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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 18 December 2019

REPAIRING / SERVICING TV TELEFUNKEN TF-LED32S23

TELEFUNKEN LED
Model: TF-LED32S23
Panel: LVW320CS0T E146 V1
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated in MainBoard: Voltage Driver = 78V
PWM LED driver: OB3350CP
Power supply (PSU): integrated into the MainBoard
PWM power: PWM SOT23-6 LD7536R
Main board: TP.MS18VG.P77 MS82PT
MainBoard IC: Flash: 25Q32B, Sound: TPA3110
Tuner: R620D
TELEFUNKEN TF-LED32S23
General Repair Instructions for LCD LCD TVs

Possible malfunctions
- The TELEFUNKEN TF-LED32S23 television does not turn on, does not respond to the remote control and the buttons on the control panel, does not turn on and does not flash.
The malfunction in such cases should be looked for in the elements of the power source - the network voltage converter (AC / DC), located on the main board MainBoard TP.MS18VG.P77. It is necessary to measure its output voltages and, in case of absence, to check the proper functioning of the power switches and rectification diodes in the converters in order to possible failures.
In the event of a failure of the secondary circuits, the converter can generally operate in short-circuit mode in an emergency, and during a short-circuit in the power elements of the primary circuit, the main fuse generally breaks.
Failures of the Mos-Fet keys used in pulsed sources are often caused by malfunctions of other elements, for example in the power supply circuit of a PWM controller, in circuits with frequency or damping adjustment, as well than in negative stabilization return. The PWM PWM SOT23-6 LD7536R chips are generally checked by replacing them with new ones or by working obviously.

- There is no picture, there is sound, it responds to the remote control, the channels are switched. In some cases, the image appears when you turn it on and immediately disappears.
In some cases, a malfunction is due to a lack of backlight. This can be due to both the power supply of the LEDs, their operating state (failure or breakage) and the violation of the contact connections of the LED strips.
To detect a break in the LED lines without dismantling the panel, a current source is necessary. It is impossible to open transitions connected in series with a simple multimeter, a voltage of several tens of volts is necessary.

- The television does not switch on, does not respond to the remote control. The LED flashes or signals standby mode.
Repairing or diagnosing the TP.MS18VG.P77 motherboard should start by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you must update or replace the software (software). Complex MB repair (SSB) is only possible under the conditions of a service center with the necessary equipment. Verification or replacement of Flash elements: 25Q32B, Sound: The TPA3110 requires the training and professional skills necessary to repair modules at the component level. Heating can sometimes diagnose problems related to the use of BGA brazing technologies.
Attention users! The independent repair of a TELEFUNKEN TF-LED32S23 television without the appropriate qualifications and the necessary experience may result in its total non-repairability!


The appearance of MainBoard TP.MS18VG.P77 is illustrated in the figure below:
TP.MS18VG.P77
TP.MS18VG.P77 can be used in televisions:
ERISSON 24LET35 (Panel LVW240CMOT E1 V2), ERISSON 19LET35 (Panel M185XTN01.3), FUSION FLTV-24C10 (Panel LVW230SSOT E1 V2), FUSION FLTV-32C10 (Panel LVW320CSOT E81 V7), HYUNDAI H-LED32V19 (Panel LVW320CSOT E45 V10), HYUNDAI H-LED32V23 (Panel LVW320C80T E64 V5), TCL 19T2100 (Panel M185XTN01.2), TELEFUNKEN TF-LED32S23 (Panel LVW320CS0T E146 V1), THOMSON 32B2600 (Panel LVW320C8OT EB1), THOMSON 28B2500 (Panel LVW280CSOT E13V1).
Main characteristics of the TELEFUNKEN TF-LED32S23 device:
Installed matrix (LED panel) LVW320CS0T E146 V1.
The matrix control uses the synchronization controller (T-CON) MT3151A05-5-XC-5.
To power the backlight LEDs, a converter is used, associated with the main board TP.MS18VG.P77, controlled by the OB3350CP PWM controller.
The power module is combined with the MainBoard and is designed according to a reverse feedback AC / DC voltage converter using PWM SOT23-6 LD7536R microcircuits.
Posted By: FRANK at 08:47
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