Technical description and composition of the RUBIN RB-26SL1U TV, panel type and modules used. The composition of the modules.RUBIN LED
Model: RB-26SL1U
Panel: LC260EXN (SD) (A3) LED
Power Supply (PSU): 465-01A2-L6501G K-150S1
MainBoard: 471-01A3-64701G MST6M48 / 6M182 T7
IC MainBoard: PAM8610
Tuner: CDT-3FP2I2-31
Specifications RB-26SL1U
RUBIN RB-26SL1U
General recommendations for TV LCD LED repair
Repair and diagnostics of any electronic device, in particular RUBIN RB-26SL1U, should be started with a careful external examination of the internal and external elements. Based on visible external changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of a defect before taking the necessary measurements. In some cases, defective elements can be seen with the naked eye, for example, charred resistors or swollen sintered capacitors, or electrolytic ones in rectifier filters. The formed ring cracks in the soldering of the terminals of transformers or heating circuit elements are also frequent sources of many malfunctions with a variety of external manifestations.
In the absence of any signs of operability, when the RUBIN RB-26SL1U does not turn on and does not signal anything with the control lamps on the panel, there is a possibility that the power supply module K-150S1 465-01A2-L6501G of the TV may malfunction. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When repairing a power supply, it is advisable to start diagnostics with checking the mains fuse and electrolytic capacitors of the filters of the secondary rectifiers of the converter. In the event of a break in the fuse, the cause should be sought in the power semiconductor elements of the pulse converter of the main power supply unit. First of all, it is necessary to check the diodes of the rectifier bridge of the mains voltage and the power switch (s) of the converter.
It should be remembered that in the practice of repair, usually power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the reason that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dry electrolytic capacitors or broken resistors in the primary circuit, or the PWM controller microcircuit itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If, when you turn on RUBIN RB-26SL1U, there is no image, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the LED circuit of the LC260EXN (SD) (A3) LED panel backlight, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the common power supply.
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
Repair of the MST6M48 / 6M182 T7 471-01A3-64701G motherboard must begin with diagnosing and checking all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
When repairing an MB board, it is necessary to check its PAM8610 components. Defective elements should be replaced. If BGA chips are installed, their failure is usually localized by warming up.
Before changing the CDT-3FP2I2-31 tuner, if it is not possible to tune to TV channels, you should make sure that there are supply voltages, including the power supply for varicaps (30-33V), which must be measured at the corresponding terminals of the tuner.
Attention to users! Independent repair of the RUBIN RB-26SL1U TV without proper qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-26SL1U , Main: MST6M48/6M182 T7 471-01A3-64701G, Panel: LC260EXN (SD)(A3) LED
The appearance of the MainBoard 471-01A3-64701G is shown in the figure below:471-01A3-64701G
471-01A3-64701G can be used in TVs:
ROLSEN RL-42L12002F (Panel LC420EUD (SD)(A1)), RUBIN RB-26SL1U (Panel LC260EXN (SD)(A3) LED).
External view of the power supply
Key features of the RUBIN RB-26SL1U device:
Installed matrix (LED panel) LC260EXN (SD) (A3) LED.
The formation of the necessary supply voltages for all nodes of the RUBIN RB-26SL1U TV is carried out by the 465-01A2-L6501G power module, or its analogs.
MainBoard - the main board (motherboard) is a 471-01A3-64701G module, using PAM8610 microcircuits and others.
The CDT-3FP2I2-31 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC260EXN-SDA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
RUBIN RB-26SL1U TV with LCD LC260EXN, diagonal size 26 "(66 cm) 16: 9 format. The required brightness of the screen of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 150,000: 1 is achieved by a special control of the LEDs. The LED panels of this TV are equipped with edge LED backlighting.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in a graphic resolution of 720p (HD Ready) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping is carried out in the standards 480i, 480p, 576i, 576p, 720p Supported multimedia file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker sound system power 20 W (2x10 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV x2, S-Video x2, component, VGA, HDMI x2, USB. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV in operating mode from the network is 85 watts.
Dimensions: without stand 654x422x42 mm.
TV weight: 6.8 kg.
Attention! The LC260EXN (SD) (A3) LED panel of the RUBIN RB-26SL1U LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.