These are usually easy without a schematic. We rarely had
one due to cost & wait time. Having a worker helps also.
As a general comment for all , almost all TV's are broken down in blocks.
Example is:
Power supply 800
IF 100
Vert 400
Hoz /HV 500
etc. etc
ALl parts with 400 numbers will be in the vert. So IC401, C408, R420
etc are vert related. This is an example & will vary among MFR's
73 Zeno
LFOD !