This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
I will use Owner-Manual.com for all my manual needs.
Regarding service information other than these sections, refer to the GR-DVL320U and GR-DVL720U service manual (No. 86658). Also, be sure to note important safety precautions provided in the service manual.
SPECIFICATIONS (The specifications shown pertain specifically to the model GR-DVL320, DVL520)