TM
115820-921-402
HIGH VOLTAGE OVERLOAD THRESHOLD ALIGNMENT
Ref. Desig.
Name
TEST EQUIPMENT
STEP NO.
TEST POINT
ADJUSTMENT
REMARKS
1
TOGGLE SWITCH NO. 1
CONNECT A TOGGLE SWITCH
AR
Amplifier
BETWEEN GND AND 1A2P1-6
C
Capacitor
POWER SUPPLY NO. 1
2
CONNECT -3.5V AT 700mA
CR
Diode Semiconductor Device
TO 1A2P1-10
DS
Lamp
POWER SUPPLY NO. 2
3
CONNECT -14VDC TO 1A2P1-13
L
Inductor
4
POWER SUPPLY NO. 3
CONNECT +19VDC TO 1A2P1-15
P
Plug (Connector)
5
TOGGLE SWITCH NO. 2
CONNECT A TOGGLE SWITCH
Q
Transistor
BETWEEN GND AND 1A2P1-12
R
Resistor
6
2 EA RESISTORS 1.2K
CONNECT LED (+) AND ONE
1 EA LED's
RESISTOR IN SERIES BETWEEN
S
Switch
PN755017A3011-3
1A2P1-21 AND +19VDC.
TP
Test Point
AND PN755017A3001-1
CONNECT LED (-3) AND ONE
U
Integrated Circuit
RESISTOR BETWEEN 1A2P1-11
VR
Voltage Regulator
AND +19VDC.
7
1A2R20
HV OVERLOAD THRESHOLD
POTENTIOMETER FCW.
8
LED (-1)
CLOSE TOGGLE SWITCH NO. 2
LED (-1) SHOULD ILLUMINATE
9
1A2DS1
1A2R20
ADJUST 1A2R20 CCW UNTIL
LED (-3)
OVERLOAD FAULT 1A2DS1
LED (-1)
AND LED (-3) ILLUMINATE.
LED (-1) SHOULD EXTINGUISH.
10
1A2DS1
CLOSE TOGGLE SWITCH NO. 1.
LED (-3)
BOTH 1A2DS1 AND LED (-3)
LED (-1)
SHOULD EXTINGUISH AND
LED (-1) SHOULD ILLUMINATE.
DISCONNECT TEST EQUIPMENT.
TRACK SIDE OR RUN SIDE
COMPONENT SIDE
NOTE: PREFIX ALL REFERENCE DESIGNATORS WITH 1A2
Figure 9. DC Control PWB 1A2, PN 755017A4220 (Sheet 2 of 2)
19
