Technical description and composition of the RUBIN RB-32SL1U TV, panel type and modules used. The composition of the modules.RUBIN LED
Model: RB-32SL1U
Chassis / Version: M182
Panel: LC320EXN SEA3
LED backlight: 6920L-0148A, 6922L-0010A
LED driver (backlight): PWW-LE32GX-O 6917L-0097A
PWM LED driver: BD9395
Power Supply (PSU): K-75L1
PWM Power: OB2273
MainBoard: MST6M182VG-T9B 471-01A2-61901G, M182-08P145-00960
IC MainBoard: CPU: MST6E182VG-LF-Z1, SPI Flash: GD25Q32
Tuner: KDTANW-14-09
Specifications RB-32SL1U
RUBIN RB-32SL1U
General recommendations for TV LCD LED repair
RUBIN RB-32SL1U TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. Charred paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering on the leads of heating elements or transformers can often suggest the causes of the defect and possible consequences.
Sometimes the RUBIN RB-32SL1U TV just won't turn on. No control lamps on the front panel are on or blinking, the TV does not respond to the remote control and does not emit any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the general power supply module K-75L1. If it works, check the processor batteries on the SSB (Main Board). The first step is to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse in the power supply is broken, in most cases a breakdown of the power switch (s) is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. You should also check the diodes of the rectifier bridge and the electrolytic capacitor of the mains rectifier filter.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur without reason and you should look for other faulty circuit elements that could provoke a defect. This can be dry electrolytic capacitors in the primary circuit, and faulty damper elements, as well as broken resistors or punctured semiconductor elements in the stabilization circuits. Possible defect of the PWM chip from the manufacturer.
If RUBIN RB-32SL1U does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction in the LED circuit of the LC320EXN SEA3 panel backlight, or their power converter - LED driver. Sometimes, when turned on, the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main power supply unit.
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.
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 or diagnostics of the M182-C8P145-02420 MST6M182VG KTDANW-14-09 motherboard should begin with checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
Attention to the owners! Attempts to repair the RUBIN RB-32SL1U TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> schematic diagram download MST6M182
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-32SL1U M182, MAIN: MST6M182VG-T9B, SPI FLASH: GD25Q32, PANEL: LC320EXN(SE)(A3)
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-32SL1U Main: 471-01A3-64801G, Cpu: MST6M48/MST6M182-T8B, Spi Flash: cFeon EN25Q32B-104HIP, Tuner: CTD-3FP2I2-31, Panel: LC320EXN (SD) (A1)
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> K-75L2 K-75L1 Power supply
The MainBoard is shown in the figure below:MST6M182VG-T9B
MST6M182VG-T9B can be used in TVs:
ERISSON 32LEK14 (Panel 720p HD 1366x768), HYUNDAI H-LED32V11 (Panel K320WLHA300), HYUNDAI H-LED32V5 (Panel K320WL), RUBIN RB-32SL1U (Panel LC320EXN SEA3).
External view of the power supply
Key features of the RUBIN RB-32SL1U device:
Installed matrix (LED panel) LC320EXN SEA3.
To power the backlight LEDs, the PWW-LE32GX-O LED driver is used, controlled by the BD9395 PWM controller.
The formation of the necessary supply voltages for all nodes of the RUBIN RB-32SL1U TV is carried out by the K-75L1 power module, or its analogs using OB2273 microcircuits.
MainBoard - the main board (motherboard) is an MST6M182VG-T9B module, using CPU chips: MST6E182VG-LF-Z1, SPI Flash: GD25Q32 and others.
The KDTANW-14-09 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SEA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Dithering), 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-32SL1U TV with LCD LC320EXN, 32 "(81 cm) in 16: 9 format. The required brightness of the screen of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 200,000: 1 is achieved by a special control of LED operation. 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 takes place in 480i, 480p, 576i, 576p, 720p, 1080i standards 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 110 watts.
Dimensions: without stand 778x501x41 mm.
TV weight: 11 kg.
Attention! The LC320EXN SEA3 panel of the RUBIN RB-32SL1U 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.