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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Saturday 2 May 2020

REPAIR / SERVICING TV IZUMI TL15H102B

Technical description and composition of the IZUMI TL15H102B TV, type of panel and applicable modules. The composition of the modules.
Izumi
Model: TL15H102B
Chassis / Version: MST36-V1.2
Panel: M156NWR1 // BT156GW01
Inverter (backlight): integrated into PSU
PWM Inverter: OB33060P
MOSFET Inverter: ME4946
Power Supply (PSU): LCD035-15P1-1 // TL15H102B -15P4
MainBoard: MST36-V1.2 CVA 2010.01.05
IC MainBoard: TSUMV26KE-LF, SPI Flash: EN25F40, EEPROM: 24C32, Sound: TDA1517P
Tuner: CDT-3FP2I2-01
Technical Specifications TL15H102B
IZUMI TL15H102B
General recommendations for repairing TV LCD
It is advisable to start the repair of the IZUMI TL15H102B TV with an external examination of all its constituent elements, both internal electronic components and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain chance that the TL15H102B -15P4 power supply module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the IZUMI TL15H102B does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
When repairing the inverter, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
Repair or diagnostics of the motherboard MST36-V1.2 CVA 2010.01.05 must begin with a check of the power conditioners. If necessary, you should update the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - TSUMV26KE-LF TDA1517P which may require replacement with new ones.
Once again, remind users! Attempts to independently repair the IZUMI TL15H102B TV without the appropriate qualifications and experience can lead to its complete non-repairability!

Repair MainBoard
The appearance of the MainBoard MST36-V1.2 is shown in the figure below:
MST36-V1.2
MST36-V1.2 can be used in TVs:
ERISSON 24LJ10 (Panel V236H1-L01 ), ERISSON 15LJ30 (Panel LM156WH1), ERISSON 19LJ09 (Panel LM185WH1 (TL) (E6)), IZUMI TL15H102B (Panel M156NWR1), IZUMI TL19H213B (Panel LM185WH1 (TL)(FC)).
Main features of the IZUMI TL15H102B device:
Installed matrix (LCD panel) M156NWR1 or BT156GW01.
To power the backlight, a converter is used, combined with a power supply, controlled by the OB33060P PWM controller. As power elements of the inverter, keys of the type ME4946 are used.
The formation of the necessary supply voltages for all nodes of the IZUMI TL15H102B TV is carried out by the LCD035-15P1-1 power supply module, or its analogs.
MainBoard - the main board (motherboard) is an MST36-V1.2 module using TSUMV26KE-LF chips, SPI Flash: EN25F40, EEPROM: 24С32, Sound: TDA1517P and others.
The tuner CDT-3FP2I2-01 provides the reception of television programs and tuning to channels.
Posted By: FRANK at 06:23
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