The following information is taken from the June 1977 Gottlieb
Bit Hit manual. This may be helpful when debugging a startup
problem with this or other Gottlieb single-player games from the same
1. Inserting a coin or pressing the replay button actuates the 'S'
2. This relay will lock in through its own switch and a motor 2B
3. The following sequence takes place through the closed switches on
3a. 'R' relay is actuated.
3b. The motor starts running.
3c. A motor 2C switch actuates the total play meter and the 'AX'
relay, resets the ball count unit and subtracts the replay unit.
3d. Switches on motor 1A and motor 1D adds the hit unit once, the run off
switch then runs hit unit to zero position.
4. When 'AX' relay is actuated, it is locked in by the armature of
'AX' relay reset coil. Through closed switches on 'AX' relay
and the score unit runout switches the units are reset to zero through
switches on motor 1A and motor 4A. When all units are reset and motor 2B
makes, 'AX' relay reset coil is actuated. This releases the armature
on 'AX' relay and opens the switches. The reset cycle is now
5. Place the ball in the out hole. When the ball makes the ball return
switch, 'Q' relay is actuated. When 'Q' closes 'P'
actuates through normally closed switches on 'O', motor 1C and
'S'. 'P' runs the motor nd actuates 'O' through motor
4C and 'S'. 'O' locks in through normally closed switches on
'N', 'M', 'L', 'S' relays. The game is now set
6. Press the right flipper button and the motor starts running through
closed switches on 'Q' and 'O' relays. When motor 2C closes
the ball shooter activates through a closed switch on 'O' and shoots
the ball onto the playfield. When the ball return switch opens 'Q'
relay de-energizes and completes the circuit from the flipper switches to
the flipper coils. If the ball fails to hit a scoring contact 'O'
relay remains locked in there by keeping the circuit to 'P' open,
therefore the ball count unit will not add another ball.