Technical description and composition of the TV SONY KLV-V26A10E, type of panel and applicable modules. The composition of the modules.SONY
Model: KLV-V26A10E
Chassis / Version: AT2X
Panel: LTY260W2-L06
Lamp backlight: 8 CCFL
T-CON: 260W3C4LV5.0
Inverter (backlight): integrated into PSU
PWM Inverter: BD9884FV, IR21084S, BA10339F-E2
MOSFET Inverter: 2SK3797
Power Supply (PSU): 1-866-355-22 - MIX5
PWM Power: CXD9841M (PWM Resonant), FA5501N-TE1 (PFC), STR-A6169 (Standby)
MOSFET Power: 2SK3934 (PFC), 2SK3563
MainBoard: 1-867-474-11 1-867-474-11 A1, A2, N, NP1 AT2X Boards
IC MainBoard: CXD9756R, CXD2097B0, PW166B, CXD3807, M24C16, MSP4411K-QA-D5-401, CXA2181Q-T6;
Tuner: BTP-DC412Z
Technical Specifications KLV-V26A10E
SONY KLV-V26A10E
General recommendations for repairing TV LCD
Any repair usually begins with an external inspection. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Useful tips can include swollen capacitors, ring cracks formed in the soldered terminals, a charred paint layer on the resistors, signs of overheating of the board, and many other external signs familiar to experienced repairmen.
If the SONY KLV-V26A10E does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power supply module 1-866-355-22 - MIX5 malfunctioning. In some cases, only the processor power regulator may be faulty. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Options are 2SK3934 (PFC), 2SK3563.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) 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 PWM Push-Pull chip, FA5501N-TE1 (PFC), STR-A6169 (Standby) may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the SONY KLV-V26A10E TV does not have an image, but there is sound, make sure that the power supply for the backlight lamps (inverter) is working properly. It is also necessary to check the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for excessive ESR. If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
Repair of the AT2X motherboard should begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CXD9756R, CXD2097B0, PW166B, CXD3807, M24C16, MSP4411K-QA-D5-401, CXA2181Q-T6; and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before replacing the BTP-DC412Z tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Owners and users of the SONY KLV-V26A10E TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
power supply Service manual / schematic diagram ---------------> KLV-V26A10E 1-866-355-22 - MIX5
Service manual / schematic diagram ---------------> Sony KLV-V26A10E, KLV-V32A10E, KDL-V26A12U, KDL-V32A12U - AT2X CHASSIS
Service Manual 115 pages for the model KLV-V26A10E, KLV-V32A10E, KDL-V26A12U, KDL-V32A12U
According to the conditions of compliance with modern world standards for household switching power supplies, the module 1-866-355-22 provides for the use of a power factor correction unit (Power Factor Correction). The PFC circuit is a flyback converter based on the FA5501N-TE1 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the device SONY KLV-V26A10E:
Installed matrix (LCD panel) LTY260W2-L06.
The matrix control uses the Timing Controller (T-CON) 260W3C4LV5.0.
To power the backlight lamps, a converter is used, combined with a power supply unit, controlled by the BD9884FV, IR21084S, BA10339F-E2 PWM controller. As power elements of the inverter, keys of the 2SK3797 type are used.
The necessary supply voltages for all nodes of the SONY KLV-V26A10E TV are generated by the power module 1-866-355-22, or its analogs using microcircuits CXD9841M (PWM Resonant), FA5501N-TE1 (PFC), STR-A6169 (Standby) and power keys of type 2SK3934 (PFC), 2SK3563.
MainBoard - the main board (motherboard) is a module 1-867-474-11, using microcircuits CXD9756R, CXD2097B0, PW166B, CXD3807, M24C16, MSP4411K-QA-D5-401, CXA2181Q-T6; and others.
The BTP-DC412Z tuner provides TV reception and channel tuning.
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