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.
Text excerpt from page 8 (click to view)
CHAPTER 3. FRAME HARNESS DIAGRAM
Side L
HARNESS (WITH DC JACK 2P)
LCD
From board to connector (direct connection) Harness (with connectors on both ends)
DC IN
CN5401 1 2
1 A
Harness (soldering on either end) INVERTER UNIT DOCKING STATION PCGA-PRV1
CN5001 2 1 100 99