Technical description and composition of the SONY KDL-40D3500 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-40D3500
Chassis / Version: WAX3F
Panel: LTY400HA01
Inverter (backlight): 1-873-815-12
Power Supply (PSU): 1-872-986-13
PWM Power: L6562 (PFC), CXD9841P, MIP2H2
MOSFET Power: 2SK3934, 2SK3561
MainBoard: 1-875-865-11 BE1F
IC MainBoard: MB91305, S29AL032D70TF103, CXD9921GB, HY27US08281A, V58C2256324SAH33, CXB1444R, BH7641FV, CXD9890AQ, TPA3100D2
Tuner: BTD-HF401Z (01)
Technical Specifications KDL-40D3500
SONY KDL-40D3500
General recommendations for repairing TV LCD
Possible manifestations of defects
- SONY KDL-40D3500 does not turn on, the indicators on the front panel do not light up and do not blink. The TV does not respond to the control buttons and the remote control.
In such cases, the malfunction should be sought first in the power module 1-872-986-13. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers L6562 (PFC), CXD9841P, MIP2H2, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- 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 power supply of the inverter 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, it is necessary to disable the inverter protection. In such cases, special care must be taken when working, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 1-875-865-11 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips MB91305, S29AL032D70TF103, СXD9921GB, HY27US08281A, V58C2256324SAH33, CXB1444R, BH7641FV, СXD9890AQ, TPA31 and other possible TPA312, etc. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the tuner BTD-HF401Z (01) and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, remind users! Attempts to self-repair a SONY KDL-40D3500 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
Service manual / schematic diagram -------------> SONY KDL-40D3400, KDL-40D3500, KDL-46D3400 , KDL-46D3500 Chassis WAX3F
Service manual / schematic diagram -------------> 1-872-986-13 Power supply
The appearance of MainBoard 1-875-865-11 is shown in the figure below:1-875-865-11
The appearance of the power supply
Main features of the device SONY KDL-40D3500:
Installed matrix (LCD panel) LTY400HA01.
An inverter 1-873-815-12 is used to power the backlight.
The necessary supply voltages for all nodes of the SONY KDL-40D3500 TV are generated by the power module 1-872-986-13, or its analogs using microchips L6562 (PFC), CXD9841P, MIP2H2 and power switches of the type 2SK3934, 2SK3561.
MainBoard - the main board (motherboard) is a module 1-875-865-11, using microchips MB91305, S29AL032D70TF103, СXD9921GB, HY27US08281A, V58C2256324SAH33, CXB1444R, BH7641FV, СXD9890AD, TPA31 and others.
The BTD-HF401Z (01) tuner allows you to receive television programs and tune to channels.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY400HA01
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: Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 1700: 1
Display Colors: 1.07B (10-bit), CIE1931 90%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V