Page 106 - Star Trek The Next Generation

High power Solenoid Circuit
: POWER DRIVER BOARD
+SOV
J130 I Playfield
I or
I Backbox Coil
~D~~X~ ,
I Violet-xxx
I
J107 I
I
I Violet-Yellow
100j!1
SOV
Power
I
I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J
The microprocessor toggles the output of the 74LS374. When point WA" drops low, point "8" the collector of the 2N5401
transistor is high. A high at paint "8" causes point "C" the collector of the TIP1 02 transistor, and point WDW the emitter of
the TIP36 transistor to drop low. When point "D" is low the coil is grounded through the transistor and the coil turns On.
The coil shuts Oft when point WAW toggles high.
Low power Solenoid Circuit
I POWER DRIVER BOARD
I
Drive +SOV
J113 Playfield
or
I Backbox Coil
Brown-xxx
I Violet-Qrange
100j!1
SOV
Power
The microprocessor toggles the output of the 74LS374. When point "A" is low, point "8" the collector of the 2N5401
transistor is driven high. A high at point "8" tums On the TIP1 02 transistor and causes point "C" to drop low. When
point WC" is low the coil is grounded through the transistor and the coil turns On. The coil shuts Off when point "A"
toggles high. 's'iiJiI'iileA
11IEnEXT IiEnEII.ilnlln 3-8