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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Monday, 13 April 2020

REPAIR / SERVICING TV ERISSON 15LM01

Technical description and composition of the ERISSON 15LM01 TV, panel type and applicable modules. The composition of the modules.
ERISSON
Model: 15LM01
Chassis / Version: PA20154
Panel: LC151V02
Inverter (backlight): 12V, 2 LAMP, 1 TRANS
PWM Inverter: TL494L
MOSFET Inverter: STM8306
Power Supply (PSU): Adapter 12V
MainBoard: PA20154 ---- 5
IC MainBoard: TDA15063H / N1C00, TSU36AWVJ-LF-1, 24C16, AN17825A
Tuner: TDQ-6F6 / W126D
Specifications 15LM01
ERISSON 15LM01
General recommendations for repairing TV LCD
Possible malfunctions
- ERISSON 15LS01 does not turn on and does not show any signs of operability at all. Does not blink indicators and does not respond to control buttons.
Failure in such cases should begin to look in the adapter power supply circuits.
This model of TV is equipped with an external power adapter adapter type 12V, which the owner can purchase independently, and repairing it may not always be advisable, however, sometimes it makes sense to open it and eliminate simple typical defects typical of IPS. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns of semiconductors in secondary circuits, the converter can usually operate abnormally in short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn it on and immediately disappears
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
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 indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the PA20154 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).
Before changing the tuner TDQ-6F6 / W126D, 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 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 repair the TV ERISSON 15LS01 on its own without the appropriate qualifications and necessary experience can lead to its complete unrepairability!
SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    ERISSON 15LM01 Chassis PA20154----5TG
 The appearance of MainBoard PA20154 is shown in the figure below:
PA20154
PA20154 can be used in TVs:
ERISSON 15LM03 (Panel SVA150XG04TB), ERISSON 15LM01 (Panel LC151V02), ERISSON 15LM02 (Panel 1024x768 4:3), HYUNDAI H-LCD1502 (Panel SVA150XG04TB).
Main features of the ERISSON 15LM01 device:
Installed matrix (LCD panel) LC151V02.
A 12V inverter is used to power the backlight, controlled by a TL494L PWM controller. As power elements of the inverter, keys of the STM8306 type are used.
To power all the internal components of the ERISSON 15LM01 TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is a PA20154 module, using TDA15063H / N1C00, TSU36AWVJ-LF-1, 24C16, AN17825A, and others.
The TDQ-6F6 / W126D tuner provides TV reception and channel tuning.
Posted By: FRANK at 05:47
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