Technical description and composition of the SONY KDL-26U3000 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-26U3000
Chassis / Version: SE-2
Panel: V260B1-L07
T-CON: V260B1-C01
Inverter (backlight): I260B1-12E
PWM Inverter: 0Z964
Power Supply (PSU): A-1276-472-A 1-874-218-11 1-728-835-11
PWM Power: MCZ3001DB, MIP2H2, MM1530ATT, TDA8932BT, TDA8933
MainBoard: 1-874-223-13 (187422313)
IC MainBoard: CXD9922R, D61123F1-100, TDA9973AHL / 8/12, 24C32,128W3A2BN6, HYB25DC256160CE-6
Tuner: BTP-HC401 (10)
Control: Remote: RM-ED009, IR: 1-874-222-11
Technical Specifications KDL-26U3000
SONY KDL-26U3000
General recommendations for repairing TV LCD
Possible malfunctions
- The SONY KDL-26U3000 TV does not turn on. The control lights do not light or flash. On the remote control and the buttons on the control panel does not respond.
In this case, the main switching power supply (IIPS) A-1276-472-A may be faulty. It is necessary to measure its output supply voltages, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip MCZ3001DB, MIP2H2, MM1530ATT, TDA8932BT, TDA8933 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the power supply of the inverter are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the motherboard 1-874-223-13 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements CXD9922R, D61123F1-100, TDA9973AHL / 8/12, 24C32,128W3A2BN6, HYB25DC256160CE-6. BGA chip malfunctions are usually easy to detect by warming up.
If you suspect a malfunction of the BTP-HC401 tuner (10), first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Attention! For users and owners of KDL-26U3000 TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of MainBoard 1-874-223-13 is shown in the figure below:1-874-223-13
The appearance of the power supply
Main features of the device SONY KDL-26U3000:
Installed matrix (LCD panel) V260B1-L07.
The matrix control uses the Timing Controller (T-CON) V260B1-C01.
To power the backlight, an inverter I260B1-12E is used, it is controlled by a PWM controller 0Z964.
The necessary supply voltages for all nodes of the SONY KDL-26U3000 TV are generated by the A-1276-472-A power supply module or its analogs using MCZ3001DB, MIP2H2, MM1530ATT, TDA8932BT, TDA8933 microcircuits.
MainBoard - the main board (motherboard) is a module 1-874-223-13, using microcircuits CXD9922R, D61123F1-100, TDA9973AHL / 8/12, 24C32,128W3A2BN6, HYB25DC256160CE-6 and others.
Tuner BTP-HC401 (10) provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L07
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 12 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
