The elco should be 22 uF (micro fahrad) with a minimum working voltage of 25 volt.

An elco with the value 100uF is to high of value !

It doesn't have to be a SMD-package; can be e normal elco
with can be get from an old electronic part

see my pictures here

7020 braucht ca. 2 Minuten bis zum Sync

suc6 with repair

Very simple.
Your 22 Khz elco is bad.
This is a very known problem of the 7020.
See my tip here

7020 braucht ca. 2 Minuten bis zum Sync

suc6 with repair

replace the 22 Khz elco

see foto's

the original SMD-elco can be replaced with a normal elco as shown is second foto.

To remove the SMD-elco, just use fetch it and rotate is getli 90 degress and than 180 degrees in reverse
Lift it gently up and desolder the loosened pins

suc6 with repair, or else send me an PM (I can read German, bt my writing is not optiman