Superb rendition. Drawings (schematics) complete and unabridged. I do a great deal of vintage audio restoration. Documentation is essential for successful repairs. I have found sources over the years that offer good documentation, but rarely all that is necessary. Owner's Manuals has filled that void with complete and legible documentation. They have narrowed my "favorites" to a more manageable collection. This Denon manual in particular contained the latest revisions level, and offered alterations favorable to updating the item. The Illustrated Parts Breakdown (IPB) was well enough detailed to simplify part symbols and physical locations. You will not be disappointed!
This was precisely what I was looking for. Complete and good quality!
Text excerpt from page 25 (click to view)
3.2.5 Signal processing section
Is the sound output from both channels (L, R)? YES Normal
NO
No sound from either channel. YES Is 9V present at IC101 pin (8)? YES
NO
Compare the L-ch and R-ch to locate the defective point. YES
NO
Check the vicinity of the Q981 audio power supply.
Is the audio signal (including sampling output NO components) output to IC801 pins 39 and 40 during playback YES Is the audio signal output at IC301 pins 1 and 32during playback? YES Check the muting circuit. NO
