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)
Remote control unit
OPEN/CLOSE
OPEN/CLOSE KEYS
N/P
MUTE KEY mute the sound temporarily
Digit keys
CLEAR
L/R AUDIO
Player operation keys
ENTER
PBC
VOLUME UP(+),DOWM(-) KEY Adjust the volume.
A-B
DVD-N9868
Battery installation for remote control Open the battery compartment lid and insert a pair of AAA batteries with correct polarity.