That chassis often suffers from frame output ic problems.
So I suspect IC561. If you're lucky resoldering may solve it, as the part (TDA8175-3) is no longer manufactured and not easily obtainable anymore. Panasonic now supply a modification kit to overcome this,..which is a real 'Heath Robinson' affair.
Otherwise you could try...
http://www.cricklewoodelectronics.com/Cricklewood/customer/search.php?substring=tda8175
Cobweb, March 2007