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GENERAL
ELECTRIC
MEDICAL
SYSTEMS
AMX-il X-RAY UNIT
10-377
SECTION 11
SM A0654E
ADJUSTMENT OF MA STABILIZER
The filament and MA regulator circuits were initially adjusted during factory test. Readjustment on instal-
lation is reguired because of tolerance variations between individual controls, transformers, and tube units.
initial Conditions:
a.
Main circuit breaker and keyed switch OFF.
b.
Tube unit shielded and x-ray port blocked.
c.
H. V. Divider and five foot cables connected.
Instrumentation:
a.
Open x-ray control panel. Place 3A2 Board on
extender card.
Meter battery voltage:
Connect DVM (0-200
VDC) across 3TB1-27 (+) and 3TB1-5 (-).
Meter tube current:
Remove the jumper (with
banana plugs) from MA+ and MA- terminals
of panel 3. Connect 0-150 DCMA Meter
(+/-1/29 accuracy) to MA + and MA -.
Meter filament transformer primary voltage.
Connect 0-150 VAC iron vane meter across
3TB1-18 and 3TB1-12.
Connect oscilloscope to observe MA stabilizer
signal:
For 564 Scope
3J4-29
3781-13
34-23 24424
3
CHI. PROBE:
GND CLIP:
VERT.:
HORIZ.:
TRIG.:
TRIG:
CHI
GND CLIP
Top of 3A2C55 (+)
Bottom of 3A2C55(-)
0.2/DIV. x 10 Probe
20 MS/DIV
EXT, DC, + using trigger
circuit of Illustration 4-11-31
OR
INT, DC, T, SETPOINT
(trigger circuit, not necessary)
For 422 Scope
Top of 3A2C55 (+)
Bottom of 3A2C55 (-)
p-—
C
+
3AICR8
TE
Finsoso
|
JI-25
LS
一
3K3
3 SEC.
TIMED OPEN
>
D
4
J4-35
E
33 yfd
50 MFD,
¡+
—
3TBI-4
~
arsi-4
SCOPE
YEL
Lu
SRN
EXT |
P
HAND SWITCH
TRIG.
中
sal] X-RAY PUSH
ο-φο
BUTTONS
F
GND
-
y
°
lex
t leo
BLK
8TSI-5
46-13444/P!
stanu
二
5
344-5
3-7
394-19
Γ
83
T
84
22105-020
ILLUSTRATION 4-11-31
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