Technical description and composition of the TV SONY KDL-40EX402, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40EX402
Chassis / Version: AZ1-N (3A-2)
Panel: LTY400HM01
T-CON: LJ9403055J 185763911 // FHD_MB4_C2LV1.4 LAU4041X1A-0, MAX17122, 17121E (6x4), MAX9591
Inverter (backlight): SSL400_10A01 REV: 0.4
PWM Inverter: SSI091ASN (24) // OZ964SN (20)
Power Supply (PSU): APS-253 APS-254 G2
PWM Power: CXA3809M, MIP2H2 (Standby)
MOSFET Power: K4096, 16N50C3
MainBoard: 1-881-019-32 - A-1767-672-A BEN A1763564A
IC MainBoard: Cpu: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2
Tuner: ENGS7401D5F
Control: RM-ED022 148782811
Technical Specifications KDL-40EX402
SONY KDL-40EX402
General recommendations for repairing TV LCD
Repair SONY KDL-40EX402 must begin with the diagnosis of a malfunction and a thorough inspection of its external and internal components, including those of the body. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize 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 assumptions about the causes and consequences of the malfunction.
In the absence of any signs of operability, when the SONY KDL-40EX402 does not turn on and does not signal anything with the control lights on the panel, the G2 ASP-253 ASP-254 power supply module is most likely to be faulty. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor K4096 .16N50C3. RSS090 P03 (8).
It should be remembered that in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the MIP2H2 PWM controller chip itself may be faulty (7). It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
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-40EX402 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.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
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.
In the event of a malfunction, on the BEN A1763564A motherboard, first of all, check the operability of all power supply stabilizers for the microcircuits and, if necessary, update the software (software).
Once again, remind users! Attempts to self-repair a SONY KDL-40EX402 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------> Sony KDL-32EX401, 32EX402, 37EX402, 40EX402, 46EX402 CHASSIS AZ1-N(3a-2)
Service manual / schematic diagram -------------> APS-252, APS-253, APS-254 Power supply
The appearance of MainBoard 1-881-019-32 is shown in the figure below:1-881-019-32
1-881-019-32 can be used in TVs:
SONY KDL-32BX300 (Panel LTY320AP05), SONY KDL-32EX402 (Panel LTY320HM01 03), SONY KDL-40EX402 (Panel LTY400HM01), SONY KDL-40EX600 (Panel LTY400HF06), SONY KDL-46EX402 (Panel LTY460HM01).
PSU Advanced
The KDL-40EX402 model uses the APS-253 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the FA5501A PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KDL-40EX402:
Installed matrix (LCD panel) LTY400HM01.
The matrix control uses the Timing Controller (T-CON) LJ9403055J.
An SSL400_10A01 inverter is used to power the backlight, it is controlled by the PWM controller SSI091ASN (24) // OZ964SN (20).
The necessary supply voltages for all nodes of the SONY KDL-40EX402 television are generated by the APS-253 power module or its analogs using CXA3809M, MIP2H2 (Standby) microcircuits and power switches of the K4096, 16N50C3 type.
MainBoard - the main board (motherboard) is a module 1-881-019-32, using Cpu chips: PNX85433EH1 NXP, Nand Flash: H27U1G8F2BTR, Spi Flash: M25P10A, Video: TDA19997HL / C1 Audio: TPA3110D2 and others.
The ENGS7401D5F tuner provides television reception and channel tuning.
Information from an alternative source:
SONY KDL-40EX402 Chassis AZ1-N
Panel Type (Matrix): LTY400HM01,
Motherboard:1-881-019-62, PNX85433EX1, K4T51163QG-HCE7 x2, H27U1G8F2BTR, 25P10VP, TDA19997HL/C1, D2817R, CXA3813N, TPA3110D2, PS54225 x2, Tuner: SUT-AE102T A-1763-564-A,
T-con: FHD_MB4_C2LV1.4, LAU4041X1A-Q, MAX17122, MAX9591, MAX17121E x2, 24C64WP, 402WP, I7975,
Inverter: SSI400-10A01 Rev 0.4, SSI091ASN, APM4018M x8,
PSU: APS-253 1-881-411-22, MIP2H2, CXA3809M, 16N50C3, K4096 x2
Remote control: RM-ED022
Additional technical information about the panel:
Brand: S-LCD
Model: LTY400HM01
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: 12/8 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 10 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
