Technical description and composition of the TV SONY KDL-40Z4500, type of panel and applicable modules. The composition of the modules.SONY
Model: KDL-40Z4500
Chassis / Version: EG1L1
Panel: LTY400HG01
T-CON: 1-878-090-21
Inverter (backlight): 1-876-292-21
PWM Inverter: OZ9970, LD1117S50, LM339DT
MOSFET Inverter: 2SK3569
Power Supply (PSU): 1-877-271-12
PWM Power: MM3313AF, MIP2H2, CXD9841P
MOSFET Power: 2SK3561
MainBoard: 1-877-366-13 A-1184-536-C 603N4012-01R
IC MainBoard: CXD9926ATQ, CXD9926ATQ, TPA3100D2
Tuner: NoName
Technical Specifications KDL-40Z4500
SONY KDL-40Z4500
General recommendations for repairing TV LCD
Possible manifestations of defects
- The SONY KDL-40Z4500 TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light up and do not blink.
With such manifestations, the power module 1-877-271-12 usually fails. It is necessary to measure its output supply voltages, and if they are absent, check the operability of the power switches (2SK3561) of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) MM3313AF, MIP2H2, CXD9841P, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 1-877-366-13 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Board repair and replacement of CXD9926ATQ, CXD9926ATQ, TPA3100D2 microcircuits are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
In cases where there is no tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the NoName tuner. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
Attention! For users and owners of KDL-40Z4500 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual / Schematic Diagram ------------------> SONY KDL-40Z4500 Chassis EG1L1
PSU / Schematic Diagram ------------------> Sony 1-877-271-12 G6 board Power supply.
INVERTER / Schematic Diagram ------------------> 1-877-271-12 Inverter
The appearance of MainBoard 1-877-366-13 is shown in the figure below:1-877-366-13
1-877-366-13 can be used in TVs:
SONY KDL-40W4500 (Panel LTY400HC02 001), SONY KDL-52Z4500 (Panel 52 "), SONY KDL-40Z4500 (Panel LTY400HG01).
The appearance of the power supply
Main features of the device SONY KDL-40Z4500:
Installed matrix (LCD-panel) LTY400HG01.
The matrix control uses the Timing Controller (T-CON) 1-878-090-21.
To power the backlight, an inverter 1-876-292-21 is used, it is controlled by the PWM controller OZ9970, LD1117S50, 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-40Z4500 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 1-877-366-13, using CXD9926ATQ, CXD9926ATQ, TPA3100D2 and others.
The NoName tuner provides television reception and channel tuning.
