Technical description and composition of the SONY KDL-26P2530 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-26P2530
Chassis / Version: SE-1
Panel: T315XW02 V1
Inverter (backlight): DRAF 4H.V0708.401
PWM Inverter: OZ964ISN
Trans Inverter: 4001Y650009 (GP) –03.
Power Supply (PSU): 1-870-685-21
PWM Power: MCZ3001DB, STR-A6169
MainBoard: 1-872-686-11 BDT
IC MainBoard: TDA9974AHS / 8/12, HY27US0828A, TDA7475, D61123F1-100
Technical Specifications KDL-26P2530K
SONY KDL-26P2530
General recommendations for repairing TV LCD
Diagnostics of the malfunction of the TV SONY KDL-26P2530, like all others, it is advisable to start with an external examination of possible changes, both external and internal elements. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize 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.
In cases where the SONY KDL-26P2530 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or, what it happens much less often - there is no processor power on the motherboard. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the possibility of an avalanche or thermal breakdown.
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, PWM controller MCZ3001DB, which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If the SONY KDL-26P2530 does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the display backlight, or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main PSU.
Repair of the DRAF 4H.V0708.401 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 when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order 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.
If the BDT 1-872-686-11 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. 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 TDA9974AHS / 8/12, HY27US0828A, TDA7475, D61123F1-100 and other possible faulty components.
Owners and users of the SONY KDL-26P2530 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!
Service manual / schematic diagram -------------------> Sony KDL-26P2520, KDL-32P2520, KDL-26P2530, KDL-32P2530, KDL-40P2530 chassis SE-1
psu / schematic diagram -------------------> 1-870-685-21
The appearance of MainBoard 1-872-686-11 is shown in the figure below:1-872-686-11
1-872-686-11 can be used in televisions:
SONY KDL-26P2530 (Panel T315XW02 V1), SONY KDL-32P2520 (Panel T315XW02 V.1.), SONY KDL-32P2530 (Panel T315XW02 V.1), SONY KDL-40P2530 (Panel LTA400WT-L05 1-802-386-21), SONY KDL-40U2520 (Panel LTA400WT-L05), SONY KDL-40U2530K (Panel LTA400WT-L05).
The appearance of the power supply
Main features of the device SONY KDL-26P2530:
Installed matrix (LCD panel) T315XW02 V1.
To power the backlight, a DRAF inverter is used, it is controlled by the OZ964ISN PWM controller. A transformer 4001Y650009 (GP) –03 is installed in the inverter converter.
The formation of the necessary supply voltages for all nodes of the SONY KDL-26P2530 TV is carried out by the power module 1-870-685-21, or its analogs using microchips MCZ3001DB, STR-A6169.
MainBoard - the main board (motherboard) is a 1-872-686-11 module, using TDA9974AHS / 8/12, HY27US0828A, TDA7475, D61123F1-100 microcircuits and others.
Additional technical information about the panel:
Brand: AUO
Model: T315XW02 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
