Technical description and composition of the SONY KDL-40X4500 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40X4500
Chassis / Version: EG1H
Panel: LTY400HC02 001
T-CON: 404652ASNC6LV4.5; XC95144XL, TQG100AWN0821, CXD9935GB, LMU4148T1, TPS65167A
Inverter (backlight): LJ97-01577B 185704612 + G6
PWM Inverter: R2A20112DD
MOSFET Inverter: 2SK3934
Power Supply (PSU): 1-877-271-12 G6 board
PWM Power: MM3313AF, MIP2H2, CXD9841P
MOSFET Power: 2SK3561
MainBoard: 1-877-329-11 FBA board
IC MainBoard: RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU;
Tuner: 1-876-560-11 AE board
Control: RM-ED012 148089512
Technical Specifications KDL-40X4500
SONY KDL-40X4500
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of a SONY KDL-40X4500 TV, like all others, with an external examination of possible changes, both external and internal elements. Many visible signs make it possible to determine the future direction of troubleshooting and localization of the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
In case of a power supply module malfunction, external manifestations may be different, for example, the SONY KDL-40X4500 does not turn on at all and there is no indication of the indicator lights on the front panel. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the likelihood of an avalanche or thermal breakdown.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If the SONY KDL-40X4500 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. The lamps or the power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
When repairing the LJ97-01577B 185704612 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.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
The FBA A1568320A 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.
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-40/46/55X4500 chassis EG1H
PSU / Schematic Diagram ------------------> Sony 1-877-271-12 G6 board Power supply
The appearance of MainBoard 1-877-329-11 is shown in the figure below:1-877-329-11
1-877-329-11 can be used in TVs:
SONY KDL-40X4500 (Panel LTY400HC02 001), SONY KDL-55X4500 (Panel LTY550HF01-001).
The appearance of the power supply
Main features of the device SONY KDL-40X4500:
Installed matrix (LCD panel) LTY400HC02 001.
The matrix control uses the Timing Controller (T-CON) 404652ASNC6LV4.5 ;.
To power the backlight, an LJ97-01577B inverter is used, it is controlled by the PWM controller R2A20112DD. As power elements of the inverter, keys of the type 2SK3934 are used.
The necessary supply voltages for all nodes of the SONY KDL-40X4500 TV are generated by the power module 1-877-271-12, or its analogs using microcircuits MM3313AF, MIP2H2, CXD9841P and power switches of the type 2SK3561.
MainBoard - the main board (motherboard) is a module 1-877-329-11, using the RSS050P03, SAA7115AHL, THC7984-I7, CXB1446R, D61300F1-230, SiL9151CLU microcircuits; and others.
The tuner 1-876-560-11 AE board provides reception of television programs and tuning to channels.
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