Technical description and composition of the RUBIN RB-40D5FT2C TV, panel type and modules used. The composition of the modules.RUBIN LED
Model: RB-40D5FT2C
Chassis / Version: TP.SIS231.PT851
Panel: 390HJ5-XCPE1
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536RGL
MainBoard: TP.SIS231.PT851
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
Specifications RB-40D5FT2C
RUBIN RB-40D5FT2C
General recommendations for TV LCD LED repair
Possible manifestations of defects
- RUBIN RB-40D5FT2C TV does not turn on at all. Control lamps do not light up or blink. The remote control and buttons on the control panel are unresponsive.
In such cases, the common power supply is often faulty - the AC / DC converter of the mains voltage, which is combined with the elements of the TP.SIS231.PT851 main board. It is necessary to measure the output voltages in the secondary circuits, and if they are absent, check the serviceability of the power switches of the converters and rectifier diodes for a possible breakdown (short circuit).
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse usually breaks off.
Breakdown of Mos-Fet keys used in switching power supplies is often caused by malfunctions of other elements, for example, supply, frequency setting, damper ... as well as elements of Negative Feedback Stabilization. The PWM microcircuit (PWM) LD7536RGL can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it reacts to the remote control. Or the image may appear for a second when turned on and immediately disappear.
Often in such cases, there is no backlighting of the LED panel. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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.
- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.
Repair or diagnostics of the TP.SIS231.PT851 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and the matrix. If necessary, you should update or replace 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 SPI Flash elements: 25Q64. Malfunctions in BGA chips are usually easy to detect by warm-up.
We remind users again! Attempts to repair the RUBIN RB-40D5FT2C TV without proper qualifications and the necessary experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-40D5FT2C, Main: TP.SIS231.PT851, Panel: 390HJ5-XCPE1
The appearance of the MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT851 can be used in TVs:
ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1).
Key features of the RUBIN RB-40D5FT2C device:
Installed matrix (LED panel) 390HJ5-XCPE1.
To power the backlight LEDs, a converter combined with the TP.SIS231.PT851 main board is used, controlled by the OB3350CP PWM controller. AOD4454 type keys are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback converter circuit using LD7536RGL microcircuits.
MainBoard - the main board (motherboard) is a TP.SIS231.PT851 module, using CPU: SIS231 chips, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
RUBIN RB-40D5FT2C TV with LCD 390HJ5-XCPE1, diagonal 40 "(102 cm) 16: 9 format. The required brightness of the screen 350 cd / m² is provided by LED backlight. Dynamic contrast ratio of 800,000: 1 is achieved by special LED control The LCD-panel of the TV is equipped with direct backlighting with rear-mounted LEDs - Direct 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 in accordance with the standard 1080p (Full HD) .Input high-frequency or video signal. can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. Uses the NICAM stereo signal processing system and the Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x3, 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, 1280x1024, 1360x768, 1920x1080.
The digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 908x584x185 mm, without stand 908x534x79 mm.
Attention! The 390HJ5-XCPE1 panel of the RUBIN RB-40D5FT2C 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.