YOU SAID:
he went to the bank to deposit a check
INTO JAPANESE
彼は銀行に小切手を預けに行きました
BACK INTO ENGLISH
He went to the bank to deposit checks
INTO JAPANESE
彼は小切手を預けるために銀行に行きました
BACK INTO ENGLISH
He went to the bank to deposit the check
INTO JAPANESE
彼は小切手を預金するために銀行に行きました
BACK INTO ENGLISH
He went to the bank to deposit the check
That didn't even make that much sense in English.