Wednesday 11 March 2020

REPAIR / SERVICING TV SONY KLV-S26A10E

Technical description and composition of the SONY KLV-S26A10E TV, panel type and applicable modules. The composition of the modules.
SONY
Model: KLV-S26A10E
Chassis / Version: WAX
Panel: LTY260W2-L06
T-CON: 260W3C4LV5.0; AMLCD0516
PWM Inverter: BD9884 4pcs
Power Supply (PSU): 1-865-240-31 G2
PWM Power: FA5501N, STR-A6169, CXD9841M
MainBoard: A2E board1-867-365-11
IC MainBoard: MSP4411K-QA-D5-001, CXA20690, CXA2163AQ-T6, TPA3004D2PHPR, SVPEX-SREVB, K4D262338G
Technical Specifications KLV-S26A10E
SONY KLV-S26A10E
General recommendations for repairing TV LCD
The SONY KLV-S26A10E TV, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. Often, according to the external signs and the nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for finding and localizing a malfunction. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In the case when the KLV-S26A10E does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, most likely in this case the power module is faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of a break, the cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
If there is no image when you turn on the SONY KLV-S26A10E, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or the power converter (inverter) are malfunctioning. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often attempts to repair the inverter are hampered by the fact that the fault diagnosis is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Remember! Attempts to self-repair by users of the SONY KLV-S26A10E TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!


Service / Schematic  manual ----------------->   Sony KLV-S23A10E, KLV-S26A10E, KLV-S32A10E, KDL-S23A12U, KDL-S26A12U, KDL-S32A12U - WAX CHASSIS  KLV-S23A10E, KLV-S26A10E, KLV-S32A10E, KDL-S23A12U, KDL-S26A12U, KDL-S32A12U.

 
 The appearance of MainBoard A2E is shown in the figure below:
A2E
A2E can be used in TVs:
SONY KDL-S32A12U (Panel LTY320W2-L02), SONY KLV-S26A10E (Panel LTY260W2-L06).
The appearance of the power supply
Main features of the device SONY KLV-S26A10E:
Installed matrix (LCD panel) LTY260W2-L06.
The matrix control uses the Timing Controller (T-CON) 260W3C4LV5.0 ;.
To power the backlight, a converter is used, controlled by a 4pcs BD9884 PWM controller. .
The necessary supply voltages for all nodes of the SONY KLV-S26A10E TV are generated by the power module 1-865-240-31, or its analogs using the FA5501N, STR-A6169, CXD9841M microcircuits.
MainBoard - the main board (motherboard) is an A2E module, using microchips MSP4411K-QA-D5-001, CXA20690, CXA2163AQ-T6, TPA3004D2PHPR, SVPEX-SREVB, K4D262338G and others.
Additional technical information about the panel:
Brand: S-LCD
Model: LTY260W2-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: APVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 480 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 20/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V


 SONY KLV-S26A10E TV with LTY260W2-L06 LCD display, 26 "(66 cm) diagonal size in 16: 9 format.
The LTY260W2-L06 panel and the A2E board software allow viewing images in HD quality at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input analog video signal can be processed in PAL, SECAM, NTSC systems.
The power of the sound speaker system 20 W (2 x 10 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, SCART x2, RGB, VGA, HDMI. An output for connecting headphones is provided.
Overall dimensions: 658x474x90 mm.
TV Weight: 12.5 kg.
Attention! The LTY260W2-L06 panel of the SONY KLV-S26A10E LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!