Quote:
Originally Posted by spokenward
Preface:
I am working on an archival project with some borrowed and some ebay-ed player decks.
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Hi,
I bought a Panasonic AG-8700 - a nice PAL model with TBC, and has the exact same problem.
Got it for less than $70 because of this problem so I'm not complaining :-)
First I downloaded a free service manual, it also had a user manual in it so all functions and menus where explained. I tried to follow the diagram and diagnose the issue with an oscilloscope, but found out that many capacitors where defective. replacing a capacitor got me one step further on the path of the signal but then the next step was bad as well.
I had to change ALL the capacitors on the Video boards. It took about two days of work but it was worth it.
it was easier than trying to diagnose - So maybe half the capacitors I changes where actually OK... but it was just easier to take the board, remove 10 capacitors, install new ones and continue to the next 10. I replaced 100-200 capacitors. lost count somewhere after 50 :-)
The Audio boards and the servo boards are OK - they use a different kind of capacitors.
the boards I had to fix where two Y/C boards and two TBC boards.
Good luck...