TM
11-5820-921-40-2
DC OVERVOLTAGE ADJUSTMENT
TEST POINT
REMARKS
TEST EQUIPMENT
ADJUSTMENT
STEP NO.
1A3P1-3
1
C O N N E C T A V A R I A B L E DCPOWERSUPPLY
TO
VOM
1A3P1-3 AND SET TO +26.5 VDC.
VARIABLE POWER
SUPPLY
TOGGLE SWITCH
1A3P1-2
CONNECT A TOGGLE SWITCH BETWEEN GND
2
AND 1A3P1-2.
RESISTOR 1.5K
1A3P1-4
CONNECT THE RESISTOR AND LED IN SERIES
3
LED P/N 755107A3011-3
BETWEEN A +26.5 VDC SUPPLY AND 1A3P1-4.
4
TOGGLE SWITCH
CLOSE THE TOGGLE SWITCH ATTACH TO 1A3P1-2
ADJUST OVERVOLTAGE POTENTIOMETER
FULLY
5
1A3R3
COUNTERCLOCKWISE (FCCW).
ADJUST INPUT TO 1A3P1-3 TO +33 VDC 1 VDC
6
VARIABLE POWER
SUPPLY
1A3R3
ADJUST 1A3R3 CW UNTIL LED AT 1A3P1-4
7
ILLUMINATES
ADJUST INPUT TO 1A3P1-3 TO +26.5 VDC
8
VARIABLE POWER
SUPPLY
9
CONTINUE ADJUST INPUT TO 1A3P1-3 TOWARD
+33 VDC
10
THE LED AT 1A3P1-4 SHOULD EXTINGUISH AT
ABOUT +32 VDC.
11
DISCONNECT TEST EQUIPMENT
Ref. Desig.
Name
I
Capacitor
C
CR
Diode Semiconductor Device
P
Plug (Connector)
Q
Transistor
R
Resistor
TP
Test Point
COMPONENT SIDE
TRACK SIDE OR RUN SIDE
VR
Voltage Regulator
NOTE: PREFIX ALL REFERENCE DESIGNATORS WITH 1A3
10. System Control PWB 1A3, PN 755017A4230 (Sheet 2 of 2)
Figure
21
