How do I set up parental controls to lock channels or programmes?
Press Quick settings > Navigation keys up > Channel > Parental Controls and press OK, entering your PIN code if prompted. From this menu, you can lock individual channels by selecting Channel Blocked, restrict programmes by age rating under Programme Restrictions, or block input sources using Input Blocked. A 4-digit PIN code is required to unlock or watch any locked content. (Page 8)
From the official Sony WH-1000XM5 Wireless Noise-Canceling Headphones manual, page 8
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