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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Tuesday, 21 April 2020

REPAIR / SERVICING TV DIGITAL DL-16JT89

Technical description and composition of the DIGITAL DL-16JT89 TV, panel type and applicable modules. The composition of the modules.
DIGITAL 1 LAMP CCFL
Model: DL-16JT89
Chassis / Version: RC719DU-F10
Panel: LTN156AT01
Inverter (backlight): 12V 1 LAMP CCFL
MainBoard: RC719DU-F10
IC MainBoard: TDA1517P, TDA9885TS, PT2314, EON25F40
Tuner: CDT-3FP212-30
Technical Specifications DL-16JT89
DIGITAL DL-16JT89
General repair instructions for TV LCD 1 LAMP CCFL
Possible malfunctions
- The DIGITAL DL-16JT89 TV does not turn on and does not show any signs of operability at all. There is no reaction to either the remote control or the front panel control buttons.
Often in such cases, the power module is faulty. It is necessary to verify the presence of secondary voltages and, if they are absent, check the power switches and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. The PWM chip can also cause a malfunction of the power switch of the converter and is checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the RC719DU-F10 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - TDA1517P, TDA9885TS, PT2314, EON25F40 which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before changing the tuner CDT-3FP212-30, if there is no possibility of tuning to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Once again, remind users! Attempts to self-repair a DIGITAL DL-16JT89 TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!



Diagonal of 16 inches, 16: 9, Resolution 1024x768, Support HD 720p, Brightness 500 cd / m2, Viewing angle 178 °
Repair MainBoard
The appearance of the MainBoard RC719DU-F10 is shown in the figure below:
RC719DU-F10
RC719DU-F10 can be used in TVs:
DIGITAL DL-16JT89 (Panel LTN156AT01), ERISSON 22LDJ08 (Panel LM220WE1), ERISSON 15LJ18 (Panel HT150X02-100).
Main features of the DIGITAL DL-16JT89 device:
Installed matrix (1 LAMP CCFL panel) LTN156AT01.
A 12V inverter is used to power the backlight LEDs.
The required supply voltage for all nodes of the TV DIGITAL DL-16JT89 provides a switching power supply.
MainBoard - the main board (motherboard) is an RC719DU-F10 module, using TDA1517P, TDA9885TS, PT2314, EON25F40 and other chips.
The tuner CDT-3FP212-30 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTN156AT01-W01
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.6 inch
Resolution: 1366x768, WXGA
Active Area: 344.232x193.536 mm
Shape Style: Wedge (PCBA Bent, Depth? 5.2mm)
Display Colors: 262K (6-bit)
Frequency: 60Hz
Lamp Type: 1 pcs CCFL
Signal Interface: LVDS (1 ch, 6-bit)
Posted By: FRANK at 07:08
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