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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Text excerpt from page 4 (click to view)
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5. Flow system (schematic diagram): 51 Container with water. 42 Pump. Operates by means of a vibrating piston. 45 De-airing unit. Makes sure that the pump will really start to pump water when boiler and tubes are empty. 29 Boiler with element. 17 Steaming device. 10 Distribution unit. Allows to select between making coffee and producing steam. 12 Pressure unit. Maintains a continuous pressure in the boiler during steaming. 32 Flowmeter measures the amount of water by means of a blade wheel inside, to be used for programming the electronic control (see Direction for use). Note: Figures refer to items on the exploded view drawing
