Canon A-1 Repair Manual page 60

(5) Micro pattern digital switch
Various kinds of information are input by digital
values. Therefore, digital switches, constructed
of a code plate and slide brush, are employed.
The code plate employs the usual 35
~m
thick copper
foil plated print board with gold-plated print
pattern. The mechanical durability is guaranteed
for one million operations.
(6) Mini connectors
In the A-I, small mini connectors are used between
circuit boards, especially in places where attaching/
det, a ching functions are desirable.
The following points are connected by mini connectors.
Wiring (12 conductors) connecting the display/
decoder driver flex to the main flexible circuit
board.
Wiring (5 conductors) connecting the lens maximum
aperture correction information input switch to
the main body.
The wiring from the AV, TV and self timer
information input switches (10 lines) on the right
side of the top deck 1s connected to the main
flexible circuit board near the top of the
pentaprism.
The problem of space prevents the use of ready-made
connectors for the above-mentioned connections.
Therefore, what is used is a connector utilizing
aligned patterns pressed together by rubber. This
method makes possible very compact connectors.
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