Jangan-jangan tata suaranya belum diperiksa.

Jangan-jangan is an expression of suspicion, worry, or uneasy guesswork. It often means something like:

• what if
• maybe
• I’m afraid that perhaps
• could it be that...

In this sentence, it suggests the speaker is worried that the audio/sound setup may not have been checked yet.

So it is not a plain factual statement. It adds a feeling of uncertainty and concern.

No. Even though jangan by itself usually means don’t in a command, jangan-jangan is a fixed expression with a different meaning.

So:

• jangan = don’t
  
  • example: Jangan pergi. = Don’t go.
• jangan-jangan = maybe / what if / I’m afraid that perhaps

This is a case where repetition creates an idiomatic expression, not a literal doubling of the original meaning.

Tata suara is a noun phrase related to sound or audio arrangement. Depending on context, it can mean things like:

• sound system
• audio setup
• sound arrangement
• sound engineering / sound department

In everyday context, a learner will often understand it as the sound system or the audio setup.

A useful point:

• tata often has the sense of arrangement, organization, or layout
• suara = sound / voice

So together, tata suara refers to the arrangement or handling of sound.

The suffix -nya can do a few different jobs in Indonesian, and here it most likely makes the noun phrase more definite.

So tata suaranya can mean something like:

• the sound system
• its sound system
• his/her sound system
• the audio setup in question

In many sentences like this, -nya is best understood as making the noun specific, similar to the in English, even though it can also be possessive in other contexts.

So in this sentence, tata suaranya probably means the sound system / the audio setup being discussed.

This is a very important distinction.

• tidak diperiksa = not checked / was not checked
• belum diperiksa = not checked yet

Belum implies that the action is expected or still possible later. It has a not yet meaning.

So:

• Tata suaranya tidak diperiksa = the sound system was not checked / is not checked
• Tata suaranya belum diperiksa = the sound system has not been checked yet

In your sentence, belum is the natural choice because the speaker seems to be worrying that the checking has not happened yet.

Because the sentence is using the passive voice.

• memeriksa = to check / examine something
  This is active and focuses on the doer.
• diperiksa = to be checked / examined
  This is passive and focuses on the thing receiving the action.

Here, the topic is tata suaranya — the sound system/audio setup. Since that is the thing being checked, Indonesian naturally uses the passive:

• Tata suaranya belum diperiksa. = The sound system hasn’t been checked yet.

If you used the active, you would need a subject who does the checking, for example:

• Mereka belum memeriksa tata suaranya. = They haven’t checked the sound system yet.

Indonesian often leaves the agent unstated when it is unknown, obvious, or unimportant.

So belum diperiksa simply tells us that the checking has not happened yet, without saying who was supposed to do it.

This is very natural in Indonesian, especially in passive sentences. English does this too:

• The sound system hasn’t been checked yet.

That sentence also leaves out the person responsible.

If needed, Indonesian can add the agent, but it often doesn’t.

Indonesian verbs do not change form for tense the way English verbs do.

So diperiksa itself does not mean specifically:

• checked
• is checked
• was checked
• has been checked

The time reference comes from context and words like belum.

Because of belum, the sentence is understood as something like:

• hasn’t been checked yet
• is not checked yet

In natural English, hasn’t been checked yet is usually the best translation.

Yes, you can, but it changes the feel slightly.

• tata suara belum diperiksa = sound system / audio setup hasn’t been checked yet
  This can sound more general or less anchored to a specific one.
• tata suaranya belum diperiksa = the sound system / its sound system hasn’t been checked yet
  This sounds more definite and tied to a known situation.

So -nya helps point to the particular sound setup being discussed.

Yes, the given word order is natural and standard.

• Jangan-jangan tata suaranya belum diperiksa.

This follows a common pattern:

• discourse marker: jangan-jangan
• topic/subject: tata suaranya
• predicate: belum diperiksa

You might hear other word orders in special contexts, but this version is straightforward and natural for everyday Indonesian.

For a learner, this is a good model to remember: [suspicion marker] + [thing] + [belum + passive verb]

Periksa / diperiksa can cover a range from a quick check to a more careful inspection, depending on context.

It can mean:

• checked
• examined
• inspected

In this sentence, it most likely just means that the sound system has not been checked/tested yet, not necessarily that there was a deep formal inspection.

So the exact English wording depends on the situation, but checked is usually the most natural choice here.