Technical description and composition of the RUBIN RB-22S2UFD TV, panel type and modules used. The composition of the modules.RUBIN LED
Model: RB-22S2UFD
Chassis / Version: T.MS6M181.7A
Panel: 22 inch
LED driver (backlight): MKN_LE2360A-V02
PWM LED driver: EUP2589 (150B1)
MOSFET LED driver: STV6065
Power Supply (PSU): RS-400/120-S336
MainBoard: T.MS6M181.7A
IC MainBoard: MST6M181VS-LF-Z1, YD1517, SGM330A-YS, AIC2565
Specifications RB-22S2UFD
RUBIN RB-22S2UFD
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnostics of a malfunction. In this case, you should inspect all the internal components of the RUBIN RB-22S2UFD TV, as well as the external elements of the case. Often, according to certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are taken, which will determine a further algorithm for troubleshooting and localizing a defect. Electrolytic capacitors of filters with a swollen case, as well as ring cracks formed in the soldering of the leads of heating elements or a layer of coal on burnt resistors sometimes prompt the repairman about the causes of the malfunction and the possible consequences.
Malfunctions of the RS-400/120-S336 power supply module can be expressed in different ways, for example, RUBIN RB-22S2UFD does not turn on at all and the control lamps on its front panel do not light up or blink, all signs of operability are missing. It should be noted that the processor power regulator (converter) may be faulty with the same external manifestations. Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the mains rectifier, as well as the large electrolytic capacitor of the mains rectifier filter.
The reasons for the breakdown of the power switch in switching power supplies (SMPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller microcircuit or breaks of resistors in its strapping.
If the RUBIN RB-22S2UFD has no picture, but there is sound and the TV is controlled from the remote control, there is likely a malfunction in the panel backlight circuits. LEDs or power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to make sure that the electrolytic capacitors of the rectifier filter supplying the LED driver are in good working order, and check the LEDs by connecting those that are known to be working for diagnostics.
Often, in the absence of backlight, disassembly of the panel is required. It is necessary to check the serviceability of the LED transitions, as well as the reliability of the contact connections in the lines and connectors.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
Repair or diagnostics of the T.MS6M181.7A motherboard should begin with checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MST6M181VS-LF-Z1, YD1517, SGM330A-YS, AIC2565. Malfunctions in BGA chips are usually easy to detect by warm-up.
Remember! Attempts of self-repair by users of the RUBIN RB-22S2UFD TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> RUBIN RB-22S2UF Chassis: T.MS6M181.7A
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-22S2UF, Main: T.MS6M181.7A 11453, Panel: LE2360A-V02
The appearance of the MainBoard T.MS6M181.7A is shown in the figure below:Repairing the motherboard T.MS6M181.7A, which uses the multifunctional processor MST6M181VS, combined with a scaler, it is advisable to start by checking the stand-by power supply, which is implemented using a separate 3.3V linear stabilizer. Further, in the operating mode, you should check the operability of linear stabilizers or voltage converters required to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. DDR W9425G6JH memory requires 2.5V voltage. In the presence of a backlight and no image, it is advisable to measure the power supply of the LCD panel 5V or 12V, depending on the type of panel used, directly on the LVDS connector. If the TV does not come out of Stand-by, does not respond to the remote control and control buttons, you should update the SPI FLASH software.
T.MS6M181.7A can be used in TVs:
AKAI LEA-19V07P (Panel M185B3-LC1), AKAI LEA-22V07P (Panel M215HGE-L10 Rev.C1), ERISSON 22LEE01 (Panel CLAA215FA04), FUSION FLTV-D22H11 (Panel LQ215M1LGN2), HYUNDAI H-LED19V13 (Panel CX185LEDM ), HYUNDAI H-LED15V7 (Panel N156B6-L0B Rev. C1 / Rev. C2), HYUNDAI H-LEDVD24V10 (Panel M236H3-LA2), RUBIN RB-19S2U (Panel HT185WX1-100), RUBIN RB-22S2UF (Panel LE2360A-V02), RUBIN RB-22S2UFD (Panel 22 "), RUBIN RB-24S2UFD (Panel V236H1-P01).
Key features of the RUBIN RB-22S2UFD device:
Installed matrix (LED-panel) 22 inches.
To power the backlight LEDs, the MKN_LE2360A-V02 LED driver is used, controlled by the EUP2589 (150B1) PWM controller. The keys of the STV6065 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the RUBIN RB-22S2UFD TV is carried out by the RS-400 power module, or its analogs.
MainBoard - the main board (motherboard) is a T.MS6M181.7A module, using MST6M181VS-LF-Z1, YD1517, SGM330A-YS, AIC2565 and others.
RUBIN RB-22S2UFD LCD TV 22 "(56 cm) in 16: 9 format. The required brightness of the screen of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80000: 1 is achieved by special control of LED operation. -Panels of this TV are equipped with edge lighting from LEDs - Edge LED.The design and technical capabilities of the TV provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM Graphic processing and digital signal formation is performed in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats: MP3, WMA, MPEG4, VideoCD, Picture CD, JPEG.
The power of the sound system of 6 W (2x3 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, audio x2, component, VGA, HDMI, USB. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV in operating mode from the network is 48 watts.
Overall dimensions: 579x423x126 mm.
TV weight: 3.9 kg.
Attention! The panel of the RUBIN RB-22S2UFD 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.