Technical description and composition of the TV SONY KDL-40WE5, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40WE5
Chassis / Version: EX2L_ECO_BASIL
Panel: LTY400HF02 102
Inverter (backlight): integrated into PSU
PWM Inverter: LX1692F, BA10339F
Power Supply (PSU): 1-878-773-23 = 878-773-22 = IP3N
PWM Power: CXD9969P (16), MIP2H2, FA5501AN
MOSFET Power: 2SK3561
MainBoard: 1-878-942-22 A-1663-964-B BA board
IC MainBoard: MC10147F1 410, MB91F313A, NAND Flash K9F1208UOC, EEPROM 24c32
Tuner: BTD-HF422T
Control: RM-ED016
Technical Specifications KDL-40WE5W
SONY KDL-40WE5
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of the SONY KDL-40WE5 TV, like all others, with an external examination of possible changes, both external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization 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 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, it does not make any sounds or any signs of operability when it is turned on, there is a certain chance that the IP3N 1-878-773-23 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. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of an open circuit, the reason should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
As a rule, the keys of flyback converters, which use the N-Fet field effect transistor on a separate radiator, or integrated with the CXD9969P PWM controller (16), (7) into a single chip, are quite reliable 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 verified by replacing it with a known good one.
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If there is no image when you turn on the SONY KDL-40WE5, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often attempts to repair the 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.
Turning off the protection for diagnostic purposes, you must remember that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
The BA motherboard must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the power supply circuits of the microcircuits are working, a software update may be necessary.
The malfunction of the BTD-HF422T tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Schematic Diagram -----------------> Sony 878-773-22 IP3N board Power supply
The appearance of MainBoard 1-878-942-22 is shown in the figure below:
1-878-942-22
1-878-942-22 can be used in televisions:
SONY KDL-32W5500 (Panel T315XW02 V.1), SONY KDL-37V5500 (Panel T370HW02 V.B.), SONY KDL-40V5610 (Panel LTY400HA12), SONY KDL-40W5500 (Panel LTY400HF05), SONY KDL-40WE5 (Panel LTY400HF02 102), SONY KDL-46W5500 (Panel LTY460HF05), SONY KLV-46V550A (Panel T460HW03 V.2), SONY KDL-46W5740 (Panel LTY460HF05).
The appearance of the power supply
Main features of the device SONY KDL-40WE5:
Installed matrix (LCD panel) LTY400HF02 102.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller LX1692F, BA10339F.
The necessary supply voltages for all nodes of the SONY KDL-40WE5 TV are generated by the power module 1-878-773-23, or its analogs using microcircuits CXD9969P (16), MIP2H2, FA5501AN and power switches of the type 2SK3561.
MainBoard - the main board (motherboard) is a module 1-878-942-22, using microchips MC10147F1 410, MB91F313A, NAND Flash K9F1208UOC, EEPROM 24c32 and others.
The BTD-HF422T tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTY400HF02
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 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs HCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 10-bit), 55 pins
Voltage: 12.0V