Technical description and composition of the ROLSEN RL-16L12 TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-16L12
Chassis / Version: HK-T.MST29V03
Panel: LP156WH4 (TL) (R1) // LTN156AT17
T-CON: TPS61189, DA1218
LED driver (backlight): in conjunction with T-CON on glass
PWM LED driver: TPS61189, DA1218
Trans LED driver: 100
Power Supply (PSU): adapter ADP005-120250 12v 2.5a
MainBoard: HK-T.MST29V03
IC MainBoard: TSUMV29LU,
RL-16L12 specifications
ROLSEN RL-16L12
General recommendations for TV LCD LED repair
Repair and diagnostics of any electronic device, in particular ROLSEN RL-16L12, it is advisable to begin with a careful external examination of the 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 the necessary measurements are taken, which will 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.
Sometimes the ROLSEN RL-16L12 TV simply does not turn on. No control lamps on the front panel are on or blinking, the TV does not respond to the remote control and does not emit any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the general power supply adapter ADP005-120250 12v 2.5a. If it works, check the processor batteries on the SSB (Main Board). 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 (s) of the converter.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur without reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as broken resistors or punctured semiconductor elements in the stabilization circuits. Possible defect of the PWM chip from the manufacturer.
In cases where the ROLSEN RL-16L12 TV has lost the image, but there is sound and all other functions are operational, there is a possibility of a malfunction of the LED driver (the converter for supplying the LP156WH4 (TL) (R1) panel backlight LEDs). When you turn on the TV, the image may appear briefly and immediately disappear. It should be borne in mind that with such manifestations, the LEDs themselves fail.
Disassembling the panel is necessary to check the health of the LEDs and contact connections in their power supply circuit
It is impossible to check the LED bars for a break without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally a current source.
If the motherboard HK-T.MST29V03 KD-12050032-A04534 LTN156AT17 is faulty, first of all it is necessary to check all 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.
Repair of the board and replacement of TSUMV29LU microcircuits are carried out if the necessary equipment and the corresponding element base are available. Malfunctions associated with the use of BGA soldering technologies can be localized by the warm-up method.
Attention! Users and owners of RL-16L12 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.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> ROLSEN RL-16L12, Main: MST29V03, Panel: LTN156AT20
The main features of the ROLSEN RL-16L12 device:Installed matrix (LED panel) LP156WH4 (TL) (R1) or LTN156AT17.
Matrix control uses the TPS61189 Timing Controller (T-CON).
To power the backlight LEDs, the LED driver is used together, controlled by the PWM controller TPS61189, DA1218 A transformer 100 is installed in the LED driver converter.
To power all internal nodes of the ROLSEN RL-16L12 TV, an external source such as adapter ADP005-120250 12v 2.5a is used.
MainBoard - the main board (motherboard) is a HK-T.MST29V03 module, using TSUMV29LU microcircuits, and others.
Additional technical information about the panel:
Brand: LG Display
Model: LP156WH4-TLR1 61 Compatible model
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Surface: Antiglare
Brightness: 200 cd / m²
Contrast Ratio: 300: 1 (Min.)
Display Colors: 262K (6-bit), CIE1931 60%
Response Time: 16 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 strings WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 6-bit), 40 pins
Voltage: 3.3V
ROLSEN RL-16L12 TV with LCD LP156WH4, diagonal size 16 "(41 cm) 16: 9 format. The required screen brightness of 250 cd / m2 is provided by LED backlighting. Dynamic contrast ratio of 50,000: 1 is achieved by a special control of LED operation. The LED panels of this TV are 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, NTSC Graphic processing and digital signal shaping takes place in the 480i, 480p, 576i, 576p, 720p, 1080i standards.
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 30 watts.
Overall dimensions: 410x315x130 mm.
TV weight: 2 kg.
Attention! Panel LP156WH4 (TL) (R1) LED TV ROLSEN RL-16L12 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.