Technical description and composition of the ROLSEN RL-22L1005UF TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-22L1005UF
Chassis / Version: MST6M182
Panel: 22 inch
Power Supply (PSU): MP113_QL
MainBoard: AS-MST6M182VG-LE2
IC MainBoard: SPI Flash: 25Q32B
Tuner: ET-6N1E-CF10
RL-22L1005UF Specifications
ROLSEN RL-22L1005UF
General recommendations for TV LCD LED repair
Repair of the ROLSEN RL-22L1005UF TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. 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. Swollen electrolytic or metal-ceramic capacitors, charred resistors, ring cracks in the soldering of the element terminals - all this can significantly help the master to determine the causes and consequences of the malfunctions in the TV.
In cases where the ROLSEN RL-22L1005UF TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light or blink, and there are no sounds and no signs of operability when turned on, the MP113_QL power supply module is most likely faulty or missing powering the processor on the motherboard (a typical defect of some ROLSEN TV models). Diagnostics and repair of the common power supply should always begin with checking the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse breaks, it is advisable to check for breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the mains rectifier, as well as the large electrolytic capacitor of the mains rectifier filter.
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 ROLSEN RL-22L1005UF TV does not have a picture, but there is sound, a malfunction is likely in the LED backlight circuits of the panel. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overestimated ESR.
To check the health of the LEDs and contact connections in their power supply circuit, it is necessary to disassemble the panel.
It should be remembered that it is not possible to determine an open circuit in the LED lines without disassembling the panels using a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
If the AS-MST6M182VG-LE2 motherboard is faulty, first of all, you need to check all the linear stabilizers or power converters of its chips, and also, if necessary, update the software. Sometimes it is possible to check the health of the MB only by replacing it.
If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - SPI Flash: 25Q32B. Defective components must be replaced.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the varicaps of the ET-6N1E-CF10 tuner, which is usually within 30-33V, as well as other supply voltages at the tuner outputs.
We remind users again! Attempts to self-repair the ROLSEN RL-22L1005UF TV without the appropriate qualifications and experience can lead to its complete non-repairability!
The MainBoard is shown in the figure below:AS-MST6M182VG-LE2
AS-MST6M182VG-LE2 can be used in TVs:
AKAI LEA-19L14G (Panel V185B1-LE1 M), ROLSEN RL-22L1005UF (Panel 22 inches).
The main features of the ROLSEN RL-22L1005UF device:
Installed matrix (LED-panel) 22 inches.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-22L1005UF TV is carried out by the MP113_QL power module, or its analogs.
MainBoard - the main board (motherboard) is an AS-MST6M182VG-LE2 module, using SPI Flash chips: 25Q32B and others.
Tuner ET-6N1E-CF10 provides reception of television programs and tuning to channels.
ROLSEN RL-22L1005UF TV with LCD LM215WF4, 22 "(56 cm) diagonal, 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 120,000: 1 is achieved by special LED control. 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 takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 6 W (2x3 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
An external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, 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 45 watts.
TV weight: 4 kg.
Attention! The LM215WF4 panel of the ROLSEN RL-22L1005UF 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.