To actively check or inspect something oneself
When to use
Direct inspection, Active action, Responsible checking
The nuance
Use when the subject actively inspects or checks something. It is an active verb form.
점검하다 (jeom-geom-ha-da, jeomgeomhada) · 점검되다 (jeom-geom-doe-da, jeomgeomdoeda)
‘점검하다’ expresses active inspection by a subject, while ‘점검되다’ indicates that inspection happened passively or was done by someone else.

One lane per word — no nested boxes, just the gist.
To actively check or inspect something oneself
When to use
Direct inspection, Active action, Responsible checking
The nuance
Use when the subject actively inspects or checks something. It is an active verb form.
Indicates that inspection was done by someone (unspecified) or that the object is in an inspected state
When to use
Passive inspection, Inspection completed state, Unspecified inspector
The nuance
Use when the subject is unclear or when expressing that inspection has been completed. It is a passive verb form.
기계 상태를 점검하다.
gi-gye sang-tae-reul jeom-geom-ha-da., gi gye sang tae reul jeom geom ha da.
The subject actively inspects, so ‘점검하다’ is correct.
기계 상태가 점검되다.
gi-gye sang-tae-ga jeom-geom-doe-da., gi gye sang tae ga jeom geom doe da.
Passive form indicating inspection completed; ‘점검되다’ fits.
나는 점검되다.
na-neun jeom-geom-doe-da., na neun jeom geom doe da.
‘나는 점검되다’ is unnatural; usually used for objects, not people.
기술자가 장비를 점검하다.
gi-sul-ja-ga jang-bi-reul jeom-geom-ha-da., gi sul ja ga jang bi reul jeom geom ha da.
Clear subject actively inspecting; ‘점검하다’ is correct.
장비가 점검되었다.
jang-bi-ga jeom-geom-doe-eoss-da., jang bi ga jeom geom doe eoss da.
Passive expression of completed inspection; ‘점검되다’ fits.
점검되다 기계를 사용하다.
jeom-geom-doe-da gi-gye-reul sa-yong-ha-da., jeom geom doe da gi gye reul sa yong ha da.
‘점검되다’ describes inspected state; appropriate here.
점검하다 기계를 사용하다.
jeom-geom-ha-da gi-gye-reul sa-yong-ha-da., jeom geom ha da gi gye reul sa yong ha da.
‘점검하다’ is a verb, cannot modify noun like adjective.
나는 장비를 점검되다.
na-neun jang-bi-reul jeom-geom-doe-da., na neun jang bi reul jeom geom doe da.
Active subject cannot use passive verb with object; use ‘점검하다’.
Which word to use when a technician actively inspects equipment?
Which expression fits describing a machine confirmed inspected?
What expression to use when the inspector is unknown?