Magnetic recording/reproducing apparatus

A magnetic recording/reproducing apparatus comprising:

• a rotary head cylinder carrying a magnetic head for reading/writing data on a magnetic tape;
• a main printed circuit board on which at least a part of a circuit for processing signals from said magnetic head is provided;
• a frame on which said main printed circuit board is fixed;
• a chassis on which said rotary head cylinder, a supply reel table, a take-up reel table, and at least one motor for driving said cylinder, said supply reel table, and said take-up reel table are mounted;
• a second printed circuit board electrically connected to said driving motor and said magnetic head and fixed to one side edge of said chassis;
• and
• a hinge mechanism for providing an electrical connection between said main printed circuit board and said second printed circuit board, said hinge mechanism including a first hinge member attached to said main printed circuit board and a second hinge member attached to said second printed circuit board, said first and second hinge members being detachably engaged with each other and permitting said chassis to pivot between a first position in which said chassis contacts said main printed circuit board at a part of a bottom of said chassis which is parallel to said main printed circuit board and a second position in which the chassis is spaced apart from the main printed circuit board to project out from the frame.