Panasonic Quintrix F TC-21P50R help diagnosing the problem

[Sultanpepper]

Originally Posted by zeno

First off thank you for the good prep you did. Some tell you almost nothing.
This looks challenging especially without lots of equipment.
1) if you have an old game or VCR try that through the RF.
2) if you have no inputs hooked up is the OSD stable ?
3) try tapping ( with authority ) the set & see if that effects it.
4) if the manual has a block diagram ( not the schematic ) post that.
It shows the flow from stage to stage & is a BIG help on high end sets.
5) DO NOT go into the service menus at this time !!!
6) when you pull the back take a chassis picture. That helps us remember
a set.

Let us know what you find.

73 Zeno
LFOD !

First I'd like to apologise for parking this repair attempt due to work. Second I've borrowed an old VCR and connected it to the RF input and the screen is showing same distorted picture .... any clue what that might mean when all inputs give bad screen ?

For the voltages ( main ones ) 5V , 12V , 9V ,1.2V coming at the secondary sides after the voltage regulators they are working fine , turns out I needed to hookup the screen or something for the voltages to work properly; meaning the chassis will not give correct voltages on its own .

I changed the vertical IC just for kicks but it did nothing . Also I tried recapping around the voltage regulators and the vertical IC .

BR