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.
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Text excerpt from page 11 (click to view)
SCHEMATIC DIAGRAMS
LINEAR (EV-510C/I/N)
Antenna 3 External Antenna Jack 1 4 Speaker 8 9 Earphone Jack
Tuner Tuning Voltage Generator Circuit Audio Amplifier Circuit IF Pad IF Detection Circuit 17
