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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 6 February 2019

PANASONIC VIERA - TH 32A400H - TH 42A410T - LED LCD TV – SERVICE MODE – HOTEL MODE – SMPS SCHEMATIC TNP4G572 - TNPA5916ED

Panasonic Viera - TH 32A400H - TH 42A410T - LED LCD TV – Service Mode – Hotel Mode – SMPS Schematic TNP4G572 - TNPA5916ED


Panasonic Viera - TH-32A400H TH-32A410H - HONG KONG – TH 42A410T THAILAND - How to enter Service Mode – Hotel Mode – Power LED Blinking -  Power Supply Circuit Diagram.
How to enter into Service Mode
While pressing [VOLUME (--)] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.


Contents of adjustment mode
> Value is shown as a hexadecimal number.
> Preset value differs depending on models.
> After entering the adjustment mode, take note of the value in each item before starting adjustment.
Service mode screen


Display of SOS History
SOS History (Number of LED blinking) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.  This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory
shipment setting].

Exit
Disconnect the AC cord from wall outlet.

Hotel Mode
Access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu:
While pressing [VOLUME (-)] button of the main unit,
press [AV] button of the remote control three times within 2 seconds. The Hotel mode setup menu is displayed.


To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet.

The self-check function to test the unit.
Checking the IIC bus lines
Power LED Blinking timing.

How to access. Self-check indication only
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.


Self-check indication and forced to factory shipment setting
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit - Disconnect the AC cord from wall outlet.

SMPS CIRCUIT DIAGRAM (Schematic) [TNP 4G572] Hong Kong



TNPA5916ED – Power board Schematic. TH 42A410T THAILAND


Power LED Blinking timing chart

Information of LED Flashing timing chart.
When an abnormality occurs, the protection circuit will operate and reset the unit to stand by mode. During this time, the defective block can be identified by the number of blinking times of the Power LED on the front panel of the unit.

BL_SOS - SOS from PANEL inverter - 1 Blink

TV_SOS - TCON power down – 3 Blinks


SOUND_SOS -SOS from audio AMP – 9 Blinks

LCD Panel test mode

To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.

To Enter

While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2 seconds.

To Exit; Disconnect AC plug from wall outlet.

To confirm

If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.

And then, judge by the following method.

Still abnormal picture is displayed: The cause must be in LCD Panel.

Normal picture is displayed: The cause must be in A board.

Remarks

The test pattern is created by the circuit in LCD Panel.

In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.

If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board
Posted By: FRANK at 06:52
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