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From the archive read that the firmware rule in service is still needed. Looked for Rolsona options exhibited the same, is not appropriate. Who faced with such a problem, what options need for sound.
All attempts to adjustments in the service did not give the desired result. Came out a little crooked repair. Removed MICRA TDA7449, telly normally works, sound nominally regulated.


Log into the service menu


Ingredients: microprocessor CH08T0605 8827CSNG5DK0, all that scrawled on it. CH-1 chassis.
service menu D.
Setting adjustments plant.
1. connect the TV service menu is being implemented with the help of the native console.
2. To enter the service menu on the unit to put the volume to zero. On the remote control to press the MUTE button and holding it, push the button on the TV MENU. TV will fit into the service menu D.


Login to the service menu of the device

Changhong PF29D99


After a couple years of work happened lowering the value of the raster by one centimeter on each side and vertically. All that is familiar on television and wrote the title theme, it is still under warranty, dissect, respectively, is prohibited.
The sound on zero, then holding the MUTE button on the remote control by pushing the MENU button on the panel.
After pressing this combination in the top center of the screen there is a S and nothing else.
After the occurrence of S on the remote press CAL and get into the service menu.



Chassis PAXX0081

LC863548B (36pin), memory 24C16, the control chip SC7461-103,
LA76810A + LA7642N, CD2611, LA78040, TDKS: BSC24-09G.
Entering the SERVIS - on the panel down the volume to zero, holding, DISP Press (rectangle with a plus) on the remote.
A small clarification:

  • Chassis, which it is, most likely, SKYWORTH developed (china).

It first appeared under such brand, although, of course, other options are probable.
We SKYWORTH, like, the second letter in the chassis - is the foundation on which the chip is made chassis

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