Technical description and composition of the RUBIN RB-19S2U TV, panel type and modules used. The composition of the modules.RUBIN LED
Model: RB-19S2U
Chassis / Version: T.MS6M181.7A 11453
Panel: HT185WX1-100
LED driver (backlight): MKN5350 V1.3 LE185
Power Supply (PSU): adapter 12v1A PS36IBCAK3000E
MainBoard: T.MS6M181.7A 11453
IC MainBoard: MSTM181VS-LF-Z1, W9425G6JH-4, 25Q32BVSIG, YD1517P, DC / DC - AIC2565, MP1482DN
Tuner: CDT-3SP5I2-36. T.MS18VG.62B 11505
RUBIN LED
Model: RB-19S2U
Chassis / Version: T.MS18VG.62B
Panel: V185B1-PE1 A01 REV 1.0
PWM LED driver: GS5350F
MOSFET LED driver: ME15N10-G
Power Supply (PSU): AC / DC 12V, 3A
MainBoard: T.MS18VG.62B 11505
IC MainBoard: 1517P, JWT24.000, LD111733, LD1117A, 25Q32FV, AIC2565 GG2U
Tuner: CDT-3SP512-36
Specifications RB-19S2UD
RUBIN RB-19S2U
General recommendations for TV LCD LED repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all the internal components of the RUBIN RB-19S2U TV, as well as the external elements of the case. According to some external signs of a change in the state of some elements, it sometimes becomes possible to make assumptions about the nature of the defect, as well as to determine the further direction of troubleshooting. If charred resistors, swollen electrolytic or sintered capacitors, ring cracks in the soldering of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction, as well as to check the connected elements and assemblies.
In the absence of any signs of operability, when the RUBIN RB-19S2U does not turn on and does not signal anything with the control lamps on the panel, there is a possibility of a malfunction of the AC / DC 12V, 3A power supply module of the TV. The power supply regulator of the control processor on the motherboard may also be faulty with the same manifestations. First of all, it is necessary 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 the 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.
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 a PWM regulator microcircuit or breaks of resistors in its strapping.
If, when turning on the TV, the image appears and immediately disappears, or is absent initially when turned on, but there is sound and other functions work, there is a high probability of a malfunction of the LED driver (power converter for the panel backlight LEDs V185B1-PE1 A01 REV 1.0 // MKN185M112A2200114). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
A malfunction in the backlight circuits often occurs due to an open circuit in the power supply circuit of the LED lines. It is required to disassemble the panel and check the LEDs themselves, the ration of their outputs, as well as the reliability of the connections in the connectors and the ration of the connector pins.
An open circuit in the lines of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. It takes several tens of volts to open all the junctions, and it is best to use a current source for such purposes.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or microcircuit power converters and, if necessary, update the software (software).
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - 1517P, JWT24.000, LD111733, LD1117A, 25Q32FV, AIC2565 GG2U with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
Before changing the CDT-3SP512-36 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 the owners! Attempts to repair the RUBIN RB-19S2U TV yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> RUBIN LED RB-19S2U Chassis: T.MS6M181.7A
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> RUBIN RB-19S2U, Main: T.MS18VG.62B 11505, Panel: M185BGE-P02
In case of malfunctions in the software of SPI FLASH microcircuits manufactured by Winbond, they can recover for some time after temperature exposure - warming up a soldering station with a hairdryer or even a lighter. This is usually enough to read the standard software content. In such cases, the microcircuit must be replaced with a new one.
Additional MainBoard Repair
The appearance of the MainBoard T.MS18VG.62B is shown in the figure below:
T.MS18VG.62B
T.MS18VG.62B can be used in TVs:
BBK LEM2483F (Panel LG LC 230EUE(TD)(A1)), BBK LEM1983 (Panel LM185WH2 (TL)(A1)), DNS M24AM2 (Panel M236HGE-P02), DNS E16A90 (Panel LP156WH4 (TL)(A1)), ERISSON 23LEN60 (Panel LM230WF5), ERISSON 22LEN60 (Panel LS215AFTNO), ERISSON 24LEN60 (Panel LM230WF5 ), ERISSON 15LEN60 (Panel B156XW02 V.2), IZUMI TLE22F750B (Panel M215HGE-L10), RUBIN RB-19S2U (Panel V185B1-PE1 A01 REV 1.0), SUPRA STV-LC18250FL (Panel B173RW01 V.3).
The main features of the RUBIN RB-19S2U device:
Installed matrix (LED-panel) V185B1-PE1 A01 REV 1.0.
The backlight LEDs are powered by a converter controlled by the GS5350F PWM controller. The keys of the ME15N10-G type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the RUBIN RB-19S2U TV is carried out by the AC power supply module, or its analogues.
MainBoard - the main board (motherboard) is a T.MS18VG.62B module, using chips 1517P, JWT24.000, LD111733, LD1117A, 25Q32FV, AIC2565 GG2U and others.
The CDT-3SP512-36 tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V185B1-PE1
Type: a-Si TFT-LCD, CELL
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 6.0% (with Polarizer)
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
RUBIN RB-19S2UD TV with LCD M185B3-LA1, diagonal 19 "(48 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 70,000: 1 is achieved by special LED control The LED panel of this TV is 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 . Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media 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: 505x395x130 mm.
TV weight: 3.3 kg.
Attention! The panel M185B3-LA1 of the RUBIN RB-19S2UD 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.
