Technical description and composition of the TV SONY KLV-26BX301, type of panel and applicable modules. The composition of the modules.SONY
Model: KLV-26BX301
Chassis / Version: AZ1A_5-2
Panel: V260B3-L05 Rev. C1 // T260XW05 V.0
Inverter (backlight): CMO T87I066.00 ETL-XPC-207 // 4H.V3138.001 / B1 DARFON
PWM Inverter: AP11A21SN (28)
MOSFET Inverter: AO D418 BA94484
Trans Inverter: 4066L 1002FI
Power Supply (PSU): G1LS-E 3L312W PSC10307E
PWM Power: SSC9513 (PWM Resonant), R2A20113 (PFC), A6079 (Standby)
MainBoard: BAA board A1768170B
IC MainBoard: MT5388GF MG, TPA3110D2, H5PS5162FFR, K9F1208UOC
Tuner: TEQE8-L01A
Control: Remote: RM-GGA019, IR: 1-880-416-11
Appearance
SONY KLV-26BX301
General recommendations for repairing TV LCD
It is advisable to start diagnosing a malfunction of a SONY KLV-26BX301 TV, like all others, with an external examination of possible changes, both external and internal elements. It often happens that some damage to elements or connections will help determine the correct direction of troubleshooting and localization of the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the power module G1LS-E 3L312W is malfunctioning, the external manifestations may be different, for example, the SONY KLV-26BX301 does not turn on at all and there is no indication of the indicator lights on the front panel. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors of the N-FET type fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the binding of the PWM controller microcircuit SSC9513 (16) A6079 (7) 147419911, which it is desirable to check by replacement, are subject to verification.
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
In cases where the SONY KLV-26BX301 TV has lost an image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
Turning off the protection for diagnostic purposes, you must remember that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
If the BAA A1768170B motherboard is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
If the TV works normally from external devices, but does not tune into television channels, the TEQE8-L01A tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Once again, remind users! Attempts to self-repair a TV SONY KLV-26BX301 without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual / schematic diagram --------------> Sony KLV-22BX300, KLV-26BX300, KLV-32BX300, KLV-40BX400 Chassis AZ1-A
psu / schematic diagram --------------> PSC10307 Power supply
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
The KLV-26BX301 model uses a G1LS-E power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, this is a boost converter based on the R2A20113 PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor from the network directly through the open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the device SONY KLV-26BX301:
Installed matrix (LCD panel) V260B3-L05 Rev. C1 or T260XW05 V.0.
A CMO inverter is used to power the backlight, controlled by the AP11A21SN PWM controller (28). The transformer 4066L 1002FI is installed in the inverter converter. As power elements of the inverter, keys of the type AO D418 BA94484 are used.
The necessary supply voltages for all nodes of the SONY KLV-26BX301 TV are generated by the G1LS-E power module or its analogs using SSC9513 (PWM Resonant), R2A20113 (PFC), A6079 (Standby) microcircuits.
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