Greetings group. I have a Panasonic ctv model TX-68X02A (MX10A chassis) with a random fault.
The onscreen display sometimes looses colour, everything displays in grey. At the same time, the tv station program and AV program picture seems to increase in brightness, but it still has colour. The brightness/contrast controls do not return the picture to normal.
One time, it did stop showing a off air picture completely.
When no station is tuned, the screen should be blue, but when the fault is present, the screen is grey.
The picture can sometimes also reduce in height. And at times, all the stations have been lost.
All caps have been tested with an ESR meter. I first suspected a dry joint, but vibration does not seem to have any effect.
I have a copy of the schematic. All settings in the "Market Mode" are o.k.
Can anyone please assist?
Thanks, Russell Griffiths.