TM 5-6675-319-14
(b) If the positive (+) switch on the MAG assembly is depressed, a low
is prsent on pin 6 of IC1. IC1 pin 10 ouput goes low turning on Q1. This ener-
gizes relay K1 .
K1 contacts apply L1 (115 V ac) to one side of K3, energizing it.
The output of the dc to dc converter is applied to TB2 pins Al and A2. The direc-
t i o n o f r o t a t i o n i s c o n t r o l l e d b y r e l a y K 3.
K3 feeds the armature supply from TB2 +
through its lower contacts to TB2 pin A1.
The dc outputs from TB2 pins Al and A2
are fed to chassis TB1 pins 8 and 9 to the dc motor armature. The dc motor turns
r i g h t i n c r e a s i n g i m a g e s i z e u n t i l t h e p o s i t i v e ( + ) s w i t c h i s r e l e a s e d o r t h e l i m i t
switch in the motor circuit opens. When the positive (+) switch is released, pin 6
and pin 10 of IC1 go high. This cuts off Q1 and de-energizes relays K1 and K3.
( 3 ) T i l t d r i v e .
( a ) T h e a x e s o f t i l t p a s s t h r o u g h t h e p l a n e o f t h e n e g a t i v e . T i lt
brackets are attached to the left and right column headers. Support bars, attached
to the brackets, extend vertically from the tilt brackets and provide guidance for
the inversors, easel, and easel arm pivot assemblies. The lower end of the support
bars are connected through sliding brackets to nuts on the tilt drive spindles
mounted in the base of the instrument.
The spindles provide tilt motion to the
support bars.
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