Technical description and composition of the ROLSEN RL-32L1005U-GR TV, panel type and modules used. The composition of the modules.ROLSEN LED
Model: RL-32L1005U-GR
Chassis / Version: MST6M182
Panel: HV32WX2-201 / D
LED driver (backlight): AY078D-4SF
PWM LED driver: OB3362RP
Power Supply (PSU): AY078D-4SF
PWM Power: LD7536R, (6pin LXP 36R)
MOSFET Power: K6A600
MainBoard: AS-MST6M182VG-LE1
IC MainBoard: MST6M182VG-LF-Z1, EN25Q32B-104HIP, PS331 (HDMI), CT3257A (RS232)
Tuner: ET-6N1E-CF101R
Appearance
ROLSEN RL-32L1005U-GR
General recommendations for TV LCD LED repair
Repair of the ROLSEN RL-32L1005U-GR TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Often, based on external signs and the nature of damage to elements, it becomes possible to draw some conclusions and determine a further algorithm for searching for a defect before taking the necessary measurements at control points. Ring cracks in the soldering of the terminals of the heating elements, swollen electrolytic capacitors, a charred layer of paint on the resistors - all this for the repairman can be a significant clue in assumptions about the causes and consequences of a malfunction.
Sometimes the ROLSEN RL-32L1005U-GR 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 a failure of the common power supply module AY078D-4SF. If it is working properly, you need to check the processor batteries on the SSB (Main Board). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. If it breaks, you should check the power elements of the K6A600 transistors and the rectifier bridge diodes for avalanche (thermal) breakdown.
In most cases, breakdowns of keys 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 dry 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 LD7536R, (6pin LXP 36R) from the manufacturer.
If, when ROLSEN RL-32L1005U-GR is turned on, there is no image, or it appears for a second and disappears, but there is sound, most likely a malfunction in the HV32WX2-201-D panel backlight LED circuit, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the common power supply.
It is often necessary to disassemble the panel to check the health of the LEDs, as well as the contact connections in the connectors and solders.
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.
On the AS-MST6M182VG-LE1 motherboard, in case of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In some cases, it is necessary to check or replace (if necessary) elements of the MB (SSB) board - MST6M182VG-LF-Z1, EN25Q32B-104HIP, PS331 (HDMI), CT3257A (RS232). In cases where a BGA processor is used, its malfunction is usually detected by a local warm-up method.
Before replacing the ET-6N1E-CF101R tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals, including the supply of varicaps (30-33V).
Owners and users of the ROLSEN RL-32L1005U-GR TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to the complete non-repairability of the device!
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> ROLSEN RL-32L1005U, Main: AS-MST6M182VG-LE1
The appearance of the MainBoard AS-MST6M182VG-LE1 is shown in the figure below:AS-MST6M182VG-LE1
AS-MST6M182VG-LE1 can be used in TVs:
ROLSEN RL-32L1003U (Panel HV320WX2-201-D), ROLSEN RL-32L1005U (Panel LC320EXN-SEA1), ROLSEN RL-32L1005U-GR (Panel HV32WX2-201 / D).
The main features of the ROLSEN RL-32L1005U-GR device:
Installed matrix (LED panel) HV32WX2-201 / D.
The LED driver AY078D-4SF is used to power the backlight LEDs, it is controlled by the OB3362RP PWM controller.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-32L1005U-GR TV is carried out by the AY078D-4SF power module, or its analogs using LD7536R microcircuits, (6pin LXP 36R) and power switches of the K6A600 type.
MainBoard - the main board (motherboard) is an AS-MST6M182VG-LE1 module, using MST6M182VG-LF-Z1, EN25Q32B-104HIP, PS331 (HDMI), CT3257A (RS232) and others.
Tuner ET-6N1E-CF101R provides reception of television programs and tuning to channels.
