Technical description and composition of the ROLSEN RL-22L1002UF TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-22L1002UF
Chassis / Version: MST6M181
Panel: LTM215HT04 B2 (5v)
LED driver (backlight): PNM1 B8Q342-92233 K-L-NM1
PWM LED driver: MP3389EF (28)
MOSFET LED driver: ME15N10, SPP9527 (DIP-8)
Power Supply (PSU): K-L-NM1 PNM1 B8Q342-92233 465-01A2-21402G Rev1.0
PWM Power: 1271A (8pin), OB5269CP
MOSFET Power: WFF8N60
MainBoard: MST6M181-T7S T7 471-01A2-61702G RevA2
IC MainBoard: CPU: MST16M181VS-LF-Z1, SPI FLASH: EN25P32, EEPROM: FM24C02A, FM24C04A, II6633E-P, SGM330, 1517P
Tuner: F50CT-2DD-E (X)
RL-22L1002UF Specifications
ROLSEN RL-22L1002UF
General recommendations for TV LCD LED repair
It is advisable to start repairing the ROLSEN RL-22L1002UF TV with a careful external examination of both internal and external elements. 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 taking the necessary measurements, which will make it possible to determine a further algorithm for troubleshooting and localizing a defect. 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 a defect and possible consequences.
If the TV does not turn on, none of the indicators on its front panel will light or blink. Also, if the TV does not respond to the remote control and buttons, does not emit any sounds and any signs of operability when turned on, there is a certain probability that the power module KL-NM1 PNM1 B8Q342-92233 465-01A2-21402G Rev1.0 is faulty and it needs repair ... Sometimes a problem with similar manifestations can occur only in the absence of processor power, which is typical for certain ROLSEN models. When repairing a power supply, it is advisable to start diagnostics with checking the mains fuse and electrolytic capacitors of the filters of the secondary rectifiers of the converter. In the event of a break in the fuse, the cause should be sought in the power semiconductor elements of the pulse converter of the main power supply unit. First of all, it is necessary to check the diodes of the mains voltage rectifier bridge and the power switch (keys) of the ME15N10, WFF8N60 converter.
It should be borne in mind that in the practice of repair, it is extremely rare for key transistors in switching power supplies (SMPS) to fail without reasons that should be looked for by checking other components, for example, a key breakdown can provoke faulty elements of damper circuits, or dried electrolytic capacitors or broken primary resistors power supply circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the 1271A PWM regulator microcircuit (8) are subject to verification, which it is advisable to check by replacement.
If ROLSEN RL-22L1002UF 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 LTM215HT04 B2 (5v) 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 supply filter of the LED driver itself, including in the secondary rectifier of the main power supply unit.
In most cases of lack of backlighting, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or more LEDs do not work in one line, therefore, they are punctured and should be replaced.
It is impossible to detect an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable 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).
If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU: MST16M181VS-LF-Z1, SPI FLASH: EN25P32, EEPROM: FM24C02A, FM24C04A, II6633E-P, SGM330, 1517P. Defective components must be replaced.
F50CT-2DD-E (X) tuner malfunction is established after checking the software and all supply voltages at its terminals, including the supply voltage of varicaps (30-33V).
Remember! Attempts to repair the ROLSEN RL-22L1002UF TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> ROLSEN RL-22L1002UF, Main: MST6M181
To reduce the backlight current in LED drivers with a PWM controller MP3389EF (MP3389), or its analog OB3362VP (28 pin), the total resistance of the resistors from pin 9 (ISET) to the case should be proportionally increased. The maximum current in each of the 12 channels (in milliamperes) for the resistance Rset (in kilo-ohms) is determined from the ratio 1000 * 1.22V / Rset. When the channels are connected in parallel, the currents are summed up.
Additional MainBoard Repair
The appearance of the MainBoard MST6M181-T7S is shown in the figure below:The MST6M181-T7S motherboard uses an MST6M181VS-LF-Z1 processor combined with a scaler, external random access memory (RAM) DDR Winbond W9425G6JH type and SPI flash ROM 25Q32.
It is advisable to start MainBoard repair by checking the supply voltages of the linear stabilizers and voltage converters required to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. The power supply of the LCD panel is 5V or 12V, depending on the type of panel used, it can be measured directly at the LVDS connector. In cases where the TV does not come out of Stand-by mode, does not respond to the remote control and control buttons in the presence of all supply voltages, the SPI Flash software should be updated.
MST6M181-T7S can be used in TVs:
ERISSON 22LEK14 (Panel M215H3-LA1 REV.C1), ROLSEN RL-17L1002U (Panel LTN173KT01-A01), ROLSEN RL-17L1002U (Panel LTN173KT02 ), ROLSEN RL-19L1002U (Panel 19 "), ROLSEN RL-22L1002UF (Panel LTM215HT04 B2 (5v)), ROLSEN RL-23L1002UF (Panel M230WA01-ED G2 EE01 LED), RUBIN RB-19SL1U (Panel 19 "), RUBIN RB-22SL1UF (Panel LTM215HT04 led), RUBIN RB-23SL1UF (Panel 23 ").
External view of the power supply
The main features of the ROLSEN RL-22L1002UF device:
Installed matrix (LED panel) LTM215HT04 B2 (5v).
The LED driver PNM1 is used to power the backlight LEDs, it is controlled by the PWM controller MP3389EF (28). The keys of the ME15N10, SPP9527 (DIP-8) type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-22L1002UF TV is carried out by the K-L-NM1 power supply module, or its analogs using 1271A (8pin), OB5269CP microcircuits and WFF8N60 power switches.MainBoard - the main board (motherboard) is an MST6M181-T7S module, using CPU chips: MST16M181VS-LF-Z1, SPI FLASH: EN25P32, EEPROM: FM24C02A, FM24C04A, II6633E-P, SGM330, 1517P and others.
The F50CT-2DD-E (X) tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM215HT04-V
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.64x268.11 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 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: 10S3P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ROLSEN RL-22L1002UF TV with LCD LTM215HT04, 22 "(56 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 80000: 1 is achieved by special LED control. The LED panels of this TV are equipped with edge LED backlighting.The design and technical capabilities of the TV provide viewing of broadcasts and movies 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, NTSC Graphic processing and digital signal shaping takes place in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards Supported multimedia file formats: MP3, WMA, MPEG4, 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 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: without stand 535x394x36 mm.
TV weight: without stand: 5 kg.
Attention! Panel LTM215HT04 B2 (5v) LED TV ROLSEN RL-22L1002UF 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 flows down the glass onto the cables to make the TV unrepairable.