Technical description and composition of the RUBIN RB-22SL1F TV, panel type and modules used. The composition of the modules.RUBIN
Model: RB-22SL1F
Panel: LTM230HT01
Inverter (backlight): K-L-NM1 465-01A2-21401G
PWM Inverter: OB3362VP (MP3389EF)
MOSFET Inverter: ME60N03, SPP9527 (DIP-8)
Trans Inverter: LTS19E 1225
Power Supply (PSU): K-L-NM1 465-01A2-21401G
PWM Power: OB5269CP, NCP1271
MOSFET Power: SW7N65
MainBoard: 471-01A2-T7601G MJ16-A9P203-02582
IC MainBoard: HCF4052 SA7454, Z1071A1 (8), 4953P (8),
Control: HOF101631GPD9
Specifications RB-22SL1F
RUBIN RB-22SL1F
General recommendations for TV LCD repair
Repair and diagnostics of any electronic device, in particular RUBIN with a chassis, it is advisable to begin with a careful external examination of the internal and external elements. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. 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 case when the RB-22SL1F does not turn on, does not respond to the remote control and front panel buttons, does not blink lights and does not show any signs of operability, the K-L-NM1 465-01A2-21401G power supply module is probably faulty in this case. If it is working properly with such manifestations, it is necessary to check the processor power regulator (converter) on the motherboard.When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, the power elements of the transistors and diodes of the rectifier bridge should be checked for avalanche (thermal) breakdown.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, in case of their breakdown, it is necessary to look for a malfunction in the stabilization circuits, checking electrolytic capacitors, semiconductor devices and resistors in the primary circuit. The reason may be a malfunction of the PWM regulator microcircuit, which can only be checked by replacing it with a new or known good one.
If the RUBIN RB-22SL1F has no picture, but there is sound, there is a possibility of a malfunction of the backlight lamps or their power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are in good working order. It must be borne in mind that in the event of a disconnection of the inverter protection (for the purpose of diagnostics) there is a risk of failure of the power elements of the inverter and take special care. After carrying out repair work, the protection circuits must be restored for the further safe operation of the TV.
The motherboard KB-61G0 471-01A2-T7601G MJ16-A9P203-02582 must be checked if there is no response to the remote control and function buttons, the standby indicator blinks or is on continuously. In such cases, if the converters or power regulators of the microcircuits are working, it may be necessary to update the software. In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its HCF4052 SA7454, Z1071A1 (8), 4953P (8) chips, and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.
Additional MainBoard RepairAttention! Users and owners of RB-22SL1F TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
The appearance of the MainBoard 471-01A2-T7601G is shown in the figure below:
The 471-01A2-T7601G motherboard uses an MST6M16JS processor combined with a scaler, DDR WINBOND W9412G6JH-4 RAM, and 2Mb SPI FLASH ROM.
It is advisable to start repairing a MainBoard of this type with checking voltage converters and linear stabilizers necessary to provide power to the processor nodes, RAM, ROM and standby mode. Check the power supply of the LCD panel 5V or 12V, depending on the type of panel used, it is advisable directly on the LVDS connector. If, with the necessary supply voltages, the TV does not come out of Stand-by mode, does not respond to the remote control and control buttons, you should update the SPI Flash software.
471-01A2-T7601G can be used in TVs:HAIER L24F6 (Panel V236H1-L01), HYUNDAI H-LED22V4 (Panel LTM230HT05), ROLSEN RL-19L1002U (Panel LM185WH2-TL A1), RUBIN RB-22SL1F (Panel LTM230HT01).
External view of the power supply
Key features of the RUBIN RB-22SL1F device:
Installed matrix (LCD panel) LTM230HT01.
The K-L-NM1 inverter is used to power the backlight lamps, it is controlled by the OB3362VP PWM controller (MP3389EF). The LTS19E 1225 transformer is installed in the inverter converter. The keys of the ME60N03, SPP9527 (DIP-8) types are used as the power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the RUBIN RB-22SL1F TV is carried out by the K-L-NM1 power supply module, or its analogs using OB5269CP, NCP1271 microcircuits and power switches of the SW7N65 type.
MainBoard - the main board (motherboard) is a 471-01A2-T7601G module, using HCF4052 SA7454, Z1071A1 (8), 4953P (8) microcircuits, and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM230HT01
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.76x286.74 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
RUBIN RB-22SL1F TV with LCD display LTM230HT01, diagonal size 22 "(56 cm) 16: 9. The required brightness of the screen of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 40,000: 1 is achieved by special control of the LEDs. The technology of manufacturing the screen of this TV model is realized with LED backlighting.The design and technical capabilities of the TV provide for viewing programs and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the 1080p standard (Full HD) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal shaping occurs in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, WMA, JPEG.
Speaker power 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 x2, S-Video, 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 35 watts.
Dimensions: with stand 595x445x100 mm, without stand 535x394x36 mm.
Attention! The LTM230HT01 panel of the RUBIN RB-22SL1F 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.