Technical description and composition of the ROLSEN RL-39S1502T2C TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-39S1502T2C
Chassis / Version: TP.SIS231.PT851
Panel: V390BJ1-L01-D00
LED driver (backlight): integrated into MainBoard
PWM LED driver: OB3350CP
MOSFET LED driver: AOD4454
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.SIS231.PT851
IC MainBoard: CPU: SIS231, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2
RL-39S1502T2C Specifications
ROLSEN RL-39S1502T2C
General recommendations for TV LCD LED repair
If the power supply fails, which in this TV is combined with MainBoard TP.SIS231.PT851, external manifestations may be different, for example, ROLSEN RL-39S1502T2C does not turn on at all and there is no indication of the control lamps on the front panel. In the absence of swollen capacitors of the secondary rectifier filter, diagnostics of the power supply should begin with checking the fuse and, if it is broken, it is necessary first of all to check all power semiconductor elements of the primary circuit - diodes and transistors for the likelihood of an avalanche or thermal breakdown.
It should be remembered that in the practice of repair, usually power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the reason that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dry electrolytic capacitors or broken resistors in the primary circuit, or the PWM controller microcircuit itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If when you turn on the ROLSEN RL-39S1502T2C there is no image, or it appears and immediately disappears, but there is sound, most likely there is a malfunction in the V390BJ1-L01-D00 panel backlight LED circuit, or in the LED driver node - their power converter.
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 conclusions, as well as the reliability of the connections in the connectors and the ration of the connector pins.
When diagnosing, it must be borne in mind that it is impossible to check for an open in the circuit of the LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. By opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED if you connect the probes to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the SC.
In cases of attempts to repair the TP.SIS231.PT851 motherboard, it is necessary to check the performance of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed by local heating.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - SPI Flash 25Q64 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.
Remember! Attempts of self-repair by users of the ROLSEN RL-39S1502T2C TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Power supply Chassis TP.SIS231.PT85
The appearance of the MainBoard TP.SIS231.PT851 is shown in the figure below:TP.SIS231.PT851
TP.SIS231.PT851 can be used in TVs:
ERISSON 40LEP92 (Panel LSC400HN01 G01), ROLSEN RL-39S1502T2C (Panel V390BJ1-L01-D00), RUBIN RB-40D5FT2C (Panel 390HJ5-XCPE1).
Main features of the ROLSEN RL-39S1502T2C device:
Installed matrix (LED panel) V390BJ1-L01-D00.
To power the backlight LEDs, a converter combined with the main board TP.SIS231.PT851 is used, controlled by the OB3350CP PWM controller. AOD4454 type keys are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a TP.SIS231.PT851 module, using CPU: SIS231 chips, DRAM: NT5CB64M16FP-DH, SPI Flash: 25Q64, TPA3110LD2 and others.
ROLSEN RL-39S1502T2C TV with LCD V390BJ1-L01-D00, diagonal 39 "(99 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 300,000: 1 is achieved by special control The LCD panel of the TV is equipped with direct backlighting with rear-mounted LEDs - Direct LED.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the 720p (HD Ready) graphics standard.Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal formation is performed in 480i, 480p, 576i, 576p, 720p, 1080i standards Supported multimedia file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
Speaker power 13 W (2x6.5 W) is provided by two speakers. Uses NICAM stereo signal processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, VGA, HDMI x3, 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 digital tuner is capable of receiving TV channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 896x589x200 mm, without stand 896x543x90 mm.
TV weight: 8.7 kg.
Attention! The V390BJ1-L01-D00 panel of the ROLSEN RL-39S1502T2C LED TV is an expensive and unreliable element.
Do not allow any impacts 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.