syuurikanryouyoteibi wo kakuninsi, daitaiki wo kari, syuurihin wo uketorimasita.

It is a compound noun:

• 修理 = repair
• 完了 = completion
• 予定日 = scheduled date / expected date

So 修理完了予定日 means the scheduled date for the repair to be completed or the expected repair completion date.

Japanese often stacks nouns together like this, so long expressions can look dense at first.

Because each noun phrase is the direct object of its verb:

• 修理完了予定日を確認し = checked the expected repair completion date
• 代替機を借り = borrowed a replacement device
• 修理品を受け取りました = received/picked up the repaired item

In English, we might not notice this pattern as clearly, but in Japanese, each action keeps its own object marker.

This is a very common Japanese pattern for listing actions in sequence.

Only the final verb carries the full tense and politeness marking:

• 確認し
• 借り
• 受け取りました

This means something like:

• I checked ...
• borrowed ...
• and received ...

The earlier verbs are in a connective form, and the last verb finishes the sentence. This avoids repetition and sounds natural.

If you said:

• 確認しました、借りました、受け取りました

it would sound more repetitive and less smooth.

It is the masu-stem of 確認する used as a connective form.

• dictionary form: 確認する
• polite form: 確認します
• connective form here: 確認し

This し links the action to the next one, like and checked.

This is similar in function to 確認して, but slightly more formal or written in feel.

For the same reason as 確認し: it is linking to the next action.

• dictionary form: 借りる
• polite form: 借ります
• connective form here: 借り

So:

• 代替機を借り、修理品を受け取りました。

means borrowed a replacement unit, and received the repaired item.

Only the final verb, 受け取りました, shows the tense/politeness for the whole sequence.

Yes. A very natural alternative is:

• 修理完了予定日を確認して、代替機を借りて、修理品を受け取りました。

This means basically the same thing.

The version in your sentence:

• 確認し、借り、受け取りました

sounds a bit more concise, formal, and report-like.

The て-form version sounds a little more conversational and straightforward.

代替機 means a replacement device/unit.

In repair or customer service contexts, it usually refers to a loaner device given while your own item is being repaired.

Examples:

• a loaner phone
• a temporary replacement laptop
• a substitute machine

So 代替機を借り means borrowed a loaner/replacement device.

Literally, 修理品 means the item related to repair.

Depending on context, it can mean:

• the item being repaired
• the repaired item

In this sentence, because it says 受け取りました (received/picked up), the most natural interpretation is:

• the repaired item
• or the item that had been sent in for repair

So here it means the item that was returned after repair.

The subject is omitted, which is very normal in Japanese.

The sentence does not explicitly say:

• I
• we
• the customer

Japanese often leaves out the subject when it is understood from context.

So depending on the situation, it could mean:

• I checked..., borrowed..., and received...
• The customer checked..., borrowed..., and received...
• We checked..., borrowed..., and received...

In many real situations, context tells you who did it.

Yes, normally it does.

This sentence naturally reads as:

1. checked the expected repair completion date
2. borrowed a replacement device
3. received the repaired item

Japanese action chains like this usually present events in the order they happened.

It means more than just passively received in many contexts. It often has the nuance of:

• received
• picked up
• took possession of

In a repair/service context, 修理品を受け取りました often means the person picked up the repaired item from the shop or counter.

So received is correct, but picked up may feel more natural in English depending on the situation.

Yes, it sounds fairly formal and practical.

Reasons:

• use of Sino-Japanese vocabulary like 確認, 代替機, 修理品
• use of the polite ending ました
• use of the concise connective style 確認し、借り、...

It sounds like something you might see in:

• a customer service record
• a report
• a business email
• a service desk memo

It is not unnatural in speech, but it has a somewhat businesslike tone.

The commas separate the linked actions and make the sentence easier to read.

They work a bit like pauses in English:

• 修理完了予定日を確認し、代替機を借り、修理品を受け取りました。

Without the commas, the sentence would still be grammatical, but harder to read.

Japanese uses 、 to mark natural breaks, especially in longer sentences or lists of actions.