Basic HTML Version
Elashlamp Circuit
: POWER DRIVER BOARD
J125 '
,
Rash/amp
B
660
LS374
Black-xxx
J102
F111
,
J107,
+
Red-White
Power
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "8" the collector of
the 2N5401 transistor is high. Once point ·8· is high, point
"CO
the collector of the TIP102 transistor is
low. When Point
"CO
is low the flashlamp is grounded through the transistor and the flashlamp tums On.
When point "A" toggles high the circuit shuts Off.
Special (General PU[pose) Solenoid Circuit
r - - - - - - - - - - - - - - - - - - - - ~ - - - - - - - - - - -
I
, POWER DRIVER BOARD
Flashlamp·
or
Coil
Blue-xxx
Red-White
lOOl1f
sov
Power
The microprocessor toggles the output of the 74LS374. When point "A" drops low, point "8" is high. A
high at point "8" causes a low at point
"Co.
When point
"C·
is low the coillflashlamp is grounded through
the transistor and the coillflashlamp turns On. When point "A" toggles high the coillflashlamp turns Off.
*
Tieback Diode is not used for flash lamp circuit.
DEMOLrr/ON MAN 3-9