Technical description and composition of the SONY KDL-40L4000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40L4000 K
Chassis / Version: EG1L
Panel: LTZ400HA07 A03 // LTY400HA06
T-CON: 400HAC2LV3.0
Inverter (backlight): SSB400W16S01 Rev0.5
PWM Inverter: LX1692BIDW, LM339DT
MOSFET Inverter: 2SK3569
Power Supply (PSU): A-1511-380-D 1-876-467-13
PWM Power: CXD9841P, MIP2H2 (Standby)
MOSFET Power: 2SK3561, 2SK3934 (PFC)
MainBoard: 1-877-114-12 BE2 A-1561-861-A
IC MainBoard: CPU: UPD61123F1-100-KA3-A, MB90F334APMC-GE1; DRAM: HYB25DC256160CE-6; NAND Flash: NAND128W3A2BN6F; SOUND: TPA3100D2PHPR;
Tuner: BTD-HF411T
Technical Specifications KDL-40L4000
SONY KDL-40L4000
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-40L4000 K TV, both internal and external. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize 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 absence of any signs of operability, when the SONY KDL-40L4000 K does not turn on and does not signal anything with the control lights on the panel, the power module is most likely faulty. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
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 the SONY KDL-40L4000 K TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Diagnostics of the inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
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.
We recommend the owners of the KDL-40L4000 K TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual / schematic diagram -------------> Sony KDL-40V4000, KDL-46V4000, KDL-52V4000 CHASSIS EG1L-L
The appearance of MainBoard 1-877-114-12 is shown in the figure below:1-877-114-12
1-877-114-12 can be used on TVs:
SONY KDL-40L4000 K (Panel LTZ400HA07 A03), SONY KDL-40V4210 (Panel LTZ400HA07), SONY KDL-46V4000 (Panel LTY460HB08 002), SONY KDL-40U4000 (Panel LTY400HA11).
PSU Advanced
The KDL-40L4000 TV is equipped with the A-1511-380-D power module using the PFC (Power Factor Correction) node acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the MAX232N PWM controller eliminates the prolonged absence of the charging current of the rectifier filter's electrolytic capacitor for a period of 50 Hz, and the envelope of high-frequency pulses of the consumed current takes the form of a sinusoid.
The appearance of the power supply
Main features of the device SONY KDL-40L4000:
Installed matrix (LCD panel) LTZ400HA07 A03 or LTY400HA06.
The matrix control uses the Timing Controller (T-CON) 400HAC2LV3.0.
To power the backlight, an inverter SSB400W16S01 is used, it is controlled by the PWM controller LX1692BIDW, LM339DT. As power elements of the inverter, keys of the 2SK3569 type are used.
The necessary supply voltages for all nodes of the SONY KDL-40L4000 TV are generated by the A-1511-380-D power module or its analogs using CXD9841P, MIP2H2 (Standby) microcircuits and power switches of the 2SK3561, 2SK3934 (PFC) type.
MainBoard - the main board (motherboard) is a module 1-877-114-12, using CPU chips: UPD61123F1-100-KA3-A, MB90F334APMC-GE1; DRAM: HYB25DC256160CE-6; NAND Flash: NAND128W3A2BN6F; SOUND: TPA3100D2PHPR; and others.
The BTD-HF411T tuner provides TV reception and channel tuning.
