GE AMX-II

GENERAL ELECTRIC MEDICAL SYSTEMS AMX-il X-RAY UNIT
10-377 SM A0654E
SEC. 9 COLLIMATOR LAMP CIRCUIT
Schematic reference Page 9, Chapter 7.
1. The collimator lamp circuit is initiated by pushing the collimator field light switch 451.
2 The collimator light receives its power in the sequence shown in Illustration 6-16.
100 MS
451 DELAY > ЗК! … 60 HZ
3A4K36 | (75,E) _06 B) © INVERTER—» 8T1
(74-E) (74,E) (30,C)
3A4K8 GO HZ 4DS1
(75,0) — INVERTER COLLIMATOR
DRIVER LIGHT (31,C)
ILLUSTRATION 6-16
3. Relay 8K1 (32,F) has four contacts functioning in the circuit.
a 8K1-4,5 (29-C) completes the circuit for the collimator transformer primary (8T1).
b. 8K1-4,6 (25,D) allows exposure by closing the circuit for relay 1K1. Relay 1K1 applies battery
power to the 500 Hz inverter.
d. 8K1-7,9 (25,D) allows rotation of the tube rotor when collimator light switch is on by closing
the stator circuit and opening the field lite circuit.
e. 8K1-5,6 (74,E) energizes 3A4K36 in the sequence shown in Illustration 6-16.
4. 4S1isadashpot type switch. When the switch is pushed, a piston forces air out of the cylinder
through a one-way valve. The piston is slowly returned by a spring and by air re-entering the cyl-
inder through an adjustable orifice. The time required to return determines the duration of 4DS1.
4S1 on G2 style collimators is an electronic type switch. When the switch is pushed, an electronic
timer controls internal contacts which control light duration.
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