Filter caps common on both 9-160 & 9-181 sets. Caps
usually have lots of puss coming out & you can see it from
the top. It will be the biggest cap on the bottom board.
It may be a hoz or pin problem also.
For model # look on CRT for little tear off labels and on the
plastic frame & inside cabinet. The 9-*** module numbers
actually can help more...............
73 Zeno