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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Wednesday 18 March 2020

REPAIR / SERVICING TV HAIER L19C10A

Technical description and composition of the HAIER L19C10A TV, type of panel and applicable modules. The composition of the modules.
HAIER
Model: L19C10A
Chassis / Version: QCX0608026 SVA150 XG04TB
Panel: LTM190EX-L21
Inverter (backlight): XAD354LR
PWM Inverter: MP1038EM
MOSFET Inverter: 4822 8 pin
Trans Inverter: 19LES-X81 0626X
MOSFET Power: P10NK60ZFP
IC MainBoard: TDA15021H / N1C00, SM5964, RTD2023B, TDA1517NE, MP1410ES
Tuner: TEDE9-2B4A
Control: VC532237
Specifications
HAIER L19C10A
General recommendations for repairing TV LCD
Possible malfunctions
- The HAIER L19C10A TV does not turn on, does not respond to the remote control and the control panel buttons, and does not blink with any indicators.
In most of these cases, the power supply is faulty. It is necessary to measure the secondary output voltage, and in case of their absence, check the operability of the power switches (P10NK60ZFP) of the converters 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 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.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuit should be restored immediately after the repair is completed.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips TDA15021H / N1C00, SM5964, RTD2023B, TDA1517NE, MP1410ES and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the TEDE9-2B4A tuner, if it is not possible to tune to television channels, make sure that there are supply voltages that need to be measured on the corresponding tuner pins and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
It should be remembered! Attempts to independently repair the HAIER L19C10A TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
FIRMWARE FOR SPI  FLASH ----------------->    Haier L19C10A , Main: , Panel: LTM190EX-L21


 Key Features of HAIER L19C10A:
Installed matrix (LCD panel) LTM190EX-L21.
To power the backlight, an XAD354LR inverter is used, it is controlled by the MP1038EM PWM controller. The transformer 19LES-X81 0626X is installed in the inverter converter. As power elements of the inverter, keys of the type 4822 8 pin are used.
The required supply voltage for all nodes of the HAIER L19C10A TV is provided by a switching power supply using power switches of the P10NK60ZFP type.
MainBoard - the main board (motherboard) includes TDA15021H / N1C00, SM5964, RTD2023B, TDA1517NE, MP1410ES and others.
The TEDE9-2B4A tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM190EX-L21
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1280x1024, SXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 376.32x301.056 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 700: 1
Display Colors: 16.7M, CIE1931 72%
Response Time: 1.7 / 6.3 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
Posted By: FRANK at 08:15
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