Fisher pH 492 service and owners manual

Hello. I am new to this forum and tried searching for service manuals or owner's manuals for the ph 492 radio I just purchased. I waited years to find this radio and I'd like to learn how to take care of it and get it in good shape. Does anyone know where I might find these manuals for this particular area?

Check here: It's for a PH490 but the 490 is exact same except speakers and it's the model for Europe https://www.analogalley.com/osccart/product_info.php?products_id=1451&osCsid=1b5c8ac0b2587cb58f4bcab91252d849

Good luck with learning.