Technical description and composition of the SAMSUNG LE26A340J3 TV, type of panel and applicable modules. The composition of the modules.SAMSUNG
Model: LE26A340J3
Panel: V260B1-L13
Lamp backlight: 5 LAMP CCFL
T-CON: V260B1-XC13
Inverter (backlight): T87I027.09 CEM-1-97 (I260B1-12D)
PWM Inverter: OZ964GN, BA2902F
MOSFET Inverter: AO4614A, AO4013L
Power Supply (PSU): BN44-00208B
PWM Power: MC33067P
MainBoard: BN41-00982B
IC MainBoard: CPU: SAMS01, DRAM: EM6A9160TSOA-5G, SPI Flash: MX25L1605AM2I-12G, EEPROM: 24C256
Tuner: BN40-001116A
Control: BN41-00709A
Technical Specifications LE26A340J3
SAMSUNG LE26A340J3
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE26A340J3 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Failure in such cases should begin to be sought in the power supply circuits of BN44-00208B. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches and rectifier diodes of the converters for the presence of a possible short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. MC33067P PWM controllers, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new ones, or obviously working.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, the breakdown keys and the transformer secondary windings must be ringed in its converter.
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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-00982B motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - CPU: SAMS01, DRAM: EM6A9160TSOA-5G, SPI Flash: MX25L1605AM2I-12G, EEPROM: 24C256. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the tuner BN40-001116A may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to self-repair a TV SAMSUNG LE26A340J3 without the appropriate qualifications and necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-00982B is shown in the figure below:BN41-00982B
BN41-00982B can be used in TVs:
SAMSUNG LE32A330J1 (Panel T320HA01-AA), SAMSUNG LE32A430T1 (Panel V315B1-L01), Samsung Panel V260B1-L13), SAMSUNG LE37A330J1 (Panel CLAA370WA03 SJ), SAMSUNG LE26A340J3 (Panel V260B1-L13).
The appearance of the power supply
Main features of the SAMSUNG LE26A340J3 device:
Installed matrix (LCD panel) V260B1-L13.
The matrix control uses the Timing Controller (T-CON) V260B1-XC13.
To power the backlight, an inverter T87I027.09 is used, it is controlled by the PWM controller OZ964GN, BA2902F. As power elements of the inverter, keys of the type AO4614A, AO4013L are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE26A340J3 TV is carried out by the BN44-00208B power module, or its analogs using MC33067P microcircuits.
MainBoard - the main board (motherboard) is a BN41-00982B module using CPU chips: SAMS01, DRAM: EM6A9160TSOA-5G, SPI Flash: MX25L1605AM2I-12G, EEPROM: 24C256 and others.
The tuner BN40-001116A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V260B1-L13
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: 5 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V