AKAI GXC-65D DOLBY SYSTEM ELECTRIC SCHEMATIC DIAGRAM

This Akai GXC-65D is a auto-reverse stereo cassette deck with Dolby B noise reduction, it was first sold by Akai in 1973 with a manufacturer suggested retail price of USD $350 and discontinued a year later. 

The main features of the Akai GXC-65D are: 2 heads, mechanical 3 digit tape counter, manual tape type selection and capable of handling normal and chrome tapes, belt driven single-capstan transport.
Typical of this deck is the 70's top loading layout with the cassette compartiment located on the center of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well.
Level meters used on the GXC-65D are analog needle VU reading meters. Mechanical transport controls for reliable GXC-65D transport function selection.
The Dolby-B system reduces tape hiss on tapes recorded on the GXC-65D by as much as 10 dB at the highest frequencies.
To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. For undisturbed listening a jack connector for a pair of stereo headphones is supplied. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable.