Service Revenue is credit in nature because it is an income.
Revenues has credit balance as default balance and as services revenue is also a revenue account it means it should have credit balance as well and not a debit balance.
debit account receivable credit service revenue
A service revenue that is billed but not paid is an account receivable. Account receivables are assets and therefore you would "debit" the account.
Revenue is income or a credit.
Services revenue is also a revenue and like all revenue accounts which have credit balance as normal balance, services revenue also has a credit balance.
If you render a service n account to a customer you debit Account Receivable and credit Service Revenue.
debit
A credit
[Debit] Revenue receivable [Credit] Accrued revenue
Accounts Receivable - Debit Service Revenue - Credit
In the general journal, services related to unearned service revenue would typically be recorded as a debit to the Unearned Service Revenue account and a credit to the Service Revenue account. This entry reflects the recognition of revenue as the service has now been performed. For example, if $1,000 of unearned revenue is earned, the journal entry would be: Debit Unearned Service Revenue $1,000 and Credit Service Revenue $1,000. This entry indicates that the obligation to provide the service has been fulfilled.
When payment received without services: Debit Cash / bank Credit Unearned revenue When services rendered: Debit Unearned Revenue Credit Services revenue