Technical description and composition of the SONY KDL-40W4500 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40W4500
Chassis / Version: EG1L_100Hz
Panel: LTY400HC02 001
Inverter (backlight): SSB400W20S01 Rev 0.5
PWM Inverter: LM2903
Power Supply (PSU): IP5 1-876-467-21
PWM Power: R2A20112 (PFC 16pin), CXD9841P (18), MIP2H2 (7)
MOSFET Power: K3561, K3934, K3569
MainBoard: 1-877-366-13 - A-1184-536-C BGE board
IC MainBoard: TPA3100D2, CXD9926ATQ, MB90F334A
Control: RM-ED011
Technical Specifications KDL-40W4500
SONY KDL-40W4500
General recommendations for repairing TV LCD
Repair of electronic equipment usually begins with an external inspection of the device and diagnosis of the malfunction. In this case, you should visually carefully examine all the elements of the SONY KDL-40W4500 TV, both internal and external. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Electrolytic capacitors of filters with a swollen case, as well as ring cracks or a layer of coal on burned-out resistors formed in the soldered terminals of the heating elements, sometimes tell the repairman the causes of the malfunction and possible consequences.
In the case when the KDL-40W4500 does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, most likely in this case the IP5 1-876-467-21 power supply module is faulty. When diagnosing and repairing the IP5 1-876-467-21 power supply unit, the fuse must first be checked, and if it is broken, the power switch K3561, K3934, K3569 and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller 8E3.6 R2A20112, CXD9841P (18), MIP2H2 (7), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
Sometimes the SONY KDL-40W4500 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 electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit).
Often, attempts to repair the SSB400W20S01 Rev 0.5 inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Repair of the BGE A-1184-536-C motherboard should begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - TPA3100D2, CXD9926ATQ, MB90F334A and replace failed chips with new ones.
Attention to users! Self-repair of a SONY KDL-40W4500 TV without the appropriate qualifications and experience can lead to its complete unrepairability!
Service manual / schematic diagram ---------------> Sony KDL-40/46W4500 chassis EG1L
PSU / schematic diagram ---------------> Sony 1-876-467-11, 1-876-467-21 IP5 Power supply
The appearance of MainBoard 1-877-366-13 is shown in the figure below:1-877-366-13
1-877-366-13 can be used in TVs:
SONY KDL-40W4500 (Panel LTY400HC02 001), SONY KDL-52Z4500 (Panel 52 "), SONY KDL-40Z4500 (Panel LTY400HG01).
PSU Advanced
The IP5 power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on the R2A20112 16pin PWM controller, which evenly distributes high-frequency impulses 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-40W4500:
Installed matrix (LCD panel) LTY400HC02 001.
The SSB400W20S01 inverter is used to power the backlight, controlled by the LM2903 PWM controller.
The necessary supply voltages for all nodes of the SONY KDL-40W4500 TV are generated by the IP5 power supply module or its analogs using the R2A20112 (PFC 16pin), CXD9841P (18), MIP2H2 (7) microcircuits and power switches of the K3561, K3934, K3569 type.
MainBoard - the main board (motherboard) is a module 1-877-366-13, using microchips TPA3100D2, CXD9926ATQ, MB90F334A and others.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY400HC02
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive