REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Thursday 20 August 2020

REPAIRING / SERVICING TV ROLSEN RL-32A03105U

Technical description and composition of the ROLSEN RL-32A03105U TV, panel type and modules used. The composition of the modules.
ROLSEN
Model: RL-32A03105U
Chassis / Version: RSAG7.820
Panel: LTA320AP02
T-CON: 320AP03C2LV0.1
Power Supply (PSU): HLP45B01
MainBoard: RSAG7.820.1637
IC MainBoard: MT8222ARSU, TDA9886TS, MX25L3206EM, FT24C16.
Tuner: TDQ-6FT / W126H
Appearance
ROLSEN RL-32A03105U
General recommendations for TV LCD repair
Repair of a ROLSEN TV with RSAG7.820 chassis should begin with a careful external examination of all its constituent elements and modules. Many visible changes in the state of elements make it possible to determine the further direction of troubleshooting and localization of the defect. If charred resistors, swollen electrolytic or sintered capacitors, ring cracks in the soldering of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction, as well as to check the connected elements and assemblies.
In the absence of any signs of operability, when the ROLSEN RL-32A03105U does not turn on and does not signal anything with the control lamps on the panel, there is a possibility of a malfunction of the HLP45B01 TV power module. The power supply regulator of the control processor on the motherboard may also be faulty with the same manifestations. In general, first of all, it is necessary to check the electrolytic capacitors of the filters of the secondary rectifiers and the fuse at the mains input. If it is cut off, then the diodes of the rectifier bridge and the key transistor of the converter, which can be located either on a separate heatsink or integrated with a PWM controller into a common microcircuit, should be checked for a breakdown of PN junctions. Options are possible.
The reasons for the breakdown of the power switch in switching power supplies (SMPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of a PWM regulator microcircuit or breaks in resistors in its strapping.
If the ROLSEN RL-32A03105U has no image, but there is sound, there is a possibility of a malfunction of the backlight lamps or their power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are in good working order. When disabling protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all standard protection circuits must be restored.
In cases of attempts to repair the motherboard RSAG7.820.1637, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating. In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MT8222ARSU, TDA9886TS, MX25L3206EM, FT24C16. to new or known serviceable ones. In cases where BGA technologies are used, defects are usually localized by heating.
Attention to the owners! Attempts to repair the ROLSEN RL-32A03105U TV on your own are not recommended by the manufacturer and can lead to serious negative consequences!
https://3.bp.blogspot.com/-wvbPwWf0aOA/XzaVaFLiwMI/AAAAAAABDxw/p7MLCLBTDlIXAzPfLJHNjTNzKedTMFpfQCK4BGAYYCw/s1600/RSAG7.820.1637_DCE.jpgAdditional MainBoard Repair
The appearance of the MainBoard RSAG7.820.1637 is shown in the figure below:
RSAG7.820.1637
RSAG7.820.1637 can be used in TVs:
BBK LT3218SU (Panel LTA320AP02 S07), BBK LT3218SU (Panel LTA320AP02), ROLSEN RL-32A03105U (Panel LTA320AP02), ROLSEN RL-32A09105F (Panel LC320WUN (SA)(B4)), ROLSEN RL-32A09105U (Panel LTA320AP05).
The main features of the ROLSEN RL-32A03105U device:
Installed matrix (LCD-panel) LTA320AP02.
Matrix control uses Timing Controller (T-CON) 320AP03C2LV0.1.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-32A03105U TV is carried out by the HLP45B01 power module, or its analogs.
MainBoard - the main board (motherboard) is an RSAG7.820.1637 module, using the MT8222ARSU, TDA9886TS, MX25L3206EM, FT24C16 microcircuits. and others.
The TDQ-6FT / W126H tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AP02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Posted By: FRANK at 05:55
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