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SPECIAL (GENERAL PURPOSE) SOLENOID CIRCUIT
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Drive
J109
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~r_------------,
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Slue-XXX
FLASHER
or
COIL
!
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:
1
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Power
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~
POWER DRIVER BOARD
J128
D19
100mf
D21 100V
Red-White
+
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "B" the collector of
the 2N5401 transistor, is high. A high at point "B" causes a low at point "C". When point "C" is low, the
coillflashlamp is grounded through the transistor and turns on. When point "A" toggles high the
coillflashlamp turns off.
*
Tieback diode is not used for flashlamp circuit.
FLASHLAMP CIRCUIT
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1
Drive
vee
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J102
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1
x
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POWER DRIVER BOARD
J128
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1
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1
~D
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1
Power
-=-
-=-
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1
Block-XXX
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lFLASHER
1
1
1 Red-White
+
D18 D17
10,OOOmf
35V
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "B" the collector of
the 2N5401 transistor, is high. Once point "8" is high, point "C" the collector of the TIP102 transistor is
low. When point "C" is low, the flashlamp is grounded through the transistor and turns on. When point
"A" toggles high, the current shuts off.
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