can judge the causes of the defect. 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.
If the KDL-40W2000 TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power module. In some cases, there may be a malfunction only in standby power. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
In cases of attempts to repair the AE, BE, TUE motherboard, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating. Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MB91305; EEPROM: 24256B; It requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If the TV works normally from external devices, but does not tune into television channels, the BTD-HF431Z tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. Sometimes the cause of the inoperability of the tuner may be a software failure.
Attention to users! Self-repair of a SONY KDL-40W2000 TV without the appropriate qualifications and experience can lead to its complete unrepairability!
Service manual / schematic diagram ---------------> Sony KDL-40W2000, KDL-46W2000 chassis WAX2F
The appearance of MainBoard 1-871-229-12 is shown in the figure below:1-871-229-12
The appearance of the power supply
Main features of the device SONY KDL-40W2000:
Installed matrix (LCD panel) LTY400HS-LH3 or LTZ400HA03.
The matrix control uses the Timing Controller (T-CON) 400HSC4LV2.
A PCB2676 inverter is used to power the backlight.
The necessary supply voltages for all nodes of the SONY KDL-40W2000 TV are generated by the power module 1-871-504-11, or its analogs using CXD9841P, MIP2H2, FA5501AN (PFC) microcircuits.
MainBoard - the main board (motherboard) is a module 1-871-229-12, using CPU chips: MB91305; EEPROM: 24256B; and others.
The BTD-HF431Z tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY400HS-LH3
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 90%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V