Technical description and composition of the ROLSEN RL-24L1004F TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-24L1004F
Chassis / Version: RSAG7.820
Panel: V236H1-LE4 Rev. C1
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9998GN (24)
MOSFET LED driver: AOD444
Power Supply (PSU): RSAG7.820.2256 / ROH VER.D
PWM Power: NCP1271A (7)
MainBoard: RSAG7.820.2280 / ROH
IC MainBoard: CPU: MT8223LFM, Sound: CD1517CP, SPI FLASH: MX25L1606E
Tuner: HFT2-8C6 / V116H
Control: ER-31607R
RL-24L1004F Specifications
ROLSEN RL-24L1004F
General recommendations for TV LCD LED repair
Fault diagnosis and repair of ROLSEN RL-24L1004F, like other electronic devices, is recommended to begin with an external examination of external and internal elements. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. 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-24L1004F 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 failure is failure of the common power supply module RSAG7.820.2256 / ROH VER.D. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When diagnosing and repairing the power supply, first of all, you should replace the swollen capacitors of the secondary rectifier filter and check the fuse and, if it is broken, you must identify the cause. Often in such cases an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes and transistors in the primary circuit.
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 dried electrolytic capacitors or broken resistors in the primary circuit, or the 1271A PWM controller microcircuit itself may be faulty (7). It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the ROLSEN RL-24L1004F TV has no picture, but there is sound, a malfunction is likely in the LED backlight circuits of the V236H1 LE4 Rev.C1 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.
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.
On the RSAG7.820.2280 / ROH motherboard, in the event of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Often the MB (SSB) board needs to be replaced in the event of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - CPU: MT8223LFM, Sound: CD1517CP, SPI FLASH: MX25L1606E and replace the failed chips with new ones. Some malfunctions may be associated with the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If you suspect a malfunction of the HFT2-8C6 / V116H tuner, first of all, you need to make sure that there is a supply voltage of the varicaps (30-33V) at the corresponding output of the tuner, as well as other voltages supplying it.
Owners and users of the ROLSEN RL-24L1004F TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of the MainBoard T.VST29.A2B_12313 is shown in the figure below:T.VST29.A2B_12313
T.VST29.A2B_12313 can be used in TVs:
DNS E19A00 (Panel CX185LEDM (V185B1-PE)), DNS E22A11 (Panel M215HGE-P02), DNS E22A00 (Panel CX215LEDM M215HGE-P01), DNS E16A20 (Panel TL156WH4 (TL)(N2)), ERISSON 24LEB15 (Panel M240HW01 VD), ROLSEN RL-19L1003U (Panel M185BGE-L10 Rev.C1), ROLSEN RL-22L1003U (Panel V216BG1-LE1 REV C1), ROLSEN RL-23L1003UF (Panel M230HGE-L20 Rev.C1), ROLSEN RL-23L1005UF (Panel M230HGE-L20 RevC1).
External view of the power supply
The main features of the ROLSEN RL-24L1004F device:
Installed matrix (LED panel) V236H1-LE4 Rev. C1.
To power the backlight LEDs, a converter combined with a power supply is used, controlled by an OZ9998GN PWM controller (24). The keys of the AOD444 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-24L1004F TV is carried out by the RSAG7.820.2256 power module, or its analogs using NCP1271A microcircuits (7).
MainBoard - the main board (motherboard) is an RSAG7.820.2280 module using CPU chips: MT8223LFM, Sound: CD1517CP, SPI FLASH: MX25L1606E and others.
The HFT2-8C6 / V116H tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CHIMEI INNOLUX
Model: V236H1-LE4
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.6 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 521.28x293.22 mm
Surface: Antiglare (Haze 25%)
Brightness: 280 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 9S8P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ROLSEN RL-24L1004F TV with LCD V236H1-LE4, 24 "(61 cm) diagonal, 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 control of LED operation .The technology of manufacturing the screen of this TV model is realized with LED backlight. 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). The input high-frequency or video signal can be processed in analog systems PAL, SECAM Graphic processing and digital signal shaping takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats: MP3, WMA, JPEG.
The power of the acoustic system of sound 4 W (2x2 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, 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.
The power consumed by the TV in operating mode from the network is 30 W.
Dimensions: with stand 564x422x181 mm, without stand 564x381x52 mm.
TV weight: 4.6 kg.
Attention! Panel V236H1-LE4 Rev. C1 of LED TV ROLSEN RL-24L1004F 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.