Technical description and composition of the SONY KLV-26NX400 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KLV-26NX400
Chassis / Version: AZ1A_5-2
Panel: V260B3-L05 Rev. C1
Power Supply (PSU): G1LS-E, PSC10307E M SanKen 2010
PWM Power: A6079M (7), SSC9513 (PWM Resonant), R2A20113 (PFC)
MOSFET Power: K10A60D, TPC8119 (8)
MainBoard: BAA board
IC MainBoard: MT5388GF MG, TPA3110D2, H5PS5162FFR, K9F1208UOC
Tuner: TEQE8-L01A
Technical Specifications KLV-26NX400
SONY KLV-26NX400
General recommendations for repairing TV LCD
Like any other TV, SONY KLV-26NX400 should be started to be repaired with an external inspection for visible changes in the external and internal elements. Often, for certain external signs, the repairman can draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In the absence of any signs of operability, when the SONY KLV-26NX400 does not turn on and does not signal anything with the control lights on the panel, the power module G1LS-E, PSC10307E M SanKen 2010 is most likely to be faulty. When diagnosing and repairing the power supply, first of all, check the fuse and if it is broken, the cause must be identified. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power switch K10A60D, TPC8119 (8).
In most cases, a breakdown of the N-Fet converter key does not occur for no reason, and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible PWM chip A6079M (7), SSC9513 (16), 5022 20113 (8) from the manufacturer.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked.
Repair of the inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety during depressurization of lamps, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits to be able to make the necessary measurements at the control points of the circuit.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Diagnosis and repair of the BAA motherboard is carried out by checking the performance of power stabilizers or updating the software (software).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
Service manual / schematic diagram ----------> Sony KLV-22BX300, KLV-26BX300, KLV-32BX300, KLV-40BX400 Chassis AZ1-A
psu / schematic diagram ----------> PSC10307E schematic diagram
The appearance of the MainBoard BAA is shown in the figure below:BAA
BAA can be used in TVs:
SONY KLV-22BX300 (Panel T216XW01 V.3), SONY KLV-22BX301 (Panel 22 "), SONY KLV-26BX301 (Panel V260B3-L05 Rev.C1), SONY KLV-26NX400 (Panel V260B3-L05 Rev.C1), SONY KLV-32BX300 (Panel LTY320AP04), SONY KLV-32BX301 (Panel LTY320AP05 006), SONY KLV-32NX500 (Panel T315HW04 V.0), SONY KLV-40BX400 (Panel LTZ400HM01 A13), SONY KLV-40BX401 (Panel LTY400HM01 A05 ), SONY KLV-32EX300 (Panel LTY320AP04), SONY KLV-40NX500 (Panel T400HW03 v.0).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the G1LS-E module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the R2A20113 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-26NX400:
Installed matrix (LCD panel) V260B3-L05 Rev. C1.
The necessary supply voltages for all nodes of the SONY KLV-26NX400 TV are generated by the G1LS-E power module or its analogs using A6079M (7), SSC9513 (PWM Resonant), R2A20113 (PFC) microcircuits and power switches of the K10A60D, TPC8119 type (8) .
MainBoard - the main board (motherboard) is a BAA module using MT5388GF MG, TPA3110D2, H5PS5162FFR, K9F1208UOC and other chips.
The TEQE8-L01A tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V260B3-L05
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8.5 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
