Technical description and composition of the TV SONY KDL-40W5500, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40W5500
Chassis / Version: EX2L
Panel: LTY400HF05
T-CON: 4046NN_MB4C6LV0.6
Inverter (backlight): SSB400W12S01
Power Supply (PSU): IP1 A-1660-720-A
PWM Power: CXD9969P (PWM Resonant), MIP2H2 (Standby)
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-40W5500
SONY KDL-40W5500
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-40W5500 TV, both internal and external. 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.
In the absence of any signs of operability, when the SONY KDL-40W5500 does not turn on and does not signal anything with the control lights on the panel, the IP1 A-1660-720-A power supply module is most likely faulty. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch.
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-40W5500 does not have an image, there is sound and the channels switch, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
When repairing the SSB400W12S01 inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
The motherboard BA A-1663-964-B 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.
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.
Service manual / schematic diagram ---------------> Sony KDL-32/37/40/46W5500 chassis EX2L
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-40W5500:
Installed matrix (LCD panel) LTY400HF05.
The matrix control uses the Timing Controller (T-CON) 4046NN_MB4C6LV0.6.
To power the backlight used inverter SSB400W12S01.
The necessary supply voltages for all nodes of the SONY KDL-40W5500 TV are generated by the IP1 power supply module or its analogs using CXD9969P (PWM Resonant), MIP2H2 (Standby) microcircuits.
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.
Information from an alternative source:
SONY KDL-40W5500 Chassis EX2L
Panel Type (Matrix): LTY400HF05
Motherboard: A-1663-964-B,
T-con: 4046NN_MB4C6LV0.6,
Invertor: SSB400W12S01
PSU: A-1660-720-A, Key Cont roller: BQV970002A, IR Sensor: A-1704-202-A
Remote control: RM-ED016