You can test resistors by lifting 1 leg. Not sure if they are carbon film or carbon comp. But either can fail. Testing of ceramic disk caps can be done with a cap tester or multimeter with a cap function, although this doesn't always identify a problem. Using another .022uf capacitor and jumpering it across the installed capacitor will correct the problem if the original is open, but not if it is leaky. This also appears to be the same problem all along, so I may suggest that you keep track on any parts replaced, and think of reinstalling the original 201 transistor if it made no change to the problem. Not fully required, but if you start replacing some resistors and caps, you want to keep the "number" of replaced parts down to a minimum.
Why don't you get cheap replacements locally for R201 to R205, and C201 and C202, so that you can substitute them one at a time if necessary.
there are some local ebay sellers that for just a few dollars can supply you what you need, many times with free shipping.