The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
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Text excerpt from page 18 (click to view)
Logical judgment
What kind of defect ?
Y No display? Please follow the no display trouble shooting.
N Y vertical defect? Bar defect appeared? Please follow bar defect trouble shooting.
N Y Horizontal defect? N mal �discharge on screen? Y Please follow the mal discharge trouble shooting. Please follow the line defect trouble shooting. Line defect